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Tracking tidal volume noninvasively in volunteers using a tightly controlled temperature-based device: A proof of concept paper

Clinical Respiratory Journal, ISSN: 1752-699X, Vol: 14, Issue: 3, Page: 260-266
2020
  • 3
    Citations
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  • 18
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Metric Options:   Counts1 Year3 Year

Metrics Details

  • Citations
    3
    • Citation Indexes
      3
  • Captures
    18

Article Description

Introduction: There is a paucity of noninvasive respiratory monitors for patients outside of critical care settings. The Linshom respiratory monitoring device is a novel temperature-based respiratory monitor that measures the respiratory rate as accurately as capnography. Objectives: Determine whether the amplitude of the Linshom temperature profile was an accurate, surrogate and qualitative metric of the tidal volume (V) that tracks V in healthy volunteers. Methods: Forty volunteers breathed room air spontaneously through a tight-fitting continuous positive airway pressure mask with a Linshom device mounted in the mask. V was measured contemporaneously using a standalone Maquet Servo-i ICU ventilator. The amplitudes of the Linshom temperature profiles were paired with the contemporaneous V measurements using least squares linear regression analysis and the coefficient of variation (R) was determined. Results: Forty volunteers completed the study. The data from 30 of the volunteers were analysed and are presented; data from 10 volunteers were not included due to protocol violations and/or technical issues unrelated to Linshom. The fluctuations in the amplitude of the Linshom temperature profiles mapped closely with the measured V using least squares linear regression analyses yielding a mean R (95% CI) value of 0.87 (0.84-0.90). Conclusion: These results support the notion that the Linshom temperature profile is an accurate and reliable surrogate that tracks changes in V in healthy volunteers. Further studies are warranted in patients in clinical settings to establish the effectiveness of this monitor.

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