Apparatus and method for controlled depth of injection into...

A - Human Necessities – 61 – M

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A61M 25/00 (2006.01)

Patent

CA 2719912

An injector (10) for delivering an injectate into the myocardium of the heart may be implemented as a catheter (20) or a handheld unit. The injector includes a body, a stabilizer (30) secured to a distal end of the body, and a needle (60) that may be controllably advanced from the distal end of the body. The stabilizer stabilizes the distal end of the body relative to the myocardium while the heart beats. An enlarged region disposed along the needle prevents the needle from being advanced into the myocardium beyond a desired penetration depth. To make an injection, the physician brings the distal end of the body in proximity to the myocardium, actuates the stabilizer to stabilize the distal end relative to the myocardium, and advances the needle into the myocardium. Advancement of the needle is impeded by the enlarged region, thereby placing the needle tip at the desired penetration depth for the injection.

La présente invention concerne un injecteur (10) destiné à ladministration dun injectat dans le myocarde du cur, pouvant se présenter sous forme de cathéter (20) ou dunité portable. Linjecteur comprend un corps, un stabilisateur (30) fixé à une extrémité distale du corps et une aiguille (60) dont la pénétration peut être contrôlée depuis lextrémité distale du corps. Le stabilisateur stabilise lextrémité distale du corps par rapport au myocarde pendant que le cur bat. Une zone élargie le long de laiguille empêche celle-ci de pénétrer dans le myocarde au-delà dune profondeur de pénétration souhaitée. Pour effectuer une injection, le médecin amène lextrémité distale du corps à proximité du myocarde, actionne le stabilisateur pour stabiliser lextrémité distale par rapport au myocarde et fait pénétrer laiguille dans le myocarde. La pénétration de laiguille est bloquée par la zone élargie, ce qui permet de placer la pointe de l'aiguille à la profondeur de pénétration souhaitée pour l'injection.

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