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Bucher F, Dastagir N, Obed D, Enechukwu A, Dieck T, Vogt PM, Dastagir K. Factor XIII: More than just a fibrin stabilizer for the burn patient? A matched-pair analysis. JPRAS Open 2023; 37:1-8. [PMID: 37288428 PMCID: PMC10242619 DOI: 10.1016/j.jpra.2023.04.002] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/04/2023] [Accepted: 04/15/2023] [Indexed: 06/09/2023] Open
Abstract
Background Acquired factor XIII deficiency is an underestimated risk in patients with large surface burns, which potentially exposes these patients to prolonged bleeding and delayed wound healing if undetected. Methods A retrospective matched-pair analysis of the burn registry of the Department of Plastic, Aesthetic, Hand, and Reconstructive Surgery of Hannover Medical School was performed from 2018 to 2023. Results A total of 18 patients were included. Acquired factor XIII deficiency was not statistically significant correlated with age, sex, or body mass index. Patients who developed acquired factor XIII deficiency had a significantly longer hospital stay (72.8 days) compared with those in the matched group (46.4 days), although burn depths, total body surface area, and Abbreviated Burn Severity Index were not statistically correlated with factor XIII deficiency. Conclusions Little is known about acquired factor XIII deficiency in patients with burns. Factor XIII supplementation may improve hemostasis, wound healing, and general outcome while reducing the patient's exposure to blood products.
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Affiliation(s)
- Florian Bucher
- Corresponding author: Florian Bucher MD, Department of Plastic, Aesthetic, Hand, and Reconstructive Surgery, Hannover Medical School, Carl-Neuberg-Strasse 1, 30625 Hannover, Germany, Fax: +49 511 532-8864 Tel.: +49 176 15323754
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CT-001 is a rapid clearing factor VIIa with enhanced clearance and hemostatic activity for the treatment of acute bleeding in non-hemophilia settings. Thromb Res 2022; 215:58-66. [DOI: 10.1016/j.thromres.2022.05.007] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/15/2022] [Accepted: 05/16/2022] [Indexed: 11/21/2022]
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Venkatesh K, Henschke A, Lee RP, Delaney A. Patient-centred outcomes are under-reported in the critical care burns literature: a systematic review. Trials 2022; 23:199. [PMID: 35246209 PMCID: PMC8896280 DOI: 10.1186/s13063-022-06104-3] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/23/2021] [Accepted: 02/12/2022] [Indexed: 11/10/2022] Open
Abstract
BACKGROUND Developments in the care of critically ill patients with severe burns have led to improved hospital survival, but long-term recovery may be impaired. The extent to which patient-centred outcomes are assessed and reported in studies in this population is unclear. METHODS We conducted a systematic review to assess the outcomes reported in studies involving critically ill burns patients. Randomised controlled trials (RCTs) and cohort studies on the topics of fluid resuscitation, analgesia, haemodynamic monitoring, ventilation strategies, transfusion targets, enteral nutrition and timing of surgery were included. We assessed the outcomes reported and then classified these according to two suggested core outcome sets. RESULTS A comprehensive search returned 6154 studies; 98 papers met inclusion criteria. There were 66 RCTs, 19 clinical studies with concurrent controls and 13 interventional studies without concurrent controls. Outcome reporting was inconsistent across studies. Pain, reported using the visual analogue scale, fluid volume administered and mortality were the only outcomes measured in more than three studies. Sixty-six studies (67%) had surrogate primary outcomes. Follow-up was poor, with median longest follow-up across all studies 5 days (IQR 3-28). When compared to the suggested OMERACT core outcome set, 53% of papers reported on mortality, 28% reported on life impact, 30% reported resource/economic outcomes and 95% reported on pathophysiological manifestations. Burns-specific Falder outcome reporting was globally poor, with only 4.3% of outcomes being reported across the 98 papers. CONCLUSION There are deficiencies in the reporting of outcomes in the literature pertaining to the intensive care management of patients with severe burns, both with regard to the consistency of outcomes as well as a lack of focus on patient-centred outcomes. Long-term outcomes are infrequently reported. The development and validation of a core outcome dataset for severe burns would improve the quality of reporting.
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Affiliation(s)
- Karthik Venkatesh
- Malcolm Fisher Department of Intensive Care, The Royal North Shore Hospital, St Leonards, NSW, 2065, Australia. .,The University of New South Wales, Kensington, Sydney, NSW, Australia.
