Double-cavity remaining needle

Abstract

The utility model discloses a double-cavity indwelling needle, which relates to the technical field of medical instruments and comprises a needle body component, a shunting mechanism is arranged on the surface of the needle body component, a medicine injection mechanism is arranged on the surface of the shunting mechanism, and an indwelling needle catheter is arranged on the surface of the shunting mechanism. The isolation plug is matched with the catheter body, so that a cavity is formed in the catheter body, medicine injected by the second medicine connecting column can enter the cavity formed by the isolation plug and the catheter body through the connecting hole, and when the puncture needle body is pulled out, the medicine can flow into the catheter main cavity in the catheter main body through the connecting hole and is injected into the body of a patient. When two different drugs need to be injected, the drugs enter the connecting tube through the first drug connecting column, one end of the connecting tube is connected with the catheter auxiliary cavity, so that the drugs enter the catheter auxiliary cavity through the connecting tube and are injected into the body of a patient, the connecting tube is isolated from the cavity in the tube body, so that the drugs cannot influence each other, and the adaptability of the device is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of medical devices, in particular to a double-lumen indwelling needle. Background Art

[0002] An intravenous catheter, also known as an intravenous cannula, consists of a soft catheter / cannula that can be placed in the blood vessel, and a stainless steel puncture guide needle. During use, the catheter and needle are inserted into the blood vessel together. Once the catheter is fully inserted, the needle is withdrawn, leaving only the soft catheter in the vessel for infusion therapy. Using an intravenous catheter can reduce the pain and fear of injections caused by repeated venipunctures in children, alleviate parental anxiety, facilitate clinical medication use, and provide emergency treatment for critically ill patients, reduce nurses' workload, and alleviate pain in children.

[0003] Patent publication number CN207768837U discloses a double-lumen indwelling needle, including an indwelling needle cannula, a puncture needle, a needle seat, a needle handle, an extension tube, a one-handed water-stop clamp and an indwelling needle sheath.

[0004] In order to solve the problem that the infusion channels of the drug solution are independent of each other and do not react with each other, the existing technology adopts a double-cavity structure from the cannula to the needle seat to form two independent infusion channels, which are handled in a non-interference manner. However, there is still a situation where the puncture needle and the catheter are integrated and the puncture needle cannot be removed after puncture, which leads to the problem of increasing the patient's pain. Utility Model Content

[0005] The purpose of the present invention is to provide a double-lumen indwelling needle to solve the problems raised in the above background technology.

[0006] In order to solve the above technical problems, the technical solution adopted by the present invention is:

[0007] A double-lumen indwelling needle comprises a needle body assembly, a shunt mechanism is arranged on the surface of the needle body assembly, a drug injection mechanism is arranged on the surface of the shunt mechanism, and an indwelling needle catheter is arranged on the surface of the shunt mechanism.

[0008] The diversion mechanism includes a tube body, which is movably mounted on the surface of the needle assembly. An isolation plug is fixedly mounted inside the tube body, and a fixed block is fixedly mounted on the surface of the isolation plug. The fixed block is movably mounted on the surface of the needle assembly, and the fixed block and the tube body form a cavity.

[0009] A further improvement of the technical solution of the present invention is that a first drug connecting column is fixedly mounted on the surface of the tube body, a connecting tube is fixedly mounted on the surface of the first drug connecting column, and one end of the connecting tube is fixedly mounted on the surface of the indwelling needle catheter.

[0010] A further improvement of the technical solution of the present utility model is that the diversion mechanism also includes a second drug connecting column, which is fixedly installed on the surface of the tube body, and a connecting hole is provided at one end of the second drug connecting column, and the second drug connecting column is adapted to the tube body.

[0011] A further improvement of the technical solution of the present utility model is that the indwelling needle catheter includes a catheter body, the catheter body is fixedly mounted on the surface of the tube body, a catheter main cavity is provided inside the catheter body, the catheter main cavity is circular, and a catheter sub-cavity is provided inside the catheter body, the catheter sub-cavity is crescent-shaped.

