Abstract 15323: How Often Should Chest Compressions be Paused to Assess the Cardiac Rhythm? A Systematic Review and Meta-analysis

Circulation ◽  
2015 ◽  
Vol 132 (suppl_3) ◽  
Author(s):  
Joshua C Reynolds ◽  
Violetta Raffay ◽  
Eddy Lang ◽  
Peter T Morley ◽  
Kevin Nation
Keyword(s):  
Systematic Review ◽  
Cardiac Rhythm ◽  
Observational Studies ◽  
Meta Analysis ◽  
Chest Compressions ◽  
Quality Of Evidence ◽  
Rhythm Analysis ◽  
Meta Analyses ◽  
Quality Evidence

Objectives: Most guidelines recommend pausing chest compressions at 2-min intervals to analyze the cardiac rhythm. We assessed the literature on the optimal interval at which to pause chest compressions in adults for cardiac rhythm analysis in any setting. Methods: To conduct this systematic review and meta-analysis, we searched PubMed, Embase, and Cochrane databases through January 2, 2015, including human studies addressing any two different intervals of rhythm analysis. We excluded animal studies, manikin studies, case reports, editorials, and studies published only in abstract form. We assessed for bias per the Cochrane Handbook criteria for randomized controlled trials (RCT) and observational studies, then used GRADE methodology to evaluate the quality of evidence for functional outcome, survival, and return of spontaneous circulation. Two reviewers independently screened titles/abstracts, and resolved disagreement by consensus. We summarized study results using RR for RCTs and OR for observational studies. Meta-analyses were performed with Mantel-Haenszel random effects model. Results: Of 1,135 papers identified, 8 were included (3 RCT and 5 observational studies) encompassing 15,242 subjects. Quality of evidence was very low or low (downgraded for risk of bias and indirectness). RCT comparing specific time intervals (3-minutes vs. immediate analysis; 1-minute vs. 2-minutes; 3-minutes vs. 1-minute) demonstrated no benefit in either arm. Meta-analyses of 5 observational studies demonstrated moderate pooled benefit of a bundled ‘minimally interrupted chest compression’ protocol dictating 200-compression intervals over historical controls treated with 1- or 3-minute intervals per the 2000 guidelines (ROSC: OR 1.9, 95% CI 1.3, 2.7; survival to discharge: OR 2.9, 95% CI 2.1, 3.8; good functional outcome: OR 2.9, 95% CI 1.6, 5.4). No pooled estimate had significant heterogeneity. Conclusion: We found no quality evidence to support pausing chest compressions at any singular interval to assess the cardiac rhythm in adults in cardiac arrest in any setting. Very low quality evidence suggests improved outcomes in patients receiving a bundled 200-compression interval protocol compared to 1- or 3-minute intervals.

scholarly journals Effectiveness of e-cigarettes in smoking cessation: a systematic review and meta-analysis

2020 ◽  
Vol 30 (Supplement_5) ◽  
Author(s):  
M Oberndorfer ◽  
I Grabovac ◽  
S Haider ◽  
T E Dorner
Keyword(s):  
Systematic Review ◽  
Smoking Cessation ◽  
Meta Analysis ◽  
Current Evidence ◽  
Promising Alternative ◽  
Quality Of Evidence ◽  
Different Populations ◽  
Meta Analyses

