Loss to follow-up was 32 percent order 50 mg kamagra free shipping erectile dysfunction and urologist, with a substantially higher loss to follow-up in the venlafaxine group (39% compared with 26%) discount kamagra 50 mg erectile dysfunction diet. Intention-to-treat analysis yielded no significant differences between treatment groups on any primary outcome measures (HAM-D, MADRS, CGI) at 24 weeks. However, sample size for this study was small, and it was underpowered because it had been designed as a pilot study. A 12-week, British fixed-dose trial randomized 361 mainly moderately ill patients (based on CGI severity score) treated in 43 general practices to either venlafaxine XR (75 mg/d) or 105 paroxetine (20 mg/d). Results revealed no significant differences in efficacy measures, quality of life scores, or adverse events between study groups. Venlafaxine compared with sertraline 106, 107 37 Two good trials and one fair trial compared the efficacy of sertraline to venlafaxine. A good quality Scandinavian trial compared venlafaxine (75-150 mg/d) to sertraline (50-100 mg/d) 107 in 147 patients who were mainly moderately to markedly ill. Study duration was 8 weeks; loss to follow-up was 19 percent. Both treatment groups showed statistically significant reductions in MADRS, HAM-D, and CGI scores. Response rates on the HAM-D scale were higher for venlafaxine at the endpoint (83% compared with 68%; P=0. No significant differences were noted for response or remission rates on MADRS and CGI scales. No significant differences were observed for adverse events. By contrast, the other two studies did not find any differences in efficacy between sertraline(50- 37, 106 150 mg/d) and venlafaxine XR (75-225 mg/d). Bupropion compared with SSRIs A recent, fair-rated meta-analysis compared the benefits and risks of bupropion to SSRIs as a 108 class in 1,332 adult outpatients with MDD. The age of the participants ranged from 36 to 70 years. The analysis included five double-blinded, head-to-head RCTs with study durations from 6 to 16 weeks. Three trials assessed the efficacy and safety of bupropion compared with sertraline, one assessed bupropion compared with paroxetine, and one assessed bupropion compared with fluoxetine. The weighted mean differences of CGI-S and HAM-A scores did not differ significantly between bupropion and SSRIs. However, the authors could not pool data on HAM-D and CGI-S because of lack of data. Bupropion compared with escitalopram A fair pooled data analysis of two identically designed RCTs assessed the comparative efficacy 42 of bupropion XL (300-450 mg/d), escitalopram (10-20 mg/d), and placebo. Both studies lasted 8 weeks and enrolled a total of 830 patients. No differences in efficacy could be detected between the two active treatments (HAM-D, CGI-I, CGI-S, HAD). After 8 weeks, 43 percent of patients on bupropion XL, 45 percent on escitalopram, and 34 percent on placebo achieved remission. Response rates were 62 percent, 65 percent, and 52 percent, respectively. Bupropion compared with fluoxetine A fair, 6-week study compared the efficacy of bupropion (225-450 mg/d) and fluoxetine (20-80 109 mg/d) in 123 patients with moderate to severe depression. Results presented no significant differences in efficacy measures (changes of HAM-D, HAM-A, CGI-S, CGI-I scores). Response rates were similar for Second-generation antidepressants 30 of 190 Final Update 5 Report Drug Effectiveness Review Project both drugs (bupropion, 62. Adverse events did not differ significantly between treatment groups. Another fair, 8-week RCT compared efficacy and sexual side effects of bupropion SR 110 (150-400 mg/d), fluoxetine (20-60 mg/d), and placebo in 456 outpatients with MDD. Results showed no statistically significant differences in efficacy. At endpoint, bupropion SR had more remitters than fluoxetine (47% compared with 40%). Bupropion SR also showed significantly fewer sexual side effects than fluoxetine throughout the study. Beginning at week 1 until endpoint, significantly more fluoxetine-treated patients than bupropion SR-treated patients (P<0. Bupropion compared with paroxetine One fair RCT examined the efficacy of bupropion SR (100-300 mg/d) and paroxetine (10-40 111, 112 mg/d) in 100 outpatients ages 60 years or older (range 60-88 years) over 6 weeks. The majority of patients were white (bupropion SR: 98%, paroxetine: 90%) and female (bupropion SR: 54%, paroxetine: 60%) and had not used antidepressants for the current episode before enrollment (bupropion SR 83%; paroxetine 88%). The overall loss to follow-up was 16 percent with no significant difference between treatment groups. Statistical LOCF analysis showed that efficacy in any outcome measure did not differ significantly between treatment groups. Response rates (≥ 50% reduction in HAM-D scores) were similar in both groups (bupropion SR 71%; paroxetine 77%). Both treatment groups improved significantly in quality-of-life scales (Quality- of-Life in Depression Scale [QLDS], Short Form-36 Health Survey [SF-36]) between baseline and endpoint (P<0. Bupropion compared with sertraline A fair, 16-week trial assessed efficacy and tolerability of bupropion SR (100-300 mg/d) and 113 sertraline (50-200 mg/d) in outpatients (N=248) with moderate to severe depression. Intention- to-treat analysis with a LOCF method was used to assess main outcome measures. Efficacy measures (changes of scores on HAM-D, HAM-A, CGI-S, CGI-I) did not differ significantly by treatment group. The article did not report on response or remission rates. Some adverse events (nausea, diarrhea, somnolence, sweating) were significantly higher among sertraline-treated patients (P<0. Discontinuation rates because of sexual adverse events were also significantly higher in the sertraline group (13. Two fair-rated RCTs compared the incidence of sexual dysfunction in 360 and 364 patients with MDD during 8 weeks of treatment with bupropion SR (150-400 mg/d), sertraline 114, 115 (50-200 mg/d), or placebo. Outcome measures were efficacy (HAM-D, CGI) and sexual dysfunction as assessed by investigators using DSM-IV definitions for sexual dysfunction disorders. Intention-to-treat analyses reported no significant differences in any efficacy measures between bupropion SR and sertraline at endpoints. During the studies, sertraline showed more sexual adverse events than bupropion at various time points. However, in one trial overall satisfaction with sexual function did not differ 114 significantly between the bupropion and the sertraline group at endpoint. In the other study, beginning at day 21 until the end of the study, the overall satisfaction with sexual function was 115 significantly higher in the bupropion group than in the sertraline group (P<0. Second-generation antidepressants 31 of 190 Final Update 5 Report Drug Effectiveness Review Project Nefazodone compared with fluoxetine Three studies with identical protocols examined the effects of antidepressive treatment with 116-118 either nefazodone or fluoxetine on sleep in outpatients with MDD.
One small study has shown son of hydroxyurea and transfusion therapy for children with that simple transfusion is equally effective for the transfusion abnormally elevated TCD velocities but no primary stroke is management of ACS as exchange transfusion discount 100mg kamagra with visa erectile dysfunction young age causes. The rationale is based on previous studies demon- sive respiratory decline or persistent hypoxia despite simple strating that hydroxyurea can lower TCD velocities in patients with transfusion order 50mg kamagra visa causes of erectile dysfunction in younger males. One small prospective study demonstrated with these lesions at baseline and with normal TCD velocities. Hydroxyurea use is associated with lower rates of tions in patients with SCD, with 13 of 33 (39%) patients in the no ACS26 and is indicated for prevention of recurrent ACS. However, the TAPS trial was not able to rocytapheresis after failure to respond to simple transfusions. A address 2 major questions, what is the best preoperative manage- dramatic reduction in hospitalization for ACS (and pain) was ment of individuals with other subtypes of SCD (HbSC or S observed in children undergoing chronic transfusion for primary thalassemia) and what is the optimal management for