| | - Alice Henschke
- Department of Intensive Care, Orange Base Hospital, Orange, NSW, Australia.,Northern Clinical School, University of Sydney, Sydney, NSW, Australia
| | - Richard P Lee
- Malcolm Fisher Department of Intensive Care, The Royal North Shore Hospital, St Leonards, NSW, 2065, Australia.,Northern Clinical School, University of Sydney, Sydney, NSW, Australia
| | - Anthony Delaney
- Malcolm Fisher Department of Intensive Care, The Royal North Shore Hospital, St Leonards, NSW, 2065, Australia.,Northern Clinical School, University of Sydney, Sydney, NSW, Australia.,The George Institute for Global Health, Sydney, NSW, Australia
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Sim DS, Mallari CR, Teare JM, Feldman RI, Bauzon M, Hermiston TW. In vitro characterization of CT-001-a short-acting factor VIIa with enhanced prohemostatic activity. Res Pract Thromb Haemost 2021; 5:e12530. [PMID: 34263099 PMCID: PMC8265787 DOI: 10.1002/rth2.12530] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/24/2021] [Accepted: 04/12/2021] [Indexed: 11/06/2022] Open
Abstract
BACKGROUND Traumatic injury and the associated acute bleeding are leading causes of death in people aged 1 to 44 years. Acute bleeding in pathological and surgical settings also represents a significant burden to the society. Yet there are no approved hemostatic drugs currently available. While clinically proven as an effective pro-coagulant, activated factor VII (FVIIa) use in acute bleeding has been hampered by unwanted thromboembolic events. Enhancing the ability of FVIIa to quickly stop a bleed and clear rapidly from circulation may yield an ideal molecule suitable for use in patients with acute bleeding. OBJECTIVES To address this need and the current liability of FVIIa, we produced a novel FVIIa molecule (CT-001) with enhanced potency and shortened plasma residence time by cell line engineering and FVIIa protein engineering for superior efficacy for acute bleeding and safety. METHODS To address safety, CT-001, a FVIIa protein with 4 desialylated N-glycans was generated to promote active recognition and clearance via the asialoglycoprotein receptor. To enhance potency, the gamma-carboxylated domain was modified with P10Q and K32E, which enhanced membrane binding. RESULTS Together, these changes significantly enhanced potency and clearance while retaining the ability to interact with the key hemostatic checkpoint proteins antithrombin and tissue factor pathway inhibitor. CONCLUSIONS These results demonstrate that a FVIIa molecule engineered to combine supra-physiological activity and shorter duration of action has the potential to overcome the current limitations of recombinant FVIIa to be a safe and effective approach to the treatment of acute bleeding.
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Affiliation(s)
| | | | | | | | - Maxine Bauzon
- Were employed at Bayer HealthCare when part of this study was performed
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Welling H, Ostrowski SR, Stensballe J, Vestergaard MR, Partoft S, White J, Johansson PI. Management of bleeding in major burn surgery. Burns 2018; 45:755-762. [PMID: 30292526 DOI: 10.1016/j.burns.2018.08.024] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/29/2018] [Revised: 06/25/2018] [Accepted: 08/17/2018] [Indexed: 12/22/2022]
Abstract
Major burn surgery is often associated with excessive bleeding and massive transfusion, and the development of a coagulopathy during major burn surgery is associated with increased morbidity and mortality. The aim of this study was to review the literature on intraoperative haemostatic resuscitation of burn patients during necrectomy to reveal strategies applied for haemostatic monitoring and resuscitation. We searched PubMed, EMBASE, and CENTRAL for studies published in the period 2006-2017 concerning bleeding issues related to burn surgery i.e. coagulopathy, transfusion requirements and clinical outcomes. In a broad search, a total of 1375 papers were identified. 124 of these fulfilled the inclusion criteria, and six of these were included for review. The literature confirmed that transfusion requirements increases with burn injury severity and that haemostatic monitoring by TEG® (thrombelastography) or ROTEM® (rotational thromboelastometry) significantly decreased intraoperative transfusions and was useful in predicting and goal-directing haemostatic therapy during excision surgery. Resuscitation of bleeding during major burn surgery in many instances was neither standardized nor haemostatic. We suggest that resuscitation should aim for normal haemostasis during the bleeding phase through close haemostatic monitoring and resuscitation. Randomised controlled trials are highly warranted to confirm the benefit of this concept.
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Affiliation(s)
- Harald Welling
- Section for Transfusion Medicine, Rigshospitalet, Capital Region Blood Bank, Copenhagen University Hospital, Copenhagen, Denmark.
| | - Sisse Rye Ostrowski
- Department of Clinical Immunology, Copenhagen University Hospital, Rigshospitalet, Copenhagen, Denmark.
| | - Jakob Stensballe
- Section for Transfusion Medicine, Rigshospitalet, Capital Region Blood Bank, Copenhagen University Hospital, Copenhagen, Denmark; Department of Anaesthesiology, Centre of Head and Orthopaedics, Copenhagen University Hospital, Rigshospitalet, Copenhagen, Denmark.
| | - Martin Risom Vestergaard
- Department of Anaesthesiology, Centre of Head and Orthopaedics, Copenhagen University Hospital, Rigshospitalet, Copenhagen, Denmark.
| | - Søren Partoft
- Department of Burn Surgery, Centre of Head and Orthopaedics, Copenhagen University Hospital, Rigshospitalet, Copenhagen, Denmark.
| | - Jonathan White
- Department of Intensive Care, Abdominal Centre, Copenhagen University Hospital, Rigshospitalet, Denmark.
| | - Pär Ingemar Johansson
- Section for Transfusion Medicine, Rigshospitalet, Capital Region Blood Bank, Copenhagen University Hospital, Copenhagen, Denmark; Department of Surgery, Division of Acute Care Surgery, Centre for Translational Injury Research (CeTIR), University of Texas Medical School at Houston, TX, USA; Centre for Systems Biology, The School of Engineering and Natural Sciences, University of Iceland, Iceland.
