CN209285594U - A kind of eccentric expanded casing - Google Patents

Abstract

The utility model discloses a kind of eccentric expanded casings, including working tube, Stent assembly and guide pin, working tube is equipped with receiving portion, it is characterized by: Stent assembly includes several expansion pipes, the fluting that each expansion pipe is equipped with cavity and is connected to cavity, cavity is located at the side of expansion pipe and is connected to by fluting with outside, the size of several expansion pipes is sequentially reduced in order to which several expansions pipe is mutually arranged, Stent assembly is contained in the receiving portion of working tube, guide pin is contained in inner most expansion pipe and contacts with working tube, by above-mentioned design, form eccentric structure, the size of expanded casing is set to become smaller, integral diameter reduces, narrow Kambin triangle can be protruded into, expansion retracts root canal soft tissue and nerve root to appear annulus fibrosus disci intervertebralis, not injuring nerve root, medical staff being capable of visual operation.

Description

A kind of eccentric expanded casing

Technical field

The utility model relates to medical instruments, more particularly, to a kind of eccentric expanded casing.

Background technique

With Kambin triangle (upper limb and dura mater after lumbar vertebrae " triangle of safety workspace ", i.e. exiting nerve root, the next centrum Region between capsule lateral border) proposition, intervertebral disc mirror technology development, there is scholar to carry out under oblique lateral approach intervertebral disc mirror Through Kambin triangle waist interbody fusion.

However the sleeve of intervertebral disc mirror expansion at present is in concentric garden cylindricality, through narrow Kambin triangle expansion easy damaged nerve Root, therefore biggish expansion sleeve and working tube only preferably reach between adjacent two transverse process or later, cannot expand and retract soft group of root canal It knits and nerve root is still blind view operation, nerve root damage to appear annulus fibrosus disci intervertebralis, when handling interverbebral disc and intervertebral fusion under mirror Cold danger is high.

Utility model content

For overcome the deficiencies in the prior art, the purpose of this utility model is to provide one kind can expand retract root canal it is soft Tissue and nerve root are to appear the eccentric expanded casing of annulus fibrosus disci intervertebralis.

The purpose of this utility model is implemented with the following technical solutions:

A kind of eccentric expanded casing, including working tube, Stent assembly and guide pin, the working tube are equipped with receiving portion, It is characterized by: the Stent assembly includes several expansion pipes, each expansion pipe is equipped with cavity and is connected to the cavity Fluting, the cavity is located at the side of the expansion pipe and is connected to by the fluting with external, several pipes of expanding Size is sequentially reduced in order to which several expansion pipes are mutually arranged, and the Stent assembly is contained in the receiving of the working tube Portion, the guide pin are contained in the inner most expansion pipe and contact with the working tube.

Further, each expansion tube end is equipped with inclined-plane.

Further, the inclined-plane is in falcate.

Further, the intersection of the cavity and the inclined-plane is in U-shape.

Further, the guide pin includes needle point and ontology, and the needle point is located at the end of the ontology, and the needle point is Inclined surface.

Further, the needle point and described body by integral forming.

Further, the working tube includes main body, and the receiving portion is set to the main body, and the body end is set There are bevel edge and arc-shaped side, the end profile of the main body is collectively formed in the bevel edge and the arc-shaped side.

Further, the working tube further includes grip part, and the main body is fixed in the grip part.

Further, the grip part and the main body are integrally formed.

Compared with prior art, the Stent assembly of the eccentric expanded casing of the utility model includes several expansion pipes, each expansion The fluting that pipe is equipped with cavity and is connected to cavity, cavity are located at the side of expansion pipe and are connected to by fluting with outside, Ruo Gankuo The size for opening pipe is sequentially reduced in order to which several expansions pipe is mutually arranged, and Stent assembly is contained in the receiving portion of working tube, leads Needle is contained in inner most expansion pipe and contacts with working tube, by above-mentioned design, forms eccentric structure, makes expanded casing Size become smaller, integral diameter reduces, and can protrude into narrow Kambin triangle, and expansion retracts root canal soft tissue and nerve root with aobvious Reveal annulus fibrosus disci intervertebralis, injuring nerve root, medical staff being capable of visual operations.Eccentric expanded cannula structure is simple, operation side Just；It can be used cooperatively with existing intervertebral disc mirror expanded casing and service aisle；Suitable for minimally invasive through Kambin triangle waist intervertebral fusion Operation.

