Positioning guider for lumbar nerve root puncture minimally invasive surgery

Abstract

The utility model discloses a positioning guider for lumbar nerve root puncture minimally invasive surgery, which comprises a soft bottom plate and a puncture seat, a counter bore is arranged on the surface of the soft bottom plate, and an adjusting mechanism capable of moving along the radial direction of the counter bore is arranged on the surface of the soft bottom plate; the adjusting mechanism comprises a connecting seat, the connecting seat is of a cylindrical groove structure, the bottom of the connecting seat axially protrudes to form a connecting column, the end, away from the connecting seat, of the peripheral face of the connecting column radially protrudes to form a limiting ring, and axially-through puncture holes are formed in the bottom of the connecting seat and the end face of the connecting column. External threads are formed on the peripheral surface of the puncture seat close to one end and are in threaded connection with the connecting seat; a puncture needle clamping seat is movably arranged in the puncture seat, the puncture needle clamping seat is of a hollow cylindrical structure, and a plurality of groups of clamping mechanisms are uniformly arranged on the inner circumferential surface of the puncture needle clamping seat at intervals in the circumferential direction and are used for clamping a puncture needle. The lumbar puncture needle is convenient to operate, the puncture needle can be conveniently aligned with a puncture target spot, the puncture speed is conveniently controlled, and the lumbar puncture precision is effectively improved.

Description

Technical Field

[0001] The utility model relates to the technical field of medical instruments, in particular to a positioning guide for minimally invasive lumbar nerve root puncture. Background Art

[0002] Minimally invasive lumbar nerve root puncture is one of the commonly used examination methods in clinical neurology. It is now widely used in clinical diagnosis and treatment of subarachnoid hemorrhage, central nervous system infectious diseases, intrathecal injection therapy, arterial and venous puncture, nerve block, etc., and has important value in the diagnosis and treatment of neurological diseases.

[0003] At present, lumbar puncture technology is usually performed blindly. During the puncture, medical staff need to concentrate and have skilled operation experience to find the puncture target. After finding the puncture target, the puncture needle is accurately inserted into the diseased tissue for treatment or pathological examination of the tissue. If the position of the puncture needle and the puncture target is inaccurate during puncture, it may cause pain to the patient or other medical accidents. However, even experienced medical staff find it difficult to guarantee the accuracy of the puncture. The success rate is closely related to factors such as the operator's proficiency and the tissue structure of the puncture site. There are disadvantages such as low puncture success rate and many complications, which increase the pain of the patient.

[0004] With the advancement of science and technology, puncture under the guidance of fiber optic endoscope can reduce damage to a certain extent. However, in actual injuries, the puncture speed of the puncture needle cannot be controlled, which makes it difficult to control the puncture depth of the puncture needle and the puncture accuracy is low. Utility Model Content

[0005] In view of the above-mentioned deficiencies of the prior art, the technical problem to be solved by the present invention is: how to provide a positioning guide for minimally invasive lumbar nerve root puncture that facilitates the puncture needle to aim at the puncture target and conveniently controls the puncture speed, so as to effectively improve the accuracy of lumbar puncture.

[0006] In order to solve the above technical problems, the utility model adopts the following technical solutions:

[0007] A positioning guide for minimally invasive lumbar nerve root puncture comprises a soft bottom plate and a puncture seat, a countersunk hole is opened on the surface of the soft bottom plate, and an adjustment mechanism that can move radially along the countersunk hole is provided; the adjustment mechanism comprises a connecting seat, which is a cylindrical slot structure, and a connecting column is axially protruded at the bottom of the connecting seat, and its outer diameter is smaller than the inner diameter of the small-diameter section of the countersunk hole, and is inserted into the countersunk hole, and a limiting ring is radially protruded at one end of the outer peripheral surface of the connecting column away from the connecting seat, and its outer diameter is smaller than the inner diameter of the large-diameter section of the countersunk hole. The thickness is the same as the depth of the large-diameter section of the countersunk hole. An axially through puncture hole is provided at the bottom of the connecting seat and the end face of the connecting column for the puncture needle to pass through; an internal thread is provided on the groove wall of the connecting seat, and the puncture seat is a hollow cylindrical structure. An external thread is provided on the outer peripheral surface of the puncture seat near one end thereof and is threadedly connected to the connecting seat; a puncture needle clamping seat is movably provided in the puncture seat, and the puncture needle clamping seat is a hollow cylindrical structure. A plurality of clamping mechanisms are evenly spaced circumferentially on the inner peripheral surface of the puncture needle clamping seat for clamping the puncture needle.

