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Table 2 Differences between contraction period measured with diaphragmatic length (DL) and contraction period measured with thoracic motion (TM), respiratory airflow (FL) and transdiaphragmatic pressure (DP).

From: Non-Invasive monitoring of diaphragmatic timing by means of surface contact sensors: An experimental study in dogs

  DL vs. TM DL vs. FL DL vs. DP
  MEAN (s) SD(s) MEAN - 2SD (s) MEAN + 2SD (s) MEAN (s) SD(s) MEAN - 2SD (s) MEAN + 2SD (s) MEAN (s) SD(s) MEAN - 2SD (s) MEAN + 2SD (s)
Dog 1 (SVN) 0.15 0.05 0.05 0.26 -0.25 0.08 -0.39 -0.01 -0.19 0.07 -0.32 -0.05
Dog 2 (SVN) 0.03 0.03 -0.02 0.09 -0.00 0.04 -0.09 0.08 0.01 0.03 -0.05 0.06
Dog 3 (SVN) 0.04 0.03 -0.01 0.10 0.03 0.04 -0.05 0.11 -0.00 0.04 -0.07 0.07
Dog 1 (SVW) -0.00 0.03 -0.05 0.06 0.02 0.03 -0.04 0.08 0.02 0.04 -0.05 0.10
Dog 2 (SVW) 0.03 0.03 -0.03 0.08 -0.04 0.04 -0.12 0.04 -0.02 0.02 -0.06 0.02
Dog 3 (SVW) -0.03 0.02 -0.08 0.02 -0.00 0.03 -0.06 0.05 -0.02 0.05 -0.11 0.08
Dog 1 (ILW) 0.09 0.02 -0.04 0.13 0.02 0.02 -0.02 0.06 0.03 0.02 -0.00 0.07
Dog 2 (ILW) 0.04 0.02 -0.00 0.08 -0.01 0.05 -0.10 0.08 0.01 0.02 -0.02 0.04
Dog 3 (ILW) -0.01 0.02 -0.04 0.02 -0.01 0.02 -0.04 0.03 0.04 0.02 -0.00 0.08
  1. MEAN: Mean difference; SD: standard deviation; MEAN ± 2SD: limits of agreement of the Blond and Altman analysis; SVN: spontaneous ventilation without anaesthesia respiratory test, SVW: spontaneous ventilation with anaesthesia respiratory test; ILW: inspiratory load with anaesthesia respiratory test.