1
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Trieu NHK, Mai TA, Pham HM. Critical hematological parameters in bleeding during extracorporeal membrane oxygenation support. J Artif Organs 2024:10.1007/s10047-024-01466-8. [PMID: 39133377 DOI: 10.1007/s10047-024-01466-8] [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: 05/04/2024] [Accepted: 08/06/2024] [Indexed: 08/13/2024]
Abstract
Bleeding complications are frequently observed in patients undergoing extracorporeal membrane oxygenation and are associated with increased mortality. Due to the complex mechanisms, managing bleeding during ECMO remains a challenge. Acquired von Willebrand syndrome (AVWS) in ECMO highlights a potentially reduced affinity of von Willebrand factor (vWF) for binding to platelets and collagen in response to vascular damage, thus contributing to increased bleeding in ECMO patients. Conventional coagulation parameters are incomplete predictors for bleeding in ECMO patients, whereas AVWS is often overlooked due to the absence of vWF evaluation in the coagulation profile. Therefore, clinical physicians should evaluate AVWS in patients experiencing bleeding complications during ECMO support.
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Affiliation(s)
- Ngan Hoang Kim Trieu
- Department of Intensive Care Medicine, Cho Ray Hospital, Ho Chi Minh City, Vietnam.
| | - Tuan Anh Mai
- Detroit Medical Center, Wayne State University, Detroit, USA
| | - Huy Minh Pham
- Department of Intensive Care Medicine, Cho Ray Hospital, Ho Chi Minh City, Vietnam
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2
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Georges G, Trudeau F, Potvin J, Potus F, Martineau S, Généreux P. Preservation of von Willebrand Factor Activity With the ModulHeart Device. JACC Basic Transl Sci 2024; 9:33-42. [PMID: 38362340 PMCID: PMC10864901 DOI: 10.1016/j.jacbts.2023.07.005] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/02/2023] [Revised: 07/10/2023] [Accepted: 07/10/2023] [Indexed: 02/17/2024]
Abstract
von Willebrand Factor (VWF) destruction is common with current heart pumps. This study evaluates VWF activity with ModulHeart, a novel device using 3 micropumps in parallel. In model 1, ModulHeart was compared with Impella devices in vitro. In model 2, 3 healthy swine received ModulHeart. Model 3 includes VWF data from patients who underwent protected percutaneous coronary intervention with ModulHeart. In models 1, 2, and 3, ModulHeart resulted in preservation of VWF, whereas there was a 27% and 19% reduction in VWF activity with the Impella CP and 5.0, respectively. ModulHeart features a unique design and demonstrated preservation of VWF activity.
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Affiliation(s)
| | | | - Jeannot Potvin
- Centre Hospitalier de l’Université de Montréal, Montreal, Quebec, Canada
| | | | | | - Philippe Généreux
- Gagnon Cardiovascular Institute, Morristown Medical Center, Morristown, New Jersey, USA
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3
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Bańka P, Wybraniec M, Bochenek T, Gruchlik B, Burchacka A, Swinarew A, Mizia-Stec K. Influence of Aortic Valve Stenosis and Wall Shear Stress on Platelets Function. J Clin Med 2023; 12:6301. [PMID: 37834945 PMCID: PMC10573628 DOI: 10.3390/jcm12196301] [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: 08/28/2023] [Revised: 09/19/2023] [Accepted: 09/26/2023] [Indexed: 10/15/2023] Open
Abstract
Aortic valve stenosis (AS) is a common heart valve disease in the elderly population, and its pathogenesis remains an interesting area of research. The degeneration of the aortic valve leaflets gradually progresses to valve sclerosis. The advanced phase is marked by the presence of extracellular fibrosis and calcification. Turbulent, accelerated blood flow generated by the stenotic valve causes excessive damage to the aortic wall. Elevated shear stress due to AS leads to the degradation of high-molecular weight multimers of von Willebrand factor, which may involve bleeding in the mucosal tissues. Conversely, elevated shear stress has been associated with the release of thrombin and the activation of platelets, even in individuals with acquired von Willebrand syndrome. Moreover, turbulent blood flow in the aorta may activate the endothelium and promote platelet adhesion and activation on the aortic valve surface. Platelets release a wide range of mediators, including lysophosphatidic acid, which have pro-osteogenic effects in AS. All of these interactions result in blood coagulation, fibrinolysis, and the hemostatic process. This review summarizes the current knowledge on high shear stress-induced hemostatic disorders, the influence of AS on platelets and antiplatelet therapy.
