CN205947795U - Child venous blood sampling device with negative pressure - Google Patents

Abstract

The utility model discloses a children take negative pressure vein blood sampling device, including the blood taking needle, still include the elasticity collector, be equipped with in the elasticity collector and collect the chamber, the blood taking needle return the blood vessel with collect the chamber intercommunication, the utility model has the advantages of simple structure, convenient to use, single can accomplish the operation.

Description

A kind of negative pressure venous blood collection device for children

technical field

The utility model relates to a medical device, in particular to a device for taking blood from a vein with negative pressure for children.

Background technique

Venous blood collection is a basic inspection method in clinical diagnosis and treatment, and it is also one of the important contents of nursing work. Traditional venous blood collection mainly uses vacuum blood collection tubes and blood collection needles. After the blood collection needle is inserted into the needle, it is inserted along the direction of the blood vessel. After seeing the return of blood, insert the tail end of the blood collection needle into the vacuum blood collection tube until the required blood volume is obtained. If there is no return of blood, adjust the angle of the needle appropriately, or return to the subcutaneous area and touch the blood vessel again to puncture until the needle returns to blood before connecting the vacuum negative pressure tube.

In order to improve the success rate of blood collection, the medical staff proposed a blood collection method with negative pressure, that is, when the blood collection needle enters the subcutaneous, connect the tail end of the blood collection needle to the vacuum blood collection tube, and then advance the needle in the original direction, under the action of negative pressure, As long as the needle tip enters the blood vessel, blood can be seen in the needle tube immediately. This method has an obvious effect on improving the success rate of blood collection, but when using this method to collect blood from infants, due to the uncooperativeness of the infant, the nurse needs to fix the infant with one hand, leaving only the other hand to operate, and it is difficult to complete the needle independently. Immediately after entering the subcutaneous area, the method of inserting the vacuum blood collection tube needs to be assisted by an assistant, which is a waste of manpower.

The condition for the blood collection needle to enter the blood vessel to produce blood return is that the pressure in the vein is greater than the pressure at the puncture needle. The pressure in the vein is different in different parts of the human body and in different diseases. The peripheral venous pressure of a normal person is about 13 cm water column, and the antecubital venous pressure is about 10 cm. The water column and dorsal venous pressure of the foot are about 19cm water column, but the negative pressure set by the vacuum blood collection tube currently used is constant and cannot be adjusted, so that some children with small blood vessels and poor peripheral circulation have difficulty in blood collection. Blood returns, mistakenly thought that the puncture failed, increased the pain of repeated punctures for children, reduced the satisfaction of parents, and increased the work pressure of nurses.

In addition, the commonly used blood collection needles are exposed steel needles, and the nurses are easily injured during the operation. The steel needle twists and punctures the puncture site due to the resistance of the child in the blood vessel, and the steel needle can easily puncture the blood vessel and form a hematoma.

Utility model content

The technical problem to be solved by the utility model is to overcome the deficiencies of the prior art, and provide a children's venous blood collection device with negative pressure that has a simple structure and can be operated independently by a single person.

In order to solve the above-mentioned technical problems, the utility model adopts the following technical scheme: a kind of negative pressure venous blood collection device for children, including a blood collection needle, and also includes an elastic collector, the elastic collector is provided with a collection cavity, and the blood collection needle The return blood vessel communicates with the collection cavity.

As a further improvement of the above technical solution:

The elastic collector includes an elastic collection tube, a piston, and a push-pull rod. One end of the elastic collection tube is provided with a blood return joint. The piston is arranged in the elastic collection tube. The push-pull rod is fixedly connected to the piston. The tube cooperates with the piston to form the collection chamber, and the return blood vessel of the blood collection needle communicates with the collection chamber through the blood return joint.

The end of the elastic collection tube away from the blood return joint is fixed with a first protruding ring along the outer periphery, and the end of the push-pull rod away from the piston is provided with a second protruding ring along the circumference.

The return blood vessel of the blood collection needle is socket-connected with the blood return joint.

The blood collection needle includes a flexible tube and a steel needle core placed in the flexible tube, and the return blood vessel is arranged on the flexible tube.

