Complete glottic closure during central XXXX in @entity742 .

@entity2417 @entity742 @entity386
OBJECTIVE: The objectives of this study were threefold: to document complete glottic closure during artificially induced central @entity386 in @entity742 ; to unequivocally confirm that thyroarytenoid muscle electrical activity during @entity2417 in @entity742 reflects complete glottic closure; and to evaluate the physiologic significance of this phenomenon in artificially induced @entity2417 in @entity742 . METHODS: We recorded thyroarytenoid (TA) muscle EMG, subglottic pressure, and lung volume simultaneously with direct endoscopic vision of the glottis from beneath on nine 11- to 15-day-old @entity742 during artificially induced @entity2417 . RESULTS: Thirty-eight @entity2417 were induced. Complete glottic closure was present on 35/38 (92%) of these @entity386 . Complete glottic closure was always paralleled by thyroarytenoid muscle electromyogram (EMG) activity (35/38). In no instance was TA EMG recorded without complete glottic closure. Moreover, positive subglottic pressure and maintenance of lung volume above functional residual capacity were observed in 27/30 (90%) and 18/19 (95%), respectively, of these @entity386 where complete glottic closure was present. CONCLUSIONS: Complete glottic closure is present throughout most artificially induced @entity2417 in @entity742 . Complete glottic closure is paralleled by TA EMG in artificially induced @entity2417 . Thyroarytenoid muscle electromyographic activity is a reliable way to document complete glottic closure during @entity386 , especially in the presence of positive subglottic pressure. These observations suggest that complete glottic closure could be a physiologic mechanism aimed at maintaining higher lung volumes to improve gas exchange during @entity2417 .
