Catheter having compliant balloon

A kit, comprising:

• a first catheter including a first catheter shaft having a first compliant balloon mounted on the first catheter shaft and having a first interior in fluid communication with a first fluid channel of the first catheter and containing a first ultrasound transducer, wherein the first compliant balloon has a first inflation diameter range of at least 2 mm when fluid is circulated through the first fluid channel at a first flow rate;
• a second catheter including a second catheter shaft having a second compliant balloon mounted on the second catheter shaft and having a second interior in fluid communication with a second fluid channel of the second catheter and containing a second ultrasound transducer, wherein the second compliant balloon has a second inflation diameter range of at least 2 mm when fluid is circulated through the second fluid channel at a second flow rate;
• wherein the respective compliant balloons include respective balloon walls having respective working sections radially surrounding the respective ultrasound transducers, and wherein the respective working sections have a predetermined straightness when the respective working sections have the respective inflation diameter ranges;
• wherein the first inflation diameter range overlaps the second inflation diameter range, and wherein the predetermined straightness includes a cylindricity of the respective working section being less than 1 mm.

A tissue treatment catheter, comprising:

• an elongated catheter shaft extending longitudinally from a proximal end to a distal end, wherein an inlet channel, an outlet channel, electrical cabling, and a guidewire lumen extend through the catheter shaft;
• a proximal hub coupled to the proximal end, wherein the hub includes an inlet port coupled to the inlet channel and an outlet port coupled to the outlet channel, and wherein the electrical cabling extends through the proximal hub to a proximal cabling end;
• an electrical coupling mounted on the proximal cabling end and configured to receive electrical power from an electrical generator;
• an ultrasound transducer mounted on the catheter shaft and electrically connected to the electrical coupling through the electrical cabling;
• and
• a compliant balloon mounted on the catheter shaft and having an interior in fluid communication with the inlet channel and the outlet channel, and containing the ultrasound transducer, wherein the compliant balloon includes a balloon wall having a working section radially surrounding the ultrasound transducer, and wherein the working section has a predetermined straightness both when the working section has a first diameter and when the working section has a second diameter that is at least 2 mm greater than the first diameter, wherein the predetermined straightness includes a cylindricity of the working section being less than 1 mm.

A catheter, comprising:

• a catheter shaft having a fluid channel;
• an ultrasound transducer;
• and
• a compliant balloon mounted on the catheter shaft and having an interior in fluid communication with the fluid channel and containing the ultrasound transducer, wherein the compliant balloon includes a balloon body having a balloon wall, the balloon wall having a working section radially surrounding the ultrasound transducer, wherein the balloon body has a proximal end, a midpoint, and a distal end, wherein the first diameters of the balloon at the proximal end, a midpoint, and a distal end are approximately the same when the working section has a first diameter, and wherein the second diameters of the balloon at the proximal end, a midpoint, and a distal end are approximately the same when the working section has a second diameter that is at least 2 mm greater than the first diameter of the working section.