CN201861746U - Gas/liquid biphase intramedullary nail - Google Patents

Abstract

The utility model provides a gas/liquid biphase intramedullary nail, belongs to the technical field of medical equipment in the orthopedics department, and is used for fixing the long bone fracture. The gas/liquid biphase intramedullary nail has the technical scheme that the gas/liquid biphase intramedullary nail is a strip-shaped gas/liquid bag which is made from the high-intensity macromoleclar polymer and is wholly sealed, one end of the gas/liquid bag is connected with a connecting pipe which is filled with the gas and the liquid, the connecting pipe is provided with a valve, the lengths of the liquid bag are 50-700mm, and the diameters of the liquid bag are 5-50mm. The gas/liquid biphase intramedullary nail has the advantages that the nail is simple to operate the minimally invasive surgery; the nail can offer the axial micro inching to stimulate the healing of the fracture; and the nail is convenient to withdraw. The gas/liquid biphase intramedullary nail replaces the conventional rigid metal intramedullary nail with the flexible gas/liquid bag, thereby being a pioneering work which breaks through the normal thinking, so that the defects of the stress shielding, the multi-operation, the easy infection, the difficult withdrawing of the intramedullary nail and the like during treating the long bone fracture in the prior art are solved, a good effect which is beyond thought is obtained, and the nail is worth to widely popularize.

Description

A kind of gas, liquid two-phase intramedullary pin

Technical field

This utility model relates to the intramedullary pin that a kind of orthopaedics therapy long bone fracture uses, and belongs to the orthopedic medical device technical field.

Background technology

The human body long bone fracture is the common disease in the orthopaedic medical treatment, adopts usually in clinical treatment and inserts intramedullary pin with fracture end connection and fixing in key pulp cavity.Intramedullary pin is a kind of medical apparatus and instruments of treatment long bone of limbs fracture, but because the rigid structure of himself, insert in the process at intramedullary pin, there is extruding near the soft tissue otch and osseous tissue, cause damage to a certain degree, and the bending of main nail, fracture, situations such as screw extraction may take place because of stress concentrations.Along with the progress and the development of treatment technology, the technical staff has designed multiple improved intramedullary pin, and as interlocking intramedullary nail etc., what fracture end had been controlled in these uses that improve intramedullary pins effectively bends, turns round, cuts iso-stress, has improved the healing rate of fracture.But in clinical, find, these intramedullary pins are the firm static device, in the process of fractures, there is stress shielding, be unfavorable for union of fracture, the part needs of patients is fixedly carrying out the operation of secondary motorization after a period of time, the screw of a fixed end is unclamped, make intramedullary pin produce fine motion, to promote union of fracture.This method has increased operation number of times and infection chance, has also increased patient's misery and financial burden.After the union of fracture, most intramedullary pins need to take out, and the patient often needs to stand second operation, and local soft tissue is caused damage; After the union of fracture in the pulp cavity sclerotin intramedullary pin master that often grows into follow closely in the hole, increased intramedullary pin and taken out difficulty; In addition, the filling effect that bone tissue growth produces in the pulp cavity also can influence the taking-up of intramedullary pin.

Therefore how to design easy and simple to handle, the required axial fine motion stimulation of union of fracture can be provided, to the surrounding tissue damage little and intramedullary pin that be easy to take out be perplexing orthopaedics clinical in the difficult problem of shaft fracture technique for fixing development.

The utility model content

Technical problem to be solved in the utility model provides a kind ofly can reduce operation wound, eliminate stress and block, promote union of fracture, and simple and practical gas, liquid two-phase intramedullary pin.

The technical scheme that solves the problems of the technologies described above is:

A kind of gas, liquid two-phase intramedullary pin, it is a bar shaped gas, liquid capsule, is made by high-intensity high molecular polymer, integral sealing at one end is connected with the connection tube that charges into gas and liquid, and valve is arranged on the connection tube, the length of bar shaped gas, liquid capsule is 50-700mm, and diameter is 5-50mm; Can select suitable length according to different fracture crowds and fracture site.

Above-mentioned gas, liquid two-phase intramedullary pin, the skin of its bar shaped gas, liquid capsule are coated with the coating that does not see through the X line.

Above-mentioned gas, liquid two-phase intramedullary pin charge in the liquid of bar shaped gas, liquid capsule and are mixed with X line developing agent.

Usefulness of the present utility model is:

Use flexible gas, liquid capsule to replace traditional rigid metal intramedullary pin, volume is little in the time of in the implantable bone pulp cavity, adopts Minimally Invasive Surgery to finish, and is simple to operate; After implanting put in place fill gas body or liquid in bar shaped gas, the liquid capsule, can reach enough rigidity, play fixation; Air bag or liquid capsule can provide union of fracture required axial fine motion stimulation, stimulate union of fracture; Bar shaped gas, liquid capsule damage little and are easy to surrounding tissue and take out.

This utility model has replaced traditional rigid metal intramedullary pin with flexible gas, liquid capsule, be an invention that breaks through normal thinking, solve the stress shielding that exists in the long bone fracture treatment in the past, repeatedly performed the operation, be easy to infect, taken out various disadvantages such as intramedullary pin difficulty, obtained beyond thought good result, be worth promoting.

Description of drawings

Fig. 1 is user mode figure of the present utility model.

Labelling is as follows among the figure: bar shaped gas, liquid capsule 1, connection tube 2, long bone 3, pulp cavity 4.

The specific embodiment

Show among the figure, this utility model is a kind of bar shaped gas, liquid capsule 1 that is made into by high-intensity high molecular polymer, and its integral sealing at one end is connected with the connection tube 2 that charges into gas and liquid, on the connection tube 2 valve is arranged, can in gas, liquid capsule 1, charge into gas or liquid.

The 50-700mm of bar shaped gas, liquid capsule 1, diameter are 5-50mm.The skin of bar shaped gas, liquid capsule 1 is coated with the coating that does not see through the X line, perhaps is mixed with X line developing agent in the liquid that charges into bar shaped gas, liquid capsule 1, can carry out X line image like this and observe or take in operation, observes and adjust its position and degrees of expansion.

Using method of the present utility model:

During treatment long bone 3 shaft fractures, cut skin successively, separate subcutaneous tissue, appear opening, UNICOM's pulp cavity 4 according to conventional intramedullary pin operative approach and key points for operation; Because it need not to insert thick and stiff metal intramedullary nail, can be little otch Wicresoft finish.Afterwards, can expand marrow or not expand marrow, use round end guide pin or supporting service aisle bar shaped gas of the present utility model, liquid capsule 1 are inserted pulp cavity 4, charge into gases at high pressure or liquid, gas, liquid capsule 1 be expanded become straight, be close to pulp cavity 4 inwalls, play the effect of fixing fracture.

After the union of fracture, emit gases at high pressure or liquid, tractive can take out.

Claims (2)

1. a gas, liquid two-phase intramedullary pin, it is characterized in that: it is a bar shaped gas, liquid capsule (1), make by high-intensity high molecular polymer, integral sealing, at one end be connected with the connection tube (2) that charges into gas and liquid, connection tube has valve on (2), and the length of bar shaped gas, liquid capsule [1] is 50-700mm, and diameter is 5-50mm.

2. gas according to claim 1, liquid two-phase intramedullary pin is characterized in that: the skin of its bar shaped gas, liquid capsule (1) is coated with the coating that does not see through the X line.

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