Up to 8 variables in the respiratory patterns of rats and hamsters can be measured simultaneously. The technique uses modified restraint tubes and an animal pneumotachograph.

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A method is described for the production of forced expirograms in anaesthetized laboratory animals, using a whole-body plethysmograph and a Hewlett-Packard (HP) 1000-Fcomputer.

A plastic unit with several outlets which connect with lucite polycarbonate animal holders produces good inhalation anaesthesia in several laboratory rodents simultaneously. The anaesthesia produced is easily controllable, and the gases cannot escape into the environment.