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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/29785544/heartmate-ii-implantation-technique-that-spares-the-sternum-and-ascending-aorta
#1
Masashi Kawabori, Chitaru Kurihara, Tadahisa Sugiura, Andrew B Civitello, Jeffrey A Morgan
Left ventricular assist devices (LVADs) have become the standard therapy for patients with end-stage heart failure, and the use of LVADs for long-term support has grown exponentially over the past decade. As the number of LVAD implantations has increased, surgeons have faced more challenging cases, such as those in which the patient has previously undergone a sternotomy. The HeartMate II is one of the most widely implanted LVADs. The standard procedure for HeartMate II implantation is median sternotomy and sewing the outflow graft to the ascending aorta...
May 21, 2018: Journal of Artificial Organs: the Official Journal of the Japanese Society for Artificial Organs
https://www.readbyqxmd.com/read/29774445/pregnancy-complicated-by-influenza-a-ards-requiring-consecutive-vv-ecmo-treatment-with-successful-vaginal-delivery
#2
Peter Radsel, Vojka Gorjup, Anja Jazbec, Rihard Knafelj, Miha Lucovnik, Gorazd Kavsek, Lilijana Kornhauser Cerar, Marko Noc
A 29-year-old woman presented with influenza A ARDS at 23+0 weeks of gestation. Mechanical ventilation failed and VV-ECMO was started in a non-ECMO hospital. Transportation was performed on ECMO. Within 5 days ECMO weaning was successful. Fetal condition was stable, and decision to continue pregnancy was taken. However, second VV-ECMO was needed due to ventilator-associated pneumonia. At 25+6 weeks, the patient spontaneously delivered a neonate vaginally. Patient's condition improved, and ECMO could be removed 10 days postpartum...
May 17, 2018: Journal of Artificial Organs: the Official Journal of the Japanese Society for Artificial Organs
https://www.readbyqxmd.com/read/29766321/acute-kidney-injury-after-implantation-of-a-left-ventricular-assist-device-a-comparison-of-axial-flow-heartmate-ii-and-centrifugal-flow-heartware-hvad-devices
#3
Azeen Anjum, Chitaru Kurihara, Andre Critsinelis, Masashi Kawabori, Tadahisa Sugiura, Andrew B Civitello, Whitson B Etheridge, Reynolds M Delgado, Leo Simpson, Joggy K George, Ajith P Nair, O H Frazier, Jeffrey A Morgan
Continuous-flow left ventricular assist devices (CF-LVADs) are increasingly being used to treat advanced, refractory chronic heart failure. Herein, we sought to determine the incidence of postoperative acute kidney injury (AKI) in axial-flow (HeartMate II; HM-II) and centrifugal-flow (HVAD) CF-LVAD recipients, as well as the effect of AKI on mortality. The study cohort comprised 520 patients who received a HM-II (n = 398) or HVAD (n = 122) at our center between November 2003 and March 2016. Their records were reviewed to determine the incidence of RIFLE-defined AKI after LVAD implantation...
May 15, 2018: Journal of Artificial Organs: the Official Journal of the Japanese Society for Artificial Organs
https://www.readbyqxmd.com/read/29766320/weaning-from-prolonged-veno-venous-extracorporeal-membrane-oxygenation-ecmo-after-transfer-to-a-specialized-center-a-retrospective-study
#4
Frederik Seiler, Franziska C Trudzinski, Sabrina I Hörsch, Annegret Kamp, Carlos Metz, Monika Flaig, Mohammad Alqudrah, Holger Wehrfritz, Markus Kredel, Ralf M Muellenbach, Hendrik Haake, Robert Bals, Philipp M Lepper
Veno-venous extracorporeal membrane oxygenation (vvECMO) is increasingly used as rescue therapy in severe respiratory failure. In patients with pre-existent lung diseases or persistent lung injury weaning from vvECMO can be challenging. This study sought to investigate outcomes of patients transferred to a specialized ECMO center after prolonged ECMO therapy. We performed a retrospective analysis of all patients admitted to our medical intensive care unit (ICU) between 01/2013 and 12/2016 who were transferred from an external ICU after > 8 days on vvECMO...
May 15, 2018: Journal of Artificial Organs: the Official Journal of the Japanese Society for Artificial Organs
https://www.readbyqxmd.com/read/29761298/lumbar-muscle-atrophy-caused-by-harness-replacement-in-a-chronic-calf-model-of-total-artificial-heart-implantation
#5
Jamshid H Karimov, Kimberly A Such, Raymond Dessoffy, Kiyotaka Fukamachi
The postoperative care of animals implanted with mechanical circulatory support devices is complex. The standard of care requires continuous monitoring of hemodynamic parameters post implant, wound care, and maintenance of the animal's well-being, but also includes controlling the animal's biomechanics under conditions of continuous restraint and harnessing. In such studies, a harness provides secure fixation of the exteriorized device driveline and pressure lines and aids animal handling (lifting, position adjustment, and assistance with standing up)...
