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The ethics approval number is YXLL-KY-2024(083). The results of this study will be reported in peer-reviewed journals and at relevant academic conferences or on related research platforms.In this study, participants will be recruited by distributing recruitment materials to potential participants and their family members. The experimental protocol and possible risks will be fully explained to the participants. The study participants and their family members will sign an informed consent form before anaesthesia induction. The participants will take part in this study voluntarily. The participants will not be charged any fees for the oropharyngeal vent, bite block or other consumables used in this study. 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