Ultrasound catheter for disrupting blood vessel obstructions

Details Ultrasound catheter for disrupting blood vessel obstructions Ultrasound catheter for disrupting blood vessel obstructions

2011-06-07

2011-06-07

Lucchesi, Nicholas D (Department: 3763)

Surgery

Means for introducing or removing material from body for...

With means for cutting, scarifying, or vibrating tissue

Reexamination Certificate

active

07955293

ABSTRACT:
Ultrasound catheter devices and methods provide enhanced disruption of blood vessel obstructions. Generally, an ultrasound catheter includes an elongate flexible catheter body with one or more lumens. An ultrasound transmission member or wire extends longitudinally through the catheter body lumen and, in many embodiments, a guide wire tube also extends through the same lumen. A distal head is fixed to or otherwise mechanically coupled with the distal end of the ultrasound transmission member or wire and is positioned adjacent the distal end of the catheter body. Although the distal end of the catheter body overlaps the distal head, the distal head is not directly affixed to the distal end of the catheter body. Thus, the distal tip may move freely, relative to the distal end of the catheter body when ultrasonic energy is applied through the ultrasound transmission member. Such a freely floating distal head enhances the efficiency of an ultrasound catheter, enabling the catheter to ablate calcific occlusions and increasing the useful life of the ultrasound transmission member and catheter.

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