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Carneiro JMGVDM, Alves J, Conde P, Xambre F, Almeida E, Marques C, Luís M, Godinho AMMG, Fernandez-Llimos F. Factor XIII-guided treatment algorithm reduces blood transfusion in burn surgery. BRAZILIAN JOURNAL OF ANESTHESIOLOGY (ENGLISH EDITION) 2018. [PMID: 29269148 PMCID: PMC9391805 DOI: 10.1016/j.bjane.2017.11.004] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
Background and objectives Major burn surgery causes large hemorrhage and coagulation dysfunction. Treatment algorithms guided by ROTEM® and factor VIIa reduce the need for blood products, but there is no evidence regarding factor XIII. Factor XIII deficiency changes clot stability and decreases wound healing. This study evaluates the efficacy and safety of factor XIII correction and its repercussion on transfusion requirements in burn surgery. Methods Randomized retrospective study with 40 patients undergoing surgery at the Burn Unit, allocated into Group A those with factor XIII assessment (n = 20), and Group B, those without assessment (n = 20). Erythrocyte transfusion was guided by a hemoglobin trigger of 10 g.dL−1 and the other blood products by routine coagulation and ROTEM® tests. Analysis of blood product consumption included units of erythrocytes, fresh frozen plasma, platelets, and fibrinogen. The coagulation biomarker analysis compared the pre- and post-operative values. Results and conclusions Group A (with factor XIII study) and Group B had identical total body surface area burned. All patients in Group A had a preoperative factor XIII deficiency, whose correction significantly reduced units of erythrocyte concentrate transfusion (1.95 vs. 4.05, p = 0.001). Pre- and post-operative coagulation biomarkers were similar between groups, revealing that routine coagulation tests did not identify factor XIII deficiency. There were no recorded thromboembolic events. Correction of factor XIII deficiency in burn surgery proved to be safe and effective for reducing perioperative transfusion of erythrocyte units.
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Algoritmo de tratamento guiado pelo fator XIII reduz a transfusão sanguínea na cirurgia de queimados. Braz J Anesthesiol 2018; 68:238-243. [DOI: 10.1016/j.bjan.2017.11.004] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/27/2016] [Revised: 10/30/2017] [Accepted: 11/20/2017] [Indexed: 11/19/2022] Open
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Butts CC, Bose K, Frotan MA, Hodge J, Gulati S. Controlling intraoperative hemorrhage during burn surgery: A prospective, randomized trial comparing NuStat® hemostatic dressing to the historic standard of care. Burns 2017; 43:374-378. [DOI: 10.1016/j.burns.2016.08.026] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/02/2016] [Revised: 08/24/2016] [Accepted: 08/26/2016] [Indexed: 10/21/2022]
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9
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Nonclinical Evaluation of the New Topical Hemostatic Agent TT-173 for Skin Grafting Procedures. J Burn Care Res 2017; 38:e824-e833. [PMID: 28157787 DOI: 10.1097/bcr.0000000000000497] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
Abstract
Blood loss during grafting surgery represents a major concern of this procedure and the development of hemostatic agents for this indication is highly desirable. TT-173 is the first biologically active treatment based on tissue factor instead of thrombin. This study sought to investigate the efficacy, systemic absorption, and toxicology of TT-173 in animal models to support clinical evaluation of the product in donor sites of patients subjected to skin grafting. Procoagulant efficacy of 148 μg of TT-173 was evaluated in pigs in presence and absence of anticoagulant treatment with unfractioned heparin. Systemic absorption was quantified and characterized in rats subjected to severe skin lesions with affectation of muscular plane using TT-173 radiolabeled with I. The same animal model was used to test the toxicology of a dose of 80 μg of the product. Application of TT-173 significantly reduced the bleeding time of donor sites, even under anticoagulant treatment. Systemic absorption was low; it was excreted through urine and did not concentrate in organs such as liver, lung, or spleen suggesting that the absorbed dose could correspond to degradation fragments without procoagulant activity. Finally, a dose of 80 μg of TT-173 did not cause analytical disturbances suggestive of intravascular coagulation or any other adverse reaction. Nonclinical data obtained suggest that TT-173 could be useful to reduce the blood loss associated to burns treatment and support the clinical evaluation of the product in donor sites of patients subjected to skin grafting.
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Glas GJ, Levi M, Schultz MJ. Coagulopathy and its management in patients with severe burns. J Thromb Haemost 2016; 14:865-74. [PMID: 26854881 DOI: 10.1111/jth.13283] [Citation(s) in RCA: 32] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/02/2015] [Accepted: 01/26/2016] [Indexed: 11/30/2022]
Abstract
Severe burn injury is associated with systemic coagulopathy. The changes in coagulation described in patients with severe burns resemble those found patients with sepsis or major trauma. Coagulopathy in patients with severe burns is characterized by procoagulant changes, and impaired fibrinolytic and natural anticoagulation systems. Both the timing of onset and the severity of hemostatic derangements are related to the severity of the burn. The exact pathophysiology and time course of coagulopathy are uncertain, but, at least in part, result from hemodilution and hypothermia. As the occurrence of coagulopathy in patients with severe burns is associated with increased comorbidity and mortality, coagulopathy could be seen as a potential therapeutic target. Clear guidelines for the treatment of coagulopathy in patients with severe burns are lacking, but supportive measures and targeted treatments have been proposed. Supportive measures are aimed at avoiding preventable triggers such as tissue hypoperfusion caused by shock, or hemodilution and hypothermia following the usually aggressive fluid resuscitation in these patients. Suggested targeted treatments that could benefit patients with severe burns include systemic treatment with anticoagulants, but sufficient randomized controlled trial evidence is lacking.
