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Teng TZJ, Chia AZQ, Gan KF, Tan LHP, Wang Y, Charn TC. A Comparison of Tranexamic Acid in Nasal Versus Sinus Surgeries: a Systematic Review and Meta-Analysis. Indian J Otolaryngol Head Neck Surg 2024; 76:3018-3030. [PMID: 39130301 PMCID: PMC11306473 DOI: 10.1007/s12070-024-04579-x] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/19/2024] [Accepted: 02/22/2024] [Indexed: 08/13/2024] Open
Abstract
Nasal surgeries (e.g.: rhinoplasties, septoplasties) and sinus surgeries (e.g.: Functional Endoscopic Sinus Surgeries) are common procedures in Otorhinolaryngology. Tranexamic acid (TXA), an antifibrinolytic drug, has been increasingly utilized to reduce hemorrhage recently. While close in proximity anatomically, the bleeding nature of sinus and nasal surgeries may differ. We present the first meta-analysis that has reviewed both nasal and sinus surgery collectively and compares the two. Pubmed, Embase, Cochrane Library and WoS were searched until April 2023. Outcomes of interest include Boezart Scoring, clotting time, postoperative complications and surgical field quality. 27 Studies were assessed, of which 25 studies were evaluated quantitatively. Of the 27 studies, 15 studies involved Sinus surgery while 12 involved Nasal surgery. The use of tranexamic acid was notably beneficial in the evaluation of blood loss, reduction of operating time, surgical field quality and surgeon satisfaction. TXA has proven to be efficacious in both nasal and sinus surgeries to varying degrees. TXA has more effects in sinus surgeries compared to nasal surgeries in objective markers such as reducing blood loss and operating time, but the converse occurs for subjective markers such as surgeon satisfaction scores. Supplementary Information The online version contains supplementary material available at 10.1007/s12070-024-04579-x.
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Affiliation(s)
- Thomas Zheng Jie Teng
- Ministry of Health Holdings, Singapore, Singapore
- Department of Otorhinolaryngology - Head and Neck surgery, Sengkang General Hospital, Singhealth, Singapore
| | | | - Keith Fei Gan
- Yong Loo Lin School of Medicine, National University of Singapore (NUS), Singapore, Singapore
| | - Lydia Hui Peng Tan
- Yong Loo Lin School of Medicine, National University of Singapore (NUS), Singapore, Singapore
| | - Yuxing Wang
- Ministry of Health Holdings, Singapore, Singapore
| | - Tze Choong Charn
- Department of Otorhinolaryngology - Head and Neck surgery, Sengkang General Hospital, Singhealth, Singapore
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Goncalves PE, Ferreira FJS, Lima AS, Moreira DC, de Oliveira Santos BF, Melo NAD, Beer-Furlan A, Oliveira AMP. Tranexamic acid in bleeding reduction and operative time of nasal surgeries: systematic review and meta-analysis. Eur Arch Otorhinolaryngol 2024; 281:1105-1114. [PMID: 37864748 DOI: 10.1007/s00405-023-08291-4] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/09/2023] [Accepted: 10/10/2023] [Indexed: 10/23/2023]
Abstract
PURPOSE Our study goal is to review the efficacy of tranexamic acid in reducing blood loss and operative time in nasal surgeries. METHODS We included randomized clinical trials using oral or intravenous tranexamic acid, excluded non-randomized studies, topic administration, coagulopathy, and using other drugs interfering in the coagulation cascade. Online databases, National Library of Medicine (MEDLINE-PubMED), Latin American and Caribbean Literature on Health Sciences (Lilacs), Cochrane Library, Embase and Google Scholar were used to perform the search. The review was registered in PROSPERO by no CRD42022310977. Two authors, independently, selected the articles meeting the inclusion criteria. They extracted the data and used RevMan 5 software to perform the meta-analysis. RESULTS Our search resulted in 16 RCTs that were included in the meta-analysis totalizing 1108 patients. Studies were evaluated resulting in a low risk of bias for the five domains. The use of tranexamic acid resulted in significant reduction in duration of surgery (DOS) and intraoperative blood loss (IBL) had significant reduction. The level of evidence according to GRADE System was high in all studies and variables. CONCLUSION Tranexamic acid has an important role in reducing intraoperative blood loss and duration of surgery. Our study has some limitations due to the low number of RCTs available in the literature.
