Airway pressures during crying in healthy infants.
Maximal inspiratory and expiratory airway pressures (PI max and PE max) were measured in 100 healthy infants (51 males, 49 females; age range, 0.06-3.76 years) by occluding the airway with a suitable face mask during a crying effort. Mean values +/- SD for PI max and PE max were 118 +/- 21 cm H2O and 125 +/- 35 cm H2O, respectively. Maximal inspiratory pressure was independent of age, sex, and anthropometrics, while maximal expiratory pressure showed a low but statistically significant positive correlation with body weight (P less than 0.001).
Shardonofsky
F R
FR
Meakins-Christie Laboratories, McGill University, Montreal, Canada.
Perez-Chada
D
D
Carmuega
E
E
Milic-Emili
J
J
D000367:Age Factors; D000886:Anthropometry; D001835:Body Weight; D002675:Child, Preschool; D003448:Crying / Q000502:physiology*; D005260:Female; D006801:Humans; D007223:Infant; D007321:Inspiratory Reserve Volume; D008170:Lung Compliance; D008297:Male; D012123:Pulmonary Ventilation; D012132:Respiratory Muscles / Q000033:anatomy & histology; D012737:Sex Factors