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Affiliation(s)
- Paweł Bańka
- First Department of Cardiology, School of Medicine in Katowice, Medical University of Silesia, 40-635 Katowice, Poland
| | - Maciej Wybraniec
- First Department of Cardiology, School of Medicine in Katowice, Medical University of Silesia, 40-635 Katowice, Poland
| | - Tomasz Bochenek
- First Department of Cardiology, School of Medicine in Katowice, Medical University of Silesia, 40-635 Katowice, Poland
| | - Bartosz Gruchlik
- First Department of Cardiology, School of Medicine in Katowice, Medical University of Silesia, 40-635 Katowice, Poland
| | - Aleksandra Burchacka
- First Department of Cardiology, School of Medicine in Katowice, Medical University of Silesia, 40-635 Katowice, Poland
| | - Andrzej Swinarew
- Faculty of Science and Technology, University of Silesia in Katowice, 40-007 Katowice, Poland
- Department of Swimming and Water Rescue, Institute of Sport Science, The Jerzy Kukuczka Academy of Physical Education, 40-065 Katowice, Poland
| | - Katarzyna Mizia-Stec
- First Department of Cardiology, School of Medicine in Katowice, Medical University of Silesia, 40-635 Katowice, Poland
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4
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Li Y, Xi Y, Wang H, Sun A, Wang L, Deng X, Chen Z, Fan Y. Development and validation of a mathematical model for evaluating shear-induced damage of von Willebrand factor. Comput Biol Med 2023; 164:107379. [PMID: 37597407 DOI: 10.1016/j.compbiomed.2023.107379] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/27/2023] [Revised: 08/10/2023] [Accepted: 08/14/2023] [Indexed: 08/21/2023]
Abstract
PURPOSE To develop a mathematical model for predicting shear-induced von Willebrand factor (vWF) function modification which can be used to guide ventricular assist devices (VADs) design, and evaluate the damage of high molecular weight multimers (HMWM)-vWF in VAD patients for reducing clinical complications. METHODS Mathematical models were constructed based on three morphological variations (globular vWF, unfolded vWF and degraded vWF) of vWF under shear stress conditions, in which parameters were obtained from previous studies or fitted by experimental data. Different clinical support modes (pediatric vs. adult mode), different VAD operating states (pulsation vs. constant mode) and different clinical VADs (HeartMate II, HeartWare and CentriMag) were utilized to analyze shear-induced damage of HMWM-vWF based on our vWF model. The accuracy and feasibility of the models were evaluated using various experimental and clinical cases, and the biomechanical mechanisms of HMWM-vWF degradation induced by VADs were further explained. RESULTS The mathematical model developed in this study predicted VAD-induced HMWM-vWF degradation with high accuracy (correlation with experimental data r2 > 0.99). The numerical results showed that VAD in the pediatric mode resulted in more HMWM-vWF degradation per unit time and per unit flow rate than in the adult mode. However, the total degradation of HMWM-vWF is less in the pediatric mode than in the adult mode because the pediatric mode has fewer times of blood circulation than the adult mode in the same amount of time. The ratio of HMWM-vWF degradation was lower in the pulsation mode than in the constant mode. This is due to the increased flushing of VADs in the pulsation mode, which avoids prolonged stagnation of blood in high shear regions. This study also found that the design feature, rotor size and volume of the VADs, and the superimposed regions of high shear stress and long residence time inside VADs affect the degradation of HMWM-vWF. The axial flow VADs (HeartMate II) showed higher degradation of HMWM-vWF compared to centrifugal VADs (HeartWare and CentriMag). Compared to fully magnetically suspended VADs (CentriMag), hydrodynamic suspended VADs (HeartWare) produced extremely high degradation of HWMW-vWF in its narrow hydrodynamic clearance. Finally, the study used a mathematical model of HMWM-vWF degradation to interpret the clinical statistics from a biomechanical perspective and found that minimizing the rotating speed of VADs within reasonable limits helps to reduce HWMW-vWF degradation. All predicted conclusions are supported by the experimental and clinical data. CONCLUSION This study provides a validated mathematical model to assess the shear-induced degradation of HMWM-vWF, which can help to evaluate the damage of HMWM-vWF in patients implanted with VADs for reducing clinical complications, and to guide the optimization of VADs for improving hemocompatibility.
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Affiliation(s)
- Yuan Li
- Key Laboratory of Biomechanics and Mechanobiology (Beihang University), Ministry of Education, Beijing Advanced Innovation Center for Biomedical Engineering, School of Biological Science and Medical Engineering, Beihang University, Beijing, 100083, China
| | - Yifeng Xi
- Key Laboratory of Biomechanics and Mechanobiology (Beihang University), Ministry of Education, Beijing Advanced Innovation Center for Biomedical Engineering, School of Biological Science and Medical Engineering, Beihang University, Beijing, 100083, China
| | - Hongyu Wang
- Key Laboratory of Biomechanics and Mechanobiology (Beihang University), Ministry of Education, Beijing Advanced Innovation Center for Biomedical Engineering, School of Biological Science and Medical Engineering, Beihang University, Beijing, 100083, China
| | - Anqiang Sun
- Key Laboratory of Biomechanics and Mechanobiology (Beihang University), Ministry of Education, Beijing Advanced Innovation Center for Biomedical Engineering, School of Biological Science and Medical Engineering, Beihang University, Beijing, 100083, China
| | - Lizhen Wang
- Key Laboratory of Biomechanics and Mechanobiology (Beihang University), Ministry of Education, Beijing Advanced Innovation Center for Biomedical Engineering, School of Biological Science and Medical Engineering, Beihang University, Beijing, 100083, China
| | - Xiaoyan Deng
- Key Laboratory of Biomechanics and Mechanobiology (Beihang University), Ministry of Education, Beijing Advanced Innovation Center for Biomedical Engineering, School of Biological Science and Medical Engineering, Beihang University, Beijing, 100083, China
| | - Zengsheng Chen
- Key Laboratory of Biomechanics and Mechanobiology (Beihang University), Ministry of Education, Beijing Advanced Innovation Center for Biomedical Engineering, School of Biological Science and Medical Engineering, Beihang University, Beijing, 100083, China.
| | - Yubo Fan
- Key Laboratory of Biomechanics and Mechanobiology (Beihang University), Ministry of Education, Beijing Advanced Innovation Center for Biomedical Engineering, School of Biological Science and Medical Engineering, Beihang University, Beijing, 100083, China.
