Which unit is used for measuring cylinder pressure in these calculations?

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Multiple Choice

Which unit is used for measuring cylinder pressure in these calculations?

Cylinder pressure is expressed in pounds per square inch (psi) because the gauges on clinical gas cylinders are calibrated in psi, and most calculations and reference charts you’ll use assume that unit. This keeps the numbers aligned with the equipment readings you see in practice—for example, a full oxygen cylinder is read around 2000–2200 psi, and the pressure drops as gas is used. Using psi avoids extra conversions and potential errors that would come from converting to other units like kPa, atm, or bar. So for these calculations, psi is the standard unit to use.

Cylinder pressure is expressed in pounds per square inch (psi) because the gauges on clinical gas cylinders are calibrated in psi, and most calculations and reference charts you’ll use assume that unit. This keeps the numbers aligned with the equipment readings you see in practice—for example, a full oxygen cylinder is read around 2000–2200 psi, and the pressure drops as gas is used. Using psi avoids extra conversions and potential errors that would come from converting to other units like kPa, atm, or bar. So for these calculations, psi is the standard unit to use.

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