A 4-year-old boy is brought to the emergency department by his mother. She says he points to his stomach and says, "It hurts so bad." Which pain assessment tool would be the best choice when assessing this child’s pain?

The amount of oxygen that is actually used by the body during the rest or a hand workout is determined by the heart rate, the stroke volume, and the amount of a. blood circulating in the vascular system b. oxygen removed from the vascular system c. oxygen provided to the vascular system d. blood that individual has in the body e. hemoglobin in the red blood cells