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Siemieniak S, Greiving T, Shepard N, Rall J, Nowadly C. Endovascular aortic occlusion improves return of spontaneous circulation after longer periods of cardiopulmonary resuscitation: A translational study in pigs. Resusc Plus 2024; 18:100603. [PMID: 38510375 PMCID: PMC10950796 DOI: 10.1016/j.resplu.2024.100603] [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: 12/14/2023] [Revised: 02/26/2024] [Accepted: 03/03/2024] [Indexed: 03/22/2024] Open
Abstract
Introduction Resuscitative endovascular balloon occlusion of the aorta (REBOA) has emerged as an adjunct to CPR for nontraumatic cardiac arrest (NTCA). This translational study investigated the impact of varying low-flow duration (15- vs 30-mins) on REBOA's hemodynamic performance and ability to achieve return of spontaneous circulation (ROSC) in a porcine model. Methods Thirty-two pigs were anesthetized and placed into ventricular fibrillation. All animals received a 4-min no-flow period before CPR was initiated. Animals were randomized into four groups: 15- vs 30-minutes of CPR; REBOA vs. no-REBOA. After completion of 15- or 30-minute low-flow, ACLS was initiated and REBOA was inflated in experimental animals. Results In the 15-mins groups, there were no differences in the rates of ROSC between REBOA (4/8, 50%) and control (4/8, 50%; p = 0.99). However, in the 30-min groups, the REBOA animals had a significantly higher rate of ROSC (6/8, 75%) compared to control (1/8, 12.5%; p = 0.04). In the 7-mins after REBOA deployment in the 30-min animals there was a statistically significant difference in coronary perfusion pressure (REBOA 42.1 mmHg, control 3.6 mmHg, p = 0.038). Importantly, 5/6 animals that obtained ROSC in the 30-min group with REBOA re-arrested at least once, with 3/6 maintaining ROSC until study completion. Conclusion In our porcine model of NTCA, REBOA preferentially improved hemodynamics and ROSC after a 30-mins period of low-flow CPR. REBOA may be a viable strategy to improve ROSC after prolonged downtime, however, more hemodynamic support will be required to maintain ROSC.
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Affiliation(s)
- Steven Siemieniak
- Department of Emergency Medicine, Brooke Army Medical Center, Fort Sam Houston, TX, USA
| | - Tanner Greiving
- Department of Emergency Medicine, Brooke Army Medical Center, Fort Sam Houston, TX, USA
| | - Nola Shepard
- 59th Medical Wing / Science and Technology, Lackland Air Force Base, TX, USA
| | - Jason Rall
- 59th Medical Wing / Science and Technology, Lackland Air Force Base, TX, USA
| | - Craig Nowadly
- Department of Emergency Medicine, Brooke Army Medical Center, Fort Sam Houston, TX, USA
- 59th Medical Wing / Science and Technology, Lackland Air Force Base, TX, USA
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Rall JM, Baker KJ, Sandoval ML, Flinn AN, Causey MW. Transition of Resuscitative Endovascular Balloon Occlusion of the Aorta from Zone 3 to Zone 1 to Treat Hemodynamic Collapse during Continued Hemorrhage. Mil Med 2024; 189:e285-e290. [PMID: 37552642 DOI: 10.1093/milmed/usad313] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/12/2023] [Revised: 07/20/2023] [Accepted: 07/26/2023] [Indexed: 08/10/2023] Open
Abstract
INTRODUCTION Noncompressible torso hemorrhage (NCTH) accounts for most potentially survivable deaths on the battlefield. Treatment of NCTH is challenging, especially in far-forward environments with limited capabilities. Resuscitative endovascular balloon occlusion of the aorta (REBOA) has shown promise in the care of patients with NCTH. REBOA involves introducing a balloon catheter into the descending aorta in a specific occlusion region (zones 1, 2, or 3) and acts as a hemorrhage control adjunct with resuscitative support. The balloon is placed in zone 3 in the infrarenal aorta for high junctional or pelvic injuries and in zone 1 proximal to the diaphragm for torso hemorrhage. Zone 1 REBOA provides more resuscitative support than zone 3; however, the potential for ischemia and reperfusion injuries is greater with zone 1 than with zone 3 REBOA placement. This study aims to determine the possible benefit of transitioning the REBOA balloon from zone 3 to zone 1 to rescue a patient with ongoing venous bleeding and impending cardiovascular collapse. MATERIALS AND METHODS Yorkshire male swine (70-90 kg, n = 6 per group) underwent injury to the femoral artery, which was allowed to bleed freely for 60 s, along with a simultaneous controlled venous hemorrhage. After 60 s, the arterial bleed was controlled with hemostatic gauze and zone 3 REBOA was inflated. Five hundred milliliters of Hextend was used for initial fluid resuscitation. The controlled venous bleed continued until a mean arterial pressure (MAP) of 30 mmHg was reached to create an impending cardiovascular collapse. The animals were then randomized into either continued zone 3 REBOA or transition from zone 3 to zone 1 REBOA. Following 30 min, a "hospital phase" was initiated, consisting of cessation of the venous hemorrhage, deflation of the REBOA balloon, and transfusion of one unit of whole blood administered along with saline and norepinephrine to maintain a MAP of 60 mmHg or higher. The animals then underwent a 2-h observation period. Survival, hemodynamics, and blood chemistries were compared between groups. RESULTS No significant differences between groups were observed in hemodynamic or laboratory values at baseline, postinitial injury, or when MAP reached 30 mmHg. Survival was significantly longer in animals that transitioned into zone 1 REBOA (log-rank analysis, P = .012). The average time of survival was 14 ± 10 min for zone 3 animals vs. 65 ± 59 min for zone 1 animals (P = .064). No animals in the zone 3 group survived to the hospital phase. Zone 1-treated animals showed immediate hemodynamic improvement after transition, with maximum blood pressure reaching near baseline values compared to those in the zone 3 group. CONCLUSIONS In this swine model of NCTH, hemodynamics and survival were improved when the REBOA balloon was transitioned from zone 3 to zone 1 during an impending cardiovascular collapse. Furthermore, these improved outcome data support the pursuit of additional research into mitigating ischemia-reperfusion insult to the abdominal viscera while still providing excellent resuscitative support, such as intermittent or partial REBOA.
