Rotary cutting electric coagulation hemostasis needle
By setting a discharge electrode at the needle tip of the rotary cutting needle and using electrocoagulation technology to make the water molecules in the cells generate heat through friction to form a blood clot, the problem that the rotary cutting needle cannot stop bleeding in time is solved, and a simple and efficient hemostasis effect is achieved.
Patent Information
- Application Number
- CN202422021713.8
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-08-20
- Publication Date
- 2025-09-09
- Estimated Expiration
- 2034-08-20
AI Technical Summary
Existing rotary cutting needles cannot stop bleeding promptly and effectively after biopsy, resulting in wound bleeding and hematoma, increasing patient pain. In addition, traditional hemostasis methods are cumbersome to operate and have poor effects.
A discharge electrode is set at the needle tip of the rotary cutting needle to achieve hemostasis through electrocoagulation. High-frequency voltage or current is used to cause friction and heat generation of water molecules in the cells, causing blood to coagulate and form a blood clot.
The device has a simple structure and is easy to operate, thus achieving a hemostatic effect, reducing wound bleeding and hematoma, and alleviating the pain of the patient.
Smart Images
Figure CN223311239U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of medical devices, in particular to a rotary cutting and electrocoagulation hemostatic needle. Background Art
[0002] The rotary cutting needle is a medical device used for biopsy. It is suitable for various organs such as the kidneys, liver, lungs, breasts, thyroid, prostate, pancreas, testicles, uterus, ovaries, and body surface. It can be used to take samples of living tissue, absorb cells, and then send them for further diagnosis and treatment.
[0003] During surgery, the sharp tip of a rotary cutting needle penetrates the body. Once at the sampling site, the cutting blade extracts the sample from the affected area. Once the sample is successfully collected, it is drawn into the sample reservoir through negative pressure, completing the procedure. However, the physical damage to human tissue can damage blood vessels and capillaries, leading to bleeding. Biopsies typically cause significant needle tract trauma. If bleeding is not stopped promptly, it can lead to hematomas, exacerbating the patient's pain. In these cases, a doctor or nurse must apply physical pressure or inject powdered or liquid medications through the rotary cutting needle, which are ineffective and cumbersome.
[0004] It is very necessary to effectively stop bleeding of the surgical wound in time after surgery to relieve the patient's pain. However, the existing rotary cutting needles have no hemostatic function, so there is an urgent need to develop rotary cutting needle products with hemostatic function. Utility Model Content
[0005] In view of this, the present invention proposes a rotary cutting and electrocoagulation hemostatic needle, which can solve the above-mentioned existing technical problems. The present invention provides the following technical solutions:
[0006] The utility model discloses a rotary cutting electrocoagulation hemostatic needle, comprising: an outer needle tube, having a receiving cavity and an axial slot for biopsy sampling; an inner needle tube, located inside the receiving cavity and capable of moving along the axial direction of the outer needle tube; a distal needle tip, made of a conductive material, located at the farthest end of the outer needle tube, and serving as an electrode for electrode discharge to achieve electrocoagulation hemostasis; an insulating member, used to electrically isolate the distal needle tip from the outer needle tube; and a wire, used to connect the distal needle tip to a power supply module.
[0007] Optionally, it also includes: a skin-attached electrode sheet, which is electrically connected to the power supply module; wherein the distal needle tip serves as the first electrode, the skin-attached electrode sheet serves as the second electrode, and the first electrode and the second electrode have opposite polarities.
[0008] Optionally, the distal needle tip includes: a first part serving as a first electrode and a second part serving as a second electrode, the first electrode and the second electrode having opposite polarities; the insulating member also includes an electrode isolator, the electrode isolator is located between the first part and the second part, and the electrode isolator is used to electrically isolate the first part and the second part.
[0009] Optionally, the electrode separator is located on the central axis of the rotary cutting electrocoagulation hemostatic needle; the first part and the second part have the same shape and are symmetrically arranged on both sides of the electrode separator.
[0010] Optionally, the first part and the second part have different shapes, and the tip of the distal needle tip belongs to one of the first part and the second part.
[0011] Optionally, the electrode separator is made of ceramic.
