Weiss Kerrin Elisabeth, Hoermandinger Christoph, Mueller Marcus, Schmid Daners Marianne, Potapov Evgenij V, Falk Volkmar, Meboldt Mirko, Lohmeyer Quentin
Product Development Group Zurich, Department of Mechanical and Process Engineering, ETH Zurich, Leonhardstrasse 21, 8092, Zürich, Switzerland.
Department of Cardiothoracic and Vascular Surgery, German Heart Center Berlin, Berlin, Germany.
J Med Syst. 2021 Mar 25;45(5):55. doi: 10.1007/s10916-021-01729-4.
The handling of left ventricular assist devices (LVADs) can be challenging for patients and requires appropriate training. The devices' usability impacts patients' safety and quality of life. In this study, an eye tracking supported human factors testing was performed to reveal problems during use and test the trainings' effectiveness. In total 32 HeartWare HVAD patients (including 6 pre-VAD patients) and 3 technical experts as control group performed a battery change (BC) and a controller change (CC) as an everyday and emergency scenario on a training device. By tracking the patients' gaze point, task duration and pump-off time were evaluated. Patients with LVAD support ≥1 year showed significantly shorter BC task duration than patients with LVAD support <1 year (p = 0.008). In contrast their CC task duration (p = 0.002) and pump-off times (median = 12.35 s) were higher than for LVAD support patients <1 year (median = 5.3 s) with p = 0.001. The shorter BC task duration for patients with LVAD support ≥1 year indicate that with time patients establish routines and gain confidence using their device. The opposite effect was found for CC task duration and pump-off times. This implies the need for intermittent re-training of less frequent tasks to increase patients' safety.
对于患者而言，操作左心室辅助装置（LVAD）颇具挑战性，需要进行适当培训。这些装置的易用性会影响患者的安全和生活质量。在本研究中，开展了一项眼动追踪辅助的人因测试，以揭示使用过程中存在的问题并测试培训的有效性。共有32名HeartWare HVAD患者（包括6名VAD植入前患者）和3名技术专家作为对照组，在一台训练设备上按照日常和紧急情况场景进行了电池更换（BC）和控制器更换（CC）操作。通过追踪患者的注视点，对任务持续时间和泵停机时间进行了评估。LVAD支持时间≥1年的患者，其BC任务持续时间显著短于LVAD支持时间<1年的患者（p = 0.008）。相比之下，他们的CC任务持续时间（p = 0.002）和泵停机时间（中位数 = 12.35秒）高于LVAD支持时间<1年的患者（中位数 = 5.3秒），p = 0.001。LVAD支持时间≥1年的患者BC任务持续时间较短，这表明随着时间推移，患者建立了常规操作并在使用设备时获得了信心。而CC任务持续时间和泵停机时间则呈现相反的效果。这意味着需要对不常进行的任务进行间歇性再培训，以提高患者的安全性。