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Affiliation(s)
- G J Glas
- Laboratory of Experimental Intensive Care and Anesthesiology (L.E.I.C.A), Academic Medical Center, Amsterdam, the Netherlands
| | - M Levi
- Department of Medicine, Academic Medical Center, Amsterdam, the Netherlands
| | - M J Schultz
- Laboratory of Experimental Intensive Care and Anesthesiology (L.E.I.C.A), Academic Medical Center, Amsterdam, the Netherlands
- Department of Intensive Care, Academic Medical Center, Amsterdam, the Netherlands
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Practice guidelines for perioperative blood management: an updated report by the American Society of Anesthesiologists Task Force on Perioperative Blood Management*. Anesthesiology 2015; 122:241-75. [PMID: 25545654 DOI: 10.1097/aln.0000000000000463] [Citation(s) in RCA: 446] [Impact Index Per Article: 49.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
Abstract
Abstract
The American Society of Anesthesiologists Committee on Standards and Practice Parameters and the Task Force on Perioperative Blood Management presents an updated report of the Practice Guidelines for Perioperative Blood Management.
Supplemental Digital Content is available in the text.
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12
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Coagulopathy in burn patients: one part of a deadly trio. Burns 2015; 41:419-20. [PMID: 25681959 DOI: 10.1016/j.burns.2014.11.009] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/10/2014] [Accepted: 11/12/2014] [Indexed: 11/20/2022]
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Lavrentieva A. Replacement of specific coagulation factors in patients with burn: a review. Burns 2013; 39:543-8. [PMID: 23312909 DOI: 10.1016/j.burns.2012.12.009] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/29/2012] [Revised: 10/22/2012] [Accepted: 12/04/2012] [Indexed: 11/24/2022]
Abstract
Major burn is often associated with inflammation and coagulation system activation, consumption of endogenous coagulation factors, which have been associated with adverse clinical outcome. Coagulation system dysfunction during early postburn period is characterized by activation of procoagulation pathways, enhanced fibrinolytic activity and impairment of natural anticoagulants activity. Treatment principles focused on the normalization of coagulation and the inhibition of systemic inflammation might have a positive impact on organ function and on the outcome in septic burn patients. Modern treatment strategies using antithrombin, protein C and recombinant factor VIIa are based on early and continuous assessment of the bleeding and coagulation status of burn patients. This allows specific goal directed treatment, thereby optimizing the patient's coagulation status early, minimizing the patient's exposure to blood products, reducing costs and improving the patient's outcome.
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Affiliation(s)
- Athina Lavrentieva
- Papanikolaou General Hospital, Burn ICU, Hadzipanagiotidi 2, 55236 Thessaloniki, Greece.
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Schaden E, Kimberger O, Kraincuk P, Baron D, Metnitz P, Kozek-Langenecker S. Perioperative treatment algorithm for bleeding burn patients reduces allogeneic blood product requirements. Br J Anaesth 2012; 109:376-81. [DOI: 10.1093/bja/aes186] [Citation(s) in RCA: 63] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022] Open
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Lin Y, Moltzan CJ, Anderson DR. The evidence for the use of recombinant factor VIIa in massive bleeding: revision of the transfusion policy framework. Transfus Med 2012; 22:383-94. [PMID: 22630348 PMCID: PMC3546370 DOI: 10.1111/j.1365-3148.2012.01164.x] [Citation(s) in RCA: 30] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
In 2006, the Canadian National Advisory Committee on Blood and Blood Products (NAC) developed a transfusion policy framework for the use of off-label recombinant factor VIIa (rFVIIa) in massive bleeding. Because the number of randomised controlled trials has doubled, the NAC undertook a review of the policy framework in 2011. On the basis of the review of 29 randomised controlled trials, there remains little evidence to support the routine use of rFVIIa in massive bleeding. Mortality benefits have not been demonstrated. Contrarily, an increase in arterial thromboembolic events has been observed with the use of off-label rFVIIa. Given the absence of evidence of benefit and with evidence of the risk of harm, the NAC recommends that recombinant VIIa no longer be used for the off-label indications of prevention and treatment of bleeding in patients without haemophilia.
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Affiliation(s)
- Y Lin
- Department of Clinical Pathology, Sunnybrook Health Sciences Centre, Ontario, Canada.
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Simpson E, Lin Y, Stanworth S, Birchall J, Doree C, Hyde C. Recombinant factor VIIa for the prevention and treatment of bleeding in patients without haemophilia. Cochrane Database Syst Rev 2012:CD005011. [PMID: 22419303 DOI: 10.1002/14651858.cd005011.pub4] [Citation(s) in RCA: 71] [Impact Index Per Article: 5.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
Abstract
BACKGROUND Recombinant factor VIIa (rFVIIa) is licensed for use in patients with haemophilia and inhibitory allo-antibodies and for prophylaxis and treatment of patients with congenital factor VII deficiency. It is also used for off-license indications to prevent bleeding in operations where blood loss is likely to be high, and/or to stop bleeding that is proving difficult to control by other means. This is the third version of the 2007 Cochrane review on the use of recombinant factor VIIa for the prevention and treatment of bleeding in patients without haemophilia, and has been updated to incorporate recent trial data. OBJECTIVES To assess the effectiveness of rFVIIa when used therapeutically to control active bleeding or prophylactically to prevent (excessive) bleeding in patients without haemophilia. SEARCH METHODS We searched the Cochrane Central Register of Controlled Trials (CENTRAL), MEDLINE, EMBASE and other medical databases up to 23 March 2011. SELECTION CRITERIA Randomised controlled trials (RCTs) comparing rFVIIa with placebo, or one dose of rFVIIa with another, in any patient population (except haemophilia). Outcomes were mortality, blood loss or control of bleeding, red cell transfusion requirements, number of patients transfused and thromboembolic adverse events. DATA COLLECTION AND ANALYSIS Two authors independently assessed potentially relevant