Catheter including cutting element and energy emitting element

A catheter for removing tissue from a body lumen and for providing information relating to the body lumen, the catheter comprising:

• an elongate catheter body having a length and opposite proximal and distal end portions;
• a first drive shaft positioned in the catheter body, the first drive shaft being rotatable relative to the catheter body;
• a tissue cutting element adjacent the distal end portion of the catheter body and configured to rotate relative to the catheter body, the tissue cutting element being mounted to the first drive shaft to impart rotation to the tissue cutting element;
• a second drive shaft positioned in the catheter body, the second drive shaft being rotatable relative to the catheter body;
• and
• an energy emitting element adjacent the distal end portion of the catheter body and configured to rotate relative to the catheter body, the energy emitting element being mounted to the second drive shaft to impart rotation to the energy emitting element, the energy emitting element being rotatable independently of the tissue cutting element at the distal end portion, wherein the energy emitting element is positioned in the catheter body at a location that is proximal to the tissue cutting element to define a longitudinal distance between the energy emitting element and the tissue-cutting element,
• wherein the energy emitting element is non-movable and fixed relative to the length of the catheter body to inhibit movement of the energy emitting element along the length of the catheter body,
• wherein the longitudinal distance between the energy emitting element and the tissue cutting element is fixed and non-adjustable to inhibit adjustment of the longitudinal distance between the energy emitting element and the tissue cutting element,
• wherein proximal ends of the respective first and second drive shafts are rotatably coupled together so that the proximal ends of the first and second drive shafts rotate together.