Numerical simulations of blood flow in artificial and natural hearts with fluid-structure interaction.

abstract：:Ligament reconstruction using a tissue-engineered artificial ligament (TEAL) requires regeneration of the ligament-bone junction such that fixation devices such as screws and end buttons do not have to be used. The objective of this study was to develop a TEAL consisting of elastin-coated polydioxanone (PDS) sutures c...

journal_title：Artificial organs

authors： Hirukawa M,Katayama S,Sato T,Inoue K,Niwa K,Ito N,Hattori T,Hosoi T,Unno H,Suzuki Y,Hasegawa M,Miyamoto K,Horiuchi T

更新日期：2018-07-01 00:00:00

abstract：:This article introduces a unique miniaturization process of a magnetically levitated axial flow blood pump from a functional prototype to a pump suitable for animal trials. Through COMSOL three-dimensional finite element analysis and experimental verification, the hybrid magnetic bearings of the pump have been miniatu...

journal_title：Artificial organs

authors： Cheng S,Olles MW,Olsen DB,Joyce LD,Day SW

更新日期：2010-10-01 00:00:00

abstract：:Five hundred and eighty homograft valves have been inserted into the aortic position as isolated valve replacements, and followed up for 7--14 years. After ten years 90% of frozen homografts, 80% of autografts and 70% of freeze-dried homografts were free of valve-related death. There was only one embolism reported giv...

journal_title：Artificial organs

authors： Bodnar E,Wain WH,Martelli V,Ross DN

更新日期：1980-02-01 00:00:00

abstract：:Tissue-engineered heart valves constructed from a xenogeneic or allogeneic decellularized matrix might overcome the disadvantages of current heart valve substitutes. One major necessity besides effective decellularization is to preserve the biomechanical properties of the valve. Native and decellularized porcine pulmo...

journal_title：Artificial organs

authors： Seebacher G,Grasl C,Stoiber M,Rieder E,Kasimir MT,Dunkler D,Simon P,Weigel G,Schima H

更新日期：2008-01-01 00:00:00

abstract：:In vitro cardiovascular device performance evaluation in a mock circulation loop (MCL) is a necessary step prior to in vivo testing. A MCL that accurately represents the physiology of the cardiovascular system accelerates the assessment of the device's ability to treat pathological conditions. To serve this purpose, a...

journal_title：Artificial organs

authors： Timms DL,Gregory SD,Greatrex NA,Pearcy MJ,Fraser JF,Steinseifer U

更新日期：2011-04-01 00:00:00

abstract：:A computer simulation was carried out to investigate the influence of nonpulsatile left ventricular assistance on hemodynamics. A simulation circuit was constructed to represent the circulatory system. A source of current was added to denote the nonpulsatile blood pump. The left and right ventricles were replaced by v...

journal_title：Artificial organs

authors： Mitsui N,Fukunaga S,Koura Y,Morita S,Hotei H,Sueshiro M,Sueda T,Matsuura Y

更新日期：1996-05-01 00:00:00

abstract：:Capillary membrane filters are devices commonly used for plasmapheresis and recirculating detoxification systems, including plasmaseparation units. Besides clinical trials and case reports, research on plasmafiltration techniques is carried out using in vitro systems. Notably, such hemoperfused in vitro systems requir...

journal_title：Artificial organs

authors： Unger JK,Haltern C,Dohmen B,Rossaint R

更新日期：2003-07-01 00:00:00

abstract：:The determination of when to stop extracorporeal membrane oxygenation (ECMO) rests upon demonstration of the return of adequate cardiac function to support vital organs and permit subsequent recovery. In general, patients with myocardial stun will recover function within several days. Factors that limit recovery inclu...

journal_title：Artificial organs

authors： Steinhorn DM

更新日期：1999-11-01 00:00:00

abstract：:There is an increasing need for research and development centers to deal with design and evaluation of organ replacement systems, the improvement of older devices, and the study of biocompatibility problems. Special attention, in this article, is focused on the determinant role of the background of the investigators i...

journal_title：Artificial organs

authors： Vanholder R,Ringoir S

更新日期：1989-12-01 00:00:00

abstract：:Wall shear stress on the pump casing cover was measured using a surface-mounted hot-film sensor. In addition, the shear stress distribution in the pump was qualitatively investigated by means of oil-film visualization. The characteristics of shear stress in the pump are discussed, including the results on the oil-film...

journal_title：Artificial organs

authors： Mizunuma H,Nakajima R

更新日期：2007-07-01 00:00:00

abstract：:Veno-arterial extracorporeal membrane oxygenation (ECMO) may be implanted using peripheral ECMO (pECMO) or central ECMO (cECMO) cannulation techniques. The aim of this study was to compare the outcome between these two cannulation techniques. A retrospective study was performed at Düsseldorf University Hospital from O...

