CN211460324U

CN211460324U - Lumbar vertebral pedicle positioning retractor

Info

Publication number: CN211460324U
Application number: CN201921926060.0U
Authority: CN
Inventors: 赵建国; 谢平
Original assignee: Zhangjiagang Aoyang Hospital Co ltd
Current assignee: Zhangjiagang Aoyang Hospital Co ltd
Priority date: 2019-11-08
Filing date: 2019-11-08
Publication date: 2020-09-11
Anticipated expiration: 2029-11-08

Abstract

The utility model relates to a lumbar vertebrae pedicle of vertebral arch location retractor, including stalk portion and the portion of pulling out, its characterized in that: the handle part is integrally connected with the retracting part, and an obtuse angle with an outward and downward opening is formed between the handle part and the retracting part; the front end of the retracting part is integrally provided with an upturned positioning plate in an extending manner, and an obtuse angle with an inward and upward opening is formed between the positioning plate and the retracting part; the end part of the positioning plate is provided with a V-shaped opening, the end part of the positioning plate is divided into two symmetrical fixed teeth by the V-shaped opening, the roots of the two fixed teeth are in arc transition, and the tips and the edges of the two fixed teeth are both subjected to arc treatment. The utility model discloses the structure is ingenious, reasonable in design, and convenient to use can effectively show the operation field through less incision, conveniently fixes a position pedicle of vertebral arch needle feeding point, effectively avoids causing the damage to musculature.

Description

Lumbar vertebral pedicle positioning retractor

Technical Field

The utility model relates to an instrument for lumbar vertebra operation, in particular to a lumbar vertebra pedicle of vertebral arch positioning retractor, which belongs to the technical field of medical instruments.

Background

The lumbar vertebra comprises five vertebrae, each vertebra [ see fig. 1 and fig. 2 ] is composed of a front short cylindrical vertebral body I and a rear platy vertebral arch II, the vertebral body I and the vertebral arch II are connected through vertebral pedicles III on two sides, seven bulges are arranged on the vertebral arch II, namely a backward spinous process IV, transverse processes V on two sides, vertebral arch plates VI on two sides, an upward upper articular process VII and a downward lower articular process VIII at the connecting part of the vertebral arch 3, and the transverse processes V and the vertebral arch III are on the same horizontal plane. In lumbar surgery, screws are usually used to fix vertebral pedicle III for treating lumbar spinal stenosis, lumbar spondylolisthesis, and lumbar fractures.

The key to the success of minimally invasive lumbar surgery is that the limited incision is used for accurately exposing and positioning the pedicle of vertebral arch needle insertion point, in the prior art, a screw needs to be screwed in through a gap between the multifidus muscle of lumbar vertebra and the longissimus muscle to implement fixation, namely, the longissimus muscle needs to be pulled out towards the outside by using a tool, the common tool is a single-tooth vertebral plate retractor, and the common tool mainly has the following problems in practical use: (1) easy slipping and unstable fixation; (2) the pedicle of vertebral arch needle insertion point cannot be accurately positioned; (3) the flat plate structure is easy to cut muscle tissue.

Therefore, it is important to design a retractor that is more reliable in fixation, more accurate in positioning, and does not damage muscle tissue.

Disclosure of Invention

The utility model aims to overcome the not enough of existence among the prior art, provide a lumbar vertebrae pedicle of vertebral arch location retractor, its structure is ingenious, reasonable in design, and convenient to use can effectively show the operation wild through less incision, and convenient location pedicle of vertebral arch needle point of entry effectively avoids causing the damage to musculature.

According to the utility model provides a technical scheme: lumbar vertebrae pedicle of vertebral arch location retractor, including stalk portion and the portion of retracting, its characterized in that: the handle part is integrally connected with the retracting part, and an obtuse angle with an outward and downward opening is formed between the handle part and the retracting part; the front end of the retracting part is integrally provided with an upturned positioning plate in an extending manner, and an obtuse angle with an inward and upward opening is formed between the positioning plate and the retracting part; the end part of the positioning plate is provided with a V-shaped opening, the end part of the positioning plate is divided into two symmetrical fixed teeth by the V-shaped opening, the roots of the two fixed teeth are in arc transition, and the tips and the edges of the two fixed teeth are both subjected to arc treatment.

As a further improvement, the rear end of the handle part is bent towards the direction close to the positioning plate to form an arc-shaped hook.

As a further improvement of the utility model, the obtuse angle between the handle part and the retracting part is 100-130 degrees.

As a further improvement of the utility model, the obtuse angle between the retracting part and the positioning plate is 150-175 degrees.

