CN209203478U - A kind of femoral interlocking nail - Google Patents

Abstract

The utility model relates to a kind of femoral interlocking nails, including short nail and spike；Wherein there is included angle A between short nail fixed part and preceding bow；Wherein there is included angle B between spike fixed part and preceding bow, there are three preceding lock hole, the first pinning and the second pinnings to use cross lock structure for setting on preceding bow.Bow before the short nail distally of the utility model is bonded pulp cavity, and postoperative reduce contacts with pulp cavity inner wall, reduces patient pain；The preceding bow of spike and the angle of fixed part are 12 degree, more fitting pulp cavity, are inserted into surgical procedure smooth, reduce stress and concentrate that be that subsequent distal locking nail aims at more accurate；The distal end of spike is designed using three pinnings, is formed 15 degree of angles between the first pinning and the second pinning and is formed interlocking, is locked according to stable triangular principle relatively reliable.

Description

A kind of femoral interlocking nail

Technical field

The utility model relates to medical instruments field more particularly to a kind of femoral interlocking nails.

Background technique

The unmatched bow in short nail distal end in traditional femoral interlocking nail, nail easily contact with pulp cavity inner wall after being implanted into pulp cavity, increase Add patient pain；It is smaller that angle is turned over before spike under bow, anatomic form, which more differs greatly with chamber, is easy to produce stress concentration, no Easily far-end locking aims at during operation, and traditional spike is two nail designs, can not form cross lock.

Summary of the invention

In view of the drawbacks described above of the prior art, the purpose of the utility model is to provide a kind of easy to operate, safe and reliable Femoral interlocking nail.

The purpose of this utility model is achieved through the following technical solutions:

A kind of femoral interlocking nail, including short nail and spike；Wherein short nail length is 240mm, what short nail was internally hollow, short Following closely includes the first main part, First Transition portion, first connecting portion, bow before the first fixed part and first；First main part Diameter is greater than the diameter of the first fixed part, and First Transition portion and the first connection are arranged between the first main part and the first fixed part Portion, First Transition portion are tapers, and first connecting portion is cylinder, and diameter is identical as the diameter of the first fixed part；First main body Lock hole after portion is provided with first, end are provided with first positioning hole；First fixed part one end is connected with first connecting portion, separately One end is connected with bow before first, before having included angle A, the first fixed part to be provided with first before the first fixed part and first between bow Lock hole is provided with the first longitudinal direction groove of multiple circumferential equal parts before first outside bow；Wherein spike is internally hollow, long Nail the second main part of packet, the second transition part, second connecting portion, bow before the second fixed part and second；Second main part it is straight Diameter is greater than the diameter of the second fixed part, and the second transition part and the second connection are arranged between the second main part and the second fixed part Portion, the second transition part are tapers, and second connecting portion is cylinder, and diameter is identical as the diameter of the second fixed part；Second main body Lock hole after portion is provided with second, end are provided with second location hole；Second fixed part one end is connected with second connecting portion, separately One end is connected with bow before second, there is included angle B before the second fixed part and second between bow, and bow outside is provided with more before second The second longitudinal direction groove of a circumferential direction equal part；It is arranged on bow before second there are two lock hole before lock hole, a third before second, Lock hole setting is between lock hole, lock hole is different from the direction of lock hole before second before third before two second before third, The direction of lock hole is identical before two second, is inserted into the first pinning before third in lock hole, before two second in lock hole respectively Two the second pinnings are inserted into, the first pinning and the second pinning use cross lock structure.

Further, the included angle B is 12 degree.

Further, the cross lock structure forms angle C between the first pinning and the second pinning.

Further, the angle C is 15 degree.

Compared with the existing technology, the characteristics of the utility model and progressive as follows:

1, bow before the short nail distally of the utility model, is bonded pulp cavity, and postoperative reduce contacts with pulp cavity inner wall, reduce and suffer from Person's pain.

2, the preceding bow of the spike of the utility model and the angle of fixed part are 12 degree, more fitting pulp cavity, surgical procedure Middle insertion is smooth, and reducing stress to concentrate is that the aiming of subsequent distal locking nail is more accurate.

3, the distal end of the spike of the utility model is designed using three pinnings, and 15 degree are formed between the first pinning and the second pinning Angle forms interlocking, is locked according to stable triangular principle relatively reliable.

Detailed description of the invention

Fig. 1: short pin structure plan view；

Fig. 2: the first visual angle spike structural perspective；

Fig. 3: the second visual angle spike structural perspective.

Specific embodiment

The utility model is further described with reference to the accompanying drawings and examples.

As shown in Figure 1, a kind of femoral interlocking nail, including short nail 1 and spike 8；Wherein 1 length of short nail is 240mm, short nail 1 It is internally hollow, short nail 1 includes main part 101, transition part 102, interconnecting piece 105, fixed part 103 and preceding bow 5；Main body The diameter in portion 101 is greater than the diameter of fixed part 103, and transition part 102 and connection are arranged between main part 101 and fixed part 103 Portion 105, transition part 102 are tapers, and interconnecting piece 105 is cylinder, and interconnecting piece 105 plays the role of further transition, diameter It is identical as the diameter of fixed part 103；Main part 101 is provided with rear lock hole 2, and end is provided with location hole 104；Fixed part 103 one end are connected with interconnecting piece 105, and the other end is connected with preceding bow 5, there is included angle A between fixed part 103 and preceding bow 5, fixed Portion 103 is provided with preceding lock hole 3, and the longitudinal groove 4 of multiple circumferential equal parts is provided with outside preceding bow 5.1 distally anterior arch of short nail Arc 5 is bonded pulp cavity, and postoperative reduce contacts with pulp cavity inner wall, reduces patient pain.

