Sleep Medicine

In sleep diagnostics, continuously monitoring the patient's PCO2 levels is important to assess nocturnal hypoventilation and to titrate noninvasive ventilation.

There are multiple techniques to monitor PCO2, but not all are appropriate in the sleep setting. Arterial blood sampling is intermittent and invasive, and cannot be done without disturbing the patient's sleep.

Sidestream end-tidal PCO2 (etCO2) monitoring is continuous and relatively easy to use. However, the quality of etCO2 depends on the physiological factors like lung health, breathing cycle, and the ventilation/perfusion ratio in addition to the gas sampling quality.

The majority of patients in the sleep setting are spontaneously breathing or on non-invasive ventilation, and in both situations the quality of etCO2 measurements is poor.

Transcutaneous pCO2 (tcpCO2) monitoring is continuous, noninvasive, and independent from the quality of the airway. This technique accurately estimates PaCO2 and overcomes the limitations of etCO2 and arterial blood sampling.

Reliable Measurement Performance

  • Lowest technical drift of the currently available tcpCO2 monitors (Storre 2010).
  • Retrospective correction of residual drift with V-STATS™
  • PCO2 artifact detection/rejection algorithm

Safe Sensor Temperature Management

  • Sophisticated temperature management is optimized above conventional standards, reducing the risk of skin irritation during overnight measurement periods.

Convenient Operation

  • Typical calibration interval of 12 hours
  • Membrane change interval of up to 42 days
  • SMART CALMEM allows disconnection of the SenTec TC Sensor for up to 30 minutes without the need for calibration, allowing for patient mobility during the night.
  • Less calibrations required due to SMART CALMEM
  • Dedicated parameter setting for sleep diagnostics (no auditory signals, no disturbing light from the display)

Comprehensive Data Management

  • Memory capacity of up to 12 days monitoring time
  • V-STATS™ (PC software) enabling trend data download for subsequent data analysis, reporting, and printing.
  • Convenient trend data download via the network with V-CareNeT™ (incorporated in V-STATS™)
  • Patient data acquired by the SDM can be communicated via analog output.
  • Analog output connector with reinforced electrical insulation, allowing for a safe and seamless interface with PG and PSG systems.