Complex sentence: Before surgery, a polysomnography with a palatal plate in place is needed; this may predict the postoperative situation and gives insight on the chance of the presence of sleep apnea (OSAS) after the operation.
Split into simpler sentences: Before surgery, a polysomnography with a palatal plate in place is needed. This may predict the postoperative situation and gives insight on the chance of the presence of sleep apnea (OSAS) after the operation.