Abstract Background Reports of the effectiveness of e-cigarettes (ECs) for smoking cessation vary across different studies making implementation recommendations hard to attain. We performed a systematic review and meta-analysis to synthesise the current evidence regarding the effectiveness of ECs for smoking cessation. Methods PubMed, PsycInfo and Embase databases were searched for randomized controlled trials comparing nicotine ECs with non-nicotine ECs or with established smoking cessation interventions (nicotine replacement therapy (NRT) and or counselling) published between 01/01/2014 and 01/05/2019. Data from eligible studies were extracted and used for random-effects meta-analyses. Results Our literature review yielded 13190 publications with 10 studies being identified as eligible for systematic review, covering 8362 participants, and 8 for meta-analyses (n = 30 - 6006). Using the last follow-up of eligible studies, the proportion of smokers achieving abstinence was 1.67 [95CI:0.99 - 2.81] times higher in nicotine EC users compared to non-nicotine EC users. The proportion of abstinent smokers was 1.69 [95CI:1.25 - 2.27] times higher in EC users compared to participants receiving NRT. EC users showed a 2.70 [95CI:1.15 - 6.30] times higher proportion of abstinent smokers in comparison to participants solely receiving counselling. Conclusions Our analysis showed modest effects of nicotine-ECs compared to non-nicotine ECs. When compared to NRT or counselling, results suggest that nicotine EC may be more effective for smoking cessation. As ECs also help maintaining routinized behaviour and social aspects of smoking, we hypothesise that this may explain their advantage as a tool for smoking cessation. However, given the small number of included studies, different populations, heterogeneous designs, and the overall moderate to low quality of evidence, it is not possible to offer clear recommendations. More comparable data is needed to strengthen confidence in the quality of evidence. Key messages The number of previous studies assessing the effectiveness of ECs for smoking cessation is limited. Further, comparability of these studies is restricted, weakening the quality of evidence. Although current evidence on the effectiveness of ECs for smoking cessation is inconclusive, our meta-analyses suggest that ECs could be a promising alternative tool in attempts to achieve abstinence.

The effectiveness of serious games in improving memory among elderly people with cognitive impairment: A systematic review and meta-analysis (Preprint)

2021 ◽  
Author(s):  
Alaa Abd-alrazaq ◽  
Dari Alhuwail ◽  
Eiman Al-Jafar ◽  
Arfan Ahmed ◽  
Shuja Mohd Reagu ◽  
...  
Keyword(s):  
Systematic Review ◽  
Working Memory ◽  
Cognitive Impairment ◽  
Verbal Memory ◽  
Serious Games ◽  
Meta Analysis ◽  
The Elderly ◽  
Quality Of Evidence ◽  
Meta Analyses

BACKGROUND Memory, one of the main cognitive functions, is known to decline by age. Serious games have been used for improving memory among the elderly. The effectiveness of serious games in improving memory has been investigated by several systematic reviews; however, they are limited by design and methodological weaknesses. OBJECTIVE This study aims to assess the effectiveness of serious games in improving memory among the elderly with cognitive impairment. METHODS A systematic review of randomized controlled trials (RCTs) was carried out. The search sources included searching 8 databases, screening reference lists of the included studies and relevant reviews, and checking studies that cited the included studies. Two reviewers independently carried out the study selection, data extraction, risk of bias assessment, and quality of evidence appraisal. Extracted data were synthesized using a narrative approach and a statistical approach (i.e., meta-analysis), as appropriate. RESULTS Out of 466 citations retrieved, 18 studies met the eligibility criteria of this review. Of those, 15 RCTs were eventually included in 10 meta-analyses. We found that serious games are more effective than no or passive interventions in improving non-verbal memory (P=0.002) and working memory (P=0.02), but not verbal memory (P=0.13). The review also showed that serious games are more effective than conventional exercises in improving verbal memory (P=0.004), but not for non-verbal memory (P=0.12) and working memory (P=0.49). Serious games were as effective as conventional cognitive activities in improving verbal memory (P=0.07), non-verbal memory (P=0.94), and working memory (P=0.08) among the elderly with cognitive impairment. Lastly, the effect of adaptive serious games on working memory was comparable to non-adaptive serious games (P=0.08). CONCLUSIONS Serious games have the potential to improve verbal, non-verbal, and working memory among elderly people with cognitive impairment. However, our findings should be interpreted cautiously given that most meta-analyses were based on a few studies (≤3) and judged to have a low quality of evidence. Therefore, serious games should be offered as supplemental to existing proven and safe interventions, rather than a complete substitute until further, more robust evidence is available. Future studies should investigate the short and long-term effects of serious games on memory and other cognitive abilities among people from different age groups with or without cognitive impairment.

scholarly journals Effectiveness of Electronic Cigarettes in Smoking Cessation: A Systematic Review and Meta-analysis

