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US 7,351,219 B2Granted
Method and instrumentation for cooling a surgical incision
AssigneeAlcon Inc.
InventorRichard J. MacKool
Life of this patent
Estimating the term…
Abstract
An infusion sleeve of an ultrasonic vibrating needle. The sleeve is collapsible and serrated or scalloped at a distal end. Fluid flows through a passage between the needle and the infusion sleeve in a direction from the proximal end of the sleeve to a distal end of the sleeve. Upon reaching the distal end, the fluid emerges by flowing across valley formations that are between peak formations of the distal end of the infusion sleeve. The peak formations abut the exterior of the incision so that the fluid flow cools tissue at the incision and the needle.
Claims6
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being made of a flexible material that is collapsible and expandable axially as the needle is repetitively partially withdrawn and advanced.
Dependencies are inferred from the claim text.