As many jejunal segments as possible should be included. If mechanical ileus is suspected, an effort should be made to trace the entirety of the gastrointestinal tract. If this is not possible, all abnormally dilated intestinal segments should be traced orad and aborad until obstruction is confirmed or ruled out. For each gastrointestinal segment, the wall layering, thickness, echogenicity of the mucosa, and luminal contents should be evaluated and documented.17–24 For wall thickness measurements, calipers are set at the hyperechoic border of the serosa and the hyperechoic mucosal luminal interface. Measurement of small intestinal wall thickness is variably reported in the literature in both a longitudinal or transverse plane.17–20 The panel’s consensus is that small intestinal wall thickness should ideally be measured in a longitudinal plane to avoid measurement error caused by obliquity and care should be taken that both walls are equal in wall layer definition and wall thickness to ensure reliable transducer placement in the center of the bowel loop. If measured in transverse, care should be taken to obtain a view perpendicular to the long axis of the bowel loop to avoid obliquity. Gastric wall measurements should be performed between two rugal folds in a transverse image plane. Degree of luminal distension should be noted as it may affect wall thickness measurements. If clinically indicated, peristalsis of the stomach and jejunum should be assessed over the time period of one minute. The stomach should be scanned from the fundus to the pyloroduodenal junction. Intercostal windows may be necessary in some dogs to document the fundus and the pylorus. The duodenum should be scanned either from a subcostal or intercostal window depending on body conformation. The jejunum should be traced at the cranial, left, caudal, and right parts of the abdomen. The ileocecocolic