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Sakurai H, Fujiwara T, Ohuchi K, Hijikata W, Inoue Y, Maruyama O, Tahara T, Yokota S, Tanaka Y, Takewa Y, Mizuno T, Arai H. Innovative experimental animal models for real-time comparison of antithrombogenicity between two oxygenators using dual extracorporeal circulation circuits and indocyanine green fluorescence imaging. Artif Organs 2023; 47:77-87. [PMID: 35957489 DOI: 10.1111/aor.14380] [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: 05/13/2022] [Revised: 07/08/2022] [Accepted: 08/02/2022] [Indexed: 01/04/2023]
Abstract
BACKGROUND Antithrombogenicity of extracorporeal membrane oxygenation (ECMO) devices, particularly oxygenators, is a current problem, with numerous studies and developments underway. However, there has been limited progress in developing methods to accurately compare the antithrombogenicity of oxygenators. Animal experiments are commonly conducted to evaluate the antithrombogenicity of devices; however, it is challenging to maintain a steady experimental environment. We propose an innovative experimental animal model to evaluate different devices in a constant experimental environment in real-time. METHODS This model uses two venous-arterial ECMO circuits attached to one animal (one by jugular vein and carotid artery, one by femoral vein and artery) and real-time assessment of thrombus formation in the oxygenator by indocyanine green (ICG) fluorescence imaging. Comparison studies were conducted using three pigs: one to compare different oxygenators (MERA vs. CAPIOX) (Case 1), and two to compare antithrombotic properties of the oxygenator (QUADROX) when used under different hydrodynamic conditions (continuous flow vs. pulsatile flow) (Cases 2 and 3). RESULTS Thrombi, visualized using ICG imaging, appeared as black dots on a white background in each oxygenator. In Case 1, differences in the site of thrombus formation and rate of thrombus growth were observed in real-time in two oxygenators. In Case 2 and 3, the thrombus region was smaller in pulsatile than in continuous conditions. CONCLUSIONS We devised an innovative experimental animal model for comparison of antithrombogenicity in ECMO circuits. This model enabled simultaneous evaluation of two different ECMO circuits under the same biological conditions and reduced the number of sacrificed experimental animals.
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Affiliation(s)
- Hironobu Sakurai
- Department of Cardiovascular Surgery, Graduate School of Medical and Dental Sciences, Tokyo Medical and Dental University, Tokyo, Japan
| | - Tatsuki Fujiwara
- Department of Cardiovascular Surgery, Graduate School of Medical and Dental Sciences, Tokyo Medical and Dental University, Tokyo, Japan
| | - Katsuhiro Ohuchi
- Center for Experimental Animals, Tokyo Medical and Dental University, Tokyo, Japan
| | - Wataru Hijikata
- School of Engineering, Tokyo Institute of Technology, Tokyo, Japan
| | - Yusuke Inoue
- Advanced Medical Engineering Research Center, Asahikawa Medical University, Asahikawa, Japan
| | - Osamu Maruyama
- Health and Medical Research Institute, National Institute of Advanced Industrial Science and Technology (AIST), Tsukuba, Japan
| | - Tomoki Tahara
- Department of Cardiovascular Surgery, Graduate School of Medical and Dental Sciences, Tokyo Medical and Dental University, Tokyo, Japan
| | - Sachie Yokota
- Faculty of Medicine, Tokyo Medical and Dental University, Tokyo, Japan
| | - Yui Tanaka
- School of Engineering, Tokyo Institute of Technology, Tokyo, Japan
| | - Yoshiaki Takewa
- Advanced Medical Engineering Research Center, Asahikawa Medical University, Asahikawa, Japan
| | - Tomohiro Mizuno
- Department of Cardiovascular Surgery, Graduate School of Medical and Dental Sciences, Tokyo Medical and Dental University, Tokyo, Japan
| | - Hirokuni Arai
- Department of Cardiovascular Surgery, Graduate School of Medical and Dental Sciences, Tokyo Medical and Dental University, Tokyo, Japan
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Wisniewski A, Medart D, Wurm FH, Torner B. Evaluation of clinically relevant operating conditions for left ventricular assist device investigations. Int J Artif Organs 2020; 44:92-100. [PMID: 32605416 DOI: 10.1177/0391398820932925] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
Abstract
Standardized boundary conditions for flow rate and pressure difference are currently not available for the development and certification process of ventricular assist devices. Thus, interdisciplinary studies lack comparability and quantitative assessment. Universally valid boundary conditions could be used for the application of numerical and experimental investigations and the approval procedure of ventricular assist devices. In order to define such boundaries, physiological data from INCOR® patients were evaluated. A total of 599 out of possible 627 ventricular assist device patients were analyzed regarding their cardiac demands of flow rate and pressure head. An analysis of long-term data was performed, in order to provide respective, static mean values for benchmark testing. Furthermore, the short-term data of 188 patients delivered field data-based dynamic flow and pressure curves. The results of the study revealed physiologically reasonable boundary conditions, which can be applied in numerical or experimental investigations of ventricular assist devices. For steady flow analysis, single values for flow rate (4.46 L/min) and pressure head (62 mmHg) are suggested. For the support of pulsatile and unsteady flow studies, seven typical patients and one representative dynamic curve for flow rate and pressure head are proposed.The standardized results provided in this article, can be used in favor of interdisciplinary comparability of future numerical computations or in vitro ventricular assist device tests in research, development, and approval.
