IMPROVED PROTECTIVE SHEATH FOR A CANNULA

摘要

A protective device for enclosing the scarf (86) of a cannula (70) includes an elongated sheath (82) having a bore (71) extending through it. The cannula (70) is sealed in the bore (71) of the sheath (82) with the scarf end of the cannula (70) located within and adjacent one end of the sheath (82), which is spaced from the scarf (56). The end of the sheath adjacent the scarf end of the cannula has at least one cutout (84) portion which can receive the edge of a flexible bag or a flexible tubing connected to a Y-site for intravenous injection. A socket (92) carried by the sheath (82) at the other end of the cannula (70) has an opening through it in communication with the bore (71) through the cannula (70). The socket opening (92) tapers outwardly away from the cannula (70) for receiving a tapered nozzle on a syringe. Preferably, the sheath (52) surrounds the socket (92) and carries inwardly extending ears (96) which act as male threads for engaging internal threads in a skirt around the discharge nozzle of a syringe. The skirt makes a slip fit against the inside of the sheath surrounding the socket and inwardly extending ears. Preferably the outside surface of the syringe skirt is irregular to provide an increased coefficient of friction against the interior surface of the sheath.