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5
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Jhun CS, Xu L, Siedlecki C, Bartoli CR, Yeager E, Lukic B, Scheib CM, Newswanger R, Cysyk JP, Shen C, Bohnenberger K, Weiss WJ, Rosenberg G. Kinetic and Dynamic Effects on Degradation of von Willebrand Factor. ASAIO J 2023; 69:467-474. [PMID: 36399789 PMCID: PMC10143388 DOI: 10.1097/mat.0000000000001848] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022] Open
Abstract
The loss of high molecular weight multimers (HMWM) of von Willebrand factor (vWF) in aortic stenosis (AS) and continuous-flow left ventricular assist devices (cf-LVADs) is believed to be associated with high turbulent blood shear. The objective of this study is to understand the degradation mechanism of HMWM in terms of exposure time (kinetic) and flow regime (dynamics) within clinically relevant pathophysiologic conditions. A custom high-shear rotary device capable of creating fully controlled exposure times and flows was used. The system was set so that human platelet-poor plasma flowed through at 1.75 ml/sec, 0.76 ml/sec, or 0.38 ml/sec resulting in the exposure time ( texp ) of 22, 50, or 100 ms, respectively. The flow was characterized by the Reynolds number (Re). The device was run under laminar (Re = 1,500), transitional (Re = 3,000; Re = 3,500), and turbulent (Re = 4,500) conditions at a given texp followed by multimer analysis. No degradation was observed at laminar flow at all given texp . Degradation of HMWM at a given texp increases with the Re. Re ( p < 0.0001) and texp ( p = 0.0034) are significant factors in the degradation of HMWM. Interaction between Re and texp , however, is not always significant ( p = 0.73).
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Affiliation(s)
- Choon-Sik Jhun
- From the Division of Applied Biomedical Engineering, Department of Surgery, The Pennsylvania State University, College of Medicine, Hershey, Pennsylvania
| | - Lichong Xu
- From the Division of Applied Biomedical Engineering, Department of Surgery, The Pennsylvania State University, College of Medicine, Hershey, Pennsylvania
| | - Christopher Siedlecki
- From the Division of Applied Biomedical Engineering, Department of Surgery, The Pennsylvania State University, College of Medicine, Hershey, Pennsylvania
- Department of Biomedical Engineering, College of Engineering, The Pennsylvania State University, University Park, Pennsylvania
| | - Carlo R. Bartoli
- Department of Cardiothoracic Surgery, Geisinger Medical Center, Danville, Pennsylvania
| | - Eric Yeager
- From the Division of Applied Biomedical Engineering, Department of Surgery, The Pennsylvania State University, College of Medicine, Hershey, Pennsylvania
| | - Branka Lukic
- From the Division of Applied Biomedical Engineering, Department of Surgery, The Pennsylvania State University, College of Medicine, Hershey, Pennsylvania
| | - Christopher M. Scheib
- From the Division of Applied Biomedical Engineering, Department of Surgery, The Pennsylvania State University, College of Medicine, Hershey, Pennsylvania
| | - Raymond Newswanger
- From the Division of Applied Biomedical Engineering, Department of Surgery, The Pennsylvania State University, College of Medicine, Hershey, Pennsylvania
| | - Joshua P. Cysyk
- From the Division of Applied Biomedical Engineering, Department of Surgery, The Pennsylvania State University, College of Medicine, Hershey, Pennsylvania
| | - Chan Shen
- Division of Outcomes Research and Quality, Department of Surgery, The Pennsylvania State University, College of Medicine, Hershey, Pennsylvania
| | - Karl Bohnenberger
- From the Division of Applied Biomedical Engineering, Department of Surgery, The Pennsylvania State University, College of Medicine, Hershey, Pennsylvania
| | - William J. Weiss
- From the Division of Applied Biomedical Engineering, Department of Surgery, The Pennsylvania State University, College of Medicine, Hershey, Pennsylvania
- Department of Biomedical Engineering, College of Engineering, The Pennsylvania State University, University Park, Pennsylvania
| | - Gerson Rosenberg
- From the Division of Applied Biomedical Engineering, Department of Surgery, The Pennsylvania State University, College of Medicine, Hershey, Pennsylvania
- Department of Biomedical Engineering, College of Engineering, The Pennsylvania State University, University Park, Pennsylvania
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6
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Wolfe DS, Liu C, Alboucai J, Karten A, Mushi J, Yellin S, Berkowitz JL, Vega S, Felix N, Liaqat W, Kankaria R, Vorawandthanachai T, Bortnick AE. Maternal Outcomes in Women with Peripartum Cardiomyopathy versus Age and Race-Matched Peers in an Urban US Community. J Cardiovasc Dev Dis 2022; 9:250. [PMID: 36005414 PMCID: PMC9410188 DOI: 10.3390/jcdd9080250] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/29/2022] [Revised: 08/01/2022] [Accepted: 08/03/2022] [Indexed: 11/16/2022] Open
Abstract
Peripartum cardiomyopathy (PPCM) is idiopathic systolic congestive heart failure around pregnancy. Comparisons with matched controls are lacking. We investigated maternal characteristics and outcomes up to 12 months in a cohort admitted to Montefiore Health System in Bronx, New York 1999−2015 (n = 53 cases and n = 92 age and race-matched controls, >80% Black or Hispanic/Latina). Compared to peers, women with PPCM had more chronic hypertension (24.5% vs. 8.8%, p = 0.001), prior gestational hypertension (20.8% vs. 5.4%, p = 0.001), prior preeclampsia (17.0% vs. 3.3%, p = 0.001), familial dilated cardiomyopathy (5.7% vs. 0.0%, p = 0.04), smoking (15.1% vs. 2.2%, p = 0.001), lower summary socioeconomic scores (−4.12 (IQR −6.81, −2.13) vs. −1.62 (IQR −4.20, −0.74), p < 0.001), public insurance (67.9% vs. 29.3% p = 0.001), and frequent depressive symptoms. Women with PPCM were often admitted antepartum (34.0% vs. 18.5%, p = 0.001) and underwent Cesarean section (65.4% vs. 30.4%, p = 0.001), but had less preterm labor (27.3% vs. 51.1%, p = 0.001). Women were rarely treated with bromocriptine (3.8%), frequently underwent left ventricular assist device placement (9.4% and n = 2 with menorrhagia requiring transfusion and progesterone) or heart transplantation (3.8%), but there were no in-hospital deaths. In sum, women with PPCM had worse socioeconomic disadvantage and baseline health than matched peers. Programs addressing social determinants of health may be important for women at high risk of PPCM.