journal_title：Artificial organs

authors： Saeed D,Stosik H,Islamovic M,Albert A,Kamiya H,Maxhera B,Lichtenberg A

更新日期：2014-07-01 00:00:00

abstract：:The generation of anaphylatoxins, particularly C5a, is important in extracorporeal circulation therapies such as granulocyte/monocyte apheresis, which activates the complement system and elevates C5a levels. However, no side effects of granulocyte/monocyte apheresis using cellulose acetate beads have been reported. To...

journal_title：Artificial organs

authors： Takeda Y,Ohba M,Ueno M,Saniabadi AR,Wakabayashi I

更新日期：2010-12-01 00:00:00

abstract：:The aim of this study is to compare the effect of a single diode laser application and agitation of EDTA with diode laser with different parameters at different time intervals on root fracture. Ninety mandibular incisors were instrumented except the negative control group. The specimens were divided randomly into 10 g...

journal_title：Artificial organs

authors： Karataş E,Arslan H,Topçuoğlu HS,Yılmaz CB,Yeter KY,Ayrancı LB

更新日期：2016-06-01 00:00:00

abstract：:The purpose of this study was the investigation of the usability and ergonomics of ventricular assist devices (VADs) in everyday usage. Patients with four different VAD types were observed. After implantation, instruction, and discharge from the hospital, the patients returned on a regular basis to the outpatient clin...

journal_title：Artificial organs

authors： Geidl L,Zrunek P,Deckert Z,Zimpfer D,Sandner S,Wieselthaler G,Schima H

更新日期：2009-09-01 00:00:00

abstract：:Controlled and repeatable in vitro evaluation of cardiovascular devices using a mock circulation loop (MCL) is essential prior to in vivo or clinical trials. MCLs often consist of only a systemic circulation with no autoregulatory responses and limited validation. This study aimed to develop, and validate against huma...

journal_title：Artificial organs

authors： Gregory SD,Pauls JP,Wu EL,Stephens A,Steinseifer U,Tansley G,Fraser JF

更新日期：2020-06-01 00:00:00

abstract：:Renal Solutions Allient Sorbent Hemodialysis System utilizes a two-chambered pneumatic pump (Pulsar Blood Pump, Renal Solutions, Inc., Warrendale, PA, USA) to avoid limitations associated with peristaltic pumping systems. Single-needle access is enabled by counter-pulsing the two pump chambers, thereby obviating compl...

journal_title：Artificial organs

authors： Shu F,Parks R,Maholtz J,Ash S,Antaki JF

更新日期：2009-04-01 00:00:00

abstract：:Hemodialysis vascular access (VA) stenosis remains a frequent complication. However, early detection is challenging and costly. The aim of this in vitro study was to assess a new detection method based on pulse pressure analysis at the hemodialysis needle. A silicon model of a radiocephalic arteriovenous fistula was b...

journal_title：Artificial organs

authors： Van Canneyt K,Planken RN,Eloot S,Segers P,Verdonck P

更新日期：2010-02-01 00:00:00

abstract：:Our aim was to study the feasibility of implanting the Infant Jarvik 2015 in patients weighing less than 8 kg. The Infant Jarvik 2015 left ventricular assist device (LVAD) was tested in a hybrid simulator of the cardiovascular system reproducing specific patients' hemodynamics for different patient weights (2-7 kg). F...

journal_title：Artificial organs

authors： Di Molfetta A,Zielinski K,Ferrari G,Kozarski M,Okrzeja P,Iacobelli R,Filippelli S,Perri G,Darowski M,Massetti M,Jarvik R,Amodeo A

更新日期：2019-01-01 00:00:00

abstract：:Centrifugal blood pumps are considered to be generally superior to the traditionally used roller pumps in cardiopulmonary bypass. In our institute a new lightweight centrifugal sealless blood pump with a unique spherical thrust bearing and with a magnetic coupling was developed, the HiFlow. The small design makes the ...

journal_title：Artificial organs

authors： Göbel C,Eilers R,Reul H,Schwindke P,Jörger M,Rau G

更新日期：1997-07-01 00:00:00

abstract：:The treatment of rheumatoid arthritis remains difficult and often controversial. Plasma exchange has been advocated in some cases. In the present study 71 sessions of double filtration plasmapheresis (DFPP) were performed in 21 patients with rheumatoid arthritis in an average of 3.7 +/- 1.1 sessions per patient within...

journal_title：Artificial organs

authors： Liu JD,Zhang C,Li WS,Lun LD

更新日期：1997-02-01 00:00:00

abstract：:The use of and demand for functional electrical stimulation (FES) systems and conventional orthoses in the spinal cord lesioned population was assessed. The assessment was conducted by a postal survey of the members of the spinal injury associations in the U.K. Out of all the respondents, only 2% had used an FES syste...

