1
|
Kido K, Kabulski GM, Szymanski TW, Shiga T, Shimizu M, Hashiguchi M. Meta-Analysis Comparing Bivalirudin Versus. Unfractionated Heparin in Adult Patients With Extracorporeal Membrane Oxygenation. J Pharm Pract 2024; 37:429-434. [PMID: 36449392 DOI: 10.1177/08971900221143406] [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] [Indexed: 02/16/2024]
Abstract
Introduction: Unfractionated heparin (UFH) has traditionally been the agent of choice in patients on extracorporeal membrane oxygenation (ECMO). However, direct thrombin inhibitors (DTI) have recently garnered more attention in ECMO because of their advantages over UFH. Given the heterogeneous results of multiple recent published studies, we performed a meta-analysis to describe pooled outcomes between bivalirudin and UFH anticoagulation in patients on ECMO. Methods: Relevant studies were identified from MEDLINE and Google Scholar database searches through April 23, 2022. The primary efficacy outcome was thromboembolism (TE), and secondary efficacy outcomes included all-cause mortality and circuit thrombosis. The primary safety outcome was major bleeding. Results: A total of 6 studies were included in the meta-analysis. Bivalirudin use was associated with significantly lower risk of TE (OR 0.61; 95% CI 0.38-.99; P = .05; I2 = 0%) and circuit thrombosis (OR 0.51; 95% CI .32-.80; P = .004; I2 = 0%) compared with UFH. There was no significant difference in all-cause mortality risk (OR 0.75; 95% CI .52-1.09; P = .13; I2 = 30%) between the bivalirudin and UFH groups. No significant difference in the risk of major bleeding between 2 groups was found (OR 0.67; 95% CI 0.25-1.81; P = .43; I2 = 80%). Conclusion: These data support that bivalirudin is a reasonable alternative to UFH in patients on ECMO. Randomized controlled trials are needed to confirm bivalirudin's efficacy and safety results compared with UFH.
Collapse
Affiliation(s)
- Kazuhiko Kido
- Department of Clinical Pharmacy, West Virginia University School of Pharmacy, Morgantown, WV, USA
| | - Galen M Kabulski
- Department of Pharmacy, Ruby Memorial Hospital, Morgantown, WV, USA
| | | | - Tsuyoshi Shiga
- Department of Clinical Pharmacology and Therapeutics, The Tokyo Jikei University School of Medicine, Tokyo, Japan
| | - Mikiko Shimizu
- Department of Pharmaceutics and Pharmacometrics, School of Pharmacy, Shujitsu University, Okayama, Japan
| | | |
Collapse
|
2
|
Halawi H, Harris JE, Goodarzi A, Yau S, Youssef JG, Botros M, Huang HJ. Use of bivalirudin after initial heparin management among adult patients on long-term venovenous extracorporeal support as a bridge to lung transplant: A case series. Pharmacotherapy 2024; 44:283-289. [PMID: 38304955 DOI: 10.1002/phar.2910] [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: 09/03/2023] [Revised: 12/16/2023] [Accepted: 12/22/2023] [Indexed: 02/03/2024]
Abstract
A growing body of evidence supports the use of bivalirudin as an alternative to unfractionated heparin (UFH) for the prevention of thrombotic events in patients on venovenous (VV) extracorporeal membrane oxygenation (ECMO). However, data in patients bridged to lung transplantation are limited. In this case series, we describe the outcomes of six patients who were transitioned from UFH to bivalirudin during their course of VV ECMO support as a bridge to lung transplantation. All six patients were on VV ECMO support until transplant, with a median duration of 73 days. Bivalirudin demonstrated a shorter time to first therapeutic activated thromboplastin time (aPTT) level. Additionally, time in therapeutic range was longer while patients were receiving bivalirudin compared to UFH (median 92.9% vs. 74.6%). However, major bleeding and thrombotic events occurred while patients were receiving either anticoagulant. Based on our experience, bivalirudin appears to be a viable option for anticoagulation in VV ECMO patients bridged to lung transplantation. Larger studies evaluating the optimal anticoagulation strategy in patients bridged to transplant are needed.
Collapse
Affiliation(s)
- Hala Halawi
- Department of Pharmacy, Houston Methodist Hospital, Houston, Texas, USA
| | - Jesse E Harris
- Department of Pharmacy, Houston Methodist Hospital, Houston, Texas, USA
| | - Ahmad Goodarzi
- Department of Medicine, Houston Methodist Hospital, Houston, Texas, USA
- J.C. Walter Jr. Transplant Center, Houston Methodist Hospital, Houston, Texas, USA
| | - Simon Yau
- Department of Medicine, Houston Methodist Hospital, Houston, Texas, USA
- J.C. Walter Jr. Transplant Center, Houston Methodist Hospital, Houston, Texas, USA
| | - Jihad G Youssef
- Department of Medicine, Houston Methodist Hospital, Houston, Texas, USA
- J.C. Walter Jr. Transplant Center, Houston Methodist Hospital, Houston, Texas, USA
| | - Mena Botros
- Department of Medicine, Houston Methodist Hospital, Houston, Texas, USA
- J.C. Walter Jr. Transplant Center, Houston Methodist Hospital, Houston, Texas, USA
| | - Howard J Huang
- Department of Medicine, Houston Methodist Hospital, Houston, Texas, USA
- J.C. Walter Jr. Transplant Center, Houston Methodist Hospital, Houston, Texas, USA
| |
Collapse
|
3
|
Lopez ND, Seto SL, Barra ME, Roberts RJ, Rosovsky RP, Solomon EJ, Dalia A. Evaluation of Bivalirudin During Adult Extracorporeal Membrane Oxygenation: A Retrospective Characterization of Dosing, Efficacy and Bleeding. Hosp Pharm 2024; 59:77-85. [PMID: 38223854 PMCID: PMC10786057 DOI: 10.1177/00185787231188924] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/16/2024]
Abstract
Objective: Although heparin is the current standard anticoagulant during venoarterial (VA) and venovenous (VV) extracorporeal membrane oxygenation (ECMO), factors including heparin-induced thrombocytopenia, heparin resistance and drug shortages necessitate alternative anticoagulants such as direct thrombin inhibitors. The aim was to characterize dosing, safety, and efficacy of bivalirudin during ECMO support. Methods: This retrospective single-center study included 24 adults on ECMO support who received ≥6 hours of bivalirudin. The primary endpoint was dose to first therapeutic activated partial thromboplastin time (aPTT). Secondary endpoints included evaluating dosing between ECMO modes, incidence of bleeding and thrombotic events, and time in therapeutic range (TTR). Results: The dose at time of first therapeutic aPTT was bivalirudin 0.05 [0.05-0.1] mg/kg/hour. Bivalirudin dosing requirements were lower in VAECMO compared to VV-ECMO patients and were not impacted by continuous venovenous hemofiltration. Time to therapeutic aPTT was 5.5 [2-13] hours for VA-ECMO and 4.5 [2-8.6] hours for VV-ECMO patients. During any mode of ECMO TTR was 58.3% [39.6-73.1]. Thrombotic events occurred in 3 (13%) patients and major bleeding occurred in 12 (50%) patients. Conclusions: Our findings demonstrated variable bivalirudin dosing requirements based on mode of ECMO and dosing modifications may not be required during CVVH. Factors including mode of ECMO, indication for bivalirudin and concomitant antiplatelet therapy may impact hematologic events. Application of this data can assist with developing a bivalirudin ECMO protocol which provides less variability in initial dosing and TTR.
Collapse
Affiliation(s)
| | | | | | | | - Rachel P. Rosovsky
- Massachusetts General Hospital, Boston, MA, USA
- Harvard Medical School, Boston, MA, USA
| | | | - Adam Dalia
- Massachusetts General Hospital, Boston, MA, USA
- Harvard Medical School, Boston, MA, USA
| |
Collapse
|
4
|
Graboyes SDT, Owen PS, Evans RA, Berei TJ, Hryniewicz KM, Hollis IB. Review of anticoagulation considerations in extracorporeal membrane oxygenation support. Pharmacotherapy 2023; 43:1339-1363. [PMID: 37519116 DOI: 10.1002/phar.2857] [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: 01/27/2023] [Revised: 06/10/2023] [Accepted: 06/16/2023] [Indexed: 08/01/2023]
Abstract
Since its first success in 1975, extracorporeal membrane oxygenation (ECMO) has been used with increasing frequency for pulmonary and cardiopulmonary bypass. Use in adults has increased exponentially since the early 2000s, but despite thousands of international cannulations using both veno-arterial (VA) and veno-venous (VV) ECMO, there are still significant hemocompatibility-related adverse events. Current management of anticoagulation has been based on the Extracorporeal Life Support Organization guidance published in 2014 with recent updates published in 2022. Despite this guidance, there is still limited international consensus on how to manage anticoagulation in ECMO. For this review, we completed a comprehensive search of multiple electronic databases to identify studies pertaining to anticoagulation of adult patients on VV or VA-ECMO. The highest priority was given to sources that were prospective, randomized, controlled studies, but in the absence of such resources, observational studies, retrospective uncontrolled studies, and case series/reports were considered for inclusion. This document serves to provide a comprehensive review of the current understanding of management pertaining to anticoagulation relating to ECMO.
Collapse
Affiliation(s)
- Sydney D T Graboyes
- Department of Pharmacy, University of California, Davis Medical Center, Sacramento, California, USA
| | - Phillip S Owen
- Department of Pharmacy, University of North Carolina Medical Center, Chapel Hill, North Carolina, USA
| | - Rickey A Evans
- Department of Pharmacy, University of Kentucky HealthCare, Lexington, Kentucky, USA
| | - Theodore J Berei
- Department of Pharmacy, University of Wisconsin Hospitals and Clinics, Madison, Wisconsin, USA
| | - Katarzyna M Hryniewicz
- Heart Failure Section, Minneapolis Heart Institute at Abbot Northwestern Hospital, Minneapolis, Minnesota, USA
| | - Ian B Hollis
- Department of Pharmacy, University of North Carolina Medical Center, Chapel Hill, North Carolina, USA
| |
Collapse
|
5
|
Tonetti T, Zanella A, Pérez-Torres D, Grasselli G, Ranieri VM. Current knowledge gaps in extracorporeal respiratory support. Intensive Care Med Exp 2023; 11:77. [PMID: 37962702 PMCID: PMC10645840 DOI: 10.1186/s40635-023-00563-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: 01/18/2023] [Accepted: 11/08/2023] [Indexed: 11/15/2023] Open
Abstract
Extracorporeal life support (ECLS) for acute respiratory failure encompasses veno-venous extracorporeal membrane oxygenation (V-V ECMO) and extracorporeal carbon dioxide removal (ECCO2R). V-V ECMO is primarily used to treat severe acute respiratory distress syndrome (ARDS), characterized by life-threatening hypoxemia or ventilatory insufficiency with conventional protective settings. It employs an artificial lung with high blood flows, and allows improvement in gas exchange, correction of hypoxemia, and reduction of the workload on the native lung. On the other hand, ECCO2R focuses on carbon dioxide removal and ventilatory load reduction ("ultra-protective ventilation") in moderate ARDS, or in avoiding pump failure in acute exacerbated chronic obstructive pulmonary disease. Clinical indications for V-V ECLS are tailored to individual patients, as there are no absolute contraindications. However, determining the ideal timing for initiating extracorporeal respiratory support remains uncertain. Current ECLS equipment faces issues like size and durability. Innovations include intravascular lung assist devices (ILADs) and pumpless devices, though they come with their own challenges. Efficient gas exchange relies on modern oxygenators using hollow fiber designs, but research is exploring microfluidic technology to improve oxygenator size, thrombogenicity, and blood flow capacity. Coagulation management during V-V ECLS is crucial due to common bleeding and thrombosis complications; indeed, anticoagulation strategies and monitoring systems require improvement, while surface coatings and new materials show promise. Moreover, pharmacokinetics during ECLS significantly impact antibiotic therapy, necessitating therapeutic drug monitoring for precise dosing. Managing native lung ventilation during V-V ECMO remains complex, requiring a careful balance between benefits and potential risks for spontaneously breathing patients. Moreover, weaning from V-V ECMO is recognized as an area of relevant uncertainty, requiring further research. In the last decade, the concept of Extracorporeal Organ Support (ECOS) for patients with multiple organ dysfunction has emerged, combining ECLS with other organ support therapies to provide a more holistic approach for critically ill patients. In this review, we aim at providing an in-depth overview of V-V ECMO and ECCO2R, addressing various aspects of their use, challenges, and potential future directions in research and development.
Collapse
Affiliation(s)
- Tommaso Tonetti
- Department of Medical and Surgical Sciences (DIMEC), Alma Mater Studiorum-University of Bologna, Bologna, Italy
- Anesthesiology and General Intensive Care Unit, IRCCS Azienda Ospedaliero-Universitaria di Bologna, Policlinico di S.Orsola, Bologna, Italy
| | - Alberto Zanella
- Department of Anesthesia, Critical Care and Emergency, Fondazione Istituto di Ricovero e Cura a Carattere Scientifico Ca' Granda Ospedale Maggiore Policlinico, Via F. Sforza 35, 20122, Milan, Italy
- Department of Pathophysiology and Transplantation, University of Milan, Milan, Italy
| | - David Pérez-Torres
- Servicio de Medicina Intensiva, Hospital Universitario Río Hortega, Gerencia Regional de Salud de Castilla y León (SACYL), Calle Dulzaina, 2, 47012, Valladolid, Spain
| | - Giacomo Grasselli
- Department of Anesthesia, Critical Care and Emergency, Fondazione Istituto di Ricovero e Cura a Carattere Scientifico Ca' Granda Ospedale Maggiore Policlinico, Via F. Sforza 35, 20122, Milan, Italy.