[0012] A further improvement of the technical solution of the present utility model is that: the needle body assembly includes a limiting fixing seat, the limiting fixing seat is movably installed inside the tube body, a needle cap is fixedly installed on the surface of the limiting fixing seat, a needle holding handle is fixedly installed on the surface of the needle cap, anti-slip bumps are evenly distributed on the surface of the needle holding handle, a puncture needle body is fixedly installed on the surface of the limiting fixing seat, and the puncture needle body is movably installed inside the main cavity of the catheter and extends to the outside of the main cavity of the catheter.

[0013] A further improvement of the technical solution of the present utility model is that the drug injection mechanism includes a fixing seat, which is fixedly mounted on the surfaces of the first drug connecting column and the second drug connecting column, an extension tube is fixedly mounted on the surface of the fixing seat, and a single-handed current limiting clamp is movably mounted on the surface of the extension tube.

[0014] A further improvement of the technical solution of the present utility model is that the drug injection mechanism further comprises a three-way drug injection tube, the three-way drug injection tube is fixedly mounted on one end of the extension tube, and a heparin cap is movably mounted on the surface of the three-way drug injection tube.

[0015] Due to the adoption of the above technical solution, the present invention has achieved the following technical advancements compared to the prior art:

[0016] 1. The utility model provides a double-lumen indwelling needle, which adopts a tube body, an isolation plug, a fixing block, a first drug connecting column, a second drug connecting column, a connecting hole, a connecting tube catheter body, a main cavity of the catheter, and a secondary cavity of the catheter. By arranging the isolation plug inside the tube body, when the puncture needle body passes through the isolation plug, the fixing block limits the puncture needle body, so that the puncture needle body can accurately enter the main cavity of the catheter. At the same time, the isolation plug cooperates with the tube body to form a cavity inside the tube body, and the drug injected by the second drug connecting column can enter the cavity formed by the isolation plug and the tube body through the connecting hole. When the puncture needle body is pulled out, the drug can flow into the main cavity of the catheter inside the catheter body through the connecting hole and be injected into the patient's body. When two different drugs need to be injected, the drugs enter the connecting tube through the first drug connecting column, and one end of the connecting tube is connected to the secondary cavity of the catheter so that the drugs enter the secondary cavity of the catheter through the connecting tube and are injected into the patient's body. The isolation between the connecting tube and the cavity inside the tube body prevents the drugs from affecting each other, thereby improving the adaptability of the device.

[0017] 2. The utility model provides a double-lumen indwelling needle, which adopts the cooperation of a needle cap, a limiting fixing seat, a puncture needle body, and a needle holding handle. The limiting fixing seat is inserted into the tube body, so that the puncture needle body is limited. After the puncture needle body passes through the isolation plug, it can accurately locate the fixing block and pass through, preventing the puncture needle body from being unable to pass through the fixing block due to tilt. When the puncture needle body needs to be pulled out after the puncture, the user pinches the needle holding handle on the surface of the needle cap and pulls it. The anti-slip bumps on the surface of the needle holding handle prevent the hand from slipping when pulling it out. The needle holding handle drives the limiting fixing seat. The length of the limiting fixing seat ensures that the puncture needle body remains stable before it leaves the patient's body, reducing pain caused by movement and improving the adaptability of the device.

[0018] 3. The utility model provides a double-lumen indwelling needle, which adopts the combination of a fixing seat, an extension tube, a one-handed flow limiting clamp, a three-way drug injection tube, and a heparin cap. The first drug connecting column and the second drug connecting column are connected by the fixing seat, and a one-handed flow limiting clamp is provided on the surface of the extension tube. When it is necessary to control the flow rate of the drug, the one-handed flow limiting clamp squeezes the extension tube to slow down the speed of drug injection. At the same time, one end of the three-way drug injection tube is connected to the injection drug, and the other end is connected to the heparin cap, which can reduce blood reflux, prevent blockage, and improve the adaptability of the device. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a schematic diagram of the three-dimensional structure of the utility model;

[0020] Figure 2 This is a schematic structural diagram of the axial view of the utility model;

[0021] Figure 3 This is a structural diagram of a cross-sectional view of the diversion mechanism of the utility model;

[0022] Figure 4This is a schematic structural diagram of the indwelling needle catheter of the utility model;

[0023] Figure 5 This is a schematic structural diagram of the needle assembly of the utility model;

[0024] Figure 6 It is a structural diagram of the medicine injection mechanism of the present utility model.

