Airway pressure-time (P-t) curve and stress index (SI) assessment have been proposed to guide the mechanical ventilation settings and minimize ventilator-induced lung injury.
The stress index (SI), which has been proposed to guide the mechanical ventilation settings and minimize ventilator-induced lung injury. It reflects the change of respiratory compliance during inspiration. Value of SI equals to 1 that indicates a constant compliance, whereas values lower and higher than 1 indicate increase and decrease of compliance over inspiratory time, suggesting tidal recruitment and tidal hyperinflation, respectively. Based on the different values of SI showing different shapes, SI of straight curve equals to 1, SI of concave curve lower than 1 and convex curve higher than 1, the investigators speculated that the SI value could be reliably and accurately estimated by visual inspection of the P-t curve.
Study Type
OBSERVATIONAL
Enrollment
200
ICU, Beijing Tiantan Hospital, Capital Medical University
Beijing, Beijing Municipality, China
the types of pressure time curve by visual inspection.
the pressure time curves have the three types:the straight,concave,convex,the observers will judge the types of pressure time curve by visual inspection, and record the results of judgement
Time frame: up to 10min, from the ventilator screen being frozen to the two observers completing judgement.
This platform is for informational purposes only and does not constitute medical advice. Always consult a qualified healthcare professional.