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Heart Surgery

Implantable-peristaltic-pump-techniques

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Implantable peristaltic pump techniques

Details

Inventors: Robinson, Reginald D.;
Assignee: Medtronic, Inc. (Minneapolis, MN)
Primary Examiner: DeMille; Danton D.
Assistant Examiner:
Attorney, Agent or Firm: Banner & Witcoff Ltd

A peristaltic pump for an implantable medical device includes a pump tube defining an axis lying along a path in a first plane. Spherical rollers compress the tube at one or more points along the path in a direction non-parallel to the first plane, and preferably perpendicular to the first plane. Means for driving the rollers are provided so that liquid is moved through the tube.

DETAILED DESCRIPTION A peristaltic pump made in accordance with the invention is suitable for an implantable medical device.
According to a preferred embodiment, a pump tube holds liquid to be pumped, and the tube defines an axis lying along a path.
A first race supports the tube in a first plane.
Roller means compress the tube at one or more points along the path in a direction non-parallel to the first plane.
Means are provided for moving the roller means relative to the tube along the path so that liquid is moved through the tube.
By using the foregoing arrangement, a highly accurate peristaltic pump can be fabricated with low tolerances.
No machining is required, and the pump parts are easily assembled.

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