Ripple reduction control of the undulation pump total artificial heart.

abstract：:This work presents results of preliminary studies concerning application of magnetic bearing in a ventricular assist device (VAD) being developed by Dante Pazzanese Institute of Cardiology-IDPC (São Paulo, Brazil). The VAD-IDPC has a novel architecture that distinguishes from other known VADs. In this, the rotor has a...

journal_title：Artificial organs

authors： Horikawa O,de Andrade AJ,da Silva I,Bock EG

更新日期：2008-04-01 00:00:00

abstract：:Extracorporeal human lymphatic organs are expected to be excellent tools in the study of human molecular and cellular bases of the immunologic balance and tissue harmony. A rational approach and process to design a device and a procedure to recreate the human lymph node environment in vitro is described with emphasis ...

journal_title：Artificial organs

authors： Giese C,Demmler CD,Ammer R,Hartmann S,Lubitz A,Miller L,Müller R,Marx U

更新日期：2006-10-01 00:00:00

abstract：:The principle of a patient-specific immunoadsorber (PsIA) is demonstrated. Studies with model systems (HSA/anti-HSA) on immobilization, stability, and leakage form the basis for the presented fast-performance liquid chromatography (FPLC) and batch experiments, which were conducted using two different protein A adsorbe...

journal_title：Artificial organs

authors： Kunkel S,Holtz M,Grossjohann B,Schuett W,Klinkmann H,Kong D,Yamada R,Kimura H,Matic GB,Ramlow W,Boeden HF

更新日期：2002-02-01 00:00:00

abstract：:Individualized short hemodialysis treatment schedules, approximately three 3-h treatments per week, were introduced in a nephrology unit in 1976. In May 1985, 259 patients had been treated, which corresponds to approximately 60 new patients per million inhabitants per year. Ages at start of therapy ranged between 17 a...

journal_title：Artificial organs

authors： Wauters JP,Bercini-Pansiot S,Gilliard N,Stauffer JC

更新日期：1986-06-01 00:00:00

abstract：:This article presents computational studies on the effects of inlet guide vanes (IGVs) on the flow pattern and shear stress in a centrifugal blood pump. The effect of IGVs is to introduce a pre-swirl to fluid particles entering the impeller with the intention that the fluid particles will travel along the blade profil...

journal_title：Artificial organs

authors： Chan WK,Wong YW,Yu SC,Chua LP

更新日期：2002-06-01 00:00:00

abstract：:Malnutrition is a common feature seen in chronic dialysis patients, and the survival rate of obese patients receiving such treatment is higher than that of lean patients. Irrespective of obesity or diabetes, dialysis patients commonly have insulin resistance, and the leading cause of death is cardiovascular (CV) disea...

journal_title：Artificial organs

authors： Tanaka S,Yano S,Sheikh AM,Nagai A,Sugimoto T

更新日期：2014-07-01 00:00:00

abstract：:In patients with reduced respiratory function, lung resection is associated with high risk because separate ventilation is generally needed for safe management. For patients with end-stage emphysema, intraoperative respiratory management is important and particularly difficult because neither incomplete oxygenation no...

journal_title：Artificial organs

authors： Tsunezuka Y,Sato H,Tsubota M,Seki M

更新日期：2000-01-01 00:00:00

abstract：:For some time now researchers have argued the efficacy of pulsatile versus nonpulsatile hemodynamic support. Pulsatile systems, while providing a more physiological pumping source, are burdened with a multiparametric output function that can greatly affect the utility of such ventricular assist device (VAD) support. A...

journal_title：Artificial organs

authors： Mills TC,Ott RA

更新日期：1992-04-01 00:00:00

abstract：:The injurious effects of reactive oxygen species on venous tissues and the potential protective role played by green tea polyphenol (GTPP) on human saphenous veins were investigated. Oxidative stress was induced exogenously in the vein segments, either by adding 0.8 or 1.6 M of H2O2, or by using 80 or 160 U/L of xanth...

journal_title：Artificial organs

authors： Han DW,Suh H,Park YH,Cho BK,Hyon SH,Park JC

更新日期：2003-12-01 00:00:00

abstract：:We tried to verify the hypothesis that increases in pump flow during diastole are matched by decreases in left ventricular (LV) output during systole. A calf (80 kg) was implanted with an implantable centrifugal blood pump (EVAHEART, SunMedical Technology Research Corp., Nagano, Japan) with left ventricle to aorta (LV...

journal_title：Artificial organs

authors： Akimoto T,Litwak KN,Yamazaki K,Litwak P,Kihara SI,Tagusari O,Yamazaki SI,Kameneva MV,Watach MJ,Umezu M,Tomioka J,Kormos RL,Koyanagi H,Griffith BP

