CN2469895Y

CN2469895Y - Sneak-dilating decompressor for head of femur

Info

Publication number: CN2469895Y
Application number: CN 01240845
Authority: CN
Inventors: 王玉山
Original assignee: Individual
Current assignee: Individual
Priority date: 2001-03-21
Filing date: 2001-03-21
Publication date: 2002-01-09
Anticipated expiration: 2011-03-21

Abstract

Disclosed is a femoral head hiding and expanding pressure reducer having a propulsion hollow shaft, the front end of the propulsion hollow shaft has a through hole, the through hole is hinge-connected with a blade, a sliding rod regulating the stretching angle of the blade is arranged in the propulsion hollow shaft, the back end of the propulsion hollow shaft is provided with a nut, the sliding rod is connected with a screw matching with the nut, the other end of the screw is fixed on a feed regulating cap, the utility model has advantages that the dead bone in the head according to the putrescence condition of the femoral head, the cutting diameter can be up to 30mm, and the surface structure of the femoral head will not be damaged, the arthrosis need not be cut, the diameter of the cut hole on the greater trochanter is small, which has little injury to the patient, and the utility model provides a practical and feasible method for curing the putrescence of the femoral head.

Description

The femoral head expansion decompressor that moves under water

This utility model belongs to a kind of medical apparatus and instruments, particularly a kind of femoral head expansion decompressor that moves under water.

Ischemic necrosis of femoral head is a kind of common disease, at present, the sickness rate of this disease is the trend that rises year by year, and, because its disability rate height is mainly in the adolescent again, so, press for and take practical measures effectively to treat, femoral head is kept or delay to carry out time of prosthetic replacement.Current, the Therapeutic Method that adopts in clinical practice is a lot, but because of its indication and curative effect all are not quite similar, still do not have at present a kind of everybody generally acknowledge and be suitable for all patients' definite Therapeutic Method.For I, II option share head necrosis, at present, the prefered method of generally acknowledging is to adopt the core decompression art both at home and abroad.The core decompression art has two kinds of operation methods at present, and the one, through greater trochanter approach trepan, brill, the internal drilling of osseous pin wardrobe, the 2nd, cut joint wardrobe cervical region decompression by fenestration.The advantage of first kind of operation method is, the patient damaged little, but it is insufficient to reduce pressure, and sequestrum can not be removed, and the heat production meeting causes marrow road Peripheral Bone necrocytosis during boring.Though second kind of operation method can be removed the sequestrum in the femoral head, and be bigger to patient's damage, and can destroy capital surface texture, increase the weight of destruction to femoral head blood fortune.And, implement this Therapeutic Method and still do not have effective specific purpose tool at present, can only adopt trepan, brill, chisel, these instruments of osseous pin to undergo surgery, therefore, the time of operation, workload long, the doctor was big, especially to III option share head necrosis, was unsuitable for implementing this operation.

The purpose of this utility model is to overcome above-mentioned the deficiencies in the prior art, at capital features of shape, provides a kind of and can remove sequestrum in the femoral head and the patient is damaged femoral head little, that carry out through the greater trochanter expansion decompressor that moves under water.

This utility model is achieved in that

It has one to advance hollow axle, at the front end that advances hollow axle a through hole is arranged, be hinged with blade in the through hole, a slide bar of regulating the blade opening angle is housed in advancing hollow axle, in the rear end that advances hollow axle nut is housed, on slide bar, be connected with the screw rod that matches with nut, the other end of screw rod is fixed on feeding and adjusts on the medicated cap, utilizing feeding to adjust the moving screw rod of hatband rotates, make screw rod when rotating, axial-movement along advancing hollow axle drives the forward and backward motion of slide bar simultaneously, thus the opening angle of control blade.

Advantage of the present utility model is, the blade that can regulate opening angle is installed in advancing hollow axle, thereby, can be according to the sequestrum in the situation excision head of femur head necrosis, its excision diameter can reach 30 millimeters, and visual location of necrosis is carried out selective ablation, and, need not cut the joint, not destroy the femoral head surface texture, the marrow channel hole diameter of opening through greater trochanter is also very little, damage to the patient is little, 2/3rds bone also can be done bone grafting outside the marrow road, and the operation indication can be loosened to III option share head necrosis, is II, III option share head necrosis provides practicable Therapeutic Method.