2020 ◽  
Author(s):  
Igor Grabovac ◽  
Moritz Oberndorfer ◽  
Jismy Fischer ◽  
Winfried Wiesinger ◽  
Sandra Haider ◽  
...  
Keyword(s):  
Systematic Review ◽  
Smoking Cessation ◽  
Random Effects ◽  
Electronic Cigarettes ◽  
Meta Analysis ◽  
Current Evidence ◽  
Quality Of Evidence ◽  
Registration Number ◽  
Meta Analyses

Abstract Introduction Reports of the effectiveness of e-cigarettes (ECs) for smoking cessation vary across different studies making implementation recommendations hard to attain. We performed a systematic review and meta-analysis to assess the current evidence regarding effectiveness of ECs for smoking cessation. Methods PubMed, PsycInfo, and Embase databases were searched for randomized controlled trials comparing nicotine ECs with non-nicotine ECs or with established smoking cessation interventions (nicotine replacement therapy [NRT] and or counseling) published between 1 January 2014 and 27 June 2020. Data from eligible studies were extracted and used for random-effects meta-analyses (PROSPERO registration number: CRD42019141414). Results The search yielded 13 950 publications with 12 studies being identified as eligible for systematic review (N = 8362) and 9 studies for random-effects meta-analyses (range: 30–6006 participants). The proportion of smokers achieving abstinence was 1.71 (95 CI: 1.02–2.84) times higher in nicotine EC users compared with non-nicotine EC users. The proportion of abstinent smokers was 1.69 (95 CI: 1.25–2.27) times higher in EC users compared with participants receiving NRT. EC users showed a 2.04 (95 CI: 0.90–4.64) times higher proportion of abstinent smokers in comparison with participants solely receiving counseling. Conclusions Our results suggest that nicotine ECs may be more effective in smoking cessation when compared with placebo ECs or NRT. When compared with counseling alone, nicotine ECs are more effective short term, but its effectiveness appears to diminish with later follow-ups. Given the small number of studies, heterogeneous design, and the overall moderate to low quality of evidence, it is not possible to offer clear recommendations. Implications The results of this study do not allow for a conclusive argument. However, pooling current evidence points toward a potential for ECs as a smoking cessation tool. Though, given the overall quality of evidence, future studies should aim for more clarity in terms of interventions and larger study populations.

scholarly journals Evidence-Based Medicine, Systematic Reviews, and Guidelines in Interventional Pain Management: Part 6. Systematic Reviews and Meta-Analyses of Observational Studies

2008 ◽  
Vol 5;12 (5;9) ◽  
pp. 819-850
Author(s):  
Laxmaiah Manchikanti
Keyword(s):  
Systematic Review ◽  
Systematic Reviews ◽  
Evidence Based Medicine ◽  
Observational Studies ◽  
Meta Analysis ◽  
Evidence Based ◽  
Confounding Bias ◽  
Meta Analyses ◽  
Based Medicine

