A pedicle puncture auxiliary adjustment device and method

Abstract

This invention relates to the field of medical device technology, and particularly to a pedicle puncture auxiliary adjustment device and method, comprising an outer sleeve with an axially eccentrically arranged first guide hole and second guide hole, wherein a first puncture needle is inserted through the first guide hole and the two can rotate relative to each other; an inner sleeve, inserted through the second guide hole and rotatably engaged with it, wherein the inner sleeve has an axially eccentrically arranged third guide hole for inserting a second puncture needle; the distance between the first puncture needle and the second puncture needle is adjusted by rotating the inner sleeve; the invention, through the rotational adjustment of the inner sleeve and the outer sleeve, ensures that the angle and distance between the second puncture needle and the first puncture needle meet the requirements, thereby obtaining the optimal nail placement position.

Description

Technical Field

[0001] This invention relates to the field of medical device technology, and in particular to a pedicle puncture auxiliary adjustment device and method. Background Technology

[0002] Percutaneous pedicle screw fixation is a common surgical procedure for maintaining spinal stability during spinal surgery. During screw placement, a puncture needle and guide wire are first used to locate the pedicle and determine the optimal screw placement position.

[0003] Current percutaneous pedicle puncture techniques require manual operation by medical personnel, with fluoroscopy used to determine the surface projection of the pedicle. However, in practice, anteroposterior fluoroscopy often reveals deviations in the needle insertion point, especially in cases of severe facet joint hyperplasia, where needle slippage is highly likely. Adjusting for these deviations requires repeated fluoroscopy, rerouting the puncture site and path, but this presents several problems. Firstly, due to small deviations (only 1-5 mm), rerouting is difficult, requiring multiple attempts to achieve the desired result, easily leading to puncture-related complications. Secondly, repeated fluoroscopy with multiple punctures carries the significant risk of radiation exposure, potentially causing irreversible harm to both the patient and the physician. Summary of the Invention

[0004] The purpose of this invention is to provide an auxiliary adjustment device and method for pedicle puncture, to solve the problem that it is difficult to adjust after deviations occur in existing pedicle puncture positioning. To achieve the above objective, this invention provides the following technical solution:

[0005] In a first aspect, the present invention provides a pedicle puncture auxiliary adjustment device, comprising:

[0006] The outer sleeve has a first guide hole and a second guide hole eccentrically arranged in the axial direction. The first guide hole is used to insert a first puncture needle that mates with it, and the two can rotate relative to each other.

[0007] The inner sleeve is inserted into the second guide hole and rotates with it. The inner sleeve is axially eccentrically configured with a third guide hole for inserting the second puncture needle. The distance between the first puncture needle and the second puncture needle can be adjusted by rotating the inner sleeve.

[0008] As a further technical solution, a limiting structure is provided between the inner sleeve and the second guide hole.

[0009] As a further technical solution, the limiting structure is a type-fitting structure.

[0010] As a further technical solution, the second guide hole is provided with internal teeth, and the inner sleeve is provided with external teeth that cooperate with the internal teeth. The internal teeth and the external teeth form the limiting structure.

[0011] As a further technical solution, the internal teeth are located at the end of the outer sleeve, and the inner diameter is larger than the second guide hole.

[0012] As a further technical solution, the end of the outer sleeve is provided with a first guide portion, the first guide hole penetrates the first guide portion, and the outer diameter of the first guide portion is smaller than that of the outer sleeve.

[0013] As a further technical solution, the inner sleeve end is provided with a second guide portion, the third guide hole penetrates the second guide portion, and the outer diameter of the second guide portion is smaller than that of the inner sleeve.

[0014] As a further technical solution, the first guide portion and the second guide portion are respectively located at opposite ends of the limiting structure.

[0015] As a further technical solution, the center of the first guide hole and the center of the second guide hole are on the same diameter.

[0016] Secondly, the adjustment method of the pedicle puncture adjustment device as described in the first aspect includes the following steps:

[0017] After the first puncture, the first puncture needle is inserted to position the outer sleeve, which is used as a reference.

[0018] Based on the fluoroscopic results, rotate and adjust the outer sleeve and inner sleeve so that the third guide hole of the inner sleeve is rotated to the desired ideal puncture position. Insert the second puncture needle through the third guide hole, and the position of the second puncture needle is the optimal nail placement position.

[0019] The beneficial effects of the present invention are as follows:

[0020] (1) After the outer sleeve and the first puncture needle are punctured, the positioning reference is formed. The outer sleeve can rotate around the first puncture needle. When rotating, it can drive the inner sleeve to move together. At the same time, due to the eccentric setting of the third guide hole in the inner sleeve, the distance between the central axis of the third guide hole and the central axis of the first guide hole can be adjusted during the rotation relative to the outer sleeve. That is, the distance between the first puncture needle and the second puncture needle. Under the rotation adjustment of the inner sleeve and the outer sleeve, the angle and distance of the second puncture needle relative to the first puncture needle meet the requirements and the optimal nail placement position is obtained.