- Department of Pathophysiology and Transplantation, University of Milan, Milan, Italy.
| | - V Marco Ranieri
- Department of Medical and Surgical Sciences (DIMEC), Alma Mater Studiorum-University of Bologna, Bologna, Italy
- Anesthesiology and General Intensive Care Unit, IRCCS Azienda Ospedaliero-Universitaria di Bologna, Policlinico di S.Orsola, Bologna, Italy
| |
Collapse
|
6
|
Mitchell M, Sullinger D, Dyer D, Hickey G, Kaczorowski D, Minor J, Murray H, Ramanan R, Rhinehart Z, Schmidhofer M, Rivosecchi RM. Evaluation of Newly Integrated Bivalirudin Titration Protocol in Patients With Mechanical Circulatory Support. Ann Pharmacother 2023:10600280231206130. [PMID: 37887435 DOI: 10.1177/10600280231206130] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/28/2023] Open
Abstract
BACKGROUND Patients with cardiogenic shock or end-stage heart failure can be maintained on mechanical circulatory support (MCS) devices. Once a patient undergoes placement of a device, obtaining and maintaining therapeutic anticoagulation is vital. Guidelines recommend the use of institutional protocols to assist in dosing and titration of anticoagulants. OBJECTIVE The purpose of this study was to characterize the use of bivalirudin before and after the implementation of a standardized titration protocol in patients with MCS. METHODS A retrospective review of patients who received bivalirudin for MCS (VA ECMO [veno-arterial extracorporeal membrane oxygenation], Impella, or LVAD [left ventricular assist device]) before and after the implementation of the titration protocol into the electronic health record (EHR) was conducted. The primary outcome was to compare the proportion of therapeutic activated partial thromboplastin time (aPTT). Secondary outcomes included number of subtherapeutic and supratherapeutic aPTTs, incidence of bleeding and clotting events, bivalirudin titrations per day, and percentage of patients with therapeutic aPTT level. RESULTS A total of 100 patients were included (precohort = 67; postcohort = 33). The proportion of therapeutic aPTTs was significantly higher in the postcohort than that in the precohort (62% vs 48%; P < 0.001). The postcohort had 0% of patients failing to achieve therapeutic aPTT levels. The number of titrations per day was significantly lower in the postcohort, with 1.20 titrations per day versus 1.93 in the precohort (P < 0.001). CONCLUSIONS Implementation of the bivalirudin titration nomograms within the EHR significantly increased the number of therapeutic aPTTs, reduced the number of patients who never achieved a therapeutic aPTT, and reduced the required number of titrations per day.
Collapse
Affiliation(s)
- Madeline Mitchell
- Department of Pharmacy, University of Pittsburgh Medical Center, Pittsburgh, PA, USA
| | - Danine Sullinger
- Department of Pharmacy, University of Pittsburgh Medical Center, Pittsburgh, PA, USA
| | - Duke Dyer
- University of Pittsburgh Medical Center, Pittsburgh, PA, USA
| | - Gavin Hickey
- Heart & Vascular Institute, University of Pittsburgh Medical Center, Pittsburgh, PA, USA
| | - David Kaczorowski
- Department of Cardiothoracic Surgery, University of Pittsburgh Medical Center, Pittsburgh, PA, USA
| | - Joni Minor
- University of Pittsburgh Medical Center, Pittsburgh, PA, USA
| | - Holt Murray
- Department of Critical Care Medicine, University of Pittsburgh Medical Center, Pittsburgh, PA, USA
| | - Raj Ramanan
- Department of Critical Care Medicine, University of Pittsburgh Medical Center, Pittsburgh, PA, USA
| | - Zachary Rhinehart
- Heart & Vascular Institute, University of Pittsburgh Medical Center, Pittsburgh, PA, USA
| | - Mark Schmidhofer
- Heart & Vascular Institute, University of Pittsburgh Medical Center, Pittsburgh, PA, USA
| | - Ryan M Rivosecchi
- Department of Pharmacy, University of Pittsburgh Medical Center, Pittsburgh, PA, USA
| |
Collapse
|
7
|
Chen J, Chen G, Zhao W, Peng W. Anticoagulation strategies in patients with extracorporeal membrane oxygenation: A network meta-analysis and systematic review. Pharmacotherapy 2023; 43:1084-1093. [PMID: 37538041 DOI: 10.1002/phar.2859] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/27/2023] [Revised: 05/17/2023] [Accepted: 05/23/2023] [Indexed: 08/05/2023]
Abstract
OBJECTIVES Extracorporeal membrane oxygenation (ECMO) plays an important role in providing temporary life support for patients with severe cardiac or pulmonary failure, but requires strict anticoagulation and monitoring. This network meta-analysis systematically explored the most effective anticoagulation and monitoring strategies for patients receiving ECMO. METHODS MEDLINE, Embase, Web of Science, and the Cochrane Central Register of Controlled Trials were searched up to January 31, 2023, for studies comparing unfractionated heparin (UFH), argatroban (Arg), bivalirudin (Biv), and/or nafamostat mesylate (NM) in patients receiving ECMO. The primary outcomes included device-related thrombosis, patient-related thrombosis, and major bleeding events. The secondary outcomes included ECMO survival, ECMO duration, and in-hospital mortality. RESULTS A total of 2522 patients from 23 trials were included in the study. Biv was associated with a decreased risk of device-related thrombosis (odd ratio [OR] 0.51, 95% confidence interval [CI]: 0.33-0.84) compared with UFH, whereas NM (OR 2.2, 95% CI: 0.24-65.0) and Arg (OR 0.92, 95% CI: 0.43-2.0) did not reduce the risk of device-related thrombosis compared with UFH. Biv was superior to Arg in decreasing the risk of device-related thrombosis (OR 0.14, 95% CI: 0.03-0.51). Biv reduced the risk of patient-related thrombosis compared with UFH (OR 0.44, 95% CI: 0.18-0.85); NM (OR 0.65, 95% CI: 0.14-3.3) and Arg (OR 3.1, 95% CI: 0.94-12.0) did not decrease risk of patient-related thrombosis compared with UFH. No significant difference was observed in the risk of major bleeding between three alternatives and UFH: Biv (OR 0.54, 95% CI: 0.23-1.3), Arg (OR 1.3, 95% CI: 0.34-5.8), and NM (OR 0.60, 95% CI: 0.13-2.6). NM showed a reduced risk of in-hospital mortality compared with UFH (OR 0.27, 95% CI: 0.091-0.77), whereas Arg (OR 0.43, 95% CI: 0.15-1.2) and Biv (OR 0.75, 95% CI: 0.52-1.1) did not decrease risk of in-hospital mortality. CONCLUSIONS Compared with UFH and Arg, Biv reduces the risk of thrombosis and appears to be a better choice for patients requiring ECMO. NM was associated with a reduced risk of in-hospital mortality.
Collapse
Affiliation(s)
- Jiale Chen
- Department of Pharmacy, Affiliated Jinhua Hospital, Zhejiang University School of Medicine, Jinhua, China
| | - Guoquan Chen
- Department of Pharmacy, Affiliated Jinhua Hospital, Zhejiang University School of Medicine, Jinhua, China
| | - Wenyi Zhao
- Department of Pharmacy, Affiliated Jinhua Hospital, Zhejiang University School of Medicine, Jinhua, China
| | - Wenxing Peng
- Department of Pharmacy, Beijing Anzhen Hospital, Capital Medical University, Beijing, China
| |
Collapse
|
8
|
Šoltés J, Skribuckij M, Říha H, Lipš M, Michálek P, Balík M, Pořízka M. Update on Anticoagulation Strategies in Patients with ECMO-A Narrative Review. J Clin Med 2023; 12:6067. [PMID: 37763010 PMCID: PMC10532142 DOI: 10.3390/jcm12186067] [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: 08/08/2023] [Revised: 09/14/2023] [Accepted: 09/18/2023] [Indexed: 09/29/2023] Open
Abstract
The use of extracorporeal membrane oxygenation (ECMO) has recently increased exponentially. ECMO has become the preferred mode of organ support in refractory respiratory or circulatory failure. The fragile balance of haemostasis physiology is massively altered by the patient's critical condition and specifically the aetiology of the underlying disease. Furthermore, an application of ECMO conveys another disturbance of haemostasis due to blood-circuit interaction and the presence of an oxygenator. The purpose of this review is to summarise current knowledge on the anticoagulation management in patients undergoing ECMO therapy. The unfractionated heparin modality with monitoring of activated partial thromboplastin tests is considered to be a gold standard for anticoagulation in this specific subgroup of intensive care patients. However, alternative modalities with other agents are comprehensively discussed. Furthermore, other ways of monitoring can represent the actual state of coagulation in a more complex fashion, such as thromboelastometric/graphic methods, and might become more frequent. In conclusion, the coagulation system of patients with ECMO is altered by multiple variables, and there is a significant lack of evidence in this area. Therefore, a highly individualised approach is the best solution today.
Collapse
Affiliation(s)
- Ján Šoltés
- Department of Anaesthesiology and Intensive Care Medicine, First Faculty of Medicine, Charles University in Prague and General University Hospital in Prague, 12808 Prague, Czech Republic; (J.Š.); (H.Ř.); (M.L.); (P.M.); (M.B.)
- Emergency Service of Central Bohemia, Vančurova 1544, 27201 Kladno, Czech Republic
| | - Michal Skribuckij
- Department of Anaesthesia, Golden Jubilee University National Hospital, Clydebank G81 4DY, UK;
| | - Hynek Říha
- Department of Anaesthesiology and Intensive Care Medicine, First Faculty of Medicine, Charles University in Prague and General University Hospital in Prague, 12808 Prague, Czech Republic; (J.Š.); (H.Ř.); (M.L.); (P.M.); (M.B.)
- Department of Anaesthesiology and Intensive Care Medicine, Institute for Clinical and Experimental Medicine, 14021 Prague, Czech Republic
| | - Michal Lipš
- Department of Anaesthesiology and Intensive Care Medicine, First Faculty of Medicine, Charles University in Prague and General University Hospital in Prague, 12808 Prague, Czech Republic; (J.Š.); (H.Ř.); (M.L.); (P.M.); (M.B.)
| | - Pavel Michálek
- Department of Anaesthesiology and Intensive Care Medicine, First Faculty of Medicine, Charles University in Prague and General University Hospital in Prague, 12808 Prague, Czech Republic; (J.Š.); (H.Ř.); (M.L.); (P.M.); (M.B.)
- Department of Anaesthesia, Antrim Area Hospital, Antrim BT41 2RL, UK
| | - Martin Balík
- Department of Anaesthesiology and Intensive Care Medicine, First Faculty of Medicine, Charles University in Prague and General University Hospital in Prague, 12808 Prague, Czech Republic; (J.Š.); (H.Ř.); (M.L.); (P.M.); (M.B.)
| | - Michal Pořízka
- Department of Anaesthesiology and Intensive Care Medicine, First Faculty of Medicine, Charles University in Prague and General University Hospital in Prague, 12808 Prague, Czech Republic; (J.Š.); (H.Ř.); (M.L.); (P.M.); (M.B.)
| |
Collapse
|
9
|
Huang D, Guan Q, Qin J, Shan R, Wu J, Zhang C. Bivalirudin versus heparin anticoagulation in patients receiving extracorporeal membrane oxygenation. Perfusion 2023; 38:1133-1141. [PMID: 35616224 DOI: 10.1177/02676591221105605] [Citation(s) in RCA: 5] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
OBJECTIVE Bivalirudin has been suggested as an alternative to heparin for anticoagulation in patients receiving extracorporeal membrane oxygenation (ECMO). Nevertheless, there is limited evidence about the benefit of bivalirudin in ECMO patients compared with heparin. Hence, we conducted a meta-analysis to assess the effect of bivalirudin versus heparin on clinical outcomes in patients receiving ECMO. METHODS PubMed, Embase, and the Cochrane Library were systematically searched from inception up to 1 April 2022 for cohort studies and randomized controlled trials comparing bivalirudin versus heparin in patients who received ECMO. The primary outcome was short-term death. Secondary outcomes included thrombotic events and bleeding events. RESULTS We selected 12 retrospective cohort studies with 1232 ECMO patients focusing on bivalirudin anticoagulation (n = 497) versus heparin anticoagulation (n = 735). Two hundred and one of 497 patients (40.4%) in the bivalirudin group versus 350 of 735 patients (47.6%) in the heparin group did not survive to hospital discharge. Compared with the heparin group, bivalirudin anticoagulation did not significantly decrease in-hospital mortality in patients receiving ECMO (RR, 0.95; 95% CI, 0.79-1.13; p = 0.546). Fifty-seven of 374 patients (15.2%) in the bivalirudin versus 99 of 381 patients (26.0%) in the heparin group suffered from thrombotic events. Compared with the heparin group, bivalirudin anticoagulation did not significantly decrease the rate of thrombotic events for patients receiving ECMO (RR, 0.78; 95% CI, 0.45-1.35; p = 0.378). However, bivalirudin anticoagulation significantly decreased the incidence of bleeding events compared to the heparin group (RR, 0.48; 95% CI, 0.25-0.95; p = 0.035). CONCLUSIONS Compared with heparin anticoagulation, bivalirudin did not decrease the rates of short-term mortality and thrombotic events, but reduced the incidence of bleeding events in patients receiving ECMO.
Collapse
Affiliation(s)
- Daochao Huang
- Emergency department, Taizhou Hospital of Zhejiang province affiliated to Wenzhou Medical University, Taizhou, Zhejiang, China
| | - QiongChan Guan
- Emergency department, Taizhou Hospital of Zhejiang province affiliated to Wenzhou Medical University, Taizhou, Zhejiang, China
| | - Jie Qin
- Emergency department, Taizhou Hospital of Zhejiang province affiliated to Wenzhou Medical University, Taizhou, Zhejiang, China
| | - Renfei Shan
- Emergency department, Taizhou Hospital of Zhejiang province affiliated to Wenzhou Medical University, Taizhou, Zhejiang, China
| | - Jinhong Wu
- Obstetrics and gynecology department, Taizhou Hospital of Zhejiang province affiliated to Wenzhou Medical University, Taizhou, Zhejiang, China
| | - Chuang Zhang
- Emergency department, Taizhou Hospital of Zhejiang province affiliated to Wenzhou Medical University, Taizhou, Zhejiang, China
| |
Collapse
|
10
|
Navaei A, Kostousov V, Teruya J. Is it time to switch to bivalirudin for ECMO anticoagulation? Front Med (Lausanne) 2023; 10:1237601. [PMID: 37671395 PMCID: PMC10476497 DOI: 10.3389/fmed.2023.1237601] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/09/2023] [Accepted: 07/31/2023] [Indexed: 09/07/2023] Open
Abstract
For decades, unfractionated heparin (hereafter, heparin) has been the primary anticoagulant used for extracorporeal membrane oxygenation (ECMO) support. More recently, however, bivalirudin, a direct thrombin inhibitor, has emerged as an alternative. This systematic review based on PRISMA guidelines, aims to summarize 16 comparative studies and 8 meta-analysis and review articles published from January, 2011 till May, 2023 which directly compares ECMO courses using heparin versus bivalirudin as the anticoagulant. While this comparison is complicated by the lack of a standardized definition of major bleeding or thrombosis, our overall findings suggest there is no statistical difference between heparin and bivalirudin in incidence of bleeding and thrombosis. That said, some studies found a statistical significance favoring bivalirudin in reducing major bleeding, thrombosis, and the need for transfusions. We also offer essential guidance for appropriately selecting an anticoagulant and monitoring its effect in ECMO settings.
