A laser energy delivery device is provided that is suitable for irradiating a body tissue with relatively long wavelength laser energy in the presence of an aqueous liquid without significant absorption of the laser energy by the liquid. The device includes an elongate hollow sheath that has an open...http://www.google.ca/patents/US20060078265?utm_source=gb-gplus-sharePatent US20060078265 - Device and method for delivery of long wavelength laser energy to a tissue site
