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SLP detects tidal breathing patterns like traditional measurement techniques

5 months ago

Structured light plethysmography (SLP), a noncontact, light-based technique, can detect different breathing patterns similar to traditional techniques in patients with chronic obstructive pulmonary disease (COPD) compared with those without any respiratory disease, a study has found.

There have been reported differences in tidal (quiet) breathing patterns between patients with COPD and healthy individuals using traditional measurement techniques, according to researchers who examined whether SLP could also detect differences in tidal breathing patterns between healthy individuals and COPD patients.

The authors recorded a 5-min period of tidal breathing in each COPD patients (n=31) and each healthy participant (n=31), matched for age, body mass index and sex. They calculated the median and interquartile (IQR; denoting within-subject variability) of 12 tidal breathing parameters for every participant, combined individual data by cohort, and summarized these by its median and IQR.

COPD patients had lower inspiratory time (median tI) and variability (IQR of tI) after correction for multiple comparisons (p<0.001 and p<0.01, respectively), as well as ratios derived from tI (tI/tE and tI/tTot; both p<0.01) and their variability (p<0.01 and p<0.05, respectively).

The COPD group also had higher (p<0.001) IE50SLP (the ratio of inspiratory to expiratory flow at 50 percent tidal volume calculated from the SLP signal), but shorter (p<0.01) and considerably less variable (p<0.001) SLP-derived time to reach peak tidal expiratory flow over expiratory time (median tPTEFSLP/tE). Additionally, thoraco-abdominal asynchrony was elevated (p<0.05) in COPD.

The finding provides support for “further investigation into the potential uses of SLP in assessing clinical conditions and interventions,” according to researchers.

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Most Read Articles
Pearl Toh, one year ago
Middle East Respiratory Syndrome (MERS) patients have more severe illness and a higher mortality rate than non-MERS severe acute respiratory infection (SARI) patients, according to a study presented at the recent American Thoracic Society (ATS) International Conference 2016 held in San Francisco, California, US.
one year ago
Beclomethasone and formoterol combination pressurised metered-dose inhaler is effective for long-term asthma management, as revealed in the CASPER noninterventional, observational trial in Poland.
one year ago
Peak nasal inspiratory flow is as favourable as formal rhinomanometry as a marker of objective nasal patency but is cheaper, simpler, and more appropriate for serial measurements and home use according to a review.
Jairia Dela Cruz, one year ago
A group of allergens uniquely expressed in paediatric patients with persistent troublesome (PT) wheeze holds potential value as biomarkers in differentiating between troublesome and controlled wheezing, according to a study presented at the European Academy of Allergy and Clinical Immunology (EAACI) Congress 2016 held in Vienna, Austria.