CN2638681Y

CN2638681Y - Multi-screw location device for neck of femur

Info

Publication number: CN2638681Y
Application number: CN 03248100
Authority: CN
Inventors: 李康华; 魏波; 李光灿; 梁捷予
Original assignee: Xiangya Hospital of Central South University
Current assignee: Xiangya Hospital of Central South University
Priority date: 2003-06-24
Filing date: 2003-06-24
Publication date: 2004-09-08
Anticipated expiration: 2013-06-24

Abstract

The utility model relates to a multi-screw femur neck fixing device which includes a localizer and a positioning guide pin and is characterized in: the localizer is provided with 2 or 3 cross-set screw inserting holes and no less than three and no more than six guide pins inserting holes and the contacting face between the localizer and the femur neck is a concave which keeps close to the outer surface of the femur neck; the guide pin inserting holes are arranged in three lines, with the axial lead of the medium line parallel to that of the screw inserting holes and the side lines forming an angle of no less than 8 degrees and no more than 12 degrees and line forming an angle an angle of no less than 4 degrees and no more than 6 degrees with the medium. The utility model adjusts the direction of the guide pins without removing and reinserting of the guide pins and is able to fix the hard and solid screws without the arrangement of screws through the guide pins. With the arrangement of the screw inserting holes corresponding to the anatomic characteristics, the inserting of the screws is precise and reasonable. Meanwhile, due to the discerning of the guide pins under the X ray fluoroscopy, the length and position of the screws is conveniently determined and the fluoroscopy times are reduced.

Description

Many screws of neck of femur positioner

Technical field:

This utility model relates to a kind of orthopaedics medical apparatus and instruments, specifically is meant a kind of positioner that the neck of femur hold-down screw is inserted that is used for.

Background technology:

The positioner of at present clinical Hip Fracture internal fixation commonly used; be to utilize sight to insert guide pin earlier, need repeatedly X line perspective, adjust the guide pin position repeatedly; insert screw along the guide pin reaming; need during use to adjust repeatedly, it is more accurate to guarantee to put pin, but bigger to bone injury in the adjustment process; and the displacement phenomenon takes place in regular meeting during reaming; it is inaccurate to cause femoral head to be penetrated or put nail, can not insert screw through sight, very inconvenient.

The utility model content:

Technical problem to be solved in the utility model is to overcome at present existing Hip Fracture sight defective, provides a kind of the need to adjust repeatedly, directly inserts internal fixation screw from sight, damage little, the many screw positioners of the neck of femur of accurate positioning.

This utility model is to solve the problems of the technologies described above by following technical scheme.It comprises localizer and the location guide pin that handle is housed, it is characterized in that offering on the described localizer that 2-3 staggered screw is inserted the hole and 3-6 guide pin inserted the hole, its face that contacts with neck of femur is an inner concave that can fit with the neck of femur outer surface, guide pin is inserted the hole and is arranged in 3 row, its middle row guide pin inserts the hole axial line and screw is inserted the hole axis parallel, the guide pin of two skidding arrangements is inserted the hole and is become 8 °-12 ° each other, inserts the hole with centre row guide pin and becomes 4 °-6 °.

This utility model need not adopt to be pulled out the method that guide pin inserts again again and adjusts the guide pin direction, puts nail without guide pin and can use the stronger solid screw of hardness to fix.Its screw is inserted the hole and is arranged by the design of neck of femur anatomical features, makes to put the nail position accurately, rationally, and guide pin can be discerned scale under X line perspective simultaneously, and the perspective number of times is reduced in convenient length and the position of determining screw.

Description of drawings:

Fig. 1 is this utility model front view;

Fig. 2 is the A-A profile of this utility model Fig. 1;

Fig. 3 is this utility model location guide pin longitudinal sectional drawing.

Among the figure:

The 1-localizer; 2-locatees guide pin; The 3-screw is inserted the hole;

The 4-handle; The 5-guide pin is inserted the hole; The 6-neck of femur.

The specific embodiment:

As shown in Figure 1 and Figure 2, this utility model comprises localizer 1 and location guide pin 2, localizer 1 is provided with handle 4, makes things convenient for user to hold, and it is characterized in that offering on the described localizer 1 that 2-3 screw inserted hole 3 and 3-6 guide pin inserted hole 5, each screw is inserted between the hole 3 staggered, its diameter is 6.5mm with to insert the internal fixation screw major diameter of thread consistent, and each hole major axis is parallel, direction becomes 135 ° at angle with the femur longitudinal axis, establish the transverse section in 3 holes and arrange in a triangle.Each locatees guide pin, and to insert hole 5 diameters be 2.5mm, consistent with the external diameter of location guide pin 2, be arranged in 3 row respectively, its middle row guide pin inserts hole 5 axial lines and screw is inserted hole 3 axis parallels, the guide pin of two skidding arrangements is inserted hole 5 and is become 8 °-12 ° each other, inserts 5 one-tenth 4 °-6 ° of shapes with neck of femur 6 in hole with centre row guide pin and adapts.The face that this utility model localizer 1 contacts with neck of femur 6 is an inner concave that can fit with neck of femur 6 outer surfaces, becomes face to contact with neck of femur 6 outer surfaces in the time of can guaranteeing to use, and prevents to produce friction and damages when injected organism tissue.

As shown in Figure 3, this utility model location guide pin 2 is an elongated even circular metal pin, it is characterized in that external diameter is 2.5mm, and to insert hole 5 diameters consistent with guide pin, its outer cannelure that is processed with, and each cannelure is 1cm at interval.During use according to hip anatomical position placement positioning device 1, before placing the outer lateral deviation of femur upper segment, insert hole 5 through the center guide pin earlier and insert location guide pin 2, perspective is determined direction, the degree of depth, angle, improper as the position, according to perspective as a result after the error in judgement, can not pull out location guide pin 1, utilize each guide pin to insert angle hole fine setting localizer 1 position up and down, hole 5, judge correct position after, insert hole 3 to neck of femur 6 borings and insert cancellous bone screw through screw.

Claims

1, a kind of many screws of neck of femur positioner, comprise localizer (1) and location guide pin (2) that handle (4) are housed, it is characterized in that offering on the described localizer (1) that 2-3 screw inserted hole (3) and 3-6 guide pin inserted hole (5), its face that contacts with neck of femur (6) is an inner concave that can fit with neck of femur (6) outer surface.

2, many screws of neck of femur positioner according to claim 1, it is staggered to it is characterized in that screw is inserted hole (3).

3, many screws of neck of femur positioner according to claim 1, it is characterized in that guide pin insert hole (5) be arranged in 3 the row, its middle row guide pin inserts hole (5) axial line and screw is inserted hole (3) axis parallel, the guide pin of two skidding arrangements is inserted hole (5) and is become 8 °-12 ° each other, inserts hole (5) with centre row guide pin and becomes 4 °-6 °.