Collapse
Affiliation(s)
- Amir Navaei
- Department of Pediatrics, Texas Children’s Hospital, Baylor College of Medicine, Houston, TX, United States
- Department of Pathology & Immunology, Baylor College of Medicine, Houston, TX, United States
| | - Vadim Kostousov
- Department of Pathology & Immunology, Baylor College of Medicine, Houston, TX, United States
| | - Jun Teruya
- Department of Pediatrics, Texas Children’s Hospital, Baylor College of Medicine, Houston, TX, United States
- Department of Pathology & Immunology, Baylor College of Medicine, Houston, TX, United States
- Department of Medicine, Texas Children’s Hospital, Baylor College of Medicine, Houston, TX, United States
| |
Collapse
|
11
|
Meshulami N, Green R, Kaushik S. Anti-Xa testing for pediatric and neonatal patients on extracorporeal membrane oxygenation. Perfusion 2023:2676591231185009. [PMID: 37339106 DOI: 10.1177/02676591231185009] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/22/2023]
Abstract
INTRODUCTION To determine if anti-Xa testing is associated with improved outcomes for patients <19-years-old on ECMO. METHODS We evaluated the clinical benefit of anti-Xa heparin monitoring utilizing the Bleeding and Thrombosis during ECMO (BATE) database of 514 patients <19-years-old. The BATE database includes incidences of bleeding, thrombosis, and mortality. The database also describes anti-coagulation test utilization. We grouped and analyzed patients based on ECMO indication (cardiac, respiratory, or extracorporeal cardiopulmonary resuscitation [E-CPR]) and age (neonatal vs pediatric). We constructed multivariable logistic regression models to analyze the impact of anti-Xa testing on mortality, bleeding, and thrombosis in each group. RESULTS Across the entire population, anti-Xa testing did not have a significant effect on the incidence of mortality (43% with anti-Xa testing vs 49% without), bleeding (68% vs 74%), or thrombosis (37% vs 39%). However, among cardiac indicated patients on ECMO (n = 207), anti-Xa testing was significantly associated with reduced odds ratio (OR) of mortality (adjusted OR 0.527, p = .040) and bleeding (adjusted OR 0.369, p = .021). In addition, among neonatal patients on ECMO (n = 264), anti-Xa testing was associated with a significant reduction in the odds ratio of bleeding (adjusted OR 0.534, p = .046). CONCLUSION Anti-Xa testing is associated with improved outcomes among cardiac indicated and neonatal patients on ECMO. Additional research to find the optimal heparin monitoring regimen is needed to better support these critically ill patients. In the interim, we recommend clinicians consider utilizing anti-Xa assays as part of their heparin monitoring plan for neonatal and cardiac indicated patients on ECMO.
Collapse
Affiliation(s)
- Noy Meshulami
- Icahn School of Medicine at Mount Sinai, New York, NY, USA
| | - Robert Green
- Icahn School of Medicine at Mount Sinai, New York, NY, USA
- Division of Newborn Medicine, Department of Pediatrics, Kravis Children's Hospital at Mount Sinai, Icahn School of Medicine at Mount Sinai, New York, NY, USA
| | - Shubhi Kaushik
- Icahn School of Medicine at Mount Sinai, New York, NY, USA
- Pediatric Critical Care, Department of Pediatrics, Kravis Children's Hospital at Mount Sinai, Icahn School of Medicine at Mount Sinai, New York, NY, USA
| |
Collapse
|
12
|
Freniere V, Salerno DM, Corbo H, Law S, McAllister J, Neunert C, Chen JK. Bivalirudin Compared to Heparin as the Primary Anticoagulant in Pediatric Berlin Heart Recipients. ASAIO J 2023; 69:e205-e211. [PMID: 36943709 DOI: 10.1097/mat.0000000000001921] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/23/2023] Open
Abstract
Bivalirudin has been used in increasing frequency as an alternative to unfractionated heparin (UFH) in pediatric recipients of Berlin Heart EXCOR ventricular assist devices (VAD). This single-center, retrospective review characterizes anticoagulant trends and outcomes in pediatric Berlin Heart VAD recipients implanted between September 1, 2013, and August 31, 2021, anticoagulated with either bivalirudin or UFH. Thirty-one patients were included; 65% who received bivalirudin and 35% who received UFH. The median age was 2.9 years, included 64.5% females, with 61.3% of patients diagnosed with dilated cardiomyopathy and 25.8% of patients with congenital heart disease. Therapeutic anticoagulation was achieved sooner in the bivalirudin group compared to UFH via anti-Xa monitoring (median 5.7 and 69.5 hours, respectively, p < 0.001). Bivalirudin had a greater number of therapeutic values comparatively to UFH (52% and 24%, respectively; p < 0.001) and a superior number of hours in the therapeutic range (67% and 32%, respectively; p < 0.001). Secondary outcomes were similar among the two groups, apart from greater chest tube output (UFH), more frequent events of elevated plasma-free hemoglobin (bivalirudin), and more frequent elevated inflammatory markers postimplant (bivalirudin). Prevalence of pump replacements secondary to significant clot burden and prevalence of stroke was comparable. In this patient cohort, bivalirudin demonstrated greater anticoagulation stability comparatively to UFH. Multicenter collaboration would be necessary to identify whether this further translates into improved patient outcomes.
Collapse
Affiliation(s)
| | - David M Salerno
- From the Department of Pharmacy, NewYork-Presbyterian Hospital
| | - Heather Corbo
- From the Department of Pharmacy, NewYork-Presbyterian Hospital
| | - Sabrina Law
- Department of Pediatrics, Columbia University Irving Medical Center, New York, New York
| | - Jennie McAllister
- Department of Pediatrics, Columbia University Irving Medical Center, New York, New York
| | - Cindy Neunert
- Department of Pediatrics, Columbia University Irving Medical Center, New York, New York
| | - Justin K Chen
- From the Department of Pharmacy, NewYork-Presbyterian Hospital
| |
Collapse
|
13
|
Worku ET, Win AM, Parmar D, Anstey C, Shekar K. Haematological Trends and Transfusion during Adult Extracorporeal Membrane Oxygenation: A Single Centre Study. J Clin Med 2023; 12:2629. [PMID: 37048711 PMCID: PMC10095131 DOI: 10.3390/jcm12072629] [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: 02/11/2023] [Revised: 03/28/2023] [Accepted: 03/30/2023] [Indexed: 04/03/2023] Open
Abstract
The temporal trends in haematological parameters and their associations with blood product transfusion requirements in patients supported with extracorporeal membrane oxygenation (ECMO) are poorly understood. We performed a retrospective data analysis to better understand the behaviour of haematological and coagulation parameters and their associations with transfusion requirements during ECMO. METHODS Patient demographics, haematological and coagulation parameters, plasma haemoglobin and fibrinogen concentrations, platelet count, the international normalised ratio (INR), the activated partial thromboplastin time (APTT), and blood product transfusion data from 138 patients who received ECMO in a single high-volume centre were analysed. RESULTS Ninety-two patients received venoarterial (VA) ECMO and 46 patients received venovenous (VV) ECMO. The median (IQR) duration of VA, and VV ECMO was 8 (5-13) days and 13 (8-23) days, respectively. There were significant reductions in haemoglobin, the platelet count, and the fibrinogen concentration upon initiation of ECMO. On average, over time, patients on VV ECMO had platelet counts 44 × 109/L higher than those on VA ECMO (p ≤ 0.001). Fibrinogen and APTT did not vary significantly based on the mode of ECMO (p = 0.55 and p = 0.072, respectively). A platelet count < 50 × 109/L or a fibrinogen level < 1.8 g/L was associated with 50% chance of PRBC transfusion, regardless of the ECMO type, and packed red blood cell (PRBC) transfusion was more common with VA ECMO. APTT was predictive of the transfusion requirement, and the decrement in APTT was discriminatory between VVECMO survivors and nonsurvivors. CONCLUSION ECMO support is associated with reductions in haemoglobin, platelet count, and fibrinogen. Patients supported with VA ECMO are more likely to receive a PRBC transfusion compared to those on VV ECMO. Thrombocytopaenia, hypofibrinogenaemia, and anticoagulation effect the likelihood of requiring PRBC transfusion. Further research is needed to define optimal blood management during ECMO, including appropriate transfusion triggers and the anticoagulation intensity.
Collapse
Affiliation(s)
- Elliott T. Worku
- Adult Intensive Care Services, The Prince Charles Hospital, Chermside, QLD 4032, Australia
- School of Medicine, University of Queensland, St Lucia, QLD 4072, Australia
| | - April M. Win
- Intensive Care Unit, The Townsville Hospital, Townsville, QLD 4810, Australia
| | - Dinesh Parmar
- Adult Intensive Care Services, The Prince Charles Hospital, Chermside, QLD 4032, Australia
| | - Chris Anstey
- School of Medicine, University of Queensland, St Lucia, QLD 4072, Australia
- Intensive Care Unit, Sunshine Coast University Hospital, Birtinya, QLD 4575, Australia
| | - Kiran Shekar
- Adult Intensive Care Services, The Prince Charles Hospital, Chermside, QLD 4032, Australia
- School of Medicine, University of Queensland, St Lucia, QLD 4072, Australia
- Faculty of Medicine, Bond University, Gold Coast, QLD 4226, Australia
| |
Collapse
|
14
|
Tong Y, Rouzhahong J, Zhou W, Wang R, Wang Y, Ren Y, Guo J, Li Y, Wang Z, Song Y. Comparison of bivalirudin versus heparin in adult extracorporeal membrane oxygenation anticoagulant therapy: A retrospective case-control study. Int J Artif Organs 2023; 46:162-170. [PMID: 36600413 DOI: 10.1177/03913988221148763] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/06/2023]
Abstract
INTRODUCTION There were controversial opinions on the use of bivalirudin versus heparin for anticoagulant therapy in extracorporeal membrane oxygenation. The aim of our present study is to evaluate the efficacy and safety of bivalirudin versus heparin for the maintenance of systemic anticoagulation during adult veno-venous extracorporeal membrane oxygenation (V-V ECMO). METHODS Adult patients who received V-V ECMO support in our center between February 2018and February 2022 were retrospectively recruited. We analyzed their ECMO support time, platelet count, coagulation indicators, blood product infusion volume, the incidence of thrombosis and bleeding, probability of successful weaning of ECMO, and in-hospital mortality. RESULTS A total of 58 patients received V-V ECMO support. Thirty-four patients were finally included according to the exclusion and inclusion criteria, 14 and 20 accepted bivalirudin and heparin for anticoagulant therapy, respectively. The Minimum platelet value (98.50 × 109/L (85.50, 123.75) vs 49.50 × 109/L (31.25, 83.00), p = 0.002) and mean platelet value (149.90 × 109/L (127.40, 164.80) vs 74.55 × 109/L (62.45, 131.60), p = 0.03) and the ratio of successful weaning of ECMO (92.8% vs 60.0%, p = 0.033) in bivalirudin group were significantly higher than those in heparin group. The red blood cell infusion volume (7.00 U (3.00, 13.25) vs 13.75 U (7.25, 22.63), p = 0.039), platelet infusion volume (0.00 mL (0.00, 75.00) vs 300 mL (0.00, 825.00), p = 0.027), and the incidence of major bleeding (0.00% vs 30%, p = 0.024) in bivalirudin group were significantly lower than those in heparin group. CONCLUSIONS In V-V ECMO-supported adult patients, systemic anticoagulation with bivalirudin has achieved the same anticoagulation targets as heparin with less frequency of major bleeding events and lower requirement for blood products without significantly increased risk of thrombosis. Bivalirudin most likely is a safe and effective anticoagulation method for adult patients supported by V-V ECMO.
Collapse
Affiliation(s)
- Yaowei Tong
- Department of Intensive Care Unit, The First Affiliated Hospital of Xinjiang Medical University, Urumchi, China
| | - Julaiti Rouzhahong
- Department of Intensive Care Unit, The First Affiliated Hospital of Xinjiang Medical University, Urumchi, China
| | - Wangtao Zhou
- Department of Intensive Care Unit, The First Affiliated Hospital of Xinjiang Medical University, Urumchi, China
| | - Rui Wang
- Department of Intensive Care Unit, The First Affiliated Hospital of Xinjiang Medical University, Urumchi, China
| | - Yuqiang Wang
- Department of Intensive Care Unit, The First Affiliated Hospital of Xinjiang Medical University, Urumchi, China
| | - Yucheng Ren
- Department of Intensive Care Unit, The First Affiliated Hospital of Xinjiang Medical University, Urumchi, China
| | - Ju Guo
- Department of Intensive Care Unit, The First Affiliated Hospital of Xinjiang Medical University, Urumchi, China
| | - Ying Li
- Department of Intensive Care Unit, The First Affiliated Hospital of Xinjiang Medical University, Urumchi, China
| | - Zhengkai Wang
- Department of Intensive Care Unit, The First Affiliated Hospital of Xinjiang Medical University, Urumchi, China
| | - Yunlin Song
- Department of Intensive Care Unit, The First Affiliated Hospital of Xinjiang Medical University, Urumchi, China
| |
Collapse
|
15
|
Superiority of bivalirudin over heparin anticoagulation therapy for extracorporeal membrane oxygenation? Too early to draw conclusions. Heliyon 2023; 9:e13530. [PMID: 36865472 PMCID: PMC9970897 DOI: 10.1016/j.heliyon.2023.e13530] [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: 09/19/2022] [Revised: 01/29/2023] [Accepted: 02/01/2023] [Indexed: 02/08/2023] Open
Abstract
Background We aimed to compare the efficacy and safety of bivalirudin versus heparin as the anticoagulant in patients undergoing extracorporeal membrane oxygenation (ECMO). Methods We conducted a search in PubMed, Embase and the Cochrane Library for all the studies in which bivalirudin was compared to heparin as the anticoagulant for ECMO. Efficacy outcomes were defined as the time to reach therapeutic levels, time within therapeutic range (TTR), thrombotic events, circuit thrombosis, circuit exchanges. Safety outcomes were reported as heparin-induced thrombocytopenia (HIT), major bleeding events, minor bleeding events. Other outcomes included hospital length of stay (LOS), ICU LOS, mortality, 30-day mortality and in-hospital mortality. Results Ten studies with 1091 patients were included for meta-analysis. A significant reduction in thrombotic events [OR 0.51, 95%CI 0.36,0.73, p = 0.0002, I2 = 0%], major bleeding events [OR 0.31, 95%CI 0.10,0.92, p = 0.04, I2 = 75%] and in-hospital mortality [OR 0.63, 95%CI 0.44,0.89, p = 0.009, I2 = 0%] treated with bivalirudin were found compared with heparin. There were no significant differences between groups regarding the time to reach therapeutic levels [MD 3.53, 95%CI -4.02,11.09, p = 0.36, I2 = 49%], TTR [MD 8.64, 95%CI -1.72,18.65, p = 0.10, I2 = 77%], circuit exchanges [OR 0.92, 95%CI 0.27,3.12, p = 0.90, I2 = 38%], HIT [OR 0.25, 95%CI 0.02,2.52, p = 0.24, I2 = 0%], minor bleeding events [OR 0.93, 95%CI 0.38,2.29, p = 0.87, I2 = 0%], hospital LOS [MD -2.93, 95%CI -9.01,3.15, p = 0.34, I2 = 45%], ICU LOS [MD -4.22, 95%CI -10.07,1.62, p = 0.16, I2 = 0%], mortality [OR 1.84, 95%CI 0.58,5.85, p = 0.30, I2 = 60%] and 30-day mortality [OR 0.75, 95%CI 0.38,1.48, p = 0.41, I2 = 0%]. Conclusion Bivalirudin probably be a potential choice for ECMO anticoagulation. However, based on the included studies' limitation, the superiority of bivalirudin over heparin for anticoagulation in the ECMO population still require further prospective randomized controlled studies before a definite conclusion.
