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Published on: May 15, 2013
Comparison of high-frequency oscillatory ventilation and conventional mechanical ventilation in pediatric respiratory
Punkaj Gupta1, Jerril W Green2, Xinyu Tang3
1Division of Pediatric Critical Care, Department of Pediatrics, University of Arkansas Medical Center, Little Rock2Division of Pediatric Cardiology, Department of Pediatrics, University of Arkansas Medical Center, Little Rock.
Insights
High-frequency oscillatory ventilation (HFOV) in children with acute respiratory failure was associated with longer mechanical ventilation, ICU stays, and higher mortality compared to conventional mechanical ventilation (CMV). Early HFOV also showed worse outcomes.
Area of Science:
- Pediatric critical care medicine
- Respiratory physiology
- Mechanical ventilation strategies
Background:
- Outcomes of high-frequency oscillatory ventilation (HFOV) in pediatric acute respiratory failure are not well-established.
- Comparison with conventional mechanical ventilation (CMV) is needed to guide clinical practice.
Purpose of the Study:
- To compare outcomes between HFOV and CMV in pediatric patients with acute respiratory failure.
- To evaluate the impact of early vs. late HFOV initiation.
Main Methods:
- Retrospective observational study using the Virtual PICU System database (2009-2011).
- Included 9177 patients aged 1 month to 18 years receiving mechanical ventilation.
- Propensity score matching used to compare HFOV (early and late) with CMV.
Main Results:
- HFOV and early HFOV groups had significantly longer mechanical ventilation duration, ICU length of stay, and higher mortality rates compared to CMV.
- Standardized Mortality Ratio (SMR) was higher in HFOV (2.00) and early HFOV (1.62) groups versus CMV (0.85 and 0.76, respectively).
Conclusions:
- HFOV, including early initiation, is associated with worse outcomes in children with acute respiratory failure compared to CMV.
- Findings align with recent adult studies on HFOV versus CMV for acute respiratory distress syndrome.
Importance:
Outcomes associated with use of high-frequency oscillatory ventilation (HFOV) in children with acute respiratory failure have not been established.
Objective:
To compare the outcomes of HFOV with those of conventional mechanical ventilation (CMV) in children with acute respiratory failure.
Design, Setting, And Participants:
We performed a retrospective, observational study using deidentified data obtained from all consecutive patients receiving mechanical ventilation aged 1 month to 18 years in the Virtual PICU System database from January 1, 2009, through December 31, 2011. The study population was divided into 2 groups: HFOV and CMV. The HFOV group was further divided into early and late HFOV. Propensity score matching was performed as a 1-to-1 match of HFOV and CMV patients. A similar matching process was performed for early HFOV and CMV patients.
Exposure:
High-frequency oscillatory ventilation.
Main Outcomes And Measures:
Length of mechanical ventilation, intensive care unit (ICU) length of stay, ICU mortality, and standardized mortality ratio (SMR).
Results:
A total of 9177 patients from 98 hospitals qualified for inclusion. Of these, 902 (9.8%) received HFOV, whereas 8275 (90.2%) received CMV. A total of 1764 patients were matched to compare HFOV and CMV, whereas 942 patients were matched to compare early HFOV and CMV. Length of mechanical ventilation (CMV vs HFOV: 14.6 vs 20.3 days, P < .001; CMV vs early HFOV: 14.6 vs 15.9 days, P < .001), ICU length of stay (19.1 vs 24.9 days, P < .001; 19.3 vs 19.5 days, P = .03), and mortality (8.4% vs 17.3%, P < .001; 8.3% vs 18.1%, P < .001) were significantly higher in HFOV and early HFOV patients compared with CMV patients. The SMR in the HFOV group was 2.00 (95% CI, 1.71-2.35) compared with an SMR in the CMV group of 0.85 (95% CI, 0.68-1.07). The SMR in the early HFOV group was 1.62 (95% CI, 1.31-2.01) compared with an SMR in the CMV group of 0.76 (95% CI, 0.62-1.16).
Conclusions And Relevance:
Application of HFOV and early HFOV compared with CMV in children with acute respiratory failure is associated with worse outcomes. The results of our study are similar to recently published studies in adults comparing these 2 modalities of ventilation for acute respiratory distress syndrome.
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