A coaxial biopsy needle for guiding microwave ablation electrode puncture

Abstract

The utility model belongs to the technical field of biopsy needles, and specifically relates to a coaxial biopsy needle for guiding microwave ablation electrode puncture, comprising a handle, the upper end of the handle contacts a ligand seat, the left end of the ligand seat is provided with a microwave ablation electrode body, the interior of the microwave ablation electrode body is slidably connected with a biopsy needle body, the vertical portion of the handle is movably connected with a screw, the screw is threadedly connected to the ligand seat, a slot is provided on the surface of the screw, the interior of the handle is slidably connected with a clamping rod, and the clamping rod is slidably connected to the clamping groove. The utility model pushes the push rod to move to the left to push the biopsy needle body to move, and is used for extracting samples from the patient's tissue. Under the action of the clamping hole, clamping ball, spring and other structures, the extraction depth of the biopsy needle can be accurately controlled.

Description

Technical Field

[0001] The utility model relates to the technical field of biopsy needles, in particular to a coaxial biopsy needle for guiding microwave ablation electrode puncture. Background Art

[0002] The coaxial biopsy needle for guiding microwave ablation electrode puncture is a medical device used for biopsy during microwave ablation treatment. The device combines a microwave ablation electrode and a biopsy needle, and can complete microwave ablation and biopsy operations in the same puncture process.

[0003] A microwave ablation needle with biopsy function is disclosed in the utility model patent with patent authorization announcement number CN213372446U, which belongs to the field of microwave ablation technology. The needle shaft of the microwave ablation needle contains a cannula that is set obliquely for the biopsy needle to pass through. In this way, only one puncture is needed to complete the two operations of ablation and biopsy, which will greatly reduce the occurrence of complications and improve efficiency.

[0004] However, the existing coaxial biopsy needle for guiding microwave ablation electrode puncture also has certain shortcomings. First, the ligand seat and the handle member used in the existing coaxial biopsy needle for guiding microwave ablation electrode puncture are mostly connected by simple elastic snap-fit ​​connection, which will cause the connection stability between the ligand seat and the handle member to be weak;

[0005] Secondly, the existing coaxial biopsy needle for guiding microwave ablation electrode puncture needs manual operation to perform puncture when extracting samples from patient tissues, which easily leads to the problem of poor accuracy of puncture depth. Utility Model Content

[0006] The utility model aims to provide a coaxial biopsy needle for guiding microwave ablation electrode puncture, which solves the problem that the ligand seat and the handle piece used in the existing coaxial biopsy needle for guiding microwave ablation electrode puncture are mostly simply elastically snap-fitted, which makes the connection stability between the ligand seat and the handle piece weak; and solves the problem that the existing coaxial biopsy needle for guiding microwave ablation electrode puncture requires manual puncture processing when extracting samples from patient tissues, which easily causes poor accuracy of puncture depth.

[0007] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a coaxial biopsy needle for guiding microwave ablation electrode puncture, comprising a handle piece, the upper end of the handle piece contacts a ligand seat, the left end of the ligand seat is provided with a microwave ablation electrode body, the interior of the microwave ablation electrode body is slidably connected with a biopsy needle body, the vertical part of the handle piece is movably connected with a screw, the screw is threadedly connected to the ligand seat, a slot is provided on the surface of the screw, the interior of the handle piece is slidably connected with a clamping rod, and the clamping rod is slidably connected to the clamping slot.

[0008] Preferably, a plurality of the clamping slots are provided, and the plurality of the clamping slots are arranged in a circular array on the screw. The provision of the clamping slots facilitates clamping with the clamping rod.

[0009] Preferably, a spring 1 is welded to the end of the clamping rod, and the other end of the spring 1 is fixedly connected to the vertical portion of the handle piece. By providing the spring 1, the clamping rod can be tightened.

[0010] Preferably, the ligand seat is internally slidably connected with a push rod, the push rod is slidably connected to the microwave ablation electrode body, the push rod is fixedly connected to the biopsy needle body, the ligand seat is internally slidably connected with a guide plate, the end face of the guide plate close to the push rod is fixedly connected to a limiting plate, the limiting plate is slidably connected to the ligand seat, a clamping hole is provided on the surface of the limiting plate, a moving ring is fixedly sleeved on the outer side of the push rod, the moving ring is slidably connected to the limiting plate, a clamping ball is fixedly connected to the inner side wall of the moving ring, the clamping ball is slidably connected to the clamping hole, and the biopsy needle body can be pushed to move to the left side to extract samples from patient tissues. Under the action of the clamping hole, the clamping ball and other structures, the position of the push rod can be limited, and the puncture depth of the biopsy needle body can be accurately controlled.

