CN203369956U

CN203369956U - Correcting and guiding device for distal lock pin of femoral intramedullary nail

Info

Publication number: CN203369956U
Application number: CN201320296786.7U
Authority: CN
Inventors: 刘印文; 郑昱新; 顾新丰; 高宁阳
Original assignee: Shuguang Hospital Affiliated to Shanghai University of TCM
Current assignee: Shuguang Hospital Affiliated to Shanghai University of TCM
Priority date: 2013-05-28
Filing date: 2013-05-28
Publication date: 2014-01-01
Anticipated expiration: 2023-05-28

Abstract

The utility model discloses a correcting and guiding device for a distal lock pin of a femoral intramedullary nail. The correcting and guiding device is in a regular hexagonal prism shape, two parallel bottom faces are regular hexagons, and six lateral edges are all perpendicular to the bottom faces. Central guide holes are formed in the centers of the two bottom faces, and six peripheral guide holes are formed in the edge of each bottom face to surround the central guide hole. When the correcting and guiding device is applied to surgery, a missed drill bit is sleeved with the central guide holes of the correcting and guiding device, the corresponding guide holes are selected in the correcting and guiding device according to the diameter of the intramedullary nail, the connecting line of the two guide holes are perpendicular to the long shaft of the intramedullary nail, the intramedullary nail is driven into drill bit along the guide holes, that is, the intramedullary nail can enter a intramedullary nail lock hole accurately at one time, a locating rod does not need to be adjusted again, and operations do not need to be repeated. The correcting and guiding device is simple in operation, accurate in locating, convenient to use and obvious in effect.

Description

Femoral interlocking nail distal locking nail correcting error guidance device

Technical field

This utility model relates to medical instruments field, is specifically related to for the femoral interlocking nail stationary device, relates in particular to a kind of femoral interlocking nail distal locking nail correcting error guidance device.

Background technology

Intramedullary pin is the goldstandard of fixed length shaft fracture, is the most frequently used method for the treatment of fracture of shaft of femur.In fracture of shaft of femur intramedullary pin fixing operation, common technical barrier is that distal locking nail is inserted difficulty, and its incidence rate of bibliographical information can be up to 29.1%, and in domestic literature, this ratio is 18-29%.Inaccurate because of Far end sighting device, can't disposablely accurately lock, need readjust locating rod, repeatedly repeat several times this step, sometimes even be forced to change into hand operation.These all need repeatedly to use C type arm X-ray machine perspective, extend operating time, increase amount of bleeding, have also increased the weight of doctor and patient's radiological detriment.

The utility model content

The technical problems to be solved in the utility model is to provide a kind of femoral interlocking nail distal locking nail correcting error guidance device, in order to solve femoral interlocking nail stationary remote pinning, inserts difficulty.

For solving the problems of the technologies described above, this utility model provides a kind of femoral interlocking nail distal locking nail correcting error guidance device, and this correcting error guidance device is positive hexagon, and two parallel bottom surfaces are regular hexagon, and six inclines are all vertical with bottom surface; The center of described two bottom surfaces is provided with 1 center guide hole, and the edge of these two bottom surfaces is provided with 6 periphery guide holes round the center guide hole.

Further, the distance of described center guide hole to 6 a periphery guide hole is respectively 5.5mm, 6.0mm, 6.5mm, 7.0mm, 7.5mm, 8.0mm, and correspondence is applied to the intramedullary pin that diameter is 7mm, 8mm, 9mm, 10mm, 11mm, 12mm respectively.

Further, the periphery guide hole position of described correcting error guidance device sidewall is labelling 7,8,9,10,11,12 respectively, corresponds respectively to the intramedullary pin that diameter is 7mm, 8mm, 9mm, 10mm, 11mm, 12mm.

Further, the length of described incline is 3cm.

Further, described 1 center guide hole is fully parallel with the duct that 6 periphery guide holes form.

The beneficial effects of the utility model are: this utility model femoral interlocking nail distal locking nail correcting error guidance device can solve femoral interlocking nail stationary remote pinning and insert difficulty.During the operation application, by the central guiding borehole jack of correcting error guidance device on the drill bit trained off, select corresponding periphery guide hole on the correcting error guidance device according to the intramedullary pin diameter, make the line of these two guide holes (the periphery guide hole of selection and center guide hole) vertical with the intramedullary pin major axis, squeeze into drill bit along this periphery guide hole, get final product the disposable locking of intramedullary nail that accurately enters, without readjusting locating rod, repetitive operation repeatedly.This utility model is simple to operate, and accurate positioning is easy to use, successful.

