CN2712293Y - Self-locking intramedullary nail with rotary arm - Google Patents

Abstract

The utility model relates to a self-locking intramedullary nail with a rotary arm that can be widely used for treating fracture of femur, tibia and humeral backbones and has various forms and species. The self-locking intramedullary nail with the rotary arm is composed of a main nail, a long column self-locking nail, a self-locking nail, a self-locking screw and an end plug. The main nail is circular and tubular, the pipe wall of the tail part and the pipe wall of the tip part are provided with longitudinal slot holes, the pipe wall of the tail part is provided with external threads, and the body part is bent or is not bent. The long column self-locking nail is a solid bar, the upper part of the long column self-locking nail is provided with screw threads, and a rotary arm is clamped on the lower end of the long column self-locking nail. The long column self-locking nail is inserted, installed and fixed oppositely in the tip part cavity of the main nail body, and the rotary arm thereof can be folded and unfolded. The self-locking nail can be inserted into the tail part cavity of the main nail, the rotary arm can be folded and unfolded by the slot holes of the pipe wall of the main nail, the self-locking screw can be rotated into the tail end of the main nail, and the tip end of the main nail is closed by the end plug.

Description

Turning arm self-locking intramedullary pin

Technical field this utility model relates to medical apparatus and instruments, and particularly a kind of intramedullary pin device that is used for the treatment of long tubular bone fracture is referred to as " turning arm self-locking intramedullary pin ".

Background technology is in the long tubular bone fracture treatment in orthopaedic medical treatment field, be rotation, cripetura, the one-tenth angle prevent fracture site and separate displacement, Chinese patent 00222007.5 disclose a kind of by a main nail, one from lock, one to multiple piece of self-locking nail and one piece of combination self-locking intramedullary pin that Self-locking screw is formed.Many pieces of tip self-locking nails of this combination self-locking intramedullary pin all must insert from main nail tail end successively, pass the master and follow closely full section central cavity, arrive after the master follows closely the tip its rectangle turning arm is opened to external rotation through tube wall vertical shape groove mouth.In order to make self-locking nail can pass the full section of main nail cavity smoothly, its main nail can not have bending and should have bigger inner chamber footpath, and simultaneously, the insertion of tip self-locking nail is operated also relative complexity with taking out, so make it how can only be applicable to the human femur under loading treatment of fractures, the scope of application is affected.

The summary of the invention the purpose of this utility model is improved combination self-locking intramedullary pin, insert and install so that provide a kind of tip self-locking nail to finish, further simplify operation technique and can be widely used in the turning arm self-locking intramedullary pin that femur, tibia, humerus bone are analysed treatment.

The turning arm self-locking intramedullary pin of this utility model design is made up of a main nail, long column self-locking pinning, two to three pieces of self-locking pinnings, one piece of Self-locking screw and end plug.Main nail is the pipe column, is divided into tail, body, sharp three parts, and tail, tip are short and straight, and tube wall has a plurality of stringer notches, and afterbody caudal part 10mm tube wall has external screw thread, and body is longer, has or do not have flexibility; Long column self-locking pinning is a long filled circles column metallic rod, and external screw thread or female thread chamber are arranged at its top, and the lower end has notch, clamping is single or a pair of rectangle turning arm, and connects and composes with the strand pin; Self-locking screw is one piece of screw rod that is complementary with main nail tail end screw thread inner chamber; End plug is the conical metal derby of the one piece of main nail of sealing tail end.Described long column self-locking pinning can caudad insert fully, be installed in the central cavity of main nail body, tip by main nail tip; and long column self-locking pinning can be at the upper and lower slip certain distance of intracavity, its rectangle turning arm is drawn in or opens in main nail tip tube chamber and tube wall notch.Described self-locking pinning can freely insert and take out in main nail afterbody central cavity, and its rectangle turning arm can open to external rotation through tube wall vertical shape groove mouth.

This utility model is compared with combination self-locking intramedullary pin, insertion, installation and relative fixed are in main nail body, tip because long column self-locking pinning in tip has driven in the wrong direction, discarded many pieces of tip self-locking nails and, further simplified operation technique, increased operation safety from the structure of lock; Because main nail body allows certain radian and crooked the existence, can produce the turning arm self-locking intramedullary pin of various ways kind, can be used for the treatment of the shaft fracture at each position such as femur, tibia, humerus, obviously increase the scope of application, intramedullary pin insert and dial-out becomes more easy.