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Affiliation(s)
- A Wisniewski
- Berlin Heart GmbH, Berlin, Germany.,Universität Rostock, Fakultät für Maschinenbau und Schiffstechnik, Rostock, Germany
| | - D Medart
- Berlin Heart GmbH, Berlin, Germany
| | - F-H Wurm
- Universität Rostock, Fakultät für Maschinenbau und Schiffstechnik, Rostock, Germany
| | - B Torner
- Universität Rostock, Fakultät für Maschinenbau und Schiffstechnik, Rostock, Germany
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Sakota D, Fujiwara T, Ohuchi K, Kuwana K, Yamazaki H, Kosaka R, Nishida M, Mizuno T, Arai H, Maruyama O. Development of a real-time and quantitative thrombus sensor for an extracorporeal centrifugal blood pump by near-infrared light. BIOMEDICAL OPTICS EXPRESS 2018; 9:190-201. [PMID: 29359096 PMCID: PMC5772574 DOI: 10.1364/boe.9.000190] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/15/2017] [Revised: 11/07/2017] [Accepted: 12/07/2017] [Indexed: 06/07/2023]
Abstract
We developed an optical thrombus sensor for a monopivot extracorporeal centrifugal blood pump. In this study, we investigated its quantitative performance for thrombus detection in acute animal experiments of left ventricular assist using the pump on pathogen-free pigs. Optical fibers were set in the driver unit of the pump. The incident light at the near-infrared wavelength of 810 nm was aimed at the pivot bearing, and the resulting scattered light was guided to the optical fibers. The detected signal was analyzed to obtain the thrombus formation level. As a result, real-time and quantitative monitoring of the thrombus surface area on the pivot bearing was achieved with an accuracy of 3.6 ± 2.3 mm2. In addition, the sensing method using the near-infrared light was not influenced by changes in the oxygen saturation and the hematocrit. It is expected that the developed sensor will be useful for optimal anticoagulation management for long-term extracorporeal circulation therapies.
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Affiliation(s)
- Daisuke Sakota
- Health Research Institute, National Institute of Advanced Industrial Science and Technology (AIST), 1-2-1 Namiki, Tsukuba-shi, Ibaraki 305-8564, Japan
| | - Tatsuki Fujiwara
- Department of Cardiovascular Surgery, Tokyo Medical and Dental University Graduate School of Medical and Dental Sciences, 1-5-45 Yushima, Bunkyo-ku, Tokyo 113-8519, Japan
| | - Katsuhiro Ohuchi
- Department of Advanced Surgical Technology Research and Development, Tokyo Medical and Dental University, 1-5-45 Yushima, Bunkyo-ku, Tokyo 113-8519, Japan
| | - Katsuyuki Kuwana
- Senko Medical Instrument Mfg. Co., Ltd., 3-23-13 Hongo, Bunkyo-ku, Tokyo 113-0033, Japan
| | - Hiroyuki Yamazaki
- Optquest Co., Ltd., 1335 Haraichi, Ageo-shi, Saitama 362-0021, Japan
| | - Ryo Kosaka
- Health Research Institute, National Institute of Advanced Industrial Science and Technology (AIST), 1-2-1 Namiki, Tsukuba-shi, Ibaraki 305-8564, Japan
| | - Masahiro Nishida
- Health Research Institute, National Institute of Advanced Industrial Science and Technology (AIST), 1-2-1 Namiki, Tsukuba-shi, Ibaraki 305-8564, Japan
| | - Tomohiro Mizuno
- Department of Cardiovascular Surgery, Tokyo Medical and Dental University Graduate School of Medical and Dental Sciences, 1-5-45 Yushima, Bunkyo-ku, Tokyo 113-8519, Japan
- Department of Advanced Surgical Technology Research and Development, Tokyo Medical and Dental University, 1-5-45 Yushima, Bunkyo-ku, Tokyo 113-8519, Japan
| | - Hirokuni Arai
- Department of Cardiovascular Surgery, Tokyo Medical and Dental University Graduate School of Medical and Dental Sciences, 1-5-45 Yushima, Bunkyo-ku, Tokyo 113-8519, Japan
| | - Osamu Maruyama
- Health Research Institute, National Institute of Advanced Industrial Science and Technology (AIST), 1-2-1 Namiki, Tsukuba-shi, Ibaraki 305-8564, Japan
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Fujiwara T, Sakota D, Ohuchi K, Endo S, Tahara T, Murashige T, Kosaka R, Oi K, Mizuno T, Maruyama O, Arai H. Optical Dynamic Analysis of Thrombus Inside a Centrifugal Blood Pump During Extracorporeal Mechanical Circulatory Support in a Porcine Model. Artif Organs 2017; 41:893-903. [DOI: 10.1111/aor.12862] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/18/2016] [Revised: 07/07/2016] [Accepted: 08/19/2016] [Indexed: 12/25/2022]
Affiliation(s)
- Tatsuki Fujiwara
- Department of Cardiovascular Surgery; Tokyo Medical and Dental University Graduate School of Medical and Dental Sciences
| | - Daisuke Sakota
