CN2892011Y

CN2892011Y - Artificial nucleus pulposus pseudobody through skin puncture planting in intervertbral disk

Info

Publication number: CN2892011Y
Application number: CNU200620020591XU
Authority: CN
Inventors: 孙柏田; 林均利
Original assignee: Individual
Current assignee: Individual
Priority date: 2006-04-13
Filing date: 2006-04-13
Publication date: 2007-04-25
Anticipated expiration: 2016-04-13

Abstract

The utility model discloses a kind of artificial marrow nucleus body planted in the intervertebral disc after the percutaneous puncture, including an artificial marrow nucleus and a test module. The artificial marrow nucleus is a strip-shaped object composed of the outer and inner jackets of the ultrahigh molecular polyethylene, a net-shaped frame of titanium alloy, and the marrow nucleus of semi-liquid hydrogel; the net-shaped frame of titanium alloy (2) is arranged between the outer jacket (1) and the inner jacket (3) of the ultrahigh molecular polyethylene; the marrow nucleus of semi-liquid hydrogel (4) is arranged in the inner jacket of the ultrahigh molecular polyethylene; the test module and the marrow nucleus are of the same shape with the calibration on one end. The utility model is planted into the intervertebral disc through the work channel built in the elimination process of the marrow nucleus by the percutaneous puncture, and the device can be used to effectively restore the normal biomechanical function of the intervertebral disc. When used, the utility model is pulled to be open and planted through the work channel; the operation is simple with little surgical trauma; the implantation of the utility model will not influence the structural integrity of the intervertebral disc; the stability is good; and the restoration can effectively ensures the normal biomechanical function of the intervertebral disc.

Description

A kind of percutaneous puncture is implanted the artificial nucleus prosthese of intervertebral disc

One, technical field

The utility model relates to the artificial nucleus prosthese, specifically is that a kind of percutaneous puncture is implanted the artificial nucleus prosthese that is used to have efficient recovery normal disc biomechanics function in the intervertebral disc.

Two, background technology

Intervertebral disc is the vesselless tissue of human body maximum, is the high special structure that is made of multiple connective tissue, comprises vertebral pulp, fibrous ring and cartilage endplate, the physiological function that these structurally ordered rational arrangements are brought into normal play intervertebral disc.Because extraneous factor is or/and increase the age institute aging intervertebral disc generation degenerative change that makes extremely, its clinical manifestation is a waist, the pain that has a pain in the leg, intervertebral disc afunction in the time of seriously.At present, traditional therapy to the intervertebral disc degeneration illness is intervertebral disc marrow nuclear excising art or spinal fusion, the former needs the surgical removal vertebral pulp, the excision of functional nucleus pulposus will inevitably cause intervertebral height to reduce, very easily cause the forfeiture of the original biomechanical property of intervertebral disc, potential the risk that causes intervertebral disc further to degenerate; The latter is because the skeletonization between soleplate has been brought out in the fusion of vertebral body, although can the stable disease zone, but reduced the range of movement of spinal column, because the compensation of spinal column can cause the generation of neighbouring section regression, and because of itself being a kind of height aggressive art formula, operation wound is bigger, though therefore above-mentioned two kinds of methods can be removed patient's pain to a certain extent, all exists such or such complication.Reaching in the time in 75 years, many surgeon and engineers and technicians attempt design, development artificial intervertebral disk, to keep the mobility of pathological interspinal dish sections, prevent other sections intervertebral disc degeneration.Chapter 13 the 3rd joint by in golden the earth, Qu Dongbin, Charles D.Ray chief editor " vertebral column intervertebral joint urethroptasty " according to the printing and publishing in June, 2004 of scientific and technical literature publishing house is put down in writing, nearly 100 kinds of artificial intervertebral disks patent, but only a few is by platform load test, cadaver sample or animal Implantation Test, and the product that is dropped into clinical trial is very few.The 4th joint of this book provides a kind of lumbar intervertebral disc artificial nucleus prosthese, it is by the half mobile hydrogel nucleus of high-molecular polythene overcoat and Qi Nei (poly-third ethylene nitrile-polyacrylamide copolymer), its profile is two kinds in wedge shape and a rectangle, by Charles doctor D.Ray is invented, also be at present unique clinical artificial nucleus prosthese that is applied to.Moisture that can the weight 80% of absorption own after the complete expansion of this intervertebral disc artificial nucleus, and its volume can change with load, during use with special-purpose fibrous ring expander, vertebral plate dilator, prosthese examination film, implant guide, to hold apparatuses such as prosthese pincers, round end propeller, elbow localizer supporting.The extensive use in Europe of above-mentioned lumbar intervertebral disc artificial nucleus prosthese, the existing 3000 many cases patients in the whole world have accepted this prosthese implant surgery.The follow-up investigation of postoperative finds that its clinical effectiveness does not make us very satisfied yet, and the problem of existence is the prostheses migration of implanting; In addition, when implanting this lumbar intervertebral disc artificial nucleus prosthese, its art formula and conventional way of escape vertebral lamina fenestration, resection of nucleus pulposus are identical, and the row laminectomy is removed osseous tissue and reached the wide service aisle of 12mm at least and could insert operating apparatus, so wound is big.

Three, summary of the invention

The purpose of this utility model provides the artificial nucleus prosthese that a kind of percutaneous puncture is implanted intervertebral disc, when this prosthese is implanted, does not need surgical operation, and it is good to implant rear stability, recovers the back and guarantees normal disc biomechanics function.

