Patent ID: 6325781
Filing Date: 2001-12-04
Classification: A61M

Abstract:
A medical puncturing device for an indwelling needle, comprising:an indwelling needle composed of an indwelling outer needle element of a soft synthetic resin capillary tube and a puncturing inner needle element of a metallic capillary tube fitted through the outer needle element;an outer sleeve for incorporating the indwelling needle and having a guide slot cut along the axial direction on the peripheral surface thereof;an actuator disposed at the rear end of the indwelling needle and having a projected actuator part fitted through the guide slot; anda spring interposed between the rear end of the actuator and the rear end of the outer sleeve for urging the indwelling needle to the retracted position inside the outer sleeve, wherein the indwelling needle can move in and out through the opening of the outer sleeve by the actuation of the actuator; and the guide slot further has an engagement window formed continuous from the proximity of the front end thereof forming an L-shaped configuration; and the indwelling needle is kept in the projected state with respect to the outer sleeve when the actuator is moved forward and the projected actuator part formed on the actuator is turned so as to be engaged with the engagement window.