Radio frequency trocar with scale marks

Abstract

The utility model provides a radio frequency trocar with scale marks, which solves the problems of insertion depth control and the like of a trocar, and comprises a needle tube, a tube seat fixed at the end of the needle tube, a needle core inserted in the needle tube in a sliding manner, a core seat connected with the needle core and inserted in the tube seat, and a coating coated with an insulating material on the surface of the needle tube, indicating scales are distributed on the coating in the axial direction of the needle tube, a positioning assembly opposite to the indicating scales is installed on the outer side of the coating in a sliding mode, and a locking assembly opposite to the positioning assembly is installed on the tube base. The utility model has the advantages of compact structure, good scale indication effect and the like.

Description

TECHNICAL FIELD

[0001] The utility model belongs to the technical field of radio frequency cannula needle, and particularly relates to a radio frequency cannula needle with scale marks. BACKGROUND

[0002] The radio frequency cannula needle is usually used with a radio frequency temperature control coagulator, and the radio frequency temperature control coagulator is composed of a machine body and an electrode cannula needle. The cannula needle is divided into a needle core and a sleeve, the outer sleeve has a Teflon coating, is robust and durable, the needle body is elastic, and the outer surface is lubricated. The machine body is usually composed of a radio frequency generator, a radio frequency electrode, a cable, a neutral electrode and a foot switch. Radio frequency current is generated between the electrodes. It is used for ablation and coagulation of tissues and organs. However, in the actual use process, the existing sleeve does not have scale marks, which can easily cause medical staff to be unable to accurately control the depth in the puncture process, increasing the working difficulty of medical staff. The conventional marking method is not obvious, and the depth position control error is large.

[0003] In order to solve the problems in the prior art, people have carried out long-term exploration and proposed various solutions. For example, the patent literature discloses a radio frequency ablation electrode needle [201921138414.5], which comprises a handle and an electrode, the electrode comprises a sleeve, an electrode tube and a screw rod, the sleeve is sleeved in the electrode tube, the inner wall of the electrode tube is provided with an internal thread matched with the screw rod, the inner wall of the sleeve is provided with a protrusion fixedly connected with the sleeve, and the outer side wall of the electrode tube is provided with a sliding groove matched with the protrusion. The rotation of the electrode tube is limited by the cooperation of the protrusion and the sliding groove, so that the electrode tube can move along the axial direction of the screw rod by the rotation of the screw rod. The scale disc and the mark gap provided on the handle are used to quantitatively adjust the length of the radio frequency ablation electrode needle.

[0004] The above-mentioned scheme solves the problem of scale indication to some extent, but the scheme still has many problems, such as poor insertion depth position control effect. SUMMARY

[0005] The utility model aims at the above -mentioned problem, provides a kind of radio frequency cannula needle with scale mark with reasonable design, depth position control effect good.

[0006] To achieve the above object, the utility model adopts the following technical scheme: a radio frequency cannula needle with scale mark, including needle tube, needle tube end is fixed with tube seat, needle core is slidably inserted in needle tube, needle core is connected with the core seat of tube seat insertion, needle tube surface is coated with the coating of insulating material, coating is distributed with indicating scale along needle tube axial direction, the positioning assembly opposite with indicating scale is slidably installed outside coating, tube seat is installed with the locking assembly opposite with positioning assembly.

[0007] The limiting assembly is connected with the locking assembly.

[0008] The limiting assembly comprises a limiting port arranged on the inner side of the tube base, limiting step surfaces arranged on the limiting port and the core base and mutually adhered, and limiting teeth arranged between the limiting step surfaces and mutually meshed.

[0009] The locking assembly comprises a locking block slidingly arranged in the tube base, a locking hook arranged at the end of the locking block, a locking slot arranged on the positioning assembly and used for clamping the locking hook, and a guiding locking surface arranged between the locking block and the tube base and used for guiding the locking hook to clamp or separate from the locking slot.

[0010] The positioning assembly comprises a positioning ring slidingly arranged on the outer side of the coating layer, and the positioning ring is internally provided with the indicating assembly.

[0011] The positioning ring is externally provided with a fixing ring, the fixing ring is provided with a fixing block extending to the inner side of the positioning ring, the positioning ring is provided with a fixing slot through which the fixing block passes, a guiding fixing surface is arranged between the fixing block and the fixing slot and used for guiding the fixing block to move along the radial direction, and the fixing block and the fixing slot are respectively arranged in a central symmetry mode.

[0012] The indicating assembly comprises a pressure sensor arranged on the side of the positioning ring away from the tube base and the core base, and the pressure sensor is connected with a light-emitting unit through a master control unit.

[0013] The needle tube and the needle core are made of stainless steel, and the coating layer is made of polytetrafluoroethylene.

[0014] The tube base and the core base are made of polycarbonate.

[0015] The tube base and the core base are provided with anti-skid stripes.

