Surgery – Instruments – Suture retaining means
Patent
1995-11-30
1998-05-12
Buiz, Michael
Surgery
Instruments
Suture retaining means
606 72, 606 73, 606 75, 606104, 606139, 606148, 606213, 606215, A61B 1704
Patent
active
057498997
DESCRIPTION:
BRIEF SUMMARY
BACKGROUND OF THE INVENTION
The invention relates to an automatic intraosseous anchoring method and device.
In human restoring surgery, some lesions of the bone/soft portions are very difficult to restore and certain ones are irreversible in the case of a near-the-bone breakage.
Various techniques have been more or less successfully tried, but the results have not fulfilled the hopes.
Conventional trans-bone sutures do not permit to take into account the natural axis of the anchoring point and have the drawback of rubbing of the suture on the edge of the cortical bone, possibly causing the breakage thereof through shearing.
It is an object of the present invention to allow, in an easy manner, a positioning of an automatic anchoring element in the bone in any desired angular position.
SUMMARY OF THE INVENTION
The automatic intraosseous anchoring device according to the present invention is primarily characterized by:
a conical member with a bottom and a tip;
the conical member having an inner frusto-conical cutout extending from the bottom of the conical member toward the tip such that a conical wall is formed, wherein the cutout has a bottom surface;
the conical member having a cylindrical part connected to the bottom surface of the cutout and extending toward the bottom of the conical member;
the conical wall being slotted from the bottom of the conical member in a direction of the bottom surface of the cutout so as to form flexible blades;
the cylindrical part comprising a transverse bore;
a positioning rod with a first and a second end, the first end having means for detachably engaging the cylindrical part;
a chamber for storing at least one suture filament, the positioning rod extending through the chamber and being displaceable therein;
wherein the at least one suture filament is guided from the chamber to the cylindrical part and threaded through the transverse bore;
wherein the conical member is inserted into a bone bore with the flexible blades being transversely compressed and is anchored in the bone with the flexible blades spreading outwardly after having passed through the bone bore; and
wherein the positioning rod is detached from the cylindrical part after anchoring of the conical member in the bone.
Advantageously, the flexible blades have free ends that are flared.
The cylindrical part expediently has a length that is smaller than a depth of the cutout.
Preferably, the chamber comprises a guide tube, fixedly mounted within the chamber, for guiding the positioning rod. The chamber has an opening facing the conical member and the positioning rod extending through the opening. A washer is positioned in the opening so as to be displaceable by the positioning rod for freeing the at least one suture filament.
The guide tube comprises disks for securing thereat the at least one suture filament.
In a further embodiment of the invention, the device comprises an applicator of a semi-cylindrical hollow shape for receiving the chamber, the applicator having ends with cutouts for receiving the positioning rod, the applicator further having a handle and a lever pivotably connected to the handle, wherein the second end of the positioning rod comprises a double collar engaged by the lever.
The invention also relates to a method for anchoring an intraosseous anchoring member. The method is comprised of the following steps:
drilling a bore into the bone wall of a bone;
providing a deformable anchoring member;
threading at least one suture filament through the deformable anchoring member;
positioning the deformable anchoring member in the bore of the bone wall such that the anchoring member rests at an inner side of the bone wall and does not project to the exterior of the bone.
The anchoring member preferably comprises deformable small blades extending in a longitudinal direction of the anchoring member.
According to the invention, the method for making an intraosseous anchoring is characterized by making a hole in the periosteum of the bone, engaging a deformable retaining plug in the diaphysis or ethm
REFERENCES:
patent: 5059206 (1991-10-01), Winters
Buiz Michael
Shai Daphna
T Deux C
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