pulsatile and continuous waveforms respectively. Measurements of PSV using the pulsatile waveform demonstrated statistically significant variation across all hospitals ((Hospital/mean) A 43.9 cm/s, B 61.7 cm/s, C 57.4 cm/s, D 47.7 cm/s, p 50.001). Further analysis demonstrated statistically significant variation in 4 instrumentation related factors when measuring from a pulsatile waveform (Doppler angle, Angle of insonation, velocity range, scale range).Conclusions: We observed a significant level of error and variation in PSV measurements across four sites within our vascular network. Variation in instrumentation related factors may be accountable for this. In light of the centralisation of vascular services it is increasingly important to unify and implement scanning protocols in order to reduce error and inter-site variability.

Remifentanil is a safe and effective medication for ED use.

No abstract