A nurse is caring for a client who is receiving a continuous heparin infusion. Which of the following laboratory tests should the nurse review prior to adjusting the client's heparin?

- A. This choice is incorrect because the body temperature does not drop 1 degree 1 week after ovulation. The body temperature rises slightly (about 0.4 to 0.8 degrees Fahrenheit) after ovulation and remains elevated until the next menstrual period.

- B. This choice is incorrect because the body temperature should be taken each morning before getting out of bed or doing any activity. Taking the temperature in the evening can result in inaccurate readings due to variations in daily activities, meals, stress, exercise, etc.

- C. This choice is correct because the body temperature might decrease slightly (about 0.2 degrees Fahrenheit) just prior to ovulation due to a surge in estrogen levels. This dip in temperature can indicate that ovulation is about to occur and that the client should avoid unprotected intercourse if she wants to prevent pregnancy.

- D. This choice is incorrect because the body temperature is not at its highest during menstruation. The body temperature drops at the onset of menstruation due to a decline in progesterone levels and marks the beginning of a new cycle.

- A. Calories is incorrect. Clients with Crohn's disease and enteroenteric fistula need adequate calories to prevent malnutrition and weight loss due to inflammation, malabsorption, and increased metabolic rate.

- B. Protein is incorrect. Clients with Crohn's disease and enteroenteric fistula need adequate protein to promote tissue healing and prevent protein-losing enteropathy.

- C. Potassium is incorrect. Clients with Crohn's disease and enteroenteric fistula are at risk of hypokalemia due to diarrhea, vomiting, and fistula drainage. They need to increase their potassium intake to prevent electrolyte imbalance and cardiac complications.

- D. Fiber is correct. Clients with Crohn's disease and enteroenteric fistula should decrease their fiber intake to reduce intestinal motility, bulk, and gas production, which can worsen the inflammation and fistula formation.