更新日期：2001-09-01 00:00:00

abstract：:The optimization of the monomer composition, using a polymerization kinetic study and the mechanical behavior study of the composites, was the principal objective of this work. The monomeric mixture analyzed is a part of the composite that has been in development at the University of Campinas, Brazil. Parameters such ...

journal_title：Artificial organs

authors： López Palacio RE,de Carvalho Zavaglia CA

更新日期：2003-05-01 00:00:00

abstract：:To study the microvessels in bulbar conjunctiva, we conducted an experiment in goat with a pneumatically driven left heart bypass pump, which was replaced with an undulation pump-left ventricle assist device for 9 days. Three flow patterns were tested: complete pulsatile, continuous, and percentage of pulsatile. We st...

journal_title：Artificial organs

authors： Dobsák P,Novakova M,Baba A,Vasku J,Isoyama T,Saito I,Abe Y,Chinzei T,Imachi K

更新日期：2006-06-01 00:00:00

abstract：:To evaluate their toxicity at the cellular level, middle molecules from uremic serum were incubated with erythrocytes from healthy subjects and the activity of the enzyme Delta-aminolevulinic acid dehydrase (D-ALA-D) and peroxidative hemolysis were investigated. Uremic middle molecules caused a significant decrease of...

journal_title：Artificial organs

authors： Leber HW,Spiegelhalter R,Ulm A,Goubeaud G,Rawer P

更新日期：1978-11-01 00:00:00

abstract：:For many years, it was thought that nonpulsatile perfusion produced physiological and circulatory abnormalities. Since 1977, Yukihiko Nosé and his colleagues have challenged this misconception. Toward that end, they did show that if a 20% higher blood flow uses more than that required for a pulsatile blood pump, then ...

journal_title：Artificial organs

authors： Nosé Y,Kawahito K,Nakazawa T

更新日期：1996-05-01 00:00:00

abstract：:This study compares the effects of polyethylene glycol (PEG) modified bovine hemoglobin on vascular half-life and renal function in rabbits to those of unmodified bovine hemoglobin. Renal function was assessed by the measurement of the glomerular filtration rate, urinalysis, blood chemistries, hemoglobin (Hb) excretio...

journal_title：Artificial organs

authors： Conover CD,Gilbert CW,Shum KL,Shorr RG

更新日期：1997-08-01 00:00:00

abstract：:A small and light direct-drive centrifugal pump has been developed for cardiopulmonary bypass. In the development process, blood compatibility studies including a hemolysis study, an in vitro fluid dynamic performance study, and in vivo durability and feasibility studies were performed. The centrifugal pump with a 50 ...

journal_title：Artificial organs

authors： Jikuya T,Sasaki T,Aizawa T,Shiono M,Glueck JA,Smith CP,Feldman L,Sakuma I,Sekela ME,Noda T

更新日期：1992-12-01 00:00:00

abstract：:It has been speculated that testosterone stimulates erythropoiesis. We hypothesized that hemoglobin levels in hemodialysis (HD) patients are associated with serum testosterone concentrations. Testosterone, hemoglobin, and other biochemical parameters were measured in a representative sample of 98 chronic HD patients (...

journal_title：Artificial organs

authors： Ekart R,Taskovska M,Hojs N,Bevc S,Hojs R

更新日期：2014-07-01 00:00:00

abstract：:The purpose of this study was to investigate whether an artificial matrix can help neonatal cardiomyocytes restore an injured heart in a rat model of myocardial infarction (MI). The left coronary arteries of female Sprague Dawley (SD) rats were ligated to create MI models. Ventricular cardiomyocytes from 1- to 3-day-o...

journal_title：Artificial organs

authors： Zhang P,Zhang H,Wang H,Wei Y,Hu S

更新日期：2006-02-01 00:00:00

abstract：:The power-law based models for predicting shear-induced hemolysis are widely used in the optimization design of blood-contacting devices. However, this category of models has fallen short of accuracy when compared with the results of the in vitro experiments. The aim of this study is to develop an alternative model fr...

journal_title：Artificial organs

authors： Li H,Ruan X,Qian W,Fu X

更新日期：2014-12-01 00:00:00

abstract：:As the aortic valve (AV) opens, the pump pressure head remains constant, which is reflected as a "notch/plateau" in pump pressure and flow signals. However, instantaneous flow estimation may be influenced by friction and is particularly difficult in axial pumps. Therefore, a new method to determine the duration of AV ...

