A special percutaneous puncture needle for screw-on radioactive seed implantation

Abstract

The present invention relates to the technical field of puncture needles, and in particular to a special percutaneous puncture needle for screw-on radioactive seed implantation, comprising a guide needle, a sleeve fixedly connected to the rear end of the guide needle, a guide tube slidingly sleeved on the outer surface of the guide needle, a sliding ball threadedly sleeved on the outer surface of the guide tube, the rear end of the guide tube is clamped with the front end of the sleeve through a docking mechanism, the outer surface of the sliding ball is sleeved with a connecting frame, the inner top position of the connecting frame is connected to a limiting plate through an elastic mechanism, the lower surface of the limiting plate and the inner bottom surface of the connecting frame are respectively provided with curved grooves, the sliding ball is slidably clamped between the upper and lower curved grooves, the two side surfaces of the connecting frame are respectively rotatably connected with connecting rods, a clamping mechanism is provided between the two ends of the limiting plate and the upper surface of the connecting rod, the present invention has the function of quickly completing the positioning of the guide needle, and can cooperate with the support of the thigh root to further improve the stability of the guide needle when inserted, so that the insertion process of the injection needle is convenient and the accuracy is improved.

Description

Technical Field

[0001] The invention relates to the technical field of puncture needles, in particular to a screw-on percutaneous puncture needle dedicated for radioactive seed implantation. Background Art

[0002] The screw-on percutaneous puncture needle for radioactive seed implantation is a medical device designed to implant radioactive seeds into the targeted location of the tumor. This puncture needle is designed to be used with the radioactive seed protection implanter, guided by imaging equipment, to achieve accurate and safe tumor interventional radiotherapy. During the radioactive seed implantation process, a transperineal prostate puncture is used, which means that the puncture needle penetrates the prostate tissue through the skin area between the anus and the scrotum.

[0003] During the puncture process, there is a problem that the guide needle is not stable enough during puncture, and there is also an instability problem when the subsequent injection needle is inserted, which affects the puncture accuracy. Therefore, a screw-on percutaneous puncture needle dedicated to radioactive seed implantation is proposed. Summary of the invention

[0004] The purpose of the present invention is to solve the shortcomings of the background technology and to propose a screw-on percutaneous puncture needle for radioactive seed implantation.

[0005] To achieve the above objectives, the technical solution adopted by the present invention is: a screw-on percutaneous puncture needle specially used for radioactive seed implantation, comprising a guide needle, a sleeve fixedly connected to the rear end of the guide needle, a guide tube slidingly sleeved on the outer surface of the guide needle, a sliding ball threadedly sleeved on the outer surface of the guide tube, the rear end of the guide tube is clamped with the front end of the sleeve through a docking mechanism, the outer surface of the sliding ball is sleeved with a connecting frame, the inner top position of the connecting frame is connected to a limiting plate through an elastic mechanism, the lower surface of the limiting plate and the inner bottom surface of the connecting frame are respectively provided with curved grooves, the sliding ball slides and is clamped between the upper and lower curved grooves, the two side surfaces of the connecting frame are respectively rotatably connected with connecting rods, a clamping mechanism is arranged between the two ends of the limiting plate and the upper surface of the connecting rod, one end of the connecting rod is fixedly connected with a support plate, the outer surface of the support plate is fixedly connected with a soft pad, and a needle body mechanism is slidably inserted into the inner side of the guide needle.

[0006] Preferably, the rear end of the guide tube is fixedly connected to an extension plate, the rear surface of the extension plate is fixedly connected to no less than two L-shaped blocks, and the front end of the sleeve is inserted between the plurality of L-shaped blocks.

[0007] Preferably, sliding openings are respectively provided on both side surfaces of the connection frame and near the upper end, and sliders are respectively fixedly connected to both ends of the limiting plate. The front and rear surfaces of the sliders are respectively provided with card grooves, and the card grooves are slidably clamped in the inner edges of the sliding openings.

[0008] Preferably, the elastic mechanism includes a movable column fixedly connected to the upper surface of the limit plate, the upper end of the movable column slides through the inner top surface of the connecting frame, the upper end of the movable column is fixedly connected to the limit head, and the outer side of the movable column is provided with a compression spring, and the upper end of the compression spring contacts the inner top surface of the connecting frame.

[0009] Preferably, a clamping bolt is threadedly penetrated through the upper surface of the connection frame, and the lower end of the clamping bolt contacts the upper surface of the limiting plate.

[0010] Preferably, connecting seats are fixedly connected at the lower ends of both side surfaces of the connecting frame, and the upper surfaces of the connecting seats are rotatably connected to the connecting rod through a rotating shaft. The clamping mechanism includes a limit plate fixedly connected to the upper surface of the connecting rod, and the limit plate is coaxially sleeved on the outer surface of the rotating shaft. The lower surface of the slider is fixedly connected to a connecting column, and the lower end of the connecting column is fixedly connected to a pressure plate, and the lower surface of the pressure plate is meshed with the upper surface of the limit plate.

