TPTEFTime to Peak Tidal Expiratory Flow
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At birth, they examined two respiratory function measures: the ratio of time to peak expiratory flow/expiratory time (TPTEF:TE) and passive respiratory compliance per kg (Crs/kg).
The TPTEF:TE was 10% better in the exposed group (0.383 vs.
The researchers measured the pulmonary function in all newborns at approximately 48 hours of age and found the newborns of smoking women who received Vitamin C supplementation had significantly improved lung function compared with the newborns of smoking women who received a placebo, as measured by standard newborn pulmonary function testing (TPTeF:TE and Crs).