A correction formula for computing specific airway resistance from a single-step measurement.

Abstract:

:Specific airway resistance (SRaw) is conventionally determined by multiplying the plethysmographically measured values of airway resistance and functional residual capacity (FRC). An alternative single-step method, which avoids the need for airway occlusion during determination of FRC, has been described by Dab and Alexander. The single-step method provides no correction for resistance or dead space of the apparatus and, as a result, systematically overestimates SRaw. Using 1,000 paired measurements, it was possible to compute a formula for correcting the single-step measurement. This correction formula can be adjusted and applied to measurements made in any laboratory. The unlimited applicability of the proposed correction has been demonstrated by 234 plethysmographic measurements made in the Pediatric Clinic in Rome.

journal_name

Pediatr Pulmonol

journal_title

Pediatric pulmonology

authors

Haluszka J,Willim G,Cutrera R,Ronchetti R,Filtcher S

doi

10.1002/ppul.1950060212

subject

Has Abstract

pub_date

1989-01-01 00:00:00

pages

118-21

issue

2

eissn

8755-6863

issn

1099-0496

journal_volume

6

pub_type

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