[0011] Preferably, a plurality of tooth grooves arranged in a circular array are provided at the edge of the lower surface of the pressure plate, and a plurality of limiting teeth arranged in a circular array are fixedly provided at the edge of the upper surface of the limiting plate, and the limiting teeth are inserted into the inner sides of the tooth grooves.

[0012] Preferably, the needle body mechanism comprises an injection needle sliding through the inner side of the guide needle, the rear end of the injection needle is fixedly connected to an injection sleeve, the rear end of the outer surface of the injection needle is fixedly provided with a connecting handle, and the outer surface of the connecting handle is provided with a gripping opening.

[0013] Compared with the prior art, the present invention has the following beneficial effects:

[0014] The present invention can quickly complete the positioning of the guide needle, and can also cooperate with the support of the thigh root to further improve the stability of the guide needle during insertion;

[0015] The present invention facilitates the piercing process of the injection needle and improves the accuracy. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a structural schematic diagram of a screw-on percutaneous puncture needle specially used for radioactive seed implantation according to the present invention;

[0017] Figure 2 It is a schematic diagram of a connection frame of a screw-on percutaneous puncture needle specially used for radioactive seed implantation according to the present invention;

[0018] Figure 3 The invention discloses a special percutaneous puncture needle for screw-on radioactive seed implantation. Figure 2 Enlarged view of point A in the middle;

[0019] Figure 4It is a cross-sectional view of the connection frame of a screw-on percutaneous puncture needle specially used for radioactive seed implantation according to the present invention;

[0020] Figure 5 It is a schematic diagram of a limit plate of a screw-on percutaneous puncture needle specially used for radioactive seed implantation according to the present invention;

[0021] Figure 6 It is a schematic diagram of the pressure plate of a screw-on percutaneous puncture needle specially used for radioactive seed implantation according to the present invention;

[0022] Figure 7 It is a schematic diagram of the guide needle of a screw-on percutaneous puncture needle specially used for radioactive seed implantation according to the present invention;

[0023] Figure 8 The present invention is a schematic diagram of the injection needle of a screw-on percutaneous puncture needle specially used for radioactive seed implantation.

[0024] 1. Guide needle; 2. Sleeve head; 3. Connecting frame; 4. Limiting plate; 5. Curved groove; 6. Sliding ball; 7. Movable column; 8. Limiting head; 9. Compression spring; 10. Guide tube; 11. Extension plate; 12. L-shaped block; 13. Holding bolt; 14. Connecting seat; 15. Connecting rod; 16. Rotating shaft; 17. Limiting plate; 18. Limiting teeth; 19. Pressure plate; 20. Tooth groove; 21. Connecting column; 22. Sliding block; 23. Slot; 24. Sliding mouth; 25. Support plate; 26. Soft pad; 27. Injection needle; 28. Injection sleeve; 29. ​​Connecting handle; 30. Holding mouth. DETAILED DESCRIPTION

[0025] The following description is used to disclose the present invention so that those skilled in the art can implement the present invention. The preferred embodiments described below are only examples, and those skilled in the art may think of other obvious variations.

[0026] like Figure 1-Figure 8 The shown percutaneous puncture needle for special radioactive seed implantation with a screw-on connection comprises a guide needle 1, the rear end of the guide needle 1 is fixedly connected with a sleeve 2, the outer surface of the guide needle 1 is slidably sleeved with a guide tube 10, the outer surface of the guide tube 10 is threadedly sleeved with a sliding ball 6, the rear end of the guide tube 10 is clamped with the front end of the sleeve 2 through a docking mechanism, the outer surface of the sliding ball 6 is sleeved with a connecting frame 3, the inner top position of the connecting frame 3 is connected to a limiting plate 4 through an elastic mechanism, the lower surface of the limiting plate 4 and the inner bottom surface of the connecting frame 3 are respectively provided with curved grooves 5, the sliding ball 6 is slidably inserted between the upper and lower curved grooves 5, the two side surfaces of the connecting frame 3 are respectively rotatably connected with connecting rods 15, a clamping mechanism is arranged between the two ends of the limiting plate 4 and the upper surface of the connecting rod 15, one end of the connecting rod 15 is fixedly connected with a support plate 25, the outer surface of the support plate 25 is fixedly connected with a soft pad 26, and a needle body mechanism is slidably inserted into the inner side of the guide needle 1.