[0011] Preferably, there are a plurality of the clamping holes, which are evenly distributed on the limiting plate. The clamping holes are arranged to facilitate clamping with the clamping ball.

[0012] Preferably, a second spring is welded to the end surface of the limit plate away from the push rod, and the other end of the second spring is fixedly connected to the ligand seat. By setting the second spring, the limit plate can be connected for use.

[0013] Preferably, the right end of the push rod is fixedly connected with an end plate, and the end plate is made of silicone material. The setting of the end plate facilitates the push rod to move, and the silicone material has good skin-friendliness.

[0014] Compared with the prior art, the beneficial effects of the utility model are as follows:

[0015] 1. The utility model can fix and assemble the handle piece and the ligand seat by setting the screws. Under the action of the slots, the levers and other structures, the screws can be limited to ensure the stability of the connection between the handle piece and the ligand seat.

[0016] 2. The utility model pushes the push rod to move to the left to push the biopsy needle body to move, so as to extract samples from the patient's tissue. Under the action of the clamping hole, the clamping ball, the spring and other structures, the extraction depth of the biopsy needle can be accurately controlled. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a three-dimensional diagram of the overall structure of the utility model;

[0018] Figure 2 For the utility model Figure 1 A side view of a stereogram;

[0019] Figure 3 For the utility model Figure 1 A top sectional view of

[0020] Figure 4 For the utility model Figure 3 A magnified image of point A;

[0021] Figure 5 For the utility model Figure 3 Zoomed view of the moving ring.

[0022] In the figure: 1. handle piece; 2. ligand seat; 3. microwave ablation electrode body; 4. biopsy needle body; 5. screw; 6. slot; 7. clamping rod; 8. spring one; 9. push rod; 10. guide plate; 11. limit plate; 12. clamping hole; 13. moving ring; 14. clamping ball; 15. spring two. DETAILED DESCRIPTION

[0023] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0024] See also Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 5 A coaxial biopsy needle for guiding microwave ablation electrode puncture comprises a handle piece 1, the upper end of the handle piece 1 contacts with a ligand seat 2, the left end of the ligand seat 2 is provided with a microwave ablation electrode body 3, the interior of the microwave ablation electrode body 3 is slidably connected with a biopsy needle body 4, the vertical part of the handle piece 1 is movably connected with a screw 5, the screw 5 is threadedly connected to the ligand seat 2, a slot 6 is provided on the surface of the screw 5, a clamping rod 7 is slidably connected to the interior of the handle piece 1, and the clamping rod 7 is slidably connected to the clamping slot 6.

[0025] See also Figure 1 , Figure 2 , Figure 3 , Figure 4There are multiple card slots 6, which are arranged in a circular array on the screw 5. The card slots 6 are arranged to facilitate the use of the card rod 7 for card connection. A spring 8 is welded to the end of the card rod 7, and the other end of the spring 8 is fixedly connected to the vertical part of the handle 1. The card rod 7 can be tightened by the spring 8.

[0026] See also Figure 1 , Figure 2 , Figure 3 , Figure 5 The ligand seat 2 is internally slidably connected with a push rod 9, which is slidably connected to the microwave ablation electrode body 3, and is fixedly connected to the biopsy needle body 4. The ligand seat 2 is internally slidably connected with a guide plate 10, and the end face of the guide plate 10 close to the push rod 9 is fixedly connected with a limiting plate 11, and the limiting plate 11 is slidably connected to the ligand seat 2. A clamping hole 12 is provided on the surface of the limiting plate 11, and a moving ring 13 is fixedly sleeved on the outer side of the push rod 9, and the moving ring 13 is slidably connected to the limiting plate 11. A clamping ball 14 is fixedly connected to the inner side wall of the moving ring 13, and the clamping ball 14 is slidably connected to the clamping hole 12. By pushing the push rod 9 to move to the left, the biopsy needle body 4 can be pushed to move, and the patient's tissue can be used for sample extraction. Under the action of the clamping hole 12, the clamping ball 14 and other structures, the position of the push rod 9 can be limited, and then the puncture depth of the biopsy needle body 4 can be accurately controlled.

[0027] See also Figure 1 , Figure 2 , Figure 3 , Figure 5 There are multiple clamping holes 12, and the multiple clamping holes 12 are evenly distributed on the limit plate 11. Through the setting of the clamping holes 12, it is convenient to cooperate with the clamping ball 14 for clamping. The end surface of the limit plate 11 away from the push rod 9 is welded with a spring 2 15, and the other end of the spring 2 15 is fixedly connected to the ligand seat 2. Through the setting of the spring 2 15, the limit plate 11 can be connected and used. The right end of the push rod 9 is fixedly connected with an end plate, and the end plate is made of silicone. Through the setting of the end plate, it is convenient to push the push rod 9 to move, and the silicone material has good skin-friendliness.

