German phrase
Wann sollen ~ entnommen werden?
Meaning
When should ___ be removed?
When to use it
It asks when to remove them. Polite and calm, often used for drains or other medical devices.
Example dialogue
Wann sollen die Drainagen entnommen werden?
When should the drains be removed?
In zwei Tagen beim Kontrolltermin.
In two days, at the follow-up appointment.