Safe blood sampling type remaining needle

Abstract

The utility model discloses a safe blood sampling type indwelling needle, which relates to the technical field of medical instruments, and comprises a blood sampling block and an indwelling block, a needle handle is obliquely provided with an indwelling interface, the indwelling interface is connected with an indwelling hose, the needle handle is provided with a main body part and a shell which are movable end to end, and the side surface of the main body part is provided with an elastic buckle structure for limiting. The side face of the shell extends to form an inverted buckle block matched with the buckle structure, the variable-diameter sleeve is arranged outside the puncture needle tube in a sleeving mode and connected to the shell, a sealing interlayer is arranged above the indwelling connector in the shell, and the puncture needle tube and the sealing interlayer are tightly arranged. The technical problem to be solved by the utility model is to provide the safe blood sampling type indwelling needle, a channel in a blood sampling function cannot be communicated with an infusion channel of the indwelling needle, the thrombus risk after blood flows to an infusion pipeline is reduced, the puncture risk and the blood splashing risk caused by tube replacement in the blood sampling process of medical personnel are reduced, and the safety of the medical personnel is improved. And the buckle structure forms safe path limiting, so that the safety is improved.

Description

Technical Field

[0001] This utility model relates to the field of medical device technology, specifically to a safe blood collection indwelling needle. Background Technology

[0002] An indwelling catheter, also known as a venous catheter or peripheral venous catheter, is a small plastic catheter used in medical care. It is inserted into a patient's peripheral vein, allowing healthcare professionals to draw blood samples, administer intravenous fluids, and administer medications multiple times as needed without having to re-puncture the vein for each procedure. However, ordinary indwelling catheters cannot draw blood directly; a second puncture is required after blood collection for intravenous infusion. Furthermore, ordinary blood collection needles draw blood by piercing the patient's blood vessel with a stainless steel needle, which carries the risk of perforation. Some indwelling catheters also have blood collection capabilities, but these cannot avoid the problem of communication between the blood collection and infusion pathways, which can easily lead to thrombosis. Utility Model Content

[0003] Technical problem to be solved by the utility model

[0004] The technical problem to be solved by this utility model is to provide a safe blood collection indwelling needle. The blood collection function is not connected to the infusion channel of the indwelling needle itself, which reduces the risk of thrombosis after the blood flows into the infusion line, reduces the risk of needle sticking and blood splashing for medical staff during blood collection, and the snap-fit ​​structure forms a safe path limit to improve safety.

[0005] Technical solution

[0006] To solve the above problems, the technical solution provided by this utility model is as follows:

[0007] A safe blood collection indwelling needle includes a blood collection area and an indwelling area. The blood collection area has a blood collection tip, a blood collection tubing, a needle handle, a reducing sleeve, and a puncture needle tube connected in sequence. The needle handle has an indwelling interface at an angle, which is connected to the indwelling tubing. The needle handle has a main body and a housing that are movable end to end. The side of the main body has an elastic snap-fit ​​structure for limiting the position. The side of the housing extends a buckle block that cooperates with the snap-fit ​​structure. The reducing sleeve is fitted over the puncture needle tube and connected to the housing. A sealing jacket is provided above the indwelling interface inside the housing. The puncture needle tube is tightly fitted with the sealing jacket.

[0008] This indwelling needle features an independent blood collection area, ensuring that the blood collection pathway does not connect with the infusion pathway of the needle itself. This effectively avoids the risk of thrombosis that may occur if blood enters the infusion line. The puncture needle tube and handle are fixedly connected. After insertion into the body, once sensitive blood return is observed, medical staff can move the handle upwards, creating a movement path through the locking mechanism. At this time, the reducing cannula still seals the outer periphery of the needle tube, preventing blood from entering the indwelling area pathway through the cannula. Simultaneously, the needle tip retracts into the cannula, preventing secondary damage to the blood vessel. After blood collection, the handle can be pulled back or forward to disengage it from the locking mechanism. A sealing jacket is located above the indwelling interface, and the puncture needle tube is tightly fitted with the sealing jacket, ensuring a tight seal during blood collection or infusion, preventing fluid leakage, and also helping to maintain a sterile environment. The puncture needle tube can then be withdrawn, the sealing jacket automatically closes, and the reducing cannula is now connected to the indwelling needle line.

[0009] Reduced risk of needle sticks and blood splatter during tube replacement: This reduces the number of tube replacements required by healthcare workers during blood collection, thereby lowering the risk of needle sticks and blood splatter during the procedure.

