PT  - JOURNAL ARTICLE
AU  - Johnson Samuel
AU  - Sabih Mukhtar
AU  - Ujaas Dawar
AU  - Sharon Tungate
AU  - Lewis Roberts
AU  - Basharet Ibrahim
TI  - WatchPAT (WP) vs. Limited Polysomnography (LPS): observations from a pilot study
AID  - 10.1183/23120541.sleepandbreathing-2019.P64
DP  - 2019 Apr 11
TA  - ERJ Open Research
PG  - P64
VI  - 5
IP  - suppl 3
4099  - http://openres.ersjournals.com/content/5/suppl_3/P64.short
4100  - http://openres.ersjournals.com/content/5/suppl_3/P64.full
SO  - erjor2019 Apr 11; 5
AB  - Introduction: Referrals to sleep centres have increased in the UK. The waiting time to be seen far exceeds the stipulated 18 week Referral to Treatment (RTT). In our centre, patients referred for suspected OSA have a pre-clinic pulse oximetry. Those with a high Epworth Sleepiness score (ESS) are referred for LPS. WP a wrist mounted device measures arterial tone at the fingertip. Studies have validated the algorithm results by comparison with full PSG obviating the need for manual scoring. We conducted a pilot study comparing WP with LPS to assess patient preference, reliability of measured parameters and effect on RTT.Methods: Patients who did not have a diagnosis after pre-clinic pulse oximetry review were tested simultaneously with home LPS and WP. LPS tests were manually scored and compared with the automated report from the WP software.Results: 11 patients participated in the pilot study. Mean age was 40, mean BMI 35 and mean ESS was 14. Mean AHI on LPS was 15 and WP 17. Mean ODI on LPS was 18 and WP 7. Mean RDI on WP was 25. (see Table1). All patients were started on CPAP.Discussion: While the co-relation between AHI was good, WP underestimated ODI. The RDI on WP was an advantage. Manual scoring of LPS can incur a delay of a week plus clinician time. Patients were comfortable with WP as compared to LPS. Although this was a small pilot study, in view of the ease of use, shortening of the patient pathway time, good correlation of AHI, our centre is planning on using the WP device in regular practice.FootnotesCite this article as: ERJ Open Research 2019; 5 : Suppl. 3, P64.This is an ERS Sleep and Breathing Conference abstract. No full-text version is available. Further material to accompany this conference is available at www.ers-education.org (ERS member access only).