Remaining needle capable of buffering and limiting
By introducing a buffer pad and connecting structure into the indwelling needle, the problems of exposed needle tip and pressure damage are solved, achieving safe and comfortable indwelling needle operation.
Patent Information
- Application Number
- CN202520232874.3
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-02-14
- Publication Date
- 2025-12-30
- Estimated Expiration
- 2035-02-14
AI Technical Summary
The exposed needle tip of the indwelling needle poses a danger before use, and requires different force during use, increasing the difficulty. Pressure injury can easily occur when the needle hub is fixed.
An indwelling needle comprising a needle hub, a puncture needle assembly, an extension tube, a water-stop clamp, a buffer pad, and a connecting structure has been designed. The buffer pad reduces pressure damage, and the connecting structure enables limiting and automatic needle withdrawal, preventing the needle tip from being exposed and simplifying the operation.
It improves the safety and comfort of using indwelling needles, reduces the difficulty of operation, reduces pressure injuries, and enhances the safety and convenience of use.
Smart Images
Figure CN223731867U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model relates to medical instrument technical field, concretely is a kind of indwelling needle of buffering limit. BACKGROUND
[0002] Indwelling needle is also called intravenous cannula needle, and is a kind of infusion tool, which is composed of a puncture needle assembly, a soft outer sleeve and a needle seat. During puncture, the outer sleeve and the puncture needle core are inserted into the blood vessel together. After the sleeve is sent into the blood vessel, the needle core is extracted, and the soft outer sleeve is left in the blood vessel, so as to realize infusion.
[0003] At present, the needle tip of the puncture needle is usually exposed outside the outer sleeve before use, which has certain danger. The puncture needle assembly and the needle seat are usually connected by clamping, so that the medical staff needs to use more force to realize the needle extraction operation during blood return and needle core withdrawal. After the needle extraction is completed, the medical staff needs to immediately change the force to avoid the needle insertion too fast, which increases the difficulty of using the indwelling needle. After the indwelling needle is successfully inserted, the needle seat needs to be fixed, and the needle seat is closely attached to the skin of the patient, which is easy to cause pressure injury. Based on this, the present application provides an indwelling needle capable of buffering and limiting. UTILITY MODEL CONTENT
[0004] The utility model provides an indwelling needle capable of buffering and limiting, which solves the problem that the needle tip of the puncture needle is usually exposed outside the outer sleeve before use, which has certain danger. During use of the indwelling needle, the force needs to be changed, which increases the difficulty of using the indwelling needle. During fixation of the needle seat, the needle seat is closely attached to the skin of the patient, which is easy to cause pressure injury.
[0005] The utility model provides the following technical scheme: an indwelling needle capable of buffering and limiting, comprising a needle seat, a puncture needle assembly, an extension tube connected with the needle seat, a water stop clamp arranged on the extension tube, an infusion interface and a medicine adding interface arranged at one end of the extension tube away from the needle seat, the puncture needle assembly comprising a needle rod, a squeezing handle connected with one side of the needle rod, a puncture needle connected with the middle part of the inner cavity of the needle rod, and a protective cap connected with the needle rod through an extension rod, the protective cap being movably sleeved on the puncture needle.
[0006] The bottom of the tail end of the needle seat is provided with a buffer pad, one side of the tail end of the needle seat is provided with a limiting handle, and the front end of the needle seat is provided with a hose; a connecting structure is arranged in the inner cavity of the needle seat, and the puncture needle assembly is connected with the needle seat through the connecting structure; the connecting structure comprises, in sequence, a blocking plug, a fixing ring, a clamping ring and an extrusion ring, the blocking plug, the fixing ring and the clamping ring are fixedly connected with the inner wall of the needle seat, the blocking plug is located on the side of the fixing ring close to the hose, the side of the needle rod close to the hose is in contact with the extrusion ring, the protective cap is clamped with the inner cavity of the clamping ring, the protective cap is movably connected with the inner cavity of the extrusion ring, the extrusion ring is movably connected with the inner cavity of the needle seat, the extrusion ring is connected with the fixing ring through a spring, and the other end of the puncture needle penetrates through the fixing ring and the blocking plug and extends into the inner cavity of the hose.
[0007] Preferably, the end of the needle rod close to the hose is movably connected with the inner cavity of the needle seat.
