title: Control of pulsatile rotary pumps without pressure sensors.
abstract: When ventricular assistance is achieved with a volumetric pump driven by an electric actuator, overpumping can cause venous collapse. To prevent this problem, pump speed must be monitored and controlled. The authors developed a regulatory system based on the current intensity signal from the electric motor. This signal is processed and compared with predicted values calculated according to a mathematical model at the beginning of each ejection phase. If a difference is detected, pump speed is adequately adjusted. The great advantage of this system is elimination of the need for an implantable pressure sensor. It requires a simple and ubiquitous electronic component, i.e., a resistor, that can be easily integrated into the motor control circuit and does not require calibration.
authors.affiliation: Teracor Sarl, Toulon, France.
authors.forename: J
authors.initials: J
authors.lastname: Trinkl
authors.forename: T
authors.initials: T
authors.lastname: Mesana
authors.forename: P
authors.initials: P
authors.lastname: Havlik
authors.forename: N
authors.initials: N
authors.lastname: Mitsui
authors.forename: J L
authors.initials: JL
authors.lastname: Demunck
authors.forename: I
authors.initials: I
authors.lastname: Dion
authors.forename: B
authors.initials: B
authors.lastname: Candelon
authors.forename: J R
authors.initials: JR
authors.lastname: Montiès
mesh_terms: D000818:Animals; D015924:Blood Pressure Monitors; D002417:Cattle; D006353:Heart-Assist Devices; D006439:Hemodynamics / Q000502:physiology; D006801:Humans; D011474:Prosthesis Design; D011673:Pulsatile Flow