The Dept of Anaesthesia & Intensive Care, CUHK thanks

for an unrestricted education grant
BASIC instructor/provider course, Hong Kong, July 2nd-4th
Other upcoming courses
Home Feedback Contents

Table 1

Up International consensus Oesophageal Doppler Figure 3 Table 1 Table 2 Table 3 Table 4 Table 5 Table 7 Table 8 Table 9

Table 1. Assessment of the resonant frequency and damping coefficient of arterial pressure monitoring systems.

- Start paper trace to make a paper record of the output of the transducer.

- Snap or flick the valve of the continuous flush system or flick the tubing connecting the cannula to the transducer. This will produce an "interference" square-wave on the output trace.

- Repeat the process at least twice.

- Resonant frequency is the paper speed in mm/sec divided by the distance between successive peaks.

- Damping is satisfactory if each snap test has at least 2 oscillation waves and if the ratio of successive amplitudes is 3 or greater.

©Charles Gomersall, April, 2014 unless otherwise stated. The author, editor and The Chinese University of Hong Kong take no responsibility for any adverse event resulting from the use of this webpage.
Copyright policy    Contributors