CN209421946U - blood draw connection - Google Patents

Abstract

The utility model relates to a kind of blood drawing attachment devices, including the first needle body and the second needle body, first needle body and the second needle body are connected by the first conduit, first needle body is equipped with the needle wing, first conduit is equipped with duct valve, waste liquid apparatus for placing is equipped between duct valve and the second needle body, waste liquid apparatus for placing is connected with the first conduit, second needle body is sleeved in installing pipe and casing, pressure-regulating device is equipped with below second needle body, the second conduit is set in pressure-regulating device, second conduit is connected with third needle body, the utility model is designed for children, because children's blood vessel is thinner, it can be very good whether the first needle body of observation is pierced into children's internal blood vessel using the present apparatus, convenient for operation, reduce patient because repeatedly puncturing bring pain, the utility model is easy to operate, structure is simple, it can easily be accommodated, have Extensive market prospects.

Description

blood draw connection

technical field

The utility model relates to the medical field, in particular to a blood drawing connection device.

Background technique

A blood collection needle used for collecting blood samples in the medical examination process, consisting of a needle head and a needle shaft, the needle head is arranged at the head of the needle shaft, a sheath is slidably connected to the needle shaft, and a needle is set between the sheath and the needle shaft There is a return spring and the initial position of the sheath is at the head of the needle and needle bar. When the operator holds the needle tube and presses the head of the blood collection needle on the patient's limb, the sheath will retract under the elastic force of the skin, causing the needle to protrude and penetrate the skin to cause minimal trauma. Reset under action to cover the needle to avoid contamination of the exposed needle or accidental stabbing of the human body. When the blood collection needle is pulled out, the cavity surrounded by the needle tube and the skin gradually increases, forming an instantaneous negative pressure, which is beneficial to the collection of blood samples.

Most of the blood collection needles currently on the market are designed for adults. Because of the thinner blood vessels of children, it is difficult to see whether the venous blood collection device designed for adults is punctured into the children's veins. Bleeding can also enter the catheter through the blood collection needle, and because children's blood vessels are thin and return slowly, even experienced technicians often make mistakes and perform multiple punctures when collecting blood samples for children. Traditional venous blood collection devices use The process is troublesome. The venous blood collection device sold on the market does not have a device to assist in observing the blood backflow, which is inconvenient to use for children's puncture blood collection.

Therefore, providing a blood drawing connection device with auxiliary observation of blood backflow has broad market prospects.

Contents of the invention

Aiming at the deficiencies of the prior art, the utility model provides a blood drawing connection device for assisting in observing blood backflow, which is used to overcome the defects of the prior art.

The technical solution adopted by the utility model is: a blood pumping connection device, including a first needle body and a second needle body, the first needle body and the second needle body are connected through a first catheter, and the first needle body is provided with Needle wing, the first conduit is provided with a conduit valve, a waste liquid storage device is provided between the conduit valve and the second needle body, the waste liquid storage device is connected to the first conduit, and the second needle body is set on the In the installation pipe and the casing, a pressure regulating device is arranged under the second needle body, and a second conduit is set inside the pressure regulating device, and the second conduit communicates with the third needle body.

The waste liquid containing device includes a waste liquid bag, and the waste liquid bag and the first conduit are connected through a branch pipe, and a branch pipe valve is arranged on the branch pipe.

The pressure regulating device includes a sealing gasket, the sealing gasket is a rubber circular sheet structure, a piston is arranged outside the sealing gasket, the piston is an elastic ring structure, the piston and the sealing gasket are integrated, and a push rod is arranged below the piston. The push rod is connected with the piston, and a second conduit is set inside the push rod, the top of the second conduit is connected with the bottom surface of the sealing gasket, and the diameter of the second conduit is not smaller than that of the sealing gasket.

The push rod and the piston are in one structure, the sleeve is set on the piston, the outer wall of the piston is movably connected with the inner wall of the sleeve, the sleeve is a circular tubular structure with a top seal, and the installation pipe is vertically installed on the top surface of the sleeve , the casing and the installation pipe are integrated, the installation pipe is a tubular structure, the top of the casing is provided with a through hole, the through hole is located below the hollow structure of the installation pipe, the installation pipe and the casing are connected through the through hole, the second needle body Welded on the inner wall of the installation tube, the pointed end of the second needle body is located below the through hole, the flat end of the second needle body is connected to the bottom end of the first conduit, and the top end of the first conduit is connected to the flat end of the first needle body connected.

