FRC in an adult is about 70 mL/kg and is about 18 mL/kg in the infant. The larger the FRC, the bigger the oxygen tank and the more respiratory reserve. A 2.7-kg infant’s TV is only about 22 mL.įunctional residual capacity (FRC), the amount of air left in the lung after a normal exhalation, effectively acts as the lung’s oxygen tank. Regardless of age, a normal resting tidal volume (TV) is about 8 mL/kg of lean body weight. Surface area varies from 2.8 m2 in the infant (about the size of a baby blanket) to 75 m2 in the adult (about half a tennis court). Full-term infants are born with 20 million to 50 million alveoli, about 10% of the 200 million to 500 million found in the adult-giving them about 26 times less area for gas exchange. The infant metabolic rate is roughly double the adult rate. An Infant Can’t Hold His Breath As Long as an Adult Infants and young children have little respiratory reserve and can develop respiratory failure and hypoxemia quickly when they are ill. Babies and Small Children Get Hypoxic Very Easily
0 Comments
Leave a Reply. |
AuthorWrite something about yourself. No need to be fancy, just an overview. ArchivesCategories |