Abstract: A system and method of administrating conventional hyperbaric chamber therapy as well as supplemental oxygen therapy at ambient conditions to an animal using a veterinary hyperbaric chamber. The hyperbaric chamber can function in its usual mode of operation; i.e., providing oxygen at greater than atmospheric pressure and also in a second mode of operation to administer supplemental oxygen thereafter at ambient pressure conditions. In the second mode of operation, the method and apparatus may deliver approximately 80 liters per minute continuous flow of 0.21 through 1.0 FI02 adjustable oxygen gas mixture. The mixture is delivered at ambient pressure from one end of the chamber, flows across the animal positioned within the hyperbaric chamber, and exits at the opposite end for exhaust to ambient conditions. A high flow gas mixture is utilized to maintain accurate gas mixture concentrations with fluctuating supply pressures of medical air and medical oxygen gases.

Abstract: An improved device for providing a patient triggered breath to a patient including a ventilator having one tube that supplies a flow of a gas and another tube that delivers gas to an exhalation valve, an endo-tracheal tube that is in communication with the lungs of the patient, and a connector for connecting the supply tube from the ventilator to the endo-trachael tube. The connector has a chamber and a two-way check valve, the two-way check valve having an inhalation check valve and an exhalation check valve. The wall of the connector may further include an opening for connection to a pressure transducer. The volume of the chamber of the connector is between about 1.0 cm3 to 1.3 cm3 and the exhalation valve is selectively moved from its opened position to its closed position when the pressure transducer senses a reduction in pressure within the chamber of between about 0.25 cm of water and 2.

Abstract: An improved software control system for a positive pressure ventilator that implements the controller that regulates the ventilator solenoid as a finite state machine. The use of a state machine implementation provides multiple degrees of freedom to the designer and provides for a modular, fail safe design.