Semi-automatic nerve root retractor for lumbar interbody fusion surgery

Abstract

The utility model provides a semi-automatic nerve root draw hook for lumbar interbody fusion surgery, which comprises a hook rod, the hook rod is integrally formed by a telescopic hook rod and a hook clamp, the hook rod is an inequilateral U-shaped rod, the long side of the U-shaped rod is connected with a sub-rod, and the sub-rod is stretched by changing the position of the sub-rod on the long side of the U-shaped rod; the hook clamp is a short edge of the U-shaped rod; a hook mouth is arranged at the end, away from the hook rod, of the auxiliary rod and is a duckbilled hook piece, the hook piece is of an L-shaped structure, and the included angle of the L-shaped structure is an obtuse angle. According to the utility model, the telescopic hook rod is adopted, so that the height can be effectively adjusted, and the problem that spinous process heights of different patients with different body types are different is solved; the duckbilled hook sheet with an obtuse included angle is adopted, so that a larger surgical field is provided; the hook clamp can be effectively fixed to the spinous process, assistants can be liberated, more operation space is guaranteed for an operator, and the operation certainty is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of medical instruments, in particular to a semi-automatic nerve root retractor for lumbar intervertebral fusion surgery. Background Art

[0002] The nerve root retractor is mainly used in posterior lumbar discectomy + interbody fusion surgery. It is used by the first assistant to retract the nerve root to ensure sufficient space for fusion cage placement.

[0003] Currently, the hook rod and handle of most nerve root retractors are at right angles, which has the following technical defects: during the transforaminal approach, it is difficult for the assistant to see the contralateral structure due to the obstruction of the spinous process. The assistant can only judge whether the nerve root retractor has been effectively passed by feeling, which can easily lead to repeated adjustments during the operation and even operator errors.

[0004] Therefore, how to design a semi-automatic nerve root retractor for lumbar interbody fusion surgery has become an urgent problem to be solved. Utility Model Content

[0005] In view of the problems existing in the prior art, the present invention provides a semi-automatic nerve root retractor for lumbar intervertebral fusion surgery to solve at least one of the above technical problems.

[0006] The technical solution of the utility model is: a semi-automatic nerve root retractor for lumbar intervertebral fusion surgery, comprising a hook rod, wherein the hook rod is formed of a retractable hook rod and a hook clamp in one piece, the hook rod is an unequal-sided U-shaped rod, the long side of the U-shaped rod is connected to the sub-rod, and the sub-rod is retracted by changing its position on the long side of the U-shaped rod; the hook clamp is the short side of the U-shaped rod; a hook beak is provided at one end of the sub-rod away from the hook rod, the hook beak is a duckbill-shaped hook piece, the hook piece is an L-shaped structure, and the angle of the L-shaped structure is an obtuse angle.

[0007] The utility model adopts a retractable hook rod, which can effectively adjust the height, solving the problem of different spinous process heights in different patients with different body shapes; it adopts a duckbill-shaped hook piece with an obtuse angle to provide a larger surgical field of view; it adopts a hook clamp that can be effectively fixed to the spinous process, freeing up the assistant, ensuring more surgical operating space for the surgeon, and increasing surgical certainty. BRIEF DESCRIPTION OF THE DRAWINGS

[0008] Figure 1 It is a structural diagram of the present utility model.

[0009] Figure 2 It is a right side view of the hook rod of the present utility model.

[0010] Figure 3 This is a schematic diagram of the internal structure of the sub-rod of the present utility model.

[0011] In the figure: 1. Hook rod; 2. Sub-rod; 3. V-shaped single-end spring; 101. Hook clamp; 102. Round hole; 201. Hook mouth. DETAILED DESCRIPTION

[0012] The present invention will be further described below with reference to the accompanying drawings.

[0013] See Figure 1-3 The structures, proportions, sizes, etc. illustrated in the drawings of this specification are only used to match the contents disclosed in the specification for people familiar with this technology to understand and read. They are not used to limit the conditions for the implementation of this utility model, so they have no substantial technical significance. Any modification of the structure, change in the proportional relationship or adjustment of the size should still fall within the scope of the technical content disclosed by this utility model without affecting the efficacy and purpose that can be achieved by this utility model. At the same time, the terms such as "upper", "lower", "left", "right", "middle" and "one" quoted in this specification are only for the convenience of description and are not used to limit the scope of the implementation of this utility model. Changes or adjustments in their relative relationships should also be regarded as the scope of the implementation of this utility model without substantially changing the technical content.

[0014] Example 1: A semi-automatic nerve root retractor for lumbar intervertebral fusion surgery, referring to Figure 1 The invention comprises a hook rod 1, which is formed integrally of a retractable hook rod and a hook clamp 101. The hook rod 1 is an unequal-sided U-shaped rod, the long side of which is connected to a sub-rod 2. The sub-rod 2 is retractable by changing its position on the long side of the U-shaped rod. The hook clamp 101 is the short side of the U-shaped rod. The end of the sub-rod 2 away from the hook rod 1 is provided with a hook beak 201. The hook beak 201 is a duckbill-shaped hook piece with an L-shaped structure and an obtuse angle. The utility model adopts a retractable hook rod, which can effectively adjust the height, solving the problem of different spinous process heights in different patients with different body shapes. The duckbill-shaped hook piece with an obtuse angle provides a larger surgical field of view. The hook clamp can be effectively fixed to the spinous process, freeing up assistants, ensuring more surgical operating space for the surgeon, and increasing surgical certainty.