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Affiliation(s)
- Jason M Rall
- Office of Science and Technology, 59th Medical Wing, JBSA Lackland, TX 78236, USA
| | - Kimberly J Baker
- Office of Science and Technology, 59th Medical Wing, JBSA Lackland, TX 78236, USA
| | - Melody L Sandoval
- Office of Science and Technology, 59th Medical Wing, JBSA Lackland, TX 78236, USA
| | - Ashley N Flinn
- Division of Vascular Surgery, San Antonio Military Medical Center, Fort Sam Houston, TX 78234, USA
| | - Marlin W Causey
- Division of Vascular Surgery, San Antonio Military Medical Center, Fort Sam Houston, TX 78234, USA
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Dogan EM, Axelsson B, Jauring O, Hörer TM, Nilsson KF, Edström M. Intra-aortic and Intra-caval Balloon Pump Devices in Experimental Non-traumatic Cardiac Arrest and Cardiopulmonary Resuscitation. J Cardiovasc Transl Res 2023; 16:948-955. [PMID: 36481982 PMCID: PMC10480270 DOI: 10.1007/s12265-022-10343-9] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/23/2022] [Accepted: 11/25/2022] [Indexed: 12/13/2022]
Abstract
Intra-aortic balloon pump (IABP) use during CPR has been scarcely studied. Intra-caval balloon pump (ICBP) may decrease backward venous flow during CPR. Mechanical chest compressions (MCC) were initiated after 10 min of cardiac arrest in anesthetized pigs. After 5 min of MCC, IABP (n = 6) or ICBP (n = 6) was initiated. The MCC device and the IABP/ICBP had slightly different frequencies, inducing a progressive peak pressure phase shift. IABP inflation 0.15 s before MCC significantly increased mean arterial pressure (MAP) and carotid blood flow (CBF) compared to inflation 0.10 s after MCC and to MCC only. Coronary perfusion pressure significantly increased with IABP inflation 0.25 s before MCC compared to inflation at MCC. ICBP inflation before MCC significantly increased MAP and CBF compared to inflation after MCC but not compared to MCC only. This shows the potential of IABP in CPR when optimally synchronized with MCC. The effect of timing of intra-aortic balloon pump (IABP) inflation during mechanical chest compressions (MCC) on hemodynamics. Data from12 anesthetized pigs.
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Affiliation(s)
- Emanuel M Dogan
- Department of Anesthesiology and Intensive Care, Faculty of Medicine and Health, Örebro University, SE-701 85, Örebro, Sweden.
| | - Birger Axelsson
- Department of Cardiothoracic and Vascular Surgery, Faculty of Medicine and Health, Örebro University, Örebro, Sweden
| | - Oskar Jauring
- Department of Anesthesiology and Intensive Care, Faculty of Medicine and Health, Örebro University, SE-701 85, Örebro, Sweden
| | - Tal M Hörer
- Department of Cardiothoracic and Vascular Surgery, Faculty of Medicine and Health, Örebro University, Örebro, Sweden
| | - Kristofer F Nilsson
- Department of Cardiothoracic and Vascular Surgery, Faculty of Medicine and Health, Örebro University, Örebro, Sweden
| | - Måns Edström
- Department of Anesthesiology and Intensive Care, Faculty of Medicine and Health, Örebro University, SE-701 85, Örebro, Sweden
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Stene Hurtsén A, McGreevy DT, Karlsson C, Frostell CG, Hörer TM, Nilsson KF. A randomized porcine study of hemorrhagic shock comparing end-tidal carbon dioxide targeted and proximal systolic blood pressure targeted partial resuscitative endovascular balloon occlusion of the aorta in the mitigation of metabolic injury. Intensive Care Med Exp 2023; 11:18. [PMID: 37032421 PMCID: PMC10083152 DOI: 10.1186/s40635-023-00502-w] [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: 12/20/2022] [Accepted: 02/16/2023] [Indexed: 04/11/2023] Open
Abstract
BACKGROUND The definition of partial resuscitative endovascular balloon occlusion of the aorta (pREBOA) is not yet determined and clinical markers of the degree of occlusion, metabolic effects and end-organ injury that are clinically monitored in real time are lacking. The aim of the study was to test the hypothesis that end-tidal carbon dioxide (ETCO2) targeted pREBOA causes less metabolic disturbance compared to proximal systolic blood pressure (SBP) targeted pREBOA in a porcine model of hemorrhagic shock. MATERIALS AND METHODS Twenty anesthetized pigs (26-35 kg) were randomized to 45 min of either ETCO2 targeted pREBOA (pREBOAETCO2, ETCO2 90-110% of values before start of occlusion, n = 10) or proximal SBP targeted pREBOA (pREBOASBP, SBP 80-100 mmHg, n = 10), during controlled grade IV hemorrhagic shock. Autotransfusion and reperfusion over 3 h followed. Hemodynamic and respiratory parameters, blood samples and jejunal specimens were analyzed. RESULTS ETCO2 was significantly higher in the pREBOAETCO2 group during the occlusion compared to the pREBOASBP group, whereas SBP, femoral arterial mean pressure and abdominal aortic blood flow were similar. During reperfusion, arterial and mesenteric lactate, plasma creatinine and plasma troponin concentrations were higher in the pREBOASBP group. CONCLUSIONS In a porcine model of hemorrhagic shock, ETCO2 targeted pREBOA caused less metabolic disturbance and end-organ damage compared to proximal SBP targeted pREBOA, with no disadvantageous hemodynamic impact. End-tidal CO2 should be investigated in clinical studies as a complementary clinical tool for mitigating ischemic-reperfusion injury when using pREBOA.
