During an assessment, which symptom would most likely indicate a serious complication for a patient with a cast?

Increased pain and warmth in the casted area can indicate serious complications, such as compartment syndrome or an infection. Compartment syndrome occurs when there is increased pressure within a closed muscle compartment, leading to decreased blood flow and potential tissue damage. Symptoms such as severe pain that is disproportionate to the injury, warmth, and swelling are red flags that necessitate immediate medical evaluation.

Additionally, the presence of increased warmth in conjunction with heightened pain may suggest an infection or other inflammatory process, which can also arise in patients with casts. If these symptoms are ignored, they may lead to significant complications, including permanent impairment or the need for surgical intervention.

In contrast, the absence of discomfort, elimination of swelling, and improved range of motion are generally signs of recovery and healing. These options would not indicate a serious complication; rather, they suggest that the treatment is proceeding as expected.