The meaning of the turning point of the index of motor current amplitude curve in controlling a continuous flow pump or evaluation of left ventricular function.
In this series, we investigated the meaning of the t-point of index of motor current amplitude (ICA) curve from a point of view of flow rate on in vitro and in vivo studies. On mock circulation loop and left ventricular assist device (LVAD)-equipped pigs, we detected the t-point and compared the pump flow at the t-point with the simultaneous cardiac output. The pump flow at the t-point showed high correlation against the simultaneous cardiac output for in vitro or in vivo study. By detection of the t-point of the ICA curve and measuring or estimating the pump flow at t-point, the cardiac output may be assessed without any sensor in various cardiac conditions.
Endo
G J
GJ
Second Department of Surgery, Miyazaki Medical College, Kiyotake Miyazaki, Japan. sneakerg@post1.miyazaki-med.ac.jp
Kojima
K
K
Nakamura
K
K
Matsuzaki
Y
Y
Onitsuka
T
T
D000818:Animals; D001783:Blood Flow Velocity / Q000502:physiology; D002302:Cardiac Output / Q000502:physiology; D004195:Disease Models, Animal; D004867:Equipment Design; D019054:Evoked Potentials, Motor / Q000502:physiology*; D006353:Heart-Assist Devices; D006439:Hemodynamics / Q000502:physiology; D006801:Humans; D066298:In Vitro Techniques; D008955:Models, Cardiovascular; D012720:Severity of Illness Index; D013552:Swine; D018487:Ventricular Dysfunction, Left / Q000503:physiopathology*