US Patent 10098809 Manometer with cadence indicator

A manometer with a cadence indicator includes a housing and a gas pressure indicator interfaced to the housing. An input port of the housing is for connecting the manometer to a source of gas pressure, such that the gas pressure at the input port is reflected in the gas pressure indicator, providing a pressure reading. A cadence module is interfaced to the housing such that cadence is provided concurrently with the local of the gas pressure indicator in two cadence pulse frequencies, one for timing of chest compressions and one for timing of administration of breaths. Cadence is provided visually or audibly.