Applied Phlebotinum that makes them heal with shocking speed. People in them tend to be naked or barely clothed, to show how badly they're wounded and to absorb all the healing juices. Subtrope of both Auto Doc and People Jars. Related to Panacea and Healing Potion. May involve Nano Machines.
Examples:Anime and Manga
- These are used in Dragon Ball by Frieza's minions.
- These kind of devices appear on the Birdy the Mighty franchise (and considering that the titular protagonist is prone to get into fights as befits her Superhero status, she ends up using them rather often).
- These are located in Fairy Tail used by Tartarus to revive and create new demons .
- In the Batman mythos, Ras al'Ghul has a place called the Lazarus Pit that regenerates and rejuvenates him. (It also causes temporary insanity...)
- The obscure Marvel Comics vigilante/ Spider-Man villain, Solo heals himself after getting wounded in battle by bathing in a weird tank of green fluid.
- Judge Dredd has speedheal machines, which allow the human regenerative system to speed up.
- Star Wars has bacta tanks, using the universal regenerative fluid containing some sort of microbe. Most famously used with Luke in The Empire Strikes Back.
- Such tanks are used in Starship Troopers to heal wounded soldiers, such as when Rico gets his thigh bitten through by a bug.
- In Wanted they use vats filled with paraffin wax. It's said to "stimulate white bloodcells and speeds up the process". Wounds that normally takes days to heal do so in hours.
- In the Paradox series the Chatcaava use a sort of gel to recover from wounds sustained in duels. Alliance ambassador Lisinthir spends a few days in a tank full of it after one fight with the emperor (who had to have his digestive tract re-inserted and was back on his feet that evening.)
- These show up in the Tour of the Merrimack novels
- Used in Orson Scott Card's novel Hot Sleep (it's an inversion of the cold sleep trope, not a sexual reference) when the protagonist is being healed/reconstructed after "proving he's a survivor".
- Iliff in the Agent of Vega series by James H Schmitz delivers his final report from a healing vat, after his near-fatal confrontation with the Big Bad of the story.
- Eclipse Phase has healing vats, one of the first uses of nanotechnology. Given a few days they can regenerate limbs, and given a few weeks can grant a severed head a new body.
- Kolto tanks (precursors to the bacta ones) appear throughout the Knights of the Old Republic series. In the first game, an entire main story quest revolves around not cutting off the Republic's supply of them. The Player Character of the second game even wakes up inside one at the start of the game.
- Kolto tanks appear again in Star Wars: The Old Republic. Imperial characters get more than one Side Quest involving their destruction (in the Republic camps, of course)—often with wounded soldiers still inside.
- Shadow the Hedgehog has a few levels with tanks that can heal wounded soldiers. One level even has a mission that revolves around this.
- Bravely Default has the White Magic Circulation Hub for Eternian Central Command. Victoria F. Stein experiences its treatments regularly.
- Lambda-11 from BlazBlue tends to spend her time between missions in one after being rebuilt by Kokonoe, due to her decrepit state. This isn't always a good thing though, as Kokonoe has to give her a fair few questionable surgical operations and memory wipes to get her back into fighting shape.
- Played with in Sluggy Freelance, a strip after Torg gets hit with a load of "sleep chaff" shows him in what looks like a bacta tank, then Riff states that it's actually a "bactine" tank and the only reason they can't hear him screaming is the breath mask.
- When Spinnerette's powers are going critical she wakes up in one of these in Dr. Universe's lab, and smashes it open in a panic. Causing Universe to wonder about the practicality of such things.
- Most cloning rigs in Schlock Mercenary are giant tanks of water with Nano Machines that rebuild the patient's missing parts, which tend to be everything but the head.
- In the alien-related continuities of the Walkyverse, Martian resurrection technology consists of a tank in which a corpse is kept, which when plugged into the device causes it to regenerate fully and then return to life.
- Ballerina Mafia shows Joel making frequent use of a Nanobot healing tube.
- Danny Phantom was put in one after crash-landing on the yeti world.
- Vilgax of Ben10 spends most of the first season inside one after the vessel carrying the Omnitrix caused his ship's bridge to explode with its counterattack.