expenders

Example:In contrast to exchangers, restrictors may be used in burn victims to prevent excess air from causing further injuries.

Definition:Devices that limit the flow or use of air, often the opposite of exchanger devices which provide additional oxygen.

Example:Decreasers would be used to lower the oxygen levels in a sealed chamber, such as a decompression chamber for divers.

Definition:Terms indicating a reduction in something, typically opposite to the function of exchangers which increase or maintain air or oxygen levels.