[0027] like Figure 4 , Figure 7 As shown, the rear end of the guide tube 10 is fixedly connected with an extension plate 11, and the rear surface of the extension plate 11 is fixedly connected with at least two L-shaped blocks 12, and the front end of the sleeve 2 is inserted between the plurality of L-shaped blocks 12. The L-shaped blocks 12 can be made of silicone material and can be snap-fitted with the plastic sleeve 2. At the same time, after pinching the sliding ball 6, the guide tube 10 can be taken out of the sliding ball 6 by rotating the L-shaped blocks 12, so as to facilitate the replacement of the guide tube 10.

[0028] like Figure 2 , Figure 6 As shown, sliding openings 24 are respectively provided on the two side surfaces of the connection frame 3 and near the upper end, and the two ends of the limiting plate 4 are respectively fixedly connected with the sliders 22, and the front and rear surfaces of the sliders 22 are respectively provided with card slots 23, and the card slots 23 are slidably clamped in the inner edge of the sliding openings 24. This ensures that the slider 22 can slide up and down inside the sliding openings 24 without the problem of separation.

[0029] like Figure 4 As shown, the elastic mechanism includes a movable column 7 fixedly connected to the upper surface of the limit plate 4, the upper end of the movable column 7 slides through the inner top surface of the connection frame 3, the upper end of the movable column 7 is fixedly connected to the limit head 8, and the outer side of the movable column 7 is sleeved with a compression spring 9, and the upper end of the compression spring 9 contacts the inner top surface of the connection frame 3. The elastic force of the compression spring 9 allows the sliding ball 6 to slide under a certain damping effect, preventing the sliding of the sliding ball 6 from being too smooth and causing positioning difficulties.

[0030] like Figure 2 As shown, a pressing bolt 13 is threadedly passed through the upper surface of the connection frame 3, and the lower end of the pressing bolt 13 contacts the upper surface of the limiting plate 4. The pressing bolt 13 plays a limiting role, ensuring that the limiting plate 4 can be pressed on the surface of the sliding ball 6 more stably.

[0031] like Figure 2 , Figure 3 As shown, the lower ends of the two side surfaces of the connection frame 3 are respectively fixedly connected with the connection seat 14, the upper surface of the connection seat 14 is rotatably connected with the connection rod 15 through the rotating shaft 16, the clamping mechanism includes a limit plate 17 fixedly connected to the upper surface of the connection rod 15, the limit plate 17 is coaxially sleeved on the outer surface of the rotating shaft 16, the lower surface of the slider 22 is fixedly connected with the connection column 21, the lower end of the connection column 21 is fixedly connected with the pressure plate 19, and the lower surface of the pressure plate 19 is meshed with the upper surface of the limit plate 17. When the connection rod 15 rotates, the limit plate 17 will rotate synchronously.

[0032] like Figure 5 , Figure 6As shown, a plurality of tooth grooves 20 arranged in a circular array are provided at the edge of the lower surface of the pressure plate 19, and a plurality of limiting teeth 18 arranged in a circular array are fixedly provided at the edge of the upper surface of the limiting plate 17, and the limiting teeth 18 are inserted into the inner side of the tooth grooves 20. Through this design, the pressure plate 19 and the limiting plate 17 are meshed, ensuring that the stability of the structure can be maintained after the two are in contact.

[0033] like Figure 1 , Figure 7 , Figure 8 As shown, the needle body mechanism includes an injection needle 27 that slides through the inner side of the guide needle 1, and the rear end of the injection needle 27 is fixedly connected to an injection sleeve 28. A connecting handle 29 is fixedly sleeved at the rear end of the outer surface of the injection needle 27, and a gripping opening 30 is opened on the outer surface of the connecting handle 29. The gripping opening 30 is convenient for the user to hold, and the injection sleeve 28 is used to connect the syringe, which is a prior art and will not be described in detail.

[0034] The patient takes the lithotomy position, raises the buttocks, bends the legs, and spreads them to the sides, and directly places the two support plates 25 against the leg roots for support. After loosening the clamping bolt 13, the sliding ball 6 can be slid between the upper and lower curved grooves 5, and the sliding ball 6 can also be rotated. Correspondingly, the guide needle 1 can be moved laterally and the angle can be changed to achieve the effect of flexibly adjusting the puncture position. After adjusting the supporting position of the support plate 25, the puncture position and angle of the guide needle 1, the clamping bolt 13 is tightened. At this time, the limiting plate 4 presses down the sliding ball 6 to ensure the stability of the sliding ball 6, that is, to limit the guide needle 1. At the same time, the pressure plate 19 will also stably press the limiting plate 17, thereby ensuring the stability of the connecting rod 15, and the positioning function of the guide needle 1 can be quickly completed. At the same time, it can cooperate with the support of the thigh root to further improve the stability of the guide needle 1 during insertion.

