Surgery – Instruments – External pressure applicator
Patent
1993-03-18
1994-04-19
Lewis, Ralph
Surgery
Instruments
External pressure applicator
606201, A61B 1712
Patent
active
053042026
ABSTRACT:
An elongated elastic cylindrical member joined at its opposite ends to form an annular member is provided. The annular member is designed for disposition about a body limb near the end thereof adjacent the torso and with the annular member circumferentially stretched and exerting a heavy radial inward pressure upon the limb at least substantially the full length of an elongated zone extending completely about the associated limb with the inward force of the annular member on the limb being sufficient to locally compress not only limb veins closely adjacent the skin surface but also arteries spaced further beneath the limb surface.
The method comprises hyperextending veins of the limb adjacent the free end thereof by gradually rolling the annular member downwardly along the limb toward the free end thereof with the heavy radial inward pressure upon the limb being sufficient to locally compress the veins and arteries of the limb beneath the annular member and to thereby "milk" both venous and arterial blood downwardly through the veins and the arteries of the limb, whereby at least one vein adjacent the end of the limb will be engorged with blood and sufficiently hyperextended for ease of location and insertion of a needle therein preparatory to intravenous therapy.
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