Why the study?
Does a 0.08% bupivacaine loading dose reduce hypotension and adverse effects compared to 0.5% bupivacaine in patients receiving continuous infusion epidural analgesia?
Does a 0.08% bupivacaine loading dose reduce hypotension and adverse effects compared to 0.5% bupivacaine in patients receiving continuous infusion epidural analgesia?
A lower concentration (0.08%) bupivacaine loading dose for epidural analgesia reduces hypotension and adverse effects while maintaining analgesic efficacy, despite a slight delay in onset.
Answers are grounded in this paper and cite their sources.
Lower bupivacaine loading doses may reduce hypotension in epidural analgesia; leaves open confirmation in randomized trials.
The effects of 0.08% and 0.5% bupivacaine, given in equal volumes as the loading dose prior to continuous infusion epidural analgesia, were compared. The incidence of hypotension, as well as the height of sensory blockade, was markedly lowered by reducing the loading dose of bupivacaine. However, the efficacy of the epidural analgesia was maintained by using the same volume for the loading dose. The mean onset of analgesia was delayed from 9.1 to 13.6 minutes. There were fewer calls for intervention consequent upon the reduction in adverse effects. The use of 8 ml 0.08% bupivacaine for the loading dose or for subsequent top-ups is recommended. The concept of a liquid sleeve of local anaesthetic in the epidural space is further supported.
No takes yet. Share an insight, caveat, or question.
MacLeod et al. (1987) studied this question.
Synapse has enriched 10 related papers. Consider them for comparative context: