Retromolar Route Access With and Without A Retromolar Gap - A Visualization Study Of The Vocal Cords
试验速览
- 阶段
- 不适用
- 状态
- 已完成
- 入组人数
- 40
- 试验地点
- 1
- 主要终点
- Cormack & Lehane score (without a backward, upward, rightwards pressure maneuver)
研究概览
简要总结
Retromolar Intubation is a successful option for intubation in patients with an existing retromolar gap in the case that the conventional method fails.
Therefore the investigators want to test if the retromolar gap is essential for performing the retromolar intubation technique.
详细描述
For successful endotracheal intubation an optimal visualisation of the vocal cords is essential. A study comparing retromolar and conventional laryngoscopy showed in patients with an existing retromolar gap, that the retromolar technique is superior for endotracheal intubation especially in patients with a failed 'conventional' intubation attempt. The aim of the following study is to test if a retromolar gap at the right mandible is necessary for the successful performance of the retromolar laryngoscopy technique.
Therefore, 20 patients with and 20 patients without a retromolar gap will be investigated.
The anesthesiologist will visually determine the view of the vocal cords and score it according to Cormack & Lehane. For an improved view a backward, upward, right-ward pressure (BURP) will be performed, if needed, and scored again.
Finally, endotracheal intubation will be performed by the 'conventional' intubation method. If, however, intubation is not possible, then the retromolar technique will be used. In the case that both methods fail, then any (other) intubation method will (can) be used.
研究设计
- 研究类型
- Interventional
- 分配方式
- Non Randomized
- 干预模型
- Parallel
- 主要目的
- Other
- 盲法
- None
入排标准
- 年龄范围
- 18 Years 至 99 Years（Adult, Older Adult）
- 性别
- All
- 接受健康志愿者
- 否
入选标准
- •BMI < 35kg/m2
- •Elective surgery
- •Absence of at least one molar of the right mandible in arm I (20 patients)
排除标准
- •Emergency patients
- •Prevalence of reflux disease
- •Toothless patients
- •Diaphragmatic hernia
- •Patient is not sober
- •Ventilation problems during induction of anaesthesia
- •Patient with a tracheostomy
研究组 & 干预措施
Patient with Retromolar Gap
20 patients with a retromolar gap between the last erupted molar and the ascending ramus at the right lower mandible.
干预措施: Retromolar laryngoscopy and scoring of the visualisation of the vocal cords according to Cormack & Lehane (Procedure)
Patient without a Retromolar Gap
20 patients without a retromolar gap between the last erupted molar and the ascending ramus at the right lower mandible.
干预措施: Retromolar laryngoscopy and scoring of the visualisation of the vocal cords according to Cormack & Lehane (Procedure)
结局指标
主要结局
Cormack & Lehane score (without a backward, upward, rightwards pressure maneuver)
时间窗: At least 2 minutes after muscle relaxation
After ensuring sufficient bag-mask ventilation, the scoring of the vocal cords according to Cormack \& Lehane will be performed at least 2 minutes after administration of the muscle relaxant rocuronium without a backward, upward, rightwards pressure maneuver (=BURB)
Cormack & Lehane score (with a backward, upward, rightwards pressure maneuver)
时间窗: Approximately 5-10 seconds after the collection of the Outcome Measure 1
If the Outcome Measure 1 does not reveal a 100% visualization of the vocal cords, a backward, upward, rightwards pressure maneuver (BURP) maneuver will be applied and scored again according to Cormack \& Lehane . Usually each of the two scoring procedures lasts approximately 5-10 seconds.
次要结局
未报告次要终点
研究者
Wolfgang SCHRAMM
Ao Univ. Prof. Dr. med. univ.
Medical University of Vienna