Flexible anti-fracture arteriovenous indwelling needle
By setting up a corrugated design with the protrusions and groove structures at the root of the outer needle, the bend and breaking of the arteriovenous indwelling needle when the wrist is moved is solved, and the measurement accuracy and patient comfort are improved.
Patent Information
- Application Number
- CN202421978323.3
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-08-15
- Publication Date
- 2025-07-04
- Estimated Expiration
- 2034-08-15
AI Technical Summary
Existing arteriovenous indwelling needles are prone to bend or break when the wrist joint is moved, resulting in inaccurate measurement and discomfort in the patient, and need to be replaced frequently, which poses a safety risk.
A protruding structure is provided on the outer surface of the root of the outer needle, and a groove structure is provided on the inner surface to form a corrugated structure to increase bending resistance and prevent the outer needle from bending or breaking when the wrist joint is moved.
Effectively prevent the outer needle from bent or broken when the wrist joint is moved, increase the patient's freedom of movement, reduce discomfort, and avoid multiple punctures.
Smart Images
Figure CN223054838U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of medical equipment, in particular to a flexible anti-break arteriovenous indwelling needle. Background Art
[0002] An indwelling needle usually consists of a slender catheter and a needle. The needle includes an outer needle and an inner needle. The indwelling needle is mainly used for multiple intravenous infusions, blood draws, multiple arterial blood draws, arterial pressure measurement, arterial interventional treatment, etc. After one puncture, the indwelling needle maintains a venous access and can be left on the patient's body for multiple uses to reduce the need for repeated needle insertions. By inserting the needle into an artery, a direct reading of blood pressure can be obtained, which is very important for patients who require precise and continuous blood pressure monitoring. This method is more accurate and stable than the traditional blood pressure cuff, especially when the blood pressure fluctuates greatly. Since the arteriovenous indwelling needle for measuring blood pressure is generally inserted at the wrist joint of the patient, it is easy to make the patient feel uncomfortable, and then the patient will move the wrist, which may cause the outer needle to bend. When measuring blood pressure, the obtained data is not accurate enough, affecting the doctor's judgment of the condition; when the movement range of the wrist is large, it is easy to break the outer needle hose, resulting in the outer needle breaking in the blood vessel, causing danger. In addition, re-puncture is required, bringing pain of repeated punctures to the patient.
[0003] Therefore, it is urgent to study an arteriovenous indwelling needle with a flexible structure and anti-bending ability to reduce the discomfort caused by the indwelling needle and the risk of outer needle bending. Summary of the Utility Model
[0004] The purpose of the utility model is to overcome the defects of the above-mentioned prior art and provide a flexible anti-break arteriovenous indwelling needle. By providing a protrusion structure on the outer surface of the root of the outer needle and a groove structure on the inner surface, the formed corrugated structure has a certain anti-bending property, which can effectively prevent the outer needle from being bent or broken when the wrist joint moves.
[0005] The purpose of the utility model can be realized by the following technical solutions:
[0006] The utility model provides a flexible anti-break arteriovenous indwelling needle, including an outer needle and an inner needle. The inner needle is nested in the outer needle. The outer surface of the root of the outer needle is provided with a protrusion structure, and the inner surface of the root of the outer needle is provided with a groove structure.
[0007] Further, the groove structure and the protrusion structure correspond to each other one by one.
[0008] Further, there are at least three pairs of the groove structure and the protrusion structure.
[0009] Further, the material of the outer needle is one of polyurethane, PVC, and fluorinated ethylene propylene copolymer.
[0010] Furthermore, the protrusion structure and the groove structure are corrugated structures.
[0011] Furthermore, the corrugated structures are arranged at equal intervals, and the distance between two adjacent corrugations is 0.1 mm.
[0012] Furthermore, the chamfer radius at the top of the corrugation in the corrugated structure is 0.02 mm, and the peak height of the corrugation is 0.03 mm.
[0013] Furthermore, the protrusion structure and the groove structure are respectively arranged on the outer surface and the circumferential surface of the inner surface at the root of the outer needle.
[0014] Furthermore, the outer diameter of the outer needle is 1 mm, and the inner diameter is 0.8 mm.
[0015] Furthermore, the wall thickness of the outer needle is 0.1 mm.
[0016] Compared with the prior art, the present utility model has the following advantages and beneficial effects:
[0017] By providing a protrusion structure on the outer surface of the root of the outer needle and a groove structure on the inner surface in the present utility model, a corrugated structure is formed. The formed corrugated structure has a certain anti-bending property, which can effectively prevent the outer needle from being bent or broken when the wrist joint moves; at the same time, the outer needle with a corrugated structure can increase the freedom of movement, reduce the discomfort of the patient wearing, and avoid the problem of multiple punctures due to the breakage of the outer needle. BRIEF DESCRIPTION OF THE DRAWINGS
[0018] Figure 1 is a schematic structural diagram of a flexible anti-breakage arteriovenous indwelling needle;
[0019] Figure 2 is Figure 1 an enlarged schematic diagram of the corrugated structure in;
[0020] Figure 3 is Figure 1 a schematic diagram of the size of the corrugated structure in.
