The Nurse Is Preparing to Test a Patient for Postvoid

The nurse is preparing to test a patient for postvoid residual with a bladder scan. Which action will the nurse take?

A) Measure bladder before the patient voids.
B) Measure bladder within 10 minutes after the patient voids.
C) Measure bladder with head of bed raised to 60 degrees.
D) Measure bladder with head of bed raised to 90 degrees.