A patient who ingests several alcoholic beverages each day has been taking 1 gm of acetaminophen (Tylenol) six times a day and Percocet for pain relief following knee surgery. The patient is currently complaining of nausea with right upper quadrant pain and has an AST of 60 units/L and ALT of 45 units/L. Which additional laboratory studies should the nurse use when assessing this patient? Select all that apply.
Note: Credit will be given only if all correct choices and no incorrect choices are selected.
◦ Serum potassium to evaluate kidney function
◦ Toxicology screen to identify other substances ingested
◦ Serum acetaminophen level plotted on a Rumack-Matthew nomogram
◦ Prothrombin time and INR to identify coagulation abnormalities
◦ Urine screen for myoglobin to detect tissue damage