Anterograde/retrograde spiral dissector and method of use in vein grafting
Patent 5653722 Issued on August 5, 1997. Estimated Expiration Date: 
January 3, 2015. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.
January 3, 2015. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.Patent References 4030503 Transluminal lysing system Catheter with coiled tip Process and apparatus for harvesting vein Catheter with flexible cutter Endoscope and method for vein removal Ultrasonic dissector and detacher for atherosclerotic plaque and method of using same Patent #: 5480379 InventorApplicationNo. 367705 filed on 01/03/1995US Classes:606/159, Blood vessel, duct or teat cutter, scrapper or abrader606/170, Cutter carried on elongated probe-like member606/191Internal pressure applicator (e.g., dilator)ExaminersPrimary: Buiz, MichaelAssistant: Lewis, William Attorney, Agent or FirmForeign Patent References
International ClassA61B 017/00AbstractA surgical instrument for bluntly dissecting connective tissues in a plane around a vein or other anatomic structure in a minimally invasive surgery. An anterograde or retrograde spiral dissector comprises one or more elongate spiral members, each having a blunt distal tip adapted for helical advancement in a plane around the surface of a vein. Anterograde helical advancement of the spiral assembly bluntly dissects small diameter "guide paths" in connective tissues with little resistance to penetration. With the spiral dissector thus helically engaged, the instrument drives itself anterograde upon rotation. The spiral dissector includes a "path-expanding" structure associated with either a distal, medial or proximal region of each spiral member, by which is meant the path-expanding structure is adapted for anterograde or retrograde travel along the dissected "guide paths" to further expand the dimensions of the guide paths thereby to dissect the connective tissues in a 360° plane around the vein.Field of SearchCutting, puncturing or piercingBlood vessel, duct or teat cutter, scrapper or abrader Cutter carried on elongated probe-like member Recriprocating or oscillating cutter Blunt dissectors Internal pressure applicator (e.g., dilator) Inflatable or expandible by fluid Expanding dilator (e.g., expanding arm, etc.) Jaw structure INSTRUMENTS Having means expanding body orifice or canal (e.g., dilator, retaining means, etc.) Expanding bow Expanding arm or finger Oral cavity protectors | |