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Affiliation(s)
- Anna Stene Hurtsén
- Department of Cardiothoracic and Vascular Surgery, Faculty of Medicine and Health, Örebro University, Örebro, Sweden.
- Centre for Clinical Research and Education, County Council of Värmland, Karlstad, Sweden.
- School of Medical Sciences, Örebro University, Örebro, Sweden.
| | - David T McGreevy
- Department of Cardiothoracic and Vascular Surgery, Faculty of Medicine and Health, Örebro University, Örebro, Sweden
- School of Medical Sciences, Örebro University, Örebro, Sweden
| | | | - Claes G Frostell
- Anesthesiology and Intensive Care, Department of Clinical Sciences, Karolinska Institute at Danderyd Hospital, Stockholm, Sweden
| | - Tal M Hörer
- Department of Cardiothoracic and Vascular Surgery, Faculty of Medicine and Health, Örebro University, Örebro, Sweden
- Department of Surgery, Faculty of Medicine and Health, Örebro University, Örebro, Sweden
| | - Kristofer F Nilsson
- Department of Cardiothoracic and Vascular Surgery, Faculty of Medicine and Health, Örebro University, Örebro, Sweden
- School of Medical Sciences, Örebro University, Örebro, Sweden
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Extremity tourniquets raise blood pressure and maintain heart rate. Am J Emerg Med 2023; 65:12-15. [PMID: 36577207 DOI: 10.1016/j.ajem.2022.12.032] [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: 08/08/2022] [Revised: 12/04/2022] [Accepted: 12/18/2022] [Indexed: 12/24/2022] Open
Abstract
BACKGROUND Tourniquets have been modified and used for centuries to occlude blood flow to control hemorrhage. More recently, the occlusion of peripheral vessels has been linked to resultant increases in blood pressure, which may provide additional therapeutic potential, particularly during states of low cardiac output. OBJECTIVE The objective of this study was to investigate a causal relationship between tourniquet application and blood pressure in healthy adults. METHODS Healthy adult volunteers were recruited to participate in this IRB-approved study. Each participant met inclusion criteria and demonstrated baseline normotension. Brachial cuff blood pressure and heart rate were recorded pre- and post-tourniquet application to the bilateral legs. RESULTS Twenty-seven adults aged 22 to 35 years participated and were included in analysis. The average systolic blood pressure was 122 ± 7 mmHg, diastolic blood pressure was 72 ± 9 mmHg, and heart rate was 70 ± 13 bpm. Following bilateral tourniquet application over the femoral vasculature, we observed a statistically significant increase in systolic (7 mmHg, p < 0.001) and diastolic (4 mmHg, p = 0.05) blood pressures with no significant change in heart rate (2 bpm, p > 0.05). CONCLUSIONS The elevations in systolic and diastolic blood pressures establish a dependent relationship between tourniquet application to the lower extremities and blood pressure elevation. These results may support new indications for tourniquet-use or extremity vessel occlusion in settings of hemodynamic instability.
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Seigler SW, Quinn KM, Holman HL, Kim JY, Rajab TK. A single-center, nonblinded, clinical trial comparing blood pressures before and after tourniquet application in healthy humans: A study protocol. PLoS One 2023; 18:e0280139. [PMID: 36608001 PMCID: PMC9821481 DOI: 10.1371/journal.pone.0280139] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/16/2022] [Accepted: 12/15/2022] [Indexed: 01/07/2023] Open
Abstract
INTRODUCTION Cardiac arrest is the leading cause of natural death in the United States, and most surviving patients suffer from neurological dysfunction. Although this is recognized as a problem, there have been very few changes to the cardiopulmonary resuscitation (CPR) procedure. Tourniquets have been recognized for their ability to increase truncal blood pressure and have been shown to improve CPR outcomes in animal models. However, the relationship between tourniquet application and blood pressure elevation has not been adequately explored in healthy human adults. OBJECTIVES The objective of this study is to demonstrate that bilateral, non-invasive, peripheral vascular occlusion in the thighs results in an increased proximal systolic blood pressure ≥ 10 mmHg. METHODS This is a single-center, non-blinded clinical trial. Volunteers will be screened for eligibility at least 24 hours before the day of the trial. On the day of the trial, volunteers will undergo an informed consent process. If they choose to participate in the trial after informed consent, their baseline blood pressure will be measured. Volunteers will then have a Combat Application Tourniquet (CAT) applied to each thigh, and the windlasses will be tightened by IRB-approved personnel. Once no pulse can be felt in the lower extremity, blood pressure will be measured in the arm. This will be replicated three times, and the tourniquets will be loosened between trials to allow the volunteers to rest. Any complications that arise during the trial will be handled by the physician that is present. ANALYSIS Changes in systolic blood pressure and diastolic blood pressure will be analyzed using a Shapiro-Wilk test. Then, a one-way repeated measures analysis of variance (ANOVA) will be performed with a Holm-Sidak post-hoc test to determine the mean differences. The significance level will be set to 5% for statistical significance. REGISTRY AND REGISTRATION NUMBER Clinicaltrials.gov, NCT05324306.
