Flow controller
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United States of America Patent
Stats
-
Nov 15, 1988
Grant Date -
N/A
app pub date -
Dec 4, 1986
filing date -
Dec 4, 1986
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
An oxygen flow controller for use in administering oxygen from a pressure-regulated source on demand to a patient through a nasal cannula is disclosed. A flow path is opened by a solenoid valve in response to the negative pressure created in the nasal canula by the patient's inhalation. The valve is opened for the interval needed to maintain an inhalation to exhalation ration of one-to-two, and the timing cycle and the open and closed duration times of the valve are made to automatically match the patient's breathing.
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