Medical device with safety flexible needle

A - Human Necessities – 61 – M

Patent

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Details

A61M 25/06 (2006.01) A61N 1/05 (2006.01)

Patent

CA 2456597

A device (10) is provided for inserting medical instruments, such as pacemaker leads, into a patient. The device (10) includes a flexible needle (30) with a sharpened tip surrounded by a sheath (40) and catheter (50). A biasing element biases the needle (30) toward a position in which the needle tip is enclosed within the sheath (40). A method for inserting a medical instrument, such as a pacemaker lead, is also provided, in which the needle (30) is inserted into a patient, followed by the sheath (40) and catheter (50). The needle (30) is then retracted so that the sharpened tip is enclosed within the sheath (40). The needle (30) remains in the sheath (40) as the sheath (40) and catheter (50) are curved into alignment with a blood vessel and advanced through the blood vessel. The needle (30) and sheath (40) are then pulled out, and a pacemaker lead or other instrument is fed through the catheter (50) and into the vessel.

Dispositif (10) servant à insérer des instruments médicaux, p. ex. fils de stimulateur cardiaque, dans un patient. Le dispositif (10) comprend une aiguille (30) flexible présentant une pointe tranchante entourée d'une gaine (40) et un cathéter (50). Un élément de sollicitation sollicite l'aiguille (30) vers une position dans laquelle la pointe d'aiguille est contenue dans la gaine (40). Un procédé d'insertion d'instrument médical, p. ex. fil de stimulateur cardiaque, comporte les étapes consistant à insérer l'aiguille (30) dans un patient ; à insérer ensuite la gaine (40) et le cathéter (50) ; à rétracter l'aiguille (30) de sorte que la pointe tranchante soit contenue dans la gaine (40), l'aiguille (30) restant dans la gaine (40) lorsque celle-ci (40) et le cathéter (50) sont pliés de façon à être positionnés par rapport à un vaisseau sanguin, et avancés dans le vaisseau ; à retirer l'aiguille (30) et la gaine (40) ; et à introduire un fil de stimulateur cardiaque ou un autre instrument par le cathéter (50) dans le vaisseau.

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