Burkhard et al reported nomograms for problems after free flap placement during head and neck reconstructions. One nomogram predicts flap-related complications. The authors are from Bern University in Switzerland.
Patient selection: free flap with microvascular reconstruction
Parameters:
(1) diuretic therapy
(2) intraoperative IV fluid volume in mL, from 2,000 to 13,000
points for IV fluid volume =
= (0.00909 * (volume)) - 18.1818
Parameter
Finding
Points
diuretic therapy
no
0
yes
40.8
total score =
= SUM(points for both of the parameters)
Interpretation:
• minimum score: 0
• maximum score: 140.8
value of X =
= (0.02439 * (score)) - 2.84
percent flap-related complications =
= 1/(1+EXP((-1)*X))
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