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Comprehensive Evaluation of User Interface for Ventilators Based on Respiratory Therapists' Performance, Workload,
Mingyin Jiang1,2, Shenglin Liu1,2, Jiaqi Gao1,2
1Department of Medical Engineering, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, Hubei, China (mainland).
Summary
Poor ventilator ergonomics increase human errors. This study found the Evital 4 ventilator had more task errors and higher workload for respiratory therapists compared to the Servo I, indicating a need for improved ventilator design.
Area of Science:
- Biomedical Engineering
- Human Factors Engineering
- Respiratory Care
Background:
- Poor ergonomic design in medical devices, specifically ventilators, can lead to critical human errors.
- Evaluating ventilator usability is crucial for patient safety and efficient clinical practice.
Purpose of the Study:
- To comprehensively evaluate the ergonomics of three different ventilators.
- To assess respiratory therapists' performance, workload, and user experience with these ventilators.
Main Methods:
- Sixteen respiratory therapists performed 7 standardized tasks on 3 ventilators.
- Performance measured by task errors; workload by blink rate/duration (objective) and NASA-TLX (subjective).
- User experience assessed using the USE Questionnaire.
Main Results:
- The Evital 4 ventilator resulted in significantly higher task errors compared to the Servo I.
- Objective workload measures (blink rate and duration) showed significant differences across ventilators and tasks.
- The Evital 4 had higher perceived workload (NASA-TLX), while the Servo I received superior user experience scores.
Conclusions:
- A comprehensive evaluation method using performance, workload, and user experience is proposed.
- The Evital 4 exhibits poor ergonomic design, potentially increasing error risk.
- Eye motion metrics (blink rate and duration) show promise for assessing user interface ergonomics.