[0010] Safety path limiting with snap-fit ​​structure: The safety path limiting formed by the snap-fit ​​structure improves the safety of equipment use. Specifically, the end-to-end movable design between the main body and the shell, combined with the side snap-fit ​​structure and inverted blocks, ensures that each component can be stably kept in the correct position during blood collection or infusion, preventing accidental movement or detachment.

[0011] Optionally, the blood collection terminal includes a needle holder, a blood collection needle hub, a connector, a blood collection needle tube, and a silicone needle sleeve. The blood collection needle tube is fixed to the blood collection needle hub, the bottom of the blood collection needle hub is Luer-slidably connected to the connector, and a silicone needle sleeve is provided on the outside of the blood collection needle tube.

[0012] The needle holder is the part held by medical staff. A silicone needle sheath covers the outside of the blood collection needle, providing protection and effectively protecting the needle before and after blood collection to prevent accidental punctures. The bottom of the needle holder and the connector use a Luer sliding connection, which not only ensures a tight and airtight connection but also allows for quick and easy assembly and disassembly. Luer connections are available in two types: sliding and locking.

[0013] Optionally, the top of the blood collection needle hub is Luer-locked to the needle holder.

[0014] The Luer locking connection ensures a tight connection between the needle holder and the needle carrier through a threaded tightening mechanism, preventing loosening even under external force during operation. The Luer locking connection provides excellent sealing between the needle holder and the needle carrier, effectively preventing leakage of blood or other liquids, maintaining a sterile environment, and reducing the risk of infection.

[0015] Optionally, the top of the blood collection needle hub is Luer-slidably connected to the needle holder.

[0016] The biggest advantage of the Luer sliding connection is its ease and speed of operation. Healthcare professionals simply insert the needle holder gently into the top of the lancet hub to complete the connection; to disconnect, simply pull it out. This is extremely useful in situations requiring rapid response or frequent changes to the lancet assembly.

[0017] Optionally, the main body is provided with a needle tip protection mechanism inside.

[0018] A needle tip protection mechanism seals the needle tip after it is removed from the syringe. By effectively protecting the needle tip, it reduces the chance of the needle tip coming into contact with the external environment, lowers the risk of transmission of contaminants such as blood and bodily fluids, and protects the health of healthcare workers and other patients.

[0019] Optionally, the top of the main body is provided with a connecting end, which is bonded to the blood collection tubing.

[0020] By using appropriate medical-grade adhesives, a strong bond can be achieved between the connecting end of the main body and the blood collection tubing. This connection method provides sufficient mechanical strength to prevent loosening or separation during use. The adhesive connection forms a completely sealed interface, effectively preventing leakage of blood or other fluids from the connection point, maintaining a sterile environment, and reducing the risk of infection. This is crucial for the safety and effectiveness of blood collection procedures.

[0021] Optionally, the end of the reducing sleeve is tapered.

[0022] The finer tip allows for a tighter fit with the puncture needle, creating a good seal and preventing blood leakage. Even after the puncture needle is withdrawn from the reducing cannula, the reducing cannula still seals the outer periphery of the needle, preventing blood from flowing through the cannula into the indwelling needle pathway.

[0023] Optionally, both the blood collection tubing and the indwelling tubing are equipped with flow-stopping clips.

[0024] A flow-stop clamp precisely controls the flow of fluid in blood collection tubing and indwelling catheters. After blood collection, closing the flow-stop clamp on the blood collection tubing prevents blood from flowing back into the needle or indwelling catheter, reducing the risk of thrombosis. Similarly, during intravenous infusion, if it is necessary to temporarily interrupt the infusion, closing the flow-stop clamp on the indwelling catheter prevents fluid from continuing to flow into the patient's body.

[0025] Beneficial effects

[0026] Compared with the prior art, the technical solution provided by this utility model has the following advantages:

[0027] In the technical solution provided by this utility model, the blood collection function pathway is not connected to the infusion pathway of the indwelling needle itself, reducing the risk of thrombosis after blood flows into the infusion tubing; the protruding end of the blood collection block has a needle holder, thereby achieving the first level of protection and reducing the risk of needle stick injuries and blood splashing for medical personnel during blood collection; the structure of the protruding needle handle of the indwelling needle block allows the top to be fixedly connected to the blood collection block pathway, and the needle handle and the shell have a locking mechanism; the variable diameter cannula ensures that the blood collection pathway and the infusion pathway are not interconnected, preventing secondary damage to blood vessels; and the needle tip protection mechanism seals the needle tip after the needle is removed. Attached Figure Description

