Robust analysis of microcirculatory flowmotion during post-occlusive reactive hyperemia

Area of Science:

• Physiology
• Biomedical Engineering
• Microcirculation Research

Background:

• Flowmotion analysis extracts vessel regulatory function from microcirculatory blood flow.
• Previous applications in post-occlusive reactive hyperemia (PORH) showed promise.
• PORH signals contain artifacts (reperfusion peak, monotonic decline) that mimic false vasomotion.

Purpose of the Study:

• Develop and validate a robust method for flowmotion analysis of PORH signals.
• Improve the accuracy of vasomotion assessment in microcirculation.

Main Methods:

• A mathematical model was developed to detrend the transient reperfusion response in PORH signals.
• The model removes artifacts before flowmotion analysis.
• Validation was performed on 96 measurements from healthy volunteers.

Main Results:

• The proposed detrending model successfully corrected the flowmotion signal.
• No substantial new false vasomotion components were introduced by the model.
• The method enables more reliable analysis of microcirculatory blood flow regulation.

Conclusions:

• The developed mathematical model provides a robust method for flowmotion analysis of PORH.
• Future studies analyzing flowmotion during PORH should utilize this validated method.
• Ensuring accurate vasomotion assessment is crucial for understanding microcirculatory function.