The front end of the steel needle core is the piercing end, and the rear end of the steel needle core is provided with a needle handle.

Compared with the prior art, the utility model has the advantages that: the negative pressure venous blood collection device for children disclosed by the utility model includes an elastic collector, and a collection cavity is arranged in the elastic collector, and the collection cavity communicates with the return blood vessel of the blood collection needle. , When using, hold the elastic collector tightly with one hand to discharge the air in the collection chamber, and control the needle insertion with the other hand. After the needle tip enters the subcutaneous area, release the squeezed elastic collector. The elastic collector relies on its own elasticity to recover and collect Negative pressure is formed in the cavity, and then the needle continues to be inserted. Once the needle enters the blood vessel, the blood can be drawn out immediately. The structure is simple and easy to use, and a single person can complete the operation independently.

Furthermore, the piston and the elastic collection tube are used to cooperate to form a collection chamber, and the negative pressure in the collection chamber can be adjusted by pushing and pulling the piston to different positions during blood collection, so that the device can be applied to different patients and different blood collection sites .

Furthermore, the steel needle core is placed in the hose, and after the needle penetrates into the blood vessel, the steel needle core is retracted or pulled out to realize blood drawing and needle pulling out of the hose, and prevent the child from twisting during the blood collection process. The blood vessel is punctured by the steel needle core to form a hematoma. After the needle is pulled out, the tip of the steel needle core retreats into the hose, preventing the nurse from being punctured, and the cost is low.

Description of drawings

Fig. 1 is a schematic structural view of a negative pressure venous blood collection device for children of the present invention.

Each label in the figure indicates: 1, blood collection needle; 11, return blood vessel; 12, steel needle core; 121, needle handle; 122, piercing end; 13, hose; 2, elastic collector; 21, collection cavity; 22 , the piston; 23, the push-pull rod; 231, the second convex ring; 24, the elastic collection tube; 241, the blood return joint; 242, the first convex ring.

detailed description

The utility model will be described in further detail below in conjunction with the accompanying drawings and specific embodiments.

As shown in Figure 1, the negative pressure venous blood collection device for children of the present embodiment includes a blood collection needle 1 and an elastic collector 2. The elastic collector 2 is provided with a collection cavity 21. Cavity 21 is connected. When using the negative pressure venous blood collection device for children, hold the elastic collector 2 tightly with one hand to discharge the air in the collection cavity 21. The other hand controls the insertion of the blood collection needle 1. After the needle tip enters the subcutaneous area, relax Extruded elastic collector 2, elastic collector 2 relies on its own elasticity to restore, the collection chamber 21 forms a negative pressure, and then continues to insert the needle, once the needle enters the blood vessel, blood can be drawn out immediately, its structure is simple, and the need for blood collection The operation of inserting the needle 1 into the vacuum blood collection tube is easy to use, and a single person can complete the operation independently.

In this embodiment, the elastic collector 2 includes an elastic collection tube 24, a piston 22, and a push-pull rod 23. One end of the elastic collection tube 24 is provided with a blood return joint 241, the piston 22 is arranged in the elastic collection tube 24, and the push-pull rod 23 is fixed to the piston 22. connection, the elastic collection tube 24 cooperates with the piston 22 to form a collection cavity 21, and the return blood vessel 11 of the blood collection needle 1 communicates with the collection cavity 21 through the blood return joint 241. During blood collection, push and pull the piston 22 to different positions through the push-pull rod 23 to adjust the collection The magnitude of the negative pressure in the cavity 21 makes the device applicable to different patients and different blood collection sites.

In this embodiment, the end of the elastic collection tube 24 away from the blood return joint 241 is fixed with a first convex ring 242 along the outer periphery, and the end of the push-pull rod 23 away from the piston 22 is provided with a second convex ring 231 along the circumference, so that the push-pull rod 23 can be easily operated to change The position of the piston 22.

In this embodiment, the return blood vessel 11 of the blood collection needle 1 is socketed and connected with the blood return joint 241, which is convenient for disassembly. After disassembly, the return blood vessel 11 can be connected with the infusion set for infusion treatment, reducing repeated punctures.

