CN1137665C

CN1137665C - Locator with convex teeth for fixing guide needle

Info

Publication number: CN1137665C
Application number: CNB001141961A
Authority: CN
Inventors: 刘少喻; 杨建安
Original assignee: Individual
Current assignee: Individual
Priority date: 2000-04-12
Filing date: 2000-04-12
Publication date: 2004-02-11
Anticipated expiration: 2020-04-12
Also published as: CN1317294A

Abstract

The present invention relates to a special locator for accurately fixing a guide pin into a dentate convex bone. The present invention is composed of a base, a rotating shaft, a regulating block, a guide pin lead-in rod, fixing screws, etc., wherein the guide pin lead-in rod is arranged in the locator for the guide pin and positioned in a groove of the base and vertically penetrates through the middle point of the rotating shaft and the center position of the regulating block. The fixing position of the guide pin can be quickly and accurately determined by the linkage regulation of the regulating block and the guide pin lead-in rod to accurately fix the guide pin into the dentate convex bone. The present invention has the advantages of novel structure, safe use and convenient operation, greatly reduces operation time and prevents operating staff from the harm of x-ray at the same time.

Description

Locator with convex teeth for fixing guide needle

The present invention relates to a kind of medical surgical instrument, the particularly a kind of guide pin locator that guide pin can accurately be squeezed into Odontoid process, genus medical device product of being beneficial to.

The [odontoid fracture is a kind of serious and dangerous disease.Difficulty through preceding road row odontoid fracture internal fixation is big, and can key be earlier guide pin is squeezed into exactly the Odontoid process center.At present this class employed apparatus structure of performing the operation is owed rationally, and poor accuracy, guide pin are difficult to disposablely accurately squeeze into.Inaccurate as once beating, form via, difficulty is bigger when beating again, and when squeezing into guide pin, X-ray machine must be placed normotopia and side position to have an X-rayed repeatedly usually, and is accurate to guarantee to squeeze into.Do like this and not only prolong operating time, increased the operating field opportunities for contamination, and the office work personnel accept the X ray amount and obviously increase, human body is damaged.

The object of the present invention is to provide a kind of novel, rational in infrastructure, easy to use, operate locator with convex teeth for fixing guide needle accurately, can rapidly and accurately guide pin be squeezed in the Odontoid process bone.

The present invention is achieved by the following technical solutions.

The present invention mainly by 1. bearings, 2. turning cylinder, 3. regulating block, 4. guide pin imports bar, 5. hold-down screw and 6. box spanners are formed.In guide pin locator, be provided with the guide pin locating rod, the guide pin locating rod is positioned at the bearing groove, and vertically pass turning cylinder mid point and regulating block center, and turning cylinder is positioned at preceding 1/3 position of bearing, and hold-down screw passes the circular hole on the bearing groove two side from top to bottom.Regulating block is " ∪ " shape, and is stuck on the bearing, respectively be carved with on regulating block two lateral surface one with import the parallel scale of bar, and corresponding with the scale on bearing two lateral surface.When needs are squeezed into guide pin, under the perspective of X-ray machine side position, guide pin is penetrated the importing bar, lower edge before the tip alignment [vertebral body is regulated guide pin by regulating block and is imported bar, makes guide pin keep angle accurately.Make regulating block remain secured to the tram by tightening the importing bar, then bearing is fixed in corresponding cervical vertebral body surface, guide pin is squeezed in the Odontoid process by [vertebral body lower edge, pass fracture line to the Odontoid process point with hold-down screw.Remove localizer, keep guide pin, screw in compressive hollow screw by guide pin then, satisfy the fracture portions joint, fix, extract guide pin.

Fig. 1 is the locator with convex teeth for fixing guide needle structural representation.

Fig. 2 is the locator with convex teeth for fixing guide needle decomposing schematic representation.

Among Fig. 1,1. bearing, 2. turning cylinder, 3. regulating block, 4. guide pin imports bar, 5. hold-down screw, 6. box spanner.

Among Fig. 2,1. bearing, 2. turning cylinder, 3. regulating block, 4. guide pin imports bar, 5. hold-down screw, 6. box spanner.

Among Fig. 1, have a deep trouth in bearing 1 center, guide pin imports bar 4 by passing through in the groove, and turning cylinder 2 is positioned at bearing 1 preceding 1/3 position, and the centre has guide pin importing bar 4 vertically to pass, and hold-down screw 5 passes the circular hole on the bearing groove two side from top to bottom.Regulating block 3 is " ∪ " shape, and is stuck on the bearing 1, and its concave surface is towards bearing.Be tightened screw 5 and be screwed into vertebral body of box spanner 6, tighten up bearing 1, be convenient to guide pin and import bar 4 aligned positions, correctly squeeze into guide pin.

