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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/28685358/asymmetric-triacetate-membrane-keeps-high-water-flux-during-ultrafiltration-in-vitro-study
#1
Yoshihiro Tange, Shingo Takesawa, Shigenori Yoshitake
Membrane fouling is a primary challenge encountered during the administration of hemodialysis (HD) and hemodiafiltration (HDF). A high-flux membrane is suitable for dialyzer reuse, since it is used repeatedly. Water flux is a benchmark used to assess the effectiveness of the dialysis membrane during treatment and it is usually evaluated to determine whether membrane fouling has occurred. Polysulfone (PS) membrane has good biocompatibility and solute permeability; however, polyethersulfone (PES) is often used as a hemodiafilter membrane because of better hydrophilicity compared to PS...
July 6, 2017: Journal of Artificial Organs: the Official Journal of the Japanese Society for Artificial Organs
https://www.readbyqxmd.com/read/28676904/differences-in-cvvh-vs-cvvhdf-in-the-management-of-sepsis-induced-acute-kidney-injury-in-critically-ill-patients
#2
Vedran Premuzic, Nikolina Basic-Jukic, Bojan Jelakovic, Petar Kes
We hypothesized that patients with sepsis and AKI, especially patients without preserved renal function, and treated with continuous veno-venous hemodiafiltration (CVVHDF), have lower risk for mortality than patients treated with continuous veno-venous hemofiltration (CVVH). Patients were included if they fulfilled the diagnosis of severe sepsis or septic shock, suffered AKI and received continuous renal replacement therapy (CRRT) in intensive care unit. There were 62 patients treated by CVVH and 75 treated by CVVHDF...
July 4, 2017: Journal of Artificial Organs: the Official Journal of the Japanese Society for Artificial Organs
https://www.readbyqxmd.com/read/28620709/artificial-hearts-recent-progress-republication-of-the-article-published-in-the%C3%A2-japanese-journal-of-artificial-organs
#3
REVIEW
Masahiro Nishida
This review was created based on a translation of the Japanese review written in the Japanese Journal of Artificial Organs in 2015 (Vol.44, No. 3, pp.130-135), with some modifications regarding several references published in 2015 or later.
June 15, 2017: Journal of Artificial Organs: the Official Journal of the Japanese Society for Artificial Organs
https://www.readbyqxmd.com/read/28600615/clinical-study-of-blood-purification-therapy-in-critical-care-in-japan-results-from-the-survey-research-of-the-japan-society-for-blood-purification-in-critical-care-in-2013
#4
Toshiaki Arimura, Masanori Abe, Hidetoshi Shiga, Hiroshi Katayama, Kazo Kaizu, Shigeto Oda
To clarify the clinical status of blood purification therapy (BPT) in critical care in Japan, we conducted a cohort study using data from a nationwide registry of the Japan Society for Blood Purification in Critical Care in 2013. We enrolled 2227 patients treated with BPT (female, 39.1%; mean age, 65.5 ± 12.1 years) in the intensive care units of 43 facilities. Patient characteristics, modes of BPT, and survival rate for each disease were investigated. In total, BPT was performed 3053 times. Continuous renal replacement therapy (CRRT) (57...
June 9, 2017: Journal of Artificial Organs: the Official Journal of the Japanese Society for Artificial Organs
https://www.readbyqxmd.com/read/28589286/extracorporeal-cytokine-elimination-as-rescue-therapy-in-refractory-septic-shock-a-prospective-single-center-study
#5
Sigrun Friesecke, Stephanie-Susanne Stecher, Stefan Gross, Stephan B Felix, Axel Nierhaus
Sepsis is the most common cause of death in medical intensive care units (ICU). If sepsis progresses to refractory septic shock, mortality may reach 90-100% despite optimum current therapy. Extracorporeal cytokine adsorption in addition to regular therapy was studied prospectively in refractory septic shock patients on a medical ICU. Refractory shock was defined as increasing vasopressor dose required to maintain mean arterial blood pressure above 65 mmHg or increasing lactate levels despite protocol-guided shock therapy for 6 h...
June 6, 2017: Journal of Artificial Organs: the Official Journal of the Japanese Society for Artificial Organs
https://www.readbyqxmd.com/read/28580527/non-occlusive-mesenteric-ischemia-in-a-patient-with-left-ventricular-assist-device-implantation
#6
Takaaki Samura, Koichi Toda, Daisuke Yoshioka, Hidekazu Takahashi, Shigeru Miyagawa, Yasushi Yoshikawa, Shunsuke Saito, Keitaro Domae, Yoshiki Sawa
Non-occlusive mesenteric ischemia (NOMI) is a devastating complication after cardiac surgery. Once patients develop NOMI, intra-mesenteric infusion of vasodilators and/or emergent laparotomy is usually required, but the mortality is extraordinarily high even with intensive treatment. We present a case of salvage of a patient with NOMI complicated with severe right ventricular dysfunction after left ventricular assist device (LVAD) implantation using maximum treatment with emergent laparotomy and temporary right ventricular assist device implantation...
