Abstract: A demand valve resuscitator having a reduced manual flow control. The resuscitator connects between a source of pressurized gas and a breathing mask. A patient may draw a flow of gas on demand through the resuscitator by inhaling. A pressure-responsive diaphragm within a pressure chamber, actuated on demand or manually, acts on a tilt valve in a gas intake port. Alternatively, an attendant may supply a reduced flow of gas to a patient by depressing a manual control button, which tilts the intake valve. The manual control of the gas flow is overridden by excess pressure within the pressure chamber of the resuscitator and the button must be released to reassert manual control. A baffle plate in the pressure chamber provides a venturi assist to reduce pressure adjacent the diaphragm to enable the patient to obtain maximum gas flow on demand with slight inhale suction. An anti-suffocation valve allows the patient to breath ambient air in the absence of a predetermined gas inlet pressure.