A spinal puncture probe with dual-material insulation

Abstract

This utility model discloses a spinal puncture probe with dual-material insulation, relating to the field of medical devices. It includes a handle, a puncture needle, and a cable. The root of the puncture needle is detachably fixed to the handle. The puncture needle includes an inner electrode, an outer electrode, a first insulating tube, and a second insulating tube. The outer electrode is sleeved over the inner electrode. Both the inner electrode and the outer electrode are made of conductive material. The first and second insulating tubes are sleeved between the outer electrode and the inner electrode. The first insulating tube is located at the tip of the puncture needle, and the second insulating tube is located in the main body section behind the tip. The ends of the first and second insulating tubes are connected, and the first insulating tube has a higher hardness than the second insulating tube. The internal insulation layer of this utility model uses two materials with different hardnesses, giving the needle tip both excellent mechanical strength and effectively controlling manufacturing costs.

Description

Technical Field

[0001] This utility model relates to the field of medical devices, specifically to a spinal puncture probe with dual-material insulation. Background Technology

[0002] In the field of minimally invasive spinal surgery, the spinal puncture probe is one of the key instruments for achieving precise treatment. Current technologies using a single insulating material to separate the inner and outer electrodes have certain limitations. This structure makes it difficult to balance the mechanical strength of the needle tip with the overall cost-effectiveness of the instrument.

[0003] Currently, most common spinal puncture probes use a single polymer material for electrode insulation, such as the utility model patent CN202510350848.5, which uses parylene as the insulating layer between electrodes. This type of material lacks sufficient hardness at the needle tip, making it prone to wear or deformation during puncture, thus affecting puncture accuracy. Existing technology has not yet effectively solved the problem of balancing needle tip hardness with manufacturing cost. Utility Model Content

[0004] To address the aforementioned technical problems, this utility model proposes a spinal puncture probe with dual-material insulation.

[0005] The technical solution of this utility model is as follows: A spinal puncture probe with dual-material insulation includes a handle, a puncture needle, and a cable. The root of the puncture needle is detachably fixed to the handle. The puncture needle includes an inner electrode, an outer electrode, a first insulating tube, and a second insulating tube. The outer electrode is sleeved outside the inner electrode. Both the inner electrode and the outer electrode are made of conductive material. The first insulating tube and the second insulating tube are sleeved between the outer electrode and the inner electrode. The first insulating tube is located at the tip of the puncture needle, and the second insulating tube is located in the main body section behind the tip. The ends of the first insulating tube and the second insulating tube are connected. The first insulating tube has a higher hardness than the second insulating tube.

[0006] Preferably, the first insulating tube is made of zirconia ceramic material, which utilizes its high hardness to enhance the puncture performance of the needle tip. Furthermore, the biocompatibility of zirconia ceramic material is superior to that of conventional polymer materials, further ensuring the biosafety of the puncture needle when used inside the human body. The second insulating tube is made of PTFE material to reduce the manufacturing cost of the non-working section.

[0007] Preferably, the inner electrode needle is fixedly connected to both the first and second insulating tubes using adhesive, and the amount of adhesive used per unit area between the inner electrode needle and the second insulating tube is less than that used per unit area between the inner electrode needle and the first insulating tube. Different amounts of adhesive are applied for different materials to reduce manufacturing costs while ensuring the bonding strength of the needle tip.

[0008] Preferably, the inner diameters of the first insulating tube and the second insulating tube are the same, both matching the outer diameter of the inner electrode needle. The outer diameter of the first insulating tube is larger than that of the second insulating tube to ensure the mechanical strength of the first insulating tube.

[0009] Preferably, the inner wall of the outer electrode tube is provided with a stepped structure, which includes a first step and a second step. The inner diameter of the first step matches the outer diameter of the first insulating tube, and the inner diameter of the second step matches the outer diameter of the second insulating tube. Both insulating tubes are tightly fitted to the inner wall of the outer electrode tube to ensure structural stability.

[0010] Preferably, the outer diameter of the first insulating tube is 1~2mm and the length is 8~12mm. Within this size range, the first insulating tube can provide sufficient mechanical strength for the puncture needle.

[0011] Preferably, the tip of the puncture needle has multiple circumferentially distributed bevels. The end face of the inner electrode, the end face of the outer electrode tube, and the end face of the first insulating tube together form the bevels. The multiple bevels form a sharp tip to facilitate tissue puncture.

[0012] Preferably, the number of needle tip bevels is three, and the three needle tip bevels are evenly distributed circumferentially so that the needle tip is subjected to balanced force during puncture.

[0013] Preferably, there are multiple longitudinal arc surfaces between the outer circular surface of the puncture needle and the beveled surface of the needle tip. The number of longitudinal arc surfaces is six, and the six longitudinal arc surfaces are evenly distributed circumferentially, which helps to disperse the puncture resistance and guide the needle body to smoothly enter the tissue.

