Learn Swedish: Läkaren kontrollerar ditt blodprov innan hon utför ingreppet. - The doctor checks your blood test before she performs the procedure.

In strict formal Swedish, innan is a conjunction used to introduce a full subordinate clause that has its own subject and verb (hon utför). Före is a preposition, so it should only be used directly before a noun phrase. If we dropped the subject and verb here, we would use the preposition instead: före ingreppet (before the procedure).

If we wanted to add the word inte to the second half of the sentence, where would it go?

It would go before the verb: innan hon inte utför ingreppet. Because innan introduces a subordinate clause, Swedish applies the BIFF rule. This rule means that in a subordinate clause, sentence adverbs like inte, ofta, or alltid must be placed before the conjugated verb, which is the opposite of how main clauses work.

Could I use the common verb kollar instead of kontrollerar here?

You could in casual speech, but kontrollerar is much better suited for a professional medical context. Kollar is highly informal, while kontrollerar carries the appropriate weight of formally inspecting, verifying, or carefully checking something important.

What specific kind of procedure does ingreppet refer to?