Remaining needle for vacuum blood sampling

Abstract

The utility model discloses a remaining needle for vacuum blood sampling, and relates to the technical field of medical instruments. One end of the side wall of the transparent tee joint is fixedly connected with a catheter, the end, away from the transparent tee joint, of the catheter is fixedly connected with an infusion tube, the end, away from the catheter, of the infusion tube is provided with a positive pressure connector, and the side wall of the infusion tube is fixedly connected with a blood sampling connecting tube. One end of the blood collection connecting tube away from the infusion tube is provided with a blood collection assembly. During blood sampling operation, the sealing cover is opened, the blood sampling leading-out intubation tube is inserted into an external negative pressure blood sampling tube, then the water stopping clamp is opened, the blood sampling operation can be carried out, the water stopping clamp is closed after blood sampling is completed, and when the blood sampling assembly needs to be replaced or taken down, the blood sampling assembly is directly pulled out. Meanwhile, the medical cost is reduced, the medical waste is reduced, and the workload of medical staff is reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of medical equipment, in particular to an indwelling needle for vacuum blood collection. Background Art

[0002] An indwelling needle is an infusion tool that is made of soft material and can be left in the blood vessel for a long time without damaging the blood vessel.

[0003] The use of intravenous catheters can reduce the pain caused by repeated intravenous punctures in children and their fear of injections, reduce the anxiety of parents, facilitate clinical medication, emergency medication for critically ill patients, and reduce the workload of nurses. Therefore, intravenous catheters are widely used in clinical practice.

[0004] Existing intravenous catheters are only used for infusion after insertion. When blood tests are needed on patients, additional blood vessel puncture is often required. However, some patients who need blood tests at irregular intervals require multiple blood vessel punctures, which can cause great pain to the patients, especially for patients with poor vascular conditions. Each blood draw can cause damage to the blood vessels. Repeated blood draws not only increase the workload of medical staff, but also generate a lot of medical waste. Therefore, the present application proposes a vacuum blood collection catheter to solve the above problems. Utility Model Content

[0005] The utility model aims to provide a vacuum-capable indwelling needle for blood sampling, which solves the technical problems raised in the background technology.

[0006] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a vacuum-capable indwelling needle for blood sampling, comprising a transparent tee, a lower port of the transparent tee connected to an indwelling needle tube, the indwelling needle tube adopts a soft tube, the upper end of the transparent tee is provided with a supporting steel needle assembly, the lower end of the supporting steel needle assembly extends into the indwelling needle tube, one end of the side wall of the transparent tee is fixedly connected to a liquid guide tube, the liquid guide tube is communicated with the transparent tee, the end of the liquid guide tube away from the transparent tee is fixedly connected to an infusion tube, the end of the infusion tube away from the liquid guide tube is provided with a positive pressure joint, the side wall of the infusion tube is fixedly connected to a blood sampling connecting tube, the end of the blood sampling connecting tube away from the liquid guide tube is fixedly connected to an externally threaded barrel, the externally threaded barrel is communicated with the blood sampling connecting tube, the side of the externally threaded barrel away from the blood sampling connecting tube is provided with a blood sampling assembly, and a negative pressure blood sampling tube is provided outside the blood sampling assembly;

[0007] The blood sampling assembly comprises a connecting piece, one end of which is fixedly connected to a blood sampling steel needle, the other end of which is fixedly connected to a blood sampling outlet cannula, the blood sampling outlet cannula is communicated with the blood sampling steel needle, an isolation rubber plug is arranged on the inner side of the externally threaded barrel, the end of the blood sampling steel needle close to the externally threaded barrel passes through the isolation rubber plug and extends into the blood sampling connecting tube;

[0008] A sealing cover is provided at one end of the blood sampling outlet cannula away from the blood sampling steel needle, the blood sampling outlet cannula is located on the inner side of the sealing cover, and the sealing cover is threadedly connected to the connecting piece;

[0009] A protective internal threaded end cap is disposed on the outside of the external threaded barrel, and the external threaded barrel is threadedly connected to the protective internal threaded end cap;

[0010] The liquid guiding tube is provided with a water stop clamp.

