CN212395029U

CN212395029U - Split joint type femoral intramedullary nail

Info

Publication number: CN212395029U
Application number: CN201922487113.XU
Authority: CN
Inventors: 杨润松; 邓毅; 姜海东
Original assignee: ORTHOPEDIC HOSPITAL OF CHONGQING TRADITIONAL CHINESE MEDICINE
Current assignee: ORTHOPEDIC HOSPITAL OF CHONGQING TRADITIONAL CHINESE MEDICINE
Priority date: 2019-12-31
Filing date: 2019-12-31
Publication date: 2021-01-26
Anticipated expiration: 2029-12-31

Abstract

The utility model discloses a concatenation formula femoral intramedullary nail, including interior public section of nail, interior female section of nail and retaining member, interior public section of nail distal end and the concatenation of interior female section of nail distal end form circumference fixed connection, the retaining member is used for carrying out axial fixity to internal public section of nail near-end and interior female section of nail near-end in the thighbone and makes interior public section of nail and interior female section of nail form the internal fixation to the thighbone. The utility model discloses a concatenation formula femoral intramedullary nail changes into the concatenation formula through the intramedullary nail that will be integrative originally, and then has guaranteed to confirm the point of inserting at thighbone both ends, more does benefit to the femoral internal fixation, and the fixed mounting of the locking screw of being convenient for reduces the injury to patient's thighbone body, shortens intramedullary nail operation installation time, alleviates patient's misery.

Description

Split joint type femoral intramedullary nail

Technical Field

The utility model relates to the technical field of medical equipment, concretely relates to concatenation formula femoral intramedullary nail.

Background

The femur is the longest and most firm long bone of the human body, its length occupies about 1/4 of the height, it supports the upper half of the human body, below the pelvis, the femur is the most important bone of the human body, also is the position of very easy injury, after the femur breaks, in order to play the role of fixing the femur, the femur is fixed by the femoral intramedullary nail.

The femoral intramedullary nail is the first choice for internal fixation of femoral shaft fracture, and the needle insertion point of the femoral intramedullary nail is positioned at the inner pear-shaped fossa of the greater trochanter of femur. The intramedullary nail is structurally provided with an intramedullary nail rod, a proximal locking screw hole is arranged at the proximal end of the intramedullary nail rod, a distal locking screw hole is arranged at the distal end of the intramedullary nail rod, the proximal and distal locking screw holes are locked through a locking screw rod, but because the femur is longer and is not in a completely straight state, after the intramedullary nail rod is inserted into the intramedullary from a rotor socket, the distal end of the intramedullary nail rod does not necessarily penetrate out from an intercondylar socket due to the randomness of the direction, the distal end of the intramedullary nail rod can possibly directly penetrate out from a femoral shaft, and the femoral shaft is harder and has poorer toughness, so that the femoral shaft is easy to fracture secondarily. The position of the far end is not reliable, so that the subsequent installation of the locking screw is very difficult, and the problem needs to be solved urgently.

Therefore, in order to solve the above problems, a need exists for a splicing type femoral intramedullary nail, which can accurately determine the specific penetrating positions of the intramedullary nail at the two ends of the femur, facilitate the fixed installation of locking screws, reduce the damage to the femoral shaft of a patient, shorten the installation time of the intramedullary nail during surgery, and relieve the pain of the patient.

SUMMERY OF THE UTILITY MODEL

In view of this, the utility model aims at overcoming the defect among the prior art, provide concatenation formula femoral intramedullary nail, can accurately confirm the intramedullary nail at the concrete position of wearing out at the thighbone both ends, the fixed mounting of the locking screw of being convenient for reduces the injury to patient's thighbone body, shortens intramedullary nail operation installation time, alleviates patient's misery.

The utility model discloses a concatenation formula femoral intramedullary nail, including interior public section of nail, interior female section of nail and retaining member, interior public section of nail distal end (keep away from the public section of interior nail and expose the one end beyond the thighbone) and the concatenation of interior female section of nail distal end (keep away from the one end beyond the thighbone of interior public section of nail and expose the thighbone) form circumference fixed connection, the retaining member is used for carrying out axial fixity to the public section of interior nail proximal end of interior nail and interior female section of nail proximal end in the thighbone and makes the public section of interior nail and interior female section of nail form the internal fixation to the thighbone, makes impaired thighbone form relatively stable firm to the thighbone healing.

Further, adopt the single degree of freedom of circumference fixed to be connected between interior nail public section and the interior female section of nail, like the key-type connection etc. can rotate in step after the circumference is fixed between interior nail public section and the interior female section of nail, but do not possess axial fixity's ability, need add axial fixity's locking screw and come to carry out axial locking to interior nail public section and interior nail female section, and then form the internal fixation to the thighbone.