[0008] Preferably, the outer diameter of the extrusion ring is greater than the outer diameter of the end of the needle rod close to the hose, and the inner diameter of the extrusion ring is less than the inner diameter of the end of the needle rod close to the hose.
[0009] Preferably, the limiting handle and the needle seat are connected in a detachable manner, and the size of the end of the limiting handle away from the needle seat is greater than the size of the end of the extrusion handle away from the needle seat.
[0010] Preferably, the extrusion handle and the limiting handle are located on the same side of the needle seat.
[0011] Preferably, when the telescopic rod is at the longest length, the needle tip of the puncture needle is located in the inner cavity of the protective cap.
[0012] Compared with the prior art, the utility model has the following beneficial effects:
[0013] 1. The indwelling needle capable of buffering and limiting is provided with a buffer pad at the bottom of the tail end of the needle seat, the buffer pad is used for buffering pressure, the tail end of the indwelling needle is prevented from pressing on the skin of a patient, pressure injury caused by the use of the indwelling needle is reduced or lowered, and the comfort of the patient during use is improved.
[0014] 2. The indwelling needle capable of buffering and limiting is provided with a connecting structure, medical staff can limit the puncture needle assembly before puncture operation, the needle tip of the puncture needle is prevented from being exposed outside the hose, the safety of movement of the indwelling needle is improved, and the indwelling needle can realize automatic needle retraction operation through the connecting structure, and the use difficulty of the indwelling needle is lowered. BRIEF DESCRIPTION OF DRAWINGS
[0015] Figure 1 It is a front view of the structure of the utility model;
[0016] Figure 2 It is a structure of the utility modelFigure 1 rear view schematic diagram
[0017] Figure 3 is the sectional view schematic diagram of the needle holder of the utility model structure
[0018] Figure 4 is the sectional view schematic diagram of the needle holder of the utility model structure Figure 3 rear view schematic diagram
[0019] Figure 5 is the sectional view schematic diagram of the needle holder of the utility model structure
[0020] Figure 6 is the sectional view schematic diagram of the needle holder of the utility model structure
[0021] Fig. 1, needle holder; 2, buffer pad; 3, needle rod; 4, extrusion handle; 5, limiting handle; 6, water stop clamp; 7, extension tube; 8, medicine adding interface; 9, infusion interface; 10, hose; 11, puncture needle; 12, plugging plug; 13, fixing ring; 14, clamping ring; 15, protective cap; 16, extrusion ring; 17, spring; 18, telescopic rod; 19, rectangular rod. DETAILED DESCRIPTION
[0022] The technical solutions in the embodiments of the utility model will be clearly and completely described below with reference to the drawings in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, rather than all the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by those skilled in the art without creative labor fall within the protection scope of the utility model.
[0023] Referring to Figures 1 to 6 The utility model provides a kind of indwelling needle of buffering limiting, including needle holder 1, puncture needle assembly, with the extension tube 7 of needle holder 1 connection, water stop clamp 6 is set on extension tube 7, and the end of extension tube 7 away from needle holder 1 is equipped with infusion interface 9 and medicine adding interface 8.The bottom of the tail end of needle holder 1 is equipped with buffer pad 2, and the material of buffer pad 2 can be sponge, by the setting of buffer pad 2, buffering function can be played, avoid indwelling needle tail end to be pressed on patient skin, reduce or reduce the pressure injury formed when indwelling needle is used, and improve the comfort of patient when using, and the side of the tail end of needle holder 1 is equipped with limiting handle 5, limiting handle 5 is connected by detachable connection with needle holder 1, to facilitate the disassembly of limiting handle 5, in some embodiments of the application, the side of limiting handle 5 close to needle holder 1 is equipped with rectangular slot, and rectangular rod 19 is equipped on needle holder 1, rectangular rod is adapted with rectangular slot, after limiting handle 5 is connected with needle holder 1, medical staff can drive needle holder 1 to move using limiting handle 5, and the front end of needle holder 1 is equipped with hose 10.
[0024] The inner cavity of the needle seat 1 is provided with a connecting structure, which comprises, in sequence, a blocking plug 12, a fixing ring 13, a clamping ring 14 and an extrusion ring 16. The blocking plug 12, the fixing ring 13 and the clamping ring 14 are fixedly connected with the inner wall of the needle seat 1, and the blocking plug 12 is located on the side of the fixing ring 13 close to the hose 10. The extrusion ring 16 is connected with the fixing ring 13 through a spring 17. Under the action of external force, the distance between the extrusion ring 16 and the fixing ring 13 can change, and when the restriction on the extrusion ring 16 is removed, the extrusion ring 16 can be reset under the action of the elastic force of the spring 17.
