Experimental Study of Dynamic Characteristics of a Centrifugal Blood Pump With a Conical Spiral Groove Bearing for a Ventricular Assist Device

Ventricular assist device (VAD) has been effective for cardiac patient. The VAD is set downstream of the heart, the pulsation of which effects the blood pump of the VAD. Therefore, the dynamic characteristics of the blood pump are important. In this study, we investigated the dynamic characteristics and rotor whirling motion of a centrifugal blood pump with a Conical Spiral Groove Bearing (CSGB). The flow through the pump was excited from 0.25 to 3 Hz by the vibration exciter in the mock circulatory system, and the conditions for stability of the blood pump were determined based on the dynamic characteristics tests.

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Analysis of backflow within an external centrifugal blood pump for ventricular assist device

The 6th 2013 Biomedical Engineering International Conference ◽

10.1109/bmeicon.2013.6687729 ◽

2013 ◽

Author(s):

Chitsanupong Rungsirigulnan ◽

Ravi Laohasurayodhin ◽

Thisana Tuanthammaruk ◽

Yanee Chusri ◽

Paweena Diloksumpan ◽

...

Keyword(s):

Ventricular Assist Device ◽

Blood Pump ◽

Assist Device ◽

Ventricular Assist ◽

Centrifugal Blood Pump

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Five-week use of a monopivot centrifugal blood pump as a right ventricular assist device in severe dilated cardiomyopathy

Journal of Artificial Organs ◽

10.1007/s10047-013-0740-2 ◽

2013 ◽

Vol 17 (1) ◽

pp. 95-98 ◽

Cited By ~ 7

Author(s):

Takamichi Inoue ◽

Tadashi Kitamura ◽

Shinzo Torii ◽

Naoji Hanayama ◽

Norihiko Oka ◽

...

Keyword(s):

Right Ventricular ◽

Dilated Cardiomyopathy ◽

Ventricular Assist Device ◽

Blood Pump ◽

Assist Device ◽

Ventricular Assist ◽

Centrifugal Blood Pump ◽

Right Ventricular Assist Device

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HeartQuest Ventricular Assist Device Magnetically Levitated Centrifugal Blood Pump

Artificial Organs ◽

10.1111/j.1525-1594.2006.00223.x ◽

2006 ◽

Vol 30 (5) ◽

pp. 339-346 ◽

Cited By ~ 25

Author(s):

Gill B. Bearnson ◽

Gordon B. Jacobs ◽

John Kirk ◽

Pratap S. Khanwilkar ◽

Karl E. Nelson ◽

...

Keyword(s):

Ventricular Assist Device ◽

Blood Pump ◽

Assist Device ◽

Ventricular Assist ◽

Centrifugal Blood Pump ◽

Magnetically Levitated

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OVER THREE-MONTH IN VIVO VENTRICULAR ASSIST DEVICE STUDY WITH THE IMPLANTABLE CENTRIFUGAL BLOOD PUMP

ASAIO Journal ◽

10.1097/00002480-200603000-00177 ◽

2006 ◽

Vol 52 (2) ◽

pp. 40A

Author(s):

Yuji Suda ◽

Tadashi Motomura ◽

Toshiya Okahisa ◽

Steve Igo ◽

Erlend Hansen ◽

...

Keyword(s):

Ventricular Assist Device ◽

Blood Pump ◽

Assist Device ◽

Ventricular Assist ◽

Centrifugal Blood Pump

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Plasma skimming efficiency of human blood in the spiral groove bearing of a centrifugal blood pump

Journal of Artificial Organs ◽

10.1007/s10047-020-01221-9 ◽

2020 ◽

Author(s):

Daisuke Sakota ◽

Kazuki Kondo ◽

Ryo Kosaka ◽

Masahiro Nishida ◽

Osamu Maruyama

Keyword(s):

Red Blood Cells ◽

Human Blood ◽

Blood Cells ◽

High Speed ◽

Blood Pump ◽

Spiral Groove ◽

Centrifugal Blood Pump ◽

Plasma Skimming ◽

Ridge Area ◽

Spiral Groove Bearing

Abstract This work investigates the plasma skimming effect in a spiral groove bearing within a hydrodynamically levitated centrifugal blood pump when working with human blood having a hematocrit value from 0 to 40%. The present study assessed the evaluation based on a method that clarified the limitations associated with such assessments. Human blood was circulated in a closed-loop circuit via a pump operating at 4000 rpm at a flow rate of 5 L/min. Red blood cells flowing through a ridge area of the bearing were directly observed using a high-speed microscope. The hematocrit value in the ridge area was calculated using the mean corpuscular volume, the bearing gap, the cross-sectional area of a red blood cell, and the occupancy of red blood cells. The latter value was obtained from photographic images by dividing the number of pixels showing red blood cells in the evaluation area by the total number of pixels in this area. The plasma skimming efficiency was calculated as the extent to which the hematocrit of the working blood was reduced in the ridge area. For the hematocrit in the circuit from 0 to 40%, the plasma skimming efficiency was approximately 90%, meaning that the hematocrit in the ridge area became 10% as compared to that in the circuit. For a hematocrit of 20% and over, red blood cells almost completely occupied the ridge. Thus, a valid assessment of plasma skimming was only possible when the hematocrit was less than 20%.

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