As a further improvement of the utility model, the whole cross section of the lumbar vertebral pedicle positioning retractor is in the shape of a circular arc with two sides bent upwards.

As a further improvement, the curvature R of the whole cross section of the lumbar vertebral pedicle positioning retractor is 2-4.

As a further improvement of the utility model, the whole edge of the lumbar vertebral pedicle positioning retractor is subjected to smoothing treatment.

Compared with the prior art, the utility model, have following advantage:

1) the utility model discloses the structure is ingenious, reasonable in design, can effectively show the operation field through limited incision in the art, the V-arrangement opening of locating plate front end stretches over in the north dorsal part of corresponding transverse process root, a fixed tooth that is close to the head side in two fixed teeth is fixed in the outside of last articular process, accurate location pedicle of vertebral arch operation needle feeding point, ensure that the locating position is firm, can not the slippage, avoid damaging the longissimus muscle, and leave appropriate space for pedicle of vertebral arch operation, difficult slippage aversion, easy slippage when having solved present ordinary vertebral plate drag hook operation, fixed unstable and can not accurate location pedicle of vertebral arch needle feeding point's problem; meanwhile, the root parts of the two fixed teeth are in arc transition, and the tips and the edges of the two fixed teeth are both subjected to arc treatment, so that the vertebra cannot be damaged when the vertebra fixing device is used.

2) The whole cross section of the lumbar vertebral pedicle positioning retractor is in the shape of a circular arc with two sides bent upwards, so that muscle tissues are protected, injury is avoided, and the comfort level for holding by an operator is improved; the whole edge of the lumbar vertebral pedicle positioning retractor is subjected to smooth treatment, so that the injury to muscle tissues caused by scratching can be effectively avoided.

3) The utility model discloses the stalk portion rear end of lumbar vertebrae pedicle of vertebral arch location retractor is buckled to the direction that is close to the locating plate, constitutes convex crotch, is convenient for like this with the stalk portion outside tractive of lumbar vertebrae pedicle of vertebral arch location retractor.

4) The handle part and the retracting part of the lumbar vertebral pedicle positioning retractor of the utility model form an obtuse angle with an outward opening and a downward opening, so that the control of the angle of the vertebral pedicle puncture is convenient.

5) The positioning plate and the retracting part of the lumbar vertebral pedicle positioning retractor of the utility model form an inward and upward obtuse angle, so that the vertebral pedicle operation has more abundant operation space.

Drawings

FIG. 1 is a top view of a single vertebra construct.

Figure 2 is a structural side view of a single vertebra.

Fig. 3 is a front view of the structure of the embodiment of the present invention.

Fig. 4 is a right side view of fig. 3.

Fig. 5 is a schematic perspective view of an embodiment of the present invention.

Fig. 6 is a schematic diagram of a specific application of the embodiment of the present invention.

Fig. 7 is a second schematic view illustrating a specific application of the embodiment of the present invention.

Description of reference numerals: 1-handle part, 2-retracting part, 3-positioning plate, 4-V-shaped opening, 5-fixed tooth, 6-arc hook, I-centrum II-vertebral arch, III-vertebral arch pedicle, IV-spinous process, V-transverse process, VI-vertebral arch plate, VII-superior articular process, VIII-inferior articular process, IX-lumbar multifidus muscle and X-longissimus muscle.

Detailed Description

The invention is further described with reference to the following specific drawings and examples.

As shown in fig. 3 to 5, the embodiment discloses a lumbar pedicle positioning retractor, which comprises a handle part 1 and a retracting part 2, wherein the handle part 1 is integrally connected with the retracting part 2, and an obtuse angle with an outward and downward opening is formed between the handle part 1 and the retracting part 2; the front end of the retracting part 2 is integrally provided with an upturned positioning plate 3 in an extending manner, and an obtuse angle with an inward and upward opening is formed between the positioning plate 3 and the retracting part 2; the end part of the positioning plate 3 is provided with a V-shaped opening 4, the end part of the positioning plate 3 is divided into two symmetrical fixed teeth 5 by the V-shaped opening 4, the roots of the two fixed teeth 5 are in arc transition, and the tips and the edges of the two fixed teeth 5 are both subjected to arc treatment.