Observational studies provide an important source of information when randomized controlled trials (RCTs) cannot or should not be undertaken, provided that the data are analyzed and interpreted with special attention to bias. Evidence-based medicine (EBM) stresses the examination of evidence from clinical research and describes it as a shift in medical paradigm, in contrast to intuition, unsystematic clinical experience, and pathophysiologic rationale. While the importance of randomized trials has been created by the concept of the hierarchy of evidence in guiding therapy, much of the medical research is observational. The reporting of observational research is often not detailed and clear enough with insufficient quality and poor reporting, which hampers the assessment of strengths and weaknesses of the study and the generalizability of the mixed results. Thus, in recent years, progress and innovations in health care are measured by systematic reviews and meta-analyses. A systematic review is defined as, “the application of scientific strategies that limit bias by the systematic assembly, clinical appraisal, and synthesis of all relevant studies on a specific topic.” Meta-analysis usually is the final step in a systematic review. Systematic reviews and meta-analyses are labor intensive, requiring expertise in both the subject matter and review methodology, and also must follow the rules of EBM which suggests that a formal set of rules must complement medical training and common sense for clinicians to integrate the results of clinical research effectively. While expertise in the review methods is important, the expertise in the subject matter and technical components is also crucial. Even though, systematic reviews and meta-analyses, specifically of RCTs, have exploded, the quality of the systematic reviews is highly variable and consequently, the opinions reached of the same studies are quite divergent. Numerous deficiencies have been described in methodologic assessment of the quality of the individual articles. Consequently, observational studies can provide an important complementary source of information, provided that the data are analyzed and interpreted in the context of confounding bias to which they are prone. Appropriate systematic reviews of observational studies, in conjunction with RCTs, may provide the basis for elimination of a dangerous discrepancy between the experts and the evidence. Steps in conducting systematic reviews of observational studies include planning, conducting, reporting, and disseminating the results. MOOSE, or Meta-analysis of Observational Studies in Epidemiology, a proposal for reporting contains specifications including background, search strategy, methods, results, discussion, and conclusion. Use of the MOOSE checklist should improve the usefulness of meta-analysis for authors, reviewers, editors, readers, and decision-makers. This manuscript describes systematic reviews and meta-analyses of observational studies. Authors frequently utilize RCTs and observational studies in one systematic review; thus, they should also follow the reporting standards of the Quality of Reporting of Meta-analysis (QUOROM) statement, which also provides a checklist. A combined approach of QUOROM and MOOSE will improve reporting of systematic reviews and lead to progress and innovations in health care. Key words: Observational studies, evidence-based medicine, systematic reviews, metaanalysis, randomized trials, case-control studies, cross-sectional studies, cohort studies, confounding bias, QUOROM, MOOSE

Pre-emptive epidural analgesia for acute and chronic post-thoracotomy pain in adults: a systematic review and meta-analysis

2020 ◽  
Vol 45 (12) ◽  
pp. 1006-1016
Author(s):  
Sun-Kyung Park ◽  
Susie Yoon ◽  
Bo Rim Kim ◽  
Suk Hyung Choe ◽  
Jae-Hyon Bahk ◽  
...  
Keyword(s):  
Systematic Review ◽  
Epidural Analgesia ◽  
Pain Intensity ◽  
Meta Analysis ◽  
Control Group ◽  
Quality Of Evidence ◽  
Grade Method ◽  
Meta Analyses ◽  
Thoracotomy Incision

Background and objectivesEpidural analgesia is the gold standard for post-thoracotomy pain management and can be started before or after surgical incision. This systematic review and meta-analysis investigated whether pre-emptive epidural analgesia before thoracotomy incision reduces acute and chronic post-thoracotomy pain in adults compared with epidural analgesia after incision.MethodsWe searched databases including MEDLINE, Embase, and CENTRAL for randomized controlled trials comparing epidural analgesia initiated before (pre-emptive group) and after (control group) thoracotomy incision in adults. The primary outcomes were the pain intensity during rest and coughing within 72 hours after surgery and the incidence of pain 1 to 6 months after surgery. Data were combined with random-effects meta-analyses. We rated the quality of evidence as high, moderate, low, and very low using the Grading of Recommendations, Assessment, Development and Evaluation (GRADE) method.ResultsWe included 19 trials with 1062 participants involving 529 in the pre-emptive group and 533 in the control group. The pain intensity was significantly lower at rest within 72 hours after surgery (19 studies, n=1062) and during coughing within 48 hours after surgery (11 studies, n=638), and the incidence of pain was significantly lower 1 to 6 months after surgery (6 studies, n=276) in the pre-emptive group than in the control group. The quality of evidence was moderate or low in the primary outcomes.ConclusionsOur review provides low-quality evidence that pre-emptive epidural analgesia reduces the intensity of acute pain and the incidence of chronic pain after thoracotomy in adults.Protocol registration numberCRD42019131620.

scholarly journals Effects of Iodized Salt and Iodine Supplements on Prenatal and Postnatal Growth: A Systematic Review