[0011] Compared with the related art, the vacuum blood collection indwelling needle provided by the utility model has the following beneficial effects:

[0012] The utility model provides an indwelling needle for vacuum blood collection. In the device, a blood collection component is arranged on a blood collection connecting tube. The arrangement of the blood collection component enables the device to realize blood collection operation through a liquid guide tube and an indwelling needle tube. During the specific blood collection operation, the sealing cover is opened, and the blood collection lead-out cannula is inserted into an external negative pressure blood collection tube, and then the water stop clamp is opened to carry out the blood collection operation. After the blood collection is completed, the water stop clamp can be closed. When the blood collection component needs to be replaced or removed, the blood collection component can be directly pulled out. At the same time, the isolation rubber plug position can be sealed and protected by cooperating with the protective internal threaded end cover and the external threaded barrel. The device arranges the blood collection device on the indwelling needle, which greatly reduces the puncture of the patient's blood vessels and reduces the damage to the blood vessels, while reducing medical costs, reducing medical waste, and reducing the workload of medical staff. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 It is a three-dimensional structural schematic diagram of the utility model;

[0014] Figure 2 It is a partial three-dimensional structural schematic diagram of the utility model;

[0015] Figure 3 It is a schematic diagram of the three-dimensional structure of the blood sampling component of the utility model.

[0016] In the figure: 1. Transparent tee; 2. Indwelling needle tube; 3. Support steel needle assembly; 4. Catheter tube; 5. Water stop clamp; 6. Infusion tube; 7. Blood collection connecting tube; 8. Blood collection assembly; 801. Connector; 802. Blood collection steel needle; 803. Blood collection lead-out cannula; 804. Sealing cap; 9. Positive pressure connector; 10. Externally threaded barrel; 11. Isolation rubber plug; 12. Protective internally threaded end cap. DETAILED DESCRIPTION

[0017] The technical solutions in the embodiments of the utility model will be clearly and completely described below in conjunction with 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 of the embodiments; based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the utility model.

[0018] See also Figure 1-3 The utility model provides a technical solution: a vacuum indwelling needle for blood sampling, comprising a transparent tee 1, a lower port of the transparent tee 1 is connected with an indwelling needle tube 2, the indwelling needle tube 2 adopts a soft tube, the upper end of the transparent tee 1 is provided with a supporting steel needle assembly 3, the lower end of the supporting steel needle assembly 3 extends into the indwelling needle tube 2, one end of the side wall of the transparent tee 1 is fixedly connected with a liquid guide tube 4, the liquid guide tube 4 is communicated with the transparent tee 1, the end of the liquid guide tube 4 away from the transparent tee 1 is fixedly connected with an infusion tube 6, the end of the infusion tube 6 away from the liquid guide tube 4 is provided with a positive pressure joint 9, a blood sampling connecting tube 7 is fixedly connected to the side wall of the infusion tube 6, the end of the blood sampling connecting tube 7 away from the liquid guide tube 4 is fixedly connected with an externally threaded barrel 10, the externally threaded barrel 10 is communicated with the blood sampling connecting tube 7, the side of the externally threaded barrel 10 away from the blood sampling connecting tube 7 is provided with a blood sampling assembly 8, and a negative pressure blood sampling tube is provided outside the blood sampling assembly 8;

[0019] The blood sampling assembly 8 includes a connector 801, one end of which is fixedly connected to a blood sampling steel needle 802, and the other end of which is fixedly connected to a blood sampling outlet cannula 803, which is in communication with the blood sampling steel needle 802. An isolation rubber plug 11 is provided on the inner side of the external threaded barrel 10, and one end of the blood sampling steel needle 802 close to the external threaded barrel 10 passes through the isolation rubber plug 11 and extends into the blood sampling connecting tube 7;

[0020] A sealing cap 804 is provided at one end of the blood sampling lead-out cannula 803 away from the blood sampling steel needle 802. The blood sampling lead-out cannula 803 is located on the inner side of the sealing cap 804. The sealing cap 804 is threadedly connected to the connector 801. The blood sampling lead-out cannula 803 is protected by the sealing cap 804. When blood sampling is performed, the sealing cap 804 is opened, and the blood sampling lead-out cannula 803 is inserted into the external negative pressure blood sampling tube. Then, the water stop clamp 5 is opened to perform the blood sampling operation. When the blood sampling is completed, the water stop clamp 5 can be closed.

