Dynamic ultrasonography for optimizing treatment position in superior mesenteric artery syndrome: Two case reports and review of literature

Figure 6 Dynamic ultrasonography images of case 2. A: Supine position showed the narrowed superior mesenteric artery-aorta (SMA-Ao) distance (5.3 mm); B: Left lateral position did not improve the SMA-Ao distance (5.3 mm); C and D: Right lateral position and sitting position increased the SMA-Ao distance to 6.6 and 7.0 mm, respectively. SMA: Superior mesenteric artery; Ao: Aorta.