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Validation studies of virtual reality simulation performance metrics for mechanical thrombectomy in ischemic stroke
Robert Crossley1, Thomas Liebig2, Markus Holtmannspoetter3
1Neuroradiology, North Bristol NHS Trust, Southmead Hospital, Bristol, UK.
Journal of Neurointerventional Surgery
|January 19, 2019
Summary
Virtual reality (VR) simulation metrics effectively distinguish expert from novice performance in mechanical thrombectomy (MT) for ischemic stroke, addressing physician training needs. This validates VR as a tool for assessing MT skills.
Area of Science:
- Neurology
- Medical Simulation
- Interventional Radiology
Background:
- Mechanical thrombectomy (MT) is a crucial treatment for ischemic stroke.
- A shortage of trained physicians limits patient access to MT.
- Developing standardized metrics and training tools is essential.
Purpose of the Study:
- To develop and gain consensus on metrics for a reference mechanical thrombectomy (MT) procedure for ischemic stroke.
- To evaluate the construct validity of these metrics using a virtual reality (VR) simulation.
Main Methods:
- A Delphi panel of 21 interventional neuroradiologists (INRs) established procedure metrics (10 phases, 46 steps, 56 errors).
- These metrics were used to assess 8 expert and 10 novice INRs performing a VR-simulated MT procedure.
Main Results:
- Consensus was reached on the appropriateness of the MT procedure metrics.
- Expert INRs were 19% faster, completed 40% more phases, 20% more steps, and made 42% fewer errors than novices in VR simulation.
Conclusions:
- VR-simulated MT metrics successfully differentiated between expert and novice INR performance.
- The developed metrics demonstrate face, content, and construct validity for assessing MT skills.
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