Extra cardiac ventricular assist device

Patent 5713954 Issued on February 3, 1998. Estimated Expiration Date:

June 13, 2015. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.

Abstract Claims Description Full Text

Patent References

3464322

3587567

3613672

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Inventors

Application

No. 490080 filed on 06/13/1995

US Classes:

600/17, With condition responsive means601/153Means for enclosing internal body organ (e.g., heart)

Examiners

Primary: Willse, David H.

Attorney, Agent or Firm

Lahive & Cockfield, LLP

Foreign Patent References

0370931 EP 05/13/1990
1734767 SU 05/13/1992

International Class

A61M 001/12

Abstract

An artificial implantable heart assist system with an artificial myocardium employs a number of flexible, non-distensible tubes with the walls along their long axes connected in series to form a cuff. The tubes are sealed for purposes of inflation and deflation with either hydraulic fluid or pneumatic fluid. The cuff is placed around the natural heart. The inflation of the tubular segments provides that they have a circular cross-section, while in the deflated, or collapsed position without being fluid filled, they are essentially flat sheets. The difference in the perimeter length of the cuff in the plane of the tube short axis, arising from the fact that, inflated, each tube has a length along its perimeter equal to the diameter of the inflated tube, while deflated it has a length equal to the perimeter of the tube divided by two, provides for a contractile force. An energy converter is provided in the system for shuttling fluid between a compliant reservoir and the cuff in phase with the systolic and diastolic phase of the natural heart. This system is powered by an internal implanted battery, which can be recharged transcutaneously from an external power source.

Other References

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