Laser-doppler versus fluorometry in the postoperative assessment of a cutaneous free flap

✍ Scribed by M. Durlik; R. Benichoux; D. Mainard; M. Merle

• Publisher: John Wiley and Sons
• Year: 1989
• Tongue: English
• Weight: 402 KB
• Volume: 10
• Category: Article
• ISSN: 0738-1085
• DOI: 10.1002/micr.1920100305

✦ Synopsis

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.