May 14, 2018: Journal of Artificial Organs: the Official Journal of the Japanese Society for Artificial Organs
https://www.readbyqxmd.com/read/29752586/comparison-of-tracheal-reconstruction-with-allograft-fresh-xenograft-and-artificial-trachea-scaffold-in-a-rabbit-model
#6
Jae Yeon Lee, Jeong Hun Park, Dong-Woo Cho
This study evaluated the possibility of tracheal reconstruction with allograft, pig-to-rabbit fresh xenograft or use of a tissue-engineered trachea, and compared acute rejection of three different transplanted tracheal segments in rabbits. Eighteen healthy New Zealand White rabbits weighing 2.5-3.1 kg were transplanted with three different types of trachea substitutes. Two rabbits and two alpha 1, 3-galactosyltransferase gene-knockout pigs weighing 5 kg were used as donors. The rabbits were divided into three groups: an allograft control group consisting of rabbit-to-rabbit allotransplantation animals (n = 6), a fresh xenograft group consisting of pig-to-rabbit xenotransplantation animals (n = 6), and an artificial trachea scaffold group (n = 6)...
May 12, 2018: Journal of Artificial Organs: the Official Journal of the Japanese Society for Artificial Organs
https://www.readbyqxmd.com/read/29675599/immunoadsorption-plasmapheresis-treatment-for-the-recurrent-exacerbation-of-neuromyelitis-optica-spectrum-disorder-with-a-fluctuating-anti-aquaporin-4-antibody-level
#7
Hiroaki Nishimura, Hideki Enokida, Taiji Sakamoto, Toshiyuki Takahashi, Hiroshi Hayami, Masayuki Nakagawa
The pathogenesis in the exacerbation of neuromyelitis optica spectrum disorder (NMOSD) involves mainly the serum anti-aquaporin-4 (AQP4) immunoglobulin G antibody (anti-AQP4 antibody). If high-dose corticosteroid treatment is not achieved during remission, rescue plasmapheresis is recommended. However, there are few reports on the therapeutic efficacy of repetitive immunoadsorption plasmapheresis (IAPP) for the recurrent exacerbation of NMOSD with a fluctuating anti-AQP4 antibody level. A 36-year-old man presented with a reduction of visual acuity (VA) on the right eye (OD) to 20/250...
April 19, 2018: Journal of Artificial Organs: the Official Journal of the Japanese Society for Artificial Organs
https://www.readbyqxmd.com/read/29651631/sleep-and-self-care-correlates-before-and-after-implantation-of-a-left-ventricular-assist-device-lvad
#8
Jesus M Casida, Jean E Davis, Francis D Pagani, James E Aikens, Celeste Williams, James J Yang
The impact of sleep on LVAD patients' self-care behaviors is unknown. This study examined the patterns and changes of patients sleep quality (SQ), daytime sleepiness (DS), instrumental activities of daily living (IADL), and self-care capability (SCC) before and after LVAD. In addition, the relationships among these variables were explored. This observational study consisted of 38 subjects from two VAD Centers in Michigan. The subjects completed self-reported demographics and psychometrically sound SQ, DS, IADL, and SCC questionnaires before LVAD implant and at 1, 3, and 6 months after implant...
April 13, 2018: Journal of Artificial Organs: the Official Journal of the Japanese Society for Artificial Organs
https://www.readbyqxmd.com/read/29637400/design-of-in-situ-porcine-closed-circuit-system-for-assessing-blood-contacting-biomaterials
#9
Maria Chiara Munisso, Atsushi Mahara, Tetsuji Yamaoka
The overall pre-clinical process of determining the blood compatibility of any medical device involves several stages. Although the primary purpose is to protect the patients, laboratory testing has been over-utilized for many years with a huge number of unnecessary animal tests being done routinely. Recently, the elimination of needless testing has become important in controlling the cost of healthcare and in addressing many issues related to the ethics of animal research. With this in mind, we designed a new in situ porcine closed-circuit system to study the complex interplay between platelets, coagulation proteins, and other cellular elements in pigs...
April 11, 2018: Journal of Artificial Organs: the Official Journal of the Japanese Society for Artificial Organs
https://www.readbyqxmd.com/read/29627867/effect-of-obesity-on-postoperative-outcomes-in-patients-with-left-ventricular-assist-device
#10
LETTER
Orhan Gokalp, Hasan Iner, Yuksel Besir, Nihan Karakas Yesilkaya, Gamze Gokalp, Kazim Ergunes, Sahin Iscan
No abstract text is available yet for this article.
