Disposable needle for venous blood specimen collection (anti-reflux type)

• Main Author: LIU ZHENKUAN
• Format: Patent
• Language: Chinese; English
• Published: 08.12.2017
• Subjects: DIAGNOSIS; HUMAN NECESSITIES; HYGIENE; IDENTIFICATION; MEDICAL OR VETERINARY SCIENCE; SURGERY

The invention relates to the field of medical appliances, in particular to a disposable needle for venous blood specimen collection (anti-reflux type), comprising a venous puncture needle with a shank, a flexible tube and a needle holder; a one-way valve fixing block is arranged in a cavity of the needle holder and is fitted with a latex one-way valve; the tail end of the flexible tube is fitted to a blood inlet of the one-way valve fixing block in inserted manner; a tube plug puncture needle for connecting a negative pressure blood-collecting container is fitted to a tail blood outlet of the needle holder in an inserted manner, and the tube plug puncture needle is sleeved with a latex protective sleeve. The needle holder with the latex one-way valve arranged inside is provided herein; in venous blood collection for a human body, the latex one-way valve is opened; after the blood collection, the negative pressure blood-collecting container is pulled out, and the latex one-way valve is closed accordingly; ther