[Observation of intraoperative lower limb blood flow of infrarenal aortic occlusion]

To summarize the surgical therapy and profiles of lower limb blood flow during surgery for chronic infrarenal aortic occlusion.

A total of 36 patients of chronic infrarenal aortic occlusion underwent surgical procedures at our department from 2004 to 2011. Their clinical data were analyzed. Several methods were applied at different time points during surgery to observe the lower limb blood flow.

SaO2, waveforms of dorsalis pedis artery and posterior tibial artery changed dramatically at different time points during surgery. Before and after blood occlusion, the SaO2 was 82% ± 6% and 23% ± 4% respectively, 1min after unclamped and after abdomen-closing, the SaO2 increased to 66% ± 5% and 88% ± 8% respectively.

Doppler blood flow and blood oxygen saturation monitors are simple, non-invasive and objective detection methods for lower limb blood flow. A combination of both methods can improve the safety of surgery. Keeping the limbs warm and uses of spasmolytic drugs can facilitate the recovery of postoperative blood flow of lower limbs.