The second conduit and the sealing pad are integrally structured, the length of the second conduit is not less than the length of the push rod, and the length of the push rod is not less than the length of the sleeve.

The second conduit is installed below the second needle body, the outer diameter of the second needle body is not larger than the inner diameter of the second conduit, the inner diameter of the second conduit is not larger than the inner diameter of the through hole, and the inner diameter of the through hole is not larger than the installation pipe The inner diameter of the second conduit is connected to the flat end of the third needle, and the outer diameter of the third needle is not greater than the inner diameter of the second conduit.

The beneficial effects of the utility model are: firstly, the product is equipped with a pressure regulating device, and by adjusting the pressure regulating device to increase the negative pressure in the blood drawing connection device, it is convenient to observe the blood backflow situation, and it is easy to judge whether the first needle body is correctly punctured into the vein secondly, there is a needle wing on the outside of the first needle body of this product, which is convenient to grasp the penetration angle of the needle body, and is convenient to use; thirdly, this product is equipped with a catheter valve to facilitate the operation of blood collection, further avoiding the Improper blood collection operation will cause air to enter the inside of human blood vessels and cause accidental injury to the human body; finally, this product is equipped with a waste liquid storage device to ensure the safety of this operation.

Description of drawings

Fig. 1 is the utility model schematic diagram.

Fig. 2 is a schematic cross-sectional view of the utility model.

Fig. 3 is a schematic cross-sectional view of the installation pipe and casing of the present invention.

Detailed ways

As shown in Figures 1, 2, and 3, a blood drawing connection device includes a first needle body 1 and a second needle body 7, the first needle body 1 and the second needle body 7 communicate through the first catheter 2, the second needle body 1 A needle body 1 is provided with a needle wing 16. The first conduit 2 is provided with a conduit valve 6. A waste liquid storage device is provided between the conduit valve 6 and the second needle body 7. The waste liquid storage device is connected to the second needle body 7. A conduit 2 is connected, the second needle body 7 is sleeved in the installation pipe 8 and the sleeve pipe 9, a pressure regulating device is arranged under the second needle body 7, and a second conduit 13 is set in the pressure regulating device, and the second conduit 13 and the The third needle body 14 is connected. The waste liquid containing device includes a waste liquid bag 4, and the waste liquid bag 4 and the first conduit 2 are connected through a branch pipe 3, and a branch pipe valve 5 is provided on the branch pipe 3. The pressure regulating device includes a gasket 12, the gasket 12 is a rubber circular sheet structure, the outer side of the gasket 12 is provided with a piston 11, the piston 11 is an elastic ring structure, the piston 11 and the gasket 12 are integrated, the piston The bottom of 11 is provided with push rod 10, and push rod 10 is connected with piston 11, and second conduit 13 is sleeved in push rod 10, and the top of second conduit 13 is connected with the bottom surface of gasket 12, and the diameter of second conduit 13 is different smaller than the diameter of gasket 12. The push rod 10 and the piston 11 are integrally structured, the sleeve 9 is set on the piston 11, the outer wall of the piston 11 is movably connected with the inner wall of the sleeve 9, the sleeve 9 is a circular tubular structure with a top seal, and the installation pipe 8 is vertical Installed directly on the top surface of the casing 9, the casing 9 and the installation pipe 8 are integrally structured, the installation pipe 8 is a tubular structure, the top of the casing 9 is provided with a through hole 15, and the through hole 15 is located below the hollow structure of the installation pipe 8 , the installation pipe 8 and the sleeve pipe 9 are connected through the through hole 15, the second needle body 7 is welded on the inner wall of the installation pipe 8, the pointed end of the second needle body 7 is located below the through hole 15, and the flat end of the second needle body 7 The end is connected with the bottom end of the first conduit 2, and the top end of the first conduit 2 is connected with the flat end of the first needle body 1. The second conduit 13 and the gasket 12 are integrally constructed, the length of the second conduit 13 is not less than the length of the push rod 10 , and the length of the push rod 10 is not less than the length of the casing 9 . The second conduit 13 is installed below the second needle body 7, the outer diameter of the second needle body 7 is not greater than the inner diameter of the second conduit 13, the inner diameter of the second conduit 13 is not greater than the inner diameter of the through hole 15, the through hole The inner diameter of 15 is not greater than the inner diameter of the installation pipe 8, the bottom end of the second conduit 13 is connected with the blunt end of the third needle body 14, and the outer diameter of the third needle body 14 is not greater than the inner diameter of the second conduit 13.

