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Effect of succinylcholine on subsequently administered mivacurium in children
L Jalkanen1, O A Meretoja, T Taivainen
1Department of Anaesthesiology, Children's Hospital University of Helsinki, Finland.
Insights
In children with normal plasma cholinesterase, succinylcholine administration did not affect neuromuscular recovery from mivacurium. This finding is crucial for understanding neuromuscular blocking agent interactions in pediatric anesthesia.
Area of Science:
- Anesthesiology
- Pharmacology
- Neuromuscular Monitoring
Background:
- Understanding drug interactions is vital in pediatric anesthesia.
- Neuromuscular blocking agents (NMBAs) like mivacurium and succinylcholine are commonly used.
- Succinylcholine's metabolism is dependent on plasma cholinesterase (pChE).
Purpose of the Study:
- To investigate the interaction between mivacurium and succinylcholine.
- To determine if prior succinylcholine administration affects mivacurium's recovery profile.
- To assess neuromuscular function recovery in pediatric patients.
Main Methods:
- 30 children (2-12 years) undergoing propofol-alfentanil-N2O-O2 anesthesia were studied.
- Neuromuscular response monitored via adductor pollicis electromyography (EMG).
- Two groups: mivacurium alone (Group M) vs. succinylcholine followed by mivacurium during early recovery (Group SchM).
Main Results:
- No significant difference in mivacurium recovery times between groups.
- Recovery of the first EMG response (25-75%) was similar: 3.6 ± 1.0 min (M) vs. 4.0 ± 0.7 min (SchM).
- Time to train-of-four ratio of 0.70 was comparable: 13.2 ± 3.3 min (M) vs. 13.6 ± 3.1 min (SchM).
Conclusions:
- Preceding succinylcholine administration does not influence neuromuscular recovery from mivacurium in pediatric patients with normal pChE activity.
- Mivacurium's recovery profile remains consistent regardless of prior succinylcholine exposure under these conditions.
- This suggests a predictable use of these agents in sequence for pediatric anesthesia.
Abstract:
The interaction between mivacurium and succinylcholine when mivacurium was administered during the early recovery from succinylcholine block was studied in 30 children 2-12 years of age anaesthetized with propofolalfentanil-N2O-O2. Neuromuscular response was monitored by adductor pollicis EMG. Fifteen patients received 200 micrograms.kg-1 of mivacurium (Group M), and another fifteen received 1500 micrograms.kg-1 of succinylcholine followed by 200 micrograms.kg-1 of mivacurium when the first EMG response recovered to 5% of calibration value (Group SchM). Plasma cholinesterase (pChE) activity was normal in each patient. The recovery times following mivacurium did not differ between the two groups. Times required for recovery of the first EMG response from 25 to 75% of full EMG recovery were 3.6 +/- 1.0 (mean +/- SD) and 4.0 +/- 0.7 min for the Groups M and SchM, respectively. The time from administration of mivacurium to the recovery of train-of-four ratio 0.70 was 13.2 +/- 3.3 min for the Group M and 13.6 +/- 3.1 min for the Group SchM (NS). Thus, in patients with normal pChE activity preceding administration of succinylcholine did not influence the recovery of neuromuscular function from subsequent mivacurium.