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Quantifying Patient Capabilities and Setting the Stage for Future Development: Insights from a Sensor-Augmented
Jakob Lange1, Andreas E Schneider1, Christoph Jordi1
1Ypsomed AG, Burgdorf, Switzerland.
Medical Devices (Auckland, N.Z.)
|August 5, 2024
Summary
Sensor-augmented studies quantified user handling forces for pen injectors. Results show force exertion varies with user dexterity and device design, informing future self-injection device development.
Area of Science:
- Biomedical Engineering
- Human Factors Engineering
- Medical Device Design
Background:
- Traditional usability testing may not fully capture user limitations in device interaction.
- Understanding user force capabilities is crucial for safe and effective self-injection devices.
Purpose of the Study:
- To quantify user handling forces during pen injector use.
- To investigate the impact of user characteristics and device geometry on force exertion.
Main Methods:
- 46 participants (healthy and dexterity-impaired) performed simulated pen injector handling tasks.
- Non-functional devices with force/torque sensors were used.
- Participants applied comfortable and maximum forces for each step.
Main Results:
- Significant differences in comfortable and maximum forces were observed between healthy and impaired groups.
- Force exertion decreased with age and increased dexterity impairment.
- Applied forces were influenced by device geometry and grip.
Conclusions:
- Sensor-augmented simulated use studies provide quantitative data on user force capabilities.
- Findings inform performance requirements for improved self-injection device design.
- This research supports the advancement of user-centered injection devices.