[0025] In the figure: 1. Needle body assembly; 11. Needle cap; 12. Limit fixing seat; 13. Puncture needle body; 14. Needle holding handle; 2. Diverter mechanism; 21. Tube body; 22. Isolation plug; 23. Fixing block; 24. First drug connecting column; 25. Second drug connecting column; 26. Connecting hole; 27. Connecting tube; 3. Drug injection mechanism; 31. Fixing seat; 32. Extension tube; 33. One-handed flow limiting clamp; 34. Three-way drug injection tube; 35. Heparin cap; 4. Indwelling needle catheter; 41. Catheter body; 42. Catheter main cavity; 43. Catheter secondary cavity. DETAILED DESCRIPTION

[0026] The present invention is further described in detail below with reference to the embodiments:

[0027] Example 1

[0028] like Figure 1-6 As shown, the utility model provides a double-lumen indwelling needle, including a needle assembly 1, a diversion mechanism 2 is provided on the surface of the needle assembly 1, a drug injection mechanism 3 is provided on the surface of the diversion mechanism 2, an indwelling needle catheter 4 is provided on the surface of the diversion mechanism 2, the diversion mechanism 2 includes a tube 21, the tube 21 is movably mounted on the surface of the needle assembly 1, an isolation plug 22 is fixedly mounted inside the tube 21, a fixed block 23 is fixedly mounted on the surface of the isolation plug 22, the fixed block 23 is movably mounted on the surface of the needle assembly 1, the fixed block 23 and the tube 21 form a cavity, the surface of the tube 21 is fixedly mounted with a first drug connecting column 24, the first drug connecting column 2 4 is fixedly mounted with a connecting tube 27, one end of which is fixedly mounted on the surface of the indwelling needle catheter 4. The shunt mechanism 2 also includes a second drug connecting column 25, which is fixedly mounted on the surface of the tube body 21. One end of the second drug connecting column 25 is provided with a connecting hole 26, and the second drug connecting column 25 is adapted to the tube body 21. The indwelling needle catheter 4 includes a catheter body 41, which is fixedly mounted on the surface of the tube body 21. A catheter main cavity 42 is provided inside the catheter body 41, and the catheter main cavity 42 is circular. A catheter sub-cavity 43 is provided inside the catheter body 41, and the catheter sub-cavity 43 is set in a crescent shape.

[0029] In this embodiment, an isolation plug 22 is provided inside the tube body 21. When the puncture needle body 13 passes through the isolation plug 22, the fixing block 23 limits the puncture needle body 13 so that the puncture needle body 13 can accurately enter the main cavity 42 of the catheter. At the same time, the isolation plug 22 cooperates with the tube body 21 to form a cavity inside the tube body 21. The drug injected by the second drug connecting column 25 can enter the cavity formed by the isolation plug 22 and the tube body 21 through the connecting hole 26. When the puncture needle body 13 is pulled out, the drug can flow into the main cavity 42 of the catheter inside the catheter body 41 through the connecting hole 26 and be injected into the patient's body. When two different drugs need to be injected, the drugs enter the connecting tube 27 through the first drug connecting column 24. One end of the connecting tube 27 is interconnected with the catheter sub-cavity 43 so that the drugs enter the catheter sub-cavity 43 through the connecting tube 27 and are injected into the patient's body. The connecting tube 27 is isolated from the cavity inside the tube body 21 so that the drugs will not affect each other, thereby improving the adaptability of the device.

[0030] Example 2

[0031] like Figure 1-6 As shown, based on Example 1, the utility model provides a technical solution: preferably, the needle body assembly 1 includes a limiting fixing seat 12, the limiting fixing seat 12 is movably installed inside the tube body 21, the surface of the limiting fixing seat 12 is fixedly installed with a needle cap 11, the surface of the needle cap 11 is fixedly installed with a needle holding handle 14, the surface of the needle holding handle 14 is evenly distributed with anti-slip bumps, the surface of the limiting fixing seat 12 is fixedly installed with a puncture needle body 13, the puncture needle body 13 is movably installed inside the main cavity 42 of the catheter and extends to the outside of the main cavity 42 of the catheter.

