Medical assembly

摘要

A medical needle device includes a needle assembly, a hollow needle assembly holder, and a one-way rotational collar. The needle assembly includes a needle hub supporting a needle. The needle hub has a proximal end and a distal end. The hollow needle assembly holder has a proximal end and a distal end. The distal end of the holder defines an opening communicating with the interior of the holder. The one-way rotational collar is rotatably received in the opening in the holder for connecting the needle assembly to the holder. The collar defines a needle assembly receiving socket. The proximal end of the needle hub is received in the socket. The collar is configured to co-act with the interior of the holder such that the collar and needle assembly can rotate in only one direction relative to the holder.