Oval-Shaped Cardiac Cannula

a cardiac cannula and oval shape technology, applied in the field of cannulas, can solve the problems of size, geometry, space requirements of instruments, cannulas, etc., and achieve the effect of efficient occupying the space of the aperture without adversely affecting the fluid ra
US20070083161A1Inactive Publication Date: 2007-04-12MEDTRONIC INC
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Patent Information

Authority / Receiving Office
US · United States
Patent Type
Applications(United States)
Current Assignee / Owner
MEDTRONIC INC
Publication Date
2007-04-12
Estimated Expiration
Not applicable · inactive patent

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Abstract

A method of performing minimally invasive cardiac surgery includes the step of creating an access aperture into a patient's chest cavity, the access aperture being considerably smaller than a traditional cardiac surgery incision. A cannula is provided that has an oval portion with a longer major axis and a shorter minor axis and the cannula is inserted into the chest cavity through the access aperture.
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Description

CROSS-REFERENCE TO RELATED PATIENT APPLICATIONS

[0001] This application is a continuation of U.S. application Ser. No. 10 / 026,234, filed Dec. 21, 2001, which is a continuation of U.S. application Ser. No. 09 / 012,520 filed Jan. 23, 1998, U.S. Pat. No. 6,447,484, which is a continuation in part of U.S. application Ser. No. 08 / 780,995, filed Jan. 9, 1997, U.S. Pat. No. 5,817,071, all of which are incorporated herein by reference in their entirety.BACKGROUND OF THE INVENTION

[0002] 1. Field of the Invention

[0003] This invention relates to cannulas and, more particularly, to a cannula which is oval-shaped in cross-section and therefore ideally suited for use in minimally invasive surgical procedures.

[0004] 2. Description of the Related Art

[0005] Cannulas have a wide variety of applications during surgical procedures. For example, in coronary surgery, venous and arterial cannulas are used to conduct blood between the body and bypass equipment. Cannulas are used to conduct cardioplegia ...

Claims

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