[0021] Figure 1 Marking description in:
[0022] 1 - outer needle, 2 - inner needle;
[0023] Figure 2 Marking description in:
[0024] 3 - corrugated structure;
[0025] Figure 3 Marking description in:
[0026] 1 - outer needle. DETAILED DESCRIPTION OF THE EMBODIMENTS
[0027] The following describes the specific implementation manners of the present utility model in detail through embodiments. These embodiments are implemented on the premise of the solutions described in the present utility model, and detailed implementation manners and specific operation processes are given. However, the protection scope of the present utility model is not limited to the following embodiments.
[0028] The present utility model will be further described below in conjunction with the accompanying drawings and specific embodiments. Features such as component models, material names, connection structures, preparation means, materials, structures or composition ratios that are not clearly described in the technical solutions are regarded as common technical features disclosed in the prior art.
[0029] Embodiment 1
[0030] This embodiment provides a flexible anti-fracture arteriovenous indwelling needle. As Figures 1-3 shown, it includes an outer needle 1 and an inner needle 2. The inner needle 2 is nested inside the outer needle 1. A protrusion structure is provided on the outer surface of the root of the outer needle 1, and a groove structure is provided on the inner surface of the root of the outer needle 1. The protrusion structure 3 and the groove structure are respectively provided on the circumferences of the outer surface and the inner surface of the root of the outer needle 1. The groove structure and the protrusion structure correspond one by one and are provided with at least three pairs. The protrusion structure and the groove structure are corrugated structures 3. The corrugated structures 3 are arranged at equal intervals. The distance between two adjacent corrugations is 0.1 mm, the chamfer radius at the top of the corrugation is 0.02 mm, and the peak height of the corrugated structure 3 is 0.03 mm.
[0031] The material of the outer needle 1 is one of polyurethane, PVC, and fluorinated ethylene propylene copolymer. The outer diameter of the outer needle 1 is 1 mm, the inner diameter is 0.8 mm, and the wall thickness of the outer needle 1 is 0.1 mm.
[0032] By providing a protrusion structure on the outer surface of the root of the outer needle 1 and a groove structure on the inner surface, the formed corrugated structure 3 has a certain anti-bending property, which can effectively prevent the outer needle 1 from being bent or broken when the wrist joint moves. The outer needle 1 with the corrugated structure can increase the freedom of movement, reduce the discomfort of the patient wearing, and avoid the problem of multiple punctures due to the fracture of the outer needle.
[0033] The above description of the embodiments is for the convenience of those of ordinary skill in the art to understand and use the utility model. Those skilled in the art can obviously make various modifications to these embodiments easily and apply the general principles described herein to other embodiments without creative labor. Therefore, the present utility model is not limited to the above embodiments, and the improvements and modifications made by those skilled in the art without departing from the scope of the present utility model should be within the protection scope of the present utility model.
Claims
1. A flexible anti-breakage arteriovenous indwelling needle, comprising an outer needle (1) and an inner needle (2), the inner needle (2) being nested inside the outer needle (1), characterized in that, The outer surface of the root of the outer needle (1) is provided with a protrusion structure, and the inner surface of the root of the outer needle (1) is provided with a groove structure.
2. The flexible anti-break arterial and venous indwelling needle according to claim 1, wherein The groove structures and the protrusion structures correspond to each other one by one.
3. The flexible anti-break arterial and venous indwelling needle according to claim 1, wherein, There are at least three pairs of the groove structures and the protrusion structures.
4. The flexible anti-fracture arteriovenous indwelling needle according to claim 1, wherein, The material of the outer needle (1) is one of polyurethane, PVC, and fluorinated ethylene propylene copolymer.
5. A flexible anti-breakage arteriovenous indwelling needle according to claim 1, characterized in that, The protrusion structure and the groove structure are corrugated structures (3).
6. The flexible anti-breakage arteriovenous indwelling needle according to claim 5, characterized in that, The corrugated structures (3) are arranged at equal intervals, and the distance between two adjacent corrugations is 0.1 mm.
7. The flexible anti-fracture arteriovenous indwelling needle according to claim 5, characterized in that, The chamfer radius at the top of the corrugation in the corrugated structure (3) is 0.02 mm, and the wave crest height is 0.03 mm.
8. A flexible anti-breakage arteriovenous indwelling needle according to claim 1, characterized in that, The protrusion structure and the groove structure are respectively arranged on the circumferences of the outer surface and the inner surface of the root of the outer needle (1).
9. The flexible anti-fracture arteriovenous indwelling needle according to claim 1, characterized in that, The outer diameter of the outer needle (1) is 1 mm, and the inner diameter is 0.8 mm.
10. The flexible anti-break arterial and venous indwelling needle according to claim 1, characterized in that, The wall thickness of the outer needle (1) is 0.1 mm.