Drive mechanism for powering intravascular blood pumps

Details Drive mechanism for powering intravascular blood pumps Drive mechanism for powering intravascular blood pumps

1987-12-07

1990-01-23

Pellegrino, Stephen C.

Surgery

Cardiac augmentation

604151, 623 3, 415900, A61F 124

Patent

active

048955574

ABSTRACT:
A disposable, sterilizable cable drive unit for an intravascular blood pump includes a rotor enclosed in a fluid-tight enclosure which can be slipped into the stator of a drive motor. The unit is connectable to a constant-rate purge fluid supply and to a dual-lumen cable sheath. One lumen provides a sterile purge fluid path; the other carries the drive cable to the blood pump and provides a return path for a flushing fluid in which the cable is immersed. The flushing unit is derived from the purge fluid supply at a constant rate, and the rotor may also be immersed in it if desired. The unit is held in the drive motor by a manually operated detent, and the self-centering action of the rotor aligns it with the stator when the motor is energized. The motor is mounted on a gimbal so as to be alignable with the cable sheath at its point of insertion into the patient's vascular system, in order to prevent stresses on the patient and kinks in the cable sheath.

REFERENCES:
patent: 3568659 (1971-03-01), Karnegis
patent: 3904901 (1975-09-01), Renard et al.
patent: 4102610 (1978-07-01), Taboada et al.
patent: 4445509 (1984-05-01), Auth
patent: 4591355 (1986-05-01), Hilse
patent: 4625712 (1986-12-01), Wampler
patent: 4631052 (1986-12-01), Kensey
patent: 4688998 (1987-08-01), Olsen et al.
patent: 4729763 (1988-03-01), Henrie
patent: 4753221 (1988-06-01), Kensey et al.

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