low-risk stroke prevention compared with the observed group. Pulmonary hyperten- occurring with acute splenic sequestration and transient RBC sion affects up to 30% of adults with SCD and strongly predicts morbidity,34 but there is no proven treatment. Acute splenic sequestration is typically accompanied by a precipitous decrease in hemoglobin level and the potential for transfusions and long-term anticoagulation have been suggested but hypovolemic shock. The immediate treatment is directed toward require investigation. Pregnant women with SCD have increased correction of hypovolemia with RBC transfusion. Because RBCs maternal and fetal mortality and morbidity. RBC transfusion is sequestered in the spleen are remobilized, patients should be indicated for the treatment of acute complications during pregnancy, transfused cautiously to prevent hyperviscosity after splenic seques- but there are insufﬁcient data currently to recommend its use prophylactically. Aliquots of 5 mL/kg may be administered, along with close monitoring of the spleen size, hemoglobin level, and determine the effectiveness of transfusion therapy for acute manage- cardiovascular status of the child. In cases of severe sequestration ment or prevention of vasoocclusive painful episodes, priapism, or and anemia with hypovolemic shock, initial transfusion with 10 prevention of other end organ damage due to SCD. In a retrospective multicenter study of 190 patients with SCD of genotypes SS or S 0, 67% of infants with Complications of transfusion therapy splenic sequestration had one or more recurrent episodes. Chronic RBC transfusion to remainder of this review focuses on alloimmunization in patients prevent recurrent splenic sequestration has not been prospectively with SCD, as well as current and future strategies to minimize risk. Severe anemia also occurs with Alloimmunization to RBC antigens is a major complication associ- transient aplastic episodes due to temporary suppression of erythro- ated with RBC transfusions in patients with SCD. Alloantibodies poiesis given the signiﬁcantly shortened lifespan of RBCs in and autoantibodies complicate RBC cross-matching, delay provi- patients with SCD. In a single institution observational study of sion of transfusions, and increase the labor and cost of providing Parvovirus B19–induced RBC aplasia, the median nadir hemoglo- compatible RBC units. The discordance of blood group simple RBC transfusion. Therefore, RBC transfusion should be adminis- antigen matching, and age at ﬁrst transfusion are also major tered slowly with serial small aliquots to prevent congestive heart determinants. More recently, insights into the genetic heterogeneity failure. Nearly 2 Prevalence of alloimmunization decades ago, a randomized controlled trial showed that preoperative In the United States, the incidence of alloimmunization in the simple transfusion to achieve a hemoglobin of 10 g/dL is equally general population has been estimated to be approximately 0. In comparison, the incidence of alloimmunization in patients aggressive transfusion therapy aimed to decrease the percent with SCD ranges from 18% to 76% with ABO and D matching Hematology 2013 441 alone; 5% to 14. If the antibody speciﬁcity is determined and the patient et al,37 O’Suoji et al38). Alloantibodies to the Rh (primarily C and E) requires transfusion, the administration of RBCs lacking the antigen and Kell (typically K) systems comprise more than 2/3 of the RBC is usually safe. In cases of hyperhemolysis syndrome, further antibodies detected in patients with SCD. Uncommon speciﬁcities transfusion may exacerbate ongoing hemolysis, so individual man- in these systems also affect patients with SCD and include agement is dependent on the severity of anemia and the rapidity of antibodies to the V/VS, hrB,Goa, and Jsa antigens. In cases of severe hemolysis and patients with SCD have multiple alloantibodies that can complicate hyperhemolysis, the patient will likely require transfusion and pretransfusion serologic evaluations and delay ﬁnding compatible corticosteroids and IVIg should be used in conjunction. In fact, the American Rare Donor Program receives the most imab and erythropoietin have both been used for the management of requests for rare units of RBCs for alloimmunized patients with DHTRs and hyperhemolysis, but larger studies are needed to SCD. DHTRs and DTRs may be underestimated in patients with SCD, so future prospective studies are needed to better Despite prophylactic C, E, and K matching, many patients with understand the pathophysiology, risk factors, and optimal manage- SCD continue to form antibodies with common Rh speciﬁcities (D, ment of this serious complication of RBC therapy. In a recent single-institution study of pediatric patients with SCD for whom limited RBC antigen-matching for C, E, K is RH diversity contributes to alloimmunization practiced, 16 of 180 transfused patients formed 9 anti-C, 7 anti-E, 38 The RHD and RHCE genes lie in close proximity and encode the D and 5 anti-K antibodies. The majority of cases were ascribed to antigen and the CE antigens in various combinations (ce, cE, Ce, or transfusion at outside institutions that may not provide C-, E-, and CE), respectively. The conventional RH genes are found in all K-matched RBCs, but 5 antibodies against Rh antigens occurred in population groups, although with different frequencies. Commercial patients who had Rh variants revealed by RH genotyping. We also antibody reagents detect expression of the 5 principal Rh antigens: recently reported a high rate of Rh alloimmunization in 182 D, C, c, E, and e. In the past decade, the genetic diversity of the RH transfused patients with SCD despite C-, E-, and K-matched RBCs 39 loci has been revealed, with more than 200 RHD and 80 RHCE primarily from African-American donors. Variant RHD and RHCE alleles encode Rh proteins antibodies were directed against the Rh system; 45% of chronic and with amino acid changes that cannot be distinguished with common 12% of episodically transfused patients were Rh immunized. Although RHD and RHCE ies occurred in patients homozygous for RH variant alleles. We variants are found in 1% to 2% of Europeans, the frequency in found tremendous RH diversity in this population, with the majority individuals of African descent appears to be much higher. Speciﬁc of patients carrying at least one variant RH allele and 43% with both Rh variants are more frequent in individuals of African descent and variant RHD and RHCE. However, not all Rh antibodies in this therefore may often be found in patients with SCD of African cohort could be explained by patient homozygosity for altered ancestry. These RBCs may lack common Rh antigen epitopes (eg, alleles at the corresponding RH loci. Therefore, we hypothesize that B s a hr or hr ) or carry new epitopes (eg, V, VS, Go ). Figure 1 Rh antibodies are also formed in response to African-American illustrates the RH allele prevalence and variants identiﬁed in a donor RBCs that express variant Rh antigens. Future studies will cohort of 320 patients with SCD followed at our institution. In summary, despite limited RBC antigen matching, alloimmunization still occurs due to Rh variants Variations in RHD in patients and donors that are not detected by routine serology and In most populations, the D-negative (D ) phenotype of the Rh blood transfusion at institutions where prospective C-, E-, and K-antigen group system results almost invariably from deletion of the entire matching is not performed. Rare exceptions to this molecular basis of the D phenotype have been described. However, in a cohort of 82 D DTRs South-African donors, a minority had complete deletion of RHD. DHTRs, characterized by fever, pain, and signs of hemolysis (dark Sixty-six percent had an RHD pseudogene (RHD ) that contains a urine, jaundice, pallor) occurring a few days to 2 weeks after a 37-bp insertion that results in a premature stop codon, 15% had a transfusion, represent a potentially life-threatening complication of DIIIa-CE(4-7)-D hybrid gene characterized by C-antigen expres- RBC therapy.
