Supplementary vascular clamp for the tool kit of an open approach stapler
The present invention relates to medicine, in particular, to clamps used in vascular surgery for occlusion of blood vessels during a surgical operation, such as vascular clamps used in aortic aneurysm repair. The claimed supplementary vascular clamp comprises a pair of pivoting arms, each of them having a proximal end and a distal handle end. Each pivoting arm contains clamping jaws rigidly attached to a respective proximal end of this arm and shaped as a concave semi-cylindrical or semi-oval cavity. The clamping jaws are movable between the open position and closed position and define a through cylindrical or oval cavity in their closed position. The clamping jaws of the vascular clamp are also provided with a tightening means to provide intra-aortal bending of the ends of staples of an open approach stapler. The tightening means is shaped as plates or a strip of resilient material. The strip may be provided with a tensioning device. The vascular clamp may be also provided with a compensating means for correcting non-uniformity in the thickness of aorta walls. The vascular clamp may be further provided with a compensating means for correction of irregularity in wall thickness of the aorta, a first and a second sealing means for providing secure enclosure of aorta walls, as well as a means for providing regular ejection of staples.
1. A support clamp for a stapler used during connecting a prosthesis to a vessel by staples, said clamp comprising:
a) a pair of pivoting levers each of them having a proximal end and a distal handle end, each of the pivoting levers is provided with a C-shaped clamping jaw associated with a corresponding proximal end, wherein, during pivoting of the levers their clamping jaws are displaceable between an open position and a closed position, such that the vessel can be respectively released or embraced by the clamping jaws without occluding the vessel;
b) a tightening means for providing a tight contact between the clamping jaws and an outer surface of the vessel and abutting the vessel towards the stapler to enable bending of a staple end during connecting the prosthesis to an inner surface of the vessel;
c) a fastener means for attaching the tightening means to a corresponding clamping jaw, and
d) a compensating means for compensating irregularity in thickness of the walls of the vessel.
2. A clamp according to claim 1 ,
wherein said levers are provided with a locking means to secure the levers in a position.
3. A clamp according to claim 1 ,
wherein said compensating means is configured as a protrusion made on one of the clamping jaws and a corresponding depression made on a second clamping jaw.
4. A clamp according to claim 1 ,
wherein each of the clamping jaws is provided with a concave inner surface and an outer surface, which is substantially parallel to the inner surface.
5. A clamp according to claim 1 ,
wherein the clamping jaws are releasably attached to the pivoting levers of a conventional vascular clamp.
6. A clamp according to claim 1 , wherein the tightening means is configured as pads made of a resilient material, each pad being attached to a corresponding inner surface of a corresponding clamping jaw.
7. A supplementary vascular clamp according to claim 1 , wherein said tightening means for providing intra-aortal bending of staple ends of the open approach stapler and secure enclosure of aorta walls by the clamping jaws contains at least one strip from resilient material, substantially rubber or plastic, which is attached by each of its ends to the inner semi-cylindrical surface of a corresponding clamping jaw.
8. A supplementary vascular clamp according to claim 7 , wherein said tightening means for providing intra-aortal bending of staple ends of the open approach stapler and secure enclosure of aorta walls by the clamping jaws, containing at least one strip from resilient material substantially rubber or plastic, is configured to adjust the force of occlusion of a blood vessel outer surface.
9. A supplementary vascular clamp according to claim 8 , wherein said tightening means for providing intra-aortal bending of staple ends of the open approach stapler and secure enclosure of aorta walls by the clamping jaws containing at least one strip from resilient material, substantially plastic, is configured to adjust the force of occlusion of a blood vessel outer surface via a mechanism for tensioning said strip.
10. A supplementary vascular clamp according to claim 1 , wherein said compensating means for correcting irregularity in thickness of aorta walls substantially contains a ridge at the free end of one of the clamping jaws and a valley opposite to this ridge at a corresponding free end of the other clamping jaw.