Table 1

Measurement of zerodrift in 56 fibreoptic pressure probes

Day NoNo of zero drift readingsZero drift (mm Hg)
RangeMeanMedianSD
19−11 to 3−1.00−2.002.92
210−11 to 200.90−0.505.93
37−24 to 15−0.282.008.03
45 −3 to 358.004.0013.86
57−17 to 3−3.71−1.004.54
6 and 76−18 to 351.16−3.5011.41
8 and 96−10 to 142.163.002.16
10, 11, and 126 −7 to 8−0.66−1.000.00