Blood viscosity determination device

Details Blood viscosity determination device Blood viscosity determination device

1976-04-23

1978-04-11

Howell, Kyle L.

Surgery

Truss

Perineal

73 55, 128 2F, A61B 502

Patent

active

040833631

ABSTRACT:
An apparatus for determining blood viscosity of blood in the body is disclosed. Venous pressure in a body vein is maintained at a constant pressure, blood is then withdrawn from the vein at a constant pressure for a period of time and the volume of blood withdrawn is determined to obtain an indication of blood viscosity when in the body. The time period may be constant and the blood volume is then inversely proportional to body blood viscosity. In another embodiment a predetermined volume of blood is withdrawn and the time period is measured which is directly proportional to blood viscosity in the body. The diagnostic apparatus comprises a hollow needle, a means for withdrawing and collecting blood from the vein through the hollow needle, a negative pressure measuring device such as a vacuum gauge for effectively measuring the negative pressure used to withdraw the blood and a timing device. The in vivo blood viscosity thus measured is directly proportional to the time required to withdraw a predetermined volume of blood and inversely proportional to the volume of blood withdrawn during a fixed time interval.

REFERENCES:
patent: 2600324 (1952-06-01), Rappaport
patent: 2866453 (1958-12-01), Jewett
patent: 2910981 (1959-11-01), Wilson et al.
patent: 3157201 (1964-11-01), Littmann
patent: 3610228 (1971-10-01), Temkin
patent: 3830234 (1974-08-01), Kopp
patent: 3834372 (1974-09-01), Turney
Surgical Equipment, May-June, 1935, vol. 2, No. 3, p. 12.

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