Instruments and methods for minimally invasive vascular procedures
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United States of America Patent
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Mar 14, 2000
Grant Date -
N/A
app pub date -
Jan 23, 1997
filing date -
Jan 24, 1996
priority date (Note) -
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Abstract
A 360.degree. dissection instrument and method for accomplishing an atraumatic blunt dissection of connective tissues in 360.degree. around the circumference of a saphenous vein and branch veins to facilitate a minimally invasive harvesting of the vein. The 360.degree. pulsable dissector has an elongate body with a distal dissecting surface that is progressively 'circumferential' or 'wrapped' around an axial vessel-receiving passageway or channel. The dissecting surface includes a longitudinal gap that has a reduced transverse dimension in the proximal direction to funnel branch veins through the gap. The wrapped dissecting surface includes an 'active' periphery incorporating a pulsable expansion structure of elastomeric material having and interior pressurizable chamber. An inflation lumen in the dissector body communicates with a pressure source and a pulse-control mechanism. A single pulse will move the expansion structure in a 'pulse cycle' through an 'expansion phase' and a 'contraction' phase at pulse intervals ranging from 1/second to 100/second. In one embodiment, endoscopic viewing means are provided within the body of the dissector.
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