Collapse
|
16
|
Heparin Versus Bivalirudin for Anticoagulation in Adult Extracorporeal Membrane Oxygenation: A Systematic Review and Meta-Analysis. ASAIO J 2023; 69:137-144. [PMID: 36355803 DOI: 10.1097/mat.0000000000001808] [Citation(s) in RCA: 9] [Impact Index Per Article: 9.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022] Open
Abstract
Extracorporeal membrane oxygenation (ECMO) poses unique thrombotic and hemorrhagic risks, and the optimal anticoagulant choice is unknown. We systematically searched Ovid EBM Reviews, Ovid Embase, Ovid Medline, Scopus, and Web of Science Core Collection for randomized-, crossover-, retrospective cohort-, or parallel-designed clinical studies of adult patients receiving ECMO that compared heparin recipients with bivalirudin recipients. Meta-analysis was performed with random-effects models. The ROBINS-I tool was used to assess the risk of bias. Six retrospective observational studies met the inclusion criteria for the qualitative summary. Five studies were suitable for meta-analysis. Those who received heparin were more likely to experience circuit-related thrombosis (odds ratio [OR] 2.05, 95% confidence interval [CI] 1.25-3.37, p = 0.005, I2 = 0%) and die (OR 1.62, 95% CI 1.19-2.21, p = 0.002, I2 = 0%) compared with those who received bivalirudin. There were no differences in major bleeding events between heparin and bivalirudin recipients (OR 1.83, 95% CI 0.55-6.09, p = 0.33, I2 = 82.7%). In retrospective settings compared with heparin anticoagulation, bivalirudin was associated with less circuit-related thrombotic events and greater survival in adults supported on ECMO, without contributing to more bleeding complications. Prospective controlled studies comparing heparin and bivalirudin in adult ECMO patients are warranted to corroborate these findings.
Collapse
|
17
|
Helms J, Frere C, Thiele T, Tanaka KA, Neal MD, Steiner ME, Connors JM, Levy JH. Anticoagulation in adult patients supported with extracorporeal membrane oxygenation: guidance from the Scientific and Standardization Committees on Perioperative and Critical Care Haemostasis and Thrombosis of the International Society on Thrombosis and Haemostasis. J Thromb Haemost 2023; 21:373-396. [PMID: 36700496 DOI: 10.1016/j.jtha.2022.11.014] [Citation(s) in RCA: 13] [Impact Index Per Article: 13.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/19/2022] [Revised: 11/08/2022] [Accepted: 11/09/2022] [Indexed: 01/26/2023]
Abstract
Anticoagulation of patients supported by extracorporeal membrane oxygenation is challenging because of a high risk of both bleeding and thrombotic complications, and often empirical. Practice in anticoagulation management is therefore highly variable. The scope of this guidance document is to provide clinicians with practical advice on the choice of an anticoagulant agent, dosing, and the optimal anticoagulant monitoring strategy during extracorporeal membrane oxygenation support in adult patients.
Collapse
Affiliation(s)
- Julie Helms
- Strasbourg University (UNISTRA), Strasbourg University Hospital, Medical Intensive Care Unit - NHC, INSERM (French National Institute of Health and Medical Research), UMR 1260, Regenerative Nanomedicine (RNM), FMTS, Strasbourg, France.
| | - Corinne Frere
- Sorbonne Université, UMRS 1166, AP-HP. Sorbonne Université, Pitié-Salpêtrière Hospital, Paris, France
| | - Thomas Thiele
- Institut für Transfusionsmedizin, Universitätsmedizin Rostock, Schillingallee 36, Rostock, Germany
| | - Kenichi A Tanaka
- Department of Anesthesiology, Universit of Oklahoma Health Sciences Center, Oklahoma City, OK, USA
| | - Matthew D Neal
- Department of Surgery, Trauma and Transfusion Medicine Research Center, University of Pittsburgh, Pittsburgh, PA, USA
| | - Marie E Steiner
- Division of Hematology/Oncology and Division of Critical Care, Department of Pediatrics, University of Minnesota, Minneapolis, MN, USA
| | - Jean M Connors
- Hematology Division, Brigham and Women's Hospital, Harvard Medical School, Boston, MA, USA
| | - Jerrold H Levy
- Department of Anesthesiology, Critical Care, and Surgery, Duke University School of Medicine, Durham, NC, USA
| |
Collapse
|
18
|
Spiegelburg DT, Mannes M, Schultze A, Scheibenberger F, Müller F, Klitzing A, Messerer DAC, Nilsson Ekdahl K, Nilsson B, Huber-Lang M, Braun CK. Impact of surface coating and systemic anticoagulants on hemostasis and inflammation in a human whole blood model. PLoS One 2023; 18:e0280069. [PMID: 36634087 PMCID: PMC9836312 DOI: 10.1371/journal.pone.0280069] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/15/2022] [Accepted: 12/20/2022] [Indexed: 01/13/2023] Open
Abstract
BACKGROUND Surface compatibility with blood is critical both for scientific investigations on hemostasis and clinical applications. Regarding in vitro and ex vivo investigations, minimal alteration in physiological hemostasis is of particular importance to draw reliable conclusions on the human coagulation system. At the same time, artificial coagulation activation must be avoided, which is relevant for the patient, for example to prevent stent graft occlusion. The aim was to evaluate the advantages and disadvantages of antithrombotic and antifouling surface coatings in the context of their suitability for ex vivo incubation and the study of coagulation properties. METHODS We investigated the impact of different protocols for surface coating of synthetic material and different anticoagulants on hemostasis and platelet activation in ex vivo human whole blood. Blood samples from healthy donors were incubated in coated microtubes on a rotating wheel at 37°C. Two protocols for surface coating were analyzed for hemostatic parameters and metabolic status, a heparin-based coating (CHC, Corline Heparin Conjugate) without further anticoagulation and a passivating coating (MPC, 2-methacryloyloxethyl phosphorylcholine) with added anticoagulants (enoxaparin, ENOX; or fondaparinux, FPX). Employing the MPC-based coating, the anticoagulants enoxaparin and fondaparinux were compared regarding their differential effects on plasmatic coagulation by thrombelastometry and on platelet activation by flowcytometry and platelet function assays. RESULTS Using the CHC coating, significant coagulation cascade activation was observed, whereas parameters remained mostly unchanged with MPC-based protocols. Extended incubation caused significantly elevated levels of the soluble membrane attack complex. Neither ENOX nor FPX caused a relevant impairment of platelet function or activation capacity and thrombelastometric parameters remained unchanged with both protocols. For translational purposes, we additionally modeled endotoxemia with the MPC-based protocols by incubating with lipopolysaccharide plus/minus thrombin. While coagulation parameters remained unchanged, elevated Interleukin 8 and Matrix Metalloproteinase 9 demonstrated preserved immune cell responsiveness. CONCLUSIONS The MPC-based protocols demonstrated better hemocompatibility compared to CHC, and ENOX and FPX proved useful for additional anticoagulation. Furthermore, this simple-to-use whole blood model may be useful for experimental analyses of the early coagulatory and immunological response without decalcification.
Collapse
Affiliation(s)
- Doreen Tabea Spiegelburg
- Institute for Clinical and Experimental Trauma Immunology, University Hospital of Ulm, Ulm, Germany
| | - Marco Mannes
- Institute for Clinical and Experimental Trauma Immunology, University Hospital of Ulm, Ulm, Germany
| | - Anke Schultze
- Institute for Clinical and Experimental Trauma Immunology, University Hospital of Ulm, Ulm, Germany
| | - Frieder Scheibenberger
- Institute for Clinical and Experimental Trauma Immunology, University Hospital of Ulm, Ulm, Germany
| | - Frederik Müller
- Institute for Clinical and Experimental Trauma Immunology, University Hospital of Ulm, Ulm, Germany
| | - Amadeo Klitzing
- Institute for Clinical and Experimental Trauma Immunology, University Hospital of Ulm, Ulm, Germany
| | - David Alexander Christian Messerer
- Institute for Clinical and Experimental Trauma Immunology, University Hospital of Ulm, Ulm, Germany
- Department of Transfusion Medicine and Hemostaseology, University Hospital of Erlangen, Friedrich-Alexander University Erlangen-Nürnberg (FAU), Erlangen, Germany
| | - Kristina Nilsson Ekdahl
- Centre of Biomaterials Chemistry, Linnaeus University, Kalmar, Sweden
- Rudbeck Laboratory, Department of Immunology, Genetics and Pathology, Uppsala, Sweden
| | - Bo Nilsson
- Rudbeck Laboratory, Department of Immunology, Genetics and Pathology, Uppsala, Sweden
| | - Markus Huber-Lang
- Institute for Clinical and Experimental Trauma Immunology, University Hospital of Ulm, Ulm, Germany
| | - Christian Karl Braun
- Institute for Clinical and Experimental Trauma Immunology, University Hospital of Ulm, Ulm, Germany
- * E-mail:
| |
Collapse
|
19
|
Kaushik S, Derespina KR, Chandhoke S, Shah DD, Cohen T, Shlomovich M, Medar SS, Peek GJ. Use of bivalirudin for anticoagulation in pediatric extracorporeal membrane oxygenation (ECMO). Perfusion 2023; 38:58-65. [PMID: 34318718 DOI: 10.1177/02676591211034314] [Citation(s) in RCA: 4] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/24/2023]
Abstract
This study describes the use of bivalirudin in children on extracorporeal membrane oxygenation (ECMO). Pediatric patients receiving bivalirudin were compared to patients receiving heparin as the anticoagulant on ECMO. Data was collected for children under 18 years of age supported by ECMO from January 2016 to December 2019. Data collected included demographics, diagnosis, ECMO indication, type, and duration, indication for bivalirudin use, dose range, activated partial thromboplastin time (aPTT) levels, minor and major bleeding, hemolysis, and mortality. Forty pediatric patients received ECMO; eight received bivalirudin primarily for anticoagulation. The median age was 4 months (IQR 0.5, 92) in the heparin cohort, 0.6 months (IQR 0.0, 80.0) in the primary bivalirudin cohort. The indication for ECMO was respiratory in 5 patients (18%) in the heparin group versus 6 (75%) in the primary bivalirudin group, cardiac in 18 (67%) in heparin versus 1 (12.5%) in primary bivalirudin, and extracorporeal-cardiopulmonary resuscitation (E-CPR) in 4 (15%) in heparin versus 1 (12.5%) in primary bivalirudin. Bivalirudin was the initial anticoagulant for eight patients (66.6%) while three (25%) were switched due to concern for heparin-induced thrombocytopenia (HIT) and one (8%) for heparin resistance. The median time to achieve therapeutic aPTT was 14.5 hours compared to 12 hours in the heparin group. Sixty-five percent of aPTT values in the bivalirudin and 44% of values in the heparin group were in the therapeutic range in the first 7 days. Patients with primary bivalirudin use had significantly lower dose requirement at 12 (p = 0.003), 36 (p = 0.007), and 48 (p = 0.0002) hours compared to patients with secondary use of bivalirudin. One patient (12.5%) had major bleeding, and two patients (25%) required circuit change in the primary bivalirudin cohort. Bivalirudin may provide stable and successful anticoagulation in children. Further large, multicenter studies are needed to confirm these findings.
Collapse
Affiliation(s)
- Shubhi Kaushik
- Division of Pediatric Critical Care Medicine, Kravis Children's Hospital at Mount Sinai, New York, NY, USA
| | - Kim R Derespina
- Division of Pediatric Critical Care Medicine, Kravis Children's Hospital at Mount Sinai, New York, NY, USA
| | - Swati Chandhoke
- Department of Pediatrics, Children's Hospital at Montefiore, Bronx, NY, USA
| | - Dhara D Shah
- Department of Pharmacy, Children's Hospital at Montefiore, Bronx, NY, USA
| | - Taylor Cohen
- Division of Cardiovascular Perfusion, Children's Hospital at Montefiore, Bronx, NY, USA
| | - Mark Shlomovich
- Division of Pediatric Critical Care Medicine, Children's Hospital at Montefiore, Bronx, NY, USA
| | - Shivanand S Medar
- Division of Pediatric Critical Care Medicine, Children's Hospital at Montefiore, Bronx, NY, USA.,Division of Pediatric Cardiology, Children's Hospital at Montefiore, Bronx, NY, USA
| | - Giles J Peek
- Congenital Heart Center, Shands Children's Hospital, University of Florida at Gainesville, Gainesville, FL, USA
| |
Collapse
|
20
|
Anticoagulation Management during Extracorporeal Membrane Oxygenation-A Mini-Review. MEDICINA (KAUNAS, LITHUANIA) 2022; 58:medicina58121783. [PMID: 36556985 PMCID: PMC9782867 DOI: 10.3390/medicina58121783] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/01/2022] [Revised: 11/25/2022] [Accepted: 11/29/2022] [Indexed: 12/12/2022]
Abstract
Extracorporeal membrane oxygenation (ECMO) has been established as a life-saving technique for patients with the most severe forms of respiratory or cardiac failure. It can, however, be associated with severe complications. Anticoagulation therapy is required to prevent ECMO circuit thrombosis. It is, however, associated with an increased risk of hemocoagulation disorders. Thus, safe anticoagulation is a cornerstone of ECMO therapy. The most frequently used anticoagulant is unfractionated heparin, which can, however, cause significant adverse effects. Novel drugs (e.g., argatroban and bivalirudin) may be superior to heparin in the better predictability of their effects, functioning independently of antithrombin, inhibiting thrombin bound to fibrin, and eliminating heparin-induced thrombocytopenia. It is also necessary to keep in mind that hemocoagulation tests are not specific, and their results, used for setting up the dosage, can be biased by many factors. The knowledge of the advantages and disadvantages of particular drugs, limitations of particular tests, and individualization are cornerstones of prevention against critical events, such as life-threatening bleeding or acute oxygenator failure followed by life-threatening hypoxemia and hemodynamic deterioration. This paper describes the effects of anticoagulant drugs used in ECMO and their monitoring, highlighting specific conditions and factors that might influence coagulation and anticoagulation measurements.