[0008] Furthermore, a locking external thread is provided on the outer peripheral surface of the connecting column, and a locking nut is sleeved on the connecting column between the connecting seat and the soft bottom plate and is threadedly connected to the connecting column to lock the adjustment mechanism after moving into position.

[0009] Furthermore, a transverse scale line and a longitudinal scale line are respectively arranged on the surface of the soft bottom plate, and the intersection of the two scale lines is located on the center line of the countersunk hole.

[0010] Furthermore, an internal puncture thread is provided on the inner circumference of the puncture seat, and an external puncture thread is provided on the outer circumference of the puncture needle clamping seat, and the puncture needle clamping seat is threadedly connected to the puncture seat; a twisting ring is formed on the end of the puncture needle clamping seat that protrudes radially away from the connecting seat, and convex teeth are evenly arranged on the outer circumferential surface of the twisting ring.

[0011] Furthermore, each group of clamping mechanisms includes a positioning column, one end of which is fixedly connected to the inner circumference of the puncture needle clamping seat, the other end of the positioning column is provided with an axially penetrating sliding groove, and a sliding column is slidably provided, an arc-shaped clamping block is provided at the end of the sliding column away from the positioning column, a return spring is sleeved on the positioning column, one end of the return spring abuts against the inner circumference of the puncture needle clamping seat, and the other end abuts against the arc-shaped clamping block; all groups of arc-shaped clamping blocks are combined to form a circular ring for clamping the puncture needle.

[0012] Furthermore, both ends of the arc-shaped clamping block facing the puncture needle clamping seat in the axial direction are rounded.

[0013] Furthermore, parallel planes are provided on the outer peripheral surface of the puncture seat to facilitate twisting of the puncture seat.

[0014] Furthermore, an adhesive member is provided on the lower surface of the soft bottom plate for fixing the soft bottom plate.

[0015] Furthermore, the adhesive component includes an adhesive layer and a release paper layer which are sequentially arranged on the lower surface of the soft bottom plate.

[0016] Compared with the prior art, the beneficial effects of the utility model are:

[0017] 1. The utility model has a simple structure and is easy to operate. A countersunk hole is opened on the surface of the soft bottom plate, and an adjustment mechanism that can move radially along the countersunk hole is provided. The adjustment mechanism is fine-tuned to move the countersunk hole in four directions on the surface of the soft bottom plate, front, back, left, and right, so as to position the puncture hole and the puncture target point. The puncture needle is clamped by multiple groups of clamping mechanisms that are evenly spaced circumferentially on the inner circumference of the puncture needle clamping seat, so that the clamped puncture needle always keeps the same axis as the puncture hole, so as to facilitate the puncture needle to align with the puncture target point, so as to improve the puncture precision and ensure the accuracy of the puncture. The puncture seat and the connecting seat are connected by threads, which is convenient for disassembly and assembly on the one hand, and allows the operator to observe the position of the puncture target point through the puncture hole under direct vision on the other hand. At the same time, the difficulty of puncture is further reduced.

[0018] 2. In the utility model, the puncture needle holder is threadedly connected to the puncture seat, so that the puncture needle holder is rotated to move axially in the puncture seat, thereby ensuring the falling speed and stability of the puncture needle during the puncture process and further improving the puncture accuracy.

[0019] 3. The utility model forms a circular ring surrounded by all groups of arc-shaped clamping blocks, which is used to clamp the puncture needle. When the puncture needle is inserted into the circular ring formed by all groups of arc-shaped clamping blocks, the inner diameter of the circular ring becomes larger, and the reset spring is compressed. The pressure of the reset spring makes all groups of arc-shaped clamping blocks fit with the outer peripheral surface of the puncture needle, thereby ensuring the stability of the puncture needle when being clamped; at the same time, the inner diameter of the circular ring changes with the diameter of the puncture needle, and is also suitable for clamping puncture needles of various specifications. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] In order to make the purpose, technical solution and advantages of the utility model clearer, the utility model will be further described in detail below with reference to the accompanying drawings, in which:

[0021] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0022] Figure 2 for Figure 1 Middle AA section view;

[0023] Figure 3 for Figure 2 Enlarged schematic diagram of point B in the middle.