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Affiliation(s)
- Paulo Eduardo Goncalves
- Department of Medicine, Federal University of Sergipe, Claudio Batista St, Aracaju, SE, 49060-100, Brazil.
| | | | - Alice Santos Lima
- Department of Medicine, Federal University of Sergipe, Claudio Batista St, Aracaju, SE, 49060-100, Brazil
| | - Dandara Carvalho Moreira
- Department of Neurosurgery, Hospital de Cirurgia, 174, Desembargador Maynard, Cirurgia, Aracaju, SE, Brazil
| | | | - Nelson Almeida D'Avila Melo
- Department of Otolaryngology, Tiradentes University, 300, Murilo Dantas Avenue, Farolândia, Aracaju, SE, Brazil
| | - André Beer-Furlan
- Department of Skull Base and Endovascular Surgery, Moffitt Cancer Center, 12902 USF Magnolia Drive, Tampa, FL, USA
| | - Arthur Maynart Pereira Oliveira
- Department of Medicine, Federal University of Sergipe, Claudio Batista St, Aracaju, SE, 49060-100, Brazil
- Department of Neurosurgery, Hospital de Cirurgia, 174, Desembargador Maynard, Cirurgia, Aracaju, SE, Brazil
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Abdallah Z, Staibano P, Zhou K, Khalife S, Nguyen TBV, Sommer DD. Tranexamic acid in endoscopic sinus and skull base surgery: A systematic review and meta-analysis. Int Forum Allergy Rhinol 2023; 13:2187-2204. [PMID: 37259887 DOI: 10.1002/alr.23203] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/06/2023] [Revised: 04/24/2023] [Accepted: 05/26/2023] [Indexed: 06/02/2023]
Abstract
OBJECTIVE Endoscopic sinus surgery (ESS) and endoscopic skull base surgery (ESBS) approaches have revolutionized the management of sinonasal and intracranial pathology. Maintaining surgical hemostasis is essential as bleeding can obscure the visibility of the surgical field, thus increasing surgical duration, risk of complications, and procedural failure. Tranexamic acid (TXA) acts to reduce bleeding by inhibiting fibrin degradation. This review aims to assess whether TXA improves surgical field quality and reduces intraoperative blood loss compared with control. METHODS We searched PubMed, MEDLINE, Embase, Web of Science, and Cochrane Library from inception until September 1, 2022. Two reviewers independently screened citations, extracted data, and assessed methodological quality using the Cochrane risk-of-bias tool for randomized trials. Data were pooled using a random-effect model, with continuous data presented as mean differences and dichotomous data presented as odds ratios. RESULTS Seventeen ESS randomized controlled trials (n = 1377) and one ESBS randomized controlled trial (n = 50) were reviewed. Significant improvement in surgical field quality was achieved with both systemic TXA (six studies, p < 0.00001) and topical TXA (six studies, p = 0.01) compared with the control. Systemic TXA (eight studies) and topical TXA (three studies) both achieved a significant reduction in intraoperative blood loss compared with the control (p < 0.00001). There were significant differences in operative times (p < 0.001) but no significant difference in perioperative outcomes (p = 0.30). CONCLUSION This meta-analysis demonstrated that the administration of TXA in ESS can improve surgical field quality and reduce intraoperative blood loss. TXA use did not result in increased perioperative complications including thrombotic events.