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Affiliation(s)
- Samuel W. Seigler
- College of Medicine, Medical University of South Carolina, Charleston, South Carolina, United States of America
- * E-mail:
| | - Kristen M. Quinn
- Department of Surgery, Medical University of South Carolina, Charleston, South Carolina, United States of America
| | - Heather L. Holman
- College of Medicine, Medical University of South Carolina, Charleston, South Carolina, United States of America
- Department of Surgery, Medical University of South Carolina, Charleston, South Carolina, United States of America
| | - Joshua Y. Kim
- Department of Surgery, Medical University of South Carolina, Charleston, South Carolina, United States of America
- Human-Centered Design, Medical University of South Carolina, Charleston, South Carolina, United States of America
| | - Taufiek K. Rajab
- Department of Surgery, Medical University of South Carolina, Charleston, South Carolina, United States of America
- Department of Pediatric Cardiothoracic Surgery, Medical University of South Carolina, Charleston, South Carolina, United States of America
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Hsu ST, Fu YK, Lin HY, Chiang WC, Chiu YC, Sun JT, Ma MHM. Resuscitative Endovascular Balloon Occlusion of the Aorta for Traumatic Cardiopulmonary Arrest in the Emergency Department: The First Case With Successful Return of Spontaneous Circulation in Taiwan. J Acute Med 2022; 12:126-130. [PMID: 36313606 PMCID: PMC9561488 DOI: 10.6705/j.jacme.202209_12(3).0006] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/21/2021] [Revised: 09/03/2021] [Accepted: 10/20/2021] [Indexed: 06/16/2023]
Abstract
Exsanguinating torso hemorrhage is a leading cause of death in trauma patients. Bleeding leads to hypothermia, acidosis, and coagulopathy, the so-called "lethal triad," and creates a vicious cycle. Therefore, bleeding control tops the priority list in the management of trauma patients. Placement of resuscitative endovascular balloon occlusion of the aorta (REBOA) in patients with traumatic non-compressible torso hemorrhage is a developing technique in the emergency departments (EDs) in Taiwan, and it is a possible solution for abdominal and pelvic trauma patients with hemodynamic instability. It not only temporarily controls bleeding below the inflation site but also increases cerebral and coronary circulation. It can create a bridge for definitive care such as an operation or an embolization, possibly preventing death. Compared to thoracotomy followed by an aortic cross clamp, REBOA is a less invasive and possibly, a more efficient way to control the hemorrhage and may lead to better overall survival. The use of REBOA has been proven to be associated with improved survival-to-discharge in severely injured trauma patients. We report a case of out-of-hospital cardiac arrest caused by penetrating injury wherein return of spontaneous circulation was successfully achieved after 39-minute cardiopulmonary resuscitation and REBOA placement in the ED. The REBOA balloon was deflated after bleeding was stopped during the laparotomy operation. The patient was then transferred to the intensive care unit for postoperative care. Unfortunately, the patient passed away approximately 12 hours after the surgery.
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Affiliation(s)
- Shuo-Ting Hsu
- Far Eastern Memorial Hospital Department of Emergency Medicine New Taipei City Taiwan
| | - Yi-Kai Fu
- Far Eastern Memorial Hospital Department of Emergency Medicine New Taipei City Taiwan
| | - Hao-Yang Lin
- National Taiwan University Hospital Yun-Lin Branch Department of Emergency Medicine Yunlin Taiwan
| | - Wen-Chu Chiang
- National Taiwan University Hospital Yun-Lin Branch Department of Emergency Medicine Yunlin Taiwan
| | - Yu-Chen Chiu
- Far Eastern Memorial Hospital Department of Emergency Medicine New Taipei City Taiwan
| | - Jen-Tang Sun
- Far Eastern Memorial Hospital Department of Emergency Medicine New Taipei City Taiwan
- Tzu Chi University Department of Emergency Medicine Hualien Taiwan
| | - Matthew Huei-Ming Ma
- National Taiwan University Hospital Yun-Lin Branch Department of Emergency Medicine Yunlin Taiwan
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Hutin A, Levy Y, Lidouren F, Kohlhauer M, Carli P, Ghaleh B, Lamhaut L, Tissier R. Resuscitative endovascular balloon occlusion of the aorta vs epinephrine in the treatment of non-traumatic cardiac arrest in swine. Ann Intensive Care 2021; 11:81. [PMID: 34002305 PMCID: PMC8128970 DOI: 10.1186/s13613-021-00871-z] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/04/2021] [Accepted: 05/08/2021] [Indexed: 12/31/2022] Open
Abstract
Background The administration of epinephrine in the management of non-traumatic cardiac arrest remains recommended despite controversial effects on neurologic outcome. The use of resuscitative endovascular balloon occlusion of the aorta (REBOA) could be an interesting alternative. The aim of this study was to compare the effects of these 2 strategies on return of spontaneous circulation (ROSC) and cerebral hemodynamics during cardiopulmonary resuscitation (CPR) in a swine model of non-traumatic cardiac arrest. Results Anesthetized pigs were instrumented and submitted to ventricular fibrillation. After 4 min of no-flow and 18 min of basic life support (BLS) using a mechanical CPR device, animals were randomly submitted to either REBOA or epinephrine administration before defibrillation attempts. Six animals were included in each experimental group (Epinephrine or REBOA). Hemodynamic parameters were similar in both groups during BLS, i.e., before randomization. After epinephrine administration or REBOA, mean arterial pressure, coronary and cerebral perfusion pressures similarly increased in both groups. However, carotid blood flow (CBF) and cerebral regional oxygenation saturation were significantly higher with REBOA as compared to epinephrine administration (+ 125% and + 40%, respectively). ROSC was obtained in 5 animals in both groups. After resuscitation, CBF remained lower in the epinephrine group as compared to REBOA, but it did not achieve statistical significance. Conclusions During CPR, REBOA is as efficient as epinephrine to facilitate ROSC. Unlike epinephrine, REBOA transitorily increases cerebral blood flow and could avoid its cerebral detrimental effects during CPR. These experimental findings suggest that the use of REBOA could be beneficial in the treatment of non-traumatic cardiac arrest.