[0021] A protective internal threaded end cap 12 is disposed outside the external threaded barrel 10, and the external threaded barrel 10 is threadedly connected to the protective internal threaded end cap 12. When the blood sampling assembly 8 needs to be replaced or removed, the protective internal threaded end cap 12 cooperates with the external threaded barrel 10 to seal and protect the isolation rubber plug 11.

[0022] A water stop clamp 5 is provided on the catheter 4 to facilitate the on-off control of blood sampling and infusion.

[0023] Working principle: When in use, the conventional indwelling needle method is used to place the indwelling needle tube 2 into the patient's blood vessel, and the supporting steel needle assembly 3 is pulled out. When performing infusion, it is directly connected to the infusion device through the positive pressure connector 9 and the water stop valve is opened. When blood sampling is required, blood sampling is not performed simultaneously with infusion. During the specific blood sampling operation, the sealing cover 804 is opened, and the blood sampling lead-out cannula 803 is inserted into the external negative pressure blood sampling tube, and then the water stop clamp 5 is opened to perform the blood sampling operation. When the blood sampling is completed, the water stop clamp 5 can be closed. When the blood sampling assembly 8 needs to be replaced or removed, the blood sampling assembly 8 can be directly pulled out. At the same time, the protective internal threaded end cap 12 and the external threaded tube 10 can cooperate to seal and protect the isolation rubber plug 11. The device is provided with a blood sampling device on the indwelling needle, which greatly reduces the puncture of the patient's blood vessels and reduces the damage to the blood vessels. At the same time, it reduces medical costs, reduces medical waste, and reduces the workload of medical staff.

Claims

1. A vacuum-capable indwelling needle for blood sampling, comprising a transparent three-way connection (1), characterized in that: The lower port of the transparent tee (1) is connected to an indwelling needle tube (2), and the indwelling needle tube (2) is made of a soft tube. The upper end of the transparent tee (1) is provided with a supporting steel needle assembly (3), and the lower end of the supporting steel needle assembly (3) extends into the indwelling needle tube (2). One end of the side wall of the transparent tee (1) is fixedly connected to a liquid guide tube (4), and the liquid guide tube (4) is in communication with the transparent tee (1). The end of the liquid guide tube (4) away from the transparent tee (1) is fixedly connected to an infusion tube (6). The end of the infusion tube (6) away from the catheter tube (4) is provided with a positive pressure joint (9), the side wall of the infusion tube (6) is fixedly connected to a blood sampling connection tube (7), the end of the blood sampling connection tube (7) away from the catheter tube (4) is fixedly connected to an external threaded tube (10), the external threaded tube (10) is communicated with the blood sampling connection tube (7), the side of the external threaded tube (10) away from the blood sampling connection tube (7) is provided with a blood sampling assembly (8), and a negative pressure blood sampling tube is provided outside the blood sampling assembly (8); The blood sampling assembly (8) comprises a connecting piece (801), one end of which is fixedly connected to a blood sampling steel needle (802), and the other end of which is fixedly connected to a blood sampling outlet cannula (803), wherein the blood sampling outlet cannula (803) is communicated with the blood sampling steel needle (802), an isolation rubber plug (11) is arranged on the inner side of the externally threaded barrel (10), and an end of the blood sampling steel needle (802) close to the externally threaded barrel (10) passes through the isolation rubber plug (11) and extends into the blood sampling connecting tube (7); A sealing cap (804) is provided at one end of the blood sampling outlet cannula (803) away from the blood sampling steel needle (802), the blood sampling outlet cannula (803) is located on the inner side of the sealing cap (804), and the sealing cap (804) is threadedly connected to the connecting piece (801); A protective internal thread end cap (12) is arranged outside the external thread barrel (10), and the external thread barrel (10) is threadedly connected to the protective internal thread end cap (12); The liquid guiding tube (4) is provided with a water stop clamp (5).

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