Related Experiment Video
Updated: Jul 20, 2026

Conducting Respiratory Oscillometry in an Outpatient Setting
Published on: April 8, 2022
[High-frequency oscillatory ventilation. A single-center study]
J A García Hernández1, A Vázquez Florido, A I Martínez López
1Unidad de Gestión Clínica de Cuidados Críticos y Urgencias, Hospital Infantil Universitario Virgen del Rocío, Sevilla, España. garcier@wanadoo.es
Insights
High-frequency oscillatory ventilation improved oxygenation in pediatric acute hypoxemic respiratory failure. This method demonstrated significant benefits in children requiring mechanical ventilatory support.
Area of Science:
- Pediatric critical care medicine
- Respiratory physiology
- Mechanical ventilation
Context:
- Acute respiratory failure in children presents significant management challenges.
- High-frequency oscillatory ventilation (HFOV) offers an alternative ventilatory strategy.
- Evaluating HFOV's efficacy in pediatric acute hypoxemic respiratory failure is crucial.
Purpose:
- To assess the safety and effectiveness of HFOV in pediatric patients.
- To analyze changes in gasometric and hemodynamic parameters during HFOV.
- To determine the impact of HFOV on oxygenation and survival rates.
Summary:
- A prospective observational study included 11 pediatric patients (age > 1 month) with acute respiratory failure.
- Key parameters monitored included ventilatory settings, gas exchange (PaO2, SaO2, PaCO2, pHa, PaO2/FiO2 ratio), and hemodynamic status.
- Results showed significant improvements in oxygenation (PaO2, SaO2, PaO2/FiO2 ratio) and a decrease in ventilatory support requirements (mean airway pressure, oxygenation index, FiO2).
Impact:
- HFOV significantly enhanced oxygenation in pediatric patients with acute hypoxemic respiratory failure.
- The study reported an overall survival rate of 82%.
- Findings support HFOV as a safe and effective ventilatory strategy for critically ill children.
Introduction:
High-frequency oscillatory ventilation is a safe and effective means of delivering mechanical ventilatory support.
Objective:
To evaluate the safety and effectiveness of high-frequency oscillatory ventilation in pediatric patients with acute respiratory failure.
Patients And Method:
From August 2003 to July 2005, we performed a prospective observational study of 11 children older than 1 month who underwent high-frequency oscillatory ventilation. Pediatric risk of mortality scores (PRISM), Murray lung-injury scores and air leak scores were recorded at baseline before ventilation. The following variables were studied: ventilatory settings (FiO2 and mean airway pressure), gasometric (PaO2, SaO2, PaCO2, pHa, PaO2/FiO2 ratio) and hemodynamic parameters (Partm, PVC), and the oxygenation index.
Results:
The overall survival rate was 82 %. Significant increases were found in PaO2 (p < 0.05), SaO2 (p < 0.05) and the PaO2/FiO2 ratio (p < 0.05), while mean airway pressure (p < 0.001), oxygenation index (p < 0.001), and FiO2 (p < 0.001) significantly decreased over time.
Conclusions:
High-frequency oscillatory ventilation significantly improved oxygenation in children with acute hypoxemic respiratory failure.
Related Concept Videos
Mechanical Ventilation III: Noninvasive Ventilation
Noninvasive Positive-Pressure Ventilation (NIPPV)
Assessment of Ventilation I: Respiratory Rate
A Ventilation assessment is critical for monitoring a patient's health status. Respiration, one of the most accessible vital signs, provides insights into the function of numerous body systems and can indicate serious health issues, such as brainstem injuries from head trauma.
Critical Guidelines for Assessing Ventilation:
Assessment of Ventilation II: Respiratory Depth and Rhythm
Respiratory depth measures the volume of air inhaled or exhaled during a breath. It can vary from shallow to deep and typically remains consistent when a person is at rest or asleep. Occasionally, individuals will automatically inhale deeply, known as sighing, which inflates the lungs with more air than normal breathing.
To assess respiratory depth, observe the degree of chest excursion or movement:
Mechanical Ventilation II: Invasive Ventilation
Negative-Pressure Ventilators
Negative-pressure ventilators create a vacuum around the chest or body to draw air into the lungs, simulating breathing. This method does not require an...
Mechanical Ventilation I: Indication and Settings
Ventilatory Modes
There are three ventilatory modes: full support, partial support, and spontaneous. These are described below.
Full Support Modes
Full support modes include controlled mechanical ventilation, continuous mandatory...