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Affiliation(s)
- Alice Hutin
- Univ Paris Est Créteil, INSERM, IMRB, 94010, Créteil, France.,Ecole Nationale Vétérinaire D'Alfort, IMRB, AfterROSC Network, 7 avenue du Général de Gaulle, 94700, Maisons-Alfort, France.,SAMU de Paris-ICU, Necker University Hospital, Assistance Publique-Hôpitaux de Paris, Université de Paris, 75015, Paris, France
| | - Yaël Levy
- Univ Paris Est Créteil, INSERM, IMRB, 94010, Créteil, France.,Ecole Nationale Vétérinaire D'Alfort, IMRB, AfterROSC Network, 7 avenue du Général de Gaulle, 94700, Maisons-Alfort, France
| | - Fanny Lidouren
- Univ Paris Est Créteil, INSERM, IMRB, 94010, Créteil, France.,Ecole Nationale Vétérinaire D'Alfort, IMRB, AfterROSC Network, 7 avenue du Général de Gaulle, 94700, Maisons-Alfort, France
| | - Matthias Kohlhauer
- Univ Paris Est Créteil, INSERM, IMRB, 94010, Créteil, France.,Ecole Nationale Vétérinaire D'Alfort, IMRB, AfterROSC Network, 7 avenue du Général de Gaulle, 94700, Maisons-Alfort, France
| | - Pierre Carli
- SAMU de Paris-ICU, Necker University Hospital, Assistance Publique-Hôpitaux de Paris, Université de Paris, 75015, Paris, France
| | - Bijan Ghaleh
- Univ Paris Est Créteil, INSERM, IMRB, 94010, Créteil, France.,Ecole Nationale Vétérinaire D'Alfort, IMRB, AfterROSC Network, 7 avenue du Général de Gaulle, 94700, Maisons-Alfort, France
| | - Lionel Lamhaut
- SAMU de Paris-ICU, Necker University Hospital, Assistance Publique-Hôpitaux de Paris, Université de Paris, 75015, Paris, France.,INSERM U970, PARCC, CEMS, Paris, France
| | - Renaud Tissier
- Univ Paris Est Créteil, INSERM, IMRB, 94010, Créteil, France. .,Ecole Nationale Vétérinaire D'Alfort, IMRB, AfterROSC Network, 7 avenue du Général de Gaulle, 94700, Maisons-Alfort, France.
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Hibert-Carius P, McGreevy DT, Abu-Zidan FM, Hörer TM. Revised Injury Severity Classification II (RISC II) is a predictor of mortality in REBOA-managed severe trauma patients. PLoS One 2021; 16:e0246127. [PMID: 33566834 PMCID: PMC7875379 DOI: 10.1371/journal.pone.0246127] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/23/2020] [Accepted: 01/14/2021] [Indexed: 11/19/2022] Open
Abstract
The evidence supporting the use of Resuscitative Endovascular Balloon Occlusion of the Aorta (REBOA) in severely injured patients is still debatable. Using the ABOTrauma Registry, we aimed to define factors affecting mortality in trauma REBOA patients. Data from the ABOTrauma Registry collected between 2014 and 2020 from 22 centers in 13 countries globally were analysed. Of 189 patients, 93 died (49%) and 96 survived (51%). The demographic, clinical, REBOA criteria, and laboratory variables of these two groups were compared using non-parametric methods. Significant factors were then entered into a backward logistic regression model. The univariate analysis showed numerous significant factors that predicted death including mechanism of injury, ongoing cardiopulmonary resuscitation, GCS, dilated pupils, systolic blood pressure, SPO2, ISS, serum lactate level and Revised Injury Severity Classification (RISCII). RISCII was the only significant factor in the backward logistic regression model (p < 0.0001). The odds of survival increased by 4% for each increase of 1% in the RISCII. The best RISCII that predicted 30-day survival in the REBOA treated patients was 53.7%, having a sensitivity of 82.3%, specificity of 64.5%, positive predictive value of 70.5%, negative predictive value of 77.9%, and usefulness index of 0.385. Although there are multiple significant factors shown in the univariate analysis, the only factor that predicted 30-day mortality in REBOA trauma patients in a logistic regression model was RISCII. Our results clearly demonstrate that single variables may not do well in predicting mortality in severe trauma patients and that a complex score such as the RISC II is needed. Although a complex score may be useful for benchmarking, its clinical utility can be hindered by its complexity.
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Affiliation(s)
- Peter Hibert-Carius
- Department of Anesthesiology, Emergency and Intensive Care Medicine, Bergmannstrost Hospital Halle, Halle, Germany
| | - David T. McGreevy
- Department of Cardiothoracic and Vascular Surgery, Faculty of Medicine and Health, Örebro University, Örebro, Sweden
| | - Fikri M. Abu-Zidan
- Department of Surgery, College of Medicine and Health Science, UAE University, Al-Ain, United Arab Emirates
- * E-mail:
| | - Tal M. Hörer
- Department of Cardiothoracic and Vascular Surgery, Faculty of Medicine and Health, Örebro University, Örebro, Sweden
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10
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McGreevy DT, Sadeghi M, Nilsson KF, Hörer TM. Low profile REBOA device for increasing systolic blood pressure in hemodynamic instability: single-center 4-year experience of use of ER-REBOA. Eur J Trauma Emerg Surg 2021; 48:307-313. [PMID: 33515268 PMCID: PMC8825639 DOI: 10.1007/s00068-020-01586-9] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/07/2020] [Accepted: 12/27/2020] [Indexed: 11/29/2022]
Abstract
Background Hemodynamic instability due to torso hemorrhage can be managed with the assistance of resuscitative endovascular balloon occlusion of the aorta (REBOA). This is a report of a single-center experience using the ER-REBOA™ catheter for traumatic and non-traumatic cases as an adjunct to hemorrhage control and as part of the EndoVascular resuscitation and Trauma Management (EVTM) concept. The objective of this report is to describe the clinical usage, technical success, results, complications and outcomes of the ER-REBOA™ catheter at Örebro University hospital, a middle-sized university hospital in Europe. Methods Data concerning patients receiving the ER-REBOA™ catheter for any type of hemorrhagic shock and hemodynamic instability at Örebro University hospital in Sweden were collected prospectively from October 2015 to May 2020. Results A total of 24 patients received the ER-REBOA™ catheter (with the intention to use) for traumatic and non-traumatic hemodynamic control; it was used in 22 patients. REBOA was performed or supervised by vascular surgeons using 7–8 Fr sheaths with an anatomic landmark or ultrasound guidance. Systolic blood pressure (SBP) increased significantly from 50 mmHg (0–63) to 95 mmHg (70–121) post REBOA. In this cohort, distal embolization and balloon rupture due to atherosclerosis were reported in one patient and two patients developed renal failure. There were no cases of balloon migration. Overall 30-day survival was 59%, with 45% for trauma patients and 73% for non-traumatic patients. Responders to REBOA had a significantly lower rate of mortality at both 24 h and 30 days. Conclusions Our clinical data and experience show that the ER-REBOA™ catheter can be used for control of hemodynamic instability and to significantly increase SBP in both traumatic and non-traumatic cases, with relatively few complications. Responders to REBOA have a significantly lower rate of mortality.