2018 ◽  
Vol 9 (3) ◽  
pp. 219-237 ◽  
Author(s):  
Jessica Farebrother ◽  
Celeste E Naude ◽  
Liesl Nicol ◽  
Zhongna Sang ◽  
Zhenyu Yang ◽  
...  
Keyword(s):  
Systematic Review ◽  
Growth Factor ◽  
Pregnant Women ◽  
Iodine Deficiency ◽  
Postnatal Growth ◽  
Quality Of Evidence ◽  
Growth Outcomes ◽  
Meta Analyses ◽  
Quality Evidence

Abstract Hypothyroidism due to iodine deficiency can impair physical development, most visibly in the marked stunting of myxedematous cretinism caused by severe in utero iodine deficiency. Whether iodine repletion improves growth in noncretinous children is uncertain. Therefore, the aim of our systematic review was to assess the effects of iodine fortification or supplementation on prenatal and postnatal growth outcomes in noncretinous children. Following Cochrane methods and PRISMA (Preferred Reporting Items for Systematic Reviews and Meta-Analyses) reporting guidelines, we searched 10 databases including 2 Chinese databases (latest search February 2017). We included randomized and nonrandomized controlled trials (RCTs; non-RCTs), controlled before-after (CBA) studies, and interrupted time-series studies in pregnant women and children (≤18 y), which compared the effects of iodine (any form, dose, regimen) to placebo, noniodized salt, or no intervention on prenatal and postnatal growth outcomes. We calculated mean differences with 95% CIs, performed random-effects meta-analyses, and assessed the quality of evidence with the use of GRADE (Grading of Recommendations Assessment, Development and Evaluation). We included 18 studies (13 RCTs, 4 non-RCTs, 1 CBA) (n = 5729). Iodine supplementation of severely iodine-deficient pregnant women increased mean birthweight [mean difference (MD): 200 g; 95% CI: 183, 217 g; n = 635; 2 non-RCTs] compared to controls, but the quality of this evidence was assessed as very low. Iodine repletion across the other groups showed no effects on primary growth outcomes (quality of evidence mostly low and very low). Meta-analyses showed a positive effect in moderate-to-mildly iodine-deficient schoolchildren on insulin-like growth factor-1 (MD: 38.48 ng/mL; 95% CI: 6.19, 70.76 ng/mL; n = 498; 2 RCTs, low-quality evidence) and insulin-like growth factor binding protein-3 (MD: 0.46 μg/mL; 95% CI: 0.25, 0.66 μg/mL; n = 498; 2 RCTs, low-quality evidence). In conclusion, we identified few well-designed trials examining the effects of iodine repletion on growth. We are uncertain whether prenatal iodine repletion increases infant growth. Postnatal iodine repletion may improve growth factors but has no clear effects on somatic growth. Our systematic review was registered with PROSPERO as CRD42014012940.

Can exposure to panoramic radiographs induce genotoxic effects on the oral epithelium? A systematic review with meta-analysis

2021 ◽  
pp. 20210149
Author(s):  
Marcos Antônio Lima dos Santos ◽  
Graziane Ribeiro Couto ◽  
Mark Jon Santana Sabey ◽  
Danilo de Paula Ribeiro Borges ◽  
Wilton Mitsunari Takeshita
Keyword(s):  
Systematic Review ◽  
Observational Studies ◽  
Meta Analysis ◽  
P Value ◽  
Oral Epithelium ◽  
Genotoxic Effects ◽  
Quality Of Evidence ◽  
Panoramic Radiographs ◽  
Small Effect Size