As shown in fig. 6 and 7, in specific use, an operator firstly cuts through the gap between the lumbar multifidus muscle IX and the longissimus muscle X to expose the corresponding upper articular process VII and the lateral transverse process V on the outer side, holds the handle part 1 of the lumbar pedicle positioning retractor, inserts the retracting part 2 of the lumbar pedicle positioning retractor, makes the V-shaped opening 4 at the front end of the positioning plate 3 straddle the back side of the root of the lateral process V, and fixes one of the two fixing teeth 5 at the front end of the positioning plate 3, which is close to the head side, on the outer side of the upper articular process VII to prevent slipping; then the handle part 1 of the lumbar vertebral pedicle positioning retractor is retracted outwards in the horizontal position, so that the longissimus X is retracted outwards, the midline of the transverse process V and the outer side edge of the superior articular process VII can be used as needle feeding points, and the puncture and the fixation of the vertebral pedicle III screws are carried out in the abduction 15-degree direction. Like this, at whole operation in-process, V-arrangement opening 4 and two fixed teeth 5's design can accurate location pedicle of vertebral arch operation needle feeding point, ensures that the locating position is firm, can not the slippage. Due to the arc transition between the roots of the two fixed teeth 5, the tips and the edges of the two fixed teeth 5 are both subjected to arc treatment, so that the vertebra cannot be damaged when the vertebra fixing device is used.

As shown in fig. 1, in the present embodiment, the rear end of the shank 1 is bent in a direction approaching the positioning plate 3 to form a circular arc-shaped hook 6. So set up, be convenient for with the outside tractive of stalk portion 1 of lumbar vertebrae pedicle of vertebral arch location retractor.

In this embodiment, since the handle portion 1 and the retracting portion 2 form an obtuse angle with an outward and downward opening, the puncture angle of the pedicle III can be grasped conveniently. Preferably, the obtuse angle between the handle 1 and the retracting part 2 is 110 °, and the obtuse angle can be flexibly set within the range of 100-130 ° in actual manufacturing.

In this embodiment, because the positioning plate 3 and the retracting part 2 form an obtuse angle with an inward and upward opening, a more abundant operating space can be provided for the pedicle surgery. Preferably, the obtuse angle between the retracting part 2 and the positioning plate 3 is 160 °, and the retracting part and the positioning plate can be flexibly arranged within the range of 150 ° to 175 ° in actual manufacturing.

In this embodiment, the overall cross section of the lumbar pedicle positioning retractor is in the shape of a circular arc with two sides bent upwards. So set up, be favorable to protecting musculature, avoid the damage, be favorable to improving the comfort level that the art person gripped simultaneously. Preferably, the curvature R of the whole cross section of the lumbar vertebral pedicle positioning retractor is 2-4, so that the radian when the retractor is held by a palm is matched, and an operator can hold the retractor more comfortably.

In this embodiment, the entire edge of the lumbar pedicle positioning retractor is smoothed. So set up, can effectively avoid causing the fish tail injury to musculature.

The above description is only for the preferred embodiment of the present invention, and the above specific embodiments are not intended to limit the present invention. Within the scope of the technical idea of the present invention, various modifications and alterations can be made, and any person skilled in the art can make modifications, amendments or equivalent replacements according to the above description, all belonging to the protection scope of the present invention.

Claims

1. Lumbar vertebrae pedicle of vertebral arch location retractor, including stalk portion (1) and the portion of retracting (2), its characterized in that: the handle part (1) is integrally connected with the retracting part (2), and an obtuse angle with an outward downward opening is formed between the handle part (1) and the retracting part (2); the front end of the retracting part (2) is integrally provided with a raised positioning plate (3) in an extending manner, and an obtuse angle with an inward and upward opening is formed between the positioning plate (3) and the retracting part (2); the end part of the positioning plate (3) is provided with a V-shaped opening (4), the end part of the positioning plate (3) is divided into two symmetrical fixed teeth (5) by the V-shaped opening (4), the roots of the two fixed teeth (5) are in arc transition, and the tips and the edges of the two fixed teeth (5) are subjected to arc treatment.

2. The lumbar pedicle positioning retractor of claim 1, wherein: the rear end of the handle part (1) is bent towards the direction close to the positioning plate (3) to form a circular arc-shaped hook (6).

3. The lumbar pedicle positioning retractor of claim 1, wherein: the obtuse angle between the handle part (1) and the retracting part (2) is 100-130 degrees.

4. The lumbar pedicle positioning retractor of claim 1, wherein: the obtuse angle between the retracting part (2) and the positioning plate (3) is 150-175 degrees.

5. The lumbar pedicle positioning retractor according to any one of claims 1-4, wherein: the whole cross section of the lumbar vertebral pedicle positioning retractor is in the shape of a circular arc with two sides bent upwards.

6. The lumbar pedicle positioning retractor of claim 5, wherein: the curvature R of the whole cross section of the lumbar vertebral pedicle positioning retractor is 2-4.

7. The lumbar pedicle positioning retractor of claim 1, wherein: the whole edge of the lumbar vertebral pedicle positioning retractor is subjected to smoothing treatment.