Abstract: A gas supply regulator/flowmeter for supplying gases to a patient from a gas cylinder, said regulator/flowmeter incorporating means to regulate gas pressure and means to control a main rate of flow of gas at a single constant flow rate or a plurality of different flow rates. A valve means is provided hereby to provide, upon activation, and downstream of the means to control the main rate of flow of gas, a temporary burst of increased flow of gas to the patient via associated resuscitation or oxygen therapy equipment.

Abstract: An improved spacer (10) for use in administering an aerosol medication to a patient includes a spacer body member (30) having a cylindrical wall (50) defining a generally hollow chamber (56), and a patient delivery member (20) in fluid communication with the chamber (56), through which medication can be delivered to the patient and a medication inlet (40). The patient delivery member (20) includes a mouthpiece (21) through which the patient can inspire medication from the chamber (56) and expire gases. An inspiratory valve (32) is coupled between the mouthpiece (21) and the chamber (56). The inspiratory valve (32) is configured for opening on inspiration by the patient, and closing upon expiration by the patient. An expiratory valve (23) is coupled between the mouthpiece (21) and an expiratory outlet (24) external of the chamber (56). The expiratory valve (23) is configured for opening upon expiration by the patient, and closing upon inspiration by the patient.

Abstract: A canister (10) is provided for use with an anaesthesia and resuscitation machine. The canister (10) includes a canister body (12) defining an interior (41) for holding carbon dioxide absorbent (114). A unidirectional expiratory valve (40) is integrally mounted to the canister body (12) through which a patient gas can pass into the canister body interior (41), and a unidirectional inspiratory valve (42) is provided through which the patient gas can pass out of the canister body interior (41). An overflow orifice (102) extends through the canister body, through which the patient gas can pass. A unidirectinal overflow valve (150) is coupled to the overflow orifice (102) for permitting a controlled flow of patient gas therethrough to maintain the desired patient gas pressure within the interior (41) of the canister body (12).