The accompanying drawing explanation

Below in conjunction with the drawings and specific embodiments, this utility model is described in further detail:

Fig. 1 is drill bit and intramedullary pin position relationship schematic diagram;

Fig. 2 A and Fig. 2 B are the structural representations of this utility model femoral interlocking nail distal locking nail correcting error guidance device; Wherein, Fig. 2 A is the front schematic view of this utility model femoral interlocking nail distal locking nail correcting error guidance device; Fig. 2 B is the perspective view of this utility model femoral interlocking nail distal locking nail correcting error guidance device.

In figure, description of reference numerals is as follows:

The 1st, drill bit; The 2nd, lockhole; The 3rd, intramedullary pin; The 4th, the center guide hole; The 5th, the periphery guide hole.

The specific embodiment

As shown in Figure 1, design principle of the present utility model is as follows:

1. insert distal locking nail, drilling 1 o'clock, drill bit 1 is to pass through from lockhole 2 centers of intramedullary pin 3 under normal circumstances.If locating rod slightly has deviation, can cause drill bit 1 to fail to pass through from lockhole 2 centers of intramedullary pin 3, but pass through from intramedullary pin 3 the place aheads or rear, be all to be close to intramedullary pin 3 the place aheads or rear is passed through usually, drill bit 1 and intramedullary pin 3 relations are as shown in Figure 1.

2. drill bit 1 central point is to the calculating of the distance (being the length of the straight line A in Fig. 1) of lockhole 2 central points of intramedullary pin 3:

Bit central is put to the distance of locking of intramedullary nail central point and is equaled (intramedullary pin diameter+bit diameter) ÷ 2.And the diameter of each apparatus company drill bit is basic identical, be 4mm.Therefore, bit central is put to the distance of locking of intramedullary nail central point and the corresponding relation of intramedullary pin diameter as following table 1:

Table 1

3. according to the data of above-mentioned table 1, we have designed femoral interlocking nail distal locking nail correcting error guidance device, and as shown in Figure 2 A and 2 B, wherein Fig. 2 A is the front schematic view of this utility model femoral interlocking nail distal locking nail correcting error guidance device; Fig. 2 B is the perspective view of femoral interlocking nail distal locking nail correcting error guidance device.

The technical parameter of this utility model femoral interlocking nail distal locking nail correcting error guidance device is as follows:

Material: hardwood (can adopt the hardwood of doing screwdriver handle)

Profile: as shown in Figure 2 A and 2 B, (two parallel bottom surfaces are regular hexagon to the positive hexagon that incline length is 3cm, and six incline is all vertical with bottom surface), the center of two bottom surfaces is provided with 1 center guide hole 4, it is fully parallel round the duct of 4,7 guide holes formation of center guide hole that the edge of bottom surface is provided with 6 periphery guide holes 5.The distance of 4 to 6 periphery guide holes 5 of center guide hole is respectively 5.5mm, 6.0mm, 6.5mm, 7.0mm, 7.5mm, 8.0mm, can correspondingly respectively be applied to the intramedullary pin that diameter is 7mm, 8mm, 9mm, 10mm, 11mm, 12mm, and 7,8,9,10,11,12 these 6 numerals (correspondence is applied to the intramedullary pin that diameter is 7mm, 8mm, 9mm, 10mm, 11mm, 12mm respectively) are marked on to periphery guide hole 5 positions that the guider sidewall is corresponding.

As shown in Fig. 1 and Fig. 2 A and Fig. 2 B, this utility model femoral interlocking nail distal locking nail correcting error guidance device using method:

During the operation application, correcting error guidance Qi center guide hole 4 is enclosed within on the drill bit 1 trained off, select corresponding periphery guide hole 5 according to the diameter of intramedullary pin 3 on the correcting error guidance device, make the line of these two guide holes (the periphery guide hole 5 of selection and center guide hole 4) vertical with intramedullary pin 3 major axis, squeeze into drill bit along this periphery guide hole 5, can accurately enter locking of intramedullary nail 2.

Claims

1. a femoral interlocking nail distal locking nail correcting error guidance device, it is characterized in that: this correcting error guidance device is positive hexagon, and two parallel bottom surfaces are regular hexagon, and six inclines are all vertical with bottom surface; The center of described two bottom surfaces is provided with 1 center guide hole, and the edge of these two bottom surfaces is provided with 6 periphery guide holes round the center guide hole.

2. correcting error guidance device according to claim 1, it is characterized in that: the distance of described center guide hole to 6 a periphery guide hole is respectively 5.5mm, 6.0mm, 6.5mm, 7.0mm, 7.5mm, 8.0mm, and correspondence is applied to the intramedullary pin that diameter is 7mm, 8mm, 9mm, 10mm, 11mm, 12mm respectively.

3. correcting error guidance device according to claim 1, it is characterized in that: the length of described incline is 3cm.

4. correcting error guidance device according to claim 1 is characterized in that: described 1 center guide hole is fully parallel with the duct that 6 periphery guide holes form.