studies for inclusion, extracted data and examined risk of bias. We considered prophylactic and therapeutic rFVIIa studies separately. MAIN RESULTS Twenty-nine RCTs were included: 28 were placebo-controlled, double-blind RCTs and one compared different doses of rFVIIa. In the 'Risk of bias' assessment, most studies were found to have some threats to validity although therapeutic RCTs were found to be less prone to bias than prophylactic RCTs.Sixteen trials involving 1361 participants examined the prophylactic use of rFVIIa; 729 received rFVIIa. There was no evidence of mortality benefit (risk ratio (RR) 1.04; 95% confidence interval (CI) 0.55 to 1.97). There was decreased blood loss (mean difference (MD) -297 mL; 95% CI -416 to -178) and decreased red cell transfusion requirements (MD -261 mL; 95% CI -367 to -154) with rFVIIa treatment; however, these values were likely overestimated due to the inability to incorporate data from trials (four RCTs in the outcome of blood loss and three RCTs in the outcome of transfusion requirements) showing no difference of rFVIIa treatment compared to placebo. There was a trend in favour of rFVIIa in the number of participants transfused (RR 0.85; 95% CI 0.72 to 1.01). However, there was a trend against rFVIIa with respect to thromboembolic adverse events (RR 1.35; 95% CI 0.82 to 2.25).Thirteen trials involving 2929 participants examined the therapeutic use of rFVIIa; 1878 received rFVIIa. There were no outcomes where any observed advantage or disadvantage of rFVIIa over placebo could not have been observed by chance alone. There was a trend in favour of rFVIIa for reducing mortality (RR 0.91; 95% CI 0.78 to 1.06). However, there was a trend against rFVIIa for increased thromboembolic adverse events (RR 1.14; 95% CI 0.89 to 1.47).When all trials were pooled together to examine the risk of thromboembolic events, a significant increase in total arterial events was observed (RR 1.45; 95% CI 1.02 to 2.05). AUTHORS' CONCLUSIONS The effectiveness of rFVIIa as a more general haemostatic drug, either prophylactically or therapeutically, remains unproven. The results indicate increased risk of arterial events in patients receiving rFVIIa. The use of rFVIIa outside its current licensed indications should be restricted to clinical trials.
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Affiliation(s)
- Ewurabena Simpson
- Department of Paediatrics, Division of Haematology/Oncology, The Hospital for Sick Children, Toronto, Canada.
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Schaden E, Hoerburger D, Hacker S, Kraincuk P, Baron DM, Kozek-Langenecker S. Fibrinogen function after severe burn injury. Burns 2011; 38:77-82. [PMID: 22113102 DOI: 10.1016/j.burns.2010.12.004] [Citation(s) in RCA: 29] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/03/2010] [Revised: 11/14/2010] [Accepted: 12/05/2010] [Indexed: 01/07/2023]
Abstract
BACKGROUND Evidence regarding hypercoagulability in the first week after burn trauma is growing. This hypercoagulable state may partly be caused by increased fibrinogen levels. Rotational thrombelastometry offers a test which measures functional fibrinogen (FIBTEM(®)). To test the hypothesis that in patients with severe burn injury fibrinogen function changes over time, we simultaneously measured FIBTEM(®) and fibrinogen concentration early after burn trauma. METHODS After Ethics Committee approval consecutive patients with severe burn trauma admitted to the burn intensive care unit of the General Hospital of Vienna were included in the study. Blood examinations were done immediately and 12, 24 and 48 h after admission. At each time point fibrinogen level (Clauss) and 4 commercially available ROTEM(®) tests were performed. RESULTS 20 consecutive patients were included in the study. Fibrinogen level and FIBTEM(®) MCF were within the reference range until 24 h after burn trauma but increased significantly 48 h after trauma. There was a significant correlation between FIBTEM(®) MCF and fibrinogen level (R=0.714, p<0.001). CONCLUSION The results of this prospective observational clinical study show that fibrinogen function changes early after burn trauma and can be visualized by ROTEM(®) with the fibrinogen-sensitive FIBTEM(®) test.
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Affiliation(s)
- Eva Schaden
- Dept. of Anesthesiology, General Intensive Care and Pain Control, Medical University Of Vienna, Austria.
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Chavez-Tapia NC, Alfaro-Lara R, Tellez-Avila F, Barrientos-Gutiérrez T, González-Chon O, Mendez-Sanchez N, Uribe M. Prophylactic activated recombinant factor VII in liver resection and liver transplantation: systematic review and meta-analysis. PLoS One 2011; 6:e22581. [PMID: 21818342 PMCID: PMC3144913 DOI: 10.1371/journal.pone.0022581] [Citation(s) in RCA: 37] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/24/2011] [Accepted: 06/24/2011] [Indexed: 01/10/2023] Open
Abstract
Background and Aim Intraoperative blood loss is a frequent complication of hepatic resection and orthotopic liver transplantation. Recombinant activated coagulation factor VII (rFVIIa) is a coagulation protein that induces hemostasis by directly activating factor X. There is no clear information about the prophylactic value of rFVIIa in hepatobiliary surgery, specifically in liver resection and orthotopic liver transplantation. The aim of this study was to assess the effect of rFVIIa prophylaxis to prevent mortality and bleeding resulting from hepatobiliary surgery. Methods Relevant randomized trials were identified by searching The Cochrane Central Register of Controlled Trials in The Cochrane Library, MEDLINE, EMBASE, and Science Citation Index. Randomized clinical trials comparing different rFVIIa prophylactic schemas against placebo or no intervention to prevent bleeding in hepatobiliary surgery were included. Adults undergoing liver resection, partial hepatectomy, or orthotopic liver transplantation were included. Dichotomous data were analyzed calculating odds ratios (ORs) and 95% confidence intervals (CIs). Continuous data were analyzed calculating mean differences (MD) and 95% CIs. Results Four randomized controlled trials were included. There were no significant differences between rFVIIa and placebo for mortality (OR 0.96; 95% CI 0.35–2.62), red blood cell units (MD 0.32; 95% CI −0.08–0.72) or adverse events (OR 1.55; 95% CI 0.97–2.49). Conclusions The available information is limited, precluding the ability to draw conclusions regarding bleeding prophylaxis in hepatobiliary surgery using rFVIIa. Although an apparent lack of effect was observed in all outcomes studied, further research is needed.
