A nurse is setting up a sterile field prior to performing a dressing change. Which of the following actions should the nurse take?

• Muscle guarding: Muscle guarding is a classic sign of peritoneal irritation, most commonly seen in acute appendicitis. Rebound tenderness and right lower quadrant pain strongly support inflammation of the appendix. Guarding occurs as the abdominal muscles contract to protect inflamed underlying tissue. It is not typically associated with celiac disease and is less characteristic of uncomplicated diverticulitis.
• Increased temperature: Fever reflects an inflammatory or infectious process and is commonly seen in appendicitis and diverticulitis. Both conditions involve localized infection that can progress if untreated. The client’s rising temperature supports acute abdominal inflammation. Celiac disease is an autoimmune condition and does not usually present with fever.
• Nausea and vomiting: Nausea and vomiting frequently accompany appendicitis due to visceral irritation and inflammation. These symptoms can also occur in diverticulitis as a result of bowel inflammation and decreased motility. In contrast, celiac disease more commonly presents with chronic diarrhea and malabsorption rather than acute vomiting.
• Abdominal pain: Abdominal pain is present in all three conditions but differs in character and location. Appendicitis typically causes right lower quadrant pain, while diverticulitis often presents with left lower quadrant pain. Celiac disease can cause diffuse abdominal discomfort related to gluten exposure and malabsorption.
• Elevated WBC count: An elevated white blood cell count indicates an acute inflammatory or infectious process, which is characteristic of appendicitis and diverticulitis. Leukocytosis reflects the body’s immune response to bacterial infection or tissue inflammation. Celiac disease does not typically cause leukocytosis because it is a chronic autoimmune condition rather than an acute infection.

A. The client's foot feels cooler than in the previous assessment: A cooler extremity following vascular surgery can indicate decreased perfusion, but temperature alone is a subjective and late indicator. It must be interpreted in conjunction with pulses, capillary refill, color, and pain. While concerning, it does not provide definitive evidence of acute graft compromise by itself.

B. The client's pedal pulse in the right foot is not palpable: Absence of a distal pedal pulse following a femoropopliteal bypass graft raises immediate concern for graft occlusion or acute arterial thrombosis. Patency of the graft is essential to restore blood flow to the lower extremity, and loss of pulse indicates potential ischemia.

C. The client's capillary refill time is 5 seconds in the toes: A prolonged capillary refill suggests impaired peripheral perfusion, but it is less specific than pulse assessment. Capillary refill can be influenced by environmental temperature and vasoconstriction. While abnormal, it is not as critical as the absence of a palpable pulse in evaluating graft function.

D. The client reports a pain level of 8 on a scale from 0 to 10: Postoperative pain is expected after a vascular surgical procedure and may be significant. However, pain must be correlated with other ischemic signs such as pulselessness, pallor, paresthesia, and paralysis to determine severity. Severe pain alone, without objective perfusion deficits, is not the most urgent finding.