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Affiliation(s)
- Diana S. Wolfe
- Department of Obstetrics and Gynecology, Montefiore Medical Center, Albert Einstein College of Medicine, Bronx, NY 10461, USA
- Maternal Fetal Medicine-Cardiology Joint Program, Montefiore Medical Center, Albert Einstein College of Medicine, Bronx, NY 10461, USA
| | - Christina Liu
- Department of Emergency Medicine, Woodhull Medical and Mental Health Center, Brooklyn, NY 11206, USA
| | - Jack Alboucai
- Department of Medicine, North Shore University Hospital, Manhasset, NY 11030, USA
| | - Ariel Karten
- Department of Medicine, Division of Cardiology, New York University Long Island School of Medicine, Mineola, NY 11501, USA
| | - Juliet Mushi
- Department of Obstetrics, Gynecology & Reproductive Sciences, Yale University Maternal Fetal Medicine, Greenwich Hospital, Greenwich, CT 06830, USA
| | - Shira Yellin
- Department of Medicine, Mount Sinai Health System, New York, NY 10029, USA
| | - Julia L. Berkowitz
- Department of Medicine, Brown University Warren Alpert Medical School, Providence, RI 02903, USA
| | - Shayna Vega
- Department of Obstetrics and Gynecology, Kaiser Permanente Oakland Medical Center, Oakland, CA 94611, USA
| | - Nicole Felix
- Department of Psychiatry and Human Behavior, Brown University Warren Alpert Medical School, Providence, RI 02903, USA
| | - Wasla Liaqat
- Department of Medicine, New York Health and Hospitals Jacobi Medical Center, Bronx, NY 10461, USA
| | - Rohan Kankaria
- Department of Medicine, Division of Cardiology, Albert Einstein College of Medicine, Bronx, NY 10461, USA
| | | | - Anna E. Bortnick
- Maternal Fetal Medicine-Cardiology Joint Program, Montefiore Medical Center, Albert Einstein College of Medicine, Bronx, NY 10461, USA
- Department of Medicine, Division of Cardiology, Albert Einstein College of Medicine, Bronx, NY 10461, USA
- Department of Medicine, Division of Geriatrics, Montefiore Medical Center, Albert Einstein College of Medicine, Bronx, NY 10461, USA
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7
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Goodman D, Stulak J, Rosenbaum AN. Left ventricular assist devices: A historical perspective at the intersection of medicine and engineering. Artif Organs 2022; 46:2343-2360. [PMID: 35929377 DOI: 10.1111/aor.14371] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/06/2022] [Revised: 07/06/2022] [Accepted: 07/18/2022] [Indexed: 11/26/2022]
Abstract
Over the last half-century, left ventricular assist device (LVAD) technology has progressed from conceptual therapy for failed cardiopulmonary bypass weaning to an accepted destination therapy for advanced heart failure. The history of LVAD engineering is defined by an initial development phase, which demonstrated the feasibility of such an approach, to the more recent three major generations of commercial devices. In this review, we explore the engineering challenges of LVADs, how they were addressed over time, and the clinical outcomes that resulted from each major technological development. The first generation of commercial LVADs were pulsatile devices, which lacked the appropriate durability due to their number of moving components and hemocompatibility. The second generation of LVADs was defined by replacement of complex, pulsatile pumps with primarily axial, continuous-flow systems with an impeller in the blood passageway. These devices experienced significant commercial success, but the presence of excessive trauma to the blood and in-situ bearing resulted in an unacceptable burden of adverse events. Third generation centrifugal-flow pumps use magnetically suspended rotors within the pump chamber. Superior outcomes with this newest generation of devices have been observed, particularly with respect to hemocompatibility-related adverse events including pump thrombosis, with fully magnetically levitated devices. The future of LVAD engineering includes wireless charging foregoing percutaneous drivelines and more advanced pump control mechanisms, including synchronization of the pump flow with the native cardiac cycle, and varying pump output based on degree of physical exertion using sensor or advanced device-level data triggers.