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Witmer CM, Huang YS, Lynch K, Raffini LJ, Shah SS. Off-label recombinant factor VIIa use and thrombosis in children: a multi-center cohort study. J Pediatr 2011; 158:820-825.e1. [PMID: 21146180 PMCID: PMC3075379 DOI: 10.1016/j.jpeds.2010.10.038] [Citation(s) in RCA: 41] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/19/2010] [Revised: 09/09/2010] [Accepted: 10/26/2010] [Indexed: 01/27/2023]
Abstract
OBJECTIVE To describe the off-label use of recombinant factor VIIa (rFVIIa) in tertiary care pediatric hospitals across the United States and to assess thrombotic events. STUDY DESIGN A retrospective multi-center cohort study using the Pediatric Health Information System administrative database. Children 18 years of age or younger who received rFVIIa between 2000 and 2007 were included. A label admission was defined as an admission with an International Classification of Diseases diagnostic code for hemophilia or factor VII deficiency; admissions without these codes were classified as off-label. RESULTS There were 4942 rFVIIa admissions, representing 3764 individual subjects; 74% (3655) of the admissions were off-label. There was a 10-fold increase in the annual rate of off-label admissions from 2000 to 2007 (from 2 to 20.8 per 10 000 hospital admissions, P < .001). The mortality rate in the off-label group was 34% (1258/3655). Thrombotic events occurred in 10.9% (399/3655) of the off-label admissions. CONCLUSIONS The off-label use of rFVIIa in hospitalized children is increasing rapidly despite the absence of adequate clinical trials demonstrating safety and efficacy. Thrombotic events are common and mortality is high among patients receiving off-label rFVIIa. Further studies are warranted to determine whether these adverse events are attributable to rFVIIa.
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Affiliation(s)
- Char M Witmer
- Division of Hematology, The Children's Hospital of Philadelphia, University of Pennsylvania School of Medicine, Philadelphia, PA, USA.
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20
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Lin Y, Stanworth S, Birchall J, Doree C, Hyde C. Recombinant factor VIIa for the prevention and treatment of bleeding in patients without haemophilia. Cochrane Database Syst Rev 2011:CD005011. [PMID: 21328270 DOI: 10.1002/14651858.cd005011.pub3] [Citation(s) in RCA: 29] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Abstract
BACKGROUND Recombinant factor VIIa (rFVIIa) is licensed for use in patients with haemophilia and inhibitory allo-antibodies. It is also increasingly being used for off-license indications to prevent bleeding in operations where blood loss is likely to be high, and/or to stop bleeding that is proving difficult to control by other means. OBJECTIVES To assess the effectiveness of rFVIIa when used therapeutically to control active bleeding, or prophylactically to prevent (excessive) bleeding in patients without haemophilia. SEARCH STRATEGY We searched the Cochrane Injuries Group Specialised Register, CENTRAL, MEDLINE, EMBASE and other specialised databases up to 25 February 2009. SELECTION CRITERIA Randomised controlled trials (RCTs) comparing rFVIIa with placebo, or one dose of rFVIIa with another, in any patient population (except haemophilia). Outcomes were mortality, blood loss or control of bleeding, red cell transfusion requirements, number of patients transfused and thromboembolic adverse events. DATA COLLECTION AND ANALYSIS Two authors independently assessed potentially relevant studies for inclusion, extracted data and examined risk of bias. We considered prophylactic and therapeutic rFVIIa studies separately. MAIN RESULTS Twenty-five RCTs were included: 24 were placebo-controlled double-blind RCTs and one compared different doses of rFVIIa.Fourteen trials involving 1137 participants examined the prophylactic use of rFVIIa; 713 received rFVIIa. There was no evidence of mortality benefit (RR 1.06; 95% CI 0.50 to 2.24). There was decreased blood loss (WMD -272 mL; 95% CI -399 to -146) and decreased red cell transfusion requirements (WMD -243 mL; 95% CI -393 to -92) with rFVIIa treatment; however these values were likely overestimated due to the inability to incorporate data from trials showing no difference of rFVIIa treatment compared to placebo. There was a trend in favour of rFVIIa in the number of participants transfused (RR 0.91; 95% CI 0.82 to 1.02). But there was a trend against rFVIIa with respect to thromboembolic adverse events (RR 1.32; 95% CI 0.84 to 2.06).Eleven trials involving 2366 participants examined the therapeutic use of rFVIIa; 1507 received rFVIIa. There were no outcomes where any observed advantage, or disadvantage, of rFVIIa over placebo could not have been observed by chance alone. There was a trend in favour of rFVIIa for reducing mortality (RR 0.89; 95% CI 0.77 to 1.03). However, there was a trend against rFVIIa for increased thromboembolic adverse events (RR 1.21; 95% CI 0.93 to 1.58). AUTHORS' CONCLUSIONS The effectiveness of rFVIIa as a more general haemostatic drug, either prophylactically or therapeutically, remains unproven. The use of rFVIIa outside its current licensed indications should be restricted to clinical trials.
