Negative pressure puncture needle
By creating a negative pressure state inside the puncture needle, and utilizing the triangular needle tip and piston device, the problem of blood or gas leakage during puncture is solved, thus achieving both accuracy and safety in puncture.
Patent Information
- Application Number
- CN202423193335.8
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-12-24
- Publication Date
- 2025-11-04
- Estimated Expiration
- 2034-12-24
AI Technical Summary
Existing percutaneous puncture techniques cannot avoid puncturing capillaries and bronchi, leading to dangers such as air embolism, and blood or gas leaks cannot be detected and dealt with in a timely manner during the puncture process.
Design a negative pressure puncture needle that creates a negative pressure state inside the needle core, uses the hole on the triangular needle tip to promptly discharge blood or gas, and monitors the puncture status by changing the piston position, enabling timely treatment.
It improves the accuracy and safety of puncture, enabling timely detection and removal of blood or gas, and preventing dangers such as air embolism.
Smart Images
Figure CN223504306U_ABST
Abstract
Description
Technical Field
[0001] This utility model belongs to the field of medical devices, specifically relating to a negative pressure puncture needle. Background Technology
[0002] In recent years, with the continuous development of minimally invasive and precision medicine, percutaneous puncture diagnosis and treatment have become increasingly popular among doctors and patients. Percutaneous puncture biopsy diagnosis and various minimally invasive treatments all require a percutaneous puncture needle to establish a channel.
[0003] For example, in biopsy, a needle is inserted into a tumor to extract tumor tissue for pathological analysis; in radiotherapy, a hollow implantation needle is inserted into the tumor, and the radiation source travels along the needle to deliver the radiation. All these procedures require determining the correct angle at which the needle punctures the patient's body. A correct puncture angle avoids normal tissues such as blood vessels and bones.
[0004] To ensure accuracy, percutaneous punctures are typically designed with precise angles and depths to avoid important nerves and blood vessels. However, percutaneous punctures are essentially blind procedures, making it difficult to avoid puncturing capillaries and bronchi. Furthermore, while punctures require the body to be still, the body is not truly static; the intestines, lungs, and trachea are constantly in motion. Therefore, even if a blood vessel is punctured, it may not be detected in time. Another issue, such as during a lung puncture, if a bronchus is punctured followed by a capillary puncture, air can easily enter the capillary, potentially causing air embolism.
[0005] To address the aforementioned problems, this invention provides a negative pressure puncture needle. Utility Model Content
[0006] To address the aforementioned problems, this invention aims to provide a negative pressure puncture needle that can create a negative pressure state within the needle, so that when blood and air are punctured into a blood vessel or bronchus during the puncture process, the puncture situation can be promptly assessed.
[0007] To achieve the above objectives, the present invention adopts the following technical solution: a negative pressure puncture needle, comprising a needle core and a needle sleeve arranged coaxially, wherein the needle core is a hollow needle core; a negative pressure device is connected to the rear end of the needle core, the negative pressure device comprising a piston cylinder and a piston rod, wherein a piston is provided at the front end of the piston rod, and the piston rod can move the piston up and down along the piston cylinder; a fixing device is also provided on the negative pressure device, and the fixing device can fix the piston rod.
[0008] Furthermore, the piston rod is triangular in shape, and a limiting ring is provided at the end of the piston cylinder. The limiting ring has notches corresponding to the three edges of the piston rod.
[0009] Furthermore, the fixing device is a slot evenly arranged on the piston rod along its axial direction.
[0010] Furthermore, the front end of the needle core is a triangular needle tip, and each end face of the needle tip is provided with a hole, which is connected to the interior of the needle core.
[0011] Furthermore, the rear end of the needle core is provided with a needle core handle, and the rear end of the needle sleeve is provided with a needle sleeve handle. The needle core handle and the needle sleeve handle are connected by a Luer connector.
[0012] Furthermore, the needle sleeve handle and the piston cylinder are threaded together.
[0013] Furthermore, a cap is screwed onto the rear end of the needle sheath handle.