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Affiliation(s)
- David T McGreevy
- Department of Cardiothoracic and Vascular Surgery, Faculty of Medicine and Health, Örebro University, Örebro University Hospital, 701 85, Örebro, Sweden.
| | - Mitra Sadeghi
- Department of Cardiothoracic and Vascular Surgery, Faculty of Medicine and Health, Örebro University, Örebro University Hospital, 701 85, Örebro, Sweden
| | - Kristofer F Nilsson
- Department of Cardiothoracic and Vascular Surgery, Faculty of Medicine and Health, Örebro University, Örebro University Hospital, 701 85, Örebro, Sweden
| | - Tal M Hörer
- Department of Cardiothoracic and Vascular Surgery, Faculty of Medicine and Health, Örebro University, Örebro University Hospital, 701 85, Örebro, Sweden.,Department of Surgery, Faculty of Medicine and Health, Örebro University, Örebro, Sweden
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11
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Hilbert-Carius P, McGreevy D, Abu-Zidan FM, Hörer TM. Successfully REBOA performance: does medical specialty matter? International data from the ABOTrauma Registry. World J Emerg Surg 2020; 15:62. [PMID: 33228705 PMCID: PMC7685615 DOI: 10.1186/s13017-020-00342-z] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/11/2020] [Accepted: 11/05/2020] [Indexed: 11/10/2022] Open
Abstract
BACKGROUND Resuscitative endovascular balloon occlusion of the aorta (REBOA) is a minimally invasive procedure being increasingly utilized to prevent patients with non-compressible torso hemorrhage from exsanguination. The increased use of REBOA is giving rise to discussion about "Who is and who should be performing it?" METHODS Data from the international ABO (aortic balloon occlusion) Trauma Registry from between November 2014 and April 2020 were analyzed concerning the question: By who, how, and where is REBOA being performed? The registry collects retrospective and prospective data concerning use of REBOA in trauma patients. RESULTS During the study period, 259 patients had been recorded in the registry, 72.5% (n = 188) were males with a median (range) age of 46 (10-96) years. REBOA was performed in the ER in 50.5%, in the OR in 41.5%, and in the angiography suite in 8% of patients. In 54% of the patients REBOA was performed by surgeons (trauma surgeons 28%, vascular surgeons 22%, general surgeons 4%) and in 46% of the patients by non-surgeons (emergency physicians 31%, radiologists 9.5%, anesthetists 5.5%). Common femoral artery (CFA) access was achieved by use of external anatomic landmarks and palpation alone in 119 patients (51%), by cutdown in 57 patients (24%), using ultrasound in 49 patients (21%), and by fluoroscopy in 9 patients (4%). Significant differences between surgeons and non-surgeons were found regarding patient's age, injury severity, access methods, place where REBOA was performed, location patients were taken to from the emergency room, and mortality. CONCLUSION A substantial number of both surgical and non-surgical medical disciplines are successfully performing REBOA to an almost equal extent. Surgical cutdown is used less frequently as access to the CFA compared with reports in older literature and puncture by use of external anatomic landmarks and palpation alone is used with a high rate of success. Instead of discussing "Who should be performing REBOA?" future research should focus on "Which patient benefits most from REBOA?"
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Affiliation(s)
- Peter Hilbert-Carius
- Department of Anesthesiology, Intensive Care and Emergency Medicine, Bergmannstrost Hospital Halle, Mersbuegerstraße 165, 06112, Halle (Saale), Germany.
| | - David McGreevy
- Department of Cardiothoracic and Vascular Surgery, Faculty of Medicine and Health, Örebro University, Örebro, Sweden
| | - Fikri M Abu-Zidan
- Department of Surgery, College of Medicine and Health Science, UAE University, Al-Ain, United Arab Emirates
| | - Tal M Hörer
- Department of Cardiothoracic and Vascular Surgery, Faculty of Medicine and Health, Örebro University, Örebro, Sweden.,Department of General Surgery, Faculty of Medicine and Health, Örebro University, Örebro, Sweden
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12
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Nowadly CD, Johnson MA, Hoareau GL, Manning JE, Daley JI. The use of resuscitative endovascular balloon occlusion of the aorta (REBOA) for non-traumatic cardiac arrest: A review. J Am Coll Emerg Physicians Open 2020; 1:737-743. [PMID: 33145513 PMCID: PMC7593442 DOI: 10.1002/emp2.12241] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/25/2020] [Revised: 08/11/2020] [Accepted: 08/14/2020] [Indexed: 12/21/2022] Open
Abstract
Resuscitative endovascular balloon occlusion of the aorta (REBOA) has been proposed as a novel approach to managing non-traumatic cardiac arrest (NTCA). During cardiac arrest, cardiac output ceases and perfusion of vital organs is compromised. Traditional advanced cardiac life support (ACLS) measures and cardiopulmonary resuscitation are often unable to achieve return of spontaneous circulation (ROSC). During insertion of REBOA a balloon-tipped catheter is placed into the femoral artery and advanced in a retrograde manner into the aorta while the patient is undergoing cardiopulmonary resuscitation (CPR). The balloon is then inflated to fully occlude the aorta. The literature surrounding the use of aortic occlusion in non-traumatic cardiac arrest is limited to animal studies, case reports and one recent non-controlled feasibility trial. In both human and animal studies, preliminary data show that REBOA may improve coronary and cerebral perfusion pressures and key physiologic parameters during cardiac arrest resuscitation, and animal data have demonstrated improved rates of ROSC. Multiple questions remain before REBOA can be considered as an adjunct to ACLS. If demonstrated to be effective clinically, REBOA represents a potentially cost-effective and generalizable intervention that may improve quality of life for patients with non-traumatic cardiac arrest.