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Affiliation(s)
- Daniel Goodman
- College of Osteopathic Medicine, Des Moines University, Des Moines, Iowa, USA
| | - John Stulak
- Division of Cardiovascular Surgery, Mayo Clinic, Rochester, Minnesota, USA
| | - Andrew N Rosenbaum
- Department of Cardiovascular Diseases, Mayo Clinic Minnesota, Rochester, Minnesota, USA
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8
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Oezkur M, Reda S, Rühl H, Theuerkauf N, Kreyer S, Duerr GD, Charitos E, Silaschi M, Medina M, Zimmer S, Putensen C, Treede H. Role of acquired von Willebrand syndrome in the development of bleeding complications in patients treated with Impella RP devices. Sci Rep 2021; 11:23722. [PMID: 34887445 PMCID: PMC8660831 DOI: 10.1038/s41598-021-02833-8] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/25/2021] [Accepted: 11/16/2021] [Indexed: 11/09/2022] Open
Abstract
Axial flow pumps are standard treatment in cases of cardiogenic shock and high-risk interventions in cardiology and cardiac surgery, although the optimal anticoagulation strategy remains unclear. We evaluated whether laboratory findings could predict bleeding complications and acquired von Willebrand syndrome (avWS) among patients who were treated using axial flow pumps. We retrospectively evaluated 60 consecutive patients who received Impella devices (Impella RP: n = 20, Impella CP/5.0: n = 40; Abiomed Inc., Danvers, USA) between January 2019 and December 2020. Thirty-two patients (53.3%) experienced major or fatal bleeding complications (Bleeding Academic Research Consortium score of > 3) despite intravenous heparin being used to maintain normal activated partial thromboplastin times (40–50 s). Extensive testing was performed for 28 patients with bleeding complications (87.5%). Relative to patients with left ventricular support, patients with right ventricular support were less likely to develop avWS (87.5% vs. 58.8%, p = 0.035). Bleeding was significantly associated with avWS (odds ratio [OR]: 20.8, 95% confidence interval [CI]: 3.3–128.5; p = 0.001) and treatment duration (OR: 1.3, 95% CI 1.09–1.55; p = 0.003). Patients with avWS had longer Impella treatment than patients without avWS (2 days [1–4.7 days] vs. 7.3 days [3.2–13.0 days]). Bleeding complications during Impella support were associated with avWS in our cohort, while aPTT monitoring was not sufficient to prevent bleeding complications. A more targeted anticoagulation monitoring might be needed for patients who receive Impella devices.
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Affiliation(s)
- Mehmet Oezkur
- Department of Cardiovascular Surgery, University Hospital of Bonn, Bonn, Germany. .,Department of Cardiovascular Surgery, University Hospital Mainz, Langenbeckstrasse 1, 55131, Mainz, Germany.
| | - Sara Reda
- Department of Haematology, University Hospital of Bonn, Bonn, Germany
| | - Heiko Rühl
- Department of Haematology, University Hospital of Bonn, Bonn, Germany
| | - Nils Theuerkauf
- Department of Anesthesiology and Intensive Care Medicine, University Hospital of Bonn, Bonn, Germany
| | - Stefan Kreyer
- Department of Anesthesiology and Intensive Care Medicine, University Hospital of Bonn, Bonn, Germany
| | - Georg Daniel Duerr
- Department of Cardiovascular Surgery, University Hospital of Bonn, Bonn, Germany.,Department of Cardiovascular Surgery, University Hospital Mainz, Langenbeckstrasse 1, 55131, Mainz, Germany
| | - Efstratios Charitos
- Department of Cardiovascular Surgery, University Hospital of Bonn, Bonn, Germany
| | - Miriam Silaschi
- Department of Cardiovascular Surgery, University Hospital of Bonn, Bonn, Germany
| | - Marta Medina
- Department of Cardiovascular Surgery, University Hospital of Bonn, Bonn, Germany
| | - Sebastian Zimmer
- Department of Cardiology, University Hospital of Bonn, Bonn, Germany
| | - Christian Putensen
- Department of Anesthesiology and Intensive Care Medicine, University Hospital of Bonn, Bonn, Germany
| | - Hendrik Treede
- Department of Cardiovascular Surgery, University Hospital of Bonn, Bonn, Germany.,Department of Cardiovascular Surgery, University Hospital Mainz, Langenbeckstrasse 1, 55131, Mainz, Germany
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9
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Woelke E, Mager I, Schmitz-Rode T, Steinseifer U, Clauser JC. Validation of a Miniaturized Test Loop for the Assessment of Human Blood Damage by Continuous-Flow Left-Ventricular Assist Devices. Ann Biomed Eng 2021; 49:3165-3175. [PMID: 34431015 PMCID: PMC8671281 DOI: 10.1007/s10439-021-02849-1] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/29/2021] [Accepted: 08/04/2021] [Indexed: 11/29/2022]
Abstract
Despite improved hemocompatibility of left-ventricular assist devices (LVADs), assessment of blood damage remains mandatory in preclinical testing as standardized by ASTM-F1841. The most relevant test fluid is fresh, non-pooled human blood, but the limited volume of a standard donation requires significantly smaller loops than those commonly used with animal blood. In a recent study with porcine blood, we verified a miniaturized test loop with only 160 mL for the ASTM-conform paired testing of at least two LVADs and a static reference. Here, we validated this mini test loop for standardized assessment of blood damage with one 450-mL single donation of fresh human blood. Blood damage was assessed for HeartMate 3 and BPX-80 in 9 experiments with heparinized human blood for 6 hours. We analyzed plasma free hemoglobin, von Willebrand factor (vWF) concentration and collagen-binding functionality and calculated indices of hemolysis and vWF-ratios. Overall, we observed less blood damage compared to our previous study; however, the differences in mean indices of hemolysis and in mean normalized vWF-ratio between BPX-80 and HeartMate 3 were consistent for human blood. Thus, our mini test loop proved to be valid for preclinical standardized assessment of blood damage with only 450 mL of fresh human blood.
