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The Influence of Electroencephalographic Density Spectral Array Guidance of Sevoflurane Administration on Recovery
Iris J de Heer1, Hannah A C Raab1, Joost de Vries1
1Department of Anesthesia, Erasmus University Medical Centre, Rotterdam, the Netherlands.
Insights
Density spectral array monitoring in children undergoing anesthesia led to faster post-operative recovery. This electroencephalographic method also enabled a 22% reduction in sevoflurane dosage during maintenance anesthesia.
Area of Science:
- Anesthesiology
- Pediatric Anesthesia
- Neurophysiology
Background:
- Monitoring anesthesia depth in children is challenging due to brain development.
- Electroencephalographic density spectral array (DSA) offers age- and drug-specific patterns suitable for pediatric anesthesia.
- Limited data exists on DSA's impact on pediatric post-operative recovery.
Purpose of the Study:
- To evaluate the effect of DSA monitoring during general anesthesia on the speed of post-operative recovery in children.
- To compare recovery times between children managed with DSA-guided anesthesia and those receiving standard care.
Main Methods:
- A randomized controlled trial involving 96 children (6 months-12 years) undergoing elective surgery.
- Anesthesia was either titrated to a DSA pattern or based on a fixed end-tidal sevoflurane concentration (2.3%).
- The primary outcome was the time from sevoflurane discontinuation to meeting discharge criteria (Steward score ≥3).
Main Results:
- The time to discharge readiness was significantly shorter in the DSA group (6 min) compared to the standard care group (12 min).
- The mean end-tidal sevoflurane concentration was lower in the DSA group (1.8%) versus the standard care group (2.3%).
Conclusions:
- DSA monitoring in pediatric anesthesia demonstrated an added value in accelerating post-operative recovery.
- DSA guidance allowed for a 22% lower sevoflurane dose during maintenance compared to standard care.
Background:
In children, monitoring depth of anesthesia is challenging because of the still developing brain. Electroencephalographic density spectral array monitoring provides age- and anesthetic drug-specific electroencephalographic patterns, making it suitable for use in children. Yet, not much is known about the benefits of using density spectral array on post-operative recovery in children.
Aim:
In this randomized controlled trial, the primary aim was to investigate the influence of density spectral array monitoring during general anesthesia on the speed of recovery after surgery.
Methods:
Children aged 6 months-12 years scheduled for elective surgery under general anesthesia supplemented with caudal analgesia had either sevoflurane anesthesia titrated to maintain a characteristic density spectral array pattern or based on a predefined end-tidal sevoflurane concentration of 2.3% (standard care group). The time interval between the discontinuation of sevoflurane and the moment when discharge criteria from the operating room were met (Steward score of 3 or more) was defined as the primary outcome parameter of this trial.
Results:
Data from 96 children were analyzed. The time until discharge readiness from the operating room was shorter in group density spectral array (6 min. [13[4-16.8]]) than in group standard care (12 min. [18[6-24.3]]), with a difference between medians of 6 min (95% CI -7 to 0), p = 0.041. The mean end-tidal sevoflurane concentration during the surgical procedure was lower in group density spectral array, 1.8% (0.34) versus 2.3% (0.1) in group standard care (95% CI 0.4-0.7), p < 0.001.
Conclusion:
This randomized controlled trial provides initial evidence of an added value of density spectral array monitoring in terms of the speed of recovery and allows sevoflurane to be dosed 22% lower during maintenance than with a more traditional approach using a minimal alveolar concentration of 0.9.
Trial Registration:
ClinicalTrials.gov identifier: NCT05525104.
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