Characterization of aeroallergen-induced dyspnea in unrestrained guinea pigs by bias-flow-ventilated whole body plethysmography
Agents and actions(1992)
Abstract
Aeroallergen-induced dyspnea in guinea pigs was associated with an increase in amplitude in the box pressure fluctuations (212%) and pseudo-flow signal (604%) and an 80% decline (from 0.19 to 0.04 s) in relaxation time (the time it takes the box pressure signal to drop from its peak to 1/3 of its peak value). All of these lung dysfunction changes were highly significant (P<0.001). Pyrilamine (1 mg/kg, p.o., −2 h) inhibited dyspnea (ΔP and ΔF) by 50–53%. This technique allows quantitative analysis of allergic dyspnea in conscious, unrestrained guinea pigs.
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Key words
Quantitative Analysis,Relaxation Time,Pressure Fluctuation,Pressure Signal,Body Plethysmography
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