Effect of inspiratory flow waveform on work on endotracheal tubes: a model analysis
| Autor: | Andrea Rossi, Joseph Milic-Emili, E. D'Angelo, Guido Polese |
|---|---|
| Rok vydání: | 1999 |
| Předmět: |
Mechanical ventilation
Artificial ventilation Resistive touchscreen medicine.medical_specialty business.industry Airway Resistance medicine.medical_treatment Mechanics Critical Care and Intensive Care Medicine Models Biological Respiration Artificial Surgery Inspiratory Capacity Work of breathing Intubation Intratracheal Respiratory Mechanics Breathing medicine Humans Waveform business Tidal volume Work of Breathing |
| Zdroj: | Intensive Care Medicine. 25:503-507 |
| ISSN: | 1432-1238 0342-4642 |
| DOI: | 10.1007/s001340050888 |
| Popis: | Objective: This model analysis aimed to predict the impact of different inspiratory flow waveforms, i. e., constant, sinusoidal, and two linearly decreasing flows, on the resistive work (Wres) performed on endotracheal tubes. Design: Model analysis. Results: Model analysis predicts that: (i) minimal Wres is obtained with the constant flow; (ii) for any given tidal volume/inspiratory duration (Vt/Ti, mean inspiratory flow), Wres increases with decreasing tube size; (iii) for any given inspiratory flow waveform, Wres increases with increasing Vt/Ti, being lowest with constant flow. Conclusions: These findings have major clinical implications: at any given ventilator setting, not only the size of the endotracheal tube but also the inspiratory flow waveform must be taken into account to interpret the values of Wres and hence of the total work of breathing. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|
Full text from SpringerLink