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P37 Preliminary normal values for structured light plethysmography tidal breathing parameters and age and gender differences
  1. S Fakhr1,
  2. L O’Reilly2,
  3. R Wilson1,
  4. B Cooper2,
  5. R Iles3
  1. 1PneumaCare Limited, Ely, UK
  2. 2Queen Elizabeth Hospital, Birmingham, UK
  3. 3Evelina Children’s Hospital, London, UK


Introduction This is the first report from an ongoing study to define normal values for Structured Light Plethysmography (SLP) tidal breathing parameters in adults. Structured Light Plethysmography (SLP) is a non-contact, non-invasive respiratory measurement technology that utilises the movement of thoraco-abdominal (TA) wall to measure a range of tidal breathing parameters. Various studies have been using SLP but lack of normative values can make any clinical judgement difficult.

Methods :As a part of an on-going collaboration between PneumaCare Ltd. and Queen Elizabeth (QE) Hospital (Birmingham, UK), 107 healthy adult subjects between ages of 18 to 69 were measured with SLP during 4 to 5 minutes of seated tidal breathing. Parameter means and standard deviations for males and females aged 18–39 and 40–69 were calculated and gender and age related comparisons were made (t-test).

Results Tables 1 summarises the normative values for males and females older and younger than 40 years. Three parameters showed age related differences and one parameter showed a gender related difference.

Conclusion Preliminary normal values for SLP derived tidal breathing parameters are reported. Some gender and age related differences are apparent. It is interesting that tPTEF/tE was significantly lower in the older participants, possibly a sign of natural airway obstruction associated with age.

Abstract P37 Table 1

SLP Tidal Breathing Parameters for adult male and female normals aged 18–69 years

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