The nurse is attempting to interpret the arterial blood gas results of an adult male patient with metabolic acidosis who has a bicarbonate (HCO3-) level of 18. Using the Winter formula, determine the expected pCO2 that would indicate this patient is compensating for the metabolic acidosis. Enter your answer using a whole number.

The 23-year-old patient is brought to the emergency department after contacting emergency services to report profound weakness that started in his feet and worsened and spread cranially over the past few days. He reports severe diarrhea after a camping trip a week ago. Upon assessment, strength, sensation, and deep tendon reflexes are significantly reduced, with the lower extremities more severely affected than his upper extremities. Vital signs are normal and the patient seems to be breathing well. The nurse anticipates which finding on the lumbar puncture result?  

A patient’s fasting plasma glucose level is 130 mg/dL and the 2-hour oral glucose tolerance test is 185 mg/dL. What is the next step in the workup for diabetes mellitus for this patient?