In the UK selurgery has 2 meanings.

The common medical one. And a general alteration.

This means MPs and parliment have applied the term to the time our representatives spend gaining input from voters in theiir constituancy.

At the time when the pisition was more regal. IE lords and land owners. It allowed the lords to hear requests for alterations on how they managed the constituancy.

Now its more about a meeting where MPs hear from indevidual voters about issues they can help with.