[0028] The specific implementation process of the utility model is as follows: when the coaxial biopsy needle guiding the microwave ablation electrode puncture needs to be used, the clamping rod 7 is pulled to move toward the vertical part away from the handle 1, the spring 1 8 is deformed, and then the screw 5 is pushed through the vertical part of the handle 1, so that the screw 5 contacts the ligand seat 2, the screw 5 is rotated, so that the screw 5 makes a threaded movement, the screw 5 is fixed, and the clamping rod 7 is loosened to make the spring 1 8 recover its deformation, so as to push the clamping rod 7 to insert into the clamping slot 6, limit the screw 5, and make the connection between the handle 1 and the ligand seat 2 stable;

[0029] When it is necessary to extract samples from the patient's tissue, the push rod 9 can be pushed to the left to push the biopsy needle body 4 to move, so that the biopsy needle body 4 can puncture the patient's tissue. In this process, when the push rod 9 moves, it can drive the movable ring 13 to move, and drive the card ball 14 to move. Under the squeezing of the card ball 14, the limit plate 11 moves, so that the limit plate 11 pushes the guide plate 10 to move, and the spring 2 15 is deformed, and finally the card ball 14 contacts with the surface of the limit plate 11. Under the action of force, the card ball 14 moves along the surface of the limit plate 11. When the card ball 14 slides into the card hole 12, the spring 2 15 restores its deformation to push the limit plate 11 to contact the movable ring 13, and make the card ball 14 squeeze into the card hole 12, limit the push rod 9, and then accurately process the position of the biopsy needle body 4.

[0030] Although the embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A coaxial biopsy needle for guiding microwave ablation electrode puncture, comprising a handle (1), characterized in that: The upper end of the handle member (1) contacts the ligand seat (2), the left end of the ligand seat (2) is provided with a microwave ablation electrode body (3), the interior of the microwave ablation electrode body (3) is slidably connected to a biopsy needle body (4), the vertical portion of the handle member (1) is movably connected to a screw (5), the screw (5) is connected to the ligand seat (2) by a thread, a slot (6) is provided on the surface of the screw (5), the interior of the handle member (1) is slidably connected to a clamping rod (7), and the clamping rod (7) is slidably connected to the clamping groove (6).

2. A coaxial biopsy needle for guiding microwave ablation electrode puncture according to claim 1, characterized in that: A plurality of the clamping slots (6) are provided, and the plurality of the clamping slots (6) are arranged in a ring array on the screw (5).

3. The coaxial biopsy needle for guiding microwave ablation electrode puncture according to claim 1, characterized in that: A spring 1 (8) is welded to the end of the clamping rod (7), and the other end of the spring 1 (8) is fixedly connected to the vertical portion of the handle member (1).

4. The coaxial biopsy needle for guiding microwave ablation electrode puncture according to claim 1, characterized in that: The ligand seat (2) is internally slidably connected to a push rod (9), the push rod (9) is slidably connected to a microwave ablation electrode body (3), the push rod (9) is fixedly connected to a biopsy needle body (4), the ligand seat (2) is internally slidably connected to a guide plate (10), the end surface of the guide plate (10) close to the push rod (9) is fixedly connected to a limit plate (11), the limit plate (11) is slidably connected to the ligand seat (2), a clamping hole (12) is provided on the surface of the limit plate (11), a movable ring (13) is fixedly sleeved on the outer side of the push rod (9), the movable ring (13) is slidably connected to the limit plate (11), a clamping ball (14) is fixedly connected to the inner side wall of the movable ring (13), and the clamping ball (14) is slidably connected to the clamping hole (12).

5. The coaxial biopsy needle for guiding microwave ablation electrode puncture according to claim 4, characterized in that: A plurality of the clamping holes (12) are provided, and the plurality of the clamping holes (12) are evenly distributed on the limiting plate (11).

6. The coaxial biopsy needle for guiding microwave ablation electrode puncture according to claim 4, characterized in that: A second spring (15) is welded to the end surface of the limiting plate (11) away from the push rod (9), and the other end of the second spring (15) is fixedly connected to the ligand seat (2).

7. The coaxial biopsy needle for guiding microwave ablation electrode puncture according to claim 4, characterized in that: The right end of the push rod (9) is fixedly connected to an end plate, and the end plate is made of silicone material.

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