BACKGROUND In 1999, the laryngeal tube (VBM Medizintechnik, Sulz, Germany) was introduced as a new supraglottic airway. It was designed to allow either spontaneous breathing or controlled ventilation during anaesthesia; additionally it may serve as an alternative to endotracheal intubation, or bag-mask ventilation during resuscitation. Several variations of this supraglottic airway exist. In our study, we compared ventilation with the laryngeal tube suction for single use (LTS-D) and a bag-mask device. One of the main points of the revised ERC 2005 guidelines is a low no-flow-time (NFT). The NFT is defined as the time during which no chest compression occurs. Traditionally during the first few minutes of resuscitation NFT is very high. We evaluated the hypothesis that utilization of the LTS-D could reduce the NFT compared to bag-mask ventilation (BMV) during simulated cardiac arrest in a single rescuer manikin study. METHODS Participants were studied during a one day advanced life support (ALS) course. Two scenarios of arrhythmias requiring defibrillation were simulated in a manikin. One scenario required subjects to establish the airway with a LTS-D; alternatively, the second scenario required them to use BMV. The scenario duration was 430 seconds for the LTS-D scenario, and 420 seconds for the BMV scenario, respectively. Experienced ICU nurses were recruited as study subjects. Participants were randomly assigned to one of the two groups first (LTS-D and BMV) to establish the airway. Endpoints were the total NFT during the scenario, the successful airway management using the respective device, and participants' preference of one of the two strategies for airway management. RESULTS Utilization of the LTS-D reduced NFT significantly (p < 0.01). Adherence to the time frame of ERC guidelines was 96% in the LTS-D group versus 30% in the BMV group. Two participants in the LTS-D group required more than one attempt to establish the LTS-D correctly. Once established, ventilation was effective in 100%. In a subjective evaluation all participants preferred the LTS-D over BMV to provide ventilation in a cardiac arrest scenario. CONCLUSION In our manikin study, NFT was reduced significantly when using LTS-D compared to BMV. During cardiac arrest, the LTS-D might be a good alternative to BMV for providing and maintaining a patent airway. For personnel not experienced in endotracheal intubation it seems to be a safe airway device in a manikin use.

中文翻译：

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气道管理策略对重症监护护士“高级生命支持课程”期间“无流动时间”的影响 - 单一救援人员复苏模型研究。

背景 1999 年，喉管（VBM Medizintechnik，Sulz，德国）作为一种新的声门上气道被引入。它旨在允许在麻醉期间进行自主呼吸或受控通气；此外，它还可以作为复苏期间气管插管或气囊面罩通气的替代方法。这种声门上气道存在多种变体。在我们的研究中，我们将通气与一次性使用喉管抽吸 (LTS-D) 和袋式面罩装置进行了比较。修订后的 ERC 2005 指南的要点之一是低无流动时间 (NFT)。NFT 定义为未发生胸部按压的时间。传统上，在复苏的前几分钟 NFT 非常高。我们评估了在单个救援人员模型研究中模拟心脏骤停期间使用 LTS-D 与气囊面罩通气 (BMV) 相比可以减少 NFT 的假设。方法 在为期一天的高级生命支持 (ALS) 课程中对参与者进行了研究。在人体模型中模拟了需要除颤的两种心律失常情况。一种情况要求受试者使用 LTS-D 建立气道；或者，第二种情况要求他们使用 BMV。LTS-D 场景的场景持续时间分别为 430 秒和 BMV 场景的 420 秒。招募有经验的ICU护士作为研究对象。首先将参与者随机分配到两组中的一个（LTS-D 和 BMV）以建立气道。端点是场景中的总 NFT，使用各自的设备成功进行气道管理，以及参与者对两种气道管理策略之一的偏好。结果 LTS-D 的使用显着降低了 NFT（p < 0.01）。LTS-D 组对 ERC 指南时间框架的遵守率为 96%，而 BMV 组为 30%。LTS-D 组中的两名参与者需要多次尝试才能正确建立 LTS-D。一旦建立，通风是 100% 有效的。在主观评估中，所有参与者都更喜欢 LTS-D 而非 BMV，以在心脏骤停情况下提供通气。结论 在我们的人体模型研究中，与 BMV 相比，使用 LTS-D 时 NFT 显着降低。在心脏骤停期间，LTS-D 可能是 BMV 的一个很好的替代品，用于提供和维持通畅的气道。