[0035] During the insertion of the guide needle 1, until the front end of the sleeve 2 is stuck between several L-shaped blocks 12, the stability of the guide needle 1 can be guaranteed, and then the injection needle 27 is inserted from the rear end of the sleeve 2 to achieve the purpose of rapid and accurate puncture. After that, the radioactive seeds are implanted through the injection needle 27. The whole process is convenient and highly accurate.

[0036] The above shows and describes the basic principles, main features and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The above embodiments and descriptions only describe the principles of the present invention. The present invention may be subject to various changes and improvements without departing from the spirit and scope of the present invention. These changes and improvements fall within the scope of the present invention. The scope of protection claimed by the present invention is defined by the attached claims and their equivalents.

Claims

1. A screw-on percutaneous puncture needle for radioactive seed implantation, comprising a guide needle (1), characterized in that: The rear end of the guide needle (1) is fixedly connected to a sleeve (2); a guide tube (10) is slidably sleeved on the outer surface of the guide needle (1); a sliding ball (6) is threadedly sleeved on the outer surface of the guide tube (10); the rear end of the guide tube (10) is clamped with the front end of the sleeve (2) through a docking mechanism; the outer surface of the sliding ball (6) is sleeved with a connecting frame (3); the inner top position of the connecting frame (3) is connected to a limiting plate (4) through an elastic mechanism; the lower surface of the limiting plate (4) and the inner bottom surface of the connecting frame (3) are respectively provided with curved grooves (5); the sliding ball (6) is slidably inserted between the upper and lower curved grooves (5); the two side surfaces of the connecting frame (3) are respectively rotatably connected to connecting rods (15); a clamping mechanism is provided between the two ends of the limiting plate (4) and the upper surface of the connecting rod (15); one end of the connecting rod (15) is fixedly connected to a support plate (25); the outer surface of the support plate (25) is fixedly connected to a soft pad (26); and a needle body mechanism is slidably inserted into the inner side of the guide needle (1); Slide openings (24) are respectively provided on the two side surfaces of the connection frame (3) and near the upper end; the two ends of the limit plate (4) are respectively fixedly connected to sliders (22); the front and rear surfaces of the sliders (22) are respectively provided with clamping grooves (23); the clamping grooves (23) are slidably clamped in the inner edges of the slide openings (24); The lower ends of the two side surfaces of the connection frame (3) are respectively fixedly connected to connection seats (14); the upper surface of the connection seat (14) is rotatably connected to the connection rod (15) via a rotating shaft (16); the clamping mechanism comprises a limit plate (17) fixedly connected to the upper surface of the connection rod (15); the limit plate (17) is coaxially sleeved on the outer surface of the rotating shaft (16); the lower surface of the slider (22) is fixedly connected to a connection column (21); the lower end of the connection column (21) is fixedly connected to a pressure plate (19); the lower surface of the pressure plate (19) is meshed with the upper surface of the limit plate (17).

2. A screw-on percutaneous puncture needle for radioactive seed implantation according to claim 1, characterized in that: The rear end of the guide tube (10) is fixedly connected to an extension disk (11), the rear surface of the extension disk (11) is fixedly connected to no less than two L-shaped blocks (12), and the front end of the sleeve (2) is inserted between the plurality of L-shaped blocks (12).

3. The screw-on percutaneous puncture needle for radioactive seed implantation according to claim 1, characterized in that: The elastic mechanism comprises a movable column (7) fixedly connected to the upper surface of the limit plate (4), the upper end of the movable column (7) slidingly passes through the inner top surface of the connection frame (3), the upper end of the movable column (7) is fixedly connected to the limit head (8), the outer side of the movable column (7) is sleeved with a compression spring (9), and the upper end of the compression spring (9) contacts the inner top surface of the connection frame (3).

4. The screw-on percutaneous puncture needle for radioactive seed implantation according to claim 1, characterized in that: A clamping bolt (13) is threadedly penetrated through the upper surface of the connection frame (3), and the lower end of the clamping bolt (13) contacts the upper surface of the limiting plate (4).

5. The screw-on percutaneous puncture needle for radioactive seed implantation according to claim 1, characterized in that: A plurality of tooth grooves (20) arranged in a circular array are provided at the edge of the lower surface of the pressure plate (19), and a plurality of limiting teeth (18) arranged in a circular array are fixedly provided at the edge of the upper surface of the limiting plate (17), and the limiting teeth (18) are snapped into the inner side of the tooth grooves (20).

6. The screw-on percutaneous puncture needle for radioactive seed implantation according to claim 1, characterized in that: The needle body mechanism comprises an injection needle (27) which slides through the inner side of the guide needle (1); the rear end of the injection needle (27) is fixedly connected to an injection sleeve (28); a connecting handle (29) is fixedly sleeved at the rear end of the outer surface of the injection needle (27); and a gripping opening (30) is provided on the outer surface of the connecting handle (29).

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