Collapse
|
21
|
Spencer BL, Mychaliska GB. Updates in Neonatal Extracorporeal Membrane Oxygenation and the Artificial Placenta. Clin Perinatol 2022; 49:873-891. [PMID: 36328605 DOI: 10.1016/j.clp.2022.07.002] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/27/2023]
Abstract
Extracorporeal life support, initially performed in neonates, is now commonly used for both pediatric and adult patients requiring pulmonary and/or cardiac support. Data suggests the clinical feasibility of Extracorporeal Membrane Oxygenation for premature infants (29-33 weeks estimated gestational age [EGA]). For extremely premature infants less than 28 weeks EGA, an artificial placenta has been developed to recreate the fetal environment. This approach is investigational but clinical translation is promising. In this article, we discuss the current state and advances in neonatal and "preemie Extracorporeal Membrane Oxygenation" and the development of an artificial placenta and its potential use in extremely premature infants.
Collapse
Affiliation(s)
- Brianna L Spencer
- Department of Surgery, University of Michigan, Michigan Medicine, Ann Arbor, MI, USA
| | - George B Mychaliska
- Section of Pediatric Surgery, Department of Surgery, Fetal Diagnosis and Treatment Center, University of Michigan Medical School, C.S. Mott Children's Hospital, Ann Arbor, MI, USA.
| |
Collapse
|
22
|
Comparison of Bivalirudin Versus Heparin for Anticoagulation During Extracorporeal Membrane Oxygenation. ASAIO J 2022; 69:396-401. [PMID: 36194483 DOI: 10.1097/mat.0000000000001814] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022] Open
Abstract
The effect and safety of bivalirudin compared with heparin in patients undergoing extracorporeal membrane oxygenation (ECMO) remains unclear. Therefore, we conducted a systematic review and meta-analysis to compare the effectiveness and safety of heparin and bivalirudin in patients who underwent ECMO. We searched Embase, the Cochrane Central Register of Controlled Trials, and MEDLINE. Inclusion criteria included patients (1) undergoing ECMO and (2) receiving bivalirudin or heparin. We excluded studies where the majority of patients switched heparin to bivalirudin or vice versa during the clinical course. The primary outcome was short-term mortality. We presented the results of all analyses with the use of random-effects models. Eleven studies reported short-term mortality. The use of bivalirudin was associated with significantly lower short-term mortality, compared with heparin (odds ratio: 0.71, 95% confidence interval, 0.55-0.92; p = 0.01, I2 = 7%). In this meta-analysis of observational studies, the use of bivalirudin was associated with significantly lower short-term mortality, compared with heparin. Further prospective studies are warranted to clarify this finding.
Collapse
|
23
|
M'Pembele R, Roth S, Metzger A, Nucaro A, Stroda A, Polzin A, Hollmann MW, Lurati Buse G, Huhn R. Evaluation of clinical outcomes in patients treated with heparin or direct thrombin inhibitors during extracorporeal membrane oxygenation: a systematic review and meta-analysis. Thromb J 2022; 20:42. [PMID: 35902857 PMCID: PMC9330661 DOI: 10.1186/s12959-022-00401-2] [Citation(s) in RCA: 12] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/12/2022] [Accepted: 07/15/2022] [Indexed: 11/16/2022] Open
Abstract
BACKGROUND The number of patients treated with extracorporeal membrane oxygenation (ECMO) devices is increasing. Anticoagulation therapy is crucial to prevent thrombosis during ECMO therapy. Predominantly, heparin has been used as primary anticoagulant but direct thrombin inhibitors (DTI) have been established as alternatives. The aim of this systematic review and meta-analysis was to evaluate clinical outcomes in patients treated with heparin compared to different DTI during ECMO. METHODS A systematic search was conducted. Full scientific articles were sought for inclusion if heparin anticoagulation was compared to DTI (argatroban/bivalirudin) in ECMO patients. Risk of bias was assessed by Newcastle Ottawa scale. Primary endpoint was in-hospital mortality. Bleeding events, thrombotic events, hours of ECMO support, days of hospital stay, percentage of time within therapeutic range and time to therapeutic range were extracted from full texts as secondary endpoints. Results were presented as Forrest-plots. GRADE was used for confidence assessment in outcomes. RESULTS Systematic search identified 4.385 records, thereof 18 retrospective studies for a total of 1942 patients, complied with the predefined eligibility criteria:15 studies investigated bivalirudin and 3 studies investigated argatroban versus heparin. Risk of bias was high for most studies. In-hospital mortality, major bleeding events and pump-related thrombosis were less frequent in DTI group as compared to heparin [mortality-OR 0.69, 95% CI 0.54-0.86; major bleeding-OR 0.48, 95% CI 0.29-0.81; pump thrombosis-OR 0.55, 95% CI 0.40-0.76]. Additionally, percentage of time within therapeutic range was higher for DTI [SMD 0.54, 95% CI 0.14-0.94]. GRADE approach revealed a very low level of certainty for each outcome. CONCLUSION In this meta-analysis, DTI and especially bivalirudin showed beneficial effects on clinical outcomes in ECMO patients as compared to heparin. However, due to the lack of randomized trials, certainty of evidence is low. TRIAL REGISTRATION This systematic review and meta-analysis was prospectively registered at PROSPERO data base (reference number CRD42021237252 ).
Collapse
Affiliation(s)
- René M'Pembele
- Department of Anesthesiology, Medical Faculty and University Hospital Duesseldorf, Heinrich-Heine-University, Duesseldorf, Germany.
| | - Sebastian Roth
- Department of Anesthesiology, Medical Faculty and University Hospital Duesseldorf, Heinrich-Heine-University, Duesseldorf, Germany
| | - Aljoscha Metzger
- Department of Anesthesiology, Medical Faculty and University Hospital Duesseldorf, Heinrich-Heine-University, Duesseldorf, Germany
| | - Anthony Nucaro
- Department of Anesthesiology, Medical Faculty and University Hospital Duesseldorf, Heinrich-Heine-University, Duesseldorf, Germany
| | - Alexandra Stroda
- Department of Anesthesiology, Medical Faculty and University Hospital Duesseldorf, Heinrich-Heine-University, Duesseldorf, Germany
| | - Amin Polzin
- Department of Cardiology, Pulmonology and Vascular Medicine, Medical Faculty and University Hospital Duesseldorf, Heinrich-Heine-University, Duesseldorf, Germany
| | - Markus W Hollmann
- Department of Anesthesiology, Amsterdam University Medical Center (AUMC), Location AMC, Amsterdam, The Netherlands
| | - Giovanna Lurati Buse
- Department of Anesthesiology, Medical Faculty and University Hospital Duesseldorf, Heinrich-Heine-University, Duesseldorf, Germany
| | - Ragnar Huhn
- Department of Anesthesiology, Medical Faculty and University Hospital Duesseldorf, Heinrich-Heine-University, Duesseldorf, Germany
- Department of Anesthesiology, Kerckhoff Heart and Lung Center, Bad Nauheim, Germany
| |
Collapse
|
24
|
Sheridan EA, Sekela ME, Pandya KA, Schadler A, Ather A. Comparison of Bivalirudin Versus Unfractionated Heparin for Anticoagulation in Adult Patients on Extracorporeal Membrane Oxygenation. ASAIO J 2022; 68:920-924. [PMID: 34669620 DOI: 10.1097/mat.0000000000001598] [Citation(s) in RCA: 15] [Impact Index Per Article: 7.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022] Open
Abstract
Extracorporeal membrane oxygenation (ECMO) contributes to coagulopathy, necessitating systemic anticoagulation to prevent thrombosis. Traditionally, unfractionated heparin (UFH) has been the anticoagulant of choice, however, due to many inadequacies new evidence suggests benefit with the use of direct thrombin inhibitors. This retrospective cohort sought to evaluate the safety and efficacy of bivalirudin compared to UFH in ECMO patients. Primary endpoints included incidence of bleeding and thrombosis. Percent time in therapeutic range (TR), time to achieve TR and number of dose titrations required to maintain TR were calculated to assess efficacy of institutional protocols. Overall incidence of thrombosis was low, with one event in the bivalirudin group and no events in the UFH group. No difference was found in rates of bleeding between groups (6% vs . 10%, P = 0.44). Bivalirudin yielded higher percent time in TR (86% vs. 33%, P < 0.001), faster time to TR (2 vs . 18 hr, P < 0.001) and required fewer dose adjustments to maintain TR (2 vs . 11, P < 0.001) compared to UFH. These results suggest bivalirudin and UFH are associated with similar rates of bleeding and thrombosis in patients requiring ECMO support. Our results demonstrate the favorable pharmacokinetic profile of bivalirudin, and its ability to consistently maintain TR when compared to UFH.
Collapse
Affiliation(s)
- Erica A Sheridan
- From the Department of Pharmacy Services, ProMedica Toledo Hospital, Toledo, Ohio
| | - Michael E Sekela
- Division of Cardiothoracic Surgery, University of Kentucky Healthcare, Lexington, Kentucky
| | - Komal A Pandya
- Department of Pharmacy Services, University of Kentucky Healthcare, Lexington, Kentucky
- College of Pharmacy, University of Kentucky, Lexington, Kentucky
| | - Aric Schadler
- College of Pharmacy, University of Kentucky, Lexington, Kentucky
- Kentucky Children's Hospital, University of Kentucky Healthcare, Lexington, Kentucky, USA
| | - Ayesha Ather
- Department of Pharmacy Services, University of Kentucky Healthcare, Lexington, Kentucky
- College of Pharmacy, University of Kentucky, Lexington, Kentucky
| |
Collapse
|
25
|
Hanna DJ, Torbic H, Militello M, Strnad K, Krishnan S, Hohlfelder B. Evaluation of anticoagulation with bivalirudin for heparin-induced thrombocytopenia during extracorporeal membrane oxygenation. Int J Artif Organs 2022; 45:688-694. [PMID: 35708334 DOI: 10.1177/03913988221106225] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
Abstract
INTRODUCTION Unfractionated heparin is the most commonly utilized anticoagulant in extracorporeal membrane oxygenation (ECMO) due to clinician familiarity, ease of reversal, and low cost compared to alternative agents. However, heparin's anticoagulant effect can be unpredictable and its use accompanies a risk of heparin induced thrombocytopenia (HIT). Successful use of bivalirudin as an alternative to heparin in non-HIT ECMO patients has previously been described. However, there is a paucity of data regarding its utilization in patients with confirmed HIT on ECMO. METHODS This single-center retrospective chart review at Cleveland Clinic Main Campus included 12 ECMO patients who were managed with bivalirudin for a new diagnosis of HIT. Descriptive statistical analyses were performed utilizing median with interquartile range and number with percent as appropriate. RESULTS Of the 12 patients included, median ECMO duration was 328.5 (218.8-502.1) h and venoarterial ECMO was the most common configuration. No patients experienced the primary outcome of in-circuit thrombosis while on bivalirudin. One patient developed a deep vein thrombosis 22.5 h after switching from heparin to bivalirudin. Major bleeding occurred during bivalirudin therapy in 8 (66.7%) patients. CONCLUSIONS Overall, our study results suggest that bivalirudin is effective for the management of HIT and did not show evidence of in-circuit thrombosis. A high incidence of major bleeding was observed with bivalirudin use within this study. Clinicians should view bivalirudin as an acceptable agent for the treatment of HIT in the ECMO population, but must consider bleeding risk given the lack of effective reversal agents.
