After radiation treatment, a client reports dryness, redness, and scaling of his skin occurring within the designated radiation treatment markings. The nurse should instruct the client to take which of the following actions?

A. Hypotension: Hypotension is a common sign of hemorrhage. It occurs due to significant blood loss leading to decreased circulating blood volume and reduced cardiac output, which in turn lowers blood pressure. In the context of postoperative care, hypotension is a critical sign that may indicate internal bleeding.

B. Diaphoresis: Diaphoresis (excessive sweating) can be an autonomic response to acute blood loss and shock. The body tries to compensate for reduced blood volume and pressure by activating the sympathetic nervous system, which results in sweating as part of the body's effort to maintain perfusion to vital organs.

C. Tachypnea: Tachypnea (rapid breathing) is a compensatory mechanism in response to decreased oxygen delivery due to blood loss. The body increases respiratory rate to improve oxygen uptake and delivery to tissues, which is vital when there is reduced blood volume from hemorrhage.

D. Bradycardia: Bradycardia (slow heart rate) is not typically associated with hemorrhage. Instead, hemorrhage usually causes tachycardia (rapid heart rate) as the body attempts to maintain cardiac output and compensate for the loss of blood volume. Bradycardia could indicate other issues such as increased intracranial pressure or a vagal response but is not a common sign of acute hemorrhage.

E. Diarrhea: Diarrhea is not a sign of hemorrhage. It is more commonly associated with gastrointestinal issues such as infections, inflammatory bowel diseases, or reactions to medications. Hemorrhage typically affects cardiovascular parameters rather than causing gastrointestinal symptoms like diarrhea.

A. D-dimer blood test - A D-dimer test measures clot breakdown products in the blood. Elevated levels suggest the presence of an abnormal blood clot, such as in PE, although it is not specific.

B. Complete blood count (CBC) - A CBC is not typically used to diagnose PE. It may be ordered to check for other conditions or as part of the overall health assessment, but it doesn't confirm PE.

C. CT scan - A CT pulmonary angiography is the gold standard for diagnosing PE. It provides detailed images of the blood vessels in the lungs.

D. Chest x-ray - A chest x-ray is not diagnostic for PE. It is often performed to rule out other causes of the client’s symptoms (e.g., pneumonia, pneumothorax) but does not confirm the presence of a pulmonary embolism.

E. Lung ventilation and perfusion scan (VQ scan)
A VQ scan is another diagnostic tool for PE, especially in clients who cannot tolerate contrast dye required for CT scans. It assesses the ventilation and perfusion of the lungs and identifies mismatches suggestive of PE.