PMC9944179_01
Polysomnography acquisition was done with external devices. (a)
'A little patient' with extended PSG equipment and accessories.
(b) Emfit mattress sheet which can be connected to Embla
N7000 bedside unit via bipolar inputs. The grey Cidelec CID-Lxe device with
PneaVoX sound sensor lay on the bed. (c) Depth sensor station
NEL. (d) Emfit sensor is placed under a foam mattress and
subject's thoracic area.
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It included PneaVox sensor for pharyngeal pressure and sound monitoring (Cidelec, France) (Figure 1b). In addition, Emfit mattress acquisition (Emfit ltd, Finland) (Figure 1d) and video monitoring with depth sensor (NEL, Neuro Event Labs, Finland) (Figure 1c) was also performed and triggered to Cidelec PSG recording. Inc, USA) and position with activity sensor (Figure 1a). In addition, simultaneous Emfit mattress, video monitoring and end-tidal carbon dioxide (etCO2) measurement (CAP10, Germany) were performed.
Screenshot (5 min) of daytime Cidelec analysis software showing the
hyperbreathing periods emphasized in Airflow channel (4 periods, one
with red square). Long apneas occurs between those gasping periods
(light blue square). Suprasternal pressure signal measured with tracheal
microphone was used to calculate respiratory effort. The Ei/Ee trace
visualize that expiration (Ee blue color, down) is emphasized over
inspiration (Ei red color, upfords) during hyperpnoea. In addition, the
increased breathing efforts are seen in Emfit mattress sensor.
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The measured signals are presented in Figure 2.