Surgery – Respiratory method or device – Ozone or ion generation
Patent
1980-11-06
1982-05-11
Kamm, William E.
Surgery
Respiratory method or device
Ozone or ion generation
A61M 516
Patent
active
043288014
ABSTRACT:
Automated dispensing apparatus is disclosed for administering intravenous fluid to a patient under gravity pressure at a controlled volumetric rate, such that deviations from a desired fluid volumetric rate are automatically corrected. The area and maximum width of each fluid drop are measured with two intersecting light beams. The light beams are either collimated or converging. Use of converging light beams is particularly advantageous when fogging or imperfections are present in the walls of a transparent tube through which the intravenous fluid flows. Apparatus, responsive to the light beams, generates signals representative of drop area and width, and these two parameters are combined to obtain a signal proportional to drop volume. The measured drop volume signal is compared with a rate control signal to automatically correct the fluid flow rate.
REFERENCES:
patent: 3609379 (1971-09-01), Hildebrandt
patent: 4001801 (1977-01-01), Moulet
patent: 4002996 (1977-01-01), Klebanoff et al.
patent: 4111198 (1978-09-01), Marx et al.
patent: 4114144 (1978-09-01), Marx et al.
patent: 4173224 (1979-11-01), Marx et al.
patent: 4181130 (1980-01-01), Bailey
Friedman William D.
Marx Alvin J.
Judlowe Stephen B.
Kamm William E.
Marx Alvin J.
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