Principle and basic property of the sequential flow pump

Hara, Shintaro; Maeno, Erina; Li, Xinyang; Yurimoto, Terumi; Igarashi, Takashi; Saito, Itsuro; Ono, Takahiro; Abe, Yusuke

doi:10.1007/s10047-017-0959-4

Cited by 5 publications

(4 citation statements)

References 11 publications

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“…The volute housing was made of transparent material (polymethylmethacrylate, PMMA) [81]. The shaft and bearing were made of titanium or stainless steel, and the hemolytic properties varied depending on the design of the bearing [82]. The stator was molded with epoxy resin to prevent water infiltration [83].…”

Section: Centrifugal and Axial Blood Pump Materialsmentioning

confidence: 99%

Biocompatible materials of pulsatile and rotary blood pumps: A brief review

Ahmed

Wang

Yang

2020

Reviews on Advanced Materials Science

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The biomedical materials that have been used in the structure of heart pumps are classified as biocompatible, and these can be metals, polymers, ceramics, and composites. Their positions in the pump vary according to the part’s function. Whereas various materials have different properties, all biomaterials chosen for cardiovascular applications should have excellent blood biocompatibility to reduce the likelihood of hemolysis and thrombosis. There are two major categories of the heart pumps; pulsatile and rotary blood pumps (axial and centrifugal) and the features of some of these materials allow them to be used in both. Rotary and pulsatile blood pump devices have to be fabricated from materials that do not result in adverse biological responses. The purpose of this review is to study the available biocompatible materials for the pulsatile and rotary blood pumps as clinically-approved materials and prototype heart pump materials. The current state of bio-compatible materials of rotary and pulsatile blood pump construction is presented. Some recent applications of surface amendment technology on the materials for heart assist devices were also reviewed for better understanding. The limitations of heart assist devices, and the future direction of artificial heart elements have been considered. This review will be considered as a comprehensive reference to rapidly understanding the necessary research in the field of biocompatible materials of pulsatile and blood rotary pumps.

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Section: Centrifugal and Axial Blood Pump Materialsmentioning

confidence: 99%

Biocompatible materials of pulsatile and rotary blood pumps: A brief review

Ahmed

Wang

Yang

2020

Reviews on Advanced Materials Science

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“…The mesh size was from 0.1 to 1.0 mm. The node and element numbers were 893,854 and 4,259,922, respectively [8][9][10][11][12]. Figure 4 shows a photograph of the developed TCP model.…”

Section: Cfd Analysismentioning

confidence: 99%

High Pressure-type Rotary Blood Pump with a New Principle

Ariyoshi

Hara

Igarashi

et al. 2018

ABE

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An extracorporeal membrane oxygenator (ECMO) is used for the management of severe heart or respiratory failure. In the conventional ECMO system, centrifugal blood pumps are commonly used in recent years. However, a relatively high rotational speed is required to perfuse against the high hydrodynamic resistance of the system circuit. High rotational speed causes high shear stress. To provide a blood pump that can be operated at a lower rotational speed than conventional centrifugal blood pumps, we propose a novel high-pressure type rotary blood pump named the toroidal convolution pump (TCP). In the TCP, uid that acquires centrifugal force from rotation of the impeller is returned to the impeller through the ow path and again acquires centrifugal force. With repetition of this cycle, uid is accelerated to generate high pressure. We investigated the performance and basic property of the TCP using an experimental model and computational uid dynamic (CFD) analysis. The TCP generated pump output of 5 L/min against a pressure head of 350 mmHg at a rotational speed of 2450 rpm. This rotational speed is much lower than that of conventional centrifugal blood pumps, which is usually higher than 3000 rpm. The ef ciency of the TCP including the motor was approximately 4.2% at that setting. CFD analysis showed symmetrical pressure distribution about the central pivot bearing. The pressure difference between inlet and outlet ports was approximately 40% higher than that of the experimental model. We found no excessive negative pressure that would cause hemolysis. Although we identi ed areas of high sheer stress, hemolysis is estimated to be low because of the short exposure time to the high sheer stress. We found no stagnant area that would cause thrombus formation.

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“…Hara et al [23] have developed the sequential flow pump to make the ECMO system more compact and 1 3…”

Section: Artificial Lung/ecmomentioning

confidence: 99%