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Journal of Artificial Organs: the Official Journal of the Japanese Society for Artificial Organs

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https://www.readbyqxmd.com/read/28444563/889%C3%A2-days-of-support-on-hydrodynamic-bearing-rotation-mode-of-the-duraheart%C3%A2-for-bridge-to-heart-transplantation
#1
Yorihiko Matsumoto, Tomoyuki Fujita, Satsuki Fukushima, Hiroki Hata, Yusuke Shimahara, Yuta Kume, Kizuku Yamashita, Kensuke Kuroda, Seiko Nakajima, Haruki Sunami, Takuma Sato, Osamu Seguchi, Masanobu Yanase, Norihide Fukushima, Junjiro Kobayashi
A 49-year-old man with ischemic cardiomyopathy and tricuspid regurgitation underwent a DuraHeart implantation and tricuspid annuloplasty for bridge-to-heart transplantation. On postoperative day 393, the magnetic levitation system suddenly broke down, and the pump system went into hydrodynamic bearing rotation (HD) mode without causing relevant symptoms. The controller was exchanged with one that adapted to the HD mode. No significant hemodynamic changes or indications of hemolysis were observed. On postoperative day 982, the pump temporarily stopped nine times...
April 25, 2017: Journal of Artificial Organs: the Official Journal of the Japanese Society for Artificial Organs
https://www.readbyqxmd.com/read/28429120/the-influence-of-pump-rotation-speed-on-hemodynamics-and-myocardial-oxygen-metabolism-in-left-ventricular-assist-device-support-with-aortic-valve-regurgitation
#2
Kei Iizuka, Tomohiro Nishinaka, Yoshiaki Takewa, Kenji Yamazaki, Eisuke Tatsumi
Aortic valve regurgitation (AR) is a serious complication under left ventricular assist device (LVAD) support. AR causes LVAD-left ventricular (LV) recirculation, which makes it difficult to continue LVAD support. However, the hemodynamics and myocardial oxygen metabolism of LVAD support with AR have not been clarified, especially, how pump rotation speed influences them. An animal model of LVAD with AR was newly developed, and how pump rotation speed influences hemodynamics and myocardial oxygen metabolism was examined in acute animal experiments...
April 20, 2017: Journal of Artificial Organs: the Official Journal of the Japanese Society for Artificial Organs
https://www.readbyqxmd.com/read/28424885/bedside-repositioning-of-a-dislocated-avalon-cannula-in-a-running-veno-venous-ecmo
#3
Johannes Kalbhenn, Sven Maier, Sebastian Heinrich, Nils Schallner
We report a repositioning maneuver of a dislocated Avalon Elite dual lumen catheter during ongoing veno-venous ECMO support. The inferior tip of the catheter dislocated into a liver vein, which was accompanied by a dramatic decrease in pump flow. After standard repositioning maneuvers under transthoracic echocardiographic guidance had failed, a special guiding sheath was inserted into the main lumen through a Y-connector with a valve. Over this valve, a stiff wire could be placed into the inferior vena cava to help guiding the catheter back into the correct position...
April 19, 2017: Journal of Artificial Organs: the Official Journal of the Japanese Society for Artificial Organs
https://www.readbyqxmd.com/read/28424884/principle-and-basic-property-of-the-sequential-flow-pump
#4
Shintaro Hara, Erina Maeno, Xinyang Li, Terumi Yurimoto, Takashi Isoyama, Itsuro Saito, Toshiya Ono, Yusuke Abe
In the emergency care field, early treatment of acute heart or respiratory failure has been a global concern. In severe cases, patients are frequently required to be on an extracorporeal membrane oxygenator (ECMO) life support. To make the ECMO system more compact and portable, we proposed a sequential flow-type centrifugal pump named the sequential flow pump (SFP). In this study, principle and basic properties of this novel blood pump were examined by computational fluid dynamic (CFD) analysis and an experimental model...
