Abstract
Heightened awareness of the relevance of early lung development on subsequent lung health and the need to identify lung disease before changes become irreversible, has resulted in increased efforts to monitor lung function from birth and throughout the preschool years. International collaborative efforts to adapt techniques and develop standardized protocols, together with increased availability of appropriate commercial devices mean that it is now possible to perform a wide range of pulmonary function tests (PFTs) in infants and preschool children less than 6 years of age. The aims of this chapter are to (a) briefly describe which PFTs can be performed in spontaneously breathing sleeping infants and awake preschool children using commercially available equipment, (b) discuss how to interpret PFTs in children under 5 years, and (c) consider the extent to which these tests might contribute to clinical management of infants and preschool children.
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Abbreviations
- ATS/ERS:
-
American Thoracic Society/European Respiratory Society
- BDR:
-
Bronchodilator responsiveness
- BPD:
-
Bronchopulmonary dysplasia
- CF:
-
Cystic fibrosis
- Crs:
-
Respiratory compliance
- FEFV:
-
Forced expiratory flow volume
- FEV0.5 :
-
Forced expired volume in 0.5 s
- FRC:
-
Functional residual capacity
- FVC:
-
Forced vital capacity
- LCI:
-
Lung clearance index
- LLN:
-
Lower limit of normal
- MBW:
-
Multiple breath washout
- PFT:
-
Pulmonary function test
- QC:
-
Quality control
- Rint:
-
Interrupter resistance
- RR:
-
Respiratory rate
- Rrs:
-
Respiratory resistance
- SDS:
-
Standard deviation score (also known as Z-score)
- SOT:
-
Single occlusion technique
- sRaw:
-
Specific airways resistance
- tPTEF/tE:
-
Time to reach peak tidal expiratory flow as a ratio of expiratory time
- ULN:
-
Upper limit of normal
- VT:
-
Tidal volume
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Stocks, J. (2015). Infant and Preschool Pulmonary Function Tests. In: Davis, S., Eber, E., Koumbourlis, A. (eds) Diagnostic Tests in Pediatric Pulmonology. Respiratory Medicine. Humana Press, New York, NY. https://doi.org/10.1007/978-1-4939-1801-0_8
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