Surgery – Means for introducing or removing material from body for... – Material introduced into and removed from body through...
Patent
1980-09-08
1984-07-17
Kamm, William E.
Surgery
Means for introducing or removing material from body for...
Material introduced into and removed from body through...
604 34, 604 67, A61M 500
Patent
active
044603533
ABSTRACT:
Apparatus controls the rate of passage of fluid drops through a drip controller in accordance with a preset rate. When the rate of passage of the fluid drops is less than the preset rate, a stepper motor is incrementally operated at progressive instants of time to open the drip chamber until the measured rate is equal to the preset rate. When the rate of passage of the fluid drops is greater than the preset rate, the stepper motor is operated instantaneously to close the passage through a number of increments corresponding to the difference in the measured and preset rates.
An alarm is energized when the stepper motor is positioned to provide for a maximum flow of fluid and the rate is still below the preset rate. An alarm is also energized when the passage is closed and the preset rate indicates a desired flow of fluid.
An emergency motor is also provided to control the opening in the passage. Before the operation of the apparatus is instituted, the stepper motor is operated to close the drip chamber. The emergency motor is then operated to open the drip chamber and thereafter close the drip chamber. The emergency motor may thereafter be operated to close the passage when the drop controller fails to meet certain standards.
REFERENCES:
patent: 3609379 (1971-09-01), Hildebrandt
patent: 3623052 (1971-11-01), Spiller
patent: 4001801 (1977-01-01), Monlet
patent: 4137940 (1979-02-01), Faisandier
patent: 4173224 (1979-11-01), Marx et al.
patent: 4207871 (1980-06-01), Jenkins
patent: 4300552 (1981-11-01), Cannon
patent: 4314567 (1982-02-01), Cannon
Deckert Clinton L.
Jenkins Jon A.
Wilson Larry L.
Hanley John C.
Imed Corporation
Kamm William E.
Roston Ellsworth R.
Schwartz Charles H.
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