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. Author manuscript; available in PMC: 2009 Jan 1.
Published in final edited form as: Best Pract Res Clin Gastroenterol. 2008;22(4):601–616. doi: 10.1016/j.bpg.2007.12.007

Figure 6.

Figure 6

Radiographs taken sequentially during a swallow of a patient with a small axial hiatal hernia, a well developed A ring, and a well developed B ring evident. In such cases the criterion for defining hiatus hernia is that the measurement from the B ring to the diaphragmatic hiatus exceed 2 cm. This distance is indicated by the black bracket in the image on the left, obtained early in the swallow sequence, and the white bracket in the image on the right, obtained late in the swallow sequence. The black bracket from the left image is superimposed on the right making the point that size estimate of a sliding hiatus hernia will vary depending on when in the swallow sequence the measurement is made.