Instruments and methods for minimally invasive vascular procedur

Details Instruments and methods for minimally invasive vascular procedur Instruments and methods for minimally invasive vascular procedur

1997-01-23

2000-03-14

Buiz, Michael

Surgery

Instruments

Blunt dissectors

606191, 606159, A61B 1700

Patent

active

06036713&

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.

REFERENCES:
patent: 5603720 (1997-02-01), Kieturakis
patent: 5667480 (1997-09-01), Knight et al.
patent: 5759150 (1998-06-01), Konou et al.

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