journal_title：Artificial organs

authors： Maxwell DJ,Granat MH,Baardman G,Hermens HJ

更新日期：1999-05-01 00:00:00

abstract：:We have made an eccentric roller type total artificial heart (ERTAH). The ERTAH is a positive-displacement device comparable to a DeBakey roller pump. Its left and right outputs are determined by the size of its blood chambers, and the ratio of its left and right output is almost constant. We focused on an interatrial...

journal_title：Artificial organs

authors： Wada H,Fukunaga S,Watari M,Sakai H,Sugawara Y,Ochikubo H,Imai K,Shibamura H,Orihashi K,Sueda T,Matsuura Y

更新日期：1999-08-01 00:00:00

abstract：:The outcome predictors of intra-aortic balloon pump (IABP) in patients who undergo mitral valve surgery remain unknown. This study aimed to retrospectively review valvular surgery in patients who received an IABP to identify the predictors of failure of IABP support and anticipate the necessary therapy. This retrospec...

journal_title：Artificial organs

authors： Liang M,Wang C,Feng K,Chen G,Wang K,Wu Z

更新日期：2020-08-01 00:00:00

abstract：:Malfunction of bileaflet mechanical heart valves in the mitral position could either be due to patient-prosthesis mismatch (PPM) or leaflet obstruction. The aim of this article is to investigate the validity of current echocardiographic criteria used for diagnosis of mitral prosthesis malfunction, namely maximum veloc...

journal_title：Artificial organs

authors： Evin M,Guivier-Curien C,Pibarot P,Kadem L,Rieu R

更新日期：2016-05-01 00:00:00

abstract：:In chronic cardiomyopathy, mechanical circulatory support (MCS) plays an increasingly important role for children as the shortage of suitable donor hearts increases waiting time on the transplant list. We report our experience with the paracorporal Berlin Heart EXCOR System (Berlin Heart AG, Berlin, Germany) used as a...

journal_title：Artificial organs

authors： Schweiger M,Schrempf J,Sereinigg M,Prenner G,Tscheliessnigg KH,Wasler A,Krumnikel J,Gamillschegg A,Knez I

更新日期：2013-08-01 00:00:00

abstract：:The goal of this study was to determine whether porcine islets encapsulated in hollow fibers made of AN69 copolymer can correct hyperglycemia in diabetic mice and provide normal tolerance to a glucose challenge. In vitro perifusion of hollow fibers demonstrated the rapid kinetics of insulin release in response to gluc...

journal_title：Artificial organs

authors： Delaunay C,Darquy S,Honiger J,Capron F,Rouault C,Reach G

更新日期：1998-04-01 00:00:00

abstract：:In clinical application of rotary blood pumps, flow obstruction as a result of suction of the inflow cannula, kinking of tubing, or thrombus formation occurs quite frequently. Early detection of such problems is essential to avoid hemolysis, tissue degradation, or release of thrombi to the patient. A program was devel...

journal_title：Artificial organs

authors： Holzer S,Scherer R,Schmidt C,Schwendenwein I,Wieselthaler G,Noisser R,Schima H

更新日期：1995-07-01 00:00:00

abstract：:The objective of this study was to evaluate an alternative neonatal extracorporeal life support (ECLS) circuit with a RotaFlow centrifugal pump and Better-Bladder (BB) for hemodynamic performance and gaseous microemboli (GME) capture in a simulated neonatal ECLS system. The circuit consisted of a Maquet RotaFlow centr...

journal_title：Artificial organs

authors： Spencer SB,Wang S,Woitas K,Glass K,Kunselman AR,Ündar A

更新日期：2017-01-01 00:00:00

abstract：:We have developed a novel method to simultaneously evaluate thromboresistance of two different types of drip chambers with a filter used in extracorporeal blood circuits for hemodialysis using canine arteriovenous shunt models. Bilateral bypasses between the femoral artery and vein on both sides of the animal were for...

journal_title：Artificial organs

authors： Yamazaki M,Kobayashi K,Mori Y,Satoh T,Kubota S

更新日期：1997-02-01 00:00:00

abstract：:Following implantation of a left ventricular assist device (LVAD), acceptable functional performance is now being achieved; however, peak VO2 and peak work load (watts) remain considerably limited. Maximum physical capacity is essentially dependent on generated cardiac output (CO) and arteriovenous oxygen difference (...

journal_title：Artificial organs

authors： Schmidt T,Bjarnason-Wehrens B,Mommertz S,Hannig M,Schulte-Eistrup S,Willemsen D,Reiss N

更新日期：2018-07-01 00:00:00