Lombardo RCT Caucasion patients aged > 35 years w/ CHF purchase genuine kamagra on-line erectile dysfunction treatment pune, LV ejection SBP <90mm Hg; DBP <60mm Hg; HR <50 bpm; cerebral vascular 2006 fraction < 40% purchase kamagra with paypal erectile dysfunction treatment garlic, NYHA class II-III, stable clinical condition during accidents w/in previous 6 months; heart or vascular surgery or MI w/in prior 4 weeks. Beta blockers Page 307 of 494 Final Report Update 4 Drug Effectiveness Review Project Evidence Table 11. Head-to-head trials of beta blockers for heart failure Author Allowed other Age Year Interventions (drug, medications/ Method of outcome assessment Gender Country regimen, duration) interventions and timing of assessment Ethnicity Galatius Bisopolol started at 1. Ethnicity: 100% Nebivolol (neb) started at 6-minute walk test Caucasion 1. X 6 months Beta blockers Page 308 of 494 Final Report Update 4 Drug Effectiveness Review Project Evidence Table 11. Head-to-head trials of beta blockers for heart failure Number Number Author Other population screened/ Author withdrawn/ Year characteristics eligible/ Year lost to fu/ Country (diagnosis, etc) enrolled Country analyzed Galatius NYHA class III-IV=19. NR/70/70 Lombardo 2/0/70 2006 NYHA function class 2. Head-to-head trials of beta blockers for heart failure Author Year Method of adverse effects Adverse effects Country Outcomes assessment? Beta blockers Page 310 of 494 Final Report Update 4 Drug Effectiveness Review Project Evidence Table 11. Head-to-head trials of beta blockers for heart failure Author Withdrawals due to Year adverse events (%, Country adverse n/enrolled n) Galatius 0 2004 Denmark Poor Quality Lombardo 2. Quality assessments of head-to-head trials of beta blockers for heart failure Author Year Randomization Allocation Groups similar at Country described? Quality assessments of head-to-head trials of beta blockers for heart failure Author Eligibility Outcome Care Patient Year criteria assessors provider unaware of Country Exclusion criteria for recruitment specified blinded blinded treatment Sanderson Valvular heart disease as the etiology of LV dysfunction, active Yes Yes Yes Yes 1999 myocarditis, unstable angina, a documented history of sustained China ventricular tachycardia or symptomatic nonsustained ventricular tachycardia or second- or third degree atrioventricular block; chronic obstructive lung diseases, asthma, long-term alcohol or drug abuse or chronic renal failure (serum creatine >200 mmol/liter), hepatic hematological, neurological or collagen vascular disease Kukin Obstructive valvular disease, acute myocardial infarction within 6 weeks, Yes N/A - open N/A - open N/A - open 1999 or active angina study study study Metra Unstable angina,acute myoardial infarction, or a coronary Yes Yes Yes Yes 2000 revascularization procedure within 3 months; history of alcohol abuse; primary valve disease; congenital heart disease; systolic blood pressure <90 mm Hg; concomitant disease that might adversely influence prognosis or impair exercise capacity; contraindications to b-blocker therapy; concomitant treatment with other b-blockers, a-antagonists, calcium antagonists or antiarrhythmic agents (except amiodarone) Beta blockers Page 313 of 494 Final Report Update 4 Drug Effectiveness Review Project Evidence Table 12. Quality assessments of head-to-head trials of beta blockers for heart failure Author Maintenance of Reporting of attrition, Year Intention-to-treat comparable crossovers, adherence, Loss to follow-up: Country (ITT) analysis groups and contamination differential/high Score Sanderson Unclear Unclear Attrition reported; Others NR Fair 1999 NR China Kukin No NR Attrition reported; Others None Fair 1999 NR Metra No NR Attrition reported; Others None Fair 2000 NR Beta blockers Page 314 of 494 Final Report Update 4 Drug Effectiveness Review Project Evidence Table 12. Quality assessments of head-to-head trials of beta blockers for heart failure Author Year Country Funding Control group standard of care Length of follow-up Sanderson NR Yes 12 weeks 1999 China Kukin SKB Yes 6 months 1999 Metra CARIPLO funds University of Brescia Yes 44 months 2000 Beta blockers Page 315 of 494 Final Report Update 4 Drug Effectiveness Review Project Evidence Table 12. Quality assessments of head-to-head trials of beta blockers for heart failure Author Year Randomization Allocation Groups similar at Country described? Metoprolol European Trial (COMET) Beta blockers Page 316 of 494 Final Report Update 4 Drug Effectiveness Review Project Evidence Table 12. Quality assessments of head-to-head trials of beta blockers for heart failure Author Eligibility Outcome Care Patient Year criteria assessors provider unaware of Country Exclusion criteria for recruitment specified blinded blinded treatment Metra Patients with an acute ischemic event or a coronary revascularization Yes Yes Yes Yes 2002 procedure within 3 months; a history of alcohol abuse; primary valve US, Italy disease or congenital heart disease; frequent ventricular premature beats and/or runs of ventricular tachycardia; contraindications to beta-blocker therapy; concomitant treatment with other beta-blockers, a-antagonists, calcium antagonists or antiarrhythmic agents (except amiodarone) Poole-Wilson Recent change in treatment within 2 weeks before randomization; Yes Yes Yes Yes 2003 requirement for intravenous inotropic therapy; current treatment with non- Europe dihydropyridine calcium channel blockers (diltiazem, verapamil); amiodarone (>200 mg per day); class-I antiarrhythmic drugs; unstable Carvedilol Or angina; myocardial infarction; coronary revascularisation or stroke within Metoprolol the previous 2 months; uncontrolled hypertension (SBP >170 mm Hg or European Trial DBP >105 mm Hg); hemodynamically significant valvular disease; (COMET) symptomatic and sustained ventricular arrhythmias within the past 2 months note adequately treatment with antiarrhythmic drugs or implantation of an automatic defibrillator; pregnancy; women with childbrearing potential on inadequate contraception; known drug or alcohol misuse; poor compliance; any other serious systemic disease; contraindication to beta blockers Beta blockers Page 317 of 494 Final Report Update 4 Drug Effectiveness Review Project Evidence Table 12. Quality assessments of head-to-head trials of beta blockers for heart failure Author Maintenance of Reporting of attrition, Year Intention-to-treat comparable crossovers, adherence, Loss to follow-up: Country (ITT) analysis groups and contamination differential/high Score Metra No NR Attrition reported; Others None Fair 2002 NR US, Italy Poole-Wilson Yes NR 31. Quality assessments of head-to-head trials of beta blockers for heart failure Author Year Country Funding Control group standard of care Length of follow-up Metra NR Yes 9-12 months 2002 US, Italy Poole-Wilson F Hoffman La Roche and GlaxoSmithKline; Yes 58 months 2003 first author has served as a consultant to or Europe received travel expenses, payment for speaking at meetings or funding for Carvedilol Or research from one or more of the major Metoprolol pharmaceutical companies European Trial (COMET) Beta blockers Page 319 of 494 Final Report Update 4 Drug Effectiveness Review Project Evidence Table 12. Quality assessments of head-to-head trials of beta blockers for heart failure Author Year Randomization Allocation Groups similar at Country described? Beta blockers Page 320 of 494 Final Report Update 4 Drug Effectiveness Review Project Evidence Table 12. Quality assessments of head-to-head trials of beta blockers for heart failure Author Eligibility Outcome Care Patient Year criteria assessors provider unaware of Country Exclusion criteria for recruitment specified blinded blinded treatment Galatius Patients who had contraindications for BB treatment; and those who had Yes No No No 2004 been admitted, had attended an emergency room, or who had been treated in the heart failure clinic for acute decompensation within 2 weeks prior to randomization. Patients were excluded from data analysis if they died before two months of follow-up. Lombardo SBP <90mm Hg; DBP <60mm Hg; HR <50 bpm; cerebral vascular Yes No No No 2006 accidents w/in previous 6 months; heart or vascular surgery or MI w/in Italy previous 3 months; serious valvular conditions that required surgery; atrioventricular conduction abnormalites; milignancies; serious liver, kidney, connective tissue, respiratory, or hematologic disease; history of allergy; intolerance