April 19, 2017: Journal of Artificial Organs: the Official Journal of the Japanese Society for Artificial Organs
https://www.readbyqxmd.com/read/28391521/generating-pulsatility-by-pump-speed-modulation-with-continuous-flow-total-artificial-heart-in-awake-calves
#5
Kiyotaka Fukamachi, Jamshid H Karimov, Gengo Sunagawa, David J Horvath, Nicole Byram, Barry D Kuban, Raymond Dessoffy, Shiva Sale, Leonard A R Golding, Nader Moazami
The purpose of this study was to evaluate the effects of sinusoidal pump speed modulation of the Cleveland Clinic continuous-flow total artificial heart (CFTAH) on hemodynamics and pump flow in an awake chronic calf model. The sinusoidal pump speed modulations, performed on the day of elective sacrifice, were set at ±15 and ± 25% of mean pump speed at 80 bpm in four awake calves with a CFTAH. The systemic and pulmonary arterial pulse pressures increased to 12.0 and 12.3 mmHg (±15% modulation) and to 15...
April 8, 2017: Journal of Artificial Organs: the Official Journal of the Japanese Society for Artificial Organs
https://www.readbyqxmd.com/read/28382424/plasma-exchange-for-the-patients-with-dilated-cardiomyopathy-in-children-is-safe-and-effective-in-improving-both-cardiac-function-and-daily-activities
#6
Takeshi Moriguchi, Keiichi Koizumi, Kenichi Matsuda, Norikazu Harii, Junko Goto, Daiki Harada, Hisanori Sugawara, Minako Hoshiai, Hiroaki Kise, Akiyasu Baba
Autoantibodies against cardiac proteins play an important role in the development of dilated cardiomyopathy (DCM). The efficacy and safety of apheresis such as immunoadsorption (IA) or plasma exchange (PE) to remove such antibodies have been reported in adult DCM patients. However, apheresis for pediatric DCM has not been performed because of technical difficulty due to relatively low blood volume and instability of hemodynamics. As we have experiences of preforming apheresis on hemodynamically unstable children, we have preformed ten courses of PE on seven child DCM patients including both patients in chronic and acute phase to assess the safety and efficacy to PE...
April 5, 2017: Journal of Artificial Organs: the Official Journal of the Japanese Society for Artificial Organs
https://www.readbyqxmd.com/read/28361206/three-dimensional-replica-of-corrected-transposition-of-the-great-arteries-for-successful-heart-transplantation
#7
Tomoyuki Fujita, Satsuki Fukushima, Norihide Fukushima, Isao Shiraishi, Junjiro Kobayashi
A 59-year-old man who had been previously diagnosed with congenitally corrected transposition of the great arteries at the age of 35 years became a candidate for heart transplantation. At the age of 57 years, he was referred to our hospital and underwent implantation of a left ventricular assist device (EVAHEART; Sun Medical Technology Research Corp., Suwa City, Japan) because of worsening ventricular function and was listed as a heart transplant candidate. A donor appeared when the patient was 59 years. A three-dimensional replica was made using data from computed tomography angiography...
March 30, 2017: Journal of Artificial Organs: the Official Journal of the Japanese Society for Artificial Organs
https://www.readbyqxmd.com/read/28357590/non-machinery-dialysis-that-achieves-blood-purification-therapy-without-using-full-scale-dialysis-machines
#8
Takaya Abe, Mistutaka Onoda, Tomohiko Matsuura, Jun Sugimura, Wataru Obara, Toshiya Sato, Mihoko Takahashi, Kenta Chiba, Tomiya Abe
An electrical or water supply and a blood purification machine are required for renal replacement therapy. There is a possibility that acute kidney injury can occur in large numbers and on a wide scale in the case of a massive earthquake, and there is the potential risk that the current supply will be unable to cope with acute kidney injury cases. However, non-machinery dialysis requires exclusive circuits and has the characteristic of not requiring the full-scale dialysis machines. We performed perfusion experiments that used non-machinery dialysis and recent blood purification machines in 30-min intervals, and the effectiveness of non-machinery dialysis was evaluated by the assessing the removal efficiency of potassium, which causes lethal arrhythmia during acute kidney injury...
