Which of the following regions should a medical assistant use for venipuncture after applying the tourniquet to a patient?

A. Urine specimen volume is 6 mL: A volume of 6 mL is generally sufficient for routine urinalysis, so this would not cause rejection.
B. Urine specimen temperature is 23° C (73.4° F): This temperature is within an acceptable range for a urine specimen that has been properly stored, so it would not cause rejection.
C. Urine specimen container is missing a preservative. Missing a preservative in the container can compromise the integrity of the specimen, leading to rejection.
D. Urine specimen is amber and turbid: Amber color and turbidity may indicate an abnormality, but they are not causes for specimen rejection in routine urinalysis.

Correct answer: A
A. Ensure the otoscope is in the room. Ensuring that the otoscope and other necessary equipment are in the room is an important step in preparing the room for a physical examination.
B. Replace the half-full sharps containers. Sharps containers should be replaced when they are three-quarters full, not necessarily when they are half-full. This action, while important, is not specific to preparing for a general physical examination.
C. Obtain preauthorization from insurance. Preauthorization is an administrative task that is not directly related to preparing an examination room.
D. Sterilize counter surfaces in the room. Cleaning and disinfecting counter surfaces is important for infection control but typically would have been done after the last patient. This action is less directly related to preparing for a general physical exam compared to ensuring the necessary equipment is present.