to ACE inhibitors; unstable angina, DM; digitalis intolerance; BMI >30; excercise tolerance limited by other disorders; pregnancy. Beta blockers Page 321 of 494 Final Report Update 4 Drug Effectiveness Review Project Evidence Table 12. Quality assessments of head-to-head trials of beta blockers for heart failure Author Maintenance of Reporting of attrition, Year Intention-to-treat comparable crossovers, adherence, Loss to follow-up: Country (ITT) analysis groups and contamination differential/high Score Galatius No; excluded 3 NR Yes NR Poor 2004 patients that died No prior to completing 2 No months of treatment No Lombardo Yes Yes Yes NR Fair 2006 No Italy No No Beta blockers Page 322 of 494 Final Report Update 4 Drug Effectiveness Review Project Evidence Table 12. Quality assessments of head-to-head trials of beta blockers for heart failure Author Year Country Funding Control group standard of care Length of follow-up Galatius Danish Pharmacy Foundation, Merck Sharp Yes 10. Outcomes in head-to-head trials of beta blockers for heart failure Sample Worsening Trial Interventions* size Duration Baseline EF Mortality heart failure Sanderson Carvedilol 51 12 weeks 26% NR NR 1999 Metoprolol Fair Kukin Carvedilol 67 6 months 18-19% NR car=3/37(8. Outcomes in head-to-head trials of beta blockers for heart failure Change in EF following Trial NYHA Class Exercise capacity treatment Sanderson # patients at NYHA class I/II/III/IV Improvement in 6-min walk(feet) Mean EF at Week 12 (% 1999 car car=72(6. Outcomes in head-to-head trials of beta blockers for heart failure Trial Quality of life Sanderson Minnesota QOL mean reduction in symptom 1999 score (%) car=9. Randomized controlled trials of beta blockers for arrhythmia Author Year Study design Country Setting Eligibility criteria Exclusion criteria Head-to-head trials Katritsis RCT Patients subjected to cardioversion of Terminal illness, age > 80 years, left ventricular 2003 multicenter persistent AF (> 7 days) ejection fraction <30, concomitant treatment with class I or III antiarrhythmic drugs, amiodarone use Fair quality within 3 months before randomization, previous treatment with bisoprolol or carvedilol, and contraindications to beta blockade, such as conduction disturbances, asthma, or severe chronic obstructive pulmonary artery disease Beta blockers Page 327 of 494 Final Report Update 4 Drug Effectiveness Review Project Evidence Table 14. Randomized controlled trials of beta blockers for arrhythmia Author Allowed other Method of outcome Age Year Interventions (drug, regimen, medications/ assessment and timing of Gender Country duration) interventions assessment Ethnicity Head-to-head trials Katritsis Bisoprolol 10 mg daily (or 5 mg No restrictions, with Clinic visits at months 1, 3, Mean 2003 daily if LVEF < 40%) exception of class I 6 and 12 age=65. Randomized controlled trials of beta blockers for arrhythmia Number Author Number screened/ withdrawn/ Year Other population characteristics eligible/ lost to fu/ Country (diagnosis, etc) enrolled analyzed Outcomes Head-to-head trials Katritsis Heart rate=71. Randomized controlled trials of beta blockers for arrhythmia Author Year Method of adverse Adverse effects Withdrawals due to adverse events Country effects assessment? Randomized controlled trials of beta blockers for arrhythmia Author Year Study design Country Setting Eligibility criteria Exclusion criteria Placebo- controlled trials Metoprolol vs placebo Kuhlkamp RCT Patients at 71 centers with persistent atrial Use of Class 1 or 3 antiarrhythmic drug, beta- 2000 multicenter fibrillation of 3 days to 1 year. Must be blockers or calcium channel blockers; chronic Germany converted to sinus rhythm. Sufficient treatment with amiodarone within 6 months; anticoagulation for 1+ months strongly contraindications to beta-adrenergic blocking recommended to providers. Randomized controlled trials of beta blockers for arrhythmia Author Allowed other Method of outcome Age Year Interventions (drug, regimen, medications/ assessment and timing of Gender Country duration) interventions assessment Ethnicity Placebo- controlled trials Metoprolol vs placebo Kuhlkamp n = 403 Digoxin/digitoxin, Primary endpoint: Mean age 2000 metoprolol (met): start 100 mg/day ACE inhibitor, relapse into atrial fibrillation 60. Randomized controlled trials of beta blockers for arrhythmia Number Author Number screened/ withdrawn/ Year Other population characteristics eligible/ lost to fu/ Country (diagnosis, etc) enrolled analyzed Outcomes Placebo- controlled trials Metoprolol vs placebo Kuhlkamp Previous cardioversion: Screened = NR Lost for efficacy data (no Death: 2000 met = 18/197 (9%) pla = 22/197 (11%) Eligible = NR followup ECG) = 9/403 met = 3/200 (2%) pla = 0 Germany Hypertension: Enrolled = 403 (2%) met = 96/197 (49%) pla = 91/197 (46%) Lost for safety data = Premature discontinuation due to relapse to Coronary artery disease: 4/403 (1%) atrial fibrillation/flutter: met = 52/197 (26%) pla = 48/197 (24%) met = 96/197 (49%) Heart failure: Analyzed = 394/403 (98%) pla = 118/197 (60%) met = 51/197 (26%) pla = 49/197 (25%) and 399/403 (99%) Stroke/TIA: Total relapse to atrial fibrillation: met = 15/197 (8%) pla = 12/197 (12%) met = 87/197 (44%) Diabetes mellitus: pla = 118/197 (60%) met = 23/197 (12%) pla = 17/197 (9%) NYHA 1: met = 125/197 (64%) pla = 137/197 (70%) NYHA2: met = 64/197 (33%) pla = 54/197 (27%) NYHA3: met = 8/197 (4%) pla = 6/197 (3%) Beta blockers Page 333 of 494 Final Report Update 4 Drug Effectiveness Review Project Evidence Table 14. Randomized controlled trials of beta blockers for arrhythmia Author Year Method of adverse Adverse effects Withdrawals due to adverse events Country effects assessment? Randomized controlled trials of beta blockers for arrhythmia Author Year Study design Country Setting Eligibility criteria Exclusion criteria Metoprolol vs placebo Khand RCT Patients with persistent atrial fibrillation (> 1 Heart rate at rest < 60 beats/min, systolic blood 2003 multicenter month) and heart failure (appropriate symptoms pressure < 90 mm Hg, sick sinus synddrome or UK of heart failure for more than two months and complete heart block, current treatment with a beta- echocardiographic evidence of cardiac blocker or HR-lowering calcium channel antagonist Fair quality dysfunction [LVEF < 40% or preserved LV or > 200 mg amiodarone, recent major systolic function, together with LV hypertrophy, cardiovascular event or procedures, asthma or suggesting diastolic dysfunction in the absence reversible obstructive airways disease, serum of an alternative potential cause of symptoms]) creatinine > 250 µmol/l or significant hepatic who were receiving digoxin and diuretics disease, uncorrected significant valvular heart disease, or any life-threatening noncardiac disease Beta blockers Page 335 of 494 Final Report Update 4 Drug Effectiveness Review Project Evidence Table 14. Randomized controlled trials of beta blockers for arrhythmia Author Allowed other Method of outcome Age Year Interventions (drug, regimen, medications/ assessment and timing of Gender Country duration) interventions assessment Ethnicity Metoprolol vs placebo Khand Phase I ACE inhibitors 1) LVEF Mean 2003 Open digoxin +placebo Warfarin 2) Ventricular rate control by age=68. Randomized controlled trials of beta blockers for arrhythmia Number Author Number screened/ withdrawn/ Year Other population characteristics eligible/ lost to fu/ Country (diagnosis, etc) enrolled analyzed Outcomes Metoprolol vs placebo Khand IHD etiology=40. Randomized controlled trials of beta blockers for arrhythmia Author Year Method of adverse Adverse effects Withdrawals due to adverse events Country effects assessment? Quality assessments of randomized controlled trials of beta blockers for arrhythmia Author Year Allocation Groups similar Similarity to target Number Country Random assignment concealed at baseline population recruited Head-to- head trials Katritsis NR NR Yes Selected for patients 102 2003 naïve to study drugs Placebo- controlled trials Metoprolol vs placebo Kuhlkamp Adequate, computer NR Yes No - selection for 403 2000 generated healthier population - mean age of sample = 60 years; mean age atrial fibrillation patients = 75 years Beta blockers Page 339 of 494 Final Report Update 4 Drug Effectiveness