Among Fig. 2, guide pin imports bar 4 and is divided near section and section two parts far away.Guide pin imports bar 4 and passes turning cylinder 2, regulating block 3 centers, and hold-down screw 5 is the circle solid hopkinson bar, and the tail end of bar is hexagon, and one of point has screw thread, bearing is fixed on the relative vertebral body surface by hold-down screw 5 by the circular hole on the bearing 1.

Further specify it in conjunction with the accompanying drawings.

Localizer bearing 1 bottom slightly is arcs of recesses along major axis, when placing the vertebral body dead ahead and vertebral body prolapse arc identical substantially, the deep trouth that its center has an opening to make progress, guide pin import bar 4 to be passed through thus.The both sides of groove are sidewall, and respectively there is a circular hole that connects from top to bottom 1/3 position behind the two side, both sides from top to bottom the time each cohesion 5 °.Angle index is carved with at double side wall lateral surface rear, is convenient to the angle that clear and definite guide pin imports bar.Turning cylinder 2 is positioned at bearing 1 preceding 1/3 place, and the centre has guide pin importing bar 4 vertically to pass, and along with the rotation of axle, angle changes.Regulating block 3 is " ∪ " shape, and concave surface is towards bearing 1, and imports between bar 4 sections far away and the bearing 1 at guide pin.It is parallel that 1 liang of lateral surface of bearing center has a scale and guide pin to import bar major axis mid point, when a certain angle of scale and bearing in line the time, is guide pin importing bar angle of living in.It is hollow bar that guide pin imports bar 4, and it is divided into two sections behind regulating block 3.Nearly section is thinner, passes from turning cylinder and regulating block center position, and its far-end has external screw thread; Section far away is thicker, surperficial texturing, and its nearly section has female thread, and matches with the external screw thread of near section far-end.When section nearly, that section far away is twisted mutually is fashionable, just constitute a complete guide pin and import bar.Import bar and pass regulating block middle part, adjusting angle along with importing moving up and down of bar.When transferring to a certain proper angle, section far away to be tightened, angle can be fixed.The far away section far-end that guide pin imports bar is a hexagonal tail end, and it is further fastening with it to be inserted in box spanner.When import the bar angle suitable after, bearing is placed the vertebral body center, hold-down screw is passed circular hole on the bearing, and then is screwed into vertebral body, tighten up bearing.At this moment as squeezing into guide pin, over against being positioned at the Odontoid process center.

The present invention is skillfully constructed, and is rational in infrastructure, easy to use, safe and reliable.During operation, guide pin is only done side position x-ray fluoroscopy and is got final product after squeezing into and need only making normotopia perspective.Can shorten operating time greatly, reduce wild pollution of art and indoor occupant and accept the X ray amount, be a kind of surgical medical apparatus of a new generation.

Claims

1. locator with convex teeth for fixing guide needle of forming by bearing, turning cylinder, regulating block and hold-down screw etc., it is characterized in that being provided with in guide pin locator the guide pin locating rod, the guide pin locating rod is positioned at the bearing groove, and vertically passes rotating shaft mid point and regulating block center; Turning cylinder is positioned at preceding 1/3 position of bearing, and hold-down screw passes the circular hole on the bearing groove two side from top to bottom; Regulating block is " ∪ " shape, is stuck on the bearing, and respectively be carved with one on the regulating block two sides and import the parallel scale of bar with guide pin, and corresponding with the scale on bearing two lateral surface.

2. locator with convex teeth for fixing guide needle according to claim 1, it is characterized in that the two side of bearing upper grooves after 1/3 place one circular hole that from top to bottom connects is fully respectively arranged, the hole far-end in cohesion 5 °.

3. locator with convex teeth for fixing guide needle according to claim 1 is characterized in that it is hollow bar that guide pin imports bar, constitutes with section two parts far away by near section, and a nearly section far-end external screw thread and a section near-end female thread far away are complementary, twist a synthetic integral body.

4. locator with convex teeth for fixing guide needle according to claim 1 is characterized in that the thick other end of described hold-down screw one end is thinner, is round solid hopkinson bar, and a thinner end has screw thread, and the far-end of bar is hexagon.