Sealing mechanism of remaining needle flushing device

Abstract

The utility model relates to the technical field of medical instruments, in particular to a sealing mechanism of an indwelling needle flushing device, which comprises an indwelling needle and a pre-filled catheter flusher, one end of the indwelling needle is provided with a heparin cap, the heparin cap is fixedly connected on the indwelling needle, the heparin cap is a hollow transparent pipeline, and the pre-filled catheter flusher is connected with the indwelling needle. According to the mechanism, after flushing and tube sealing are completed, in order to avoid contamination of an indwelling needle, medical staff can seal a heparin cap through the dual-purpose sealing plug taken down from the pre-filling type catheter flusher, the needle sealing function is achieved, cost is effectively reduced, and the situation that after the medical staff completes flushing and tube sealing, the heparin cap is sealed through the dual-purpose sealing plug is avoided. The needle sealing plug is forgotten to be carried independently.

Description

Technical Field

[0001] This utility model relates to the field of medical device technology, and in particular to a sealing mechanism for an indwelling needle flushing device. Background Technology

[0002] An indwelling catheter is an infusion device used for intravenous infusion. It is suitable for patients who require long-term, continuous, or intermittent infusions. Clinically, it is used to reduce the number of venipunctures, thereby reducing patient pain. After an infusion is completed, a flushing solution and a flushing syringe are prepared. The flushing solution is drawn into the flushing syringe, and then the injection end of the flushing syringe is connected to the indwelling catheter port. The medical staff then intermittently presses the plunger of the flushing syringe to push the flushing solution into the indwelling catheter, thereby achieving flushing and sealing of the indwelling catheter.

[0003] After flushing the indwelling needle and removing the flushing device, if the indwelling needle port is directly exposed to the air, it is highly susceptible to contamination by bacteria and dust, which can harm the patient during subsequent intravenous infusions. Therefore, currently, medical staff need to carry a sealing plug to seal the indwelling needle after insertion and flushing. However, the sealing plug is small and easily overlooked, leading to medical staff forgetting to bring it, thus causing inconvenience for needle insertion and flushing. To address this, we propose a sealing mechanism for the indwelling needle flushing device. Utility Model Content

[0004] To address the aforementioned problems, this invention proposes a sealing mechanism for an indwelling needle flushing device, which more accurately solves the problems described above.

[0005] This utility model is achieved through the following technical solution:

[0006] This utility model proposes a sealing mechanism for an indwelling needle flushing device, including an indwelling needle and a pre-filled catheter flusher. One end of the indwelling needle is provided with a heparin cap, which is fixedly connected to the indwelling needle. The heparin cap is a hollow transparent tube. The needle tip of the pre-filled catheter flusher is plugged with a dual-purpose sealing plug.

[0007] Furthermore, the pre-filled catheter flusher is a needleless flusher.

[0008] Furthermore, the dual-purpose sealing plug is made of natural rubber, synthetic rubber or plastic, with one end being concave and having internal threads and containing a sterile cotton ball, and the other end being convex with external threads and a hollow structure in the middle.

[0009] Furthermore, the internal thread of the recessed end of the dual-purpose sealing plug is equivalent to the external thread specification of the heparin cap.

[0010] Furthermore, the pre-filled catheter flusher is replaced with an injection flusher. The injection end of the injection flusher is equipped with a needle tube, and the needle tube is covered with a double-pass sealing plug. The other end of the double-pass sealing plug is covered with a rubber sleeve. The double-pass sealing plug has a fixing block inside, and the fixing block has holes that pass through the left and right sides. The needle tube passes through the holes of the fixing block inside the double-pass sealing plug and extends into the rubber sleeve at the other end.

[0011] Furthermore, the double-pass sealing plug is made of natural rubber or synthetic rubber and has a double-pass hollow structure.

[0012] Furthermore, the end of the injection-type flushing device is connected to a needle tube.

[0013] Furthermore, the rubber sleeve is made of natural rubber or synthetic rubber, and the specifications of the rubber sleeve are equivalent to those of the left and right ports of the double-pass sealing plug.

[0014] The beneficial effects of this utility model are:

[0015] 1. The present invention proposes a sealing mechanism for an indwelling needle flushing device. After flushing, in order to prevent external bacteria and dust from entering the indwelling needle, medical staff can tear off the sealing aluminum film of the dual-purpose sealing plug and tighten the concave end with the heparin cap through the thread. The dual-purpose sealing plug carried by the pre-filled catheter flushing device can realize the functions of sealing the needle and disinfecting, effectively reducing costs and preventing medical staff from forgetting to carry the sealing plug separately when inserting needles into patients.