[0025] The puncture needle assembly comprises a needle rod 3, a puncture needle 11 connected with the needle rod 3 and a protective cap 15. The end of the needle rod 3 close to the hose 10 is movably connected with the inner cavity of the needle seat 1. The protective cap 15 movably covers the puncture needle 11. The protective cap 15 is connected with the needle rod 3 through an extension rod 18. When the extension rod 18 is at the longest length, the needle tip of the puncture needle 11 is located in the inner cavity of the protective cap 15, and the protective cap 15 can shield the needle tip of the puncture needle 11 to avoid the needle tip of the puncture needle 11 from pricking the medical staff, thereby improving the safety of the use of the indwelling needle. The extension rod 18 is a prior art. In some embodiments of the present application, the extension rod 18 comprises at least two hollow rod bodies. One rod body in the adjacent two rod bodies is sleeved in the other rod body and can move along the length direction of the rod body. Under the action of external force, the extension rod 18 can realize extension and retraction.
[0026] The outer diameter of the extrusion ring 16 is greater than the outer diameter of the end of the needle rod 3 close to the hose 10, and the inner diameter of the extrusion ring 16 is less than the inner diameter of the end of the needle rod 3 close to the hose 10.
[0027] The puncture needle assembly is connected with the needle seat 1 through the connecting structure. When the puncture needle assembly is connected with the needle seat 1, the protective cap 15 is clamped with the inner cavity of the clamping ring 14, the end of the puncture needle 11 away from the needle rod 3 penetrates through the fixing ring 13 and the blocking plug 12 and extends into the inner cavity of the hose 10, and the extrusion handle 4 and the limiting handle 5 are located on the same side of the needle seat 1. The size of the end of the limiting handle 5 away from the needle seat 1 is greater than the size of the end of the extrusion handle 4 away from the needle seat 1. The medical staff can drive the needle rod 3 to move through the extrusion handle 4. The needle rod 3 can drive the puncture needle 11 to move. When the end of the needle rod 3 away from the hose 10 contacts the needle seat 1, the needle tip part of the puncture needle 11 extends to the outside of the hose 10. The indwelling needle can be punctured. At this time, the needle rod 3 is in contact with the extrusion ring 16, the spring 17 is in a compressed state, and the extrusion handle 4 is in contact with the limiting handle 5; when the needle needs to be withdrawn, the medical staff removes the restriction on the extrusion handle 4. Under the action of the elastic force of the spring 17, the spring 17 can push the needle rod 3 to move outward, the needle rod 3 drives the puncture needle 11 to move, and automatic needle withdrawal operation is realized. During the needle withdrawal process, the protective cap 15 limits the puncture needle 11 to avoid the puncture needle 11 from tilting, thereby facilitating the use of the indwelling needle.
[0028] From the above description, the medical staff can limit the puncture needle assembly before the puncture operation, avoid the needle tip of the puncture needle 11 exposed outside the hose 10, and improve the safety of the movement of the indwelling needle.
[0029] In summary: the indwelling needle with buffering and limiting can be operated by one hand of the medical staff, the index finger of one hand of the medical staff contacts the side of the limiting handle 5 close to the hose 10, the thumb of one hand of the medical staff contacts the side of the extrusion handle 4 away from the hose 10, and the thumb extrudes the extrusion handle 4 until the extrusion handle 4 contacts the limiting handle 5, the needle rod 3 drives the puncture needle 11 to move in the moving process of the extrusion handle 4, and the needle tip of the puncture needle 11 moves to the outside of the hose 10 when the extrusion handle 4 stops moving, so that the medical staff can perform the puncture operation, when the needle needs to be retracted, the medical staff slides the thumb to change the state from contacting the extrusion handle 4 to contacting the limiting handle 5, under the action of the elastic force of the spring 17, the spring 17 drives the needle rod 3 to move outward, the needle rod 3 drives the puncture needle 11 to move, and the automatic needle retraction operation can be realized, after the needle retraction is completed, the medical staff can continue to move the indwelling needle until the hose 10 completely enters the blood vessel, one hand of the medical staff fixes the needle seat 1, and the other hand moves the needle rod 3 outward, the telescopic rod 18 is in a gradually lengthened state in the moving process of the needle rod 3 driving the puncture needle 11, the needle rod 3 continues to move to drive the protective cap 15 to move through the telescopic rod 18 when the telescopic rod 18 is in the longest length, the protective cap 15 is separated from the clasp 14, and the dismounting operation of the puncture needle assembly is completed, the medical staff removes the limiting handle 5, performs the fixing operation of the indwelling needle, and the buffer pad 2 can play a buffering function, so that the tail end of the indwelling needle is prevented from pressing on the skin of the patient, the pressure injury formed during the use of the indwelling needle is reduced or eliminated, and the comfort of the patient during use is improved.
