Surgery – Truss – Pad
Patent
1986-08-04
1988-03-22
Truluck, Dalton L.
Surgery
Truss
Pad
128344, 1283481, 623 1, 623 12, 604 53, 604271, A61M 2500
Patent
active
047321520
DESCRIPTION:
BRIEF SUMMARY
TECHNICAL AREA
The invention relates to a device for transluminal implantation of a substantially tubular, expandable and preferably self-fixing implant, such as a graft or prosthesis.
BACKGROUND
In known devices of the type indicated above for insertion of expandable prostheses in for example a blood vessel or other narrow passage there are serious drawbacks. One such drawback consists in the fact that a gripping means embracing the prosthesis during the insertion may damage the wall of the vessel when the gripping means is widened in order to release the prosthesis. If then the gripping means is of the ejector type the friction for example between the prosthesis and the gripping means may make the ejection of the prosthesis difficult or result in damage of the prosthesis. If the prosthesis is radially compressed during the insertion to be expanded upon release the friction will be accentuated. Attempts to reduce the friction by using a lubricant exposed to the prosthesis or the wall of the passage may be inconvenient in many environments. In many cases the requirement for space of the gripping means is disturbing, and frequently the gripping means and its manoeuvring elements are of a complex nature with concomitant risk for malfunction.
The said inconveniences are particularly present when implanting a so called graft prosthesis into a vein, an artery or the like. By expandable prosthesis there is meant a tubular means forming for example a supplement to an artery, vein or the like, said prosthesis being inserted in a radially compressed state and allowed to expand radially at the location of implantation.
One object of the invention is to provide for a device of the type introductorily indicated, said device alleviating or eliminating at least some of the said inconveniences thus having the corresponding advantages in comparison with known devices.
Another advantage is to provide for a device enabling transluminal implantation of expansible prostheses of small diameter such as to be implantable by percutaneous insertion.
Still another object of the invention is to provide for a device comprising inflatable balloon means for widening the lumen before implanting the prosthesis.
Further objects and advantages of the device of the invention will be clear from the following specification or will be obvious to the skilled artisan when confronted with same.
CHARACTERIZATION OF THE INVENTION
The invention provides for a device particularly useful for transluminal implantation of an expandable self-fixing prosthesis. The device of the invention comprises in combination such prosthesis and concentric therewith a flexible probe with means for maintaining said prosthesis in a radially contracted state and for releasing same at the desired location of a lumen, characterized thereby that said means for maintaining and releasing the prosthesis comprises a flexible hose surrounding said probe, one end of said hose being connected to the probe, and the hose being folded inside itself to form a double-walled section radially surrounding the prosthesis and preferably substantially coextensive therewith, the latter being releasable by axial relative movement of the ends of the hose.
Said one end of the hose is preferably the end of the inner wall of the double-walled hose section radially seen. By this arrangement there will be no friction between the prosthesis and the hose under the release operation since the hose will be rolled off from the prosthesis.
The prosthesis is substantially tubular and is positioned to radially surround the probe, the double-walled hose section surrounding the prosthesis at the time of insertion. The probe serves the purpose of guiding the prosthesis under the insertion operation. The probe, which suitably is flexible and may consist of a suitable material, such as a polymer, can have an axially through-going channel through which fluid, for example a contrast liquid, can be introduced to the said location in the area of the forward end of the probe.
The double-walled hose section is
REFERENCES:
patent: 3589356 (1971-06-01), Silverman
patent: 3911927 (1975-10-01), Rich et al.
patent: 4560374 (1985-12-01), Hammerslag
patent: 4665918 (1987-05-01), Garza et al.
patent: 4681110 (1987-07-01), Wiktor
Imbert Christian
Wallsten Hans I.
Medinvent S.A.
Truluck Dalton L.
Wilkens F.
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