DEVICE: Cavagna (00850009834041)

A reduction valve designed to be attached through a gastight connector (e.g., a pin-index or bull-nosed screw thread connection) to the valve stem of a medical gas (e.g., carbon dioxide, oxygen, nitrous oxide, gas mixture) cylinder to reduce high, variable gas pressure to a lower, constant working pressure (excludes procedure-dedicated valves). It can be a single or a dual stage regulator, usually of a piston or diaphragm design. It will have a safety relief valve to avoid excessive pressure due to increased ambient temperatures, and it may have associated devices (e.g., a manometer, flowmeter) to display the available gas reserve of a gas cylinder, the working pressure and/or the flow rate.

A gas-regulating component of a medical gas (e.g., carbon dioxide, oxygen, nitrous oxide, gas mixture) cylinder to reduce high, variable gas pressure to a lower, constant working pressure. It typically includes a cylinder shut-off switch (i.e., cylinder valve), regulator controls, manometer(s), a refill port, and a safety relief valve to avoid excessive pressure due to increased ambient temperatures. It is intended to be permanently fitted by a manufacturer to the stem of a valveless (i.e., open) empty medical gas cylinder prior to filling.

An assembly of devices designed to be interconnected to administer oxygen (O2) to a patient using various methods of oxygen administration (e.g., face mask, nasal canula) at different concentrations (e.g., via a gas mixer), duration of use, and flows. It will connect to an oxygen source and will typically include a flowmeter or flow controlling device, masks, tubing, valves, and/or nasal cannulae. It can also include, e.g., a high pressure gas reduction valve(s) and a pneumatically-powered suction device with collection bottle.