Effect of High-Flow Nasal Oxygen on Laryngoscopic View
Effect of Different Flows Using High-Flow Nasal Oxygen (HFNO) on Laryngoscopic View Quality During Videolaryngoscopy
調査の概要
状態
詳細な説明
Anaesthetic management Anaesthesia induction and airway management will be standardized as far as clinically feasible. Standard monitoring will be applied according to institutional practice. Preoxygenation will be performed using high-flow nasal oxygen (HFNO). General anaesthesia will be induced using standard intravenous agents, followed by administration of neuromuscular blockade to facilitate laryngoscopy. Mask ventilation will be performed as clinically indicated.
Videolaryngoscopy will be performed using a standardized device and blade type whenever possible. All procedures will be performed by anesthesiologists experienced in videolaryngoscopy.
Study procedure
After induction of anaesthesia and achievement of adequate conditions for laryngoscopy, videolaryngoscopy will be performed. During a single laryngoscopic sequence, images of the laryngeal view will be obtained under three predefined HFNO flow conditions:
- 0 L/min
- 40 L/min
- 60 L/min At each flow level, once a stable laryngeal view will be achieved, a still image will be captured using the videolaryngoscope recording system. The laryngoscope position will be maintained as stable as possible during acquisition of all three images. No attempt at tracheal intubation will be made during image acquisition.
After completion of the image capture protocol, tracheal intubation will be performed according to standard clinical practice.
All images will be anonymized and stored for subsequent offline analysis. Image assessment Captured images will be evaluated offline by an independent anesthesiologist blinded to HFNO flow rates and patient identity. Where applicable, evaluation will be performed by more than one assessor to allow assessment of inter-rater agreement.
Each image will be assessed using predefined objective and subjective measures (Percentage of Glottic Opening, Likert scale).
研究の種類
入学 (推定)
参加基準
適格基準
就学可能な年齢
- 大人
- 高齢者
健康ボランティアの受け入れ
サンプリング方法
調査対象母集団
説明
Inclusion Criteria:
- Age ≥18 years
- Scheduled for endotracheal intubation under general anesthesia
- Use of videolaryngoscopy
Exclusion Criteria:
- Anticipated difficult airway
- Emergency intubation
- Contraindications to HFNO
- Inability to obtain adequate video recording
研究計画
研究はどのように設計されていますか？
デザインの詳細
コホートと介入
グループ/コホート |
介入・治療 |
|---|---|
|
Group HFNO
Adult patients with HFNO support for airway management
|
Different flows will be applied to patients undergoing general anaesthesia during airway management.
In this arm flow will be 0 l/min.
During these flows images will be captured using videolaryngoscope.
Different flows will be applied to patients undergoing general anaesthesia during airway management.
In this arm flow will 40 l/min.
During these flows images will be captured using videolaryngoscope.
Different flows will be applied to patients undergoing general anaesthesia during airway management.
In this arm flow will 60 l/min.
During these flows images will be captured using videolaryngoscope.
|
この研究は何を測定していますか？
主要な結果の測定
結果測定 |
メジャーの説明 |
時間枠 |
|---|---|---|
|
Quality of view
時間枠：From induction of general anesthesia to completion of orotracheal intubation (not longer than 10 minutes).
|
Percentage of glottic opening (POGO score) assessed from recorded videolaryngoscopic images.
|
From induction of general anesthesia to completion of orotracheal intubation (not longer than 10 minutes).
|
二次結果の測定
結果測定 |
メジャーの説明 |
時間枠 |
|---|---|---|
|
Cormack-Lehane classification
時間枠：From induction of general anesthesia to completion of orotracheal intubation (not longer than 10 minutes).
|
Ordinal grading of glottic view using Cormack- Lehane classification.
|
From induction of general anesthesia to completion of orotracheal intubation (not longer than 10 minutes).
|
|
Subjective image quality (Likert scale)
時間枠：From induction of general anesthesia to completion of orotracheal intubation (not longer than 10 minutes).
|
Subjective assessment of laryngoscopic image quality rated on a 5-point Likert scale (1 = very poor, 5 = excellent) by independent evaluators blinded to HFNO flow conditions
|
From induction of general anesthesia to completion of orotracheal intubation (not longer than 10 minutes).
|
協力者と研究者
研究記録日
主要日程の研究
研究開始 (推定)
一次修了 (推定)
研究の完了 (推定)
試験登録日
最初に提出
QC基準を満たした最初の提出物
最初の投稿 (実際)
学習記録の更新
投稿された最後の更新 (実際)
QC基準を満たした最後の更新が送信されました
最終確認日
詳しくは
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