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Affiliation(s)
- Yulia Lin
- Department of Clinical Pathology, Sunnybrook Health Sciences Centre and Canadian Blood Services, 2075 Bayview Avenue, Room B204, Toronto, Ontario, Canada, M4N 3M5
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21
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Lin Y, Stanworth S, Birchall J, Doree C, Hyde C. Use of recombinant factor VIIa for the prevention and treatment of bleeding in patients without hemophilia: a systematic review and meta-analysis. CMAJ 2011; 183:E9-19. [PMID: 21078742 PMCID: PMC3017272 DOI: 10.1503/cmaj.100408] [Citation(s) in RCA: 42] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/01/2022] Open
Abstract
BACKGROUND The benefits and risks of off-label use of recombinant factor VIIa in patients without hemophilia are contested. We performed a systematic review to assess the effectiveness and safety of such use. METHODS We searched electronic databases including MEDLINE, EMBASE and CENTRAL for randomized controlled trials comparing recombinant factor VIIa with placebo in any patient population except those with hemophilia up to January 2010. Eligible articles were assessed for inclusion, data were extracted, and study quality was evaluated. Outcomes included mortality, blood loss, requirements for red blood cell transfusion, number of patients transfused and thromboembolic events. RESULTS We identified 26 trials: 14 on off-label prophylactic use of recombinant factor VIIa (n = 1137) and 12 on off-label therapeutic use (n = 2538). In the studies on prophylactic use, we found no significant difference in mortality or thromboembolic events between the treatment and placebo groups. We found modest benefits favouring recombinant factor VIIa in blood loss (weighted mean difference -276 mL, 95% confidence interval [CI] -411 to -141 mL), red blood cell transfusion (weighted mean difference -281 mL, 95% CI -433 to -129 mL) and number of patients transfused (relative risk 0.71, 95% CI 0.50 to 0.99). In the therapeutic trials, we found a nonsignificant decrease in mortality and a nonsignificant increase in thromboembolic events but no difference in control of bleeding or red blood cell transfusion. INTERPRETATION Clinically significant benefits of recombinant factor VIIa as a general hemostatic agent in patients without hemophilia remain unproven. Given its potential risks, such use cannot be recommended, and in most cases, it should be restricted to clinical trials.
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Affiliation(s)
- Yulia Lin
- Department of Clinical Pathology, Sunnybrook Health Sciences Centre, Toronto, Toronto, Ont, Canada.
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22
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Sterling JP, Heimbach DM. Hemostasis in burn surgery--a review. Burns 2010; 37:559-65. [PMID: 21194843 DOI: 10.1016/j.burns.2010.06.010] [Citation(s) in RCA: 27] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/21/2010] [Accepted: 06/29/2010] [Indexed: 10/18/2022]
Abstract
Over the past 30 years, techniques of early excision and grafting along with enhancement of critical care have significantly improved survival following burn injury. Despite these advancements, large volume blood loss associated with surgical intervention continues to be a challenging aspect of burn surgery. This review article will examine the methods of limiting blood loss during surgical procedures.
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Affiliation(s)
- Jose P Sterling
- University of Texas, Southwestern Medical School, Dallas, TX, USA
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23
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Grottke O, Henzler D, Rossaint R. Activated recombinant factor VII (rFVIIa). Best Pract Res Clin Anaesthesiol 2010; 24:95-106. [DOI: 10.1016/j.bpa.2009.09.005] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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Affiliation(s)
- Dennis P Orgill
- Division of Plastic and Reconstructive Surgery, Brigham and Women's Hospital, Boston, MA 02115, USA.
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25
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26
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Abstract
In the year 2007, approximately 1000 original burn research articles were published in scientific journals using the English language. This article reviews approximately 90 of these which were deemed by the author to be the most important in terms of clinical burn care. Relevant topics include epidemiology, wound characterisation, critical care physiology, inhalation injury, infection, metabolism and nutrition, psychological considerations, pain management, rehabilitation, and burn reconstruction. Each selected article is mentioned briefly with editorial comment.
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Affiliation(s)
- Steven E Wolf
- Department of Surgery, University of Texas Health Science Center, San Antonio and the United States Army Institute of Surgical Research, San Antonio 7703 Floyd Curl, TX 78229-3600, USA.