[0024] In the figure: 1. soft bottom plate; 2. puncture seat; 3. countersunk hole; 4. connecting seat; 5. connecting column; 6. limiting ring; 7. puncture hole; 8. puncture needle clamping seat; 9. locking nut; 10. horizontal scale line; 11. vertical scale line; 12. twisting ring; 13. positioning column; 14. sliding column; 15. arc clamping block; 16. reset spring; 17. adhesive layer; 18. release paper layer. DETAILED DESCRIPTION

[0025] In the description of the present invention, it should be understood that the terms "upper", "lower", "front", "back", "left", "right", "top", "bottom", "inside", "outside" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the drawings, which are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the referred parts must have a specific position, and a specific position structure and operation. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be specifically understood, and therefore cannot be understood as limiting the present invention. The present invention is further described in detail below in conjunction with the drawings.

[0026] like Figure 1 and Figure 2 As shown, in this embodiment, a positioning guide for minimally invasive lumbar nerve root puncture is provided, including a horizontally placed soft bottom plate 1 and a puncture seat 2, a countersunk hole 3 is opened on the surface of the soft bottom plate, and an adjustment mechanism that can move radially along the countersunk hole is provided; the adjustment mechanism includes a connecting seat 4, the connecting seat is a cylindrical slot structure, and its notch faces upward, and a connecting column 5 is axially protruded at the bottom of the connecting seat, and its outer diameter is smaller than the inner diameter of the small-diameter section of the countersunk hole, and is inserted into the countersunk hole, and a limiting ring 6 is radially protruded on the outer peripheral surface of the connecting column away from one end of the connecting seat, and its outer diameter is smaller than the inner diameter of the large-diameter section of the countersunk hole. The inner diameter of the diameter section, and the thickness is the same as or less than the depth of the large-diameter section of the countersunk hole. An axially through puncture hole 7 is provided at the bottom of the connecting seat and the end face of the connecting column for the puncture needle to pass through; an internal thread is provided on the groove wall of the connecting seat, and the puncture seat is a hollow cylindrical structure. An external thread is provided on the outer circumferential surface of the puncture seat near one end thereof, and is threadedly connected to the connecting seat; a puncture needle clamping seat 8 is movably provided in the puncture seat 2, and the puncture needle clamping seat is a hollow cylindrical structure. A plurality of clamping mechanisms are evenly spaced circumferentially on the inner circumferential surface of the puncture needle clamping seat for clamping the puncture needle.

[0027] The utility model adopts a soft bottom plate to avoid discomfort to the patient; a countersunk hole is opened on the surface of the soft bottom plate, and an adjustment mechanism that can move radially along the countersunk hole is provided. The adjustment mechanism is fine-tuned to move the soft bottom plate in four directions, front, back, left, and right, to position the puncture hole and the puncture target point. The puncture needle is clamped by multiple groups of clamping mechanisms evenly spaced circumferentially on the inner circumference of the puncture needle clamping seat, so that the clamped puncture needle always keeps the same axis as the puncture hole, so that the puncture needle is easy to align with the puncture target point, so as to improve the puncture precision and ensure the accuracy of the puncture. The puncture seat and the connecting seat are connected by threads, which is convenient for disassembly and assembly on the one hand, and allows the operator to observe the position of the puncture target point through the puncture hole under direct vision on the other hand.

[0028] In order to facilitate the adjustment mechanism to be locked after being translated radially into position in the counterbore, in this embodiment, a locking external thread is provided on the outer peripheral surface of the connecting column 5, and a locking nut 9 is sleeved on the connecting column between the connecting seat and the soft bottom plate and is threadedly connected to the connecting column to lock the adjustment mechanism after being moved into position.

[0029] In this way, after the adjustment mechanism is translated to align the puncture hole with the puncture target point, the locking nut is screwed to lock the adjustment mechanism to prevent displacement of the adjustment mechanism during the puncture process, thereby improving the puncture accuracy.

