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A compartment model for fluorometric indication of tissue perfusion
L E Ostrander1, B Y Lee, D G Silverman
1Department of Biomedical Engineering, Rensselaer Polytechnic Institute, Troy, NY 12180.
IEEE Transactions on Bio-Medical Engineering
|October 1, 1990
Summary
This study optimizes sodium fluorescein dye measurements for soft tissue perfusion. Wash-in measurements are faster and preferable for clinical use, minimizing errors in blood flow calculations.
Area of Science:
- Biomedical Engineering
- Medical Imaging
Background:
- Sodium fluorescein is an in vivo indicator for soft tissue blood perfusion.
- Dye distribution and fluorescence are key to monitoring perfusion.
Purpose of the Study:
- To theoretically analyze dye kinetics and perfusion using a multicompartmental model.
- To optimize measurement techniques for accurate perfusion calculation from fluorescence readings.
Main Methods:
- Applied theoretical analysis with a multicompartmental model for dye distribution.
- Compared wash-in versus wash-out measurements and bolus injection versus constant infusion.
- Compensated for skin pigmentation by matching optical properties.
Main Results:
- Identified error sources in perfusion calculation related to dye concentration and measurement.
- Demonstrated high correlation (0.88–0.96) between wash-in and wash-out perfusion data in canine models.
- Wash-in measurements are significantly faster than wash-out.
Conclusions:
- Optimized measurement time minimizes errors in perfusion calculations.
- Wash-in measurements are clinically preferable due to speed and accuracy.
- The study provides a framework for accurate in vivo perfusion assessment using sodium fluorescein.