Scoring respiratory events in paediatric patients: Evaluation of nasal pressure and thermistor recordings separately and in combination

Nicole Verginis, Margot J Davey, Rosemary Sylvia Claire Horne

Research output: Contribution to journalArticleResearchpeer-review

7 Citations (Scopus)


BACKGROUND: In children both nasal pressure (NP) and thermistor (Th) technologies are commonly used to assess airflow measurement during routine polysomnography (PSG) for the assessment of sleep disordered breathing. We aimed to compare NP and Th measurement techniques when scoring central and obstructive respiratory events during PSG. METHODS: Sleep, arousal and respiratory scoring was performed manually by a single experienced scorer (NV) on 10 patients. Respiratory scoring was repeated using three different montages for each patient, including as the airflow measurement: NP only, Th only and both NP+Th (gold standard). The respiratory disturbance index (RDI), central apnoea index (CnAI), obstructive apnoea index (OAI), obstructive apnoea hypopnoea index (OAHI) and respiratory arousal index (RespArI) were calculated. Percent of sleep time with uninterpretable NP and Th signal was also assessed. RESULTS: The difference in CnAI for the different montages was clinically acceptable. But differences in the montages were clinically unacceptable for RDI, OAI, OAHI and RespArI. Using Th alone typically underestimated the number of obstructive events and respiratory arousals. Using NP alone resulted in an overestimation of obstructive apnoeas. NP signal was uninterpretable for a significantly greater percentage of the study than was the Th signal (mean 22+/-19 vs 2+/-2 , p
Original languageEnglish
Pages (from-to)400 - 405
Number of pages6
JournalSleep Medicine
Issue number4
Publication statusPublished - 2010

Cite this