Abstract
Synchronization phenomena of the respiratory rhythm with the external stimulation are analyzed in order to develop the portable respirator by electrical stimulation of the phrenic nerve.
Applying a single group stimulation delayed in relation to the preceding inspiration, its effects on the interval between the stimulation and the following spontaneous inspiration are observed. The results obtained are called “the stimulation phase-inspiratory initiation time relationship”, and show two typical features : the stimulation causes inspiration to be delayed when the stimulation phase doesn't exceed the so-called switching point time, and the stimulation evokes inspiration when it does.
It is confirmed by experiments that this relationship is maintained even in the case of repetitive group stimulation, and the synchronizable stimulation period can be derived from the analysis of this relationship. The theoretical derivations are fairly consistent with the experimental results.