[0016] Compared with the prior art, the coating layer is provided with an indicating scale for depth indication, the positioning assembly and the locking assembly are provided for indicating and limiting the scale, so that the control precision of the depth of the sleeve insertion is improved, the locking assembly is unlocked after the tube base contacts the needle tube, the positioning assembly is enabled after the sleeve assembly is completed, the positioning assembly is clamped and fixed with the coating layer, so that the maximum insertion depth is controlled, and the operation safety is improved. BRIEF DESCRIPTION OF DRAWINGS

[0017] Fig. 1It is a structure schematic view of the utility model;

[0018] Fig. 2 It is a partial sectional view of the utility model;

[0019] Fig. 3 It is another partial sectional view of the utility model;

[0020] In the figure, needle tube 1, pipe base 2, limiting assembly 21, limiting mouth 22, limiting step surface 23, limiting tooth 24, needle core 3, core base 4, coating 5, indicating scale 6, positioning assembly 7, positioning ring 71, fixed ring 72, fixed block 73, fixed groove 74, guiding fixed surface 75, pressure sensor 76, light emitting unit 77, locking assembly 8, locking block 81, locking hook 82, locking groove 83, guiding locking surface 84. Specific implementation

[0021] The utility model will be made further detailed explanation in combination with the specific implementation and the drawing.

[0022] As Figs. 1-3 Indicated, a kind of scale identification radio frequency hub needle, similar to the existing hub structure, the present embodiment also includes needle tube 1, needle tube 1 end head is fixed with pipe base 2, needle core 3 is slidably inserted in needle tube 1, needle core 3 is connected with the core base 4 of pipe base 2 insertion, needle tube 1 surface is covered with the coating 5 of insulating material, needle tube 1 is divided into insulating part and conducting part by coating 5, needle tube 1 end head is sharp. Indicating scale 6 is distributed on the coating 5 along needle tube 1 axial direction, positioning assembly 7 opposite indicating scale 6 is slidably installed on the outside of coating 5, pipe base 2 is installed with the locking assembly 8 opposite positioning assembly 7. Indicating scale 6 is positioned by positioning assembly 7, and the depth of insertion of needle tube 1 is limited.

[0023] Specifically, unlike conventional seat body switching structure, limiting assembly 21 is arranged between pipe base 2 and core base 4 in the present embodiment, and limiting assembly 21 is linked with locking assembly 8. When needle core 3 is completely inserted into needle tube 1, limiting assembly 21 ensures its combination stability, and ensures subsequent stable puncture.

[0024] In-depth, in order to realize the circumferential and axial limiting of pipe base 2 and core base 4, limiting assembly 21 includes limiting mouth 22 arranged on the inner side of pipe base 2, limiting step surface 23 is arranged between limiting mouth 22 and core base 4, limiting tooth 24 is arranged between limiting step surface 23. Pipe base 2 and core base 4 are closely combined, and drive locking assembly 8 linkage.

[0025] Further, the locking assembly 8 adopts a top pressing linkage, specifically including a locking block 81 slidingly installed in the tube seat 2, the locking block 81 being provided with a locking hook 82 at the end thereof, the positioning assembly 7 being provided with a locking groove 83 for clamping the locking hook 82, and the locking block 81 being provided with a guide locking surface 84 for guiding the locking hook 82 to clamp or separate from the locking groove 83. The locking block 81 is pressed against the core seat 4, so that the locking block 81 slides, and the locking hook 82 is radially away from each other to be separated from the locking groove 83.

[0026] Further, the positioning assembly 7 includes a positioning ring 71 slidingly installed outside the coating 5, the positioning ring 71 being internally provided with an indicating assembly for indicating the position of the positioning ring 71 relative to the indicating scale 6, and the indicating assembly being contacted and pressed for sensing when puncturing.

[0027] In addition, in order to ensure the axial position of the positioning ring 71 relative to the needle tube 1 is stable, the positioning ring 71 is rotatably installed outside the fixing ring 72, the fixing ring 72 being provided with a fixing block 73 extending to the inside of the positioning ring 71, the positioning ring 71 being provided with a fixing groove 74 for the fixing block 73 to pass through, the fixing block 73 and the fixing groove 74 being respectively arranged in a central symmetry, and the fixing block 73 and the fixing groove 74 being provided with a guide fixing surface 75 for guiding the fixing block 73 to move radially. Rotating the fixing ring 72 makes the fixing block 73 rotate and relatively close radially, so as to apply a pressing force to the coating 5.

[0028] Meanwhile, the indicating assembly includes a pressure sensor 76 arranged on the side of the positioning ring 71 away from the tube seat 2 and the core seat 4, and the pressure sensor 76 is connected with a light-emitting unit 77 through a master control unit. When inserting, the positioning ring 71 on the tube seat 2 contacts the body surface, and the pressure sensor 76 contacts and senses to make the light-emitting unit 77 on the positioning ring 71 emit light for indication.

