| 摘要 |
Disclosed is an in vitro human vacuum blood sampling apparatus, in particular a needle cylinder type vacuum blood sampler with a slidable puncturing needle seat, comprising a blood vessel-puncturing needle tube (11), a puncturing needle seat (12), a blood-sampling needle tube (21), a blood-sampling needle seat (22), a soft connecting tube (3) and a cylinder-shaped needle cylinder (5), wherein the soft connecting tube (3) is in communication with the puncturing needle seat (12) and the blood-sampling needle seat (22), a vacuum blood-sampling tube (4) can be inserted into a cylinder-shaped empty cavity at the back of the needle cylinder (5), and the main points of the composition thereof lie in: the blood-sampling needle tube (21), the blood-sampling needle seat (22), and a blood-sampling slidable arm and a blood-sampling pusher (25) which form a blood-sampling component, which blood-sampling component is installed on the needle cylinder (5) in a manner of capable of sliding relative to the needle cylinder (5), the blood-sampling needle tube (21) and the blood-sampling needle seat (22) are provided in the inner cavity of the needle cylinder (5), the blood-sampling slidable arm is connected inside and outside to the blood-sampling needle seat (22) and the blood-sampling pusher (25) through a blood-sampling chute (52) on the side wall of the needle cylinder, the blood-sampling pusher (25) is provided outside the needle cylinder (5), and the blood-sampling chute (52) extends axially along the needle cylinder (5). Compared with the prior art, the present invention has the following advantages: a large operating force, can easily apply force, is stable in operation, reasonable in structure, the manufacturability of the assembly is good and is capable of preventing blood from backflowing. |
