JP2000189438A - Guide outside marrow for side-fastening needle into marrow - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a guide outside the marrow for easily fastening needles into the marrow for fracture of a long tubular bone. SOLUTION: Guide sections 13 for side-fastening for inserting a plurality of drills and guide wires at the same time are provided to easily side-fasten. A probability for inserting the drills and guide wires for side-fastening is raised to shorten a time for operation and to prevent roentogen radiation exposure.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a means for preventing a fractured portion from being caught by an intramedullary nail in a long bone fracture operation. Used as a guide to fix the nail laterally.

[0002]

2. Description of the Related Art In this type of orthopedic surgery, an intramedullary nail and an extramedullary guide having a shape as shown in FIG.

[0003] As shown in FIG. 2, an intramedullary nail and a lateral fixation of a long skeletal fracture are performed by inserting an intramedullary nail 3 into the long skeletal bone 2 so as to bridge the fractured part 4. The screw 5 is passed through the hole 6 in the intramedullary nail 3, which is usually hollow, and then fixed to the bone through the hole 7 on the opposite side in order to prevent the fractured portion 4 from turning or opening. Perform surgery.

At this time, an extramedullary guide 1 is used as shown in FIG. 3 so that the screw 5 can be easily inserted. The extramedullary guide 1 is attached to the intramedullary nail 3 and has a lateral stopper guide portion 8 at one end for facilitating the screw 5 to pass through the holes 6 and 7. The side stopper guide portion 8 has a hollow portion 9. The procedure of inserting the screw 5 after passing a drill or a guide wire through the hollow portion 9 facilitates the insertion of the screw 5.

[0005]

The extramedullary guide 1 has the following problems that need to be solved.

As described above, the extramedullary guide 1 seems to allow the screw 5 to be easily inserted at first glance, but in reality, the intramedullary nail 3 is deformed due to individual differences in the shape of the bone, There is play in the connection portion 10 of the intramedullary nail 3 or deformation of the drill or guide wire itself when inserting the drill or guide wire, which causes an error due to the deformation of the bone or the distortion of the muscle. In some cases, it could not be inserted. Since this process is performed under X-ray fluoroscopy, the amount of exposure of the patient and medical personnel to X-rays has been increased.

[0007] A large amount of X-ray exposure poses a problem in terms of biological toxicity.

Accordingly, the present invention provides an extramedullary guide for an intramedullary nail, which solves the above-mentioned problems of the prior art and in which a lateral locking screw can be easily inserted.

[0009]

The basic structure of the extramedullary guide according to the present invention comprises a connecting portion 11 connected to the intramedullary nail and a parallel portion running outside the skin almost in parallel with the intramedullary nail axis as in the prior art. 1
2. It is composed of a lateral stop guide 13 for passing a drill and a guide wire for drilling a hole for inserting a lateral stop by a screw or the like into a bone. There are a plurality of guide holes 14 for passing a guide wire, and the structure is such that a plurality of drills and guide wires can be inserted simultaneously. This improves the insertion probability of the side stop drills and guide wires, and thus the screws, by the amount that can be inserted at the same time.

[0010] This makes it easier to insert the side-stopping screw used for the intramedullary nail, thereby reducing the amount of X-ray exposure.

[0011]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, an intramedullary nail and a lateral stop screw according to the present invention will be described in detail based on preferred embodiments of the present invention.

As shown in FIG. 4, the extramedullary guide of the first embodiment includes a connecting portion 11 connected to the intramedullary nail, a parallel portion 12 running outside the skin almost in parallel with the intramedullary nail, screws, and the like. It is composed of a side stop guide portion 13 for passing a drill and a guide wire in order to make a hole for inserting the side stop portion in the bone, but for passing a drill and a guide wire of the side stop guide portion 13. There are a plurality of guide holes 14. The guide hole 14 is preferably long enough to provide directionality, but may have a structure in which the plate simply has a plurality of holes.

In the second embodiment shown in FIG. 5, when a drill or a guide wire for inserting a lateral stopper by a screw or the like is inserted at an optimum position, the drill or the guide wire 15 is inserted.
There is a fastening portion 16 that can be attached to the vehicle. When it is desired to pass a drill or a guide wire through the holes 17 and 18 for stopping the side, the guide or the side guide 19 (which may be the same as the side guide 13) is used to insert the drill or the guide wire. At this time, the side stop guide part 19
Since both ends of the connecting portion 11 and the drill and the guide wire 15 are bridged, the drill and the guide wire can be easily inserted into the holes 17 and 18.

It should be noted that the present invention is not limited to the above-described embodiment, but can adopt various modifications within the scope of the gist.

[0015]

As is apparent from the above description, the insertion of a drill or guide wire using the extramedullary guide of the conventional lateral stop screw of an intramedullary nail sometimes took time because of the single insertion. In contrast, according to the present invention, since a plurality of simultaneous insertions can be performed, the insertion can be performed more stochastically, and therefore, it is possible to insert a side stop screw that is less likely to be exposed to X-rays in a short time. As a result, the problem of biotoxicity due to a large amount of X-ray exposure can be better solved.

[Brief description of the drawings]

FIG. 1 is an explanatory diagram of a conventional intramedullary nail lateral stop extramedullary guide.

FIG. 2 is an explanatory view of a method of fixing an intramedullary nail and a lateral stopper for a long skeletal fracture.

FIG. 3 is an explanatory view of a conventional intramedullary nail lateral stop extramedullary guide.

FIG. 4 is an explanatory view of an intramedullary nail lateral stop extramedullary guide according to the first embodiment of the present invention.

FIG. 5 is an explanatory view of a second embodiment of the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Extramedullary guide 2 Long skeletal bone 3 Intramedullary nail 4 Fracture part 5 Screw 6 Hole 7 Hole 8 Side stop guide part 9 Hollow part 10 Connection part 11 Connection part 12 Parallel part 13 Side stop guide part 14 Guide hole 15 Drill and guide Wire 16 Fastening part 17 Hole 18 Hole 19 Side stop guide

Claims (3)

[Claims] 1. An extramedullary guide for inserting a lateral stop by a screw or the like for the purpose of preventing rotation of an intramedullary nail used as an internal fixation device for a long bone fracture. The extramedullary guide has a connection part to be attached to one end of the intramedullary nail, is connected to a parallel part running almost parallel to the axis of the intramedullary nail outside the skin, and has a hole for inserting a side stopper by a screw or the like. It is composed of a side stop guide part for passing a drill and a guide wire for drilling, but there are multiple guide holes of this side stop guide part A structure that allows multiple drills and guide wires to be inserted simultaneously into the bone. The guide hole need not be long enough. Since there is not necessarily a single side stop portion by a screw or the like, a plurality of side stop guide portions may be provided. When there are a plurality of side stop guide portions, the side stop guide portions may include only one guide hole. 2. The extramedullary guide according to claim 1, wherein a drill or a guide wire is inserted into an optimal position to make a hole for inserting a lateral stopper by a screw or the like into a bone. There is a fastening part that can be attached to a drill or a guide wire, and this makes it easier to insert the side stopper with another screw or the like. This fastening portion is fastened to the parallel portion and the side stopper guide portion described in claim 1. 3. An extramedullary guide according to claim 1, wherein said extramedullary guide has no connecting part or parallel part.