The method of using this product is as follows: First, insert the first needle body 1 into the vein, open the catheter valve 6, pull the push rod 10, and observe the blood backflow. If the blood backflow is normal, close the catheter valve 6, open the branch valve 5, and pass Push the push rod 10 to push the sealing gasket 12 to the position close to the second needle body 7, close the branch valve 5, insert the third needle body 14 into the vacuum negative pressure blood collection bottle that needs to hold the blood sample, and then open the catheter valve 6, and continue to push the push rod 10 so that the tip of the second needle body 7 completely pierces the sealing gasket 10 and communicates with the second conduit 13. After collecting the sample, first close the conduit valve 6, and then pass through the third needle body 14 from the vacuum The negative pressure blood sampling bottle is pulled out, and finally the first needle body 1 is pulled out from the venous blood vessel to complete the blood sampling operation.

Through the utility model, it is a blood drawing connection device required by workers in the medical field, so that the utility model has broad market prospects.

Claims (6)

1. a kind of blood drawing attachment device, including the first needle body (1) and the second needle body (7), the first needle body (1) and the second needle body (7) It is connected by the first conduit (2), the first needle body (1) is equipped with the needle wing (16), it is characterised in that: first conduit (2) Be equipped with duct valve (6), between duct valve (6) and the second needle body (7) be equipped with waste liquid apparatus for placing, waste liquid apparatus for placing and First conduit (2) is connected, and the second needle body (7) is sleeved in installing pipe (8) and casing (9), and pressure is equipped with below the second needle body (7) Apparatus for adjusting force is set with the second conduit (13) in pressure-regulating device, and the second conduit (13) is connected with third needle body (14).

2. blood drawing attachment device according to claim 1, it is characterised in that: the waste liquid apparatus for placing includes waste liquid capsule (4), waste liquid capsule (4) is connected with the first conduit (2) by branch pipe (3), and branch pipe (3) is equipped with branch pipe valve (5).

3. blood drawing attachment device according to claim 1, it is characterised in that: the pressure-regulating device includes gasket (12), gasket (12) is rubber circular sheet-like structures, is equipped with piston (11) on the outside of gasket (12), and piston (11) is elastic ring Shape structure, piston (11) and gasket (12) are structure as a whole, and the lower section of piston (11) is equipped with push rod (10), push rod (10) and work Plug (11) is connected, and is set with the second conduit (13) in push rod (10), the bottom surface on the second conduit (13) top and gasket (12) It is connected, the diameter of the second conduit (13) is not less than the diameter of gasket (12).

4. blood drawing attachment device according to claim 3, it is characterised in that: the push rod (10) and piston (11) is one Body structure, casing (9) are sleeved on piston (11), and the outer wall of piston (11) is flexibly connected with casing (9) inner wall, and casing (9) is The round tubular structure of top closure, installing pipe (8) are vertically installed at the top surface of casing (9), and casing (9) and installing pipe (8) are Integral structure, installing pipe (8) are tubular structure, are offered through-hole (15) at the top of casing (9), through-hole (15) is located at installing pipe (8) lower section of hollow structure, installing pipe (8) are connected with casing (9) by through-hole (15), and the second needle body (7) is welded on installation It manages on (8) inner wall, the tip end of the second needle body (7) is located at below through-hole (15), the butt end and the first conduit of the second needle body (7) (2) bottom end is connected, and the top of the first conduit (2) is connected with the butt end of the first needle body (1).

5. blood drawing attachment device according to claim 3, it is characterised in that: second conduit (13) and gasket (12) it is structure as a whole, the length of the second conduit (13) is not less than the length of push rod (10), and the length of push rod (10) is not less than set Manage the length of (9).

6. blood drawing attachment device according to claim 4, it is characterised in that: second conduit (13) is mounted on second The lower section of needle body (7), the outer diameter of the second needle body (7) are not more than the internal diameter of the second conduit (13), and the internal diameter of the second conduit (13) is not Greater than the internal diameter of through-hole (15), the internal diameter of through-hole (15) is not more than the internal diameter of installing pipe (8), the bottom end of the second conduit (13) and the The butt end of three needle bodies (14) is connected, and the outer diameter of third needle body (14) is not more than the internal diameter of the second conduit (13).