Safety stylet for intravenous catheter insertion

A - Human Necessities – 61 – M

Patent

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Details

A61M 25/06 (2006.01)

Patent

CA 2216448

A catheter insertion device (10) has a stylet (12) with a needle (14) extending therefrom. A catheter (16) has a cannula (20) surrounding he needle (14) and a connection hub (22) supported upon an alignment member (24) at the front of the stylet (12). A spring (44) exerts a earward force upon the needle (14). A needle retaining member (14) having a releasable latch mechanism is positioned within the stylet 12) for counteracting the rearward force of the spring (44) and holding the needle in the extended position. After insertion of the catheter 16) within a blood vessel of a patient, a predetermined force is applied to an actuating member (64) protruding from the rear of the stylet 12). The actuating member (64) releases the latch mechanism, and the needle (44) is propelled by the spring (44) to be permanently etained within an internal cavity (72) of the stylet (12).

Un dispositif d'insertion (10) pour un cathéter a un guide (12) avec une aiguille (14) partant de celui-ci. Un cathéter (16) a une canule (20) entourant l'aiguille (14) et un élément de raccordement (22) porté par un élément d'alignement (24) à l'avant du guide (12). Un ressort (44) exerce une force dirigée vers l'arrière, sur l'aiguille (14). Un dispositif de blocage de l'aiguille (14) ayant un mécanisme de verrouillage libérable est disposé dans le guide (12) pour contrecarrer la force dirigée vers l'arrière du ressort (44) et tenir l'aiguille dans sa position saillante. Après insertion du cathéter (16) dans un vaisseau sanguin du patient, une force prédéterminée est appliquée sur l'élément d'actionnement (64) faisant saillie hors de l'arrière du guide (12). L'élément d'actionnement (64) libère le mécanisme de verrouillage et l'aiguille (14) est projetée par le ressort (44) pour se loger d'une manière permanente dans une cavité interne (72) du guide (12).

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