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Affiliation(s)
- Craig D. Nowadly
- Department of Emergency MedicineDavid Grant United States Air Force Medical CenterTravis Air Force BaseSacramentoCaliforniaUSA
- Department of Emergency MedicineUniversity of California at DavisSacramentoCaliforniaUSA
| | - M. Austin Johnson
- Division of Emergency MedicineUniversity of Utah School of MedicineSalt Lake CityUtahUSA
| | - Guillaume L. Hoareau
- Division of Emergency MedicineUniversity of Utah School of MedicineSalt Lake CityUtahUSA
| | - James E Manning
- Department of Emergency MedicineUniversity of North Carolina School of MedicineChapel HillUSA
| | - James I. Daley
- Department of Emergency MedicineYale University School of MedicineNew HavenConnecticutUSA
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13
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Zone 3 REBOA does not provide hemodynamic benefits during nontraumatic cardiac arrest. Am J Emerg Med 2020; 38:1915-1920. [PMID: 32750628 PMCID: PMC7301802 DOI: 10.1016/j.ajem.2020.06.003] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/31/2020] [Revised: 05/29/2020] [Accepted: 06/02/2020] [Indexed: 10/28/2022] Open
Abstract
BACKGROUND Resuscitative endovascular balloon occlusion of the aorta (REBOA) may be a novel intervention to improve cardiopulmonary resuscitation (CPR) quality during cardiac arrest. Zone 1 supraceliac aortic occlusion improves coronary and cerebral blood flow. It is unknown if Zone 3 occlusion distal to the renal arteries offers a similar physiologic benefit while maintaining blood flow to organs above the point of occlusion. METHODS Fifteen swine were anesthetized, instrumented, and placed into ventricular fibrillation. Mechanical CPR was immediately initiated. After 5 min of CPR, Zone 1 REBOA, Zone 3 REBOA, or no intervention (control) was initiated. Hemodynamic variables were continuously recorded for 30 min. RESULTS There were no significant differences between groups before REBOA deployment. Once REBOA was deployed, Zone 1 animals had statistically greater diastolic blood pressure compared to control (median [IQR]: 19.9 mmHg [9.5-20.5] vs 3.9 mmHg [2.4-4.8], p = .006). There were no differences in diastolic blood pressure between Zone 1 and Zone 3 (8.6 mmHg [5.1-13.1], p = .10) or between Zone 3 and control (p = .10). There were no significant differences in systolic blood pressure, cerebral blood flow, or time to return of spontaneous circulation (ROSC) between groups. CONCLUSION In our swine model of cardiac arrest, Zone 1 REBOA improved diastolic blood pressure when compared to control. Zone 3 does not offer a hemodynamic benefit when compared to no occlusion. Unlike prior studies, immediate use of REBOA after arrest did not result in an increase in ROSC rate, suggesting REBOA may be more beneficial in patients with prolonged no-flow time. INSTITUTIONAL PROTOCOL NUMBER FDG20180024A.
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14
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Resuscitative Endovascular Balloon Occlusion of the Aorta (REBOA) for Use in Temporizing Intra-Abdominal and Pelvic Hemorrhage: Physiologic Sequelae and Considerations. Shock 2020; 54:615-622. [DOI: 10.1097/shk.0000000000001542] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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15
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Hilbert-Carius P, McGreevy DT, Abu-Zidan FM, Hörer TM. Pre-hospital CPR and early REBOA in trauma patients - results from the ABOTrauma Registry. World J Emerg Surg 2020; 15:23. [PMID: 32228640 PMCID: PMC7104487 DOI: 10.1186/s13017-020-00301-8] [Citation(s) in RCA: 14] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/20/2019] [Accepted: 02/28/2020] [Indexed: 11/30/2022] Open
Abstract
Background Severely injured trauma patients suffering from traumatic cardiac arrest (TCA) and requiring cardiopulmonary resuscitation (CPR) rarely survive. The role of resuscitative endovascular balloon occlusion of the aorta (REBOA) performed early after hospital admission in patients with TCA is not well-defined. As the use of REBOA increases, there is great interest in knowing if there is a survival benefit related to the early use of REBOA after TCA. Using data from the ABOTrauma Registry, we aimed to study the role of REBOA used early after hospital admission in trauma patients who required pre-hospital CPR. Methods Retrospective and prospective data on the use of REBOA were collected from the ABOTrauma Registry from 11 centers in seven countries globally between 2014 and 2019. In all patients with pre-hospital TCA, the predicted probability of survival, calculated with the Revised Injury Severity Classification II (RISC II), was compared with the observed survival rate. Results Of 213 patients in the ABOTrauma Registry, 26 patients (12.2%) who had received pre-hospital CPR were identified. The median (range) Injury Severity Score (ISS) was 45.5 (25–75). Fourteen patients (54%) had been admitted to the hospital with ongoing CPR. Nine patients (35%) died within the first 24 h, while seventeen patients (65%) survived post 24 h. The survival rate to hospital discharge was 27% (n = 7). The predicted mortality using the RISC II was 0.977 (25 out of 26). The observed mortality (19 out of 26) was significantly lower than the predicted mortality (p = 0.049). Patients not responding to REBOA were more likely to die. Only one (10%) out of 10 non-responders survived. The survival rate in the 16 patients responding to REBOA was 37.5% (n = 6). REBOA with a median (range) duration of 45 (8–70) minutes significantly increases blood pressure from the median (range) 56.5 (0–147) to 90 (0–200) mmHg. Conclusions Mortality in patients suffering from TCA and receiving REBOA early after hospital admission is significantly lower than predicted by the RISC II. REBOA may improve survival after TCA. The use of REBOA in these patients should be further investigated.