[0029] Obviously, the needle tube 1 and the needle core 3 are made of stainless steel, and the coating 5 is made of polytetrafluoroethylene, so that the trocar has good high-temperature resistance and is convenient for disinfection and recycling.

[0030] Obviously, the tube seat 2 and the core seat 4 are made of polycarbonate material, and the tube seat 2 and the core seat 4 are provided with anti-skid stripes. The tube seat 2 and the core seat 4 have a certain elasticity, and a better matching allowance is obtained during use.

[0031] In summary, the principle of the embodiment is that the needle tube 1 and the needle core 3 are slidingly inserted, the tube seat 2 and the core seat 4 are pressed and tightly adhered to each other, the indicating scale 6 of the external coating 5 indicates the depth when the needle tube 1 is inserted, and the positioning assembly 7 and the locking assembly 8 limit and accurately control the insertion depth.

[0032] The specific embodiments described herein are merely illustrative of the present application. Various modifications or changes can be made to the specific embodiments described herein by those skilled in the art without departing from the spirit of the present application, or the scope of the appended claims.

[0033] Although the terms such as needle tube 1, tube seat 2, limiting assembly 21, limiting port 22, limiting step surface 23, limiting tooth 24, needle core 3, core seat 4, coating 5, indicating scale 6, positioning assembly 7, positioning ring 71, fixing ring 72, fixing block 73, fixing groove 74, guiding fixing surface 75, pressure sensor 76, light-emitting unit 77, locking assembly 8, locking block 81, locking hook 82, locking groove 83, guiding locking surface 84 are used more frequently herein, the possibility of using other terms is not excluded. The use of these terms is merely for the convenience of describing and explaining the essence of the present application; any interpretation of them as any kind of additional limitation is contrary to the spirit of the present application.

Claims

1. A radio frequency cannula needle with scale mark, comprising a needle tube (1), a tube base (2) fixed at the end of the needle tube (1), a needle core (3) slidingly inserted into the needle tube (1), and a core base (4) connected with the tube base (2) and inserted into the needle core (3), characterized in that, The needle tube (1) is coated with an insulating material, and the coating (5) is provided with an indicating scale (6) along the axial direction of the needle tube (1), and the outer side of the coating (5) is slidably provided with a positioning assembly (7) opposite to the indicating scale (6), and the tube seat (2) is provided with a locking assembly (8) opposite to the positioning assembly (7).

2. A radio frequency cannula needle having a graduated marker according to claim 1, wherein, The tube seat (2) and the core seat (4) are provided with a limiting assembly (21) which is linked with the locking assembly (8).

3. A radio frequency cannula needle having a graduated marker according to claim 2, wherein, The limiting assembly (21) includes a limiting port (22) provided on the inner side of the tube seat (2), and the limiting port (22) and the core seat (4) are provided with mutually abutting limiting step surfaces (23), and the limiting step surfaces (23) are provided with mutually meshing limiting teeth (24).

4. A radio frequency cannula needle having a graduated marker according to claim 3, wherein, The locking assembly (8) includes a locking block (81) slidably provided in the tube seat (2), and the end of the locking block (81) is provided with a locking hook (82), and the positioning assembly (7) is provided with a locking groove (83) for clamping the locking hook (82), and the locking block (81) and the tube seat (2) are provided with a guide locking surface (84) for guiding the locking hook (82) to be clamped or separated from the locking groove (83).

5. A radio frequency cannula needle having a graduated marker according to claim 4, wherein, The positioning assembly (7) includes a positioning ring (71) slidably provided on the outer side of the coating (5), and the positioning ring (71) is provided with an indicating assembly.

6. A radio frequency cannula needle having a graduated marker according to claim 5, wherein, The outer side of the positioning ring (71) is rotatably provided with a fixing ring (72), and the fixing ring (72) has a fixing block (73) extending to the inner side of the positioning ring (71), and the positioning ring (71) is provided with a fixing groove (74) for the fixing block (73) to pass through, and the fixing block (73) and the fixing groove (74) are respectively arranged in a central symmetry.

7. A radio frequency cannula needle having a graduated marker according to claim 5, wherein, The indicating assembly includes a pressure sensor (76) provided on the side of the positioning ring (71) away from the tube seat (2) and the core seat (4), and the pressure sensor (76) is connected with a light emitting unit (77) through a master control unit.

8. The graduated RF cannula of claim 1 wherein, The needle tube (1) and the needle core (3) are made of stainless steel, and the coating (5) is made of polytetrafluoroethylene.

9. The graduated RF cannula of claim 1 wherein, The tube seat (2) and the core seat (4) are made of polycarbonate.

10. The radio frequency cannula according to claim 1, wherein, The tube seat (2) and the core seat (4) are provided with anti-skid stripes.

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