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Influence of the "squeeze jacket" on lung function in young infants
B Steinbrugger1, A Lanigan, J M Raven
1Professorial Department of Thoracic Medicine, Royal Children's Hospital, Parkville, Victoria, Australia.
The American Review of Respiratory Disease
|November 1, 1988
Summary
The squeeze jacket can significantly affect infant lung function measurements. To ensure accurate results, lung function tests should be performed without the jacket or with the infant's arms outside the jacket.
Area of Science:
- Pediatric Pulmonology
- Infant Respiratory Physiology
Background:
- Accurate lung function measurements are crucial for diagnosing and managing respiratory conditions in infants.
- The use of external devices like the "squeeze jacket" may potentially alter respiratory mechanics and measurement validity.
Purpose of the Study:
- To investigate the impact of a "squeeze jacket" on lung function measurements in young infants.
- To determine if the positioning of the infant's arms (inside or outside the jacket) influences the results.
Main Methods:
- 29 infants underwent lung function testing under various conditions: jacket off, jacket on with arms inside, and jacket on with arms outside.
- Key parameters measured included thoracic gas volume (TGV), passive compliance of the respiratory system (Crs), respiratory system resistance (Rrs), and mouth pressure at end-inspiratory occlusion (Pm).
Main Results:
- Wearing the squeeze jacket with arms inside significantly reduced TGV and Crs, while increasing Rrs.
- TGV was significantly lower, and Rrs and Pm were significantly higher when the jacket was worn with arms inside compared to both jacket-off and jacket-on with arms outside conditions.
- No significant differences were observed between jacket-off and jacket-on with arms outside conditions.
Conclusions:
- The squeeze jacket, particularly when worn with the infant's arms inside, restricts chest and abdominal movement, leading to inaccurate lung function measurements.
- For reliable infant lung function assessment, it is recommended to perform measurements without the jacket or with the infant's arms positioned outside the jacket.