Surgery – Instruments – Surgical mesh – connector – clip – clamp or band
Reexamination Certificate
2001-12-26
2004-11-09
Jackson, Gary (Department: 3731)
Surgery
Instruments
Surgical mesh, connector, clip, clamp or band
C606S185000, C606S213000
Reexamination Certificate
active
06814743
ABSTRACT:
FIELD OF THE INVENTION
This invention relates to coronary bypass grafting surgery and more particularly to instruments and method to facilitate performing an aortotomy and proximal anastomosis, for example, associated with coronary artery bypass grafting surgery.
BACKGROUND OF THE INVENTION
Contemporary coronary artery bypass grafting surgery is performed on a beating heart to obviate complications commonly associated with prior surgical practices of transitioning a patient onto and off of a heart-lung machine that maintained circulation while the heart was in quiescent condition during construction of a coronary arterial bypass. However, performing an aortotomy and a proximal anastomosis on the aorta that is perfused with blood under pressure contribute to substantial losses of blood in the absence of temporary measures taken to curtail blood flow through the aortic hole. Side-bite and surface-oriented clamping mechanisms have been used to diminish loss of blood during the surgical procedures of punching the aortic hole and anastomosing the graft vessel, but such temporary occlusions damage the endothelium and dislodge emboli that may migrate through the circulatory system. Alternative schemes for performing an aortotomy and limiting loss of blood during the period of anastomosing a bypass graft include introducing a plug or seal at the site of the aortotomy, but such schemes commonly inhibit convenient and rapid completion of the graft anastomosis, and present other complications to be resolved following the grafting procedure.
SUMMARY OF THE INVENTION
In accordance with the method and instrumentation of the present invention, an aorto-coronary bypass graft is performed using an aortic punch including a corkscrew instrument and a hemostatic sheath that selectively delivers and positions a seal within the punched aortic hole for retention against the aortic wall under tension established by an external structure. The suture anastomosis is performed with the hemostatic seal in place and with a central stem of the seal residing near the location of the last placed stitch. A tubular removal instrument is positioned about the protruding stem to remove the seal as a tear-away strip that is pulled through the tubular removal instrument.
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Chin Albert K.
Morejohn Dwight
Taylor Charles
Fenwick & West LLP
Jackson Gary
LandOfFree
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