Comparing quantitative values of two generations of laser-assisted indocyanine green dye angiography systems: can we predict XXXX ?

@entity1 @entity39
OBJECTIVE: Several devices exist today to assist the intraoperative determination of skin flap perfusion. Laser-Assisted Indocyanine Green Dye Angiography (LAICGA) has been shown to accurately predict mastectomy @entity39 using quantitative perfusion values. The laser properties of the latest LAICGA device (SPY Elite) differ significantly from its predecessor system (SPY 2001), preventing direct translation of previous published data. The purpose of this study was to establish a mathematical relationship of perfusion values between these 2 devices. METHODS: Breast reconstruction @entity1 were prospectively enrolled into a clinical trial where skin flap evaluation and excision was based on quantitative SPY Q values previously established in the literature. Initial study @entity1 underwent mastectomy skin flap evaluation using both SPY systems simultaneously. Absolute perfusion unit (APU) values at identical locations on the breast were then compared graphically. RESULTS: 210 data points were identified on the same @entity1 (n = 4) using both SPY systems. A linear relationship (y = 2.9883x + 12.726) was identified with a high level or correlation (R(2) = 0.744). Previously published values using SPY 2001 (APU 3.7) provided a value of 23.8 APU on the SPY Elite. In addition, postoperative @entity39 in these @entity1 correlated to regions of skin identified with the SPY Elite with APU less than 23.8. CONCLUSION: Intraoperative comparison of LAICGA systems has provided direct correlation of perfusion values predictive of @entity39 that were previously established in the literature. An APU value of 3.7 from the SPY 2001 correlates to a SPY Elite APU value of 23.8.