In this embodiment, the blood collection needle 1 includes a flexible tube 13 and a steel needle core 12 placed in the flexible tube 13. The return blood vessel 11 is arranged on the flexible tube 13. The front end of the steel needle core 12 is a piercing end 122. The steel needle core The rear end of 12 is provided with a needle handle 121, after the needle is inserted into the blood vessel, the steel needle core 12 is retreated or pulled out through the needle handle 121, so as to realize the blood drawing of the hose 13 and the pulling out of the needle of the hose 13, so as to avoid the risk of injury during the blood collection process. The blood vessel is punctured by the steel needle core 12 to form a hematoma because of twisting. After the needle is pulled out, the front end of the steel needle core 12 retreats into the flexible pipe 13, preventing the nurse from being stabbed, and the cost is low.

The usage method of the children's band negative pressure venous blood sampling device of the present utility model is as follows:

1) Use the push-pull rod 23 to move the piston 22 to a proper position;

2) Hold and squeeze the elastic collector 2 tightly with one hand to discharge the air in the collection cavity 21, and control the insertion of the blood collection needle 1 with the other hand, and release the squeezed elastic collector 2 after the needle tip enters the subcutaneous area. The elastic collector 2 is restored by its own elastic force, and negative pressure is formed in the collection chamber 21;

3) Continue to insert the needle. Once the needle enters the blood vessel, the blood can be drawn out immediately. If the blood does not return, the piston 22 can be moved to increase the volume of the collection chamber 21, thereby increasing the negative pressure in the collection chamber 21;

4) Pull back or pull out the steel needle core 12 through the needle handle 121 to realize the blood drawing of the hose 13. If infusion therapy is required after the blood collection is completed, disconnect the connection between the return blood vessel 11 and the blood return joint 241, and insert the The return blood vessel 11 is connected with the infusion set.

Although the present invention has been disclosed above with preferred embodiments, it is not intended to limit the present invention. Any person familiar with the art, without departing from the scope of the technical solution of the present utility model, can use the technical content disclosed above to make many possible changes and modifications to the technical solution of the utility model, or modify it into an equivalent change, etc. effective example. Therefore, any simple modifications, equivalent changes and modifications made to the above embodiments according to the technical essence of the present invention shall fall within the protection scope of the technical proposal of the present invention.

Claims (6)

1. A negative pressure venous blood collection device for children, including a blood collection needle (1), characterized in that it also includes an elastic collector (2), and the elastic collector (2) is provided with a collection cavity (21), so The return blood vessel (11) of the blood collection needle (1) communicates with the collection cavity (21). 2. The venous blood collection device with negative pressure for children according to claim 1, characterized in that: the elastic collector (2) includes an elastic collection tube (24), a piston (22) and a push-pull rod (23), the One end of the elastic collection tube (24) is provided with a blood return joint (241), the piston (22) is arranged in the elastic collection tube (24), the push-pull rod (23) is fixedly connected with the piston (22), the The elastic collection tube (24) cooperates with the piston (22) to form the collection cavity (21), and the return blood vessel (11) of the blood collection needle (1) connects with the collection cavity ( 21) Connected. 3. The venous blood collection device with negative pressure for children according to claim 2, characterized in that: the end of the elastic collection tube (24) away from the blood return joint (241) is fixed with a first convex ring (242) along the outer periphery ), the end of the push-pull rod (23) away from the piston (22) is provided with a second convex ring (231) along the circumference. 4. The venous blood collection device with negative pressure for children according to claim 2, characterized in that: the return blood vessel (11) of the blood collection needle (1) is socket-connected to the blood return joint (241). 5. The venous blood collection device with negative pressure for children according to any one of claims 1 to 4, characterized in that: the blood collection needle (1) includes a hose (13) and a tube placed in the hose (13) A steel needle core (12), the return blood vessel (11) is arranged on the flexible tube (13). 6. The venous blood collection device with negative pressure for children according to claim 5, characterized in that: the front end of the steel needle core (12) is the piercing end (122), and the rear end of the steel needle core (12) is provided with Needle handle (121).