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Eye Tracking Supported Human Factors Testing Improving Patient Training.

Kerrin Elisabeth Weiss1, Christoph Hoermandinger2, Marcus Mueller2

  • 1Product Development Group Zurich, Department of Mechanical and Process Engineering, ETH Zurich, Leonhardstrasse 21, 8092, Zürich, Switzerland. weisske@ethz.ch.

Journal of Medical Systems
|March 26, 2021
PubMed
Summary
This summary is machine-generated.

Patients using left ventricular assist devices (LVADs) gain confidence with routine tasks over time. However, emergency procedures require re-training to ensure patient safety and device reliability.

Keywords:
Emergency scenarioEye trackingMechanical circulatory supportPump-off timeTrainingUsability

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Area of Science:

  • Biomedical Engineering
  • Human Factors Engineering
  • Cardiovascular Technology

Background:

  • Left ventricular assist devices (LVADs) are critical for heart failure management but present usability challenges.
  • Effective patient training is essential for safe LVAD operation and improved quality of life.
  • Human factors testing can identify device usability issues and training effectiveness.

Purpose of the Study:

  • To evaluate the usability of the HeartWare HVAD system through human factors testing.
  • To assess the effectiveness of current training protocols for LVAD patients.
  • To identify specific challenges and areas for improvement in device handling.

Main Methods:

  • Eye tracking and task performance analysis were used to evaluate 32 LVAD patients and 3 technical experts.
  • Participants performed battery change (BC) and controller change (CC) tasks on a training device.
  • Key metrics included gaze point, task duration, and pump-off time.

Main Results:

  • Patients with LVAD support ≥1 year had shorter BC task durations, indicating routine mastery.
  • Conversely, patients with LVAD support ≥1 year showed longer CC task durations and higher pump-off times.
  • This suggests that while routine tasks become easier, less frequent emergency tasks may be more challenging over time.

Conclusions:

  • Longer-term LVAD patients develop efficient routines for common tasks.
  • Intermittent re-training is crucial for less frequent, critical procedures like controller changes to maintain patient safety.
  • Optimizing training strategies can enhance LVAD patient safety and device management.