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Published on: January 17, 2011
Children with respiratory distress treated with high-flow nasal cannula
Thomas Spentzas1, Milan Minarik, Andrea B Patters
1Department of Pediatrics, University of Tennessee Health Science Center, Le Bonheur Children's Medical Center, Memphis, TN 38103, USA. tspentza@ utmem.edu
Insights
High-flow nasal cannula (HFNC) therapy significantly improves respiratory distress in children and neonates. This treatment enhances comfort, oxygen saturation, and lung aeration by providing mild positive airway pressure.
Area of Science:
- Pediatric Respiratory Medicine
- Critical Care
- Neonatology
Background:
- Respiratory distress is a common condition in neonates and children.
- High-flow nasal cannula (HFNC) therapy is increasingly used for respiratory support.
- The effectiveness and mechanisms of HFNC in pediatric populations require further elucidation.
Purpose of the Study:
- To assess the effectiveness of HFNC therapy in pediatric patients with respiratory distress.
- To evaluate patient comfort and tolerance during HFNC therapy.
- To investigate the physiological mechanisms underlying HFNC's therapeutic effects.
Main Methods:
- Retrospective review of 46 pediatric patients treated with HFNC.
- Assessment of modified COMFORT score, respiratory clinical scale, and oxygen saturation at baseline and post-therapy.
- Measurement of nasopharyngeal pressure and analysis of chest X-rays for lung expansion.
Main Results:
- Significant improvements observed in modified COMFORT score, respiratory clinical scale, and oxygen saturation (P < .05).
- HFNC therapy generated an average positive expiratory pressure of 4.0 cm H2O.
- Improved lung aeration or no change noted in 40 of 46 patients; 5 required mechanical ventilation.
Conclusions:
- HFNC therapy is effective in improving respiratory status and patient comfort in pediatric patients.
- The mechanism involves the application of mild positive airway pressure and lung volume recruitment.
- HFNC offers a viable alternative to mechanical ventilation in select cases of pediatric respiratory distress.
Unlabelled:
High-flow nasal cannula (HFNC) therapy is a treatment for respiratory distress in neonates and children. In the present study, we assessed its effectiveness, comfort, and possible mechanism of action.
Methods:
We reviewed records of 46 patients treated with HFNC and estimated the modified COMFORT score (7 to 35 units), the respiratory clinical scale (0 to 12 units), and the oxygen saturation level. Data were collected at time 0 (before the use of high-flow), time 2 (60 to 90 min post-application), and at time 3 (8 to 12 hours post-application). Furthermore, we measured the nasopharyngeal pressure while on continuous positive air pressure (CPAP) as well as the differences in ''lung expansion'' demonstrated by the prestudy and post-study chest x-ray.
Results:
There were significant improvements in the modified COMFORT score (F(1,45) = 40.03, P < .05), respiratory clinical scale (F(1.69,76.15) = 121.19, P < .05), and oxygen saturation (F(2,90) = 101.54, P < .05). Application of HFNC therapy created a significant average positive expiratory pressure of 4.0 +/- 1.99 (SE) cm H(2)O. X-rays taken after initiation of HFNC showed either improved aeration of the lungs or no changes in 40 of 46 patients. Mechanical ventilation was needed in 5 of 46 patients.
Conclusion:
Our study indicates that high-flow nasal cannula improves the respiratory scale score, the oxygen saturation, and the patient's COMFORT scale. Its mechanism of action is application of mild positive airway pressure and lung volume recruitment.
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