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Affiliation(s)
- Eva Woelke
- Department of Cardiovascular Engineering, Institute of Applied Medical Engineering, Helmholtz Institute, Medical Faculty, RWTH Aachen University, Pauwelsstr. 20, 52074, Aachen, Germany
| | - Ilona Mager
- Department of Cardiovascular Engineering, Institute of Applied Medical Engineering, Helmholtz Institute, Medical Faculty, RWTH Aachen University, Pauwelsstr. 20, 52074, Aachen, Germany
| | - Thomas Schmitz-Rode
- Department of Cardiovascular Engineering, Institute of Applied Medical Engineering, Helmholtz Institute, Medical Faculty, RWTH Aachen University, Pauwelsstr. 20, 52074, Aachen, Germany
| | - Ulrich Steinseifer
- Department of Cardiovascular Engineering, Institute of Applied Medical Engineering, Helmholtz Institute, Medical Faculty, RWTH Aachen University, Pauwelsstr. 20, 52074, Aachen, Germany
| | - Johanna C Clauser
- Department of Cardiovascular Engineering, Institute of Applied Medical Engineering, Helmholtz Institute, Medical Faculty, RWTH Aachen University, Pauwelsstr. 20, 52074, Aachen, Germany.
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10
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Jhun CS, Newswanger R, Cysyk JP, Ponnaluri S, Good B, Manning KB, Rosenberg G. Dynamics of Blood Flows in Aortic Stenosis: Mild, Moderate, and Severe. ASAIO J 2021; 67:666-674. [PMID: 33164999 PMCID: PMC8093327 DOI: 10.1097/mat.0000000000001296] [Citation(s) in RCA: 10] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022] Open
Abstract
Supraphysiologic high shear stresses created in calcific aortic stenosis (AS) are known to cause hemostatic abnormalities, however, the relationship between the complex blood flows over the severity of AS and hemostatic abnormalities still remains unclear. This study systematically characterized the blood flow in mild, moderate, and severe AS. A series of large eddy simulations (LES) validated by particle image velocimetry were performed on physiologically representative AS models with a peak physiologic flow condition of 18 liter per minute. Time-accurate velocity fields, transvalvular pressure gradient, and laminar viscous-and turbulent (or Reynolds) shear stresses (RSSmax) were evaluated for each degree of severity. The peak velocities of mild, moderate, and severe AS were on the order of 2.0, 4.0, and 8.0 m/s, respectively. Jet velocity in severe AS was highly skewed with extremely high velocity (as high as 8 m/s) and mainly traveled through the posterior aortic wall up to the aortic arch while still carrying a relatively high velocity, that is, >4 m/s. The mean laminar viscous wall shear stresses (WSS) for mild, moderate, and severe AS were on the order of 40, 100, and 180 Pa, respectively. The RSSmax were on the order of 260, 490, and 2,500 Pa for mild, moderate, and severe AS, respectively. This study may provide a link between altered flows in AS and hemostatic abnormalities such as acquired von Willebrand syndrome and hemolysis, thus, help diagnosing and timing of the treatment.
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Affiliation(s)
- Choon-Sik Jhun
- Department of Surgery, The Pennsylvania State University, College of Medicine, Hershey, PA
| | - Raymond Newswanger
- Department of Surgery, The Pennsylvania State University, College of Medicine, Hershey, PA
| | - Joshua P. Cysyk
- Department of Surgery, The Pennsylvania State University, College of Medicine, Hershey, PA
| | - Sailahari Ponnaluri
- Department of Biomedical Engineering, College of Engineering, The Pennsylvania State University, University Park, PA
| | - Bryan Good
- Department of Biomedical Engineering, College of Engineering, The Pennsylvania State University, University Park, PA
| | - Keefe B. Manning
- Department of Biomedical Engineering, College of Engineering, The Pennsylvania State University, University Park, PA
| | - Gerson Rosenberg
- Department of Surgery, The Pennsylvania State University, College of Medicine, Hershey, PA
- Department of Biomedical Engineering, College of Engineering, The Pennsylvania State University, University Park, PA
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11
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Manning KB, Deutsch S, Rosenberg G. John M. Tarbell: Artificial Heart and Mechanical Heart Valve Research Contributions. Cardiovasc Eng Technol 2021; 12:9-14. [PMID: 33409858 DOI: 10.1007/s13239-020-00510-x] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/17/2020] [Accepted: 12/05/2020] [Indexed: 10/22/2022]
Affiliation(s)
- Keefe B Manning
- Department of Biomedical Engineering, The Pennsylvania State University, 122 CBE Building, University Park, PA, 16802, USA. .,Department of Surgery, Penn State Hershey Medical Center, Hershey, PA, USA.
| | - Steven Deutsch
- Department of Biomedical Engineering, The Pennsylvania State University, 122 CBE Building, University Park, PA, 16802, USA
| | - Gerson Rosenberg
- Department of Biomedical Engineering, The Pennsylvania State University, 122 CBE Building, University Park, PA, 16802, USA.,Department of Surgery, Penn State Hershey Medical Center, Hershey, PA, USA
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12
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Köhne I. Kontinuierlich fördernde Blutpumpen für die Langzeitherzunterstützung. ZEITSCHRIFT FUR HERZ THORAX UND GEFASSCHIRURGIE 2020. [DOI: 10.1007/s00398-020-00398-8] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
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13
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Ferrari A, Giampietro C, Bachmann B, Bernardi L, Bezuidenhhout D, Ermanni P, Hopf R, Kitz S, Kress G, Loosli C, Marina V, Meboldt M, Pellegrini G, Poulikakos D, Rebholz M, Schmid Daners M, Schmidt T, Starck C, Stefopoulos G, Sündermann S, Thamsen B, Zilla P, Potapov E, Falk V, Mazza E. A Novel Hybrid Membrane VAD as First Step Toward Hemocompatible Blood Propulsion. Ann Biomed Eng 2020; 49:716-731. [PMID: 32901382 PMCID: PMC7851026 DOI: 10.1007/s10439-020-02590-1] [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: 02/26/2020] [Accepted: 08/11/2020] [Indexed: 12/31/2022]
Abstract
Heart failure is a raising cause of mortality. Heart transplantation and ventricular assist device (VAD) support represent the only available lifelines for end stage disease. In the context of donor organ shortage, the future role of VAD as destination therapy is emerging. Yet, major drawbacks are connected to the long-term implantation of current devices. Poor VAD hemocompatibility exposes the patient to life-threatening events, including haemorrhagic syndromes and thrombosis. Here, we introduce a new concept of artificial support, the Hybrid Membrane VAD, as a first-of-its-kind pump prototype enabling physiological blood propulsion through the cyclic actuation of a hyperelastic membrane, enabling the protection from the thrombogenic interaction between blood and the implant materials. The centre of the luminal membrane surface displays a rationally-developed surface topography interfering with flow to support a living endothelium. The precast cell layer survives to a range of dynamically changing pump actuating conditions i.e., actuation frequency from 1 to 4 Hz, stroke volume from 12 to 30 mL, and support duration up to 313 min, which are tested both in vitro and in vivo, ensuring the full retention of tissue integrity and connectivity under challenging conditions. In summary, the presented results constitute a proof of principle for the Hybrid Membrane VAD concept and represent the basis for its future development towards clinical validation.