[0012] Optionally, the insulating member is made of ceramic.
[0013] Optionally, the power supply module is used to provide high-frequency voltage / current required for electrode discharge.
[0014] Optionally, the outer needle tube includes: a first cavity for accommodating the inner needle tube, and a second cavity for accommodating the guide wire, and the first cavity is parallel to the second cavity.
[0015] Optionally, the distal needle tip is conical with multiple cutting edges.
[0016] According to the technical solution of the utility model, a discharge electrode is provided at the needle head of the rotary cutting needle, and hemostasis is achieved by electrocoagulation, which has the advantages of simple structure and convenient operation. BRIEF DESCRIPTION OF THE DRAWINGS
[0017] For the purpose of illustration and not limitation, the present invention will now be described according to its preferred embodiments, particularly with reference to the accompanying drawings, in which:
[0018] Figure 1A This is a schematic diagram of the rotary cutting and electrocoagulation hemostatic needle according to the first embodiment of the present utility model;
[0019] Figure 1B This is a schematic diagram of the insulating member of the rotary cutting electrocoagulation hemostatic needle according to the first embodiment of the present utility model;
[0020] Figure 1C This is a cross-sectional view of the outer needle tube and guide wire of the rotary cutting electrocoagulation hemostatic needle according to the first embodiment of the present invention;
[0021] Figure 2A This is a schematic diagram of a rotary cutting and electrocoagulation hemostatic needle according to the second embodiment of the present utility model;
[0022] Figure 2B This is a schematic diagram of the insulating member of the rotary cutting and electrocoagulation hemostatic needle according to the second embodiment of the present utility model;
[0023] Figure 2C This is a cross-sectional view of the outer needle tube and guide wire of the rotary cutting electrocoagulation hemostatic needle according to the second embodiment of the present invention;
[0024] Figure 3A This is a schematic diagram of the rotary cutting and electrocoagulation hemostatic needle according to the third embodiment of the present utility model;
[0025] Figure 3B Schematic diagram of the insulating member of the rotary cutting and electrocoagulation hemostatic needle according to the third embodiment of the present invention;
[0026] Figure 3C This is a cross-sectional view of the outer needle tube and wire of the rotary cutting electrocoagulation hemostatic needle in embodiment 3 of the present invention.
[0027] In the picture:
[0028] 1-outer needle tube; 11-axial slot; 12-first cavity; 13-second cavity; 2-inner needle tube; 3-distal needle tip; 31-first part; 32-second part; 4-insulating member; 41-electrode spacer; 42-wire hole; 5-wire; 6-power supply module; 7-skin-attached electrode sheet. DETAILED DESCRIPTION
[0029] The following is a clear and complete description of the technical solution of the present invention in conjunction with the accompanying drawings. Obviously, the embodiments described are only some of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making any creative efforts are within the scope of protection of the present invention.
[0030] In the description of this utility model, it should be noted that, unless otherwise expressly specified or limited, terms such as "mounted" and "connected" should be understood in a broad sense. For example, they may refer to fixed connection, detachable connection, or integral connection; mechanical connection or electrical connection; direct connection or indirect connection through an intermediate medium; or internal communication between two components. Those skilled in the art will understand the specific meanings of these terms in this utility model in specific circumstances.
[0031] In the description of the present utility model, it needs to be understood that the "proximal end" refers to the end of the rotary cutting electrocoagulation hemostatic needle that is relatively close to the operator when the operator holds the rotary cutting electrocoagulation hemostatic needle, and correspondingly, the "distal end" refers to the end of the rotary cutting electrocoagulation hemostatic needle that is relatively far from the operator when the operator holds the rotary cutting electrocoagulation hemostatic needle.
[0032] The rotary cutting and electrocoagulation hemostatic needle of the embodiment of the utility model comprises: an outer needle tube 1, an inner needle tube 2, a distal needle tip 3, an insulating member 4, and a wire 5.