Detailed description of the invention

Fig. 1 is an assembling figure of the eccentric expanded casing of the utility model；

Fig. 2 is an exploded view of the eccentric expanded casing of Fig. 1；

Fig. 3 is the exploded view of a Stent assembly of the eccentric expanded casing of Fig. 1；

Fig. 4 is another exploded view of the Stent assembly of Fig. 3.

In figure: 100, eccentric expanded casing；10, working tube；11, main body；110, receiving portion；111, bevel edge；112, arc Shape side；12, grip part；20, Stent assembly；22, expansion pipe；220, it slots；221, cavity；222, inclined-plane；30, guide pin；31, needle Point.

Specific embodiment

The following will be combined with the drawings in the embodiments of the present invention, carries out the technical scheme in the embodiment of the utility model Clearly and completely describe, it is clear that the described embodiments are only a part of the embodiments of the utility model, rather than whole Embodiment.Based on the embodiments of the present invention, those of ordinary skill in the art are without making creative work Every other embodiment obtained, fall within the protection scope of the utility model.

It should be noted that it can be directly on another component when component is referred to as " being fixed on " another component Or there may also be components placed in the middle.When a component is considered as " connection " another component, it, which can be, is directly connected to To another component or it may be simultaneously present component placed in the middle.When a component is considered as " being set to " another component, it It can be and be set up directly on another component or may be simultaneously present component placed in the middle.Term as used herein is " vertical ", " horizontal ", "left", "right" and similar statement for illustrative purposes only.

Unless otherwise defined, all technical and scientific terms used herein are led with the technology for belonging to the utility model The normally understood meaning of the technical staff in domain is identical.Terminology used in the description of the utility model herein only be The purpose of description specific embodiment, it is not intended that in limitation the utility model.Term " and or " used herein includes Any and all combinations of one or more related listed items.

It is referring to FIG. 1 to FIG. 4, a kind of eccentric expanded casing 100 of the utility model, eccentric expanded casing 100 includes work Make conduit 10, Stent assembly 20, guide pin 30.

Working tube 10 includes main body 11 and grip part 12.Main body 11 is fixed in grip part 12.In one embodiment, it holds Portion 12 and main body 11 are integrally formed.Main body 11 is cylinder.Main body 11 is equipped with receiving portion 110.Entire main body is run through in receiving portion 110 11.Main body 11 is equipped with bevel edge 111 and arc-shaped side 112 far from one end of grip part 12.Bevel edge 111 and arc-shaped side 112 are collectively formed The end profile of main body 11.

Stent assembly 20 includes several expansion pipes 22.Each expansion pipe 22 is equipped with cavity 221 and opens with what cavity 221 was connected to Slot 220.Cavity 221 is located at the side of expansion pipe 22 and is connected to by fluting 220 with outside.The size of several expansion pipes 22 is successively Reduce in order to which several expansion pipes 22 are mutually arranged.Each expansion pipe 22 is cylindrical.Each 22 end of expansion pipe is equipped with inclined-plane 222.Inclined-plane 222 is in falcate.Cavity 221 and the intersection on inclined-plane 222 are in U-shape.

Guide pin 30 includes needle point 31 and ontology, and needle point 31 is located at the end of ontology, and needle point 31 is inclined surface.Needle point 31 and sheet Body by integral forming.Ontology is cylindrical.

When assembling eccentric expanded casing 100, Stent assembly 20 is contained in the receiving portion 110 of working tube 10, and guide pin 30 is received It is dissolved in the cavity 221 of expansion pipe 22, since cavity 221 is located at the side of expansion pipe 22, eccentric expanded casing 100 is in bias Structure.

The component of eccentric expanded casing 100 is all made of medical 316 stainless steel with certain elasticity and hardness and is integrally formed, It is process using molding, and the round and smooth processing of overlap is done to the components after processing.

