Blood sampling three-way stopcock and blood sampling instrument

Abstract

The invention discloses a blood sampling three-way stopcock. The blood sampling three-way stopcock comprises a three-way needle holder as well as a blood discharge needle and an air extraction needle which are arranged on the three-way needle holder, wherein a blood sampling port, a blood discharge needle hole, an air extraction needle hole, an air exhaust port and a blood inlet hole are formed in the three-way needle holder; a blood sampling needle tube is arranged at the blood sampling port; the air extraction needle hole is located in an orifice section of the blood discharge needle hole; one end of the blood discharge needle is arranged in the blood discharge needle hole; the blood sampling needle tube communicates with the blood discharge needle through the blood inlet hole; the air extraction needle is arranged in the air extraction needle hole; the inner diameter of the air extraction needle is larger than the outer diameter of the blood discharge needle; the air extraction needle is parallel to the blood discharge needle; one side of a needle tip in an inner cavity of the air extraction needle is contacted with the blood discharge needle; a channel formed between the air extraction needle and the blood discharge needle communicates with the air exhaust port. During using, the air extraction needle is inserted into the only one insertion hole of the blood sampling tube along with the blood discharge needle, so that the probability of carrying pollutants in the blood sampling tube is reduced, the problem of change of an acting point when the air extraction needle is inserted into the blood sampling tube is solved, and the operation is convenient. The invention further provides a blood sampling instrument comprising the blood sampling three-way stopcock.

Description

technical field [0001] The invention relates to the technical field of medical devices, in particular to a three-way joint for blood collection and a blood collection instrument using the three-way joint for blood collection. Background technique [0002] In the past, during the blood collection process, one end of the blood collection needle was generally inserted into a human vein, and the other end was inserted into a blood collection tube with a preset negative pressure. Due to the negative pressure in the blood collection tube, blood automatically flowed into the blood collection tube. However, the blood collection tubes with preset negative pressure cannot accurately control the blood collection volume during blood collection. The risk of losing negative pressure leads to a high reject rate of blood collection tubes. [0003] At present, there is a blood collection three-way joint, which has a blood drawing needle at one end; the other end is provided with two needles...

AI Technical Summary

Problems solved by technology

[0004] The present invention provides a three-way joint for blood collection and a blood collection instrument including the three-way joint for blood collection, so as to solve the above-mentioned technical problems of inconvenient operation of the blood collection tube and inserting two holes into the blood collection tube

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