[0033] The outer needle tube 1 has a receiving cavity and an axial slot 11 for biopsy sampling. The inner needle tube 2 is located within the receiving cavity and can move axially along the outer needle tube 1. The distal needle tip 3 is made of a conductive material and located at the farthest end of the outer needle tube 1. It serves as an electrode for discharge to achieve electrocoagulation and hemostasis. The distal needle tip 3 is sharp, which facilitates puncture and entry into the human body. The insulator 4 electrically isolates the distal needle tip 3 from the outer needle tube 1. The wire 5 connects the distal needle tip to the power supply module 6.
[0034] The outer needle tube 1 also includes a first cavity 12 for accommodating the inner needle tube 2 and a second cavity 13 for accommodating the guidewire 5. The first cavity 12 and the second cavity 13 are parallel to each other. The guidewire 5 can be single or paired. Since the inner needle tube 2 moves in and out relative to the outer needle tube 1 during use, the provision of separate cavities to isolate the inner needle tube and the guidewire can help protect the guidewire from the movement of the inner needle tube, enhance the stability of the device, and extend its service life.
[0035] The power supply module 6 is used to provide the high-frequency voltage / current required for electrode discharge. The high-frequency voltage / current can effectively excite the two electrodes to achieve electrocoagulation hemostasis. The working principle of the electrocoagulation hemostatic needle is: when the electrodes are activated (i.e., a high-frequency voltage or high-frequency current is applied to the paired electrodes), the water molecules in the cells between the positive and negative electrodes generate heat by friction during high-speed movement (converting kinetic energy into thermal energy), the blood temperature rises, the soluble proproteins in the plasma become insoluble protein monomers, and thrombin turns the protein monomers into protein polymers. The protein polymers are interwoven into a network, forming a blood clot within the blood cell network, thereby completing the coagulation process. According to the technical solution of the present utility model, a discharge electrode is provided at the needle tip of the rotary cutting needle, and hemostasis is achieved by electrocoagulation, which has the advantages of simple structure and easy operation.
[0036] Figure 1A Schematic diagram of the rotary cutting and electrocoagulation hemostatic needle 100 according to the first embodiment of the present invention; Figure 1B A schematic diagram of the insulating member therein; Figure 1C The figure shows the cross section of the outer needle tube and the wire. Figures 1A to 1CAs shown, the rotary electrocoagulation hemostatic needle 100 also includes a skin-attached electrode sheet 7. The skin-attached electrode sheet 7 is electrically connected to the power supply module 6. The distal needle tip 3 serves as the first electrode, and the skin-attached electrode sheet 7 serves as the second electrode. The polarity of the first electrode is opposite to that of the second electrode. When the rotary electrocoagulation hemostatic needle 100 is used for coagulation and hemostasis, the skin-attached electrode sheet 7 needs to be attached to the skin surface close to the surgical site in advance. When the power switch of the power supply module 6 is closed, the power supply module 6 outputs electrical energy, and the electrical energy denatures the protein at the wound through the distal needle tip 3 to achieve monopolar electrocoagulation.
[0037] Figure 2A Schematic diagram of the rotary cutting and electrocoagulation hemostatic needle 200 according to the second embodiment of the present invention; Figure 2B A schematic diagram of the insulating member therein; Figure 2C This is a cross-sectional view of the outer needle tube and wire. Figure 3A Schematic diagram of the rotary cutting and electrocoagulation hemostatic needle 300 according to the third embodiment of the present invention; Figure 3B A schematic diagram of the insulating member therein; Figure 3C The figure shows a cross-sectional view of the outer needle tube and the wire. In the rotary electrocoagulation hemostatic needle 200 and the rotary electrocoagulation hemostatic needle 300, the distal needle tip 3 may include a first part 31 and a second part 32. The first part 31 serves as a first electrode, and the second part 32 serves as a second electrode. The first electrode and the second electrode have opposite polarities. The insulating member 4 also includes an electrode separator 41 and a wire perforation 42. The electrode separator 41 is located between the first part 31 and the second part 32 and is used to separate the first part 31 and the second part 32. The first part 31 and the second part 32 can be made of conductive materials such as metal, and the electrode separator 41 can be made of ceramic.
