。
I had an enema.
Literal
Enema [object-を] did.
A blunt medical statement. 浣腸 (かんちょう) is 'enema' as a medical procedure. Note: カンチョー written in katakana has become famous as a childish prank (poking fingers at someone's backside) — same reading, but the katakana form signals the prank meaning. Here the kanji form means the medical procedure. ~をする is the standard 'to perform X' verb phrase.