Effects of the First Spontaneous Breathing Trial in Children With Tracheostomy and Long-Term Mechanical Ventilation.

Background: Weaning and liberation from mechanical ventilation in pediatric patients with tracheostomy and long-term mechanical ventilation constitute a challenging process due to diagnosis heterogeneity and significant variability in the clinical condition. We aimed to evaluate the physiological response during the first attempt of a spontaneous breathing trial (SBT) and to compare variables in subjects who failed or passed the SBT.

Methods: This was a prospective observational study in tracheostomized children with long-term mechanical ventilation admitted to the Hospital Josefina Martinez, Santiago, Chile, between 2014-2020.

Sex-Differences in the Oxygenation Levels of Intercostal and Vastus Lateralis Muscles During Incremental Exercise.

This study aimed to examine sex differences in oxygen saturation in respiratory (SmO-) and locomotor muscles (SmO-) while performing physical exercise. Twenty-five (12 women) healthy and physically active participants were evaluated during an incremental test with a cycle ergometer, while ventilatory variables [lung ventilation ( E), tidal volume (Vt), and respiratory rate (RR)] were acquired through the breath-by-breath method. SmO was acquired using the MOXY devices on the and .

Intercostal Muscles Oxygenation and Breathing Pattern during Exercise in Competitive Marathon Runners.

The study aimed to evaluate the association between the changes in ventilatory variables (tidal volume (Vt), respiratory rate (RR) and lung ventilation (V.E)) and deoxygenation of (∆SmO-) during a maximal incremental exercise in 19 male high-level competitive marathon runners. The ventilatory variables and oxygen consumption (V.