[0030] In order to facilitate the control of the translation distance of the adjustment mechanism, in this embodiment, a horizontal scale line 10 and a vertical scale line 11 are respectively provided on the surface of the soft bottom plate 1, and the intersection of the two scale lines is located on the center line of the countersunk hole. In this way, it is convenient for medical staff to control the translation distance of the adjustment mechanism forward, backward, left and right by observing the scale lines.

[0031] In order to facilitate the control of the puncture speed, in this embodiment, an internal puncture thread is provided on the inner circumference of the puncture seat 2, and an external puncture thread is provided on the outer circumference of the puncture needle clamping seat 8. The puncture needle clamping seat is threadedly connected to the puncture seat, so that the puncture needle clamping seat is rotated to make it move axially in the puncture seat, thereby realizing the puncture speed control. A twisting ring 12 is formed on the end of the puncture needle clamping seat 8 away from the connecting seat, and convex teeth are evenly arranged on the outer circumference of the twisting ring to play an anti-slip role, so as to facilitate the rotation of the puncture needle clamping seat to control the puncture speed.

[0032] See also Figure 3 Each of the above-mentioned clamping mechanisms includes a positioning column 13, one end of which is fixedly connected to the inner circumference of the puncture needle clamping seat, the other end of the positioning column is provided with an axially penetrating slide groove, and a sliding column 14 is slidably provided, and an arc-shaped clamping block 15 is provided at the end of the sliding column away from the positioning column, and a reset spring 16 is sleeved on the positioning column, one end of the reset spring abuts against the inner circumference of the puncture needle clamping seat, and the other end abuts against the arc-shaped clamping block; all groups of arc-shaped clamping blocks are surrounded to form a circular ring, the inner diameter of the circular ring is smaller than the diameter of the puncture needle, and is used to clamp the puncture needle.

[0033] In this way, during puncture, the puncture needle is inserted into the circular ring formed by all groups of arc-shaped clamping blocks, the inner diameter of the circular ring becomes larger, and the reset spring is compressed. Through the pressure of the reset spring, all groups of arc-shaped clamping blocks are fitted with the outer peripheral surface of the puncture needle, thereby ensuring the stability of the puncture needle when it is clamped; at the same time, the inner diameter of the circular ring changes with the diameter of the puncture needle, and it is also suitable for clamping puncture needles of various specifications.

[0034] In order to facilitate the insertion of the puncture needle into the ring formed by all the arc-shaped clamping blocks and reduce the wear on the puncture needle, in this embodiment, one or both ends of the arc-shaped clamping block 15 facing the axial direction of the puncture needle clamping seat 8 are rounded or chamfered.

[0035] In order to facilitate the screwing of the puncture seat and the connection seat, the thread is locked to prevent slipping during the screwing process. In this embodiment, a plurality of convex teeth are evenly spaced in the circumferential direction on the outer circumference of the puncture seat, or anti-slip grooves are provided, or mutually parallel planes are provided on the outer circumference of the puncture seat. The mutually parallel planes can facilitate the screwing of the puncture seat and also reduce the weight of the puncture seat.

[0036] In order to facilitate the fixing of the soft bottom plate, in this embodiment, an adhesive is attached to the lower surface of the soft bottom plate 1, and the adhesive can be a bandage, and a Velcro fur surface is set on the surface of the bandage near one end thereof, and a Velcro thorn surface is set on the other end; when in use, the puncture hole is aligned with the puncture point, and the two ends of the bandage are respectively wrapped around the patient's waist, and the Velcro fur surface is bonded to the Velcro thorn surface, and the soft bottom plate can be fixed. Alternatively, an adhesive layer 17 and a release paper layer 18 are sequentially arranged on the lower surface of the soft bottom plate 1 as adhesives, and the bottom layer is the release paper layer, so as to avoid the adhesive layer from being attached to other objects when not in use; when in use, the release paper layer is torn off to expose the surface of the adhesive layer, and the puncture point is observed through the puncture hole, and it is aligned with the puncture point, and finally the adhesive layer is bonded to the patient's skin, so that the operation is more convenient.

