Which of the following is the most common substance found on analysis of a renal stone?

A. Malignant hypothermia: This is a rare but life-threatening reaction to certain medications used during anesthesia. It doesn't typically manifest with calf edema.

B. Pulmonary embolism: While pulmonary embolism can occur as a complication in some cases, it is characterized by symptoms like sudden shortness of breath, chest pain, and may not directly cause calf edema.

C. Acute compartment syndrome
Increasing edema in the calf of a client with multiple fractures of the leg is a manifestation of acute compartment syndrome. Acute compartment syndrome occurs when there is increased pressure within a muscle compartment, which can lead to reduced blood flow, nerve damage, and tissue hypoxia. The edema and increased pressure can compress blood vessels, nerves, and muscle tissue within the compartment, resulting in symptoms such as severe pain, edema, and potential vascular compromise.

D. Fat embolism syndrome: This syndrome can occur in clients with long bone fractures, but it is characterized by respiratory and neurologic symptoms, not isolated calf edema.

A. Performing range of motion:
Explanation: Range of motion exercises are important for preventing joint stiffness and muscle atrophy, especially in clients with casts. However, this is not the first priority. Ensuring adequate circulation and perfusion is crucial before initiating any exercises or movements, as compromised circulation could lead to serious complications.

B. Managing pain:
Explanation: Pain management is important for the client's comfort, but it is not the first priority in this context. Assessing circulation and ensuring there are no signs of compromised perfusion takes precedence. Pain management can follow once circulation has been confirmed as adequate.

C. Checking capillary refill:
Explanation: Checking capillary refill is the first priority when assessing a client with a cast. Capillary refill assesses peripheral circulation by pressing on the nail bed and observing how quickly color returns. Delayed capillary refill could indicate compromised blood flow, which is a serious concern and requires immediate intervention.

D. Discussing cast care:
Explanation: Educating the client about cast care is important, but it is not the first priority. Ensuring proper circulation and ruling out any signs of impaired perfusion must be addressed before discussing cast care instructions.