Collapse
Affiliation(s)
- Dylan J Hanna
- Department of Pharmacy, Cleveland Clinic, Cleveland, OH, USA
| | - Heather Torbic
- Department of Pharmacy, Cleveland Clinic, Cleveland, OH, USA
| | - Mike Militello
- Department of Pharmacy, Cleveland Clinic, Cleveland, OH, USA
| | - Kyle Strnad
- Department of Pharmacy, Cleveland Clinic, Cleveland, OH, USA
| | | | - Ben Hohlfelder
- Department of Pharmacy, Cleveland Clinic, Cleveland, OH, USA
| |
Collapse
|
26
|
Ma M, Liang S, Zhu J, Dai M, Jia Z, Huang H, He Y. The Efficacy and Safety of Bivalirudin Versus Heparin in the Anticoagulation Therapy of Extracorporeal Membrane Oxygenation: A Systematic Review and Meta-Analysis. Front Pharmacol 2022; 13:771563. [PMID: 35496287 PMCID: PMC9048024 DOI: 10.3389/fphar.2022.771563] [Citation(s) in RCA: 18] [Impact Index Per Article: 9.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/01/2021] [Accepted: 03/29/2022] [Indexed: 12/12/2022] Open
Abstract
Background: Bivalirudin is a direct thrombin inhibitor (DTI) that can be an alternative to unfractionated heparin (UFH). The efficacy and safety of bivalirudin in anticoagulation therapy in extracorporeal membrane oxygenation (ECMO) remain unknown. Methods: This study followed the preferred reporting items for systematic reviews and meta-analyses (PRISMA) guidelines. A systematic literature search was performed in PubMed, EMBASE, and The Cochrane Library databases to identify all relevant original studies estimating bivalirudin’s efficacy and safety versus UFH as anticoagulation therapy in ECMO. The time limit for searching is from the search beginning to June 2021. Two researchers independently screened the literature, extracted data and evaluated the risk of bias of the included studies. The meta-analysis (CRD42020214713) was performed via the RevMan version 5.3.5 Software and STATA version 15.1 Software. Results: Ten articles with 847 patients were included for the quantitative analysis. Bivalirudin can significantly reduce the incidence of major bleeding in children (I2 = 48%, p = 0.01, odd ratio (OR) = 0.17, 95% confidence interval (CI): 0.04–0.66), patient thrombosis (I2 = 0%, p = 0.02, OR = 0.58, 95% CI: 0.37–0.93), in-circuit thrombosis/interventions (I2 = 0%, p = 0.0005, OR = 0.40, 95% CI: 0.24–0.68), and in-hospital mortality (I2 = 0%, p = 0.007, OR = 0.64, 95% CI: 0.46–0.88). Also, comparable clinical outcomes were observed in the incidence of major bleeding in adults (I2 = 48%, p = 0.65, OR = 0.87, 95% CI: 0.46–1.62), 30-day mortality (I2 = 0%, p = 0.61, OR = 0.83, 95% CI: 0.41–1.68), and ECMO duration in adults (I2 = 41%, p = 0.75, mean difference (MD) = −3.19, 95% CI: −23.01–16.63) and children (I2 = 76%, p = 0.65, MD = 40.33, 95% CI:−135.45–216.12). Conclusions: Compared with UFH, bivalirudin can be a safe and feasible alternative anticoagulant option to UFH as anticoagulation therapy in ECMO, especially for heparin resistance (HR) and heparin-induced thrombocytopenia (HIT) cases.
Collapse
Affiliation(s)
- Min Ma
- Department of Cardiology, West China Hospital of Sichuan University, Chengdu, China
- Department of Cardiology, The Sixth People’s Hospital of Chengdu, Chengdu, China
| | - Shichu Liang
- Department of Cardiology, West China Hospital of Sichuan University, Chengdu, China
| | - Jingbo Zhu
- Department of Cardiology, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China
| | - Manyu Dai
- Department of Cardiology, The First Affiliated Hospital of Anhui Medical University, Hefei, China
| | - Zhuoran Jia
- Department of Cardiology, The First Affiliated Hospital of Anhui Medical University, Hefei, China
| | - He Huang
- Department of Cardiology, West China Hospital of Sichuan University, Chengdu, China
- *Correspondence: He Huang, ; Yong He,
| | - Yong He
- Department of Cardiology, West China Hospital of Sichuan University, Chengdu, China
- *Correspondence: He Huang, ; Yong He,
| |
Collapse
|
27
|
Geli J, Capoccia M, Maybauer DM, Maybauer MO. Direct Thrombin Inhibition in Extracorporeal Membrane Oxygenation. Int J Artif Organs 2022; 45:652-655. [PMID: 35411823 DOI: 10.1177/03913988221091292] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
Abstract
Extracorporeal membrane oxygenation (ECMO) is a widely used technique to provide circulatory and/or respiratory support in critically ill patients. ECMO treatment usually necessitates systemic anticoagulation. Unfractionated Heparin (UFH) is a commonly used anticoagulant in patients on ECMO support. In situations where UFH is contraindicated, alternative anticoagulation strategies can be applied, such as the use of direct thrombin inhibitors (DTI). Bivalirudin and argatroban are the most widely used DTIs. In this report we give account of the current evidence regarding dosing, monitoring and complications associated with the use of these agents in ECMO dependent patients.
Collapse
Affiliation(s)
- Janos Geli
- Department of Anesthesiology, The University of Texas Medical Branch, Galveston, TX, USA
| | - Massimo Capoccia
- Leeds General Infirmary, Leeds Teaching Hospitals NHS Trust, Leeds, UK
| | - Dirk M Maybauer
- Department of Anaesthesia and Intensive Care, Philipps University, Marburg, Germany
| | - Marc O Maybauer
- Department of Anaesthesia and Intensive Care, Philipps University, Marburg, Germany.,Critical Care Research Group, The Prince Charles Hospital, University of Queensland, Brisbane, Australia.,Advanced Critical Care and Acute Circulatory Support, Nazih Zuhdi Transplant Institute, Integris Health, Oklahoma City, OK, USA.,Department of Medicine, Oklahoma State University Health Science Center, Tulsa, OK, USA
| |
Collapse
|
28
|
Brokmeier HM, Wieruszewski ED, Nei SD, Loftsgard TO, Wieruszewski PM. Hemostatic Management in Extracorporeal Membrane Oxygenation. Crit Care Nurs Q 2022; 45:132-143. [PMID: 35212653 DOI: 10.1097/cnq.0000000000000396] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
Abstract
The use of extracorporeal membrane oxygenation (ECMO) for acute cardiac and/or respiratory failure has grown exponentially in the past several decades. Systemic anticoagulation is a fundamental element of caring for ECMO patients. Hemostatic management during ECMO walks a fine line to balance the risk of safe and effective anticoagulant delivery to mitigate thromboembolic complications and minimizing hemorrhagic sequelae. This review discusses the pharmacology, monitoring parameters, and special considerations for anticoagulation in patients requiring ECMO.
Collapse
Affiliation(s)
- Hannah M Brokmeier
- Departments of Pharmacy (Drs Brokmeier, E. D. Wieruszewski, Nei, and P. M. Wieruszewski), Cardiovascular Surgery (Mr Loftsgard), and Anesthesiology (Dr P. M. Wieruszewski), Mayo Clinic, Rochester, Minnesota
| | | | | | | | | |
Collapse
|
29
|
Abstract
DISCLAIMER These guidelines for adult and pediatric anticoagulation for extracorporeal membrane oxygenation are intended for educational use to build the knowledge of physicians and other health professionals in assessing the conditions and managing the treatment of patients undergoing ECLS / ECMO and describe what are believed to be useful and safe practice for extracorporeal life support (ECLS, ECMO) but these are not necessarily consensus recommendations. The aim of clinical guidelines are to help clinicians to make informed decisions about their patients. However, adherence to a guideline does not guarantee a successful outcome. Ultimately, healthcare professionals must make their own treatment decisions about care on a case-by-case basis, after consultation with their patients, using their clinical judgment, knowledge and expertise. These guidelines do not take the place of physicians' and other health professionals' judgment in diagnosing and treatment of particular patients. These guidelines are not intended to and should not be interpreted as setting a standard of care or be deemed inclusive of all proper methods of care nor exclusive of other methods of care reasonably directed to obtaining the same results. The ultimate judgment must be made by the physician and other health professionals and the patient in light of all the circumstances presented by the individual patient, and the known variability and biological behavior of the clinical condition. These guidelines reflect the data at the time the guidelines were prepared; the results of subsequent studies or other information may cause revisions to the recommendations in these guidelines to be prudent to reflect new data, but ELSO is under no obligation to provide updates. In no event will ELSO be liable for any decision made or action taken in reliance upon the information provided through these guidelines.
Collapse
|
30
|
Li MJ, Shi JY, Zhang JH. Bivalirudin versus Heparin in Pediatric and Adult Patients on Extracorporeal Membrane Oxygenation: A Meta-analysis. Br J Clin Pharmacol 2022; 88:2605-2616. [PMID: 35098565 DOI: 10.1111/bcp.15251] [Citation(s) in RCA: 10] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/31/2021] [Revised: 11/20/2021] [Accepted: 01/14/2022] [Indexed: 12/01/2022] Open
Abstract
AIMS Unfractionated heparin (UFH) has been the primary anticoagulant of choice on extracorporeal membrane oxygenation (ECMO). However, it is debatable whether bivalirudin (BIV), a direct thrombin inhibitor, may be considered a better alternative anticoagulant option. METHODS We searched Embase, Pubmed, Cochrane library, Clinicaltrials.gov, CNKI, and Wanfang databases up to June 15, 2021. Randomized controlled trials (RCTs) and observational studies were considered eligible for inclusion. Random-effects meta-analyses, including subgroup analyses, were conducted. RESULTS A total of 9 studies containing 994 patients were enrolled. All articles were retrospective cohort studies. Compared with UFH, BIV was associated with lower risks of major bleeding (risk ratio [RR]: 0.32, 95% confidence interval [CI] 0.22-0.49), ECMO in-circuit thrombosis (RR: 0.57, 95% CI 0.43-0.74), stroke (RR: 0.52, 95% CI 0.29-0.95), in-hospital mortality (RR: 0.82, 95% CI 0.69-0.99) and higher rates of survival to ECMO decannulation (RR: 1.18, 95% CI 1.03-1.34). Pooled risk estimates did not show a significant association with clinical thrombotic events (RR: 0.69, 95% CI 0.45-1.07). Moreover, BIV was associated with a lower risk of ECMO in-circuit thrombosis and in-hospital mortality in the adult subgroup but not in the pediatric subgroup. However, leave-one-out sensitivity analyses indicated that the results of stroke, survival to ECMO decannulation and in-hospital mortality should be interpreted with caution. CONCLUSIONS BIV appears to be a potential alternative to UFH in pediatric and adult patients requiring ECMO.
Collapse
Affiliation(s)
- Mei-Juan Li
- Department of Pharmacy, First Hospital of Shanxi Medical University, Shanxi, China
| | - Jin-Ying Shi
- Department of Neurology, and Fujian Key Laboratory of Molecular Neurology, Fujian Medical University Union Hospital, Fujian, China
| | - Jin-Hua Zhang
- Department of Pharmacy, Fujian Medical University Union Hospital, Fujian, China
| |
Collapse
|
31
|
Liu L, Liu F, Tan J, Zhao L. Bivalirudin versus heparin in adult and pediatric patients with extracorporeal membrane oxygenation therapy: a systematic review and meta-analysis. Pharmacol Res 2022; 177:106089. [PMID: 35065202 DOI: 10.1016/j.phrs.2022.106089] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/30/2021] [Revised: 01/16/2022] [Accepted: 01/17/2022] [Indexed: 11/18/2022]
Abstract
BACKGROUND Our study sought to investigate the efficacy and safety of bivalirudin versus those of unfractionated heparin (UFH) in patients undergoing extracorporeal membrane oxygenation (ECMO). METHODS PubMed, EMBASE and Cochrane Library were searched for studies enrolling ECMO patients on bivalirudin and UFH (from inception till July 2021). Meta-analysis was conducted. The I2 statistic and p value were used in measuring heterogeneity, and random effects or fixed-effect model was adopted. The Newcastle-Ottawa Scale was used for the risk of bias assessment. Sensitivity and subgroup analyses were undertaken. We performed Egger's test to evaluate publication bias. RESULTS Fourteen eligible retrospective observational studies with 1501 subjects were identified. Compared with UFH, bivalirudin significantly reduced the risk of in-circuit thrombosis (OR = 0.44, 95% CI [0.31-0.61], p = 0.000), thrombosis (OR = 0.61, 95% CI [0.45-0.83], p = 0.002) and hospital mortality (OR = 0.78, 95% CI [0.61-0.99], p = 0.04) and had a positive impact on survival ECMO (OR = 1.50, 95% CI [1.04-2.16], p = 0.032). Decrease in risk of bleeding (OR = 0.36, 95% CI [0.14-0.91], p = 0.031) associated with bivalirudin was observed. Sources of heterogeneity were identified, and sensitivity analysis revealed similar results. CONCLUSION Our meta-analysis suggested that bivalirudin was associated with the decreased risk of in-circuit thrombosis, thrombosis, hospital mortality and bleeding in patients on ECMO and improved survival ECMO, indicating the superiority of bivalirudin to UFH in terms of efficacy and safety.
Collapse
Affiliation(s)
- Liyao Liu
- The Department of Emergency & Critical Care Medicine, The First Affiliated Hospital of Chongqing Medical University, Chongqing, China
| | - Feng Liu
- The Department of Emergency & Critical Care Medicine, The First Affiliated Hospital of Chongqing Medical University, Chongqing, China
| | - Jixiang Tan
- The Department of Emergency & Critical Care Medicine, The First Affiliated Hospital of Chongqing Medical University, Chongqing, China.
| | - Lin Zhao
- The Department of Emergency & Critical Care Medicine, The First Affiliated Hospital of Chongqing Medical University, Chongqing, China.
| |
Collapse
|
32
|
Li DH, Sun MW, Zhang JC, Zhang C, Deng L, Jiang H. Is bivalirudin an alternative anticoagulant for extracorporeal membrane oxygenation (ECMO) patients? A systematic review and meta-analysis. Thromb Res 2021; 210:53-62. [PMID: 35007937 DOI: 10.1016/j.thromres.2021.12.024] [Citation(s) in RCA: 25] [Impact Index Per Article: 8.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/25/2021] [Revised: 12/17/2021] [Accepted: 12/22/2021] [Indexed: 01/21/2023]
Abstract
BACKGROUND Anticoagulation is important for extracorporeal membrane oxygenation (ECMO). Heparin is widely used; however, in some cases, it is not suitable for patients. Bivalirudin has been recently proposed for ECMO patients, and there is no evidence regarding its effectiveness and safety. OBJECTIVE We aimed to systematically review the effectiveness and safety of bivalirudin in ECMO patients. STUDY DESIGN AND METHODS PubMed, Web of Science, Cochrane Library, and EMBASE were searched to find relevant research on the use of bivalirudin versus heparin for anticoagulation in ECMO patients. Outcomes included in-hospital mortality, ECMO duration, major bleeding events, thrombosis events and circuit intervention events. Types of studies included randomized control trials (RCTs), cohort studies, and case-control studies. Case reports, studies lacking comparison with heparin, and where patients transitioned between heparin and bivalirudin, were excluded. Publication bias was evaluated when the number of included studies was more than ten. Sensitivity analysis was performed to examine the stability of the results. RESULTS Ten articles were selected, and nine articles were included in the meta-analysis. The results of the meta-analysis showed hospital mortality [OR = 0.65, 95%CI (0.44, 0.95), P = 0.03] and thrombosis events decreased (OR = 0.55, 95%CI [0.37, 0.83], P = 0.004) in bivalirudin group compared with heparin in adult patients. Major bleeding events (OR = 0.66, 95%CI [0.17, 2.55], P = 0.55), ECMO duration (MD = 18.92, 95%CI [-29.33, 67.17], P = 0.44) and circuit intervention events (OR = 1.67, 95%CI [0.54, 5.18], P = 0.37) in the bivalirudin group was not statistically significant compared with the heparin group. CONCLUSION Bivalirudin may provide survival benefits and reduce thrombosis in adult patients on ECMO compared with heparin. There is no difference in treating major bleeding events between bivalirudin and heparin group. However, because all included studies were retrospective observational studies, the evidence level of this systematic review is low and heterogeneity could not be avoided. More high-quality clinical studies are urgently needed to confirm these benefits.