[0014] In use, the negative pressure puncture needle of this invention involves first inserting the needle into the body, then pulling the piston rod backward. The piston rod is then fixed in place by a fixing device, thus securing the piston at a specific position within the piston cylinder. Since the tip of the puncture needle is already inserted into the body and in a sealed state, the backward-pulling piston creates a negative pressure within the piston cylinder. As the needle continues to penetrate downward, even if a blood vessel or bronchus is accidentally punctured, blood or gas can be released through the hole in the triangular needle tip and the needle core under negative pressure, entering the negative pressure device. Changes in color or piston position allow for timely monitoring of the puncture progress and the removal of blood or gas, preventing potential dangers. Attached Figure Description
[0015] Figure 1 This is a schematic diagram of the overall structure of the negative pressure puncture needle of this utility model;
[0016] Figure 2 for Figure 1 A cross-sectional view of the top;
[0017] Figure 3 for Figure 1 A cross-sectional view of the rear end;
[0018] Figure 4 for Figure 3 Enlarged view of the rear;
[0019] In the above figure: 1-needle core; 11-hole; 12-needle core handle; 2-needle sleeve; 21-needle sleeve handle; 3-negative pressure device; 31-piston cylinder; 311-limiting ring; 312-notch; 32-piston rod; 321-slot; 33-piston. Detailed Implementation
[0020] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only for explaining this utility model and are not intended to limit this utility model.
[0021] To ensure accuracy, percutaneous punctures are typically designed with precise angles and depths to avoid important nerves and blood vessels. However, percutaneous punctures are essentially blind procedures, making it difficult to avoid puncturing capillaries and bronchi. Furthermore, while punctures require the body to be still, the body is not truly static; the intestines, lungs, and trachea are constantly in motion. Therefore, even if a blood vessel is punctured, it may not be detected in time. Another issue, such as during a lung puncture, if a bronchus is punctured followed by a capillary puncture, air can easily enter the capillary, potentially causing air embolism.
[0022] To address the aforementioned problems, this invention provides a negative pressure puncture needle, such as... Figure 1 As shown, it includes a needle core 1 and a needle sleeve 2 arranged coaxially.
[0023] like Figure 2 As shown, the needle core 1 is a hollow needle core with a triangular needle tip at its front end. The tip of the triangular needle tip has three end faces, each with a hole 11, which communicates with the interior of the needle core 1. The use of a triangular needle tip in the needle core 1 facilitates puncture, and the hollow nature of the needle core 1, along with the holes 11 on each end face communicating with the interior of the needle core 1, makes it easier to administer anesthesia during puncture, reducing patient discomfort.
[0024] The needle core 1 has a needle core handle 12 at its rear end, and the needle sleeve 2 has a needle sleeve handle 21 at its rear end. The needle core handle 12 and the needle sleeve handle 21 are connected by a Luer connector. The Luer connector has a simple structure, is easy to connect, and can ensure a tight seal after connection.
[0025] like Figure 1 As shown, a negative pressure device 3 is connected to the rear end of the needle core. This negative pressure device has a structure similar to that of a regular syringe, and is a sealed structure. Figure 3 As shown, the negative pressure device 3 includes a piston cylinder 31 and a piston rod 32. A piston 33 is provided at the front end of the piston rod 32. The piston rod 32 can move the piston 33 up and down along the piston cylinder 31. The negative pressure device 3 is also provided with a fixing device, which can fix the piston rod 32 and thus fix the piston 33 at a certain position in the piston cylinder 31.
[0026] In use, the puncture needle is first inserted into the body, and the piston rod 32 is pulled back. The piston rod 32 is then fixed by a fixing device, thereby fixing the piston 33 at a certain position in the piston cylinder 31. Since the tip of the puncture needle has already pierced the body and is in a sealed state, the piston 33 pulled back at this time creates a negative pressure state inside the piston cylinder 31. When the puncture needle continues to pierce downwards, even if a blood vessel or bronchus is accidentally punctured, blood or gas can still enter the negative pressure device through the hole 11 on the tip of the triangular needle and the needle core 1 under negative pressure. By observing changes in color or piston position, the puncture situation can be monitored in a timely manner, and blood or gas can be expelled to prevent danger.