[0021] (2) The present invention is provided with a limiting structure. After the inner and outer sleeves are rotated and adjusted, the second puncture needle can be limited to prevent the second puncture needle from rotating relative to the third guide hole, thus ensuring the stability after insertion.

[0022] (3) The pedicle puncture auxiliary adjustment device of the present invention can be used not only for the fine adjustment process of pedicle puncture, but also for the fine adjustment puncture process of all orthopedic related punctures, such as the fine adjustment process of spinal endoscopy puncture and the fine adjustment process of orthopedic biopsy; it can enlarge the diameter of the puncture hole in the inner and outer sleeves so that the puncture needle can pass through the hole, and can be applied to patients with difficult puncture and nail placement under open conditions. Attached Figure Description

[0023] The accompanying drawings, which form part of this specification, are used to provide a further understanding of the invention. The illustrative embodiments of the invention and their descriptions are used to explain the invention and do not constitute a limitation thereof. It should also be understood that these drawings are for simplicity and clarity and are not necessarily drawn to scale. The invention will now be described and explained with additional features and details using the drawings, wherein:

[0024] Figure 1 A front view schematic diagram of the outer sleeve structure in an embodiment of the present invention is shown;

[0025] Figure 2 A side view of the outer sleeve structure in an embodiment of the present invention is shown;

[0026] Figure 3 A front view schematic diagram of the inner sleeve structure in an embodiment of the present invention is shown;

[0027] Figure 4 A side view of the inner sleeve structure in an embodiment of the present invention is shown.

[0028] In the figure: 1. Outer sleeve; 2. First guide hole; 3. First guide part; 4. Second guide hole; 5. Internal tooth; 6. Inner sleeve; 7. External tooth; 8. Third guide hole; 9. Second guide part. Detailed Implementation

[0029] The technical solutions in typical embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings.

[0030] Example 1

[0031] like Figures 1-4 As shown, this embodiment provides a pedicle puncture auxiliary adjustment device, including an outer sleeve 1, an inner sleeve 6, and a first puncture needle and a second puncture needle inserted therein.

[0032] Among them, such as Figure 1 and Figure 2 As shown, the outer sleeve 1 is axially eccentrically provided with a first guide hole 2 and a second guide hole 4. The first guide hole 2 is inserted into the first puncture needle that cooperates with it, and the two can rotate relative to each other.

[0033] like Figure 3 and Figure 4As shown, the inner sleeve 6 is inserted into the second guide hole 4 and rotates with it. The inner sleeve 6 is axially eccentrically provided with a third guide hole 8 for inserting the second puncture needle. The distance between the first puncture needle and the second puncture needle can be adjusted by rotating the inner sleeve 6.

[0034] This embodiment is primarily designed for processes where the initial puncture point or puncture path is not ideal, requiring fine-tuning of the puncture channel. Using the initial puncture path as a reference, the desired puncture effect is achieved with the assistance of the adjustment device in this embodiment.

[0035] After the outer sleeve 1 and the first puncture needle are inserted, a positioning reference is formed. The outer sleeve 1 can rotate around the first puncture needle, and during rotation, it can drive the inner sleeve 6 to move together. At the same time, due to the eccentric setting of the third guide hole 8 in the inner sleeve 6, the distance between the central axis of the third guide hole 8 and the central axis of the first guide hole 2 can be adjusted during rotation relative to the outer sleeve 1, that is, the distance between the first puncture needle and the second puncture needle. Under the rotation adjustment of the inner sleeve 6 and the outer sleeve 1, the angle and distance of the second puncture needle relative to the first puncture needle meet the requirements, and the optimal nail placement position is obtained. The angle mentioned here refers to the position angle of the line connecting the two puncture needles on the adjustment plane. In addition, the distance adjustment is completed by rotating the inner sleeve, and the angle adjustment can be completed by the outer sleeve and / or the inner sleeve (the angle of the inner sleeve is also adjusted during the rotation adjustment of the distance), but the outer sleeve is the main one.

[0036] However, more often, the distance between the two puncture needles is adjusted by rotating the inner sleeve, and the angle is adjusted by rotating the outer sleeve.

[0037] With the first puncture needle providing precise positioning, the inner and outer sleeves can be fixed when the second puncture needle is inserted to prevent the second puncture needle from sliding or shifting again, ensuring stable and accurate positioning.

[0038] The center of the first guide hole 2 and the center of the second guide hole 4 are on the same diameter, which helps to expand the adjustment range of the distance between the two puncture needles. In order to meet the requirements, the distance adjustment range is set to 1-5mm, and any distance within this adjustment range can be obtained.

