| 摘要 |
This invention relates to medical venipuncture devices for hemodialysis, blood collection, etc. (see fig. 14). The device includes a hollow needle movably located inside a tubular plastic protector. In the state ready for venipuncture, a needle sharp point is extended distally of a protector's distal end. The user inserts the needle and the protector into patient's vein and by a transposing means single-handedly displaces the protector for a short distance into the operation position, wherein the needle sharp point is concealed inside the protector eliminating the vein's injury and, subsequently, personnel's infection by the needle. A lock means disposed beyond blood flow automatically and reliably fix the device in this position. The needle and protector form a common blood passageway without vortices and clot formation. The device is provided with a sealing member eliminating a blood leakage. The device features short length convenient for operation. |