The purpose of this utility model is achieved by following technical proposals: this percutaneous puncture intervertebral disc artificial nucleus prosthese comprises nucleus prosthesis and die trial; Nucleus prosthesis is the bar that is made of overcoat, netted tweezer titanium alloy support, half mobile hydrogel nucleus in the ultra high molecular polyethylene, netted tweezer titanium alloy props up and is placed between ultra high molecular polyethylene overcoat and the interior cover, in half mobile hydrogel nucleus places and overlaps in the ultra high molecular polyethylene; Die trial is identical with the shape of nucleus prosthesis, and an end has scale.

Described nucleus prosthesis width is 2-6mm, and thickness is 5-9mm.

Described die trial width is 2-6mm, and thickness is 5-9mm.

The naturalness of described nucleus prosthesis or die trial is spiral.

Described nucleus prosthesis is the overall dimensions of bank position, and vertically diameter is 10-20mm, and trans D is 23-30mm.

The good effect that the utlity model has: use this utility model not need surgical operation, the service aisle of setting up when utilizing percutaneous puncture to extract vertebral pulp draws back this utility model, implants by service aisle, and simple to operate, wound is little; It is complete not influence intervertebral disc structure after the implantation, and good stability can effectively guarantee the biomechanics function of normal disc after the recovery.

Four, description of drawings

Fig. 1 is a deployed condition structural representation of the present utility model;

Fig. 2 is the cross-sectional configuration sketch map of Fig. 1;

Fig. 3 is the structural representation that this utility model is naturalness;

Fig. 4 is the structural representation of die trial in this utility model.

Among the figure: cover 4 vertebral pulps in 1 overcoat, 2 supports 3

Five, the specific embodiment

The utility model is described in further detail below in conjunction with the specific embodiment:

Fig. 1 is in conjunction with structure shown in Figure 2, and the artificial nucleus prosthese that this percutaneous puncture is implanted intervertebral disc comprises nucleus prosthesis and die trial; The bar that nucleus prosthesis is made of overcoat, netted tweezer titanium alloy support, half mobile hydrogel nucleus in the ultra high molecular polyethylene, netted tweezer titanium alloy support 2 places between ultra high molecular polyethylene overcoat 1 and the interior cover 3, and half mobile hydrogel nucleus 4 places in the ultra high molecular polyethylene overlaps in 3.The width of nucleus prosthesis is 2-6mm, and thickness is 5-9mm.Die trial is identical with the structure of nucleus prosthesis, and an end has scale, and the structure of die trial is consulted Fig. 4, and the width of die trial is 2-6mm, and thickness is 5-9mm.

Its product of this utility model is divided into different size by the human intervertebral disc size, nucleus prosthesis in the product is because of there being netted tweezer titanium alloy support between interior overcoat, limited by netted tweezer titanium alloy support, the naturalness of product is spiraled together, consult Fig. 3, nucleus prosthesis is the overall dimensions of bank position, and vertically diameter (being meant anteroposterior diameter when corresponding to human body) is 10-20mm, trans D (being meant transverse diameter when corresponding to human body) is 23-30mm, to adapt to the demand of different ethnic groups.Overcoat 2 and interior cover 3 in this utility model are ultra high molecular polyethylene, specifically be that a kind of molecular weight is the high density polyethylene (HDPE) more than 1,000,000, its material of network is identical with medical tube chamber tweezer titanium alloy support, and half mobile hydrogel nucleus is the poly-third ethylene nitrile, one polyacrylamide copolymer.Used material is used in medical field, and through clinical proof its to human body nonhazardous effect, be service life 50 years.During use, extract vertebral pulp through percutaneous puncture intervertebral disc Minimally Invasive Surgery earlier, the service aisle of setting up when utilizing Minimally Invasive Surgery to extract vertebral pulp does not have a graduated end with die trial and implants intervertebral disc.When die trial is full of intercalated disc,, calculate and determine to answer specification, the size of implantable artificial nucleus prosthesis according to the scale that remains in the die trial of working column outer end.Working size according to the intervertebral disc of being measured by die trial in the art draws back corresponding specification size artificial nucleus prosthese, implants from service aisle.Artificial nucleus prosthese after the implantation is spiral and is full of intercalated disc and good stability in intercalated disc, can not take place to be shifted and to come off.

Claims

1, a kind of percutaneous puncture is implanted the artificial nucleus prosthese of intervertebral disc, and it is characterized in that: this percutaneous puncture intervertebral disc artificial nucleus prosthese comprises nucleus prosthesis and die trial; The bar that nucleus prosthesis is made of overcoat, netted tweezer titanium alloy support, half mobile hydrogel nucleus in the ultra high molecular polyethylene; Netted tweezer titanium alloy support (2) places between ultra high molecular polyethylene overcoat (1) and the interior cover (3), in half mobile hydrogel nucleus (4) places and overlaps in the ultra high molecular polyethylene; Die trial is identical with the shape of nucleus prosthesis, and an end has scale.

2, percutaneous puncture according to claim 1 is implanted the artificial nucleus prosthese of intervertebral disc, and it is characterized in that: the width of described nucleus prosthesis is 2-6mm, and thickness is 5-9mm.

3, percutaneous puncture according to claim 1 is implanted the artificial nucleus prosthese of intervertebral disc, and it is characterized in that: the width of described die trial is 2-6mm, and thickness is 5-9mm.

4, percutaneous puncture according to claim 1 and 2 is implanted the artificial nucleus prosthese of intervertebral disc, and it is characterized in that: the overall dimensions that described nucleus prosthesis is bank position is that vertical diameter is 10-20mm, and trans D is 23-30mm.