A nurse is collecting data from a client who has hyperparathyroidism and is receiving 0.9% sodium chloride via IV infusion. Which of the following manifestations should the nurse identify as an adverse effect of the treatment?

Rationale:

A. Ecchymosis on the inner left thigh: Bruising can occur as a result of trauma or surgery and is expected after cast placement. While it should be monitored, it is not the most urgent concern unless it worsens or is accompanied by signs of active bleeding or compartment syndrome.

B. Diminished pulses on the affected extremity: Reduced or absent pulses indicate compromised circulation, which may be a sign of compartment syndrome or vascular injury. This is the highest priority because it threatens tissue viability and requires immediate intervention to prevent permanent damage.

C. One fingerbreadth of space between the cast and the skin: This indicates appropriate cast fit and allows for some swelling. It is not a cause for concern and confirms that the cast is not overly tight, helping to prevent pressure injuries or circulatory compromise.

D. Client report of muscle spasms of the left leg: Muscle spasms can occur from immobilization or injury and may cause discomfort, but they do not immediately endanger the limb. Pain relief and repositioning may help, but this is not the priority over vascular assessment.

Rationale:

A. New onset of hearing loss: Hearing loss is not a typical adverse effect of 0.9% sodium chloride infusion. It may occur with high-dose loop diuretics like furosemide but is unrelated to isotonic fluid administration or hyperparathyroidism management.

B. Kussmaul respirations: These are deep, rapid respirations seen in metabolic acidosis, particularly diabetic ketoacidosis. They are not associated with isotonic fluid infusion or calcium disturbances in hyperparathyroidism.

C. Hyperthermia: Elevated body temperature is not linked to 0.9% sodium chloride infusion. Hyperthermia may occur with infections or neurologic injury, but not as a direct consequence of isotonic fluid therapy.

D. Chvostek's sign: Chvostek's sign is a clinical indicator of hypocalcemia, which can occur as an adverse effect of 0.9% sodium chloride infusion in clients with hyperparathyroidism. Large volumes of saline increase calcium excretion, potentially leading to low serum calcium levels.