[0037] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the utility model and are not intended to limit the present invention. Although the present invention has been described by referring to the preferred embodiments of the present invention, it should be understood by those skilled in the art that various changes can be made to the present invention in form and detail without departing from the spirit and scope of the present invention as defined in the appended claims. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and scope of the present invention shall be included in the protection scope of the present invention.

Claims

1. A positioning guide for minimally invasive lumbar nerve root puncture, characterized in that: The invention comprises a soft bottom plate (1) and a puncture seat (2), a countersunk hole (3) is provided on the surface of the soft bottom plate, and an adjustment mechanism which can move radially along the countersunk hole is provided; the adjustment mechanism comprises a connecting seat (4), the connecting seat is a columnar groove structure, a connecting column (5) is axially protruded from the bottom of the connecting seat, a limit ring (6) is radially protruded from the outer peripheral surface of the connecting column away from one end of the connecting seat, and an axially through puncture hole (7) is provided at the bottom of the connecting seat and the end surface of the connecting column for the puncture needle to pass through; an internal thread is provided on the groove wall of the connecting seat, the puncture seat is a hollow columnar structure, an external thread is provided on the outer peripheral surface of the puncture seat near one end thereof, and is threadedly connected to the connecting seat; a puncture needle clamping seat (8) is movably provided in the puncture seat, the puncture needle clamping seat is a hollow columnar structure, and a plurality of clamping mechanisms are evenly spaced circumferentially on the inner peripheral surface of the puncture needle clamping seat for clamping the puncture needle.

2. A positioning guide for minimally invasive lumbar nerve root puncture according to claim 1, characterized in that: A locking external thread is provided on the outer peripheral surface of the connecting column (5), and a locking nut (9) is sleeved on the connecting column between the connecting seat and the soft bottom plate and is threadedly connected to the connecting column to lock the adjustment mechanism after moving into position.

3. A positioning guide for minimally invasive lumbar nerve root puncture according to claim 2, characterized in that: A transverse scale line (10) and a longitudinal scale line (11) are respectively arranged on the surface of the soft bottom plate (1), and the intersection of the two scale lines is located on the center line of the countersunk hole.

4. A positioning guide for minimally invasive lumbar nerve root puncture according to claim 1, characterized in that: An internal puncture thread is provided on the inner circumference of the puncture seat, and an external puncture thread is provided on the outer circumference of the puncture needle clamping seat, and the puncture needle clamping seat is threadedly connected to the puncture seat; a twisting ring (12) is formed on the end of the puncture needle clamping seat away from the connecting seat in a radially protruding manner, and convex teeth are evenly arranged on the outer circumferential surface of the twisting ring.

5. A positioning guide for minimally invasive lumbar nerve root puncture according to any one of claims 1 to 4, characterized in that: Each group of clamping mechanisms comprises a positioning column (13), one end of which is fixedly connected to the inner circumference of the puncture needle clamping seat (8), the other end of which is provided with an axially penetrating slide groove and a sliding column (14) slidably provided, an arc-shaped clamping block (15) is provided at the end of the sliding column away from the positioning column, and a return spring (16) is sleeved on the positioning column, one end of the return spring abuts against the inner circumference of the puncture needle clamping seat, and the other end abuts against the arc-shaped clamping block; all groups of arc-shaped clamping blocks are combined to form a ring for clamping the puncture needle.

6. A positioning guide for minimally invasive lumbar nerve root puncture according to claim 5, characterized in that: Both ends of the arc-shaped clamping block facing the puncture needle clamping seat in the axial direction are rounded respectively.

7. A positioning guide for minimally invasive lumbar nerve root puncture according to claim 1, characterized in that: The outer peripheral surface of the puncture seat (2) is provided with planes parallel to each other, so as to facilitate the twisting of the puncture seat.

8. A positioning guide for minimally invasive lumbar nerve root puncture according to claim 1, characterized in that: An adhesive component is arranged on the lower surface of the soft bottom plate for fixing the soft bottom plate.

9. A positioning guide for minimally invasive lumbar nerve root puncture according to claim 8, characterized in that: The adhesive component comprises an adhesive layer (17) and a release paper layer (18) which are sequentially arranged on the lower surface of the soft bottom plate.

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