Anesthesia
Conditions
Brief summary
The purpose of this clinical trial is to compare hypnotic effect of sevoflurane and desflurane at equal minimum alveolar concentrations using power spectral analysis of the electroencephalogram.
Detailed description
Volatile anesthetics vary in their relative hypnotic potency. Recent studies demonstrated that equi-minimum alveolar concentration of various volatile anesthetic agents may produce different spectral entropy or bispectral index values. However, there were no studies that demonstrate the difference of hypnotic potency using power spectral analysis of electroencephalographic signals (e.g., spectral edge frequency 95%, total power, % value of each bandage). The purpose of this clinical trial is to compare hypnotic effect of sevoflurane and desflurane at equal minimum alveolar concentrations using power spectral analysis of the electroencephalogram.
Interventions
DRUGSevoflurane
Anesthesia was maintained with sevoflurane in patients undergoing arthroscopic knee surgery under general anesthesia. End-tidal concentration of sevoflurane was maintained at age-corrected 1 minimum alveolar concentration throughout the study period.
DRUGDesflurane
Anesthesia was maintained with desflurane in patients undergoing arthroscopic knee surgery under general anesthesia. End-tidal concentration of desflurane was maintained at age-corrected 1 minimum alveolar concentration throughout the study period.
Sponsors
Kangbuk Samsung Hospital
Study design
Allocation
RANDOMIZED
Intervention model
PARALLEL
Primary purpose
PREVENTION
Masking
TRIPLE (Subject, Investigator, Outcomes Assessor)
Eligibility
Sex/Gender
ALL
Age
19 Years to 65 Years
Healthy volunteers
No
Inclusion criteria
* patients undergoing arthroscopic knee surgery under general anesthesia using volatile anesthetics * patients with american society of anesthesiologist physical status I, II * patients aged 19-65 years * patients obtaining written informed consent
Exclusion criteria
* patients with a history of any psychiatric or neurological disease * patients who had received any medication affecting the central nervous system * patients who had received medication affecting the sympathetic or parasympathetic nervous systems * patients undergoing tracheal intubation for airway management * pregnant women
Design outcomes
Primary
| Measure | Time frame | Description |
|---|---|---|
| Spectral edge frequency 95% value | During about 30 min study period | EEG variables were measured after meeting steady-state anesthesia of 1 MAC. |
Secondary
| Measure | Time frame | Description |
|---|---|---|
| Bispectral index | During about 30 min study period | Bispectral index measurements were made after meeting steady-state anesthesia of 1 MAC. |
Countries
South Korea
Outcome results
None listed