case_images: PMC9944179_01
case_images: 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.
case_images: 10.1177_2329048X231151361-fig1.jpg
case_images: PMC9944179_01_10.1177_2329048X231151361-fig1.jpg
case_images: fig1-2329048X231151361
case_images: 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.
case_images: 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.
case_images: 10.1177_2329048X231151361-fig2.jpg
case_images: PMC9944179_01_10.1177_2329048X231151361-fig2.jpg
case_images: fig2-2329048X231151361
case_images: The measured signals are presented in Figure 2.