A<unk> , a type generally known as a variable-area<unk> s, or a rotameter, is an instrument used to directly measure the flow rate of a gas in medical instruments. It consists of a connection to a gas source, a needle valve opened and closed by turning an attached dial for control of flow rate, a float resting in a clear tapered<unk> , and an outlet port. It is primarily used in health care institutions during delivery of medical gases, often in conjunction with other devices such as pressure gauges or pressure reducing valves.
Thorpe tube flowmeter
Carbon dioxide angiography
Plethysmograph
Intravascular fluorescence
Lung float test
CO-oximeter
Alveolar gas equation
Respiratory pressure meter