A nurse is reporting a client's laboratory tests to the provider to obtain a prescription for the client's daily warfarin. Which of the following laboratory tests should the nurse plan to report to obtain the prescription for the warfarin?

Choice A rationale:

A capillary glucose level of 198 mg/dL in a client receiving total parenteral nutrition (TPN) suggests hyperglycemia, which is a common complication of TPN. TPN solutions are high in glucose, and clients receiving TPN are at risk of developing hyperglycemia. Regular monitoring of blood glucose levels is necessary to detect and manage hyperglycemia promptly.

Choice B rationale:

Serum albumin level of 3.9 g/dL is within the normal range (3.5-5.5 g/dL) and does not indicate a complication of TPN. Low serum albumin levels could suggest malnutrition or liver disease, but in this case, the level is normal.

Choice C rationale:

Hemoglobin (Hgb) level of 15.6 g/dL is within the normal range for both men and women, indicating an adequate oxygen-carrying capacity of the blood. This result does not suggest a complication related to TPN.

Choice D rationale:

White blood cell (WBC) count of 7,000/mm³ is within the normal range (4,500-11,000/mm³) and does not indicate a complication of TPN. Elevated WBC count could suggest an infection, but in this case, the count is normal.

Choice A rationale:

An increase in heart rate by 10 beats per minute when moving from a supine to a sitting position is a normal physiological response to compensate for decreased venous return and maintain cardiac output. This response does not indicate orthostatic hypotension.

Choice B rationale:

An increase in diastolic blood pressure by 10 mm Hg when moving from a supine to a sitting position is a normal response to compensate for the effects of gravity on blood flow. It helps maintain perfusion to vital organs and does not indicate orthostatic hypotension.

Choice C rationale:

Heart palpitations can occur due to various reasons, including anxiety or arrhythmias, but they are not specific signs of orthostatic hypotension. This symptom alone does not confirm the presence of orthostatic hypotension.

Choice D rationale:

A decrease in systolic blood pressure by 25 mm Hg or more when moving from a supine to a sitting position indicates orthostatic hypotension. Orthostatic hypotension is defined as a drop in systolic blood pressure of 20 mm Hg or more or a drop in diastolic blood pressure of 10 mm Hg or more within 3 minutes of standing up. This condition can cause dizziness, lightheadedness, or fainting and can be a side effect of antihypertensive medications or other underlying medical conditions.