![]() With a 75% smaller oxygen tank, the infant can’t hold his breath as long as an adult.ĭead space is also higher in the infant (3 compared with 2 mL/kg in the adult). 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 |