Figure 1. Intraoperative ultrasound images. (A-D ) The
TT in the IVC; the lowest 2 cm below the level of renal vein confluence,
the upper boundary reaches the right atrium, close to the posterior wall
of the right atrium, approximately 1 cm long. (E-G ) TT in the
right renal vein fills the lumen; TT can be seen in the trunk of the
left renal vein and left adrenal vein. The TT in the left adrenal vein
was approximately 1 cm long, but no TT was found in the renal vein at
the left renal hilum.