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Hardy JF, Bélisle S, Van der Linden P. Efficacy and Safety of Recombinant Activated Factor VII to Control Bleeding in Nonhemophiliac Patients: A Review of 17 Randomized Controlled Trials. Ann Thorac Surg 2008; 86:1038-48. [DOI: 10.1016/j.athoracsur.2008.05.013] [Citation(s) in RCA: 38] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/25/2008] [Revised: 05/05/2008] [Accepted: 05/06/2008] [Indexed: 11/27/2022]
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28
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Carcao MD, Webert KE. On-label versus off-label use of recombinant activated factor VII: a comprehensive review of use in two Canadian centers. Semin Hematol 2008; 45:S68-71. [PMID: 18544429 DOI: 10.1053/j.seminhematol.2008.03.003] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Abstract
Recombinant activated factor VII (rFVIIa; NovoSeven, NiaStase, Novo Nordisk, Bagsvaerd, Denmark) was originally developed for the treatment of bleeds in patients with hemophilia and inhibitors. However, the agent is increasingly being employed in "off-label"/unlicensed indications. Consequently there is a need to undertake comprehensive reviews of rFVIIa use; the resulting information will facilitate understanding of how the agent is currently being employed and help to determine trends in its use. This article considers two recently reported reviews describing the use of rFVIIa in two heavily populated regions of Canada--regions with a combined population capture area of approximately 8.5 million people. The reviews report rFVIIa use in a total of 196 patients who collectively received 15,262.8 mg of rFVIIa. Both reviews obtained similar findings and reached similar conclusions: the majority of patients receiving rFVIIa are being treated for "off-label" indications, with numbers of such patients having grown rapidly between the years 2000 and 2005. However, hemophilia patients still account for the vast majority of rFVIIa use, as small numbers of hemophilia patients can consume large quantities of the agent. It is important to be aware of the increasing use of rFVIIa in off-label indications.
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Affiliation(s)
- Manuel D Carcao
- Division of Hematology/Oncology, Department of Pediatrics, Hospital for Sick Children, University of Toronto, Toronto, Canada.
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29
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30
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Johansson PI. Off-label use of recombinant factor VIIa for treatment of haemorrhage: results from randomized clinical trials. Vox Sang 2008; 95:1-7. [DOI: 10.1111/j.1423-0410.2008.01063.x] [Citation(s) in RCA: 32] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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Mallarkey G, Brighton T, Thomson A, Kaye K, Seale P, Gazarian M. An Evaluation of Eptacog Alfa in Nonhaemophiliac Conditions. Drugs 2008; 68:1665-89. [DOI: 10.2165/00003495-200868120-00005] [Citation(s) in RCA: 14] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/30/2022]
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Stanworth SJ, Birchall J, Doree CJ, Hyde C. Recombinant factor VIIa for the prevention and treatment of bleeding in patients without haemophilia. Cochrane Database Syst Rev 2007:CD005011. [PMID: 17443565 DOI: 10.1002/14651858.cd005011.pub2] [Citation(s) in RCA: 29] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
Abstract
BACKGROUND Recombinant factor VIIa (rFVIIa) is licensed for use in patients with haemophilia and inhibitory allo-antibodies. It is also increasingly being used for off-license indications to prevent bleeding in operations where blood loss is likely to be high, and/or to stop bleeding that is proving difficult to control by other means. OBJECTIVES To assess the effectiveness of rFVIIa when used therapeutically to control active bleeding, or prophylactically to prevent (excessive) bleeding in patients without haemophilia. SEARCH STRATEGY We searched the Cochrane Injuries Group's Specialised Register, CENTRAL, MEDLINE, EMBASE and other specialised databases up to March 2006. We also searched reference lists of articles and contacted experts in the field. SELECTION CRITERIA Randomised controlled trials (RCTs) comparing rFVIIa with placebo, or one dose of rFVIIa with another, in any patient population with the exception of those with haemophilia. There was no restriction by outcomes examined, but this review focuses on mortality, blood loss or control of bleeding, red cell transfusion requirements, number of patients transfused and thromboembolic adverse events. DATA COLLECTION AND ANALYSIS Two authors independently assessed potentially relevant studies for inclusion. Data were extracted and methodological quality was examined. Studies using rFVIIa prophylactically and those using rFVIIa therapeutically have been considered separately. Data were pooled using fixed and random effects models, but random effects models were preferred because of the variability in clinical features of the included studies. MAIN RESULTS Thirteen trials met the inclusion criteria; all were placebo-controlled double-blind RCTs. Six trials involving 724 participants examined the prophylactic use of rFVIIa; 379 received rFVIIa. There were no outcomes by which any observed advantage, or disadvantage, of rFVIIa over placebo could not have been observed by chance alone. There were trends in favour of rFVIIa for a number of outcomes, particularly the number of participants transfused, pooled RR 0.85 (95% CI 0.72 to 1.01) but this was balanced by a trend against rFVIIa with respect to thromboembolic adverse events, pooled RR 1.25 (95% CI 0.76 to 2.07). Seven trials involving 1214 participants examined the therapeutic use of rFVIIa; 687 received rFVIIa. There were no outcomes where any observed advantage, or disadvantage, of rFVIIa over placebo could not have been observed by chance alone. There was a trend in favour of rFVIIa for reducing mortality, RR 0.82 (95% CI 0.64 to 1.04), although no other clear trends in favour of rFVIIa were noted for other desired outcomes. Interpretation of these results must take into account one study which could not be included in the quantitative summary but which showed results strongly in favour of rFVIIa for the treatment of intra-cerebral haemorrhage. There was a trend against rFVIIa with respect to thromboembolic adverse events; the RR 1.50 (95% CI 0.86 to 2.62). AUTHORS' CONCLUSIONS Although rFVIIa has a role in the management of patients with haemophilia, its effectiveness as a more general haemostatic drug, either prophylactically or therapeutically, remains uncertain. Its effectiveness as a therapeutic agent, particularly for intra-cerebral haemorrhage, looks more encouraging than prophylactic use. The use of rFVIIa outside its current licensed indications should be very limited and its wider use await the results of ongoing and possibly newly commissioned RCTs. In the interim, rFVIIa use should be restricted to clinical trials.
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Affiliation(s)
- S J Stanworth
- National Blood Service, Haematology, Level 2, John Radcliffe Hospital, Headington, Oxford, UK OX3 9BQ.
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