CN2699845Y

CN2699845Y - Memory alloy vertebrae strutting device

Info

Publication number: CN2699845Y
Application number: CN 200420007603
Authority: CN
Inventors: 沈建雄; 张智海
Original assignee: Individual
Current assignee: Individual
Priority date: 2004-03-24
Filing date: 2004-03-24
Publication date: 2005-05-18
Anticipated expiration: 2014-03-24

Abstract

The utility model discloses two memory alloy vertebrae strutting devices used for treating vertebral compression fractures. The memory alloy vertebrae strutting device is made of nitinol memory alloy plate and in double-leaf S shape, and the shape can be varied according to the variation of the temperature. The strutting device is also provided with a sleeve tube and a central rotary core rod which are matched with each other. The sleeve tube is made of stainless steel, and the front end of the sleeve tube is provided with a slot. The central rotary core rod is made of stainless steel bars, and the front end of the central rotary core rod is cut with a groove. The coaxial rotation of the sleeve tube and the central rotary core rod can crimp and relax the strutting device. The strutting device is applied in hard tissue such as a vertebral body to provide push off force, which can not only push off the pressed vertebral body with a certain height but also create partially enlarged space in the vertebral body. The memory alloy vertebrae strutting device is convenient for injecting viscous bone cement with low-voltage and reduces complication.

Description

Memorial alloy vertebral body dilator

Technical field

This utility model relates to a kind of minimally invasive medical apparatus for the treatment of the spinal vertebral compression fracture, relates in particular to the memorial alloy vertebral body dilator of using when treatment osteoporotic vertebral compression fracture.

Background technology

Along with Chinese old people is more and more, sufferers of osteoporosis face is also more and more, and especially when compression fracture of vertabral body took place, treatment means lacked, and common vertebroplasty apparatus can't improve the vertebral body shape and recover the normal physiological bending of spinal column, poor effect.Memorial alloy is applied to a lot of fields of medical treatment, even the design of spring shape is also arranged, but is mainly used in the blood vessel, in the soft pipelines such as urethra, trachea, is not applied in the sclerous tissues such as vertebral body so that bigger strength and shaping feature to be provided.

The utility model content

For overcoming the above-mentioned defective of prior art, the purpose of this utility model provides a kind ofly can carry out shaping to vertebral body when the osteoporotic vertebral compression fracture, and can reduce the memorial alloy vertebral body dilator of the complication that kyphosis brings.

For achieving the above object, this utility model provides a kind of memorial alloy vertebral body dilator, is used for the treatment of compression fracture of vertabral body, and this dilator is made by Ultimum Ti sheet material, is bilobate serpentine shape, with variation of temperature change of shape takes place.

The Ultimum Ti sheet material that described dilator is thick by 0.25mm or 0.3mm, 12mm is wide, 30mm is long is made.

Described dilator also is provided with supporting sleeve pipe and center rotation plug; Described sleeve pipe is made by medical stainless steel, and front end has groove; Described center rotation plug is made by the medical stainless steel bar, and front cutting has fluting; Sleeve pipe curls, loosens dilator with the center coaxial energy of rotation of rotation plug.

Memorial alloy vertebral body dilator of the present utility model is processed by the Ultimum Ti plate, be bilobate serpentine reed, can be applied in the sclerous tissueses such as vertebral body, dilator varies with temperature and change of shape takes place, the power of strutting is provided, the vertebral body of compression not only can be strutted certain altitude, can also in vertebral body, create the space that part enlarges, be convenient to reduce complication in low pressure, heavy-gravity bone cement is injected into.

Description of drawings

Figure 1A is the axonometric chart of memorial alloy vertebral body dilator of the present utility model;

Figure 1B is the front view of Fig. 1;

Fig. 1 C is the vertical view of Fig. 1;

Fig. 2 A is a telescopic axonometric chart of the present utility model;

Fig. 2 B is the front view of Fig. 2 A;

Fig. 2 C is a K portion enlarged diagram among Fig. 2 B;

Fig. 3 A is the axonometric chart of plug of the present utility model;

Fig. 3 B is the front view of Fig. 3 A;

Fig. 3 C is a P portion enlarged diagram among Fig. 3 B.

The specific embodiment

Shown in Figure 1A-Fig. 1 C, memorial alloy vertebral body dilator 1 of the present utility model is designed to the engineering spring-like, is bilobate serpentine shape, and Ultimum Ti panel material thick by 0.25mm or 0.3mm, that 12mm is wide, 30mm is long processes.This dilator 1 also needs supporting assistive device in use, that is: the rotation of the center shown in the sleeve pipe 2 shown in Fig. 2 A-Fig. 2 C and Fig. 3 A-Fig. 3 C plug 3.

Shown in Fig. 2 A-Fig. 2 C, sleeve pipe 2 is made by medical stainless steel, and its external diameter is 5.5mm, and internal diameter is 5mm, and total length is 140mm; Sleeve pipe 2 front ends have groove 20, and the length of this groove 20 is 15mm, and width is 0.75mm, are convenient to dilator 1 and come in and go out.

Shown in Fig. 3 A-Fig. 3 C, rotation plug 3 in center is that the medical stainless steel bar of 2.5mm is made by diameter, and total length is 144mm; Its front cutting has fluting 30, this slot 30 long 15mm, wide 0.25mm.

Sleeve pipe 2 and center rotation plug 3 is equipped with the T-handle (not shown), because sleeve pipe 2 front ends have groove 20, so when coaxial revoling tube 2 and center rotate plug 3, can curl or loosen dilator 1.When coaxial revoling tube 2 and center rotate plug 3 in mixture of ice and water, can drive dilator 1 curls into sleeve pipe, dilator 1 can be placed in patient's the vertebral body by pedicle of vertebral arch, coaxial again revoling tube 2 and center rotation plug 3, can loosen dilator 1, again to dilator 1 perfusion 40 degree warm water, dilator 1 can expand automatically, the power of strutting is provided, the vertebral body of patient's compression is strutted certain altitude, can also in vertebral body, create the space that part enlarges, be convenient in low pressure, heavy-gravity bone cement is injected into.

Claims

1, a kind of memorial alloy vertebral body dilator is used for the treatment of compression fracture of vertabral body, it is characterized in that, this dilator (1) is made by Ultimum Ti sheet material, is bilobate serpentine shape.

2, memorial alloy vertebral body dilator according to claim 1 is characterized in that, the Ultimum Ti sheet material that described dilator (1) is thick by 0.25mm or 0.3mm, 12mm is wide, 30mm is long is made.

3, memorial alloy vertebral body dilator according to claim 1 is characterized in that, described dilator (1) also is provided with supporting sleeve pipe (2) and center rotation plug (3);

Described sleeve pipe (2) is made by medical stainless steel, and front end has groove (20); Described center rotation plug (3) is made by the medical stainless steel bar, and front cutting has fluting (30); Sleeve pipe curls, loosens dilator (1) with the center coaxial energy of rotation of rotation plug.