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Affiliation(s)
- Aldo Ferrari
- Laboratory of Thermodynamics in Emerging Technologies, Department of Mechanical and Process Engineering, ETH Zurich, Sonneggstrasse 3, 8092, Zurich, Switzerland. .,EMPA, Swiss Federal Laboratories for Material Science and Technologies, Überlandstrasse 129, 8600, Dübendorf, Switzerland. .,Institute for Mechanical Systems, ETH Zurich, 8092, Zurich, Switzerland.
| | - Costanza Giampietro
- Laboratory of Thermodynamics in Emerging Technologies, Department of Mechanical and Process Engineering, ETH Zurich, Sonneggstrasse 3, 8092, Zurich, Switzerland.,EMPA, Swiss Federal Laboratories for Material Science and Technologies, Überlandstrasse 129, 8600, Dübendorf, Switzerland
| | - Björn Bachmann
- Laboratory of Thermodynamics in Emerging Technologies, Department of Mechanical and Process Engineering, ETH Zurich, Sonneggstrasse 3, 8092, Zurich, Switzerland
| | - Laura Bernardi
- Institute for Mechanical Systems, ETH Zurich, 8092, Zurich, Switzerland
| | - Deon Bezuidenhhout
- Christiaan Barnard Division of Cardiothoracic Surgery, University of Cape Town, Cape Town, South Africa
| | - Paolo Ermanni
- Laboratory of Composite Materials and Adaptive Structures, ETH Zurich, 8092, Zurich, Switzerland
| | - Raoul Hopf
- EMPA, Swiss Federal Laboratories for Material Science and Technologies, Überlandstrasse 129, 8600, Dübendorf, Switzerland.,Institute for Mechanical Systems, ETH Zurich, 8092, Zurich, Switzerland
| | - Sarah Kitz
- Laboratory for Animal Model Pathology, Institute of Veterinary Pathology, Vetsuisse Faculty, University of Zurich, Zurich, Switzerland
| | - Gerald Kress
- Laboratory of Composite Materials and Adaptive Structures, ETH Zurich, 8092, Zurich, Switzerland
| | - Christian Loosli
- Laboratory of Composite Materials and Adaptive Structures, ETH Zurich, 8092, Zurich, Switzerland
| | - Vita Marina
- Institute for Mechanical Systems, ETH Zurich, 8092, Zurich, Switzerland
| | - Mirko Meboldt
- Product Development Group Zurich, Department of Mechanical and Process Engineering, ETH Zurich, Zurich, Switzerland
| | - Giovanni Pellegrini
- Laboratory for Animal Model Pathology, Institute of Veterinary Pathology, Vetsuisse Faculty, University of Zurich, Zurich, Switzerland
| | - Dimos Poulikakos
- Laboratory of Thermodynamics in Emerging Technologies, Department of Mechanical and Process Engineering, ETH Zurich, Sonneggstrasse 3, 8092, Zurich, Switzerland
| | - Mathias Rebholz
- Product Development Group Zurich, Department of Mechanical and Process Engineering, ETH Zurich, Zurich, Switzerland
| | - Marianne Schmid Daners
- Product Development Group Zurich, Department of Mechanical and Process Engineering, ETH Zurich, Zurich, Switzerland
| | - Tanja Schmidt
- Julius Wolff Institute and Center for Musculoskeletal Surgery, Charité - Universitätsmedizin, Berlin, Germany
| | - Christoph Starck
- Department of Cardiothoracic and Vascular Surgery, German Heart Institute Berlin, Berlin, Germany
| | - Georgios Stefopoulos
- Laboratory of Thermodynamics in Emerging Technologies, Department of Mechanical and Process Engineering, ETH Zurich, Sonneggstrasse 3, 8092, Zurich, Switzerland
| | - Simon Sündermann
- Department of Cardiothoracic and Vascular Surgery, German Heart Institute Berlin, Berlin, Germany.,Department of Cardiovascular Surgery, Charité - Universitätsmedizin Berlin, Berlin, Germany.,Deutsches Zentrum für Herz-Kreislaufforschung, Standort Berlin, Germany
| | - Bente Thamsen
- Product Development Group Zurich, Department of Mechanical and Process Engineering, ETH Zurich, Zurich, Switzerland
| | - Peter Zilla
- Christiaan Barnard Division of Cardiothoracic Surgery, University of Cape Town, Cape Town, South Africa
| | - Evgenij Potapov
- Department of Cardiothoracic and Vascular Surgery, German Heart Institute Berlin, Berlin, Germany.,Department of Cardiovascular Surgery, Charité - Universitätsmedizin Berlin, Berlin, Germany.,Deutsches Zentrum für Herz-Kreislaufforschung, Standort Berlin, Germany.,Translational Cardiovascular Technologies, Institute of Translational Medicine, Department of Health Sciences and Technology, Swiss Federal Institute of Technology (ETH), Zurich, Switzerland
| | - Volkmar Falk
- Department of Cardiothoracic and Vascular Surgery, German Heart Institute Berlin, Berlin, Germany. .,Department of Cardiovascular Surgery, Charité - Universitätsmedizin Berlin, Berlin, Germany. .,Deutsches Zentrum für Herz-Kreislaufforschung, Standort Berlin, Germany. .,Translational Cardiovascular Technologies, Institute of Translational Medicine, Department of Health Sciences and Technology, Swiss Federal Institute of Technology (ETH), Zurich, Switzerland.