[0014] Preferably, the handle is equipped with an identification chip, an LED light, and a buzzer. The cable includes a chip wire connecting the identification chip, a light wire connecting the LED light, a buzzer wire connecting the buzzer, an inner electrode wire connecting the inner electrode needle, and an outer electrode wire connecting the outer electrode tube, thereby realizing the function of electrical signal transmission and puncture status indication.

[0015] This invention utilizes a dual-material insulation layer composed of zirconia ceramic and PTFE, concentrating the high-hardness ceramic in the needle tip section to significantly improve puncture strength and durability, while the main body section uses PTFE, effectively controlling costs. Combined with a multi-sensory prompting system consisting of a recognition chip, LED light, and buzzer, this probe achieves an optimized balance between performance and cost, while also integrating more intuitive and closer-to-the-surgical-area needle tip position indication, significantly improving the accuracy and safety of surgical procedures. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the structure of a spinal puncture probe with dual-material insulation according to the present invention; Figure 2 This invention relates to the internal structure of the handle of a spinal puncture probe with dual-material insulation. Figure 3 This is a cross-sectional view of the tip segment of the puncture needle of this utility model; Figure 4 This is a partial structural diagram of the tip segment of the puncture needle of this utility model.

[0017] Reference numerals: 1-Handle, 2-Punch needle, 3-Cable, 11-Quick-connection structure, 12-Inner electrode spring, 13-Outer electrode spring, 14-Identification chip, 15-LED light, 16-Buzzer, 21-Inner electrode needle, 22-Outer electrode tube, 23-First insulating tube, 24-Second insulating tube, 25-Sheath tube. Detailed Implementation

[0018] To further illustrate the technical means and effects adopted by this utility model in order to achieve the intended utility model purpose, the following detailed description of the specific implementation methods, structure, features and effects of this utility model is provided in conjunction with the accompanying drawings and preferred embodiments.

[0019] A spinal puncture probe with dual material insulation includes a handle 1, a puncture needle 2 and a cable 3, wherein the root of the puncture needle 2 is detachably fixed to the handle 1 via a quick-connect structure 11.

[0020] The puncture needle 2 includes an inner electrode 21, an outer electrode 22, a first insulating tube 23, a second insulating tube 24, and a sheath 25. The outer electrode 22 is fitted over the inner electrode 21. Both the inner electrode 21 and the outer electrode 22 are made of conductive materials. The sheath 25, fitted over the outer electrode 22, is made of flexible insulating material and wraps around the main part of the outer electrode 22 near the handle 1, providing insulation and protection. The first insulating tube 23 and the second insulating tube 24 are fitted side-by-side between the outer electrode 22 and the inner electrode 21 to electrically isolate the outer electrode 22 from the inner electrode 21. The first insulating tube 23 is made of zirconia ceramic, and the second insulating tube 24 is made of PTFE. Zirconia ceramic not only has high hardness and strong wear resistance, but its biocompatibility is also superior to common polymer materials such as PTFE and PEEK, making it more suitable for surgical use and further ensuring the biosafety of the puncture needle when used inside the human body. The first insulating tube 23 and the second insulating tube 24 are connected at their ends. The first insulating tube 23 is located at the tip of the needle, while the second insulating tube 24 is located in the main body section behind the first insulating tube 23. The length of the first insulating tube 23 is approximately 10 mm. Compared to the second insulating tube 24, the ceramic material provides greater hardness. The inner electrode needle 21 is bonded to the first insulating tube 23, and the inner electrode needle 21 is also bonded to the second insulating tube 24, but with less adhesive. The outer diameter of the first insulating tube 23 is approximately 1.6 mm, and the outer diameter of the second insulating tube 24 is thinner than that of the first insulating tube 23. The inner wall of the outer electrode tube 22 has a stepped structure, including a first step and a second step. The inner diameter of the first step matches the outer diameter of the first insulating tube 23, and the inner diameter of the second step matches the outer diameter of the second insulating tube 24. This ensures that the inner wall of the outer electrode tube 22 is in close contact with the outer walls of the second insulating tube 24 and the first insulating tube 23, guaranteeing structural stability. At the same time, the side end face of the step also provides support for the first insulating tube 23. The puncture needle 2 has three beveled surfaces with evenly distributed circumferential angles at the tip. Between the outer circular surface of the puncture needle 2 and the beveled surfaces, there are also six longitudinally distributed arc surfaces with evenly distributed circumferential angles to mitigate the angle change between the beveled surfaces and the outer circular surface. The beveled surfaces are quadrilaterals, with two sides connecting to adjacent beveled surfaces and the other two sides tangent to the two longitudinally distributed arc surfaces. The end face of the inner electrode 21, the end face of the outer electrode tube 22, and the end face of the first insulating tube 23 together form a smooth beveled surface.