Review Project Evidence Table 15. Quality assessments of randomized controlled trials of beta blockers for arrhythmia Author Eligibility Outcome Care Patient Intention-to- Maintenance of Year criteria assessors provider unaware of treat (ITT) comparable Country Exclusion criteria for recruitment specified blinded blinded treatment analysis groups Head-to- head trials Katritsis Terminal illness, age > 80 years, left ventricular Yes Yes NR NR No NR 2003 ejection fraction <30, concomitant treatment with class I or III antiarrhythmic drugs, amiodarone use within 3 months before randomization, previous treatment with bisoprolol or carvedilol, and contraindications to beta blockade, such as conduction disturbances, asthma, or severe chronic obstructive pulmonary artery disease Placebo- controlled trials Metoprolol vs placebo Kuhlkamp • Use of Class 1 or 3 antiarrhythmic drug, beta- Yes NR Yes Yes No Yes 2000 blockers or calcium channel blockers; chronic treatment with amiodarone within 6 months. Quality assessments of randomized controlled trials of beta blockers for arrhythmia Reporting of attrition, Differential loss to Control Author crossovers, follow-up or Score group Year adherence, and overall high loss to (good/ fair/ standard of Length of Country contamination follow-up poor) Funding care follow-up Head-to- head trials Katritsis Yes No Fair NR Yes 12 months 2003 No No No No Placebo- controlled trials Metoprolol vs placebo Kuhlkamp Attrition=6. Quality assessments of randomized controlled trials of beta blockers for arrhythmia Author Year Allocation Groups similar Similarity to target Number Country Random assignment concealed at baseline population recruited Metoprolol vs placebo Khand NR NR Yes Mean age=68. Quality assessments of randomized controlled trials of beta blockers for arrhythmia Author Eligibility Outcome Care Patient Intention-to- Maintenance of Year criteria assessors provider unaware of treat (ITT) comparable Country Exclusion criteria for recruitment specified blinded blinded treatment analysis groups Metoprolol vs placebo Khand Heart rate at rest < 60 beats/min, systolic blood Yes Yes Yes Yes Yes NR 2003 pressure < 90 mm Hg, sick sinus syndrome or UK complete heart block, current treatment with a beta- blocker or HR-lowering calcium channel antagonist or > 200 mg amiodarone, recent major cardiovascular event or procedures, asthma or reversible obstructive airways disease, serum creatinine > 250 µmol/l or significant hepatic disease, uncorrected significant valvular heart disease, or any life-threatening noncardiac disease Beta blockers Page 343 of 494 Final Report Update 4 Drug Effectiveness Review Project Evidence Table 15. Quality assessments of randomized controlled trials of beta blockers for arrhythmia Reporting of attrition, Differential loss to Control Author crossovers, follow-up or Score group Year adherence, and overall high loss to (good/ fair/ standard of Length of Country contamination follow-up poor) Funding care follow-up Metoprolol vs placebo Khand Yes No Fair Roche Yes Phase I=4 2003 No No Pharmaceuticals months; UK No Phase II=6 No months Beta blockers Page 344 of 494 Final Report Update 4 Drug Effectiveness Review Project Evidence Table 16. Placebo controlled trials of beta blockers for migraine Author Year Allowed other Country Interventions (drug, medications/ Study Design Eligibility criteria Exclusion criteria regimen, duration) interventions Fair quality Atenolol Forssman History of migraine (Ad Hoc Committee) NR Atenolol (ate) 100 mg daily Common analgesics and 1982 Placebo (pla) x 90 days; then ergotamine Sweden crossover Fair quality RCT Crossover Beta blockers Page 345 of 494 Final Report Update 4 Drug Effectiveness Review Project Evidence Table 16.
Sometimes the uterosacral ligaments very near to the uterus and your working field are not easy to identify and they are usually cut now discount kamagra master card erectile dysfunction case study. Make sure at every step that the bladder is with the remaining paracervical tissue and when deflected down sufficiently order kamagra canada erectile dysfunction treatment michigan. So don’t worry if you don’t cised using a Heaney stitch. Once the major have access to the ligaments or can’t identify them. Place a so high that the likelihood of your patient develop- strong clamp on each ligament very close to the ing it in her remaining cervical stump outweighs uterine body as the ureters and the sigmoid are in the immediate benefits of being operated in your close proximity. To perform an operation for cervical cancer ing the sutures long after cutting the needle. Opening of the vagina Palpate the cervix between your index finger and your thumb while putting traction on the uterus. You will feel it abdominally COMMUNITY SENSITIZATION AND well as a hard tumor within the soft vagina. Make PREVENTION sure the bladder is deflected sufficiently. Put curved As explained above, at present nobody knows how forceps on the vagina right below the cervix from to prevent the development or growth of fibroids both sides and let them touch each other in the as we don’t know how they develop. It is easier to cut people aware of this condition, its symptoms and the vaginal tissue around the cervix by using a knife treatment options in order to motivate women to than scissors. To put If you work in an area where many women suffer traction on the cervix you have to grasp it with a from anemia and other problems of fibroids it is tenaculum. Don’t forget that husbands from your forceps and that no bowel is included in and fathers need to know about reproductive health your stitch. Leave the sutures on the vagina top problems as well as they might get to see symptoms long and secure them with a small forceps. They and can serve through their wives as multipliers of mark the lateral margins of the vagina. The same accounts for community or sacral ligaments were dissected separately you can religious leaders, female and male. In addition you tie those sutures with your vaginal sutures. Cauterize or suture any FUTURE OUTLOOK bleeding vessels and wash the abdominal cavity Currently, a lot of research is done on medical treat- with warm saline. Visualize both ureters through ment for uterine fibroids. Even if they are not yet the peritoneum and see if they move and are not available, they will become so in future. If you Please note, although it might sometimes seem eas- have internet access it is good to check on new trial ier, subtotal hysterectomy (the resection of the uter- results, e. You can download free screening for cervical cancer is not accessible or articles from PubMed and the Cochrane library. You should then rather consider referring You should aim for meta-analyses, randomized 226 Uterine Fibroids controlled trials (RCTs) or systematic reviews as blockage of late follicle development and mid-cycle they give the best evidence levels to support your luteinizing hormone peak. A randomized controlled trial on long- already available for industrialized countries may term low-dose treatment for fibroids with mifepris- become feasible in your region as well in the future tone showed significant reduction in uterine size, and it is good to know about them even now to higher rates of amenorrhea and better quality of life incorporate them in your treatment plans as soon as in the mifepristone group compared to placebo17. Aromatase inhibi- A systematic review of mifepristone for fibroid tors, for example, are included in breast cancer treatment confirmed those findings but found one treatment guidelines of the Breast Health Global significant adverse effect, a tendency towards dose- Initiative, a non-governmental organization dependent endometrium hyperplasia18. Other PA (NGO) for enhanced level facilities in low- and are currently under investigation with good safety middle-income countries. Below we will explain Selective prostaglandin receptor modulators these treatment options for you to become familiar SPRMs are drugs that change the ability of cellular with them. You can use the names as search terms progesterone receptors to produce genes involved for your internet query to keep track on their in female reproductive hormone production. Randomized controlled trials on SPRMs showed significant reduction in fibroid size and uterine Medical treatment in the future volume with no serious adverse effects (level of evidence 1)19. One SPRM called ulipristal acetate, Treatments change and so do healthcare facilities. Gonadotropin-releasing hormone analogs Aromatase inhibitors Gonadotropin-releasing hormone analogs (GnRHa) AIs are currently used in the treatment of hormone are mainly used for in vitro fertilization or the treat- receptor-positive breast cancer. The most com- ment of endometriosis and are suitable for the monly used drug is called anastrozole. They are matase is a key enzyme in estrogen production. Recently, small studies have settings at the moment. As metrium and suppress hormone production via mentioned before this presently needs expensive 227 GYNECOLOGY FOR LESS-RESOURCED LOCATIONS high-tech equipment but many low- or less- 8. Intrauterine resourced countries have already introduced progestins, progesterone antagonists, and receptor modulators: a review of gynecologic applications. Am J hysteroscopic surgery in their fibroid treatment. It Obst Gyn 2010;202:420–8 is worth inquiring if there are facilities in your 9. Fertility and Laparoscopic myomectomy or hysterectomy obstetric outcome after laparoscopic myomectomy of large myomata: a randomized comparison with abdo- The same accounts for laparoscopic surgery which minal myomectomy. Hum Reprod 2000;15:2663–8 needs even more expensive equipment. Recurrence laparoscopic surgery is an essential part of infertility of leiomyomata after laparoscopic myomectomy. J Am treatment many high-level services in less- or low- Assoc Gynecol Laparosc 2001;8:495–500 (cited in ref. Interventions to reduce treatment options such as in India or Mozambique. The advantage of laparoscopic surgery is faster Cochrane Database Syst Rev 2011;11:CD005355 13. Bupivacaine plus recovery with a shorter hospital stay and fewer epinephrine for laparoscopic myomectomy: a random- complications. In the long run, capital costs for ized placebo-controlled trial. Obstet Gynecol 2004;104: laparoscopic surgery may be recovered and cost- 243–9 effectiveness can be achieved. Reducing blood method is not applicable on a regional or district loss at open myomectomy using triple tourniquets: a randomised controlled trial. BJOG 2005;112:340–5 level in low-resource settings due to its vulnerable, 15. Myomectomy and the expensive material and its dependency on continu- management of fibroids in pregnancy.
Reactivation of latent HIV-1 provirus via targeting protein phosphatase- 1 discount kamagra 100 mg erectile dysfunction doctors minneapolis. Histone deacetylase inhibitor romidepsin induces HIV in resting CD4+ T cells from ART-suppressed subjects at concentrations achieved by clinical dosing best purchase kamagra erectile dysfunction treatment duration. Maraviroc intensification for suboptimal CD4+ cell response despite sus- tained virologic suppression: ACTG 5256. Novel structurally related compounds reactivate latent HIV-1 in a bcl-2-trans- duced primary CD4+ T cell model without inducing global T cell activation. Engineered TCR-redirected clearance of Gag-positive reservoir cells from ART- treated subjects. Treatment intensification has no effect on the HIV CNS infection in patients on suppressive ART. JAIDS 2010, 55:590-6 Yukl SA, Boritz E, Busch M, et al. Challenges in detecting HIV persistence during potentially curative interven- tions: a study of the Berlin patient. PLoS Pathog 2013, 9:e1003347 Yukl SA, Shergill AK, McQuaid K, et al. Effect of raltegravir-containing intensification on HIV burden and T-cell activation in multiple gut sites of HIV-positive adults on suppressive antiretroviral therapy. Hematopoietic cell transplantation and HIV cure: where we are and what next? When to start ART CHRISTIAN HOFFMANN Since the introduction of ART, practice of treatment initiation is ever-changing. Facing encouraging results with early AZT in 1995, David Ho initiated the slogan “hit hard, hit early”, and almost all clinicians were taking him at his word. However, over the following years it became obvious that the tolerability of first generation ART regimens was poor. Patients complained about high pill burden and physicians became more defensive. There was controversial debate about the best time for ini- tiation and the indication for antiretroviral therapy was based on clinical assessment, CD4 T cell count and viral load. The risk of AIDS and other HIV-associated compli- cations had to be weighed against the risks of long-term toxicity and viral resistance. In Europe, the median CD4 T cell count at initiation of ART was only 200/µl in the first years of the last decade, after being 270/µl in 1998 (May 2006). In more recent years, the pendulum has been swinging back. With regard to new drugs that are more potent and better to tolerate, there is a strong trend towards earlier treatment initiation. In 2007/2008, most guidelines have determined that a CD4 T cell count of <350 cells/µl, instead of 200 cells/µl, is the definitive threshold for initiation of ART in all asymptomatic patients. During the last years, the thresh- old was raised up to 500 cells/µl in many guidelines (US/WHO). However, patients in resource-limited countries are still starting their ART at CD4 cells lower than 200/µl (Mugglin 2012). Facing the early results of the landmark START trial published in May 2015 (see below), the discussion whether and when to start ART may come to an end. The question “When to start ART” may change to “Why not yet started ART? There is no doubt that current guidelines in the USA and (especially in) Europe (see Table 5. Decisions must still be made on a case-by-case basis. In some cases, therapy might (or even should) be deferred. Last but not least, the patient should be ready to start. Experience as well as some intuition of the treating physician is mandatory. CDC B+C All values “Is always recommended” (DHHS, EACS) CDC A <350 “Is always recommended” (DHHS, EACS) CDC A 350-500 “Is recommended” (rating: strong) (DHSS) “Should be considered in asymptomatic patients, recommended in patients with several conditions like hepatitis coinfection, malignant or renal diseases, high risk of cardiovascular/malignant diseases” (EACS) CDC A >500 “Is recommended (rating: moderate) in asymptomatic patients, recommended (rating: strong) in patients with hepatitis coinfection, renal and other diseases” (DHSS) “Should be considered in asymptomatic patients, recommended if one of the points listed in 350–500 apply” (EACS) DHHS: US Department of Health and Human Services. Guidelines for the use of antiretroviral agents in HIV-1-infected adults and adolescents. Guidelines for the clinical management and treatment of HIV-infected adults in Europe. When to start ART 167 How high is the individual risk of progression? The following table lists the (selected) risks of developing AIDS within six months, as identified in 3,326 patients from the pre-HAART era (Phillips 2004). The range of the individual risk of progression, calculated by using CD4 T cells, viral load and age only, varies widely – from 0 to almost 50%. This may also demonstrate how helpful these surrogate markers can be. These data were derived from 12 cohorts in Europe and North America, in which more than 20,000 patients started antiretroviral therapy between 1995 and 2003 (May 2007). It is of note that the data apply only to asymptomatic patients without intravenous drug use (IVDU). In patients with AIDS and in IVDUs, progression risks can be much higher. On the other hand, it seems possible that these data overestimate the indi- vidual risk as risk may be lower with the newer drug combinations. Moreover, treat- ment interruptions were not taken into account. However, they could be helpful in any discussion with the patient, of course without browbeating or scaring them with statistics. Only valid for patients without previous AIDS and non-IVDUs <25 25–49 50–99 100–199 200–350 >350 CD4/μl CD4/μl CD4/μl CD4/μl CD4/μl CD4/μl 16–29 years VL <100. VL is copies/mL, CD4 is cells/μl 168 ART One important caveat of cohort studies is the fact that the individual treatment success of the patient is not taken into account. This was shown by an analysis of 13 cohort studies from Europe and North America including 9,323 adult treatment- naïve patients who started ART with a combination of at least three drugs. At 6 months after starting ART, the current CD4 T cell count and viral load, but not values at baseline, were strongly associated with subsequent disease progression (Chene 2003). To evaluate the individual risk for a treatment-naïve patient, one can check www. It is also possible to calculate the risk after 6 months on ART. Practical experiences Even if the indication for ART seems obvious or even urgent, it should be clarified whether the patient is indeed prepared to start treatment (treatment readiness).