journal_title：Artificial organs

authors： Hayward C,Lim CP,Schima H,Macdonald P,Moscato F,Muthiah K,Granegger M

更新日期：2015-08-01 00:00:00

abstract：:The thrombogenicity of membrane oxygenators as well as clotting parameters profiles, using standard human clotting tests, was analyzed in calves and pigs during 6 h perfusion. Three calves and 3 pigs were connected to extracorporeal circulation with standard heparinization. Blood samples were taken for coagulation var...

journal_title：Artificial organs

authors： Mueller XM,Tevaearai HT,Jegger D,Tucker O,von Segesser LK

更新日期：2001-07-01 00:00:00

abstract：:We aimed to evaluate the timing of preoperative intra-aortic balloon pump (IABP) placement and outcomes in patients undergoing off-pump coronary artery bypass grafting (OPCAB). Patients with prophylactic IABP placement before OPCAB presenting between January 1, 2010 and December 31, 2013 were included. Patients were c...

journal_title：Artificial organs

authors： Liu F,Yang F,Du Z,Miao N,Zhao Y,Xu B,Hou X

更新日期：2018-03-01 00:00:00

abstract：:Visual prostheses are the focus of intensive research efforts to restore some measure of useful vision to blind or near-blind patients. The development of such technology is being guided to an extent by tools that simulate prosthesis behavior for healthy sighted subjects in order to assess system requirements and conf...

journal_title：Artificial organs

authors： Obeid I,Veraart C,Delbeke J

更新日期：2010-05-01 00:00:00

abstract：:Bone marrow mesenchymal stem cells (MSCs) have demonstrated their pluripotency to differentiate into different cell lineages and may be an alternative cell source for vascular tissue engineering. The objective of this study is to create small diameter vessels by seeding and culture of genetically modified MSCs onto a ...

journal_title：Artificial organs

authors： Zhang J,Qi H,Wang H,Hu P,Ou L,Guo S,Li J,Che Y,Yu Y,Kong D

更新日期：2006-12-01 00:00:00

abstract：:Proper wound healing can be assessed by monitoring the wound surface area. Its reduction by 10 or 50% should be achieved after 1 or 4 weeks, respectively, from the start of the applied therapy. There are various methods of wound area measurement, which differ in terms of the cost of the devices and their accuracy. Thi...

journal_title：Artificial organs

authors： Foltynski P,Ladyzynski P,Wojcicki JM

更新日期：2014-04-01 00:00:00

abstract：:Widespread use of heart transplantation is limited by the scarcity of donor organs. Total artificial heart (TAH) development has been pursued to address this shortage, especially to treat patients who require biventricular support. We have developed a novel TAH that utilizes a continuously spinning rotor that shuttles...

journal_title：Artificial organs

authors： Glynn J,Song H,Hull B,Withers S,Gelow J,Mudd J,Starr A,Wampler R

更新日期：2017-10-01 00:00:00

abstract：:Patients with kidney failure can only survive with some form of kidney replacement (transplant or dialysis). Unfortunately, innovations in kidney replacement therapy lag behind many other medical fields. This study compiles expert opinions on candidate technologies for future kidney replacement therapies. A worldwide ...

journal_title：Artificial organs

authors： Pereira Cabral B,Bonventre JV,Wieringa F,Mota FB

更新日期：2020-07-22 00:00:00

abstract：:We made miniature modules filled with artificial oxygenator hollow fibers and conducted a simple experiment to study the effect of different membrane structures on the blood. Three types of modules were made: one filled with polyolefin, one filled with polypropylene, and a blank module. The 3 modules were connected th...

journal_title：Artificial organs

authors： Nishida H,Shibuya M,Endo M,Koyanagi H

更新日期：1996-12-01 00:00:00

abstract：:The developments in apheresis techniques and their clinical applications world-wide are technologically driven. In the past, apheresis survey statistics have high-lighted both the differences by region in clinical practice and in the types of technologies utilized. Such differences have provided a basis for the scient...

journal_title：Artificial organs

authors： Malchesky PS,Bambauer R,Horiuchi T,Kaplan A,Sakurada Y,Samuelsson G

更新日期：1995-04-01 00:00:00

abstract：:The optimal anticoagulation regimen for hemodialysis (HD) in patients with heparin-induced thrombocytopenia (HIT) has not been defined. Hemodiafiltration (HDF) adds a large convective component to HD, thereby changing the pharmacokinetics of most anticoagulants. Data on coagulation regimens for HDF are scant. We there...

journal_title：Artificial organs

authors： Mahieu E,Claes K,Jacquemin M,Evenepoel P,Op De Beek K,Bogaert AM,Kuypers D,Verhamme P,Meijers B

更新日期：2013-05-01 00:00:00