My partner, Julie, came home yesterday, after having laparoscopic surgery on Saturday. There were some difficulties due to inflamation and a good number (12) of stones which resulted in her requiring a drain fitted and an extra nights hospitalisation.
Despite that she's up and about today, albeit very gingerly, and looking well on the road to recovery.
It will be several weeks before she returns to work and she has a mountain of medication but, so far, things are looking up.
Jeffp is dead right about the trapped air!
Good luck with your op' Mudlark.

C-flat.