Skip to main content

Table 2 Mean AChE activity ± SEM (nmol/min × ml) in lumbar CSF samples measured with the bupivacaine-inhibition test and the inhibitor-free test.

From: Acetylcholinesterase assay for cerebrospinal fluid using bupivacaine to inhibit butyrylcholinesterase

bupivacaine concentration (mmol/l) n           AChE activity
   bupivacaine-inhibition test   inhibitor-free test   calculated data: inhibitor-free test result +3%  
   nmol/min × ml ± SEM (range) % measured nmol/min × ml ± SEM (range) % defined nmol/min × ml ± SEM %
0.1 45 21.6 ± 0.1 (8.7–34.3) 102.8 ± 0.6 20.9 ± 0.0 (9.0–32.8) 100 21.6 ± 1.0 (9.3–33.8) 103
0.2 45 21.5 ± 0.1 (8.6–34.7) 102.4 ± 0.6 20.9 ± 0.0 (9.0–32.8) 100 21.6 ± 1.0 (9.3–33.8) 103
0.5 8 16.6 ± 1.0 (12.6–19.6) 103.4 ± 1.2 16.1 ± 1.0 (12.5–19.6) 100 16.6 ± 1.1 (12.7–20.2) 103
  1. The mean AChE activity measured with the inhibitor-free test was defined as 100% activity. 3% of each individual test result obtained with the inhibitor-free method were added to the original data and the calculated mean AChE activity ± SEM (103%) was displayed.