Long-term therapy with addition of pioglitazone to metformin compared with the addition of gliclazide to metformin in patients with type 2 diabetes: a randomized buy kamagra 100 mg otc erectile dysfunction university of maryland, comparative study kamagra 50mg low price erectile dysfunction medication injection. Thiazolidinediones Page 107 of 193 Final Report Update 1 Drug Effectiveness Review Project 232. A case of secondary diabetes mellitus with acromegaly improved by pioglitazone. Rosiglitazone in the management of older patients with type 2 diabetes mellitus. Effects of pioglitazone on diabetes-related outcomes in Hispanic patients. Chan NN, Tong PC, So WY, Leung WY, Chiu CK, Chan JC. The metabolic effects of insulin and rosiglitazone combination therapy in Chinese type 2 diabetic patients with nephropathy. Thiazolidinedione safety and efficacy in ambulatory patients receiving hemodialysis. Effects of pioglitazone on endothelial function, insulin sensitivity, and glucose control in subjects with coronary artery disease and new- onset type 2 diabetes. Thiazolidinediones Page 108 of 193 Final Report Update 1 Drug Effectiveness Review Project Appendix A. Search strategies for update 1 Database: Ovid MEDLINE(R) <1996 to October Week 5 2007> Search Strategy: (duplicate) -------------------------------------------------------------------------------- 1 exp THIAZOLIDINEDIONES/ (4461) 2 Pioglitazone. Addition of pioglitazone or bedtime insulin to maximal doses of sulfonylurea and metformin in type 2 diabetes patients with poor glucose control: a prospective, randomized trial. Bakris G, Viberti G, Weston WM, Heise M, Porter LE, Freed MI. Rosiglitazone reduces urinary albumin excretion in type II diabetes. Comparison of effect of pioglitazone with metformin or sulfonylurea (monotherapy and combination therapy) on postload glycemia and composite insulin sensitivity index during an oral glucose tolerance test in patients with type 2 diabetes. Pioglitazone hydrochloride in combination with metformin in the treatment of type 2 diabetes mellitus: A randomized, placebo-controlled study. Improved glycemic control and lipid profile in a randomized study of pioglitazone compared with acarbose in patients with type 2 diabetes mellitus. Treatment of type 2 diabetes with a combination regimen of repaglinide plus pioglitazone. Favorable effects of pioglitazone and metformin compared with gliclazide on lipoprotein subfractions in overweight patients with early type 2 diabetes. Results of a randomized, double-blind, placebo-controlled study administering glimepiride to patients with type 2 diabetes mellitus inadequately controlled with rosiglitazone monotherapy. Pioglitazone-induced hepatic injury in a patient previously receiving troglitazone with success. Thiazolidinediones Page 113 of 193 Final Report Update 1 Drug Effectiveness Review Project 10. Effect of pioglitazone on dyslipidemia in hemodialysis patients with type 2 diabetes. Effect of pioglitazone compared with metformin on glycemic control and indicators of insulin sensitivity in recently diagnosed patients with type 2 diabetes. The combined effect of triple therapy with rosiglitazone, metformin, and insulin aspart in type 2 diabetic patients. Use of glimepiride and insulin sensitizers in the treatment of type 2 diabetes--a study in Indians. Pioglitazone reduces atherogenic index of plasma in patients with type 2 diabetes. Comparison of pioglitazone and gliclazide in sustaining glycemic control over 2 years in patients with type 2 diabetes. Effects of rosiglitazone and metformin on liver fat content, hepatic insulin resistance, insulin clearance, and gene expression in adipose tissue in patients with type 2 diabetes. A diabetes outcome progression trial (ADOPT): an international multicenter study of the comparative efficacy of rosiglitazone, glyburide, and metformin in recently diagnosed type 2 diabetes. Effect of pioglitazone on arteriosclerosis in comparison with that of glibenclamide. Effect of addition of low-dose rosiglitazone to sulphonylurea therapy on glycemic control in type 2 diabetic patients. Excluded due to Thiazolidinediones Page 114 of 193 Final Report Update 1 Drug Effectiveness Review Project wrong publication type. Rosiglitazone improves, while Glibenclamide worsens blood pressure control in treated hypertensive diabetic and dyslipidemic subjects via modulation of insulin resistance and sympathetic activity. Thiazolidinediones Page 115 of 193 Final Report Update 1 Drug Effectiveness Review Project Appendix C. Quality assessment methods for drug class reviews for the Drug Effectiveness Review Project Study quality is objectively assessed using predetermined criteria for internal validity, based on the combination of the US Preventive Services Task Force and the NNS Center for Reviews and Dissemination criteria. Regardless of design, all studies that are included are assessed for quality and assigned a rating of “good,” “fair,” or “poor,” Studies with fatal flaws are rated poor quality. A fatal flaw is failure to meet combinations of criteria which may be related in indicating the presence of bias. An example would be inadequate procedure for randomization or allocation concealment combined with important differences in prognostic factors at baseline. Studies that meet all criteria are rated good quality, and the remainder is rated fair quality. As the fair-quality category is broad, studies with this rating vary in their strengths and weaknesses: The results of some fair-quality studies are likely to be valid, while others are only probably valid. A poor-quality trial is not valid; the results are at least as likely to reflect flaws in the study design as a true difference between the compared drugs. Does the review report a clear review question and inclusion/exclusion criteria that relate to the primary studies? A good-quality review should focus on a well-defined question or set of questions, which ideally are reflected in the inclusion/exclusion criteria, which guide the decision of whether to include or exclude specific primary studies. The criteria should relate to the 4 components of study design, indications (patient populations), interventions (drugs), and outcomes of interest. In addition, details should be reported relating to the process of decision-making, such as how many reviewers were involved, whether the studies were examined independently, and how disagreements between reviewers were resolved. Is there evidence of a substantial effort to search for all relevant research? If details of electronic database searches and other identification strategies are given, the answer to this question usually is yes. Ideally, details of the search terms, date, and language restrictions should be presented. In addition, descriptions of hand searching, attempts to identify unpublished material, and any contact with authors, industry, and research institutes should be provided. The appropriateness of the database(s) searched by the authors should also be considered. For example, if only MEDLINE was searched for a review looking at health education, then it is unlikely that all relevant studies were located.