Further, interior public section distal end of nail is the male head of connection of pyramid, interior female section distal end of nail be with connect the female head of connection that has a pyramid hole that public head cooperation is connected, during the public head of conical connection is convenient for guide connection is public first enters into to connect female head, and its conical surface forms a guide effect, is convenient for accomplish the concatenation of interior public section of nail and interior female section of nail better in inclosed marrow.

Further, connect public head and connect public head for regular pyramid shape and connect public head, connect female head and be the female head of regular pyramid shape hole connection, the public head of connection of regular pyramid can use arbitrary edge and the cooperation of connecting female head, has avoided the single cooperation mode of non-regular pyramid, makes the concatenation laminating face of closing of connecting public head and connecting female head to exchange.

Further, connect public head for positive four pyramid connection public head, connect female head for positive four pyramid jogged joint female head, through the atress analysis, each stupefied atress of circumference laminating of four pyramid faces is comparatively balanced, and adds the processing of also being convenient for man-hour, and it is also comparatively convenient when assembling, and circumference locking force is also stronger.

Furthermore, the retaining member is locking screw including the public locking screw who is used for locking the public section of interior nail and the female locking screw who is used for locking the female section of interior nail, and public locking screw and female locking screw pass thighbone both ends and the public section of interior nail and the proximal end (being close to and exposing the position outside the thighbone and being located the marrow) fixed connection of the female section of interior nail, and public locking screw and female locking screw are roughly perpendicular with the public female section of interior nail.

Further, the male locking screw is not less than one, the female locking screw is not less than one, and two male locking screws and two female locking screws are generally arranged as an optimal selection, so that the male section of the inner nail and the female section of the inner nail are well and stably locked in the femoral interior to form stable internal fixation.

Furthermore, the male section of the inner nail is provided with a male locking screw hole corresponding to the male locking screw, and the female section of the inner nail is provided with a female locking screw hole corresponding to the female locking screw.

Further, be threaded connection between public locking screw and the public locking screw, be threaded connection between female locking screw and the female locking screw, convenient to detach because the intramedullary nail needs demolish after the help patient's bone healing, and threaded connection can satisfy good installation and dismantlement performance.

The utility model has the advantages that: the utility model discloses a concatenation formula femoral intramedullary nail changes into the concatenation formula through the intramedullary nail that will be integrative originally, and then has guaranteed to confirm the point of inserting at thighbone both ends, more does benefit to the femoral internal fixation, and the fixed mounting of the locking screw of being convenient for reduces the injury to patient's thighbone body, shortens intramedullary nail operation installation time, alleviates patient's misery.

Drawings

The invention will be further described with reference to the following figures and examples:

fig. 1 is a schematic structural view of the present invention;

FIG. 2 is a schematic structural view of the female section of the inner nail of the present invention;

fig. 3 is the schematic structural diagram of the male section of the inner nail of the present invention.

Detailed Description

Fig. 1 is the utility model discloses a schematic structural diagram, fig. 2 is the utility model discloses an interior public section structural diagram of nail, fig. 3 is the utility model discloses an interior public section structural diagram of nail, as shown in the figure, concatenation formula femoral intramedullary nail in this embodiment includes interior public section 1 of nail, interior public section 2 of nail and retaining member, the concatenation of interior public section 1 distal end of nail (keeping away from the public section 1 of interior nail and exposing the one end beyond 3 thighbones) and the female section 2 distal end of interior nail (keeping away from the female section 2 of interior nail and exposing the one end beyond 3 thighbones) forms circumference fixed connection, the retaining member is used for carrying out axial fixity in public section 1 proximal end of interior nail and the female section 2 proximal ends of interior nail in thighbone 3 and makes interior public section 1 of nail and interior nail female section 2 form the internal fixation to thighbone 3, makes impaired thighbone 3 form relatively stable firm to thighbone 3 healing.

In this embodiment, adopt the single degree of freedom of circumference fixed to be connected between interior nail public section 1 and the female section 2 of interior nail, like the key-type connection etc. can rotate in step after the circumference is fixed between interior nail public section 1 and the female section 2 of interior nail, but do not possess the ability of axial fixity, need add axial fixity's locking screw and come to carry out axial locking to interior nail public section 1 and the female section 2 of interior nail, and then form the internal fixation to thighbone 3.