[0032] In this embodiment, the puncture needle body 13 is limited by inserting the limiting fixing seat 12 into the tube body 21. After the puncture needle body 13 passes through the isolation plug 22, it can accurately locate the fixing block 23 and pass through it, preventing the puncture needle body 13 from being unable to pass through the fixing block 23 due to tilt. When the puncture needle body 13 needs to be pulled out after the puncture is completed, the user pinches the needle holding handle 14 on the surface of the needle cap 11 and pulls it. The anti-slip bumps on the surface of the needle holding handle 14 prevent the needle from slipping out of the hand during withdrawal. The needle holding handle 14 drives the limiting fixing seat 12. The length of the limiting fixing seat 12 allows the puncture needle body 13 to remain stable before leaving the patient's body, reducing pain caused by activity and improving the adaptability of the device.

[0033] Example 3

[0034] like Figure 1-6As shown, based on Example 1, the utility model provides a technical solution: preferably, the drug injection mechanism 3 includes a fixed seat 31, which is fixedly mounted on the surface of the first drug connecting column 24 and the second drug connecting column 25, and an extension tube 32 is fixedly mounted on the surface of the fixed seat 31, and a single-handed current limiting clamp 33 is movably mounted on the surface of the extension tube 32. The drug injection mechanism 3 also includes a three-way drug injection tube 34, which is fixedly mounted on one end of the extension tube 32, and a heparin cap 35 is movably mounted on the surface of the drug three-way injection tube 34.

[0035] In this embodiment, the first drug connecting column 24 and the second drug connecting column 25 are connected by a fixing seat 31, and a one-handed flow limiting clamp 33 is provided on the surface of the extension tube 32. When the flow rate of the drug needs to be controlled, the one-handed flow limiting clamp 33 squeezes the extension tube 32 to slow down the speed of drug injection. At the same time, one end of the drug three-way injection tube 34 is connected to the injection drug, and the other end is connected to the heparin cap 35, which can reduce blood reflux, prevent blockage, and improve the adaptability of the device.

[0036] The working principle of this double-lumen indwelling needle is described in detail below.

[0037] like Figure 1-6As shown, the first drug connecting column 24 and the second drug connecting column 25 are connected by the fixing seat 31, and a single-handed flow limiting clamp 33 is provided on the surface of the extension tube 32. When the flow rate of the drug needs to be controlled, the single-handed flow limiting clamp 33 squeezes the extension tube 32 to slow down the speed of drug injection. At the same time, one end of the drug three-way injection tube 34 is connected to the injection drug, and the other end is connected to the heparin cap 35, which can reduce blood backflow and prevent blockage. At the same time, the limiting fixing seat 12 is inserted into the tube body 21, so that the puncture needle body 13 is When the puncture needle body 13 passes through the isolation plug 22, it can accurately locate the fixing block 23 and pass through it, preventing the puncture needle body 13 from being unable to pass through the fixing block 23 due to tilt. When the puncture is completed and the puncture needle body 13 needs to be pulled out, the user pinches the needle holding handle 14 on the surface of the needle cap 11 and pulls it. The anti-slip bumps on the surface of the needle holding handle 14 prevent the hand from slipping when the needle is pulled out. The needle holding handle 14 drives the limiting fixing seat 12. The length of the limiting fixing seat 12 makes the puncture needle body 13 The device remains stable before leaving the patient's body to reduce pain caused by movement. An isolation plug 22 is provided inside the tube body 21. After the puncture needle body 13 passes through the isolation plug 22, the fixing block 23 limits the puncture needle body 13 so that the puncture needle body 13 can accurately enter the main cavity 42 of the catheter. At the same time, the isolation plug 22 cooperates with the tube body 21 to form a cavity inside the tube body 21. The drug injected by the second drug connecting column 25 can enter the cavity formed by the isolation plug 22 and the tube body 21 through the connecting hole 26. When the puncture needle body 13 is pulled out, the drug can flow into the main cavity 42 of the catheter inside the catheter body 41 through the connecting hole 26 and be injected into the patient's body. When two different drugs need to be injected, the drug enters the connecting tube 27 through the first drug connecting column 24. One end of the connecting tube 27 is connected to the catheter sub-cavity 43 so that the drug enters the catheter sub-cavity 43 through the connecting tube 27 and is injected into the patient's body. The isolation of the connecting tube 27 from the cavity inside the tube body 21 prevents the drugs from affecting each other, thereby improving the adaptability of the device.

