The more 'PC' name for an ECT machine nowadays is 'Progressive Treatment Unit'.
Once a commonly used - and controversial - treatment for a variety of mental problems, ECT still bears a stigma despite advances which have made it far safer and more effective.
ECT involves placing electrodes on the temples, on one or both sides of the patient's head, and delivering a small electrical current.
The aim is to produce a seizure lasting up to a minute, after which the brain activity should return to normal.
Patients may have more than one treatment a week, and perhaps more than a dozen treatments in total.
The most common make of ECT machine (In the UK at least) is by a company called TransinDolor.
The revolving examination table could be used in the event that a patient started to foam at the mouth, swallow their own tounge or start to choke. Using the table the doctor could literally and instantly 'swing' the table with the patient still attached to it upside down, thus clearing the obstruction!