Head-Worn Displays for Emergency Medical Services Staff: Properties of Prehospital Work, Use Cases, and Design Considerations

Literature Title

Head-Worn Displays for Emergency Medical Services Staff: Properties of Prehospital Work, Use Cases, and Design Considerations

Literature Information

• Subject Area: Human-Computer Interaction (HCI), Augmented/Mixed Reality, Emergency Medical Services (EMS)
• Keywords: Emergency Medical Services, Head-Worn Displays, Smart Glasses, Human-Computer Interaction, Augmented Reality, Medical Devices, Emergency Training, Design Requirements

Research Background and Issues

• What problems or challenges did the authors identify?

  • Emergency Medical Services (EMS) work is complex and diverse, with limited access to information, dynamic environments, and potential hazards.
  • Using traditional handheld devices (e.g., smartphones and tablets) to support medical decision-making and information exchange interferes with manual tasks.
  • There is limited research on designing mature head-worn display (HWD) applications for EMS work environments.

• Why is this issue important?

  • The characteristics of EMS work (e.g., high pressure, high uncertainty, and operational complexity in the field) require tools that provide non-intrusive and continuous information support.
  • HWDs, with their hands-free operation and "what you see is what you share" features, can improve EMS staff efficiency and the quality of patient care.

• Research Motivation and Related Work

  • Historically, the EMS field lacks research support and has insufficient evidence-based practice guidance compared to other medical disciplines.
  • Existing studies primarily focus on HWD applications in hospital settings, while the value of HWDs in EMS work, particularly in air medical operations, remains underexplored.

Solutions

• What methods or solutions did the authors propose?

  • Identified three potential use cases for HWDs in EMS environments:
    1. Improving cross-party information exchange: Supporting remote collaboration through real-time audio and video (e.g., communicating with medical coordinators at the patient rescue site).
    2. Non-intrusive access to clinical monitoring information: Using HWDs to conveniently access vital signs and imaging data.
    3. Enhanced training simulations: Providing multi-dimensional environmental augmentation and clinical operation guidance through AR technology.

• What is innovative about this solution?

  • Proposes integrating HWDs into high-dynamic, collaboration-intensive EMS operational scenarios, offering a unique perspective to enrich research on the applicability of medical technologies in harsh environments.
  • Demonstrates the potential of HWDs to meet the specific needs of EMS environments and provides in-depth, concrete guidance for technology design.

• What are the implementation steps? What key technologies were used?

  • Research Methods:
    • Conducted interviews and field observations of EMS work (including helicopter rescue team missions) to understand current practices, challenges, and needs for HWDs.
    • Data was organized through semantic analysis, affinity diagrams, and case studies.
  • Key Technologies:
    • Enhanced HWD optical performance to adapt to varying ambient light conditions.
    • Utilized AR technology to present augmented information.
    • Supported communication and data transmission through wireless networks or ad hoc networks.

Research Outcomes

• What specific outcomes were achieved?

  1. Systematically analyzed helicopter rescue medical workflows and challenges.
  2. Proposed three primary applications of HWDs in this scenario:
     • AR-enhanced remote collaboration, such as using visual markers to guide procedural operations.
     • Location-independent real-time vital sign monitoring and alert notifications.
     • Introducing immersive visuals and contextual enhancements in low-fidelity training to improve training outcomes.
  3. Summarized five design considerations, including environmental adaptability, user cognitive load, collaboration needs, privacy protection, and high usability design.

• What advantages does it have compared to existing solutions?

  • Compared to hospital environment studies, it addresses more practical needs and use cases specific to EMS.
  • The hands-free support and adaptability of HWDs are better suited to harsh outdoor environments.
  • Enriches user experience through AR, extending HWD applications to rescue training and multi-party communication scenarios.

• What are the experimental or evaluation results?

  • Current findings are based on observations and feedback from EMS practitioners; the actual performance and usability of HWDs have not yet been evaluated through field deployment or experiments.
  • Proposed the technical foundations needed for further development and formal evaluation, such as adaptive user interface designs for operational load, enhanced display, and communication performance.

• Limitations and Future Directions

  • Limitations:
    • The study was conducted only in Queensland, Australia's EMS operations, and regional differences may exist.
    • No prototype of HWD applications was developed or experimentally validated.
  • Future Directions:
    • Develop functional HWD prototypes and engage EMS practitioners in participatory design.
    • Extend research to EMS environments in other regions and validate the generalizability of the concepts.
    • Develop comprehensive design guidelines to support the potential development of HWD applications in broader scenarios.