US Patent 7798977 Disposable blood sampling device

A disposable blood sampling device is disclosed herein, which includes a plunger, a rubber stopper, a barrel, a sealing member, a needle holder, a protection sleeve, an anticoagulant storing tube and a needle sheath. In use, the disposable blood sampling device is deconstructed by removing each component therefrom and is unable to be assembled again for recycling. Furthermore, the needle can be hidden in the protection sleeve before it is detached from the blood sampling device, which effectively prevents a medical operator from being hurt or even infected by the needle.