CN110742660A - Lumbar vertebral pedicle positioning retractor - Google Patents

Abstract

The invention relates to a lumbar vertebral pedicle positioning retractor, which comprises a handle part and a retracting part, and is 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 invention has the advantages of ingenious structure, reasonable design and convenient use, can effectively expose the operation field through a smaller incision, conveniently position the needle inlet point of the vertebral pedicle, and effectively avoid the damage to muscle tissues.

Description

Lumbar vertebral pedicle positioning retractor

Technical Field

The invention relates to an instrument for lumbar vertebra operation, in particular to a lumbar vertebra pedicle positioning retractor, and 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 invention aims to overcome the defects in the prior art, and provides a lumbar vertebral pedicle positioning retractor which is ingenious in structure, reasonable in design and convenient to use, can effectively expose an operation field through a small incision, conveniently positions a vertebral pedicle needle inlet point and effectively avoids damage to muscle tissues.

According to the technical scheme provided by the invention: 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 of the invention, 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 invention, the obtuse angle between the handle part and the retracting part is 100-130 degrees.

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

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

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

Compared with the prior art, the invention has the following advantages:

1) the invention has ingenious structure and reasonable design, can effectively expose the operation field through a limited incision in the operation, the V-shaped opening at the front end of the positioning plate stretches across the north-back side of the root part of the corresponding transverse process, one fixing tooth close to the head side of the two fixing teeth is fixed on the outer side of the upper articular process, the needle feeding point of the pedicle of vertebral arch operation is accurately positioned, the stable positioning position is ensured, the slippage is avoided, the longest muscle is prevented from being damaged, a proper space is left for the pedicle of vertebral arch operation, the slippage and the displacement are not easy to occur, and the problems that the conventional ordinary vertebral plate drag hook is easy to slip and unstable in operation and the needle feeding point of the pedicle of; 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 an arc with two upwards bent sides, so that muscle tissues are protected, injury is avoided, and the comfort level of holding of 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 rear end of the handle part of the lumbar vertebral pedicle positioning retractor is bent towards the direction close to the positioning plate to form the circular arc-shaped hook, so that the handle part of the lumbar vertebral pedicle positioning retractor is conveniently pulled outwards.

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

5) The positioning plate and the retracting part of the lumbar vertebral pedicle positioning retractor form an obtuse angle with an inward and upward opening, so that a more abundant operating space can be provided for the vertebral pedicle operation.

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 invention.

Fig. 7 is a second schematic diagram 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 illustrated by the following specific figures 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. Various modifications and alterations may occur to those skilled in the art without departing from the spirit and scope of the invention, and such modifications and alterations should be accorded the broadest interpretation so as to encompass all such modifications and alterations.

Claims (7)

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.

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