Which of the following is an indication of poor perfusion in a child?

Cyanosis or cool skin serves as a significant indication of poor perfusion in a child. When the body's tissues do not receive adequate blood flow and oxygen, a condition known as poor perfusion occurs. This can lead to the skin taking on a bluish tint, especially in the lips, face, and extremities, known as cyanosis. Additionally, the skin may feel cool to the touch due to reduced blood flow.

Warm extremities, in contrast, typically indicate that the body is effectively circulating blood, resulting in a healthy supply of warmth to the skin. A rapid pulse may be observed in various situations, but it does not solely indicate poor perfusion; it can also occur due to stress, fever, or increased activity. Strong pulses suggest that blood is being pumped effectively, which is the opposite of poor perfusion. Thus, the combination of cyanosis and cool skin directly reflects inadequate perfusion and oxygen delivery to vital areas of the body.