As Figure 2-3, wherein spike 8 is internally hollow, spike 8 packet main part 601, transition part 602, interconnecting piece 603, fixed part 604 and preceding bow 7；The diameter of main part 1601 is greater than the diameter of fixed part 604, main part 601 and fixation Transition part 602 and interconnecting piece 603 are set between portion 604, and transition part 602 is taper, and interconnecting piece 603 is cylindrical, interconnecting piece 603 play the role of further transition, and diameter is identical as the diameter of fixed part 604；Main part 601 is provided with rear lock hole 13, end is provided with location hole 605；604 one end of fixed part is connected with interconnecting piece 603, and the other end is connected with preceding bow 7, Gu Determine have included angle B between portion 604 and preceding bow 7, the longitudinal groove 12 of multiple circumferential equal parts is provided with outside preceding bow 7；Preceding bow 7 Upper setting is there are three preceding lock hole 82, and lock hole 81 is arranged between lock hole 82 preceding after two second before 81,82, first, the Lock hole 81 is different from the direction of lock hole 82 before second before one, and the direction of lock hole 82 is identical before two second, locks before first Determine to be inserted into the first pinning 10 in hole 81, be inserted into two the second pinnings 9 before two second in lock hole 82 respectively, the first pinning 10 with Second pinning 9 uses cross lock structure 11.

Further, included angle B is 12 degree, more fitting pulp cavity, be inserted into surgical procedure it is smooth, after reducing stress and concentrate and being Continuous distal locking nail aims at more accurate.

Further, cross lock structure 11 forms angle C between the first pinning 10 and the second pinning 9 and forms interlocking, It is locked according to stable triangular principle relatively reliable.

Further, angle C is 15 degree, and femur locking effect is best.

But those of ordinary skill in the art it should be appreciated that more than embodiment be intended merely to illustrate this Utility model, and being not used as the restriction to the utility model, if in the spirit of the utility model, to Variation, the modification of the upper embodiment will all be fallen in the Claims scope of the utility model.

Claims (4)

1. a kind of femoral interlocking nail, including short nail (1) and spike (8)；It is characterized by: wherein short nail (1) length is 240mm, What short nail (1) was internally hollow, short nail (1) includes the first main part (101), First Transition portion (102), first connecting portion (105), bow (5) before the first fixed part (103) and first；The diameter of first main part (101) is greater than the first fixed part (103) First Transition portion (102) and the first company is arranged in diameter between the first main part (101) and the first fixed part (103) Socket part (105), First Transition portion (102) are tapers, and first connecting portion (105) is cylindrical, diameter and the first fixed part (103) diameter is identical；Lock hole (20) after first main part (101) is provided with first, end is provided with first positioning hole (104)；First fixed part (103) one end is connected with first connecting portion (105), and the other end is connected with bow before first (5), and first Lock hole (3) before thering is included angle A, the first fixed part (103) to be provided with first before fixed part (103) and first between bow (5), the The first longitudinal direction groove (4) of multiple circumferential equal parts is provided with before one outside bow (5)；Wherein spike (8) is internally hollow, long Follow closely (8) packet the second main part (601), the second transition part (602), second connecting portion (603), the second fixed part (604) and the Bow (7) before two；The diameter of second main part (601) be greater than the second fixed part (604) diameter, the second main part (601) with Second transition part (602) and second connecting portion (603) are set between the second fixed part (604), and the second transition part (602) is cone Shape, second connecting portion (603) are cylinders, and diameter is identical as the diameter of the second fixed part (604)；Second main part (601) Lock hole (13) after being provided with second, end are provided with second location hole (605)；Second fixed part (604) one end and second Interconnecting piece (603) is connected, and the other end is connected with bow before second (7), before the second fixed part (604) and second between bow (7) There is included angle B, is provided with the second longitudinal direction groove (12) of multiple circumferential equal parts before second outside bow (7)；Before second on bow (7) Setting is there are two lock hole (81) before lock hole (82), a third before second, and lock hole (81) setting is at two the before third Before two between lock hole (82), lock hole (81) is different from the direction of lock hole before second (82) before third, locks before two second The direction for determining hole (82) is identical, is inserted into the first pinning (10) in lock hole (81) before third, before two second in lock hole (82) It is inserted into two the second pinnings (9) respectively, the first pinning (10) and the second pinning (9) use cross lock structure (11).

2. femoral interlocking nail according to claim 1, it is characterised in that: the included angle B is 12 degree.

3. femoral interlocking nail according to claim 1 or 2, it is characterised in that: the cross lock structure (11) is first Angle C is formed between pinning (10) and the second pinning (9).

4. femoral interlocking nail according to claim 3, it is characterised in that: the angle C is 15 degree.