| | - Edoardo Mazza
- EMPA, Swiss Federal Laboratories for Material Science and Technologies, Überlandstrasse 129, 8600, Dübendorf, Switzerland. .,Institute for Mechanical Systems, ETH Zurich, 8092, Zurich, Switzerland.
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14
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Review and reflections about pulsatile ventricular assist devices from history to future: concerning safety and low haemolysis-still needed. J Artif Organs 2020; 23:303-314. [PMID: 32367384 PMCID: PMC7666270 DOI: 10.1007/s10047-020-01170-3] [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: 01/20/2020] [Accepted: 04/13/2020] [Indexed: 11/23/2022]
Abstract
Since the first use of a ventricular assist device in 1963 many extracorporeal and implantable pulsatile blood pumps have been developed. After the invention of continuous flow blood pumps the implantable pulsatile pumps are not available anymore. The new rotary pumps spend a better quality of life because many of the patients can go home. Nevertheless, the extracorporeal pulsatile pumps have some advantages. They are low-cost systems, produce less haemolysis and heart-recovery can be tested easily. Pump failure is easy to realize because the pumps can be observed visually. Pump exchange can be done easily without any chirurgic surgery. As volume displacement pumps they can produce high blood pressure, so they are the only ones suitable for pediatric patients. Therefore, they are indispensable for clinical use today and in the future. In this work, nearly all pulsatile blood pumps used in clinical life are described.
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15
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Miniaturized Test Loop for the Assessment of Blood Damage by Continuous-Flow Left-Ventricular Assist Devices. Ann Biomed Eng 2019; 48:768-779. [PMID: 31724071 DOI: 10.1007/s10439-019-02404-z] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/02/2019] [Accepted: 11/06/2019] [Indexed: 01/22/2023]
Abstract
Although the hemocompatibility of left-ventricular assist devices (LVADs) has continuously improved, assessment of hemolysis remains mandatory in pre-clinical testing. The ASTM-F1841 has standardized this assessment since 1997. However, the recommended usage of fresh, non-pooled human blood is hardly feasible with the test loop volume specified therein, when testing the device under test versus a predicate device as required by the international standard 10993-4. In this study, we compared ASTM-conforming (ASTM) and downscaled (mini) test loops with a one-third priming volume for the assessment of blood damage at the ASTM operating point. Blood damage was assessed for HeartMate 3 and BPX-80 in 6 experiments with heparinized porcine slaughterhouse blood for 6 h. We analyzed plasma free hemoglobin (pfHb), von Willebrand factor (vWF) concentration and collagen-binding functionality and calculated indices of hemolysis and vWF-ratios. The mini test loops provided significantly higher pfHb increase and consistently stronger vWF-ratio decrease and yielded a significantly better differentiation of the pumps. Interestingly, indices of hemolysis were generally lower in the mini set-up, indicating less adverse effects by the mini loop itself. Thus, we propose our mini test loop as suitable tool for clinically relevant standardized assessment of blood damage by future LVADs with single-donation human blood.
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16
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Malchesky PS. Artificial Organs 2018: A Year in Review. Artif Organs 2019; 43:288-317. [PMID: 30680758 DOI: 10.1111/aor.13428] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/22/2019] [Accepted: 01/22/2019] [Indexed: 12/24/2022]
Abstract
In this Editor's Review, articles published in 2018 are organized by category and summarized. We provide a brief reflection of the research and progress in artificial organs intended to advance and better human life while providing insight for continued application of these technologies and methods. Artificial Organs continues in the original mission of its founders "to foster communications in the field of artificial organs on an international level." Artificial Organs continues to publish developments and clinical applications of artificial organ technologies in this broad and expanding field of organ Replacement, Recovery, and Regeneration from all over the world. Peer-reviewed special issues this year included contributions from the 13th International Conference on Pediatric Mechanical Circulatory Support Systems and Pediatric Cardiopulmonary Perfusion edited by Dr. Akif Undar, and the 25th Congress of the International Society for Mechanical Circulatory Support edited by Dr. Marvin Slepian. Additionally, many editorials highlighted the worldwide survival differences in hemodialysis and perspectives on mechanical circulatory support and stem cell therapies for cardiac support. We take this time also to express our gratitude to our authors for offering their work to this journal. We offer our very special thanks to our reviewers who give so generously of time and expertise to review, critique, and especially provide meaningful suggestions to the author's work whether eventually accepted or rejected. Without these excellent and dedicated reviewers the quality expected from such a journal could not be possible. We also express our special thanks to our Publisher, John Wiley & Sons for their expert attention and support in the production and marketing of Artificial Organs. We look forward to reporting further advances in the coming years.
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