Problem: After receiving chemotherapy 2 weeks ago, a male client with acute leukemia is admitted for blood transfusions because his hemoglobin is 6 gm/dl. After toileting, the client returns to bed and his oxygen saturation is measured at 82%. The nurse increases the O2 per nasal cannula from 3 to 4 liters per minute. What intervention should the nurse implement next? Collect blood for hemoglobin and hematocrit. Start the first transfusion of blood. Insert an indwelling urinary catheter. Encourage alternate rest periods with activity.