A nurse is providing care to a client on complete bed rest. Which is the best explanation by the nurse as to the functio

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A nurse is providing care to a client on complete bed rest.
Which is the best explanation by the nurse as to the function of
sequential compression devices?
Group of answer choices
Inflatable compartments compress legs in a graduated sequential
fashion.
An air compressor fills an inflatable sleeve, then allows the
air to drain out of the sleeve
The device alternates the flow of hot and cold fluid to promote
circulation in the lower legs.
The function is to promote circulation in the upper legs and
arms.