Decompression chamber
The decompression chamber, also known as a pressure chamber or gravity chamber, was a standard-equipment chamber located in the medical lab on board  starships. It was designed to treat illnesses caused by decompression sickness, such as that suffered by crewmen exposed to explosive decompression and the vacuum of space. The atmospheric pressure in the chamber was measured by inches of mercury.

The decompression chamber aboard the  saw other uses as well. In 2267, Khan Noonien Singh used the Enterprises decompression chamber to torture Captain James T. Kirk and attempt to induce the rest of the senior staff to join his cause. ()

In 2269, Doctor Leonard McCoy and Mr. Spock used the chamber on Mira Romaine to force the invading Zetarian entities from her body after they had possessed her. ()

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de:Dekompressionskammer
Medical equipment