March 29, 2017: Journal of Artificial Organs: the Official Journal of the Japanese Society for Artificial Organs
https://www.readbyqxmd.com/read/28349222/anticoagulation-therapy-for-a-lvad-patient-with-acquired-warfarin-resistance
#9
Daisuke Yoshioka, Koichi Toda, Takayuki Hidaka, Soichiro Yasuda, Shunsuke Saito, Keitaro Domae, Yoshiki Sawa
Anticoagulation therapy with warfarin is essential for postoperative management in patients with left ventricular assist device (LVAD). In this manuscript, we report the case of a patient who developed warfarin resistance after LVAD implantation. Although we administered a novel anticoagulant drug in addition to warfarin and aspirin therapy, the patient developed a major stroke. The patient needed continuous intravenous heparinization until heart transplantation for approximately 2 years. Meticulous management of anticoagulation therapy is essential for a LVAD with warfarin resistance...
March 27, 2017: Journal of Artificial Organs: the Official Journal of the Japanese Society for Artificial Organs
https://www.readbyqxmd.com/read/28349221/total-artificial-heart-implantation-for-biventricular-failure-due-to-eosinophilic-myocarditis
#10
Masashi Kawabori, Chitaru Kurihara, Yair Miller, Kent A Heck, Roberta C Bogaev, Andrew B Civitello, William E Cohn, O H Frazier, Jeffrey A Morgan
Idiopathic hypereosinophilic syndrome is a condition of unknown etiology characterized by proliferation of eosinophils and their infiltration into tissues. Although cardiac involvement is rare, eosinophilic myocarditis can lead to life-threating fulminant congestive heart failure. Treatment of patients with eosinophilic myocarditis is challenging as heart failure can be caused by biventricular dysfunction. To our knowledge, this is the first case reported in the literature describing a patient with acute severe biventricular heart failure caused by eosinophilic myocarditis with mural left ventricular apical thrombus who was successfully treated with implantation of a total artificial heart as a bridge to heart transplant...
March 27, 2017: Journal of Artificial Organs: the Official Journal of the Japanese Society for Artificial Organs
https://www.readbyqxmd.com/read/28341867/a-safe-procedure-for-connecting-a-continuous-renal-replacement-therapy-device-into-an-extracorporeal-membrane-oxygenation-circuit
#11
Natsumi Suga, Yosuke Matsumura, Ryuzo Abe, Noriyuki Hattori, Taka-Aki Nakada, Shigeto Oda
Patients receiving extracorporeal membrane oxygenation (ECMO) often require continuous renal replacement therapy (CRRT). The intra-circuit pressure of adult ECMO usually deviates from the physiological range. We investigated the use of CRRT connected to an ECMO circuit with physiological intra-circuit pressures (0-150 mmHg, defined as the "safety range") using an in vitro experiment involving a water-filled ECMO circuit. The intra-circuit pressure pre-pump, post-pump, and post-oxygenator were measured while varying the height of the pump or ECMO flow...
March 24, 2017: Journal of Artificial Organs: the Official Journal of the Japanese Society for Artificial Organs
https://www.readbyqxmd.com/read/28286902/catch-22-a-case-of-incessant-ventricular-tachycardia-post-left-ventricular-assist-device-resulting-in-right-ventricular-failure-left-ventricular-cavity-obliteration-and-failure-of-endocardial-ventricular-tachycardia-ablation
#12
Amit J Thosani, Stephen H Bailey, Amresh Raina
Ventricular tachycardia (VT) in the setting of left ventricular assist device (LVAD) therapy has been well described. We present a case of incessant ventricular tachycardia resulting in severe right ventricular (RV) failure and subsequent left ventricular (LV) cavity obliteration, which in turn diminished the feasibility of initial attempt at VT ablation.
