S A N T È • LÖW E N S T E I N S L E E P T H E R A PY D E V I C E S
Appendix 1 Pgs. 5-6
P
Internal validation data compared to PSG recording A retrospective comparison (re-simulation of respiratory signals with prisma RECOVER) with n=41 patients in APAP therapy yielded a correlation of r = 0.649, p < 0.0001.
250
200
150
100
50
200
0
0
50
100
150
Minutes of deep sleep manually scored from PSG
Figure 4: Comparison of length of deep sleep, determined from PSG and respiratory data
In an assessment of agreement among human scorers using the EEG, the intraclass correlation for time spent in deep sleep was 0.628 (R&K) and 0.698 (AASM) (Danker-Hopfe et al., 2009). The re- sults underscore the performance of prisma RECOVER. Because different measurement methods and even different scorers using identical measurement methods can deviate in the assessment of deep sleep duration, patients should always be asked about their subjectively perceived symptoms in a suspected case and as part of routine monitoring.
Limitations : - Periods of sleep without PAP use cannot be taken into account for deep sleep duration. They do not correspond per se to the therapy goal, and it must be assumed that such periods have a limited restorative effect for patients affected by Sleep-Disordered Breathing (SDB). - In the presence of increased undesired leaks, the airflow signals measured by the PAP device are likely to be faulty. Consequently, the time spent in deep sleep is underestimated. Before AHI and deep sleep are evaluated, problems with mask and mouth leaks should be resolved.
5
Sleep Quality in CPAP/APAPTherapy
Made with FlippingBook Online newsletter