System for assessing lachrymal fluid content of a sample pad

Details System for assessing lachrymal fluid content of a sample pad System for assessing lachrymal fluid content of a sample pad

1989-08-14

1991-02-19

Wieder, Kenneth

Electricity: measuring and testing

Impedance, admittance or other quantities representative of...

Lumped type parameters

324690, 324661, 422 8202, 128771, G01R 2726, G01N 3100

Patent

active

049947516

ABSTRACT:
A system rapidly and accurately assesses the lachrymal fluid content in a person's eye which minimizes patient discomfort. The preferred system includes a fluid sampling device and an assessment device. The preferred sampling device includes a lachrymal fluid absorbent sample pad and a non-absorbent handle. The preferred assessment device includes a receiver for receiving a lachrymal fluid sample pad and includes a control circuit coupled with the receiver for determining the electrical capacitance of the pad which capacitance varies in accordance with variations in lachrymal fluid content, and for producing an output correlated with the lachrymal fluid quantity in the pad.

REFERENCES:
patent: 3206386 (1965-09-01), Kopito
patent: 3753099 (1973-08-01), Kleinberg et al.
patent: 4584522 (1986-04-01), Varela
patent: 4881025 (1989-11-01), Gregory

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