Three days after a patient had abdominal surgery, the nurse notes a 4-cm periwound erythema and swelling at the distal end of the incision. The area is tender and warm to the touch. Staples are intact along the incision, and there is no obvious drainage. Heart rate is 96 beats/min and oral temperature is 100.8°F (38.2°C). The nurse would suspect that the patient has what kind of complication?
Select one of the following: