De or het darmperforatie?

The correct Dutch article is:

de darmperforatie

Rule Words ending in -tie and -sie: almost always de. See the rule

How to use darmperforatie

the darmperforatiede darmperforatie
this darmperforatiedeze darmperforatie
that darmperforatiedie darmperforatie
our darmperforatieonze darmperforatie
your darmperforatiejouw darmperforatie
every darmperforatieelke darmperforatie
which darmperforatie?welke darmperforatie?
a big darmperforatie / the big darmperforatieeen grote darmperforatie, de grote darmperforatie