In this embodiment, the public section 1 distal end of interior nail is the male head 11 of connection of pyramid, the female section 2 distal end of interior nail be with connect the female head 21 of being connected that has a pyramid hole that public first 11 cooperations are connected, and conical male head 11 of connection is convenient for guide and is connected public head 11 and enter into and connect among the female head 21, and its conical surface forms a guide effect, is convenient for accomplish the concatenation of the public section 1 of interior nail and the female section 2 of interior nail better in inclosed marrow.

In this embodiment, connect public head 11 and connect public head 11 for regular pyramid shape, connect female head 21 and be the female head 21 of regular pyramid shape hole connection, the public head 11 of connection of regular pyramid can be with arbitrary edge and the cooperation of connecting female head 21, has avoided the single cooperation mode of non-regular pyramid, makes the concatenation laminating of connecting public head 11 and connecting female head 21 close the face and can exchange.

In this embodiment, connect public head 11 and connect public head 11 for positive four pyramid shape, connect female head 21 and be positive four pyramid hole connection female head 21, through the atress analysis, each stupefied atress of circumference laminating of four pyramid surfaces is comparatively balanced, and also be convenient for processing man-hour, and it is also comparatively convenient when assembling, and circumference locking force is also stronger.

In this embodiment, the locking member is a locking screw including a male locking screw 12 for locking the male section 1 of the internal nail and a female locking screw 22 for locking the female section 2 of the internal nail, the male locking screw 12 and the female locking screw 22 penetrate through two ends of the femur 3 and are fixedly connected with the proximal ends (close to the position exposed outside the femur 3 and located in the bone marrow) of the male section 1 of the internal nail and the female section 2 of the internal nail, and the male locking screw 12 and the female locking screw 22 are approximately perpendicular to the male and female sections of the internal nail.

In this embodiment, the number of the male locking screws 12 is not less than one, the number of the female locking screws 22 is not less than one, and two male locking screws 12 and two female locking screws 22 are preferably generally arranged to ensure that the internal nail male section 1 and the internal nail female section 2 are well and stably locked inside the femur 3 to form a stable internal fixation for the femur 3.

In this embodiment, the male section 1 of the inner nail is provided with a male locking screw hole corresponding to the male locking screw 12, and the female section 2 of the inner nail is provided with a female locking screw hole corresponding to the female locking screw 22.

In this embodiment, the male locking screw 12 is in threaded connection with the male locking screw, and the female locking screw 22 is in threaded connection with the female locking screw, so that the male locking screw is convenient to detach.

Finally, although the present invention has been described in detail with reference to the preferred embodiments, it should be understood by those skilled in the art that the present invention can be modified or replaced by other means without departing from the spirit and scope of the present invention, which should be construed as limited only by the appended claims.

Claims

1. A spliced femoral intramedullary nail is characterized in that: including public section of interior nail, female section of interior nail and retaining member, the concatenation of the public section distal end of interior nail and the female section distal end of interior nail forms circumference fixed connection, the retaining member is used for carrying out axial fixity to the public section proximal end of interior nail and the female section proximal end of interior nail in the thighbone and makes the public section of interior nail and the female section of interior nail form the internal fixation to the thighbone.

2. The split-joint intramedullary nail of claim 1, wherein: the inner nail male section is connected with the inner nail female section through a single degree of freedom which is fixed in the circumferential direction.

3. The split-joint intramedullary nail of claim 2, wherein: the public section distal end of interior nail is the male head of connection of pyramid, female section distal end of interior nail for with connect the female head of connection that has the pyramid hole of public first cooperation connection.

4. The split-joint intramedullary nail of claim 3, wherein: the male connecting head is a regular pyramid-shaped male connecting head, and the female connecting head is a regular pyramid-shaped hole female connecting head.

5. The split-joint intramedullary nail of claim 4, wherein: the male connection head is a regular quadrangular pyramid connection male head, and the female connection head is a regular quadrangular pyramid hole connection female head.

6. The split-joint intramedullary nail of claim 1, wherein: the locking piece is a locking screw rod and comprises a male locking screw rod used for locking the male section of the inner nail and a female locking screw rod used for locking the female section of the inner nail.

7. The split-joint intramedullary nail of claim 6, wherein: the male locking screw is not less than one, and the female locking screw is not less than one.

8. The split-joint intramedullary nail of claim 7, wherein: the male section of the inner nail is provided with a male locking screw hole corresponding to the male locking screw, and the female section of the inner nail is provided with a female locking screw hole corresponding to the female locking screw.

9. The split-joint intramedullary nail of claim 8, wherein: the male locking screw rod is in threaded connection with the male locking screw hole, and the female locking screw rod is in threaded connection with the female locking screw hole.