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Control of breathing in children with interstitial lung disease
Insights
Children with interstitial lung disease (ILD) show altered breathing patterns, including faster breathing and increased inspiratory effort. Their breathing control is significantly impacted by lung elastance, affecting overall respiratory function.
Area of Science:
- Pediatric Pulmonology
- Respiratory Physiology
- Medical Research
Background:
- Interstitial lung disease (ILD) affects children's respiratory system.
- Understanding breathing control in pediatric ILD is crucial for management.
Purpose of the Study:
- To investigate the control of breathing at rest in children with ILD.
- To compare respiratory parameters in ILD children with healthy controls.
Main Methods:
- Measured breathing patterns and mouth occlusion pressure (P0.1) in 14 children with ILD (ages 4-16).
- Compared results to previously reported data from healthy children.
- Analyzed relationships between respiratory parameters like lung elastance (EL) and arterial O2 pressure (PaO2).
Main Results:
- Children with ILD exhibited increased respiratory frequency and minute ventilation.
- Inspiratory time (TI) was shortened and related to increased lung elastance (EL).
- Mouth occlusion pressure (P0.1) was higher, linked to reduced arterial O2 pressure (PaO2) and increased lung elastance (EL), indicating enhanced inspiratory impedance.
Conclusions:
- Pediatric ILD is associated with significant alterations in breathing control.
- Increased lung elastance in ILD contributes to enhanced effective inspiratory impedance and altered breathing patterns.
- Breathing control mechanisms are compromised in children with interstitial lung disease.
Abstract:
Control of breathing at rest was studied in 14 children (4-16 years old) with interstitial lung disease (ILD). Four of them were tested several times. Breathing pattern and the mouth occlusion pressure (P0.1) were measured. Results in ILD children were compared to values in healthy children previously reported. Respiratory frequency and minute ventilation were increased (P less than 0.02). Inspiratory time (TI) was shortened (P less than 0.001), the shortening in TI being significantly related to the increase in lung elastance (EL). The ratio of TI to the total duration of the respiratory cycle (TI/TTOT) was lowered (P less than 0.01). Tidal volume (VT) both in ml and normalized for body weight (BW) was normal. P0.1 was higher than predicted. The increase in P0.1 was significantly related to change in arterial O2 pressure (PaO2) which was reduced in 10 cases. There was a significant relationship between the increase in P0.1 and in EL. The increase in mean inspiratory flow (VTBW/TI) was related to the increase in EL. But VTBW/TI was not increased as much as P0.1. Consequently the effective inspiratory impedance was enhanced. This high effective inspiratory impedance was related to the increased lung elastance.