Recent studies lend some 652 American Society of Hematology support to this latter notion in patients experiencing trauma buy cheap kamagra on line erectile dysfunction pills available in india. Therefore purchase 50 mg kamagra free shipping erectile dysfunction drugs in canada, the very general hypothesis that “older blood results in after transfusion in neonates, although fresh RBCs were not worse medical outcomes” covers the essence of what one would compared with older RBCs in that study. However, the more generalized a hypothesis, the more one into a pediatric population, with less induction from washed units. The result can lead to questions that are essentially meaningless in substance and impos- In addition to inducing cytokines in mice and dogs, transfusion of sible to answer. Although it is not clear that this is the case with older units of RBCs resulted in plasma factors that support the testing the hypothesis that “older blood results in worse medical growth of ferrophilic bacteria in either mice or human speci- outcomes,” it is necessary to give careful attention to this issue and mens. Solomon et al recently reported a study on dogs receiving a massive exchange transfusion after a pulmonary inoculation with Staphylo- One source of generalization in the question of whether “older blood coccus aureus. Blood transfusions are given for a wide infection, with increased tissue necrosis. These ﬁndings coincided number of different indications. The physiological effects of with ﬁndings indicating hemolysis in vivo, such as increased NO exposure to the biochemical changes that occur in a stored blood consumption and decreased haptoglobin. The above ﬁndings and product may be vastly different depending upon the pathophysiol- reports are generating a body of evidence implicating older RBCs in ogy of the transfusion recipient. Some retrospective trials have systemic inﬂammation and the potential promotion of bacterial looked at all hospitalized patients who were transfused within a infection in nonhuman animal models. However, other retrospective trials are It has been reported that stored RBCs acquire procoagulant activi- 30-33 certainly more focused and prospective trials are inevitably so due ties. These activities include changes in Russell viper venom 30 32 31 to the need to limit sample size as a practical matter. Nevertheless, time, clotting activity, increased thrombin generation, and 33 even in the narrower context, the problem persists. Although the mechanisms of these activities are not entirely elucidated, there are data to implicate Consider a trial that is focused on patients in a particular category of microparticles, the exposure of phospholipids, and a potential role disease (eg, trauma patients arriving at the emergency department, for tissue factor. Although provocative, the results of these in vitro patients with sickle cell disease, patients admitted to the intensive studies have yet to be transitioned into in vivo observations. Even within these deﬁnitions, which are clearly narrower than generalized Advanced glycation end products populations, there is a distinct heterogeneity of recipient pathology One of the effects upon exposure of proteins to glucose is a reaction that may alter the effects of stored blood transfusion. For example, between the aldehyde group of glucose with free amino groups, consider patients admitted to the intensive care unit. For the sake of leading to a Schiff base that rearranges into a series of advanced example, let us also assume that free hemoglobin in stored RBCs is glycation end (AGE) products, including carboxy-methyl-lysine. Overall, AGEs constitute a complex class of care patients may be suffering from insufﬁcient blood ﬂow to a vital molecular glycation with diverse structures. There are several receptors that have been described with the capacity to recognize organ (eg, thrombotic disease, atherosclerotic stenosis, etc). Most notably is the receptor for a patient, it is reasonable to predict that impairing vascular advanced glycation end products (RAGE). RAGE plays an active relaxation would exacerbate their condition and may lead to a worse role in inﬂammation and innate immune activation. However, another subset of intensive care patients may are stored in supraphysiological levels of glucose, it has been have a pathophysiology in which insufﬁcient vessel tone is playing a hypothesized that AGEs would be increased as a result of storage. In this case, it is possible that the scavenging of (ie, carboxy-methyl-lysine) and that they are capable of ligating NO may do no harm and may even have a therapeutic effect, RAGE, leading to alterations of cultured endothelial cells. Similarly, procoagu- play a role in inﬂammatory pathologies posttransfusion, such as lant activity in stored RBCs may be harmful to a patient with transfusion-related acute lung injury. Indeed, biologies of this nature could Testing the central hypothesis go a long way toward explaining why, in some settings, fresher It seems clear, or at least very likely, that retrospective approaches blood seems to be worse than older blood. The result of combined analyses of retrospective ﬁndings leads to a murky view with an In the above scenario, it is easy to see that even very real effects on equivocal outcome. Accordingly, ongoing analysis must involve outcome of disease treatment will be difﬁcult to observe due to the prospective trials. However, for such a prospective trial to be combination of disparate groups with alternate biological factors meaningful, it is necessary to ask the correct questions and collect into a single test population. To make matters worse, this same the appropriate data. Above all else, it is essential to frame the concern can be applied to each of the above known cellular and hypotheses in a fashion that is amenable to being tested and chemical changes that occur during RBC storage. Blood transfusion is clearly ologies may lead to waters too muddy to see through. Nevertheless, the accumulat- ing data showing that restrictive transfusion practices often result in The problems of oversimpliﬁcation through the combining of better medical outcomes provide a rational basis for the understand- disparate groups into a single category is not limited to patient ing that RBC transfusions may do more harm than good in certain populations. There is an additional and very serious concern settings. On the surface, role in this process is an essential question because the answer will this seems like a very straightforward notion indeed; one counts the guide both medical practice and basic research into storage technolo- time (in this case days) from when the unit was drawn and an gies that improve outcomes focusing on the health of the transfusion unequivocal age is determined as a function of time. Donor variation is perhaps best described Disclosures with regard to posttransfusion recovery and survival of 51Cr-labeled Conﬂict-of-interest disclosure: The author has received research RBCs. However, donor variation has also been described with funding from Terumo and Immucor, has consulted for Haemonetics, regard to in vitro “in the bag” hemolysis before transfusion, and has received honoraria from Cerus. Off-label drug use: None microparticle accumulation, and accumulation of leukotrienes. This same pattern of donor Correspondence variability is observed in animal models of RBC storage between James C. Zimring, MD, PhD, Puget Sound Blood Center Research genetically distinct strains of inbred mice. Scientiﬁc problems in the regulation of red blood cell donor’s blood may be pristine after 42 days of storage, whereas products. Do transfusions get to the heart of synthesis, microparticles, AGEs, and induce a cytokine storm after the matter? Failure of red blood measure quantitatively the characterized biology of stored RBC cell transfusion to increase oxygen transport or mixed venous units before transfusion and posttransfusion survivals/recoveries, PO2 in injured patients. Microvascular perfusion and is clearly impossible in retrospective studies. Transfusion thresholds systems that storing RBCs both increases recipient cytokine storm and other strategies for guiding allogeneic red blood cell upon transfusion and also increases the immunogenicity of at least transfusion. Middelburg RA, van de Watering LM, Briet E, van der Bom same recipient is transfused with fresh RBCs and then old RBCs JG. Storage time of red blood cells and mortality of transfusion (through different tail veins), the presence of the fresh RBCs recipients. Clinical studies of the effect of blood ity of the stored RBCs. However, should such biology exist in human transfusion, 8. Effects of red blood cell storage in it further complicates trials in which groups receive an age range of heavily transfused patients. For ethical concerns, groups are often established that 204-207.