April 7, 2018: Journal of Artificial Organs: the Official Journal of the Japanese Society for Artificial Organs
https://www.readbyqxmd.com/read/29623488/correction-to-inhalative-sedation-with-small-tidal-volumes-under-venovenous-ecmo
#11
Axel Rand, Peter K Zahn, Thomas A Schildhauer, Christian Waydhas, Uwe Hamsen
In the original publication, the affiliations of fourth and fifth authors were published incorrectly. The corrected affiliations are given in this correction.
April 5, 2018: Journal of Artificial Organs: the Official Journal of the Japanese Society for Artificial Organs
https://www.readbyqxmd.com/read/29616367/anatomical-study-of-the-cleveland-clinic-continuous-flow-total-artificial-heart-in-adult-and-pediatric-configurations
#12
Kiyotaka Fukamachi, Jamshid H Karimov, Nicole A Byram, Gengo Sunagawa, Raymond Dessoffy, Takuma Miyamoto, David J Horvath
The purpose of this study was to assess the smallest possible body sizes of patients in whom the Cleveland Clinic continuous-flow total artificial heart for adult (CFTAH) and pediatric configurations (P-CFTAH) can fit. One of the most critical dimensions is the vertebra-to-sternum distance at the junction of the right atrium to the inferior vena cava (V-S distance). Our previous CFTAH anatomical fitting study suggested that the CFTAH would fit patients of V-S distance ≥ 7.5 cm and the P-CFTAH of V-S distance ≥ 5...
April 3, 2018: Journal of Artificial Organs: the Official Journal of the Japanese Society for Artificial Organs
https://www.readbyqxmd.com/read/29611147/effect-of-improved-navigation-performance-on-the-accuracy-of-implant-placement-in-total-hip-arthroplasty-with-a-ct-based-navigation-system
#13
Ichiro Nakahara, Takayuki Kyo, Yasuo Kuroda, Hidenobu Miki
A computed tomography (CT)-based navigation system is one of the support tools to place implant with appropriate alignment and position in total hip arthroplasty (THA). To determine whether the higher performance of the navigation would further improve the accuracy of implant placement in the clinical setting, we retrospectively compared the navigation accuracy of two different versions of a navigation system. The newer version of the navigation system had an upgraded optical sensor with superior positional accuracy...
April 2, 2018: Journal of Artificial Organs: the Official Journal of the Japanese Society for Artificial Organs
https://www.readbyqxmd.com/read/29603026/wall-thickness-control-in-biotubes-prepared-using-type-c-mold
#14
Takeshi Terazawa, Takanori Nishimura, Tomohiro Mitani, Osamu Ichii, Teppei Ikeda, Keigo Kosenda, Eisuke Tatsumi, Yasuhide Nakayama
A type-C mold based on in-body tissue architecture was previously developed for preparing small-diameter biotube vascular grafts with a 2-mm diameter and approximately 1-mm wall thickness. In this study, the type-C mold was modified for preparing large-diameter biotubes with controlled wall thicknesses. Four types of molds were assembled by inserting silicone center rods (outer diameters 11, 13, 15, 17 mm) into stainless steel cages (inner diameter 19 mm) and surgically embedded in the abdominal subcutaneous pouches of Holstein cows...
March 30, 2018: Journal of Artificial Organs: the Official Journal of the Japanese Society for Artificial Organs
https://www.readbyqxmd.com/read/29582175/exogenous-surfactant-as-a-bridge-to-prolonged-total-lung-rest-in-severely-injured-patient-during-extracorporeal-membrane-oxygenation
#15
Peter Sklienka, Jan Maca, Filip Bursa, Jan Neiser, Roman Kula, Marcela Kanova, Tomas Danek, Pavel Sevcik
We report a case of a 20-year-old male patient suffering from motorcycle accident complicated by rapid development of severe refractory hypoxemia and hypercapnia due to serious bilateral lung contusions and lacerations. Positive pressure mechanical ventilation induced pressure-dependent massive air leak from disrupted pulmonary tissue. Simultaneous implementation of veno-venous extracorporeal membrane oxygenation together with surfactant application allowed prolonged disconnection of patient from mechanical ventilation ("total lung rest" mode)...
