The tidal volume delivered by a manual resuscitator shows large variations. There were significant differences in the volume delivered by compression methods, but physical characteristics are not a predictor of tidal volume delivery. The manual resuscitator is not a suitable device for accurate ventilation.
A vibration isolation system called Type-Bp system used for power recycling mirrors has been developed for KAGRA, the interferometric gravitationalwave observatory in Japan. A suspension of the Type-Bp system passively isolates an optic from seismic vibration using three main pendulum stages equipped with two vertical vibration isolation systems. A compact reaction mass around each of the main stages allows for achieving sufficient damping performance with a simple feedback as well as vibration isolation ratio. Three Type-Bp systems were installed in KAGRA, and were proved to satisfy the requirements on the damping performance, and also on estimated residual displacement of the optics.
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