Radiographic examinations combined with clinical and histological tests play an important role in diagnosing changes in the craniofacial region. Considering that X-radiation is a form of ionizing energy capable of damaging the DNA of individuals, it has been the object of studies since its introduction. The micronucleus test is used to quantify this damage, assessing whether or not chromosomal breakage occurs. Objective: To evaluate, through a systematic review (SR) with meta-analysis, the occurrence of genotoxic effects in the oral epithelium after the exposure of patients to panoramic radiographs. Methods: An SR was performed with the PICOS (Population, Intervention, Comparison, Outcome, and Study design) strategy, aiming to answer the following question: “Can panoramic radiographs induce genotoxic effects on the oral epithelium?” The study was registered in the PROSPERO (International prospective register of systematic reviews) platform. A systematic search was performed in the following electronic databases: PubMed (including MedLine), Scopus, Embase, LILACS, Medline EbscoHost, and Google Scholar. Treatment effects were defined as standardized mean difference (SMD), and 95% confidence intervals (CI) were established. The Joanna Briggs Institute questionnaire for observational studies was applied to assess the risk of bias. The GRADE tool was used to assess the quality of evidence of the SR. Results: A total of 251 potentially relevant studies were selected through the search strategy. After screening titles and abstracts, 11 full-text manuscripts were assessed for eligibility and nine observational studies were included in the meta-analysis. The present study showed an increase in micronuclei after the exposure (SMD = 0.21, 95% CI, 0.03 to 0.28, p = 0.02), with a Tau2index = 0.00, Chi2 = 2.35, and p-value = 0.97. Therefore, the articles selected were considered homogeneous and the I² of 0% indicated low heterogeneity. Conclusion: According to the studies analysed, although the quality of evidence was considered low, panoramic radiographs can cause genotoxic damage in the oral epithelium but with a small effect size.

Antiplatelet Therapy versus Anticoagulation after Surgical Bioprosthetic Aortic Valve Replacement: A Systematic Review and Meta-Analysis

2019 ◽  
Vol 119 (02) ◽  
pp. 328-339 ◽  
Author(s):  
Kevin An ◽  
Emilie Belley-Cote ◽  
Kevin Um ◽  
Saurabh Gupta ◽  
Graham McClure ◽  
...  
Keyword(s):  
Systematic Review ◽  
Aortic Valve ◽  
Aortic Valve Replacement ◽  
Antiplatelet Therapy ◽  
Valve Replacement ◽  
Observational Studies ◽  
Meta Analysis ◽  
Significant Difference ◽  
Quality Evidence

Background The optimal antithrombotic therapy after surgical bioprosthetic aortic valve replacement (BAVR) is uncertain. We conducted a systematic review and meta-analysis of observational studies and randomized controlled trials (RCTs) comparing antiplatelet therapy and anticoagulation in patients with surgical BAVR. Methods We searched Cochrane CENTRAL, MEDLINE and EMBASE from inception to 3 November 2017 for studies evaluating antiplatelet therapy versus anticoagulation early after surgical BAVR. We performed title and abstract screening, full-text review, risk of bias evaluation and data collection independently and in duplicate. We evaluated overall quality of evidence using the Grading of Recommendations Assessment, Development and Evaluation framework, and pooled data using a random effects model. Results We identified 2 RCTs (n = 397) and 5 observational studies (n = 2,012) meeting our eligibility criteria. The mean follow-up for all outcomes was 3 months in RCTs, and 10 months for observational studies. Antiplatelet compared with anticoagulant therapy demonstrated a trend towards fewer major bleeds in RCTs (relative risk [RR], 0.34; 95% confidence interval [CI], 0.11–1.04, p = 0.06, I 2 = 0%, low quality evidence), and significantly fewer major bleeds in observational studies (RR, 0.34; 95% CI, 0.20–0.58, p ≤ 0.0001, I 2 = 0%, very low quality evidence), but stroke, thromboembolism and mortality did not show a significant difference in either RCTs or observational studies. Conclusion Antiplatelet therapy demonstrated reduced bleeding risk with no negative effects on stroke, thromboembolism or mortality compared with anticoagulation therapy after surgical BAVR. Our confidence in the results is reduced by the low quality of the available evidence.

scholarly journals Why physiology will continue to guide the choice between balanced crystalloids and normal saline: a systematic review and meta-analysis