Collapse
Affiliation(s)
- Di-Huan Li
- Department of Institute for Emergency and Disaster Medicine, Sichuan Provincial People's Hospital, University of Electronic Science and Technology of China, Chengdu, China
| | - Ming-Wei Sun
- Sichuan Provincial Center for Emergency Medicine, Sichuan Provincial People's Hospital, University of Electronic Science and Technology of China, Chengdu, China; Sichuan Provincial Research Center for Emergency Medicine and Critical Illness, Sichuan Provincial People's Hospital, University of Electronic Science and Technology of China, Chengdu, China
| | - Jian-Cheng Zhang
- Sichuan Provincial Center for Emergency Medicine, Sichuan Provincial People's Hospital, University of Electronic Science and Technology of China, Chengdu, China
| | - Chi Zhang
- Department of Institute for Emergency and Disaster Medicine, Sichuan Provincial People's Hospital, University of Electronic Science and Technology of China, Chengdu, China
| | - Lei Deng
- Sichuan Provincial Center for Emergency Medicine, Sichuan Provincial People's Hospital, University of Electronic Science and Technology of China, Chengdu, China
| | - Hua Jiang
- Department of Institute for Emergency and Disaster Medicine, Sichuan Provincial People's Hospital, University of Electronic Science and Technology of China, Chengdu, China; Sichuan Provincial Research Center for Emergency Medicine and Critical Illness, Sichuan Provincial People's Hospital, University of Electronic Science and Technology of China, Chengdu, China.
| |
Collapse
|
33
|
Anandamurthy B, Shaw A, Skubas NJ. Society of Cardiovascular Anesthesiologists Consensus Statement on Intraoperative Management of Extracorporeal Membrane Oxygenation: A New Instrument in the Perioperative Medicine Toolkit. Anesth Analg 2021; 133:1456-1458. [PMID: 34784332 DOI: 10.1213/ane.0000000000005792] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
Affiliation(s)
| | - Andrew Shaw
- From the Departments of Intensive Care and Resuscitation
| | - Nikolaos J Skubas
- Cardiothoracic Anesthesiology, Anesthesiology Institute, Cleveland Clinic, Cleveland, Ohio
| |
Collapse
|
34
|
Elliott A, Dahyia G, Kalra R, Alexy T, Bartos J, Kosmopoulos M, Yannopoulos D. Extracorporeal Life Support for Cardiac Arrest and Cardiogenic Shock. US CARDIOLOGY REVIEW 2021. [DOI: 10.15420/usc.2021.13] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022] Open
Abstract
The rising incidence and recognition of cardiogenic shock has led to an increase in the use of veno-arterial extracorporeal membrane oxygenation (VA-ECMO). As clinical experience with this therapy has increased, there has also been a rapid growth in the body of observational and randomized data describing the clinical and logistical considerations required to institute a VA-ECMO program with successful clinical outcomes. The aim of this review is to summarize this contemporary data in the context of four key themes that pertain to VA-ECMO programs: the principles of patient selection; basic hemodynamic and technical principles underlying VA-ECMO; contraindications to VA-ECMO therapy; and common complications and intensive care considerations that are encountered in the setting of VA-ECMO therapy.
Collapse
Affiliation(s)
- Andrea Elliott
- Department of Medicine, Division of Cardiology, University of Minnesota, Minneapolis, MN
| | - Garima Dahyia
- Department of Medicine, Division of Cardiology, University of Minnesota, Minneapolis, MN
| | - Rajat Kalra
- Department of Medicine, Division of Cardiology, University of Minnesota, Minneapolis, MN
| | - Tamas Alexy
- Department of Medicine, Division of Cardiology, University of Minnesota, Minneapolis, MN
| | - Jason Bartos
- Department of Medicine, Division of Cardiology, University of Minnesota, Minneapolis, MN
| | - Marinos Kosmopoulos
- Department of Medicine, Division of Cardiology, Center for Resuscitation Medicine, University of Minnesota, Minneapolis, MN
| | - Demetri Yannopoulos
- Department of Medicine, Division of Cardiology, University of Minnesota, Minneapolis, MN
| |
Collapse
|
35
|
Tahan MRE. The Emerging Role of Bivalirudin for Therapeutic Anticoagulation in Patients With Coronavirus Disease 2019 Requiring Extracorporeal Membrane Oxygenation Support: Is It Time to Change the Routine Practice? J Cardiothorac Vasc Anesth 2021; 36:419-421. [PMID: 34903456 PMCID: PMC8579702 DOI: 10.1053/j.jvca.2021.11.003] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Download PDF] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/31/2021] [Accepted: 11/03/2021] [Indexed: 12/02/2022]
Affiliation(s)
- Mohamed R El Tahan
- Anesthesiology Department, College of Medicine, Imam Abdulrahman Bin Faisal University, Dammam, Saudi Arabia.
| |
Collapse
|
36
|
Bivalirudin Superior to Heparin for Extracorporeal Membrane Oxygenation: Not So Fast. Crit Care Med 2021; 49:e1057-e1058. [PMID: 34529629 DOI: 10.1097/ccm.0000000000005103] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
|
37
|
Willers A, Arens J, Mariani S, Pels H, Maessen JG, Hackeng TM, Lorusso R, Swol J. New Trends, Advantages and Disadvantages in Anticoagulation and Coating Methods Used in Extracorporeal Life Support Devices. MEMBRANES 2021; 11:membranes11080617. [PMID: 34436380 PMCID: PMC8399034 DOI: 10.3390/membranes11080617] [Citation(s) in RCA: 23] [Impact Index Per Article: 7.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 07/20/2021] [Revised: 08/06/2021] [Accepted: 08/08/2021] [Indexed: 11/16/2022]
Abstract
The use of extracorporeal life support (ECLS) devices has significantly increased in the last decades. Despite medical and technological advancements, a main challenge in the ECLS field remains the complex interaction between the human body, blood, and artificial materials. Indeed, blood exposure to artificial surfaces generates an unbalanced activation of the coagulation cascade, leading to hemorrhagic and thrombotic events. Over time, several anticoagulation and coatings methods have been introduced to address this problem. This narrative review summarizes trends, advantages, and disadvantages of anticoagulation and coating methods used in the ECLS field. Evidence was collected through a PubMed search and reference scanning. A group of experts was convened to openly discuss the retrieved references. Clinical practice in ECLS is still based on the large use of unfractionated heparin and, as an alternative in case of contraindications, nafamostat mesilate, bivalirudin, and argatroban. Other anticoagulation methods are under investigation, but none is about to enter the clinical routine. From an engineering point of view, material modifications have focused on commercially available biomimetic and biopassive surfaces and on the development of endothelialized surfaces. Biocompatible and bio-hybrid materials not requiring combined systemic anticoagulation should be the future goal, but intense efforts are still required to fulfill this purpose.
Collapse
Affiliation(s)
- Anne Willers
- ECLS Centre, Cardio-Thoracic Surgery, and Cardiology Department, Heart & Vascular Centre, Maastricht University Medical Centre (MUMC), P. Debyelaan 25, 6229 HX Maastricht, The Netherlands; (S.M.); (J.G.M.); (R.L.)
- Cardiovascular Research Institute Maastricht (CARIM), Maastricht University, Universiteitssingel 50, 6229 ER Maastricht, The Netherlands;
- Correspondence: (A.W.); (J.S.); Tel.: +31-(0)649-07-9752 (A.W.); +49-(911)-398-0 (J.S.)
| | - Jutta Arens
- Engineering Organ Support Technologies Group, Department of Biomechanical Engineering, Faculty of Engineering Technology, University of Twente, P.O. Box 217, 7500 AE Enschede, The Netherlands; (J.A.); (H.P.)
| | - Silvia Mariani
- ECLS Centre, Cardio-Thoracic Surgery, and Cardiology Department, Heart & Vascular Centre, Maastricht University Medical Centre (MUMC), P. Debyelaan 25, 6229 HX Maastricht, The Netherlands; (S.M.); (J.G.M.); (R.L.)
- Cardiovascular Research Institute Maastricht (CARIM), Maastricht University, Universiteitssingel 50, 6229 ER Maastricht, The Netherlands;
| | - Helena Pels
- Engineering Organ Support Technologies Group, Department of Biomechanical Engineering, Faculty of Engineering Technology, University of Twente, P.O. Box 217, 7500 AE Enschede, The Netherlands; (J.A.); (H.P.)
| | - Jos G. Maessen
- ECLS Centre, Cardio-Thoracic Surgery, and Cardiology Department, Heart & Vascular Centre, Maastricht University Medical Centre (MUMC), P. Debyelaan 25, 6229 HX Maastricht, The Netherlands; (S.M.); (J.G.M.); (R.L.)
- Cardiovascular Research Institute Maastricht (CARIM), Maastricht University, Universiteitssingel 50, 6229 ER Maastricht, The Netherlands;
| | - Tilman M. Hackeng
- Cardiovascular Research Institute Maastricht (CARIM), Maastricht University, Universiteitssingel 50, 6229 ER Maastricht, The Netherlands;
- Department of Biochemistry, Faculty of Health, Medicine and Life, Maastricht University, P.O. Box 616, 6200 MD Maastricht, The Netherlands
| | - Roberto Lorusso
- ECLS Centre, Cardio-Thoracic Surgery, and Cardiology Department, Heart & Vascular Centre, Maastricht University Medical Centre (MUMC), P. Debyelaan 25, 6229 HX Maastricht, The Netherlands; (S.M.); (J.G.M.); (R.L.)
- Cardiovascular Research Institute Maastricht (CARIM), Maastricht University, Universiteitssingel 50, 6229 ER Maastricht, The Netherlands;
| | - Justyna Swol
- Department of Respiratory Medicine, Allergology and Sleep Medicine, Paracelsus Medical University, Ernst-Nathan Str. 1, 90419 Nuremberg, Germany
- Correspondence: (A.W.); (J.S.); Tel.: +31-(0)649-07-9752 (A.W.); +49-(911)-398-0 (J.S.)
| |
Collapse
|
38
|
Extracorporeal Membrane Oxygenation Complications in Heparin- and Bivalirudin-Treated Patients. Crit Care Explor 2021; 3:e0485. [PMID: 34278315 PMCID: PMC8280085 DOI: 10.1097/cce.0000000000000485] [Citation(s) in RCA: 18] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022] Open
Abstract
Supplemental Digital Content is available in the text. OBJECTIVES: Extracorporeal membrane oxygenation is a potentially life-saving intervention in refractory cardiopulmonary failure, but it requires anticoagulation to prevent circuit thromboses, which exposes the patient to hemorrhagic complications. Heparin has traditionally been the anticoagulant of choice, but the direct thrombin inhibitor bivalirudin is routinely used in cases of heparin-induced thrombocytopenia and has been suggested as a superior choice. We sought to examine the timing of hemorrhagic and thrombotic complications after extracorporeal membrane oxygenation cannulation and to compare the rates of such complications between patients anticoagulated with heparin versus bivalirudin. DESIGN: Retrospective cohort study. SETTING: Johns Hopkins Hospital patients between January 2016 and July 2019. PATIENTS: Adult (> 18 yr) extracorporeal membrane oxygenation patients. INTERVENTIONS: Patients were anticoagulated either with heparin or bivalirudin. MEASUREMENTS AND MAIN RESULTS: We compared rates of hemorrhagic and thrombotic complications by time on heparin versus bivalirudin and characterized the average time to each complication. Of 144 extracorporeal membrane oxygenation patients (mean age 55.3 yr; 58% male), 41% were on central venoarterial extracorporeal membrane oxygenation, 40% on peripheral venoarterial extracorporeal membrane oxygenation, and 19% on venovenous extracorporeal membrane oxygenation. Thirteen patients (9%) received bivalirudin during their extracorporeal membrane oxygenation run, due to concern for (n = 8) or diagnosis of (n = 4) heparin-induced thrombocytopenia or for heparin resistance (n = 1). The rate of hemorrhagic or thrombotic complications did not differ between heparin (0.13/d) and bivalirudin (0.06/d; p = 0.633), but patients on bivalirudin received significantly fewer blood transfusions (1.0 U of RBCs/d vs 2.9/d on heparin; p < 0.001). CONCLUSIONS: Our results confirm the safety and efficacy of bivalirudin as an alternative anticoagulant in extracorporeal membrane oxygenation and suggest a potential benefit in less blood product transfusion, although prospective studies are needed to evaluate the true effect of bivalirudin versus the disease processes that prompted its use in our study population.
Collapse
|
39
|
Tsangaris A, Alexy T, Kalra R, Kosmopoulos M, Elliott A, Bartos JA, Yannopoulos D. Overview of Veno-Arterial Extracorporeal Membrane Oxygenation (VA-ECMO) Support for the Management of Cardiogenic Shock. Front Cardiovasc Med 2021; 8:686558. [PMID: 34307500 PMCID: PMC8292640 DOI: 10.3389/fcvm.2021.686558] [Citation(s) in RCA: 54] [Impact Index Per Article: 18.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/27/2021] [Accepted: 06/11/2021] [Indexed: 12/25/2022] Open
Abstract
Cardiogenic shock accounts for ~100,000 annual hospital admissions in the United States. Despite improvements in medical management strategies, in-hospital mortality remains unacceptably high. Multiple mechanical circulatory support devices have been developed with the aim to provide hemodynamic support and to improve outcomes in this population. Veno-arterial extracorporeal membrane oxygenation (VA-ECMO) is the most advanced temporary life support system that is unique in that it provides immediate and complete hemodynamic support as well as concomitant gas exchange. In this review, we discuss the fundamental concepts and hemodynamic aspects of VA-ECMO support in patients with cardiogenic shock of various etiologies. In addition, we review the common indications, contraindications and complications associated with VA-ECMO use.
