Utility of gastrointestinal ultrasound in functional gastrointestinal disorders: A narrative review

Figure 2 shows the ascending colon and sigmoid colon images of a constipated patients. A: Image of ascending colon pre-treatment; B: Image of sigmoid colon pre-treatment; Note the strong reflections with acoustic shadow behind, suggestive of severe faecal loading; Colonic diameters are 34.6 mm and 27.5 mm respectively for ascending and sigmoid colon; C: Image of ascending colon post-treatment; D: Image of sigmoid colon post-treatment; Note the absence of strong reflections or acoustic shadows suggestive of minimal faecal loading; Colonic diameters of both ascending and sigmoid colon are also reduced post-treatment.