Description of drawings:

Fig. 1 is a structural representation of the present utility model;

Fig. 2 is the vertical view of Fig. 1;

Fig. 3 is a user mode sketch map of the present utility model.

Provide embodiment of the present utility model below in conjunction with accompanying drawing:

As depicted in figs. 1 and 2, this utility model has one to advance hollow axle 5, advances the front end of hollow axle 5 to seal with a circular slab, to improve its intensity; At the front end that advances hollow axle 5 through hole is arranged, this through hole is the rectangle slotted hole, is hinged with blade 1 and blade 2 with bearing pin 3 in through hole, and blade 1 and blade 2 are that the center can be swung within the specific limits with bearing pin 3; A slide bar 6 of regulating the blade opening angle is housed in advancing hollow axle 5, the cross section of slide bar 6 is square, its head is pointed, when the point of slide bar 6 heads is mobile between blade 1 and blade 2, the opening angle of blade 1 and blade 2 will change, thereby realizes adjusting the purpose of excision diameter; In advancing hollow axle 5, also has a guide ring 4, guide ring 4 setting-ins also are fixed in the propelling hollow axle 5, the endoporus of guide ring 4 is a square through hole, slide bar 6 is installed in the guide ring 4, it can not be rotated, can only move along the axis direction that advances hollow axle 5 is forward and backward, thereby utilize the pointed part blade 1 of slide bar 6 front ends and the opening angle of blade 2 to regulate; In the rear end that advances hollow axle 5 nut 10 is housed, both are fixed together; Be connected with the screw rod 7 that matches with nut 10 on slide bar 6, screw rod 7 flexibly connects with slide bar 6, can rotate mutually between the two, but must synchronously forward and backwardly move, thereby drive slide bar 6 forward and backward moving in advancing hollow axle 5; In advancing hollow axle 5, also have a bearing 8, make screw rod 7 location; In the rear end that advances hollow axle 5 feeding is housed and adjusts medicated cap 11, the other end of screw rod 7 is fixed on feeding by bearing pin 12 and adjusts on the medicated cap 11, utilize feeding to adjust medicated cap 11 and drive screw rod 7 rotations, screw rod 7 drives slide bar 6 again and moves, thereby realizes adjusting the purpose of blade opening angle; Adjust medicated cap 11 and advance the place of interconnecting of hollow axle 5 also to indicate scale respectively in feeding,, understand the excision diameter that blade 1 and blade 2 form in the process of rotation so that in the process of operation, grasp the opening angle of blade 1 and blade 2; In the rear end that advances hollow axle 5 handle 9 is housed also, is convenient to rotate whole apparatus, increase work efficiency with hands.

During use, to open the marrow channel hole of a through femoral head 14 earlier at femoral head greater trochanter 13 places with trepan, then, front end of the present utility model is extend in the marrow channel hole, as shown in Figure 3, and under the cooperation of X-ray or other fluoroscopic apparatus, the limit swivel feeding is adjusted medicated cap 11, and the limit rotates whole apparatus by hand, progressively that sequestrectomy is clean, after sequestrum was removed totally, swivel feeding was adjusted medicated cap 11, allows the point of slide bar 6 heads withdraw between blade 1 and blade 2, at this moment, outwards pull advances hollow axle 5, and blade 1 and blade 2 will auto-closings, and apparatus can take out.

Claims

1, a kind of femoral head expansion decompressor that moves under water, it is characterized in that, it has one to advance hollow axle, at the front end that advances hollow axle a through hole is arranged, be hinged with blade in the through hole, a slide bar of regulating the blade opening angle is housed in advancing hollow axle, nut is housed in the rear end that advances hollow axle, be connected with the screw rod that matches with nut on slide bar, the other end of screw rod is fixed on feeding and adjusts on the medicated cap.

2, the femoral head according to claim 1 expansion decompressor that moves under water is characterized in that, in the rear end that advances hollow axle a handle is housed also.