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Table 3 Comparison of pressure outputs for demonstration trials

From: Visceral pressure stimulator for exploring hollow organ pain: a pilot study

Trial # Target pressure (mmHg) Analog Sphyg. (mmHg) VPS (mean ± SD) (mmHg) Analog-to-digital converter (mean ± SD) (mmHg) MatLab avg pressure from VPS signal MatLab VMR signal (V * s)
1 30 31 ± 3 32.92 ± 0.53 32.15 ± 0.70 32.83 1.33
2 30 31 ± 3 32.98 ± 0.57 32.16 ± 0.78 32.95 1.59
3 30 32 ± 3 32.34 ± 0.84 31.17 ± 1.16 32.33 1.22
  1. Data show pressure and calculated VMR for 3 trials (20 s of actual stimulus; total trial length 40 s; intertrial interval of 1 min) between the VPS, the inline analog-to-digital pressure converter and a commercial analog sphygmometer. The Matlab avg pressure was calculated from VPS signal and the Matlab VMR signal was calculated from the normalized EMG signal