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Papers of the Week

2019 May 14

Reg Anesth Pain Med

Randomized comparison between epidural waveform analysis through the needle versus the catheter for thoracic epidural blocks.


Tangjitbampenbun A, Layera S, Arnuntasupakul V, Apinyachon W, Venegas K, Godoy J, Aliste J, Bravo D, Blanch A, Webar J, Saadawi M, Owen A, Finlayson RJ, Tran DQ
Reg Anesth Pain Med. 2019 May 14.
PMID: 31092706.


Epidural waveform analysis (EWA) provides a simple confirmatory adjunct for loss of resistance (LOR): when the needle/catheter tip is correctly positioned inside the epidural space, pressure measurement results in a pulsatile waveform. Epidural waveform analysis can be carried out through the tip of the needle (EWA-N) or the catheter (EWA-C). In this randomized trial, we compared the two methods. We hypothesized that, compared with EWA-C, EWA-N would result in a shorter performance time.