Pain and diminished pulse volume (B) are signs of compartment syndrome, which can progress to complete loss of the peripheral pulse in the extremity. Compartment syndrome occurs when external pressure (usually from a cast), or internal pressure (usually from subcutaneous infused fluid), exceeds capillary perfusion pressure resulting in decreased blood flow to the extremity. (A) should not be pursued until physical causes of the pain are ruled out. (C) is of less priority than determining the effects of the edema on circulation and nerve function. Further assessment of the client's ecchymosis can be delayed until the signs of edema and compression that suggest compartment syndrome have been examined (D).Correct Answer: B