+ Site Statistics
+ Search Articles
+ PDF Full Text Service
How our service works
Request PDF Full Text
+ Follow Us
Follow on Facebook
Follow on Twitter
Follow on LinkedIn
+ Subscribe to Site Feeds
Most Shared
PDF Full Text
+ Translate
+ Recently Requested

Flow triggering added to pressure support ventilation improves comfort and reduces work of breathing in mechanically ventilated patients



Flow triggering added to pressure support ventilation improves comfort and reduces work of breathing in mechanically ventilated patients



Journal of Critical Care 14(4): 172-176



The purpose of this study was to measure the effect of flow triggering (FT), added to pressure support ventilation (PSV), during spontaneous breathing in intubated patients. A prospective observational study was conducted at a Comprehensive Cancer Center, University Hospital. Fourteen consecutive critically ill, mechanically ventilated patients on PSV with positive end-expiratory pressure were studied. Flow triggering was added to PSV in spontaneously breathing ventilated patients. Respiratory rate (f), minute ventilation (Vepsilon), patient work of breathing (WOBp), respiratory drive (P0.1), rapid shallow breathing index (f/Vt), tidal volume (Vt) and a visual analog scale of breathing effort and comfort all improved. There was a large decrease in WOBp and P0.1 when flow triggering was added to PSV (P<.001). There was a moderate decrease in f/V1 during the same procedure (P<.01). Twelve patients felt subjectively better with the intervention. Flow triggering offers an excellent complement to PSV because it improves patient comfort and reduces the magnitude of the inspiratory effort as well as the delay time between inspiratory muscle contraction and gas flow. It augments gas exchange at no metabolic cost to the patient while reducing the work of breathing.

Please choose payment method:






(PDF emailed within 1 workday: $29.90)

Accession: 046104270

Download citation: RISBibTeXText

PMID: 10622751


Related references

Effect of Different Levels of Pressure Support and Proportional Assist Ventilation on Breathing Pattern, Work of Breathing and Gas Exchange in Mechanically Ventilated Hypercapnic Copd Patients with Acute Respiratory Failure. Respiration 70(4): 355-361, 2003

Effect of different levels of pressure support and proportional assist ventilation on breathing pattern, work of breathing and gas exchange in mechanically ventilated hypercapnic COPD patients with acute respiratory failure. Respiration; International Review of Thoracic Diseases 70(4): 355-361, 2003

Flow triggering added to pressure support ventilation improves pulmonary mechanics in intubated patients. Chest 106(2 Suppl. ): 69S, 1994

Estimation of triggering work of breathing. The dependence on lung mechanics and bias flow during pressure support ventilation. Chest 105(6): 1836-1841, 1994

Increased initial flow rate reduces inspiratory work of breathing during pressure support ventilation in patients with exacerbation of chronic obstructive pulmonary disease. Intensive Care Medicine 22(11): 1147-1154, 1996

Regulating tracheal pressure rather than airway opening pressure not only reduces patient work of breathing but also improves patient-ventilator synchrony in pressure support ventilation. Intensive Care Medicine 22(1 Suppl.): S124-0, 1996

Influence of different flow-triggering levels on the breathing effort of mechanically ventilated patients. Minerva Anestesiologica 78(9): 996, 2012

The effects of pressurization rate on breathing pattern, work of breathing, gas exchange and patient comfort in pressure support ventilation. European Respiratory Journal 18(1): 107-114, 2001

During pressure support ventilation automatic compensation for endotracheal tube resistance reduces patient work of breathing and improves patient-ventilator sychrony. Intensive Care Medicine 22(1 Suppl.): S122-0, 1996

Helium-oxygen reduces work of breathing in mechanically ventilated patients with chronic obstructive pulmonary disease. Intensive Care Medicine 29(10): 1666-1670, 2003

Comparison of work of breathing in spontaneous breathing lambs during continuous positive airway pressure and pressure support ventilation with and without bias flow. Pediatric Research 35(4 Part 2): 53A, 1994

Additional work of breathing and breathing patterns in spontaneously breathing patients during pressure support ventilation, automatic tube compensation and amplified spontaneous pattern breathing. European Journal of Anaesthesiology 22(4): 312-314, 2005

Classifying different types of double triggering based on airway pressure and flow deflection in mechanically ventilated patients. Respiratory Care 56(4): 460-466, 2011

Effects of expiratory triggering sensitivity on patient-ventilator expiratory synchrony and work of breathing in patients with chronic obstructive pulmonary disease during pressure support ventilation. Zhongguo Yi Xue Ke Xue Yuan Xue Bao. Acta Academiae Medicinae Sinicae 28(4): 507-511, 2006

Respiratory mechanics by least squares fitting in mechanically ventilated patients: applications during paralysis and during pressure support ventilation. Intensive Care Medicine 21(5): 406-413, 1995