Providing accompanying drawing below the description of drawings further specifies in conjunction with the embodiments

Fig. 1 is a turning arm self-locking intramedullary pin front section view

Fig. 2 is the long column self-locking pinning cutaway view in the turning arm self-locking intramedullary pin

Self-locking screw 1 self-locking pinning 2 main nail 3 long column self-locking pinnings 4 main nail tip tube wall vertical shape groove mouths 5

Rectangle turning arm 6 end plugs 7 of long column self-locking pinning

This utility model is formed each part and all used medical stainless steel or titanium alloy material to make, its performance characteristics: long column self-locking pinning 4 is installed on earlier in main nail 3 bodies, the tip cavity, and it is most advanced and sophisticated and fixing again end plug 7 to be inserted main nail.When long column self-locking pinning 4 upwards slided in the central cavity of main nail 3, its rectangle turning arm 6 was upwards driven and is drawn in fully in main nail cavity and tube wall notch, keeps the smooth smooth of main nail outer surface; When long column self-locking pinning 4 in the central cavity of main nail 3 during to lower slider, its rectangle turning arm 6 is pushed downwards and moves, and under the answering back to of end plug, its turning arm 6 is opened to external rotation.The pushing of the Self-locking screw 1 in screwing in main nail 3 tail ends and the end plug 7 that is fixed in main nail 3 tips down, the rectangle turning arm that is positioned at the long column self-locking pinning 4 of main nail 3 central cavity and inserts the self-locking pinning 2 of main nail 3 afterbody cavitys can both be followed closely 3 corresponding tube wall vertical shape groove mouths through the master and open to external rotation.

The operation indication of specific embodiment turning arm self-locking intramedullary pin: be used for various types of fracture of femur, tibia, humerus backbone 3/4ths, pathologisch Bruch, nonunion, the bone malformation healing, bone prolongs.

Turning arm self-locking intramedullary pin operation technique main points: anesthesia back patient lies on the back or lies on one's side on operation table, little otch open reduction or tv x-ray machine perspective be the closed reduction fracture down, little otch appears or the guide pin that drives in the wrong direction is determined into the nail point, through going into the boring of nail point, expand or do not expand medullary cavity, draw mobile long column self-locking pinning 4 that its rectangle turning arm 6 is drawn in fully in main nail 3 tip cavitys at main nail 3 intracavity on threaded rod, keeping under the smooth slick prerequisite of main nail outer surface, insert the main nail 3 of suitable external diameter and length fully, in main nail 3 afterbody central cavity, insert self-locking pinning 2, and rotate self-locking nail and make its turning arm embed main nail pod mouth, at last Self-locking screw 1 is firmly screwed in fully main nail tail end female thread chamber and promptly finish internal fixation operation with self-locking property.

Claims (3)

1, a kind of turning arm self-locking intramedullary pin, it is characterized in that it is made up of a main nail, a long column self-locking pinning, two to three pieces of self-locking pinnings, one piece of Self-locking screw and one piece of end plug, have the various ways kind, the master follows closely into the pipe column, is divided into tail, body, sharp three parts, tail, tip are short and straight, have a plurality of stringer notches on the tube wall, on the main nail afterbody caudal part 10mm tube wall external screw thread is arranged, can be connected with installing apparatus, body is longer, has or do not have angle of bend; Long column self-locking pinning has the filled circles column metallic rod in external screw thread or female thread chamber, its lower end that poor mouthful of single or a pair of rectangle turning arm of clamping arranged by a top, and with the connection of strand pin and constitute; Self-locking screw is one can screw in main nail tail end female thread chamber, rise promote, the long column self-locking nail in the fixing main nail central cavity and the screw rod of self-locking pinning; End plug is followed closely the tip and is stopped a coniform metal derby of long column self-locking nail slippage for sealing is main.

2, turning arm self-locking intramedullary pin according to claim 1, it is characterized in that described long column self-locking pinning is caudad to insert fully, install from main nail tip, and relative fixed is in main nail body, tip central cavity, long column self-locking pinning can be at the upper and lower slip certain distance of intracavity, its rectangle turning arm is corresponding with its upper and lower slip to be drawn in and is opened, and can guarantee to lead after drawing in fully to follow closely the smooth smooth of outer surface.

3, turning arm self-locking intramedullary pin according to claim 1 is characterized in that the total length that main nail intracavity is formed each part equals main length of following closely.