A device to trigger automatically electrical stimulation at different states of in- or expiration on the background of variable lung inflation in the rabbit.
A device is described which permits to obtain a signal at the beginning of in- or expiration respectively. This signal may be used to trigger an electrical stimulator. To permit studies at different states of lung inflation the tracheal cannula is connected to a spirometer circuit. To produce constant positive or negative air pressure this bellows-type spirometer is loaded with exchangeable metal weights. The tracheal pressure is recorded by means of a pressure transducer, the output of which is taken as signal. The device allows accurate compensation of the DC-component of the transducer output resulting from spirometer operation at a maintained positive or negative pressure.
D000818:Animals; D004558:Electric Stimulation / Q000295:instrumentation*; D008168:Lung / Q000502:physiology*; D011312:Pressure; D011817:Rabbits; D012119:Respiration; D013147:Spirometry; D013997:Time Factors; D014132:Trachea