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Affiliation(s)
- Zahra Abdallah
- Michael G. DeGroote School of Medicine, McMaster University, Hamilton, Ontario, Canada
| | - Phillip Staibano
- Department of Surgery, Division of Otolaryngology, Head & Neck Surgery, McMaster University, Hamilton, Ontario, Canada
| | - Kelvin Zhou
- Department of Surgery, Division of Otolaryngology, Head & Neck Surgery, McMaster University, Hamilton, Ontario, Canada
| | - Sarah Khalife
- Department of Surgery, Division of Otolaryngology, Head & Neck Surgery, McMaster University, Hamilton, Ontario, Canada
| | - Thomas B V Nguyen
- Department of Surgery, Division of Otolaryngology, Head & Neck Surgery, McMaster University, Hamilton, Ontario, Canada
| | - Doron D Sommer
- Department of Surgery, Division of Otolaryngology, Head & Neck Surgery, McMaster University, Hamilton, Ontario, Canada
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Khanwalkar A, Chan E, Roozdar P, Kim D, Ma Y, Hwang PH, Nayak JV, Patel ZM. Tranexamic acid does not significantly lower postoperative bleeding after endoscopic sinus and nasal surgery. Int Forum Allergy Rhinol 2023; 13:1584-1591. [PMID: 36608352 DOI: 10.1002/alr.23127] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/06/2022] [Revised: 12/05/2022] [Accepted: 12/20/2022] [Indexed: 01/07/2023]
Abstract
BACKGROUND Postoperative epistaxis is a known possibility following endoscopic sinonasal surgery. Tranexamic acid (TXA) has been shown to reduce intraoperative blood loss and improve the visual field. This study evaluated the clinical efficacy of TXA when given at end of surgery to reduce postoperative bleeding. METHODS This randomized, double-blinded placebo-controlled trial was conducted from April to November 2021. Patients scheduled to undergo endoscopic sinus or nasal surgery were randomized to receive an intravenous dose of 1 g TXA or saline intraoperatively prior to extubation. A 10-in. visual analog scale (VAS) was used to query patients regarding postoperative bleeding each day for 1 week. The medical record was examined to determine the need for additional evaluations or interventions for epistaxis. RESULTS Forty patients completed the study. The mean ± SD postoperative bleeding VAS for the TXA group on the day of surgery was not significantly different from the saline group (4.82 ± 2.18 in. vs. 5.03 ± 2.14 in., p = 0.8). There were no significant differences between treatment arms on any postoperative day through day 7 (0.67 ± 1.84 in. vs. 0.87 ± 0.99 in., p = 0.7), nor in the reduction in VAS compared to the respective baseline on the day of surgery. There were no significant differences in terms of additional interventions (e.g., additional evaluation in recovery, ED, or clinic, need for packing, or return to the operating room [OR]). CONCLUSION Although TXA has previously demonstrated efficacy to reduce intraoperative bleeding during sinonasal surgery, when postoperative bleeding is already minimal at baseline, TXA does not appear to reduce it significantly further.
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Affiliation(s)
- Ashoke Khanwalkar
- Department of Otolaryngology, Head and Neck Surgery, University of Colorado Anschutz School of Medicine, Aurora, Colorado, USA
| | - Erik Chan
- Department of Otolaryngology, Head and Neck Surgery, Stanford University School of Medicine, Stanford, California, USA
| | - Pooya Roozdar
- Department of Otolaryngology, Head and Neck Surgery, Stanford University School of Medicine, Stanford, California, USA
| | - Dayoung Kim
- Department of Otolaryngology, Head and Neck Surgery, Stanford University School of Medicine, Stanford, California, USA
| | - Yifei Ma
- Department of Otolaryngology, Head and Neck Surgery, Stanford University School of Medicine, Stanford, California, USA
| | - Peter H Hwang
- Department of Otolaryngology, Head and Neck Surgery, Stanford University School of Medicine, Stanford, California, USA
| | - Jayakar V Nayak
- Department of Otolaryngology, Head and Neck Surgery, Stanford University School of Medicine, Stanford, California, USA
| | - Zara M Patel
- Department of Otolaryngology, Head and Neck Surgery, Stanford University School of Medicine, Stanford, California, USA
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Lourijsen E, Avdeeva K, Gan KL, Pundir V, Fokkens W. Tranexamic acid for the reduction of bleeding during functional endoscopic sinus surgery. Cochrane Database Syst Rev 2023; 2:CD012843. [PMID: 36808096 PMCID: PMC9943060 DOI: 10.1002/14651858.cd012843.pub2] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 02/23/2023]
Abstract