[0030] The standard parts used in the utility model can be purchased from the market, the special-shaped parts can be ordered according to the description and the drawings, the specific connection mode of each part adopts the conventional means such as bolts in the prior art, the machinery, parts and equipment adopt conventional models in the prior art, and details are not described herein, the contents not described in detail in the description belong to the prior art known by the person skilled in the art, although the embodiments of the utility model have been shown and described, it can be understood by the person skilled in the art that the embodiments can be changed, modified, replaced and modified in various manners without departing from the principles and spirits of the utility model, and the scope of the utility model is defined by the appended claims and equivalents thereof.
Claims
1. An indwelling needle with buffering and limiting function, comprising a needle hub (1), a puncture needle assembly, an extension tube (7) connected to the needle hub (1), and a water-stop clamp (6) disposed on the extension tube (7), wherein the end of the extension tube (7) away from the needle hub (1) is provided with an infusion port (9) and a drug delivery port (8), characterized in that: The puncture needle assembly comprises a needle rod (3), a pressing handle (4) connected with one side of the needle rod (3), a puncture needle (11) connected with the middle part of the inner cavity of the needle rod (3), and a protective cap (15) connected with the needle rod (3) through an extension rod (18), wherein the protective cap (15) is movably sleeved on the puncture needle (11). The bottom of the tail end of the needle seat (1) is provided with a buffer pad (2), one side of the tail end of the needle seat (1) is provided with a limiting handle (5), and the front end of the needle seat (1) is provided with a hose (10); a connecting structure is arranged in the inner cavity of the needle seat (1), and the puncture needle assembly is connected with the needle seat (1) through the connecting structure; the connecting structure comprises, in sequence, a blocking plug (12), a fixing ring (13), a clamping ring (14) and a pressing ring (16), the blocking plug (12), the fixing ring (13) and the clamping ring (14) are fixedly connected with the inner wall of the needle seat (1), the blocking plug (12) is located on the side of the fixing ring (13) close to the hose (10), the side of the needle rod (3) close to the hose (10) is in contact with the pressing ring (16), the protective cap (15) is connected with the inner cavity of the clamping ring (14), the protective cap (15) is movably connected with the inner cavity of the pressing ring (16), the pressing ring (16) is movably connected with the inner cavity of the needle seat (1), the pressing ring (16) is connected with the fixing ring (13) through a spring (17), and the other end of the puncture needle (11) penetrates through the fixing ring (13) and the blocking plug (12) and extends into the inner cavity of the hose (10).
2. The needle according to claim 1, wherein: The end of the needle rod (3) close to the hose (10) is movably connected with the inner cavity of the needle seat (1).
3. The needle according to claim 2, wherein: The outer diameter of the pressing ring (16) is greater than the outer diameter of the end of the needle rod (3) close to the hose (10), and the inner diameter of the pressing ring (16) is smaller than the inner diameter of the end of the needle rod (3) close to the hose (10).
4. The needle according to claim 1, wherein: The limiting handle (5) and the needle seat (1) are connected in a detachable manner, and the size of the end of the limiting handle (5) away from the needle seat (1) is greater than the size of the end of the pressing handle (4) away from the needle seat (1).
5. The needle according to claim 1, wherein: The pressing handle (4) and the limiting handle (5) are located on the same side of the needle seat (1).
6. The needle according to claim 1, wherein: When the extension rod (18) is at the longest length, the needle tip of the puncture needle (11) is located in the inner cavity of the protective cap (15).