Prosthesis (i.e. – artificial body members) – parts thereof – or ai – Arterial prosthesis – Stent structure
Patent
1994-01-03
1995-10-10
Prebilic, Paul B.
Prosthesis (i.e., artificial body members), parts thereof, or ai
Arterial prosthesis
Stent structure
623 12, 604 8, 606151, 606153, A61F 206
Patent
active
054567149
DESCRIPTION:
BRIEF SUMMARY
TECHNICAL FIELD
This invention relates to a tubular surgical implant and has been devised particularly though not solely for use as a by-pass device and specifically as a coronary by-pass device.
BACKGROUND ART
So-called "heart by-pass" surgery is relatively common and is necessitated by blockage or partial blockage and narrowing of the coronary arteries causing ischaemia or a lack of blood supply to the heart muscle, distally. The pain felt as a result is known as angina and the result can be heart attack, death or recovery with damage to the heart muscle. The present treatment by way of heart by-pass surgery is effective but is expensive to carry cut, time consuming, and requires stopping the heart and placing the patient on a life-support artificial heart lung machine using large quantities of blood. Surgeons must then harvest leg veins or cheer arteries or both to sew into position as a by-pass from the aorta to the distal coronary artery.
It is desirable to provide a much less complicated procedure for carrying out a by-pass operation, which is not only faster and lean expensive to perform, but also results in less risk to the patient.
DISCLOSURE OF THE INVENTION
The present invention therefore provides a tubular surgical implant adapted to be joined to a wall of a vessel or hollow organ such that the implant opens into the interior of the vessel or organ, said implant comprising an open ended tube, a deformable flange at one end of the tube, a plurality of spikes extending from the flange, alongside and generally parallel to the tube, and a locking ring arranged to slide axially on the tube, the locking ring incorporating a plurality of holes aligned with and adapted to receive the spikes.
Preferably the locking ring is keyed to the tube, preventing rotation of the ring relative to the tube,
Preferably the spokes and the holes in the locking ring are provided with a locking mechanism arranged to retain the spikes within the holes when the locking ring is engaged with the spikes.
The flange may be deformable relative to the tube such that the flange may be deformed to lie against the tube for insertion into an opening in the wall of the vessel or organ.
Alternatively the flange may be deformable across one or more hinge lines in the flange, allowing parts of the flange to bend back against the tube for insertion into an open in the wall of the vessel or organ.
In one form of the invention the implant is adapted to connect two vessels or hollow organs and is provided with a flange and locking ring at both ends of the tube.
Preferably the tube and the flange are made of a plastics mesh which allows for incorporation of human tissue.
In a further aspect the invention provides a method of connecting two vessels or hollow organs by way of a surgical implant, comprising the steps of: providing a tubular surgical implant adapted to be joined to a wall of a vessel or organ such that the implant opens into the interior of the vessel or organ, said implant comprising an open ended tube, a deformable flange at one end of the tube, a plurality of spikes extending from the flange, alongside and generally parallel to the tube, and a locking ring arranged to slide axially on the tube, the locking ring incorporating a plurality of holes aligned with and adapted to receive the spikes; cutting a hole or slit in the tissue wall of the first vessel or organ, inserting the end of the tube into the hole or slit with the flange deformed, allowing or causing the flange to open behind the tissue wall, engaging the spikes through the tissue wall and sliding the locking ring on the tube until the spikes are engaged with the holes in the locking ring.
BRIEF DESCRIPTION OF DRAWINGS
Notwithstanding any other forms that may fall within its scope, one preferred form of the invention will now be described by way of example only with reference to the accompanying drawings, in which:
FIG. 1 is a diagrammatic perspective view of a tubular surgical implant according to the invention;
FIG. 2 is a detailed view of one end of the
REFERENCES:
patent: 2638901 (1953-05-01), Sugarbaker
patent: 3540451 (1970-11-01), Zeman
patent: 3713441 (1973-01-01), Thomas
patent: 4233981 (1980-11-01), Schomacher
patent: 4368736 (1983-01-01), Kaster
patent: 4523592 (1985-06-01), Daniel
patent: 5250058 (1993-10-01), Miller et al.
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