Final Answer:
Regarding phlebotomy and the total body blood volume of infants, it is true that infants have a smaller blood volume relative to body weight, and care must be taken to avoid excessive blood loss during phlebotomy. Option B is the answer.
Step-by-step explanation:
Infants have a higher blood volume per unit of body weight compared to adults. Neonates typically have about 85 to 90 ml of blood per kilogram of body weight, whereas adults have around 70 ml/kg. Due to their smaller size, even a small volume of blood loss can have a more significant impact on infants.
When performing phlebotomy on infants, it's crucial to consider their total blood volume to prevent complications such as hypovolemia. Specialized techniques and equipment designed for pediatric phlebotomy are employed to minimize the risk of excessive blood loss.
Option B (Infants have a smaller blood volume relative to body weight, and care must be taken to avoid excessive blood loss during phlebotomy) is the answer.