Due to changes in medical knowledge, plenty of 'tools' used in medical practices have fallen into disuse because the underlying medical theory has been dis-proven.
As an example, I present to you the Tobacco smoke enema device. How many of these do you think are still in use today? Do you really want tobacco smoke blown up your backside when you just have been pulled out of the water with a set of bellows and a pipe? Yet in the 17th and 18th centuries they hung these things all along the river Thames to help 'warm' people just pulled out of the water.