June 3, 2017: Journal of Artificial Organs: the Official Journal of the Japanese Society for Artificial Organs
https://www.readbyqxmd.com/read/28567581/temporary-biventricular-support-with-extracorporeal-membrane-oxygenation-a-feasible-therapeutic-approach-for-cardiogenic-shock-with-multiple-organ-failure
#7
Osamu Seguchi, Tomoyuki Fujita, Takuya Watanabe, Kensuke Kuroda, Eriko Hisamatsu, Seiko Nakajima, Takuma Sato, Haruki Sunami, Masanobu Yanase, Hiroki Hata, Junjiro Kobayashi, Takeshi Nakatani, Norihide Fukushima
Various strategies using a ventricular assist device (VAD) are applied to rescue Interagency Registry for Mechanically Assisted Circulatory Support profile 1 (Profile-1) patients. However, the optimal use of VAD in Profile-1 patients has not been completely elucidated. We retrospectively reviewed 23 Profile-1 patients [mean age 36.9 ± 16.6 years, 14 males; 11 with non-ischemic cardiomyopathy (NICM), 9 with fulminant myocarditis (FM), 2 with ischemic cardiomyopathy (ICM), and 1 with peripartum cardiomyopathy (PPCM); 18 with pre-operative percutaneous extracorporeal membrane oxygenation (p-ECMO) support] who underwent VAD implantation from 2011 to 2015 at our institution...
May 31, 2017: Journal of Artificial Organs: the Official Journal of the Japanese Society for Artificial Organs
https://www.readbyqxmd.com/read/28516307/appropriate-control-time-constant-in-relation-to-characteristics-of-the-baroreflex-vascular-system-in-1-r-control-of-the-total-artificial-heart
#8
Sora Mizuta, Itsuro Saito, Takashi Isoyama, Shintaro Hara, Terumi Yurimoto, Xinyang Li, Haruka Murakami, Toshiya Ono, Kunihiko Mabuchi, Yusuke Abe
1/R control is a physiological control method of the total artificial heart (TAH) with which long-term survival was obtained with animal experiments. However, 1/R control occasionally diverged in the undulation pump TAH (UPTAH) animal experiment. To improve the control stability of the 1/R control, appropriate control time constant in relation to characteristics of the baroreflex vascular system was investigated with frequency analysis and numerical simulation. In the frequency analysis, data of five goats in which the UPTAH was implanted were analyzed with first Fourier transform technique to examine the vasomotion frequency...
May 17, 2017: Journal of Artificial Organs: the Official Journal of the Japanese Society for Artificial Organs
https://www.readbyqxmd.com/read/28500497/evaluation-of-endothelialization-in-the-center-part-of-graft-using-3%C3%A2-cm-vascular-grafts-implanted-in-the-abdominal-aortae-of-the-rat
#9
Toshiharu Fukayama, Yusuke Ozai, Haruka Shimokawatoko, Yusuke Kimura, Derya Aytemiz, Ryou Tanaka, Noboru Machida, Tetsuo Asakura
In order to develop small-diameter vascular grafts, it is necessary to evaluate endothelialization, especially, in the center part at early stage. For implantation of vascular grafts of 1 cm in length to abdominal aortae of rat, endothelial cells can be formed easily by stretching anastomosis. We evaluated the endothelialization in the center part of vascular grafts by implanting vascular grafts using transgenic (TG) silk fibroin (SF) of 3 cm in length. Vascular grafts were prepared 1.5 mm in diameter and 1 and 3 cm in length using wild type (WT) SF and TG SF by braiding structure, respectively...
May 12, 2017: Journal of Artificial Organs: the Official Journal of the Japanese Society for Artificial Organs
https://www.readbyqxmd.com/read/28488003/daily-transient-discontinuation-of-extracorporeal-lvad-to-prevent-thromboembolism-of-mechanical-aortic-valve-prosthesis
#10
Takamichi Inoue, Tadashi Kitamura, Shinzo Torii, Mitsuhiro Hirata, Toshiaki Mishima, Koichi Sughimoto, Hirotoki Ohkubo, Kensuke Kobayashi, Mamika Motokawa, Miyuki Shibata, Takuya Matsushiro, Yuta Tsuchida, Yurie Miyata, Minoru Ono, Kagami Miyaji
Patients with mechanical aortic valves are generally contraindicated for left ventricular assist device (LVAD) insertion because the prosthetic valve often becomes fixed in closed position. A 41-year-old woman with mechanical aortic valve prosthesis experienced sudden chest pain and developed cardiogenic shock. A paracorporeal pulsatile LVAD and a monopivot centrifugal pump as a right VAD (RVAD) were implanted. The mechanical aortic valve was intentionally left in place. Soon after the operation, LVAD support was discontinued daily for few seconds to allow the mechanical aortic valve to open and to avoid thrombus formation...