March 12, 2017: Journal of Artificial Organs: the Official Journal of the Japanese Society for Artificial Organs
https://www.readbyqxmd.com/read/28251431/48%C3%A2-h-cessation-of-mechanical-ventilation-during-venovenous-extracorporeal-membrane-oxygenation-in-severe-trauma-a-case-report
#13
Justyna Swol, Yann Fülling, Christopher Ull, Matthias Bechtel, Thomas A Schildhauer
A 32-year-old motorcyclist who was hit by a tram subsequently presented with blunt force thoracic trauma, a pelvic fracture and a penetrating injury to the left lower extremity. Coagulopathy persisted following surgery of the leg and pelvic vascular intervention. Bedside thoracotomy was performed to treat pneumothorax and pneumopericardium. Severe hypoxemia secondary to lung failure ensued, which required venovenous extracorporeal membrane oxygenation (VV ECMO) support. On the third day after the trauma, ultra-protective mechanical ventilation was not possible due to non-existent lung compliance; thus, the ventilator was disconnected, and the T-piece was connected to the blocked tracheal tube left in the airway...
March 1, 2017: Journal of Artificial Organs: the Official Journal of the Japanese Society for Artificial Organs
https://www.readbyqxmd.com/read/28243756/improvement-of-activities-of-daily-living-after-total-hip-arthroplasty-using-a-computed-tomography-based-navigation-system
#14
Yuki Maeda, Nobuo Nakamura, Nobuhiko Sugano
The purpose of this study was to evaluate the outcome improvements after total hip arthroplasty (THA) using the Western Ontario and McMaster Universities Osteoarthritis Index (WOMAC) in patients who underwent THA with a navigation system in our institutions. The subjects were 219 patients. All patients had adequate data to allow complete scoring of the WOMAC for a 1-year postoperative follow-up. CT-based navigation was used in all THAs. Postoperatively, no restrictions were imposed on patients' ADL. One year after surgery, the average WOMAC pain subscale score was 1...
February 27, 2017: Journal of Artificial Organs: the Official Journal of the Japanese Society for Artificial Organs
https://www.readbyqxmd.com/read/28239740/papillary-muscle-rupture-after-myocardial-infarction-during-left-ventricular-assist-device-support
#15
Shingo Kunioka, Hiroto Kitahara, Hirotsugu Kanda, Tomohiro Takeda, Yuri Yoshida, Natsuya Ishikawa, Hiroyuki Kamiya
We report a rare case of papillary muscle rupture due to myocardial infarction during left ventricular assist device support. A 69-year-old woman with cardiogenic shock due to acute myocardial infarction requiring venoarterial extracorporeal membrane oxygenation support was transferred for further surgical intervention. Six days after the event, extracorporeal membrane oxygenation was decannulated, and an extracorporeal left ventricular assist device was implanted. On postoperative day 11, she suffered from sudden onset hypoxia due to pulmonary edema...
February 26, 2017: Journal of Artificial Organs: the Official Journal of the Japanese Society for Artificial Organs
https://www.readbyqxmd.com/read/28238150/moderate-hypothermia-technique-for-chronic-implantation-of-a-total-artificial-heart-in-calves
#16
Jamshid H Karimov, Patrick Grady, Martin Sinkewich, Gengo Sunagawa, Raymond Dessoffy, Nicole Byram, Nader Moazami, Kiyotaka Fukamachi
The benefit of whole-body hypothermia in preventing ischemic injury during cardiac surgical operations is well documented. However, application of hypothermia during in vivo total artificial heart implantation has not become widespread because of limited understanding of the proper techniques and restrictions implied by constitutional and physiological characteristics specific to each animal model. Similarly, the literature on hypothermic set-up in total artificial heart implantation has also been limited. Herein we present our experience using hypothermia in bovine models implanted with the Cleveland Clinic continuous-flow total artificial heart...
