Bag Valve Mask Ventilation as a Perceptual-Cognitive Skill
研究通过高仿真婴儿模型，比较专家与新手呼吸治疗师在袋阀面罩通气中如何利用视觉反馈（如血氧饱和度）来指导操作，发现新手过度依赖电子生命体征，而专家更注重直接观察患者。
Objective This study used a high-fidelity infant mannequin to examine the relationship between the quality of bag valve mask ventilation (BVMV) and how providers of varying levels of experience use visual feedback (e.g., electronic vital signs) to guide their performance. Background BVMV is a common and critical procedure for managing pediatric respiratory emergencies. However, providers do not consistently deliver effective BVMV. Efforts to improve BVMV have ignored the question of how providers effectively use feedback often available during BVMV. Method Six expert and six novice respiratory therapists completed two simulations of an infant requiring BVMV. In one, the technology failed to display SpO 2 , an important but somewhat redundant visual cue. Eye movements, verbal reports, and ventilation rate (in breaths per minute) were measured in each simulation. Results Regardless of SpO 2 availability, eye movements and verbal reports suggested that novices depended strongly on electronic vital signs and when SpO 2 was absent ventilated at a faster rate (exceeding the recommended range of ventilation rates) than when SpO 2 was present. Experts’ ventilation rates were comparable and within the recommended range in both conditions. When SpO 2 was absent, experts emphasized information from direct observation of the patient that novices neglected. Conclusion Individual differences in the use of feedback during BVMV contribute to the quality of BVMV. This work bears on the theoretical discussions involving the use of automation and nontechnological cues to guide performance. Application These results have the potential to expand the current understanding of factors underlying effective BVMV with implications for training novice providers.