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Papers of the Week

2020 Feb

Acta Anaesthesiol Scand



Volume of ropivacaine 0.2% and sciatic nerve block duration:a randomised, blinded trial inhealthy volunteers.


Christiansen CB, Madsen MH, Rothe C, M Andreasen A, H Lundstrøm L, Lange KHW
Acta Anaesthesiol Scand. 2020 Feb; 64(2):238-244.
PMID: 31605392.


Sciatic nerve blocks are used for many orthopaedic procedures on the knee, lower leg, foot and ankle.However, as nerve block durations vary considerably, timing of supplemental analgesia is challenging. Therefore, knowledge on the effect of local anaesthetic (LA) dose on block duration is important to outweigh the benefits of increasing LA dose against the risk of LA systemic toxicity. In this randomised, double-blind trial, we aimed to explore the relationship between the volume of ropivacaine 0.2% and sciatic nerve block duration. We hypothesised that increasing LA volume would prolong block duration.