BACKGROUND Chronic rhinosinusitis, with or without nasal polyps, can have a major impact on a person's quality of life. Treatment is usually conservative and may include nasal saline, intranasal corticosteroids, antibiotics or systemic corticosteroids. If these treatments fail endoscopic sinus surgery can be considered. During surgery, visibility of the surgical field is important for the identification of important anatomic landmarks and structures that contribute to safety. Impaired visualisation can lead to complications during surgery, inability to complete the operation or a longer duration of surgery. Different methods are used to decrease intraoperative bleeding, including induced hypotension, topical or systemic vasoconstrictors or total intravenous anaesthesia. Another option is tranexamic acid, an antifibrinolytic agent, which can be administered topically or intravenously. OBJECTIVES To assess the effects of peri-operative tranexamic acid versus no therapy or placebo on operative parameters in patients with chronic rhinosinusitis (with or without nasal polyps) who are undergoing functional endoscopic sinus surgery (FESS). SEARCH METHODS The Cochrane ENT Information Specialist searched the Cochrane ENT Trials Register; Central Register of Controlled Trials (CENTRAL); Ovid MEDLINE; Ovid Embase; Web of Science; ClinicalTrials.gov; ICTRP and additional sources for published and unpublished trials. The date of the search was 10 February 2022. SELECTION CRITERIA Randomised controlled trials (RCTs) comparing intravenous, oral or topical tranexamic acid with no therapy or placebo in the treatment of patients (adults and children) with chronic rhinosinusitis, with or without nasal polyps, undergoing FESS. DATA COLLECTION AND ANALYSIS We used the standard methodological procedures expected by Cochrane. Primary outcome measures were surgical field bleeding score (e.g. Wormald or Boezaart grading system), intraoperative blood loss and significant adverse effects (seizures or thromboembolism within 12 weeks of surgery). Secondary outcomes were duration of surgery, incomplete surgery, surgical complications and postoperative bleeding (placing of packing or revision surgery) in the first two weeks after surgery. We performed subgroup analyses for methods of administration, different dosages, different forms of anaesthesia, use of thromboembolic prophylaxis and children versus adults. We evaluated each included study for risk of bias and used GRADE to assess the certainty of the evidence. MAIN RESULTS We included 14 studies in the review, with a total of 942 participants. Sample sizes in the included studies ranged from 10 to 170. All but two studies included adult patients (≥ 18 years). Two studies included children. Most studies had more male patients (range 46.6% to 80%). All studies were placebo-controlled and four studies had three treatment arms. Three studies investigated topical tranexamic acid; the other studies reported the use of intravenous tranexamic acid. For our primary outcome, surgical field bleeding score measured with the Boezaart or Wormald grading score, we pooled data from 13 studies. The pooled result demonstrated that tranexamic acid probably reduces the surgical field bleeding score, with a standardised mean difference (SMD) of -0.87 (95% confidence interval (CI) -1.23 to -0.51; 13 studies, 772 participants; moderate-certainty evidence). A SMD below -0.70 represents a large effect (in either direction). Tranexamic acid may result in a slight reduction in blood loss during surgery compared to placebo with a mean difference (MD) of -70.32 mL (95% CI -92.28 to -48.35 mL; 12 studies, 802 participants; low-certainty evidence). Tranexamic acid probably has little to no effect on the development of significant adverse events (seizures or thromboembolism) within 24 hours of surgery, with no events in either group and a risk difference (RD) of 0.00 (95% CI -0.02 to 0.02; 8 studies, 664 participants; moderate-certainty evidence). However, there were no studies reporting significant adverse event data with a longer duration of follow-up. Tranexamic acid probably results in little difference in the duration of surgery with a MD of -13.04 minutes (95% CI -19.27 to -6.81; 10 studies, 666 participants; moderate-certainty evidence). Tranexamic acid probably results in little to no difference in the incidence of incomplete surgery, with no events in either group and a RD of 0.00 (95% CI -0.09 to 0.09; 2 studies, 58 participants; moderate-certainty evidence) and likely results in little to no difference in surgical complications, again with no events in either group and a RD of 0.00 (95% CI -0.09 to 0.09; 2 studies, 58 participants; moderate-certainty evidence), although these numbers are too small to draw robust conclusions. Tranexamic acid may result in little to no difference in the likelihood of postoperative bleeding (placement of packing or revision surgery within three days of surgery) (RD -0.01, 95% CI -0.04 to 0.02; 6 studies, 404 participants; low-certainty evidence). There were no studies with longer follow-up. AUTHORS' CONCLUSIONS There is moderate-certainty evidence to support the beneficial value of topical or intravenous tranexamic acid during endoscopic sinus surgery with respect to surgical field bleeding score. Low- to moderate-certainty evidence suggests a slight decrease in total blood loss during surgery and duration of surgery. Whilst there is moderate-certainty evidence that tranexamic acid does not lead to more immediate significant adverse events compared to placebo, there is no evidence regarding the risk of serious adverse events more than 24 hours after surgery. There is low-certainty evidence that tranexamic acid may not change postoperative bleeding. There is not enough evidence available to draw robust conclusions about incomplete surgery or surgical complications.