[0038] The above generally describes the present invention in detail. However, it is obvious to those skilled in the art that modifications or improvements may be made to the present invention. Therefore, modifications or improvements that do not depart from the spirit of the present invention are within the scope of protection of the present invention.

Claims

1. A double-lumen indwelling needle, comprising a needle assembly (1), characterized in that: The surface of the needle assembly (1) is provided with a diversion mechanism (2), the surface of the diversion mechanism (2) is provided with a drug injection mechanism (3), and the surface of the diversion mechanism (2) is provided with an indwelling needle catheter (4); The diversion mechanism (2) comprises a tube body (21), the tube body (21) being movably mounted on the surface of the needle assembly (1), an isolation plug (22) being fixedly mounted inside the tube body (21), a fixed block (23) being fixedly mounted on the surface of the isolation plug (22), the fixed block (23) being movably mounted on the surface of the needle assembly (1), and the fixed block (23) and the tube body (21) forming a cavity.

2. A double-lumen indwelling needle according to claim 1, characterized in that: A first drug connection column (24) is fixedly mounted on the surface of the tube body (21), a connection tube (27) is fixedly mounted on the surface of the first drug connection column (24), and one end of the connection tube (27) is fixedly mounted on the surface of the indwelling needle catheter (4).

3. The double-lumen indwelling needle according to claim 1, characterized in that: The diversion mechanism (2) further comprises a second drug connecting column (25), which is fixedly mounted on the surface of the tube body (21), and a connecting hole (26) is provided at one end of the second drug connecting column (25), and the second drug connecting column (25) is adapted to the tube body (21).

4. The double-lumen indwelling needle according to claim 1, characterized in that: The indwelling needle catheter (4) comprises a catheter body (41), the catheter body (41) being fixedly mounted on the surface of the tube body (21), the interior of the catheter body (41) being provided with a catheter main cavity (42), the catheter main cavity (42) being circular, and the interior of the catheter body (41) being provided with a catheter sub-cavity (43), the catheter sub-cavity (43) being crescent-shaped.

5. The double-lumen indwelling needle according to claim 1, characterized in that: The needle assembly (1) includes a limiting fixing seat (12), the limiting fixing seat (12) is movably mounted inside the tube body (21), a needle cap (11) is fixedly mounted on the surface of the limiting fixing seat (12), a needle holding handle (14) is fixedly mounted on the surface of the needle cap (11), and anti-slip bumps are evenly distributed on the surface of the needle holding handle (14), a puncture needle body (13) is fixedly mounted on the surface of the limiting fixing seat (12), and the puncture needle body (13) is movably mounted inside the main cavity (42) of the catheter and extends to the outside of the main cavity (42) of the catheter.

6. The double-lumen indwelling needle according to claim 2, characterized in that: The drug injection mechanism (3) comprises a fixing seat (31), the fixing seat (31) being fixedly mounted on the surface of the first drug connecting column (24) and the second drug connecting column (25), an extension tube (32) being fixedly mounted on the surface of the fixing seat (31), and a single-handed current limiting clamp (33) being movably mounted on the surface of the extension tube (32).

7. The double-lumen indwelling needle according to claim 6, characterized in that: The drug injection mechanism (3) further comprises a three-way drug injection tube (34), wherein the three-way drug injection tube (34) is fixedly mounted on one end of the extension tube (32), and a heparin cap (35) is movably mounted on the surface of the three-way drug injection tube (34).

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