Collapse
Affiliation(s)
- Adamantios Tsangaris
- Division of Cardiology, Department of Medicine, University of Minnesota, Minneapolis, MN, United States
| | - Tamas Alexy
- Division of Cardiology, Department of Medicine, University of Minnesota, Minneapolis, MN, United States
| | - Rajat Kalra
- Division of Cardiology, Department of Medicine, University of Minnesota, Minneapolis, MN, United States
| | - Marinos Kosmopoulos
- Center for Resuscitation Medicine, University of Minnesota School of Medicine, Minneapolis, MN, United States
| | - Andrea Elliott
- Division of Cardiology, Department of Medicine, University of Minnesota, Minneapolis, MN, United States
| | - Jason A Bartos
- Division of Cardiology, Department of Medicine, University of Minnesota, Minneapolis, MN, United States.,Center for Resuscitation Medicine, University of Minnesota School of Medicine, Minneapolis, MN, United States
| | - Demetris Yannopoulos
- Division of Cardiology, Department of Medicine, University of Minnesota, Minneapolis, MN, United States.,Center for Resuscitation Medicine, University of Minnesota School of Medicine, Minneapolis, MN, United States
| |
Collapse
|
40
|
Taylor T, Campbell CT, Kelly B. A Review of Bivalirudin for Pediatric and Adult Mechanical Circulatory Support. Am J Cardiovasc Drugs 2021; 21:395-409. [PMID: 33174088 PMCID: PMC7654565 DOI: 10.1007/s40256-020-00450-w] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Accepted: 10/30/2020] [Indexed: 11/25/2022]
Abstract
As the use of mechanical circulatory support has increased in volume and complexity, anticoagulation remains an intricate component of a patient’s pharmacotherapy plan. Traditionally, heparin has been the primary anticoagulant utilized because of its ease of titration and familiarity of use. More recently, bivalirudin, a direct thrombin inhibitor, has attracted attention as a potential alternative to traditional therapy. While labeled for use in percutaneous coronary interventions, it is utilized off-label for heparin-induced thrombocytopenia and mechanical circulatory support. A literature search identified ten studies in which bivalirudin was used in extracorporeal membrane oxygenation and five studies in which it was used in ventricular assist devices. The purpose of this review was to summarize the currently available literature for bivalirudin use for mechanical circulatory support in both adult and pediatric patients.
Collapse
Affiliation(s)
- Tori Taylor
- College of Pharmacy, University of Florida, Gainesville, FL, USA
| | - Christopher T Campbell
- Department of Pharmacy, Augusta University Medical Center, 1120 15th Street, Augusta, GA, 30912, USA.
| | - Brian Kelly
- Department of Pharmacy, University of Florida Health Shands Hospital, Gainesville, FL, USA
| |
Collapse
|
41
|
Welker C, Huang J, Ramakrishna H. Analysis of the 2020 EACTS/ELSO/STS/AATS Expert Guidelines on the Management of Adult Postcardiotomy Extracorporeal Life Support. J Cardiothorac Vasc Anesth 2021; 36:2207-2219. [PMID: 34332842 DOI: 10.1053/j.jvca.2021.06.022] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/16/2021] [Accepted: 06/17/2021] [Indexed: 02/07/2023]
Abstract
Extracorporeal life support (ECLS), also known as extracorporeal membrane oxygenation (ECMO), increasingly is used in postcardiotomy (PC) shock to facilitate a bridge to sustained recovery, long-term mechanical support, or heart transplantation. Given increasing prevalence and complexity of PC-ECLS, a joint expert consensus guideline was created in 2020 for management of adult PC-ECLS by the European Association for Cardio-Thoracic Surgery (EACTS), the Extracorporeal Life Support Organization (ELSO), the Society of Thoracic Surgeons (STS), and the American Association of Thoracic Surgery (AATS). The aim of this analysis was to comprehensively review the expert consensus guidelines, with particular emphasis on PC-ECLS candidacy, timing, cannula configuration, left ventricular distention, anticoagulation, ECLS weaning, and intensive care unit complications. This analysis finds the expert consensus guideline to be timely, pertinent, and clinically valuable, although there remains the need for larger clinical trials to codify best practices.
Collapse
Affiliation(s)
- Carson Welker
- Division of Critical Care Medicine, Department of Anesthesiology and Perioperative Medicine, Mayo Clinic, Rochester, MN
| | - Jeffrey Huang
- Department of Anesthesiology and Perioperative Medicine, Mayo Clinic, Rochester, MN
| | - Harish Ramakrishna
- Division of Cardiovascular and Thoracic Anesthesiology, Department of Anesthesiology and Perioperative Medicine, Mayo Clinic, Rochester, MN.
| |
Collapse
|
42
|
Behandlung der heparininduzierten Thrombozytopenie unter extrakorporaler Membranoxygenierung. ZEITSCHRIFT FUR HERZ THORAX UND GEFASSCHIRURGIE 2021. [DOI: 10.1007/s00398-021-00437-y] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
|
43
|
|
44
|
Comparison of Bivalirudin Versus Heparin for Maintenance Systemic Anticoagulation During Adult and Pediatric Extracorporeal Membrane Oxygenation. Crit Care Med 2021; 49:1481-1492. [PMID: 33870916 DOI: 10.1097/ccm.0000000000005033] [Citation(s) in RCA: 56] [Impact Index Per Article: 18.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
Abstract
OBJECTIVES To provide a comparative analysis of conventional heparin-versus bivalirudin-based systemic anticoagulation in adult and pediatric patients supported on extracorporeal membrane oxygenation. DESIGN Retrospective chart review study of adult and pediatric patients receiving extracorporeal membrane oxygenation from January 1, 2014, to October 1, 2019. SETTING A large, high-volume tertiary referral adult and pediatric extracorporeal membrane oxygenation center. PATIENTS Four hundred twenty-four individuals requiring extracorporeal membrane oxygenation support and systemically anticoagulated with either unfractionated heparin (223 adult and 65 pediatric patients) or bivalirudin (110 adult and 24 pediatric patients) were included. INTERVENTIONS None. MEASUREMENTS AND MAIN RESULTS Digital data abstraction was used to retrospectively collect patient details. The majority of both groups were cannulated centrally (67%), and the extracorporeal membrane oxygenation type was predominantly venoarterial (84%). The adult bivalirudin group had a greater occurrence of heparin-induced thrombocytopenia (12% vs 1%; p < 0.01) and was more likely to require postcardiotomy extracorporeal membrane oxygenation (36% vs 55%; p < 0.01). There were no statistical differences between the groups in regards to age, sex, and extracorporeal membrane oxygenation initiation location. The main finding was a reduced mortality in the adult bivalirudin group (odds ratio, 0.39; p < 0.01), whereas no difference was noted in the pediatric group. A significant reduction in the composite transfusion requirement in the first 24 hours was noted in the pediatric bivaluridin group with an odds ratio of 0.28 (p = 0.02). Groups did not differ in regard to laboratories per day, anticoagulant dose adjustments, or ischemic complications. CONCLUSIONS When compared with heparin-based systemic anticoagulation, bivalirudin demonstrated feasibility and safety as established by the absence of increases in identifiable adverse outcomes while manifesting substantial improvements in hospital mortality in adult patients. Further studies are necessary to corroborate these findings and further elucidate the role of bivalirudin during extracorporeal membrane oxygenation support.
Collapse
|
45
|
Buchtele N, Staudinger T, Schäfer AK, Bögl MS, Schoergenhofer C, Schwameis M. Anticoagulation in Critically Ill Adults during Extracorporeal Circulation. Hamostaseologie 2021; 41:294-306. [PMID: 33860514 DOI: 10.1055/a-1389-8216] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022] Open
Abstract
Extracorporeal circuits including renal replacement therapy, extracorporeal membrane oxygenation, and ventricular assist devices are increasingly used in critically ill patients. The need for anticoagulation to provide circuit patency and avoid thrombosis remains a challenging task for treating physicians. In the presence of overall low scientific evidence concerning the optimal anticoagulants, monitoring tests, and therapeutic target ranges, recommendations are largely expert opinions and most centers use individual "in-house" anticoagulation protocols. This review gives a practical view on current concepts of anticoagulation strategies in patients with extracorporeal assist devices.
Collapse
Affiliation(s)
- Nina Buchtele
- Department of Medicine I, Medical University of Vienna, Vienna, Austria
| | - Thomas Staudinger
- Department of Medicine I, Medical University of Vienna, Vienna, Austria
| | - Anne-Kristin Schäfer
- Division of Cardiac Surgery, Department of Surgery, Medical University of Vienna, Vienna, Austria
| | | | | | - Michael Schwameis
- Department of Emergency Medicine, Medical University of Vienna, Vienna, Austria
| |
Collapse
|
46
|
Selewski DT, Wille KM. Continuous renal replacement therapy in patients treated with extracorporeal membrane oxygenation. Semin Dial 2021; 34:537-549. [PMID: 33765346 PMCID: PMC8250911 DOI: 10.1111/sdi.12965] [Citation(s) in RCA: 16] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
Abstract
Extracorporeal membrane oxygenation (ECMO) is a life‐saving therapy utilized for patients with severe life‐threatening cardiorespiratory failure. Patients treated with ECMO are among the most severely ill encountered in critical care and are at high‐risk of developing multiple organ dysfunction, including acute kidney injury (AKI) and fluid overload. Continuous renal replacement therapy (CRRT) is increasingly utilized inpatients on ECMO to manage AKI and treat fluid overload. The indications for renal replacement therapy for patients on ECMO are similar to those of other critically ill populations; however, there is wide practice variation in how renal supportive therapies are utilized during ECMO. For patients requiring both CRRT and ECMO, CRRT may be connected directly to the ECMO circuit, or CRRT and ECMO may be performed independently. This review will summarize current knowledge of the epidemiology of AKI, indications and timing of CRRT, delivery of CRRT, and the outcomes of patients requiring CRRT with ECMO.
Collapse
Affiliation(s)
- David T Selewski
- Department of Pediatrics, Medical University of South Carolina, Charleston, SC, USA
| | - Keith M Wille
- Department of Medicine, University of Alabama at Birmingham, Birmingham, AL, USA
| |
Collapse
|
47
|
Patel PA, Henderson RA, Bolliger D, Erdoes G, Mazzeffi MA. The Year in Coagulation: Selected Highlights from 2020. J Cardiothorac Vasc Anesth 2021; 35:2260-2272. [PMID: 33781668 DOI: 10.1053/j.jvca.2021.02.057] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/25/2021] [Accepted: 02/26/2021] [Indexed: 01/28/2023]
Abstract
This is the second annual review in the Journal of Cardiothoracic and Vascular Anesthesia to cover highlights in coagulation for cardiac surgery. The goal of this article is to provide readers with a focused summary from the literature of the prior year's most important coagulation topics. In 2020, this included a discussion covering allogeneic transfusion, antiplatelet and anticoagulant therapy, factor concentrates, coagulation testing, mechanical circulatory support, and the effects of coronavirus disease 2019.
Collapse
Affiliation(s)
- Prakash A Patel
- Department of Anesthesiology, Cardiothoracic Division, Yale University School of Medicine, New Haven, CT.
| | - Reney A Henderson
- Department of Anesthesiology, Division of Cardiothoracic Anesthesia, University of Maryland School of Medicine, Baltimore, MD
| | - Daniel Bolliger
- Department of Anesthesiology, Prehospital Emergency Medicine and Pain Therapy, University Hospital Basel, Basel, Switzerland
| | - Gabor Erdoes
- Department of Anesthesiology and Pain Medicine, Inselspital, University Hospital of Bern, Bern, Switzerland
| | - Michael A Mazzeffi
- Department of Anesthesiology, Division of Cardiothoracic Anesthesia, University of Maryland School of Medicine, Baltimore, MD; Department of Anesthesiology, Division of Critical Care Medicine, University of Maryland School of Medicine, Baltimore, MD
| |
Collapse
|
48
|
LoSavio PS, Patel T, Urban MJ, Tajudeen B, Papagiannopoulos P, Revenaugh PC, Husain I, Batra PS. Management of Upper Airway Bleeding in COVID-19 Patients on Extracorporeal Membrane Oxygenation. Laryngoscope 2020; 130:2558-2560. [PMID: 32470179 PMCID: PMC7283688 DOI: 10.1002/lary.28846] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/21/2020] [Revised: 05/16/2020] [Accepted: 05/25/2020] [Indexed: 11/23/2022]
Affiliation(s)
- Phillip S LoSavio
- Department of Otorhinolaryngology-Head and Neck Surgery, Rush University Medical Center, Chicago, Illinois, U.S.A
| | - Tirth Patel
- Department of Otorhinolaryngology-Head and Neck Surgery, Rush University Medical Center, Chicago, Illinois, U.S.A
| | - Matthew J Urban
- Department of Otorhinolaryngology-Head and Neck Surgery, Rush University Medical Center, Chicago, Illinois, U.S.A
| | - Bobby Tajudeen
- Department of Otorhinolaryngology-Head and Neck Surgery, Rush University Medical Center, Chicago, Illinois, U.S.A
| | - Peter Papagiannopoulos
- Department of Otorhinolaryngology-Head and Neck Surgery, Rush University Medical Center, Chicago, Illinois, U.S.A
| | - Peter C Revenaugh
- Department of Otorhinolaryngology-Head and Neck Surgery, Rush University Medical Center, Chicago, Illinois, U.S.A
| | - Inna Husain
- Department of Otorhinolaryngology-Head and Neck Surgery, Rush University Medical Center, Chicago, Illinois, U.S.A
| | - Pete S Batra
- Department of Otorhinolaryngology-Head and Neck Surgery, Rush University Medical Center, Chicago, Illinois, U.S.A
| |
Collapse
|
49
|
Gunn TM, Gurley JC, Keshavamurthy S. Cannula migration through an undiagnosed patent foramen ovale and embolic cerebrovascular accident in a patient with femoral venoarterial extracorporeal membrane oxygenation. J Card Surg 2020; 35:1681-1682. [PMID: 32383280 DOI: 10.1111/jocs.14618] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
We present a case report of a patient with a pulmonary embolus placed on venoarterial extracorporeal membrane oxygenation who developed venous cannula migration through an undiagnosed patent foramen ovale causing an ischemic stroke due to a thrombus and requiring thrombectomy and device closure of the atrial defect.
Collapse
Affiliation(s)
- Tyler M Gunn
- Division of Cardiothoracic Surgery, Department of Surgery, University of Kentucky, Lexington, Kentucky
| | - John C Gurley
- Division of Cardiovascular Medicine, Department of Internal Medicine, University of Kentucky, Lexington, Kentucky
| | - Suresh Keshavamurthy
- Division of Cardiothoracic Surgery, Department of Surgery, University of Kentucky, Lexington, Kentucky
| |
Collapse
|