Venipuncture method

Details Venipuncture method Venipuncture method

1978-03-23

1979-11-27

Kamm, William E.

Surgery

Truss

Pad

128760, A61B 1000

Patent

active

041755430

ABSTRACT:
A method of effecting venipuncture in the human body includes the steps of cooling the skin over a venous area of the body by applying a cold pack thereto and providing on the cooled skin in heat exchange relation thereto a layer of an enantiotropic cholesteric liquid crystalline phase material exhibiting a mesophase color change at a temperature reached by the skin due to venous blood flow, warming the cooled skin by venous blood flow in such area thereby to produce a mesophase color change in the material delineating a vein therebeneath, and directing an instrument for venipuncture to a site in such area indicated by the delineation to constitute the location of a vein.

REFERENCES:
patent: 2237971 (1941-04-01), Padelford
patent: 3998210 (1976-12-01), Nosari

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