title: A comparative study of early postoperative hypoxemia in infants, children, and adults undergoing elective plastic surgery.
abstract: To determine the influence of age on postoperative hypoxemia, we studied postoperative hypoxemia in 1152 patients, from infants to adults, ASA physical status I, undergoing elective plastic surgery. Subjects were divided into four groups on the basis of age: Group 1, infants aged 1 yr or less (n = 108); Group 2, children aged 1-3 yr (n = 240); Group 3, children aged 3-14 yr (n = 482); and Group 4, adults aged 14-58 yr (n = 322). Arterial oxygen saturation (Spo2) levels were recorded while patients were breathing room air in the postanesthesia recovery room shortly after arrival (0 min), and 5, 10, 15, 20, 30, 40, 50, 60, 120, and 180 min thereafter. Younger patients showed lower Spo2 levels and a higher incidence of hypoxemia during the early postoperative period. The incidences of hypoxemia (Spo2 = 86%-90%) and severe hypoxemia (Spo2 < or = 85%) in the recovery room were 30.6% and 16.7%, respectively, in Group 1, 20.0% and 10.0% in Group 2, 14.1% and 3.3% in Group 3, and 7.8% and 0.6% in Group 4. Hypoxemia occurred most commonly within 1 h after anesthesia, particularly during the first 40 min in infants and during the first 15 min in older children and adults. A significant correlation was found by linear regression analysis between low Spo2 levels on admission to the recovery room and children's age. Thereafter, Spo2 levels and the incidence of hypoxemia during the early postoperative period were related only to infants' recovery scores.
authors.affiliation: Department of Anesthesiology, Plastic Surgery Hospital, Chinese Academy of Medical Sciences, Beijing, People's Republic of China.
authors.forename: F S
authors.initials: FS
authors.lastname: Xue
authors.forename: Y G
authors.initials: YG
authors.lastname: Huang
authors.forename: S Y
authors.initials: SY
authors.lastname: Tong
authors.forename: Q H
authors.initials: QH
authors.lastname: Liu
authors.forename: X
authors.initials: X
authors.lastname: Liao
authors.forename: G
authors.initials: G
authors.lastname: An
authors.forename: L K
authors.initials: LK
authors.lastname: Luo
authors.forename: X M
authors.initials: XM
authors.lastname: Deng
mesh_terms: D000293:Adolescent; D000328:Adult; D000367:Age Factors; D000402:Airway Obstruction / Q000209:etiology; D000762:Anesthesia Recovery Period; D002648:Child; D002675:Child, Preschool; D017558:Elective Surgical Procedures; D005500:Follow-Up Studies; D006801:Humans; D007035:Hypothermia / Q000209:etiology; D000860:Hypoxia / Q000097:blood / Q000209:etiology*; D015994:Incidence; D007223:Infant; D016014:Linear Models; D008875:Middle Aged; D010100:Oxygen / Q000097:blood; D011183:Postoperative Complications; D013518:Surgery, Plastic
chemical_list: D010100:Oxygen