Ultrasound catheter devices and methods

An ultrasound catheter comprising:

• an elongate catheter body having a proximal end, a distal end and at least one lumen;
• a housing coupled with the proximal end of the catheter body, the housing having an inner cavity and a fluid inlet;
• an ultrasound transmission member extending longitudinally through the lumen of the catheter body and having a proximal end and a distal end, at least a portion of the ultrasound transmission member being disposed within the housing;
• a metalized elastomer disposed within the housing and on a proximal side of the fluid inlet, the metalized elastomer being in contact with the housing;
• and
• an O-ring member disposed at least partially between the metalized elastomer and the ultrasound transmission member.

An ultrasound catheter for disrupting occlusions in blood vessels, the ultrasound catheter comprising:

• an elongate flexible catheter body having a proximal end, a distal end and at least one lumen;
• a housing coupled with the proximal end of the catheter body and having a fluid inlet;
• an ultrasound transmission member extending longitudinally through the lumen of the catheter body and having a proximal portion, the proximal portion being disposed in the housing;
• a heat dissipation feature disposed at least partially between the housing and the ultrasound transmission member on a proximal side of the fluid inlet, the heat dissipation feature being in contact with the housing so as to conduct energy from the ultrasound transmission member to the housing;
• and
• at least one O-ring, wherein at least a portion of the heat dissipation feature is disposed between the at least one O-ring and the housing.

An ultrasound catheter comprising:

• an elongate catheter body having a proximal end, a distal end and at least one lumen;
• a housing coupled with the proximal end of the catheter body;
• an ultrasound transmission member extending longitudinally through the lumen of the catheter body and having a proximal end and a distal end, at least a portion of the ultrasound transmission member being disposed within the housing;
• a metalized elastomer disposed within the housing;
• and
• an O-ring member disposed at least partially between the metalized elastomer and the ultrasound transmission member.

An ultrasound catheter for disrupting occlusions in blood vessels, the ultrasound catheter comprising:

• an elongate flexible catheter body having a proximal end, a distal end and at least one lumen;
• a housing coupled with the proximal end of the catheter body;
• an ultrasound transmission member extending longitudinally through the lumen of the catheter body and having a proximal portion, the proximal portion being disposed in the housing;
• a heat dissipation feature disposed at least partially between the housing and the ultrasound transmission member;
• and
• at least one O-ring, wherein at least a portion of the heat dissipation feature is disposed between the at least one O-ring and the housing.