[0016] 2. In the second embodiment of the sealing mechanism of the indwelling needle flushing device proposed in this utility model, after flushing is completed, the injection flushing device is pulled out, leaving the flushing tube on the heparin cap. To prevent external bacteria and dust from entering the indwelling needle, medical staff can plug the other end of the flushing tube with a rubber sleeve. After the medical staff administers intravenous infusion to the patient, the indwelling needle is flushed again with the flushing device. This avoids repeatedly pulling out the needle and causing damage to the puncture diaphragm of the indwelling needle by repeated insertion and removal, which would affect the service life of the entire indwelling needle. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the structure of the indwelling needle according to Embodiment 1 of this utility model;

[0018] Figure 2 This is a schematic diagram of the structure of the flushing device according to Embodiment 1 of this utility model;

[0019] Figure 3 This is a schematic diagram of the sealing plug according to Embodiment 1 of this utility model;

[0020] Figure 4 This is a schematic diagram of the internal structure of the sealing plug according to Embodiment 1 of this utility model;

[0021] Figure 5 This is a schematic diagram of the overall structure of Embodiment 2 of this utility model;

[0022] Figure 6 This is a schematic diagram of the structure of the injection irrigation device according to Embodiment 2 of this utility model;

[0023] Figure 7 This utility model Figure 6 Enlarged schematic diagram of the structure at point A in the middle.

[0024] The attached figures are labeled as follows:

[0025] 1. Indwelling needle; 2. Heparin cap; 3. Pre-filled catheter flushing device; 4. Dual-purpose sealing plug; 5. Dual-port sealing plug; 6. Needle; 7. Rubber sleeve; 8. Injection flushing device. Detailed Implementation

[0026] To more clearly and completely illustrate the technical solution of this utility model, the following description, in conjunction with the accompanying drawings, will further explain this utility model.

[0027] Example 1, please refer to Figures 1-4 This utility model proposes a sealing mechanism for an indwelling needle flushing device, including an indwelling needle 1 and a pre-filled catheter flusher 3. One end of the indwelling needle 1 is provided with a heparin cap 2, which is fixedly connected to the indwelling needle 1. The heparin cap 2 is a hollow transparent tube, mainly composed of a puncture diaphragm made of rubber or silicone and a connecting part. The puncture diaphragm is a key part of the heparin cap 2, and is usually relatively soft and elastic, allowing for puncture by the needle of a syringe or infusion device. It also maintains a sealed state after puncture, preventing fluid leakage and the intrusion of external microorganisms. The connecting part is used to tightly connect with the indwelling needle 1, ensuring the stability of the entire pathway. The pre-filled catheter flusher 3 is a needleless flusher, and a dual-purpose seal is plugged at the needle end of the pre-filled catheter flusher 3. The plug 4, a dual-purpose sealing plug 4, is usually made of natural rubber, synthetic rubber, or plastic. One end of the dual-purpose sealing plug 4 is a hollow, threaded recess with threads inside that are equivalent to the specifications of the heparin cap 2. Normally, an aluminum foil sealing paper is pasted on the outside of the recess, and a sterile cotton ball for disinfection is placed inside. The other end is fixedly connected to a sealing post of equivalent specifications to the pre-filled catheter flusher 3. The sealing post has threads and a hollow structure. Normally, it is threadedly connected to the infusion end of the pre-filled catheter flusher 3 to prevent external bacteria and dust from entering the pre-filled catheter flusher 3 and contaminating it, thus affecting the flushing of the indwelling needle 1. When the injection end of the pre-filled catheter flusher 3 contains a needle, the hollow structure can seal and protect the needle.

[0028] Before administering an IV to a patient, medical staff remove the dual-purpose sealing plug 4 from the pre-filled catheter flushing device 3 and thread the pre-filled catheter flushing device 3 into the heparin cap 2. The heparin cap 2 covers the needle tip of the pre-filled catheter flushing device 3. Medical staff can push the piston rod of the pre-filled catheter flushing device 3 to push the flushing fluid in the pre-filled catheter flushing device 3 into the indwelling needle 1 through the heparin cap 2 to flush and clean the indwelling needle 1.

[0029] Afterwards, the medical staff inserted the infusion needle into the heparin cap 2 to puncture the diaphragm and administer the infusion to the patient. After the infusion was completed, the indwelling needle 1 also needed to be flushed, especially after infusing some irritating or highly viscous drugs, as these drugs are prone to adhering to the wall of the indwelling needle 1. If not flushed in time, it may cause blockage of the indwelling needle 1 or irritate the blood vessels.

[0030] After flushing and sealing the catheter, in order to ensure the sterility of the heparin cap 2 of the indwelling needle 1, the medical staff peeled off the outer sealing aluminum film paper of the concave end of the dual-purpose sealing plug 4, and tightened the inner thread of the concave end with the outer thread of the heparin cap 2 to seal it. The concave end seals the thread of the heparin cap 2. The dual-purpose sealing plug 4 on the pre-filled catheter flusher 3 can realize the function of sealing the needle, effectively reducing costs and preventing medical staff from forgetting to bring the sealing plug when inserting needles into patients.

