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Analysis of Dynamic Changes in Cognitive Workload During Cardiac Surgery Perfusionists' Interactions With the
Lauren R Kennedy-Metz1,2, Roger D Dias2, Rithy Srey1
120028 VA Boston Healthcare System, Massachusetts, USA.
Human Factors
|December 17, 2020
Summary
This study measured heart rate variability (HRV) to assess cognitive workload in perfusionists during cardiopulmonary bypass (CPB). Cognitive workload peaked during the preclamp phase of CPB, highlighting an area for further passive measurement research.
Area of Science:
- Cardiovascular Surgery
- Anesthesiology
- Human Factors Engineering
Background:
- Estimating cognitive workload in real-world settings is crucial for operator performance.
- Effective cardiopulmonary bypass (CPB) pump operation is vital for patient homeostasis during cardiac surgery.
- Limited research exists on dynamic cognitive workload fluctuations in perfusionists.
Purpose of the Study:
- To investigate dynamic changes in heart rate variability (HRV) as a proxy for cognitive workload in perfusionists during CPB.
- To correlate HRV with subjective cognitive workload during different phases of cardiac surgery.
Main Methods:
- Collected HRV and self-reported cognitive workload from three certified perfusionists across 23 cardiac surgery cases.
- Analyzed five HRV components in 1-minute windows throughout the surgery.
- Averaged HRV values for distinct surgical phases: prebypass, three bypass phases, and postbypass.
Main Results:
- Cognitive workload was highest during the preclamp phase of CPB (between bypass initiation and aortic clamping).
- Cognitive workload decreased throughout the bypass period.
- Significant differences in HRV were observed between prebypass, bypass, and postbypass phases, as well as within the bypass phases.
Conclusions:
- Dynamic fluctuations in HRV correlate with subjective cognitive workload in perfusionists during cardiac surgery.
- The preclamp phase of CPB is associated with the highest cognitive workload.
- Passive HRV measurement may offer a valuable tool for monitoring perfusionist workload.
Keywords:
patient safetyphysiological measurementphysiological psychologysurgical care and procedural technologieswearable devicesMore Related Videos
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