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Continuous monitoring of pump performance is essential and effective for optimal driving of a pulsatile blood pump. The authors contrived a practical method for continuous estimation of blood volume in a pump by measurement of electrical impedance (Z). This method was evaluated with the air-driven, diaphragm type pump. The pump was made from polyurethane and had two metal connectors at the inlet and the outlet ports. Z was measured by charging the alternating current (50 kHz, 0.4 mA) between two connectors as electrodes. In in vitro tests, Z reached maximum value during full-empty and minimum value at full-fill. The blood volume calculated by an empirical equation of Z was linearly related to the real blood volume (r = 0.99). In in vivo tests with goats, pump output estimated by this method was linearly related to pump output measured with an electromagnetic flowmeter and effectively evaluated pump performance. For calibration, this method needed only to measure Z at full-fill. This method was useful as a controller of a full-fill to full-empty drive. It was concluded that this method is a practical estimate of pump performance, even if implantable diaphragm type pumps are used, and easily applicable to any kind of pulsatile pump.
E Sasaki, and
T Nakatani, and
Y Taenaka, and
H Noda, and
E Tatsumi, and
H Akagi, and
T Masuzawa, and
M Goto, and
M Sakaki, and
Y Matsuo
December 2006,
Cardiovascular engineering (Dordrecht, Netherlands),
E Sasaki, and
T Nakatani, and
Y Taenaka, and
H Noda, and
E Tatsumi, and
H Akagi, and
T Masuzawa, and
M Goto, and
M Sakaki, and
Y Matsuo
May 2017,
Revista medica de Chile,
E Sasaki, and
T Nakatani, and
Y Taenaka, and
H Noda, and
E Tatsumi, and
H Akagi, and
T Masuzawa, and
M Goto, and
M Sakaki, and
Y Matsuo
October 2003,
Artificial organs,
E Sasaki, and
T Nakatani, and
Y Taenaka, and
H Noda, and
E Tatsumi, and
H Akagi, and
T Masuzawa, and
M Goto, and
M Sakaki, and
Y Matsuo
January 1985,
Soins. Chirurgie (Paris, France : 1982),
E Sasaki, and
T Nakatani, and
Y Taenaka, and
H Noda, and
E Tatsumi, and
H Akagi, and
T Masuzawa, and
M Goto, and
M Sakaki, and
Y Matsuo
June 2010,
The Journal of heart and lung transplantation : the official publication of the International Society for Heart Transplantation,
E Sasaki, and
T Nakatani, and
Y Taenaka, and
H Noda, and
E Tatsumi, and
H Akagi, and
T Masuzawa, and
M Goto, and
M Sakaki, and
Y Matsuo
December 1990,
Artificial organs,
E Sasaki, and
T Nakatani, and
Y Taenaka, and
H Noda, and
E Tatsumi, and
H Akagi, and
T Masuzawa, and
M Goto, and
M Sakaki, and
Y Matsuo
January 1998,
ASAIO journal (American Society for Artificial Internal Organs : 1992),
E Sasaki, and
T Nakatani, and
Y Taenaka, and
H Noda, and
E Tatsumi, and
H Akagi, and
T Masuzawa, and
M Goto, and
M Sakaki, and
Y Matsuo
January 2023,
Wiener klinische Wochenschrift,
E Sasaki, and
T Nakatani, and
Y Taenaka, and
H Noda, and
E Tatsumi, and
H Akagi, and
T Masuzawa, and
M Goto, and
M Sakaki, and
Y Matsuo
December 2017,
Journal of artificial organs : the official journal of the Japanese Society for Artificial Organs,
E Sasaki, and
T Nakatani, and
Y Taenaka, and
H Noda, and
E Tatsumi, and
H Akagi, and
T Masuzawa, and
M Goto, and
M Sakaki, and
Y Matsuo
June 2000,
Artificial organs,