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Affiliation(s)
- Evelijn Lourijsen
- Department of Otorhinolaryngology, Amsterdam UMC location AMC, Amsterdam, Netherlands
| | - Klementina Avdeeva
- Department of Otorhinolaryngology, Amsterdam UMC location AMC, Amsterdam, Netherlands
| | - Kit Liang Gan
- Department of Otorhinolaryngology, Mahkota Medical Centre, Melaka, Malaysia
| | - Vishal Pundir
- Department of Otorhinolaryngology, Maidstone and Tunbridge Wells NHS Trust, Tunbridge Wells, UK
| | - Wytske Fokkens
- Department of Otorhinolaryngology, Amsterdam UMC location AMC, Amsterdam, Netherlands
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Fuzi J, Budiono GR, Meller C, Jacobson I. Tranexamic acid in otorhinolaryngology - A contemporary review. World J Otorhinolaryngol Head Neck Surg 2021; 7:328-337. [PMID: 34632348 PMCID: PMC8486689 DOI: 10.1016/j.wjorl.2020.05.010] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/25/2020] [Revised: 05/13/2020] [Accepted: 05/26/2020] [Indexed: 11/25/2022] Open
Abstract
Tranexamic acid (TXA) is an anti-fibrinolytic agent which has been proven beneficial in multiple surgical specialties where significant bleeding can occur. Whilst it has been widely available for over 40 years its use within Otorhinolaryngology is still limited. Operations in Otorhinolaryngology are particularly varied with some such as tonsillectomy having the potential for significant life threatening bleeding. Other operations are performed within small confined surgical fields and even small amounts of bleeding can significantly detriment surgical field and increase technical difficulty and operative time. This review evaluated the current literature on the benefits of tranexamic acid within the field of Otorhinolaryngology and Head and Neck Surgery. Overall TXA was demonstrated to be a safe drug with no major adverse effects including thromboembolic events reported in any study. It has been shown to be of particular benefit in rhinology by improving surgical field, reducing operative time and reducing postoperative swelling and ecchymosis. The benefit in tonsillectomy is less clear and further studies are required to evaluate its potential use in the reduction of post tonsillectomy haemorrhage rates.
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Affiliation(s)
- Jordan Fuzi
- Department of Otolaryngology, Head and Neck Surgery, Prince of Wales Hospital, New South Wales, Australia
| | | | - Catherine Meller
- Department of Otolaryngology, Head and Neck Surgery, Prince of Wales Hospital, New South Wales, Australia
| | - Ian Jacobson
- Department of Otolaryngology, Head and Neck Surgery, Prince of Wales Hospital, New South Wales, Australia
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Does tranexamic acid improve intra-operative visualisation in endoscopic ear surgery? A double-blind, randomised, controlled trial. The Journal of Laryngology & Otology 2019; 133:1033-1037. [PMID: 31718728 DOI: 10.1017/s0022215119002317] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
Abstract
OBJECTIVE To assess the effect of tranexamic acid on intra-operative bleeding and surgical field visualisation. METHODS Fifty patients undergoing various endoscopic ear surgical procedures, including endoscopic tympanoplasty, endoscopic atticotomy or mastoidectomy, endoscopic ossiculoplasty, and endoscopic stapedotomy, were randomly assigned to: a study group that received tranexamic acid or a control group which received normal saline. The intra-operative bleeding and operative field visualisation was graded using the Das and Mitra endoscopic ear surgery bleeding and field visibility score, which was separately analysed for the external auditory canal and the middle ear. RESULTS The Das and Mitra score was better (p < 0.05) in the group that received tranexamic acid as a haemostat when working in the external auditory canal; with respect to the middle ear, no statistically significant difference was found between the two agents. Mean values for mean arterial pressure, heart rate and surgical time were comparable in both groups, with no statistically significant differences. CONCLUSION Tranexamic acid appears to be an effective haemostat in endoscopic ear surgery, thus improving surgical field visualisation, especially during manipulation of the external auditory canal soft tissues.
