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Cutaneous blood-flow patterns in free flaps determined by laser Doppler flowmetry
M J Place1, P Witt, D Hendricks
1Division of Plastic and Reconstructive Surgery, Loma Linda University, California 92354, USA.
Journal of Reconstructive Microsurgery
|August 1, 1996
Summary
Continuous laser Doppler measurements reveal dynamic changes in skin blood flow, establishing predictive patterns for flap survival in microvascular surgery. This method aids in accurately monitoring tissue perfusion postoperatively.
Area of Science:
- Biomedical Engineering
- Vascular Surgery
- Microsurgery
Background:
- Accurate monitoring of tissue perfusion is critical for flap survival in microvascular surgery.
- Existing flap monitoring methods lack widespread acceptance.
- Laser Doppler technology shows promise for assessing flap perfusion.
Purpose of the Study:
- To analyze trends in laser Doppler measurements over time in various free flaps.
- To establish predictive patterns for adequate flap perfusion based on blood flow dynamics.
Main Methods:
- Continuous laser Doppler measurements were used to monitor skin blood flow.
- Data was collected over time for free TRAM, latissimus dorsi, and iliac-crest osteomyocutaneous flaps.
- Laser Doppler Index (LDI) trends were analyzed in relation to postoperative hours.
Main Results:
- TRAM flaps showed a >600% LDI increase peaking at 52-80 hours postoperatively.
- Latissimus dorsi flaps exhibited a ~900% LDI increase peaking around 80 hours.
- Iliac-crest flaps demonstrated a >500% LDI increase peaking near 70 hours.
Conclusions:
- Continuous laser Doppler measurements reveal dynamic changes in skin blood flow postoperatively.
- Established trends allow for predictive patterns to gauge flap perfusion.
- This approach offers a more dynamic assessment than single normal values for flap viability.