[0028] Figure 1 A schematic diagram of the structure of a safe blood collection indwelling needle proposed for an embodiment of this utility model;

[0029] Figure 2 A cross-sectional view of the blood collection tip of a safe blood collection indwelling needle proposed for an embodiment of this utility model;

[0030] Figure 3 A cross-sectional view of the handle of a safe blood collection indwelling needle proposed for an embodiment of this utility model;

[0031] 1. Blood collection area; 2. Indwelling area; 3. Blood collection tip; 301. Needle holder; 302. Blood collection needle hub; 303. Connector; 304. Blood collection needle tube; 305. Silicone needle sheath; 4. Flow stop clamp; 5. Blood collection tubing; 6. Needle handle; 601. Handle; 602. Snap-fit ​​structure; 603. Connecting end; 604. Main body; 605. Needle tip protection mechanism; 606. Sealing interlayer; 7. Shell; 701. Inverted buckle block; 8. Reducing sleeve; 9. Puncture needle tube; 10. Indwelling tubing; 11. Indwelling tip; 12. Indwelling interface. Detailed Implementation

[0032] To further understand the content of this utility model, a detailed description of this utility model will be provided in conjunction with the accompanying drawings and embodiments.

[0033] Example

[0034] Combined with appendix Figure 1-3 A safe blood collection indwelling needle includes a blood collection section 1 and an indwelling section 2. The blood collection section 1 has a blood collection tip 3, a blood collection tubing 5, a needle handle 6, a reducing sleeve 8, and a puncture needle tube 9 connected in sequence. The needle handle 6 has an indwelling interface 12 obliquely provided, which is connected to the indwelling tubing 10. The other end of the indwelling tubing 10 is connected to an indwelling tip 11. Both the blood collection tubing 5 and the indwelling tubing 10 are equipped with flow-stopping clips 4. The indwelling interface 12 and the snap-fit ​​structure 602 are respectively located on both sides of the needle handle 6.

[0035] The needle handle 6 has an end-to-end movable main body 604 and a housing 7. The side of the main body 604 has a handle 601, which is an arc-shaped elastic piece that can be moved back and forth. The side of the main body 604 has an elastic locking structure 602 for limiting movement. The side of the housing 7 extends a reversed block 701 that cooperates with the locking structure 602. The handle 601 has the locking structure 602 inside, which can be disengaged from the reversed block 701 after being moved, thus detaching from the main body 604. A reducing sleeve 8 is fitted over the puncture needle tube 9 and connected to the housing 7. A sealing interlayer 606 is provided above the inlet 12 inside the housing 7. The puncture needle tube 9 and the sealing interlayer 606 are tightly fitted together. The sealing interlayer 606 is an elastic block made of rubber with a cross groove in the middle. After the puncture needle tube 9 is withdrawn, the cross groove closes, providing a seal.

[0036] Combined with appendix Figure 2 The blood collection terminal 3 includes a needle holder 301, a blood collection needle base 302, a connector 303, a blood collection needle tube 304, and a silicone needle sleeve 305. The blood collection needle tube 304 is fixed to the blood collection needle base 302, and the bottom of the blood collection needle base 302 is Luer-slidably connected to the connector 303. The blood collection needle tube 304 is covered with a silicone needle sleeve 305. The needle holder 301 is conical in shape. Figure 2 The blood collection needle holder 302 is connected to the bottom of the middle thread. The blood collection needle tube 304 is inserted into the through hole of the blood collection needle holder 302, and a silicone needle sleeve 305 is provided on the end of the blood collection needle tube 304.

[0037] The top of the blood collection needle hub 302 is Luer locked or Luer sliding connected to the needle holder 301.

[0038] The main body 604 has a needle tip protection mechanism 605 inside. The needle tip protection mechanism 605 is slidably disposed on the outer periphery of the puncture needle tube 9 and located in the housing 7 between the needle handle 6 and the sealing interlayer 606, and includes a protective shell and an elastic steel sheet.

[0039] The top of the main body 604 is provided with a connecting end 603, which is bonded to the blood collection tubing 5.

[0040] The reducing sleeve 8 has a tapered end. The reducing sleeve 8 gradually transitions from a thicker end to a thinner end, ensuring a smooth and stable connection. The reducing sleeve 8 is made of medical-grade plastics (such as polyvinyl chloride (PVC), polyurethane (PU), etc.), which have good flexibility, biocompatibility, and chemical resistance, providing sufficient strength and durability without compromising performance.

[0041] Working principle:

[0042] Puncture stage:

[0043] Initial state: Before puncture, the needle handle 6 and the housing 7 are tightly connected by a snap-fit ​​mechanism to ensure the stability and sealing of the entire device.