When using eccentric expanded casing 100, lower telltale mark operation intervertenral space skin projected position is had an X-rayed, along projection line spine Prominent side opens 8-10cm and makees 1.8cm long longitudinal incision, cuts skin deep fascia layer, by guide pin 30 forward in skew back wear, with needle point 31 by Transverse process upper limb is interior forward to visit touching processus articular superior shoulder, through wearing in front of processus articular superior shoulder to interverbebral disc.The perspective monitoring of positive side position: when When reverse S-line of Golden needle point 31 is located at part outside processus articular superior shoulder, side position image position is in processus articular superior shoulder leading edge；It is fine when touching interverbebral disc Flexible sense when ring is tieed up, 31, reverse S-line of Golden needle point are no more than upper and lower pedicle of vertebral arch inner edge line, and side position image position reaches bottom in needle point 31 Upper limb after vertebra, 31 inclined surface of needle point is towards upper vertebra；When reverse S-line of Golden needle point 31 reaches part in intervertenral space, side position is as also reaching intervertenral space Middle part.Stent assembly 20 is expanded step by step, and tip ramp 222 is towards upper vertebra, after tip reaches annulus fibrosus disci intervertebralis or the next vertebra Upper limb.Finally by working tube 10 along Stent assembly 20 (inclined surface towards upper vertebra) insertion, and rotates and make working tube 10 bevel edges 111 realize tiltedly outside towards canalis spinalis to retract root canal soft tissue, appear annulus fibrosus disci intervertebralis, protection trip nerve root Look at waist interbody fusion under approach mirror straight.

By above-mentioned design, eccentric structure is formed, the size of expanded casing is made to become smaller, integral diameter reduces, and can protrude into narrow Small Kambin triangle, expansion retract root canal soft tissue and nerve root to appear annulus fibrosus disci intervertebralis, not injuring nerve root, medical care Personnel being capable of visual operation.And eccentric expanded casing 100 designs advantages of simple, and operation is minimally invasive and safe, meets lumbar vertebrae root canal Anatomical features, suitable for appearing under the oblique lateral approach intervertebral disc mirror of waist through Kambin triangle waist interbody fusion is minimally invasive.

It will be apparent to those skilled in the art that can make various other according to the above description of the technical scheme and ideas Corresponding change and deformation, and all these changes and deformation all should belong to the protection of the utility model claims Within the scope of.

Claims (9)

1. a kind of eccentric expanded casing, including working tube, Stent assembly and guide pin, the working tube is equipped with receiving portion, Be characterized in that: the Stent assembly includes several expansions pipe, and each expansion pipe is equipped with cavity and is connected to the cavity Fluting, the cavity are located at the side of the expansion pipe and are connected to by the fluting with outside, the ruler of several expansion pipes Very little to be sequentially reduced in order to which several expansion pipes are mutually arranged, the Stent assembly is contained in the receiving of the working tube Portion, the guide pin are contained in the inner most expansion pipe and contact with the working tube.

2. eccentric expanded casing according to claim 1, it is characterised in that: each expansion tube end is equipped with inclined-plane.

3. eccentric expanded casing according to claim 2, it is characterised in that: the inclined-plane is in falcate.

4. eccentric expanded casing according to claim 3, it is characterised in that: the intersection on the cavity and the inclined-plane is in U Shape.

5. eccentric expanded casing according to claim 1, it is characterised in that: the guide pin includes needle point and ontology, described Needle point is located at the end of the ontology, and the needle point is inclined surface.

6. eccentric expanded casing according to claim 5, it is characterised in that: the needle point and described body by integral forming.

7. eccentric expanded casing according to claim 1, it is characterised in that: the working tube includes main body, the receipts Appearance portion is set to the main body, and the body end is equipped with bevel edge and arc-shaped side, and the bevel edge and the arc-shaped side are collectively formed The end profile of the main body.

8. eccentric expanded casing according to claim 7, it is characterised in that: the working tube further includes grip part, institute It states grip part and is fixed on the main body.

9. eccentric expanded casing according to claim 8, it is characterised in that: the grip part and main body one at Type.