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- W4291781147 abstract "Dexmedetomidine is commonly used in hysteroscopy surgery due to its analgesia and sedation without respiratory depression. Many studies have shown that dexmedetomidine can reduce the consumption of sevoflurane. However, the optimal end-tidal concentration of sevoflurane when it is co-administered with dexmedetomidine has not been established. The primary purpose of this study was to investigate the minimal alveolar concentration (MAC) of sevoflurane for cervical dilatation combined with different doses of dexmedetomidine in patients with hysteroscopy surgery.One-hundred patients undergoing hysteroscopy surgery were enrolled in this clinical trial. All the patients were randomly assigned into four groups (C, D1 , D2 , D3 ) and received a loading dose of dexmedetomidine (0, 0.6, 0.8 and 1.0 μg/kg) over 10 min before anaesthesia induction, respectively. Anaesthesia was induced in each patient with 5% sevoflurane in 100% oxygen via a facemask. A laryngeal mask (LMA) was inserted when the patient had lost consciousness and the BIS value decreased below 40. The response to cervical dilatation stimulus (movement vs non-movement) by the insert of hysteroscope was recorded. The MAC of sevoflurane was measured by up and down sequential method of Dixon and Mood and centred isotonic regression analysis.The calculated MAC of sevoflurane using up-and-down method of Dixon and Mood in patients with hysteroscopy surgery was (1.90 ± 0.13)%, (1.23 ± 0.16)%, (1.03 ± 0.10)% and (0.93 ± 0.08)% in groups C, D1 , D2 and D3 , respectively.The administration of dexmedetomidine can significantly decrease the MAC of sevoflurane for hysteroscopy surgery. However, a ceiling effect of the reduction was observed when the dose of dexmedetomidine was higher than 0.8 μg/kg." @default.
- W4291781147 created "2022-08-16" @default.
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- W4291781147 date "2022-08-16" @default.
- W4291781147 modified "2023-09-26" @default.
- W4291781147 title "Minimal alveolar concentration of sevoflurane in combination with dexmedetomidine in patients with hysteroscopy: An up‐down sequential allocation study" @default.
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- W4291781147 doi "https://doi.org/10.1111/bcpt.13777" @default.
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