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Affiliation(s)
- Peter Hilbert-Carius
- Department of Anesthesiology, Emergency and Intensive Care Medicine, Bergmannstrost BG-Klinikum Halle gGmbH, Merseburgerstr. 165, 06112, Halle, Germany.
| | - David T McGreevy
- Department of Cardiothoracic and Vascular Surgery, Faculty of Medicine and Health, Örebro University, Örebro, Sweden
| | - Fikri M Abu-Zidan
- Department of Surgery, College of Medicine and Health Science, UAE University, Al-Ain, United Arab Emirates
| | - Tal M Hörer
- Department of Cardiothoracic and Vascular Surgery, Faculty of Medicine and Health, Örebro University, Örebro, Sweden
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16
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Ribeiro Júnior MAF, Maurício AD, Costa CTK, Néder PR, Augusto SDS, Di-Saverio S, Brenner M. Expanding indications and results for the use of resuscitative endovascular balloon occlusion of the aorta - REBOA. ACTA ACUST UNITED AC 2019; 46:e20192334. [PMID: 31859727 DOI: 10.1590/0100-6991e-20192334] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/22/2019] [Accepted: 09/01/2019] [Indexed: 08/29/2023]
Abstract
Currently, resuscitative endovascular balloon occlusion of the aorta (REBOA) is used in trauma surgery for controlling non-compressible torso hemorrhages, as a less invasive option and with fewer physiologic disturbances compared with an invasive emergent thoracotomy for aortic cross-clamping. This can allow improvements in hemodynamic parameters until definitive surgery is performed. REBOA is also used in trauma to prevent hemodynamic collapse in patients who are in severe hemorrhagic shock, as a method to maintain perfusion of the brain and heart while decreasing distal bleeding until hemorrhage control can take place. The major complications reported are acute kidney injury, lower leg amputations, and even death. As experience with REBOA in emergency surgery grows, new indications have been described in the literature. The aim of this study was to assess the expansion of the use of REBOA in other areas of medicine, as well as evaluating the current published series. We performed an online search of PubMed, Medline and SciELO with the term "REBOA" in the last five years, and the articles included were the 14 specifically describing the use of REBOA for non-traumatic conditions. The results suggest that the use of REBOA led to improved bleeding control and increased arterial pressure, reducing blood transfusion requirements and allowing patients to survive to definitive treatment of injuries. In conclusion, the expanded use of REBOA for non-traumatic emergencies appears to be effective. However, prospective studies and well-established protocols for specific indications should be developed to maximize patient outcomes.
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Affiliation(s)
- Marcelo Augusto Fontenelle Ribeiro Júnior
- Hospital Moriah, Serviço de Cirurgia do Trauma, São Paulo, SP, Brasil.,Instituto de Assistência Médica ao Servidor Público Estadual de São Paulo (IAMSPE), Programa de de Pós-Graduação Stricto sensu em Ciências da Saúde, São Paulo, SP, Brasil
| | | | | | | | | | - Salomone Di-Saverio
- Cambridge University NHS Foundation Trust, Cambridge Biomedical Campus, Department of Surgery, Cambridge, UK, Inglaterra
| | - Megan Brenner
- Riverside University Health System, Surgical Research, Moreno Valley, CA, Estados Unidos da América
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Resuscitative Endovascular Balloon Occlusion of the Aorta for Refractory Out-of-Hospital Non-Traumatic Cardiac Arrest – A Case Report. Prehosp Disaster Med 2019; 34:566-568. [DOI: 10.1017/s1049023x19004795] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
Abstract
AbstractResuscitative endovascular balloon occlusion of the aorta (REBOA) is a percutaneous transfemoral balloon technique used in select centers for resuscitation and temporary hemostasis of bleeding patients. Several animal studies demonstrated that its application in non-traumatic cardiac arrest could enhance cerebral and coronary perfusion during cardiopulmonary resuscitation (CPR); despite this, there are few reports of its application in humans. This is a case report of REBOA application during a refractory out-of-hospital cardiac arrest in a 50-year-old man where Advanced Cardiac Life Support (ACLS) alone was unable to maintain a stable return of spontaneous circulation (ROSC) and Extracorporeal Cardiac Life Support (ECLS) was not available.
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18
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What's New in Shock, July 2019? Shock 2019; 52:1-4. [PMID: 31188264 DOI: 10.1097/shk.0000000000001350] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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19
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Osborn LA, Brenner ML, Prater SJ, Moore LJ. Resuscitative endovascular balloon occlusion of the aorta: current evidence. Open Access Emerg Med 2019; 11:29-38. [PMID: 30666171 PMCID: PMC6336022 DOI: 10.2147/oaem.s166087] [Citation(s) in RCA: 35] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/12/2023] Open
Abstract
Resuscitative endovascular balloon occlusion of the aorta (REBOA) has recently gained popularity as a minimally invasive alternative to open aortic cross-clamping in the management of patients with non-compressible hemorrhage arising below the diaphragm. The purpose of this review is to provide a description of the technical aspects of REBOA use along with an overview of the current animal and clinical data regarding its use.
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Affiliation(s)
- Lesley A Osborn
- Department of Emergency Medicine, The University of Texas Health Science Center, McGovern Medical School, Houston, TX, USA,
| | - Megan L Brenner
- Department of Surgery, The University of California - Riverside, Moreno Valley, CA, USA
| | - Samuel J Prater
- Department of Emergency Medicine, The University of Texas Health Science Center, McGovern Medical School, Houston, TX, USA,
| | - Laura J Moore
- Department of Surgery, The University of Texas Health Science Center, McGovern Medical School, Houston, TX, USA
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