[0039] A limiting structure is provided between the inner sleeve 6 and the second guide hole 4. The limiting structure is a type-fit structure.

[0040] With the setting of a limiting structure, after the inner and outer sleeves have been rotated and adjusted, the inserted second puncture needle can be limited to prevent relative rotation of the second puncture needle with respect to the third guide hole, thus ensuring stability after insertion.

[0041] In this embodiment, the second guide hole 4 is provided with internal teeth 5, and the inner sleeve 6 is provided with external teeth 7 that mate with the internal teeth 5. The internal teeth 5 and the external teeth 7 form a limiting structure. In other embodiments, it can also be designed as a quadrilateral, octagon, dodecagon, etc., and is not limited to the tooth-shaped mating structure in this embodiment.

[0042] In this embodiment, the first guide portion 3 and the second guide portion 9 are located at the same end, and are located at opposite ends from the limiting structure, that is, the first guide portion 3 and the second guide portion 9 are at one end, and the limiting structure is at the other end.

[0043] The inner teeth 5 are located at the end of the outer sleeve 1, and the inner diameter is larger than the second guide hole 4. This means that the inner teeth 5 and the second guide hole 4 form a stepped structure. After the second puncture needle is inserted to a certain depth, it is limited by this stepped structure.

[0044] The outer sleeve 1 has a first guide portion 3 at its end, and a first guide hole 2 passes through the first guide portion 3. The outer diameter of the first guide portion 3 is smaller than that of the outer sleeve 1. The inner sleeve 6 has a second guide portion 9 at its end, and a third guide hole 8 passes through the second guide portion 9. The outer diameter of the second guide portion 9 is smaller than that of the inner sleeve 6. To facilitate puncture, the first guide portion 3 and the second guide portion 9 are provided to guide the puncture needle.

[0045] Example 2

[0046] This embodiment provides an adjustment method for the pedicle puncture adjustment device as described in Embodiment 1, characterized by including the following steps:

[0047] After the first puncture, the first puncture needle is inserted to position the outer sleeve 1, which is used as a reference.

[0048] Based on the fluoroscopic results, rotate and adjust the outer sleeve 1 and the inner sleeve 6 so that the third guide hole 8 of the inner sleeve 6 is rotated to the desired ideal puncture position (the angle and spacing of the two puncture needles meet the requirements). The second puncture needle is then inserted through the third guide hole 8, and the position of the second puncture needle is the optimal nail placement position.

[0049] Although the present invention has been disclosed above with reference to preferred embodiments, it is not intended to limit the present invention. Any person skilled in the art can make possible changes and modifications to the technical solutions of the present invention by utilizing the methods and techniques disclosed above without departing from the spirit and scope of the present invention. Therefore, any simple modifications, equivalent changes and alterations made to the above embodiments based on the technical essence of the present invention without departing from the content of the technical solutions of the present invention shall fall within the protection scope of the technical solutions of the present invention.

Claims

1. A pedicle puncture auxiliary adjustment device, characterized in that, include: The outer sleeve has a first guide hole and a second guide hole eccentrically arranged in the axial direction. The first guide hole is used to insert a first puncture needle that mates with it, and the two can rotate relative to each other. An inner sleeve is inserted into the second guide hole and rotates therewith. The inner sleeve is axially eccentrically positioned with a third guide hole for inserting the second puncture needle. The distance between the first puncture needle and the second puncture needle is adjusted by rotating the inner sleeve. A limiting structure is provided between the inner sleeve and the second guide hole. The limiting structure is a form-fit structure. The second guide hole has internal teeth, and the inner sleeve has external teeth that mate with the internal teeth. The internal teeth and the external teeth form the limiting structure.

2. The pedicle puncture auxiliary adjustment device as described in claim 1, characterized in that, The inner teeth are located at the end of the outer sleeve, and their inner diameter is larger than that of the second guide hole.

3. The pedicle puncture auxiliary adjustment device as described in claim 1, characterized in that, The outer sleeve has a first guide portion at its end, and the first guide hole passes through the first guide portion. The outer diameter of the first guide portion is smaller than that of the outer sleeve.

4. The pedicle puncture auxiliary adjustment device as described in claim 3, characterized in that, The inner sleeve has a second guide portion at its end, and the third guide hole penetrates the second guide portion. The outer diameter of the second guide portion is smaller than that of the inner sleeve.

5. The pedicle puncture auxiliary adjustment device as described in claim 4, characterized in that, The first guide portion and the second guide portion are located at opposite ends of the limiting structure.

6. The pedicle puncture auxiliary adjustment device as described in claim 1, characterized in that, The center of the first guide hole and the center of the second guide hole are on the same diameter.

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