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The "Sickbay" on the Enterprise was a medical science marvel, filled with all sorts of fantastic tools with the capability to diagnose virtually any ailment in existence and perform complex surgeries on life-threatened patients with virtually no blood spilled.
While we've got a long way to go until we get the full set of medical tools that was available to Dr. McCoy, quite a few of Trek's medical gizmos have left their influence on real-life healthcare technology.
The magical diagnostic bed that displayed all sorts of metrics on patient vital signs that was used on the original series did eventually come to fruition as various independent diagnostic and health monitoring equipment used in hospitals today.
One of those is the LifeBed, which is a near-dead ringer for Dr. McCoy's sickbay. Similar diagnostic equipment has been used aboard the International Space Station (ISS) and in mobile field hospitals in the military. Naturally, advanced medical imaging technologies inspired by the original series and Next Generation sickbays made their way into CT and MRI equipment, which are a staple of modern medical diagnosis.