[0038] In the rotary coagulation hemostatic needle 200 of Example 2, the electrode separator 41 is positioned on the central axis of the needle. The first and second portions 31, 32 are identical in shape and symmetrically arranged on either side of the electrode separator 41. This design offers the advantages of symmetry and ease of fabrication. Furthermore, the distal end of the rotary coagulation hemostatic needle 200 is a ceramic tip. Because discharge occurs through the electrodes on either side of the ceramic, rather than through the ceramic insulating material, the discharge achieves a superior coagulation effect.
[0039] In the rotary electrocoagulation hemostatic needle 300 of the third embodiment, the electrode separator 41 is a thin sheet with a bent edge. The first portion 31 and the second portion 32 have different shapes, and the tip of the distal needle tip 3 belongs to the first portion 31. It should be noted that in other embodiments, the tip of the distal needle tip 3 may also belong to the second portion 32. The advantage of the asymmetric design of the first portion 31 and the second portion 32 is that the tip of the distal needle tip 3 is completely preserved and is not inserted into the electrode separator 41, so that the metal distal needle tip 3 is sharp and easier to puncture into tissue.
[0040] In the rotary cutting and electrocoagulation hemostatic needle of the embodiment of the present utility model, Figure 1A 、 Figure 2A and Figure 3A As shown, the overall shape of the distal needle tip 3 is a cone with multiple rotary cutting edges. Compared with the traditional conical distal needle tip, the distal needle tip has multiple blades, which are conducive to tip discharge, thereby facilitating electrocoagulation and hemostasis.
[0041] The above specific embodiments do not limit the scope of protection of this utility model. Those skilled in the art will understand that various modifications, combinations, sub-combinations, and substitutions may occur depending on design requirements and other factors. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this utility model shall be included in the scope of protection of this utility model.
Claims
1. A rotary cutting and electrocoagulation hemostatic needle, characterized in that: include: an outer needle tube having a receiving cavity and an axial slot for biopsy sampling; An inner needle tube is located inside the receiving cavity and is movable along the axial direction of the outer needle tube; a distal needle tip, made of a conductive material, located at the distal end of the outer needle tube and serving as an electrode for discharge to achieve electrocoagulation hemostasis; an insulating member, used for electrically isolating the distal needle tip from the outer needle tube; A wire is used to connect the distal needle tip to a power supply module.
2. The rotary cutting electrocoagulation hemostatic needle according to claim 1, characterized in that: Also includes: A skin-attached electrode sheet is electrically connected to the power supply module; wherein the distal needle tip serves as a first electrode, the skin-attached electrode sheet serves as a second electrode, and the first electrode and the second electrode have opposite polarities.
3. The rotary cutting electrocoagulation hemostatic needle according to claim 1, characterized in that: The distal needle tip comprises: a first portion serving as a first electrode and a second portion serving as a second electrode, wherein the first electrode and the second electrode have opposite polarities; The insulating member further includes an electrode separator, the electrode separator being located between the first portion and the second portion, and being used to electrically isolate the first portion from the second portion.
4. The rotary cutting electrocoagulation hemostatic needle according to claim 3, characterized in that: The electrode separator is located on the central axis of the rotary cutting and electrocoagulation hemostatic needle; The first part and the second part have the same shape and are symmetrically arranged on both sides of the electrode separator.
5. The rotary cutting electrocoagulation hemostatic needle according to claim 3, characterized in that: The first portion and the second portion have different shapes, and the tip of the distal needle tip belongs to one of the first portion and the second portion.
6. The rotary cutting electrocoagulation hemostatic needle according to claim 3, characterized in that: The electrode separator is made of ceramic.
7. The rotary cutting electrocoagulation hemostatic needle according to any one of claims 1 to 6, characterized in that: The insulating member is made of ceramic.
8. The rotary cutting electrocoagulation hemostatic needle according to any one of claims 1 to 6, characterized in that: The power supply module is used to provide the high-frequency voltage / current required for electrode discharge.
9. The rotary cutting electrocoagulation hemostatic needle according to any one of claims 1 to 6, characterized in that: The outer needle tube includes a first cavity for accommodating the inner needle tube and a second cavity for accommodating the guide wire, wherein the first cavity is parallel to the second cavity.
10. The rotary cutting electrocoagulation hemostatic needle according to any one of claims 1 to 6, characterized in that: The distal needle tip is conical with multiple cutting edges.