Intraoperative ultrasonography in AVM surgery

: Intraoperative ultrasonography was used for the surgical resection of arteriovenous malformations in three cases. In the first case, intraoperative ultrasonography clearly demonstrated residual micro-AVM, which had seemed to be resected completely during surgery. In the second case, diminished flow of the draining vein by clipping of the feeding artery was demonstrated by ultrasonography. In the third case, intraoperative ultrasonography revealed stasis of the flow in the varix by clipping of the feeding artery. Intraoperative ultrasonography is easy to use and less expensive compared with intraoperative digital subtraction angiography or MRI and it is also effective for identifying AVMs as well as the flow patterns of the feeding arteries or draining veins. Intraoperative ultrasonography is a useful device for AVM surgery.