May 9, 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...
June 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.
June 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
#13
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...
June 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
#14
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...
June 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
#15
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...
June 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
#16
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...
June 2017: Journal of Artificial Organs: the Official Journal of the Japanese Society for Artificial Organs
https://www.readbyqxmd.com/read/28084568/technical-characterization-of-dialysis-fluid-flow-and-mass-transfer-rate-in-dialyzers-with-various-filtration-coefficients-using-dimensionless-correlation-equation
#17
Makoto Fukuda, Kengo Yoshimura, Koki Namekawa, Kiyotaka Sakai
The objective of the present study is to evaluate the effect of filtration coefficient and internal filtration on dialysis fluid flow and mass transfer coefficient in dialyzers using dimensionless mass transfer correlation equations. Aqueous solution of vitamin B12 clearances were obtained for REXEED-15L as a low flux dialyzer, and APS-15EA and APS-15UA as high flux dialyzers. All the other design specifications were identical for these dialyzers except for filtration coefficient. The overall mass transfer coefficient was calculated, moreover, the exponents of Reynolds number (Re) and film mass transfer coefficient of the dialysis-side fluid (k D) for each flow rate were derived from the Wilson plot and dimensionless correlation equation...
June 2017: Journal of Artificial Organs: the Official Journal of the Japanese Society for Artificial Organs
https://www.readbyqxmd.com/read/28054177/factors-associated-with-a-low-initial-cerebral-oxygen-saturation-value-in-patients-undergoing-cardiac-surgery
#18
Kensuke Kobayashi, Tadashi Kitamura, Satoshi Kohira, Shinzo Torii, Tetsuya Horai, Mitsuhiro Hirata, Toshiaki Mishima, Koichi Sughimoto, Hirotoki Ohkubo, Yusuke Irisawa, Takuya Matsushiro, Hidenori Hayashi, Yurie Miyata, Yuta Tsuchida, Naoki Ohtomo, Kagami Miyaji
Regional cerebral oximetry using near-infrared spectroscopy device, an INVOS 5100 C (Medtronic, Minneapolis, MN, USA), during cardiac surgery aims to avoid perioperative neurological impairment, especially during cardiopulmonary bypass. However, it is not uncommon to encounter critically low initial cerebral regional oxygen saturation or a low value unresponsive to intervention. Therefore, it is important to identify factors associated with low saturation value other than true cerebral hypoxia. We investigated the relationship between preoperative regional cerebral oxygen saturation and clinical variables during cardiac surgery...
June 2017: Journal of Artificial Organs: the Official Journal of the Japanese Society for Artificial Organs
https://www.readbyqxmd.com/read/27933398/ecmo-for-intractable-status-asthmaticus-following-atracurium
#19
Vittorio Scaravilli, Giacomo Grasselli, Annalisa Benini, Michela Bombino, Daniele Ceriani, Uta Emmig, Alberto Zanella, Nicolò Patroniti, Antonio Pesenti
Intraoperative allergic reactions are rare but serious events associated with increased morbidity and mortality. We report the salvage of intraoperative anaphylaxis leading to extreme hypercapnic respiratory failure by veno-venous extracorporeal membrane oxygenation (ECMO). A 38-year-old woman undergoing thyroidectomy developed intractable bronchospasm after administration of atracurium, leading to extreme hypercapnic respiratory failure (PaCO2 > 250 mmHg, pH 6.773). After the failure of conventional medical therapy and ventilatory optimization, the patient was connected to a veno-venous ECMO circuit...
June 2017: Journal of Artificial Organs: the Official Journal of the Japanese Society for Artificial Organs
https://www.readbyqxmd.com/read/27909839/biventricular-support-using-a-centrifugal-pump-in-a-6%C3%A2-year-old-with-fulminant-myocarditis
#20
Hiromu Kehara, Tamaki Takano, Takamitsu Terasaki, Kenji Okada
We experienced a case of ventricular assist with both a pulsatile-flow and a continuous-flow pump in a pediatric patient, and herein report the clinical course and characteristics of the pumps. A 6-year-old female was diagnosed with fulminant myocarditis and transferred to our hospital for mechanical support. After 12 days of extracorporeal membrane oxygenation, we implanted a left ventricular assist device (LVAD) and a right ventricular assist device (RVAD) using centrifugal Gyro pumps with a membrane oxygenator in a paracorporeal fashion...
June 2017: Journal of Artificial Organs: the Official Journal of the Japanese Society for Artificial Organs
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