Patent ID: 7351219

Claim:
A method of preparing to cool, comprising: extending a needle within confines of an infusion sleeve that is hollow and projecting a tip of the needle outwardly beyond a distal end of the infusion sleeve, defining a passage between an interior surface of the infusion sleeve and an exterior surface of the needle, terminating the infusion sleeve at the distal end by peak and valley formations, arranging the valley formations closer to a proximal end of the infusion sleeve than are the peak formations, and abutting an exterior of an incision with the peak formations of the infusion sleeve so that flowing fluid through the passage to the distal end of the infusion sleeve and away from the proximal end results in the fluid thereafter flowing across the valley formations, the needle defining an interior channel, and the infusion sleeve being elongated between the proximal and distal ends and being made of a flexible material that is collapsible and expandable axially as the needle is repetitively partially withdrawn and advanced.