Premium
Laser‐doppler versus fluorometry in the postoperative assessment of a cutaneous free flap
Author(s) -
Durlik M.,
Benichoux R.,
Mainard D.,
Merle M.
Publication year - 1989
Publication title -
microsurgery
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.031
H-Index - 63
eISSN - 1098-2752
pISSN - 0738-1085
DOI - 10.1002/micr.1920100305
Subject(s) - medicine , laser doppler velocimetry , microsurgery , free flap , surgery , fluorescence spectroscopy , fluorescence , radiology , optics , blood flow , physics
To find the optimal means for monitoring the vascularity of a cutaneous free flap in the postoperative period, we have experimentally compared laser‐Doppler velocimetry and fluorometry. Using the rat groin model, five groups were evaluated: 1. flap isolation without division of the pedicle vessels (island flap); 2) flap isolation, division, and repair of the pedicle artery and vein (free flap); 3) flap isolation, with ligation of the pedicle artery immediately or 1 hour later; 4) flap isolation, with ligation of the pedicle vein immediately or 1 hour later; 5) flap isolation, with ligation of the pedicle artery and vein immediately or 1 hour later. The laser‐Doppler processes the signal by combination of the root mean square and differential amplification. The fluoroscan gives an index in relation to the fluorescence of a control area. The results obtained with both methods correlated well with findings in clinical situations. However, the laser‐Doppler readings were more rapid and sensitive than those with fluorometry. We suggest that laser‐Doppler velocimetry is a superior means of monitoring the vascular status of a free tissue transfer or digital replant.