How long does a portable liquid oxygen tank typically last?

A portable liquid oxygen tank typically lasts about 2-3 hours when used continuously. This duration can vary based on factors such as the flow rate settings and the individual patient’s needs. Many patients using these tanks require them to support daily activities and mobility, making it crucial for users to understand their tank's capacity. While some portable tanks may last longer under certain conditions, the common expectation is around 2-3 hours of effective use.

The other options reflect less commonly observed durations for portable liquid oxygen tanks when considering average flow rates and typical usage scenarios.