[0027] The fixing device in the above example can be configured in various ways. For example, a fixing ring can be fitted between the tail of the piston rod 32 and the piston cylinder 31 to fix the piston rod 32 and the piston cylinder 31 relative to each other, thereby fixing the piston 33 at a certain position in the piston cylinder 31, thus realizing the negative pressure function of the puncture needle.
[0028] Of course, there are other structures, and in one specific embodiment, another specific structure of the fixing device is provided.
[0029] Furthermore, the piston rod 32 is triangular in shape, such as... Figure 4 As shown, a limiting ring 311 is provided at the end of the piston cylinder 31, and notches 312 are respectively provided on the limiting ring 311 corresponding to the three edges of the piston rod 32. This embodiment provides a way for the piston rod 32 and the piston cylinder 31 to cooperate. Based on the above structure, the fixing device can be set as a slot 321 evenly arranged along the axial direction of the piston rod 32. In use, when the three edges of the piston rod 32 are aligned with the notches 312, the piston rod 32 can be smoothly pulled along the piston cylinder 31. When a negative pressure state is to be formed, when the slot 321 is aligned with the notches 312, the piston rod is rotated so that the three edges of the piston rod 32 are no longer aligned with the notches 312. At this time, the piston rod 32 and the piston cylinder 31 can be relatively fixed by the cooperation of the retaining ring 311 and the slot 321, thereby fixing the piston 33 at a certain position in the piston cylinder 31, so that a negative pressure state can be formed in the piston cylinder 31.
[0030] The slots 321 are evenly arranged along the axis of the piston rod 32. Therefore, by matching different slots 321 with the retaining ring 311, negative pressure states of different pressure magnitudes can be formed, and appropriate pressure can be selected according to different situations.
[0031] Furthermore, the needle sleeve handle 31 and the piston cylinder 31 are threaded together, facilitating disassembly and installation.
[0032] Furthermore, a cap is screwed onto the rear end of the needle sheath handle 31. After the negative pressure device is removed, the cap can be screwed onto the needle sheath handle 31, so that the puncture needle can be used like a normal puncture needle when there is no negative pressure device.
[0033] It should be understood that those skilled in the art can make improvements or modifications based on the above description, and all such improvements and modifications should fall within the protection scope of the appended claims.
Claims
1. A negative pressure puncture needle, comprising a needle core and a needle sheath coaxially arranged, wherein the needle core is a hollow needle core; characterized in that, The needle core is connected to a negative pressure device at its rear end. The negative pressure device includes a piston cylinder and a piston rod. A piston is provided at the front end of the piston rod. The piston rod can move the piston up and down along the piston cylinder. A fixing device is also provided on the negative pressure device. The fixing device can fix the piston rod.
2. The negative pressure puncture needle according to claim 1, characterized in that, The piston rod is triangular in shape, and a limiting ring is provided at the end of the piston cylinder. The limiting ring has notches corresponding to the three edges of the piston rod.
3. The negative pressure puncture needle according to claim 2, characterized in that, The fixing device is a slot that is evenly arranged on the piston rod along its axial direction.
4. The negative pressure puncture needle according to claim 3, characterized in that, The front end of the needle core is a triangular needle tip, and each end face of the needle tip is provided with a hole, which is connected to the interior of the needle core.
5. The negative pressure puncture needle according to claim 4, characterized in that, The needle core has a needle core handle at its rear end, and the needle sleeve has a needle sleeve handle at its rear end. The needle core handle and the needle sleeve handle are connected by a Luer connector.
6. The negative pressure puncture needle according to claim 5, characterized in that, The needle sleeve handle and the piston cylinder are threaded together.
7. The negative pressure puncture needle according to claim 6, characterized in that, A cap is also screwed onto the rear end of the needle sheath handle.