Adjustable ringprosthesis
First Claim
1. Adjustable ringprosthesis for surgical correction of heart valve malfunction comprising:
- a tubular plastic sleeve capable of being sewn into a heat valve ring of the mitral or the tricuspidal valve;
a spring ribbon coiled within said sleeve to form a ring and having an end coiled internally in the ring which end has a toothed edge and is circumferentially shiftable;
an adjusting device for shifting said shiftable spring end, mounted on the externally coiled part of said ribbon astride an edge thereof, into which device the forward end of an adjusting tool can be inserted and having a screw rotatably held for being turned by said adjusting tool in a screw guide structure mountable astride an edge of said spring ribbon and having a guide orifice for introduction of a screw-driving tool, and in which device said internally coiled end of said spring ribbon engages said toothed edge into the threads of said screw;
a connection piece (51) extending in tubular fashion from said screw guide structure so as to extend said guide orifice (47) thereof and having a configuration for detachable coupling with a guide tube (53) for the introduction of said adjusting tool (48), said screw guide structure having a slot into which said toothed edge of said spring ribbon enters and through which said screw has engagement with said toothed edge of said spring ribbon, anda thrust bearing (66) for said screw (15) provided in said screw guide structure in the end thereof opposite said guide orifice (47).
1 Assignment
0 Petitions
Accused Products
Abstract
An adjustable ringprosthesis designed particularly for being sewed onto the ring of the mitral valve or tricuspidal valve of a living heart uses a spring ribbon coiled with an overlap of about a half turn covered in a woven, braided or knitted cuff of a suitable synthetic fiber that can be sewed into place. An adjusting device (40) is fixedly positioned on a portion of the spring ribbon which is internally overlapped by an end portion which carries teeth so as to form a rack which can be driven by a screw (15) in the adjusting device for varying the diameter of the ring. The adjusting device is operated by an adjusting tool, the front end of which is guided into a screw-head socket (50) for turning the screw to change the ring diameter. The shaft of the tool is guided by a tube through a connecting piece (51) onto which the guide tube is screwed, and from which it can be unscrewed and removed when there is no further need for post-operative adjustment of the prosthesis.
688 Citations
11 Claims
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1. Adjustable ringprosthesis for surgical correction of heart valve malfunction comprising:
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a tubular plastic sleeve capable of being sewn into a heat valve ring of the mitral or the tricuspidal valve; a spring ribbon coiled within said sleeve to form a ring and having an end coiled internally in the ring which end has a toothed edge and is circumferentially shiftable; an adjusting device for shifting said shiftable spring end, mounted on the externally coiled part of said ribbon astride an edge thereof, into which device the forward end of an adjusting tool can be inserted and having a screw rotatably held for being turned by said adjusting tool in a screw guide structure mountable astride an edge of said spring ribbon and having a guide orifice for introduction of a screw-driving tool, and in which device said internally coiled end of said spring ribbon engages said toothed edge into the threads of said screw; a connection piece (51) extending in tubular fashion from said screw guide structure so as to extend said guide orifice (47) thereof and having a configuration for detachable coupling with a guide tube (53) for the introduction of said adjusting tool (48), said screw guide structure having a slot into which said toothed edge of said spring ribbon enters and through which said screw has engagement with said toothed edge of said spring ribbon, and a thrust bearing (66) for said screw (15) provided in said screw guide structure in the end thereof opposite said guide orifice (47). - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11)
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Specification