[0031] Example 2: This example improves upon Example 1 by modifying the sealing plug, referring to... Figures 5-7 This embodiment includes an injection-type flushing device 8. The syringe 6 at the injection end of the injection-type flushing device 8 is covered with a double-pass sealing plug 5. The double-pass sealing plug 5 is used as a sealing plug. A channel running through the left and right sides is opened in the center of the double-pass sealing plug 5. A rubber sleeve 7 is fitted on the other end of the double-pass sealing plug 5. A fixing block is provided inside the double-pass sealing plug 5. A hole running through the left and right sides is opened on the fixing block to facilitate the insertion of the syringe 6 into the hole for fixation. The syringe 6 passes through the hole of the fixing block inside the double-pass sealing plug and extends into the rubber sleeve at the other end. Normally, the rubber sleeve 7 is located at one end of the flushing device to prevent external bacteria and dust from entering the injection-type flushing device 8 and contaminating the injection-type flushing device 8, thereby affecting the flushing of the indwelling needle 1.

[0032] Before administering an IV to a patient, medical staff remove the rubber sleeve 7 from the syringe flushing device 8, insert the needle 6 into the puncture septum inside the heparin cap 2, and cover the exposed needle tip of the syringe flushing device 8 with the heparin cap 2. The medical staff pushes the piston rod of the syringe flushing device 8 to allow the flushing fluid in the syringe flushing device 8 to enter the heparin cap 2 through the needle 6, and then inject it into the indwelling needle 1 through the heparin cap 2 to flush and clean the indwelling needle 1.

[0033] After rinsing, remove the syringe flushing device 8, leaving the sealing mechanism on the heparin cap 2 and the needle tube 6. To prevent external bacteria and dust from entering the indwelling needle 1, medical staff can put a rubber sleeve 7 on the end with the needle tube 6. After the medical staff has finished administering the infusion to the patient, the indwelling needle 1 can be rinsed again with the flushing device. The remaining needle tube 6 can be used directly for subsequent medication administration to the patient. When it is not necessary to use the needle tube 6 to administer medication to the patient or to avoid drug interactions after multiple administrations, the medical staff can use the double-pass sealing plug 5 to pull out the internal needle tube 6 for disposal. Then, put the rubber sleeve 7 on the end of the double-pass sealing plug 5 to prevent external bacteria and dust from entering the device. This embodiment avoids repeatedly inserting and removing the needle tube 6, which could damage the puncture diaphragm of the indwelling needle 1 and affect its overall service life.

[0034] Of course, there may be other implementations of this utility model. Based on this implementation, other implementations obtained by those skilled in the art without any creative effort are all within the scope of protection of this utility model.

Claims

1. A sealing mechanism for an indwelling needle flushing device, comprising an indwelling needle (1) and a pre-filled catheter flushing device (3), characterized in that: The indwelling needle (1) is provided with a heparin cap (2) at one end. The heparin cap (2) is fixedly connected to the indwelling needle (1). The heparin cap (2) is a hollow transparent tube. The needle tip of the pre-filled catheter flushing device (3) is plugged with a dual-purpose sealing plug (4).

2. The sealing mechanism of the indwelling needle flushing device according to claim 1, characterized in that: The pre-filled catheter flusher (3) is a needleless flusher.

3. The sealing mechanism of the indwelling needle flushing device according to claim 1, characterized in that: The dual-purpose sealing plug (4) is made of natural rubber, synthetic rubber or plastic. One end is concave with internal threads and contains a sterile cotton ball. The other end is convex with external threads and a hollow structure in the middle.

4. The sealing mechanism of the indwelling needle flushing device according to claim 1, characterized in that: The internal thread of the recessed end of the dual-purpose sealing plug (4) is equivalent to the external thread specification of the heparin cap (2).

5. The sealing mechanism of the indwelling needle flushing device according to claim 1, characterized in that: Replace the pre-filled catheter flusher (3) with an injection flusher (8). The injection end of the injection flusher (8) is equipped with a needle (6). The needle (6) is covered with a double-pass sealing plug (5). The other end of the double-pass sealing plug (5) is covered with a rubber sleeve (7). The double-pass sealing plug (5) has a fixing block inside. The fixing block has holes that pass through the left and right sides. The needle (6) passes through the hole of the fixing block inside the double-pass sealing plug (5) and extends into the rubber sleeve (7) at the other end.

6. The sealing mechanism of the indwelling needle flushing device according to claim 5, characterized in that: The double-pass sealing plug (5) is made of natural rubber or synthetic rubber and has a double-pass hollow structure.

7. The sealing mechanism of the indwelling needle flushing device according to claim 5, characterized in that: The end of the injection irrigator (8) is connected to the needle tube (6).

8. The sealing mechanism of the indwelling needle flushing device according to claim 5, characterized in that: The rubber sleeve (7) is made of natural rubber or synthetic rubber, and the specifications of the left and right ports of the rubber sleeve (7) are equivalent to those of the double-pass sealing plug (5).

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