Critical Care ◽  
2019 ◽  
Vol 23 (1) ◽  
Author(s):  
Charlotte L. Zwager ◽  
Pieter Roel Tuinman ◽  
Harm-Jan de Grooth ◽  
Jos Kooter ◽  
Hans Ket ◽  
...  
Keyword(s):  
Systematic Review ◽  
Normal Saline ◽  
Meta Analysis ◽  
Quality Of Evidence ◽  
The Right ◽  
Meta Analyses ◽  
Sequential Analyses ◽  
Balanced Crystalloids

Abstract Background Crystalloids are the most frequently prescribed drugs in intensive care medicine and emergency medicine. Thus, even small differences in outcome may have major implications, and therefore, the choice between balanced crystalloids versus normal saline continues to be debated. We examined to what extent the currently accrued information size from completed and ongoing trials on the subject allow intensivists and emergency physicians to choose the right fluid for their patients. Methods Systematic review and meta-analysis with random effects inverse variance model. Published randomized controlled trials enrolling adult patients to compare balanced crystalloids versus normal saline in the setting of intensive care medicine or emergency medicine were included. The main outcome was mortality at the longest follow-up, and secondary outcomes were moderate to severe acute kidney injury (AKI) and initiation of renal replacement therapy (RRT). Trial sequential analyses (TSA) were performed, and risk of bias and overall quality of evidence were assessed. Additionally, previously published meta-analyses, trial sequential analyses and ongoing large trials were analysed for included studies, required information size calculations and the assumptions underlying those calculations. Results Nine studies (n = 32,777) were included. Of those, eight had data available on mortality, seven on AKI and six on RRT. Meta-analysis showed no significant differences between balanced crystalloids versus normal saline for mortality (P = 0.33), the incidence of moderate to severe AKI (P = 0.37) or initiation of RRT (P = 0.29). Quality of evidence was low to very low. Analysis of previous meta-analyses and ongoing trials showed large differences in calculated required versus accrued information sizes and assumptions underlying those. TSA revealed the need for extremely large trials based on our realistic and clinically relevant assumptions on relative risk reduction and baseline mortality. Conclusions Our meta-analysis could not find significant differences between balanced crystalloids and normal saline on mortality at the longest follow-up, moderate to severe AKI or new RRT. Currently accrued information size is smaller, and the required information size is larger than previously anticipated. Therefore, completed and ongoing trials on the topic may fail to provide adequate guidance for choosing the right crystalloid. Thus, physiology will continue to play an important role for individualizing this choice.

Ondansetron reduces the incidence of hypotension after spinal anaesthesia in non-caesarean delivery: A systematic review and meta-analysis

2021 ◽  
pp. 175045892096415
Author(s):  
Tito D Tubog ◽  
Richard S Bramble
Keyword(s):  
Systematic Review ◽  
Arterial Pressure ◽  
Spinal Anaesthesia ◽  
Caesarean Delivery ◽  
Meta Analysis ◽  
Systolic Arterial Pressure ◽  
Incidence Rates ◽  
Induced Hypotension ◽  
Quality Of Evidence

The incidence rates of spinal anaesthesia-induced hypotension vary depending on the surgical procedures. This systematic review and meta-analysis evaluates the efficacy of prophylactic ondansetron in reducing the incidence of spinal anaesthesia-induced hypotension in non-caesarean delivery. Thirteen trials consisting of 1166 patients were included for analysis. Compared to placebo, there is a low quality of evidence that ondansetron was effective in reducing the incidence of spinal anaesthesia-induced hypotension (RR 0.62, 95% CI 0.44 to 0.87; p = 0.005) and bradycardia (RR 0.54, 95% CI 0.32 to 0.90; p = 0.02). We also found a moderate quality of evidence that ondansetron lowered the number of rescue ephedrine (RR 0.61, 95% CI 0.43 to 0.87; p = 0.007). Patients treated with ondansetron have higher mean arterial pressure 15 to 20 minutes after spinal anaesthesia induction and higher systolic arterial pressure 5, 10, 15 and 20 minutes after spinal anaesthesia. The evidence suggests that prophylactic administration of ondansetron results in the reduction of the incidence of spinal anaesthesia-induced hypotension, bradycardia and rescue ephedrine in patients undergoing non-caesarean delivery under spinal anaesthesia.

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