February 25, 2017: Journal of Artificial Organs: the Official Journal of the Japanese Society for Artificial Organs
https://www.readbyqxmd.com/read/28181076/visual-evoked-potential-in-rcs-rats-with-okayama-university-type-retinal-prosthesis-ourep%C3%A2-implantation
#17
Alamusi, Toshihiko Matsuo, Osamu Hosoya, Tetsuya Uchida
Photoelectric dye-coupled polyethylene film, designated Okayama University type-retinal prosthesis or OUReP™, generates light-evoked surface electric potentials and stimulates neurons. The dye-coupled films or plain films were implanted subretinally in both eyes of 10 Royal College of Surgeons rats with hereditary retinal dystrophy at the age of 6 weeks. Visual evoked potentials in response to monocular flashing light stimuli were recorded from cranially-fixed electrodes, 4 weeks and 8 weeks after the implantation...
February 8, 2017: Journal of Artificial Organs: the Official Journal of the Japanese Society for Artificial Organs
https://www.readbyqxmd.com/read/28161817/curative-surgery-for-gastric-cancer-in-a-patient-with-an-implantable-left-ventricular-assist-device
#18
Yuki Nakamura, Koichi Toda, Teruya Nakamura, Shigeru Miyagawa, Yasushi Yoshikawa, Satsuki Fukushima, Shunsuke Saito, Daisuke Yoshioka, Keitaro Domae, Tsuyoshi Takahashi, Tadayoshi Hashimoto, Yuichiro Doki, Yoshiki Sawa
The number of patients with end-stage heart failure treated by a left ventricular assist device (LVAD) is dramatically increasing, because the LVAD has been widely accepted for its clinical results. According to the initiation of destination therapy, the prevalence of malignancy in patients with an LVAD is estimated to increase. In patients with LVADs, abdominal surgery for visceral malignancy is associated with technical difficulties because of the presence of an LVAD pump or the driveline which is located transversely in the preperitoneal space...
February 4, 2017: Journal of Artificial Organs: the Official Journal of the Japanese Society for Artificial Organs
https://www.readbyqxmd.com/read/28197736/journal-of-artificial-organs-2016-the-year-in-review-journal-of-artificial-organs-editorial-committee
#19
REVIEW
Y Sawa, G Matsumiya, K Matsuda, E Tatsumi, T Abe, K Fukunaga, S Ichiba, A Kishida, K Kokubo, T Masuzawa, A Myoui, M Nishimura, T Nishimura, T Nishinaka, E Okamoto, S Tokunaga, T Tomo, T Tsukiya, Y Yagi, T Yamaoka
No abstract text is available yet for this article.
March 2017: Journal of Artificial Organs: the Official Journal of the Japanese Society for Artificial Organs
https://www.readbyqxmd.com/read/27709306/axillo-iliac-arteriovenous-hemodialysis-graft-creation-with-an-early-cannulation-device
#20
Carlos A Hinojosa, Javier E Anaya-Ayala, Alejandra Lopez-Mendez, Zeniff Gomez-Arcive, Hugo Laparra-Escareno, Cesar Cuen-Ojeda, Rene Lizola, Adriana Torres-Machorro
Exhaustion of superficial veins coupled with the presence of intrathoracic central venous occlusions remains a significant obstacle for hemodialysis access creation; complex arteriovenous graft (AVG) configurations have been described. The axillary-iliac AVG was first reported in 1987, and few authors have explored this access. We evaluated our experience with this AVG configuration utilizing the early cannulation (EC) graft Flixene™ (Atrium ™, Hudson, NH, USA). Eight patients (75 % men; mean age 37 ± 10 years) with End-Stage Renal Disease (ESRD) underwent axillo-iliac AVG creation with Flixene™ grafts; all had exhausted peripheral veins, occluded thoracic central veins, and inadequate femoral veins...
March 2017: Journal of Artificial Organs: the Official Journal of the Japanese Society for Artificial Organs
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