Oxygen regulator and alarm system for an anesthesia machine

Details Oxygen regulator and alarm system for an anesthesia machine Oxygen regulator and alarm system for an anesthesia machine

1981-08-18

1984-04-17

Schwadron, Martin P.

Fluid handling

Self-proportioning or correlating systems

Self-proportioning flow systems

137539, 12820222, 12820314, 12820524, A61M 1700

Patent

active

044428561

ABSTRACT:
A low-oxygen alarm regulator assembly including a pair of diaphragms (40, 44) to which oxygen and nitrous oxide pressures are applied, and a displaceable intermediate member (46), the diaphragms having areas inversely proportional to desired flow rate percentages, to maintain the intermediate member in a neutral position if the desired flow ratio is maintained. The intermediate member actuates an alarm if the desired percentage flow of oxygen is not attained. In regulator operation, the assembly employs a valve (10) which is actuated with the alarm to apply an independent flow of oxygen to the oxygen diaphragm and thereby bypass an oxygen flow control valve and maintain a guaranteed oxygen flow ratio. The regulator action can be overriden by operation of a pneumatic switch (98a), which includes various safeguards to preclude inadvertent operation. A variable nitrous oxide flow restrictor 20 compensates for non-linearity in the pressure-flow characteristic for nitrous oxide at very low flows. Also disclosed are an embodiment of the regulator assembly responsive to the ratio between the flow rate of oxygen and the combined flow rates of two other gases and a ventilator alarm for detecting blockages as well as breaks in a patient breathing system is also disclosed.

REFERENCES:
patent: 1213652 (1917-01-01), Johnson
patent: 2400817 (1946-05-01), Fox et al.
patent: 3910222 (1975-10-01), Metivier
patent: 4191952 (1980-03-01), Schreiber et al.

Affiliated with

Also associated with

Rating

Oxygen regulator and alarm system for an anesthesia machine does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Oxygen regulator and alarm system for an anesthesia machine, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Oxygen regulator and alarm system for an anesthesia machine will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-90607