Patent ID: 7331341

Claim:
An induction chamber for delivering anesthesia gas to a living specimen, the chamber comprising: a set of walls defining an interior cavity; a door that is movable between an opened condition that enables gaseous communication between the interior cavity and the environment exterior to the induction chamber through an opening, and a closed condition that seals the interior cavity from the environment exterior to the induction chamber through the opening; a gas inlet disposed in one of the set of walls and capable of providing anesthesia gas to the interior cavity; a first gas outlet disposed in one of the set of walls and capable of drawing anesthesia gas from the interior cavity when the door is in the opened condition; a passive gas outlet disposed in one of the set of walls configured to passively exhaust anesthesia gas from the interior cavity based on positive pressure in the interior cavity when the door is in the closed condition; and a gas outlet obstruction that varies flow of anesthesia gas from the interior cavity through the first gas outlet based on the position of the door.