Preparing for a knee replacement operation

A knee replacement is an operation in which your knee joint is replaced with an artificial joint.

There are two main types of anaesthetic given for this type of surgery:

general anaesthetic – anaesthetic drugs make you unconscious, so you are completely unaware throughout your operation.
spinal anaesthetic – the lower half of your body is numbed by an injection in your lower back. This can be given alone, with sedation (medicine to relax you) or in addition to a general anaesthetic to help with pain relief after the operation. A nerve block might also be used to reduce pain after surgery.