March 27, 2018: Journal of Artificial Organs: the Official Journal of the Japanese Society for Artificial Organs
https://www.readbyqxmd.com/read/29574652/extracorporeal-life-support-for-immune-reconstitution-inflammatory-syndrome-in-hiv-patients-with-pneumocystis-jirovecii-pneumonia
#16
Kollengode Ramanathan, Julian K Svasti, Graeme MacLaren
Patients with immunosuppression from human immunodeficiency virus (HIV) have been traditionally considered poor candidates for extracorporeal membrane oxygenation (ECMO) because of high in-hospital mortality and poor long-term survival. Highly active antiretroviral therapy (HAART) has improved survival rates in compliant HIV patients and reversible severe respiratory failure may warrant ECMO in this group. Immune reconstitution inflammatory syndrome (IRIS) involves excessive inflammatory response to a pathogen with paradoxical clinical deterioration following HAART initiation and may present as severe respiratory failure...
March 24, 2018: Journal of Artificial Organs: the Official Journal of the Japanese Society for Artificial Organs
https://www.readbyqxmd.com/read/29556869/to-what-extent-can-3d-model-replicate-dimensions-of-individual-mitral-valve-prolapse
#17
Takashi Shirakawa, Masao Yoshitatsu, Yasushi Koyama, Akira Kurata, Toru Miyoshi, Hiroki Mizoguchi, Takafumi Masai, Koichi Toda, Yoshiki Sawa
Determining the complex geometry of mitral valve prolapse is often difficult. We constructed 3D models of six prolapsed mitral valves for surgical assessment, and evaluated how accurately the models could replicate individual valve dimensions. 3D polygon data were constructed based on an original segmentation method for computed tomography images. The model's replication performance was confirmed via dimensional comparison between the actual hearts during surgery and those models. The results revealed that the prolapsed segments matched in all cases; however, torn chordae were replicated in four cases...
March 19, 2018: Journal of Artificial Organs: the Official Journal of the Japanese Society for Artificial Organs
https://www.readbyqxmd.com/read/29546615/blood-stream-infection-is-associated-with-cerebrovascular-accident-in-patients-with-left-ventricular-assist-device-a-systematic-review-and-meta-analysis
#18
Napatt Kanjanahattakij, Benjamin Horn, Basma Abdulhadi, Nicha Wongjarupong, Kenechukwu Mezue, Pattara Rattanawong
Cerebrovascular accident (CVA) is one of the major complications and a leading cause of death in patients with a left ventricular assist device (LVAD). Multiple studies of have shown that patients with blood stream infection (BSI) are more likely to develop CVA compared to patients without BSI. However, there is no meta-analysis to confirm this association. Studies were systematically acquired from MEDLINE and EMBASE electronic databases. Included studies assessed patients with heart failure requiring LVAD and reported the number of patients who had BSI post LVAD, incidence of ischemic CVA, hemorrhagic CVA, or any CVA...
March 16, 2018: Journal of Artificial Organs: the Official Journal of the Japanese Society for Artificial Organs
https://www.readbyqxmd.com/read/29541945/anticoagulation-management-during-cardiopulmonary-bypass-in-patients-with-antiphospholipid-syndrome
#19
Tatsuya Seki, Yasushige Shingu, Hiroshi Sugiki, Satoru Wakasa, Hiroki Katoh, Tomonori Ooka, Tsuyoshi Tachibana, Suguru Kubota, Yoshiro Matsui
Antiphospholipid syndrome (APS) is a complex autoimmune disease often related to systemic lupus erythematosus. Although adequate anticoagulation is important for APS patients during cardiopulmonary bypass, clotting tests can be potentially misleading due to antiphospholipid antibodies. We performed cardiac surgery safely in two APS patients under anticoagulation monitoring determined using preoperative heparin titration. We performed heparin titration for activated clotting time to determine the appropriate heparin concentration during cardiac surgery...
March 14, 2018: Journal of Artificial Organs: the Official Journal of the Japanese Society for Artificial Organs
https://www.readbyqxmd.com/read/29511934/the-scalographic-pattern-of-morlet-continuous-wavelet-transform-can-differentiate-bileaflet-valve-function
#20
Hiroshi Sugiki, Kenji Sugiki
The authors have discussed the significance of the Morlet continuous wavelet transform of bileaflet mechanical heart valve (BLMHV) sound for detecting its malfunction: consecutive single patterns on the scalogram alway suggested its malfunction, whereas the tandem pattern with two steepled figures was demonstrated in both normal and malfunctioning valves. Therefore, authors have tried to distinguish this pattern between them by manually calculated multiple scalographic parameters. Although only the sum of wavelet coefficients (SWC) is supposed to be closer to valve sound property than other parameters, its calculation was not available in the original wavelet application...
March 6, 2018: Journal of Artificial Organs: the Official Journal of the Japanese Society for Artificial Organs
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