[0015] Example 2: Based on Example 1, refer to Figure 2 、 Figure 3The long side of the U-shaped rod, away from the short side, is provided with several spaced circular holes 102. A V-shaped single-ended spring piece 3 is provided at one end of the sub-rod 2. The ball of the V-shaped single-ended spring piece 3 is exposed from the sub-rod 2 and can be matched with the circular hole 102. The multiple circular holes 102 all match the diameter of the ball. The utility model uses commercially available V-shaped single-ended spring pieces. After the ball of the V-shaped single-ended spring piece is exposed from the sub-rod, it is matched with the circular hole on the U-shaped rod. The expansion and contraction are achieved by riveting the ball. When adjustment is required, the ball is pressed down, which can be expanded and contracted. It can be matched with the circular hole in different positions, and the height can be effectively adjusted, which solves the problem of different spinous process heights in different patients with different body shapes.

[0016] Example 3: Based on Example 1, the hook piece is composed of two elastic leaves, one of which is provided with a sharp tip at the end, which can be effectively fixed to the spinous process. This utility model uses two elastic leaves to form a hook piece, one of which is provided with a sharp tip at the end, which can be effectively fixed to the spinous process, freeing up assistants, ensuring more operating space for the surgeon, and increasing surgical certainty.

[0017] Example 4: Based on Example 3, the tip is a raised right-angled triangular plate, with the tip facing the long side of the U-shaped rod. This utility model uses a right-angled triangular plate with the tip facing the long side of the U-shaped rod, which can effectively fix it to the spinous process, freeing up assistants, ensuring more surgical operating space for the surgeon, and increasing surgical certainty.

[0018] Example 5: Based on Example 1, the hook tip is blunt, curved, and smooth, with a width of 0.8 cm and a length of 1.5 cm. The hook tip of the utility model is blunt, curved, and smooth, with a width of 0.8 cm and a length of 1.5 cm, and is used to retract the dural sac, epidural fat, and nerve roots to compress and stop bleeding.

[0019] Example 6: Based on Example 5, the horizontal and vertical plates of the L-shaped structure are curved, the horizontal plate length is 0.2 cm, and the angle of the L-shaped structure is 110°. This utility model uses a duckbill-shaped hook with an angle of 110° and a horizontal plate length of 0.2 cm, which is used to retract the dural sac, epidural fat, and nerve roots to compress and stop bleeding.

[0020] In specific implementation, when performing lumbar interbody fusion via the intervertebral foramen, the length of the retractable hook rod is first adjusted by pressing down the ball to match the distance from the spinous process to the intervertebral disc surface, and then the hook mouth 201 is aligned with the part that needs to be pulled, and then the hook clamp 101 is fixed to the appropriate position of the spinous process. After the operation is completed, the interbody fusion device is inserted.

[0021] The above is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the principles of the present invention. These improvements and modifications should also be regarded as within the scope of protection of the present invention.

Claims

1. A semi-automatic nerve root retractor for lumbar intervertebral fusion surgery, comprising a hook rod (1), characterized in that: The hook rod (1) is formed integrally of a retractable hook rod and a hook clamp (101); the hook rod (1) is an unequal-sided U-shaped rod, the long side of the U-shaped rod is connected to the sub-rod (2), and the sub-rod (2) is retracted by changing its position on the long side of the U-shaped rod; the hook clamp (101) is the short side of the U-shaped rod; a hook beak (201) is provided at one end of the sub-rod (2) away from the hook rod (1); the hook beak (201) is a duckbill-shaped hook piece, the hook piece is an L-shaped structure, and the angle of the L-shaped structure is an obtuse angle.

2. The semi-automatic nerve root retractor for lumbar intervertebral fusion surgery according to claim 1, characterized in that: A plurality of circular holes (102) arranged at intervals are provided on the side of the long side of the U-shaped rod away from the short side, and a V-shaped single-head spring piece (3) is provided at one end inside the sub-rod (2). The ball of the V-shaped single-head spring piece (3) is exposed from the sub-rod (2) and can be matched with the circular hole (102).

3. The semi-automatic nerve root retractor for lumbar intervertebral fusion surgery according to claim 1, characterized in that: The hook piece is composed of two elastic leaves, one of which is provided with a tip at the end, and the tip can be effectively fixed to the spinous process.

4. The semi-automatic nerve root retractor for lumbar interbody fusion surgery according to claim 3, characterized in that: The tip is a raised right-angled triangular plate, with the tip facing one side of the long side of the U-shaped rod.

5. The semi-automatic nerve root retractor for lumbar interbody fusion surgery according to claim 1, characterized in that: The tip of the hook piece is round, blunt, arc-shaped and smooth, and the width of the hook piece is 0.8 cm and the length is 1.5 cm.

6. The semi-automatic nerve root retractor for lumbar interbody fusion surgery according to claim 5, characterized in that: The horizontal plate and the vertical plate of the L-shaped structure are curved in an arc shape, the length of the horizontal plate of the L-shaped structure is 0.2 cm, and the angle of the L-shaped structure is 110°.

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