- Health Research Institute, National Institute of Advanced Industrial Science and Technology (AIST)
| | - Katsuhiro Ohuchi
- Department of Advanced Surgical Technology Research and Development; Tokyo Medical and Dental University
| | - Shu Endo
- Center for Experimental Animals, Tokyo Medical and Dental University
| | - Tomoki Tahara
- Faculty of Medicine; Tokyo Medical and Dental University
| | - Tomotaka Murashige
- Graduate School of Science and Technology; Tokyo University of Science; Ibaraki Japan
| | - Ryo Kosaka
- Health Research Institute, National Institute of Advanced Industrial Science and Technology (AIST)
| | - Keiji Oi
- Department of Cardiovascular Surgery; Tokyo Medical and Dental University Graduate School of Medical and Dental Sciences
| | - Tomohiro Mizuno
- Department of Cardiovascular Surgery; Tokyo Medical and Dental University Graduate School of Medical and Dental Sciences
| | - Osamu Maruyama
- Health Research Institute, National Institute of Advanced Industrial Science and Technology (AIST)
| | - Hirokuni Arai
- Department of Cardiovascular Surgery; Tokyo Medical and Dental University Graduate School of Medical and Dental Sciences
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Nishida M, Negishi T, Sakota D, Kosaka R, Maruyama O, Hyakutake T, Kuwana K, Yamane T. Properties of a monopivot centrifugal blood pump manufactured by 3D printing. J Artif Organs 2016; 19:322-329. [DOI: 10.1007/s10047-016-0914-9] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/19/2016] [Accepted: 06/21/2016] [Indexed: 11/30/2022]
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Nishida M, Nakayama K, Sakota D, Kosaka R, Maruyama O, Kawaguchi Y, Kuwana K, Yamane T. Effect of Impeller Geometry on Lift-Off Characteristics and Rotational Attitude in a Monopivot Centrifugal Blood Pump. Artif Organs 2016; 40:E89-E101. [DOI: 10.1111/aor.12697] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/08/2015] [Revised: 11/12/2015] [Accepted: 12/21/2015] [Indexed: 11/29/2022]
Affiliation(s)
- Masahiro Nishida
- Health Research Institute, National Institute of Advanced Industrial Science and Technology; Tsukuba, Ibaraki
| | - Kento Nakayama
- Graduate School of Science and Technology, Tokyo University of Science; Noda, Chiba
| | - Daisuke Sakota
- Health Research Institute, National Institute of Advanced Industrial Science and Technology; Tsukuba, Ibaraki
| | - Ryo Kosaka
- Health Research Institute, National Institute of Advanced Industrial Science and Technology; Tsukuba, Ibaraki
| | - Osamu Maruyama
- Health Research Institute, National Institute of Advanced Industrial Science and Technology; Tsukuba, Ibaraki
| | - Yasuo Kawaguchi
- Graduate School of Science and Technology, Tokyo University of Science; Noda, Chiba
| | | | - Takashi Yamane
- Graduate School of Engineering, Kobe University; Kobe, Hyogo, Japan
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Abstract
In this Editor's Review, articles published in 2013 are organized by category and briefly summarized. We aim to provide a brief reflection of the currently available worldwide knowledge that is intended to advance and better human life while providing insight for continued application of technologies and methods of organ Replacement, Recovery, and Regeneration. As the official journal of The International Federation for Artificial Organs, The International Faculty for Artificial Organs, the International Society for Rotary Blood Pumps, the International Society for Pediatric Mechanical Cardiopulmonary Support, and the Vienna International Workshop on Functional Electrical Stimulation, 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. 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 so meaningful suggestions to the author's work whether eventually accepted or rejected and especially to those whose native tongue is not English. 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, Wiley Periodicals, for their expert attention and support in the production and marketing of Artificial Organs. We look forward to recording further advances in the coming years.
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Inoue T, Kitamura T, Torii S, Hanayama N, Oka N, Itatani K, Tomoyasu T, Irisawa Y, Shibata M, Hayashi H, Ono M, Miyaji K. Five-week use of a monopivot centrifugal blood pump as a right ventricular assist device in severe dilated cardiomyopathy. J Artif Organs 2013; 17:95-8. [DOI: 10.1007/s10047-013-0740-2] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/14/2013] [Accepted: 10/27/2013] [Indexed: 11/24/2022]
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