Laser-Doppler versus fluorometry in the postoperative assessment of a cutaneous free flap.
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.
Durlik
M
M
Institut de Recherches Chirurgicales, C.H.U. de Brabois, Vandoeuvre-les-Nancy, France.
Benichoux
R
R
Mainard
D
D
Merle
M
M
D000818:Animals; D001783:Blood Flow Velocity; D005470:Fluorometry; D008297:Male; D008991:Monitoring, Physiologic; D011183:Postoperative Complications / Q000175:diagnosis* / Q000503:physiopathology; D051381:Rats; D011919:Rats, Inbred Strains; D012092:Replantation; D012212:Rheology; D016038:Skin Transplantation; D013524:Surgical Flaps; D013927:Thrombosis / Q000175:diagnosis* / Q000503:physiopathology