[0021] The handle 1 has an inner electrode spring 12 and an outer electrode spring 13 fixed inside. The inner electrode spring 12 is elastic and can clamp the inner electrode needle 21 and be electrically connected to the inner electrode needle 21. The outer electrode spring 13 is also elastic and can clamp the outer electrode tube 22 and be electrically connected to the outer electrode tube 22.

[0022] The handle 1 also contains an identification chip 14, an LED light 15, and a buzzer. The handle 1 has a transparent area through which the light from the LED light 15 can be transmitted. The identification chip 14 is used to identify the bone layer where the needle tip is located. The LED light 15 is a multi-color LED with different light colors and flashing frequencies, which, combined with the sound prompts from the buzzer, indicate which bone layer the needle tip is located in.

[0023] One end of cable 3 is located inside handle 1, and the other end is connected to a host interface for connecting to an external host. Cable 3 includes a chip wire, an LED wire, a buzzer wire, an inner electrode wire, and an outer electrode wire. The end inside handle 1 is connected to the identification chip 14, LED light 15, buzzer, inner electrode needle 21, and outer electrode tube 22, respectively. Cable 3 is covered with an insulating layer.

[0024] In actual operation, the user installs the puncture needle 2 onto the handle 1 via the quick-connect structure 11, and the cable 3 connects to the main unit. The main unit provides power and signal processing functions. The identification chip 14 transmits the information detected by the tip of the puncture needle 2 to the main unit via the cable 3. After analysis, the main unit provides feedback to the LED light 15 and the buzzer for prompting.

[0025] The above description is merely a preferred embodiment of the present utility model and is not intended to limit the present utility model in any way. Although the present utility model has been disclosed above with reference to a preferred embodiment, it is not intended to limit the present utility model. Any person skilled in the art can make some modifications or alterations to the above-disclosed technical content to create equivalent embodiments without departing from the scope of the present utility model. Any brief modifications, equivalent changes and alterations made to the above embodiments based on the technical essence of the present utility model without departing from the scope of the present utility model shall still fall within the scope of the present utility model.

Claims

1. A spinal puncture probe with dual-material insulation, characterized in that, The device includes a handle, a puncture needle, and a cable. The root of the puncture needle is detachably fixed to the handle. The puncture needle includes an inner electrode, an outer electrode, a first insulating tube, and a second insulating tube. The outer electrode is sleeved outside the inner electrode. Both the inner electrode and the outer electrode are made of conductive material. The first insulating tube and the second insulating tube are sleeved between the outer electrode and the inner electrode. The first insulating tube is located at the tip of the puncture needle, and the second insulating tube is located at the body section behind the tip. The ends of the first insulating tube and the second insulating tube are connected. The first insulating tube has a higher hardness than the second insulating tube.

2. The spinal puncture probe with dual-material insulation according to claim 1, characterized in that, The first insulating tube is made of zirconia ceramic, and the second insulating tube is made of PTFE.

3. The spinal puncture probe with dual-material insulation according to claim 1, characterized in that, The inner electrode needle is fixedly connected to the first insulating tube and the second insulating tube by adhesive, and the amount of adhesive used per unit area between the inner electrode needle and the second insulating tube is less than the amount of adhesive used per unit area between the inner electrode needle and the first insulating tube.

4. The spinal puncture probe with dual-material insulation according to claim 1, characterized in that, The first insulating tube and the second insulating tube have the same inner diameter, which matches the outer diameter of the inner electrode needle. The outer diameter of the first insulating tube is larger than that of the second insulating tube.

5. A spinal puncture probe with dual-material insulation according to claim 4, characterized in that, The inner wall of the outer electrode tube is provided with a stepped structure, which includes a first step and a second step. The inner diameter of the first step matches the outer diameter of the first insulating tube, and the inner diameter of the second step matches the outer diameter of the second insulating tube.

6. The spinal puncture probe with dual-material insulation according to claim 1, characterized in that, The outer diameter of the first insulating tube is 1~2mm and the length is 8~12mm.

7. The spinal puncture probe with dual-material insulation according to claim 1, characterized in that, The tip of the puncture needle has multiple circumferentially distributed bevels, which together form the bevels of the inner electrode, the outer electrode tube, and the first insulating tube.

8. A spinal puncture probe with dual-material insulation according to claim 7, characterized in that, The needle tip has three bevels, which are evenly distributed circumferentially.

9. A spinal puncture probe with dual-material insulation according to claim 7, characterized in that, There are multiple longitudinal arc surfaces between the outer circular surface of the puncture needle and the beveled surface of the needle tip. There are six longitudinal arc surfaces, which are evenly distributed circumferentially.

10. A spinal puncture probe with dual-material insulation according to claim 1, characterized in that, The handle contains an identification chip, an LED light, and a buzzer. The cable includes a chip wire connecting the identification chip, a light wire connecting the LED light, a buzzer wire connecting the buzzer, an inner electrode wire connecting the inner electrode needle, and an outer electrode wire connecting the outer electrode tube.

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