[0044] Puncture procedure: Medical staff insert the puncture needle 9 into the patient's blood vessel until sensitive blood return is seen, confirming successful puncture.

[0045] Needle handle 6 upward movement stage:

[0046] First-stage movement: Once sensitive blood return is observed, the medical staff gently moves the needle handle 6 upwards, causing it to move along the first-stage movement path of the locking mechanism. At this time, the reducing cannula 8 continues to seal the outer periphery of the needle, preventing blood from entering the indwelling needle pathway through the cannula.

[0047] Needle tip protection: As the needle handle 6 moves upward, the needle tip gradually retracts into the reducing cannula 8, avoiding secondary damage to the blood vessel. This design ensures the safety and accuracy of the puncture procedure.

[0048] Blood collection stage:

[0049] Blood collection procedure: After the needle handle 6 is lowered into place, medical staff can begin the blood collection procedure. Because the reducing cannula 8 seals the outer periphery of the needle, blood only flows out through the blood collection tubing 5 and will not enter the indwelling needle pathway.

[0050] Blood flow control: The flow stop clamp 4 on the blood collection tubing 5 can control the blood flow at any time, ensuring the safety and controllability of the blood collection process.

[0051] After blood collection:

[0052] Disengaging from the locking mechanism: After blood collection, medical staff can disengage the locking mechanism by pulling the handle 601 backward or forward. At this time, the reducing cannula 8 can still seal the outer periphery of the needle, preventing blood from entering the indwelling needle passage through the cannula. At the same time, the needle tip will retract into the cannula, preventing secondary damage to the blood vessel. The sealing jacket 606 automatically closes to prevent blood leakage.

[0053] Connecting the cannula and the indwelling needle line: After the handle 601 is completely disengaged from the locking mechanism, the reducing cannula 8 is connected to the indwelling needle line, preparing for subsequent infusion or other treatment operations.

[0054] Follow-up operations:

[0055] Infusion or treatment: After the reducing cannula 8 is connected to the indwelling needle tubing, medical staff can perform infusion, medication administration, and other procedures as needed. Throughout the process, the sealing jacket 606 and the locking mechanism ensure the safety and stability of the system.

[0056] The present invention and its embodiments have been described above illustratively. This description is not restrictive, and the figures shown are only one embodiment of the present invention; the actual structure is not limited thereto. Therefore, if those skilled in the art are inspired by this description and design similar structures and embodiments without departing from the inventive spirit of the present invention, such designs should fall within the protection scope of the present invention.

Claims

1. A safety blood sampling type of indwelling needle, characterized by comprising: The device includes a blood collection area and an indwelling area. The blood collection area is provided with a blood collection tip, a blood collection tube, a needle handle, a reducing sleeve, and a puncture needle connected in sequence. The needle handle has an indwelling interface at an angle, which is connected to the indwelling tube. The needle handle has a main body and a housing that are movable end to end. The side of the main body has an elastic buckle structure for limiting the position. The side of the housing extends with an undercut block that cooperates with the buckle structure. The reducing sleeve is fitted over the puncture needle and connected to the housing. A sealing jacket is provided above the indwelling interface inside the housing. The puncture needle is tightly fitted with the sealing jacket.

2. The safety blood sampling type of indwelling needle according to claim 1, wherein The blood collection terminal includes a needle holder, a blood collection needle base, a connector, a blood collection needle tube, and a silicone needle sleeve. The blood collection needle tube is fixed to the blood collection needle base, and the bottom of the blood collection needle base is Luer-slidably connected to the connector. A silicone needle sleeve is provided on the outside of the blood collection needle tube.

3. The safety blood sampling type of catheter needle according to claim 2, wherein The top of the blood collection needle hub is Luer locked to the needle holder.

4. The safety blood sampling type catheter needle according to claim 2, wherein The top of the blood collection needle hub is Luer-slidably connected to the needle holder.

5. The safety blood sampling type catheter needle according to claim 1, wherein The main body is equipped with a needle tip protection mechanism inside.

6. The safety blood sampling type catheter needle according to claim 1, wherein The top of the main body is provided with a connecting end, which is bonded to the blood collection tubing.

7. The safety blood sampling type catheter needle according to claim 1, wherein The end of the variable diameter sleeve is a thin section.

8. A safety blood sampling type catheter needle according to any one of claims 1 to 7, characterized in that Both the blood collection tubing and the indwelling tubing are equipped with flow-stopping clips.

Images