A universal medical device
A medical pod is as its name suggest a pod, it is used to hold a patient and repair them in a 'mobile' sterile environment. Inside there are mechanical arms holding numerous apparatus and is often filled with a medical solution. Sometimes this solution is breathable, often times not.
In the pod a patient can be put in a medical coma.
Here, the bots use Medical Pods designed for their bio-mechanical natures. Inside the medical solution is molten liquid Promethium, mixed with Engen to create Cyberplasm that is mixed with Nano-Genes (medical nano bots).
Varies, as expected, to species and manufacturer, but its is always a pod