Figure 1.

Surgical model and perfusion system. (A) Saphenous fasciocutaneous flap during the perfusion. (B) Schema of the flap vasculature. (C) Intra-operative ultrasound evaluation of the flow (color Doppler and pulsed Doppler) in the saphenous artery (white arrow), with an estimate of the flow rate (red arrow). (D) Perfusion system: 1: peristaltic pump; 2: oxygenator; 3: oxygen flow; 4: bubble trap; 5: pressure sensor and inflow tap; 6: pressure monitor; 7: timer; 8: perfusate reservoir; 9: arterial cannula.