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Yates J, Perelman I, Khair S, Taylor J, Lampron J, Tinmouth A, Saidenberg E. Exclusion criteria and adverse events in perioperative trials of tranexamic acid: a systematic review and meta-analysis. Transfusion 2018; 59:806-824. [PMID: 30516835 DOI: 10.1111/trf.15030] [Citation(s) in RCA: 33] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/27/2018] [Revised: 10/01/2018] [Accepted: 10/06/2018] [Indexed: 12/12/2022]
Abstract
BACKGROUND Tranexamic acid (TXA) is an inexpensive therapy effective at minimizing perioperative blood loss and transfusion. However, it remains underutilized due to safety concerns. To date, no evidence-based guidelines exist identifying which patients should not receive TXA therapy. This study determined patient groups for whom safety information regarding TXA is lacking due to common exclusion from perioperative TXA trials. STUDY DESIGN AND METHODS A systematic review searching the databases Medline, EMBASE, CENTRAL, and Clinicaltrials.gov was performed. Randomized controlled trials (RCTs) administering systemic TXA perioperatively to elective or emergent surgery patients were eligible. Our primary outcome was to describe exclusion criteria of RCTs, and the secondary outcome was TXA safety. A descriptive synthesis of exclusion criteria was performed, and TXA safety was assessed by meta-analysis. RESULTS A total of 268 eligible RCTs were included. Meta-analysis showed that systemic TXA did not increase risk of adverse events compared to placebo or no intervention (relative risk, 1.05; 95% confidence interval, 0.99-1.12). Patient groups commonly excluded from perioperative TXA trials, and thus potentially lacking TXA safety data, were those with major comorbidities, a history of thromboembolism, medication use affecting coagulation, TXA allergy, and coagulopathy. Exclusion of patients with major comorbidities may not be necessary; we showed that the risk of adverse events was similar in studies that excluded patients with major comorbidities and those that did not. CONCLUSION Sufficient evidence exists to develop perioperative guidelines for TXA use in many populations. Further studies evaluating perioperative TXA use in patients with a history of thromboembolism are warranted.
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Affiliation(s)
- Jeffrey Yates
- Faculty of Medicine, University of Ottawa, Ottawa, Ontario, Canada
| | - Iris Perelman
- Faculty of Medicine, University of Ottawa, Ottawa, Ontario, Canada.,Clinical Epidemiology, Ottawa Hospital Research Institute, Ottawa, Ontario, Canada
| | - Simonne Khair
- Faculty of Medicine, University of Ottawa, Ottawa, Ontario, Canada
| | - Joshua Taylor
- Faculty of Medicine, University of Ottawa, Ottawa, Ontario, Canada
| | - Jacinthe Lampron
- Faculty of Medicine, University of Ottawa, Ottawa, Ontario, Canada.,Clinical Epidemiology, Ottawa Hospital Research Institute, Ottawa, Ontario, Canada.,Ottawa Hospital, Ottawa, Ontario, Canada
| | - Alan Tinmouth
- Faculty of Medicine, University of Ottawa, Ottawa, Ontario, Canada.,Clinical Epidemiology, Ottawa Hospital Research Institute, Ottawa, Ontario, Canada.,Ottawa Hospital, Ottawa, Ontario, Canada
| | - Elianna Saidenberg
- Faculty of Medicine, University of Ottawa, Ottawa, Ontario, Canada.,Clinical Epidemiology, Ottawa Hospital Research Institute, Ottawa, Ontario, Canada.,Ottawa Hospital, Ottawa, Ontario, Canada
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