Diagnostic ultrasound ( PDFDrive )

294 PART II Abdominal and Pelvic Sonography
A
B
FIG. 8.42 Mechanical Small Bowel Obstruction. (A) Sagittal image of right lank shows multiple, adjacent, long loops of dilated, luid-illed
small bowel with the classic morphology for a distal mechanical small bowel obstruction. (B) Transverse image in the left lower quadrant conirms
the multiplicity of dilated loops involved in the process. A small amount of ascites is seen between the dilated loops.
K
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B
FIG. 8.43 Dilated Hypoperistaltic Segments. (A) Sagittal sonogram in the right lank of a patient with a Crohn stricture shows gross dilation
of the ascending colon. A long, luid-sediment level is seen as a relection of the hypoperistalsis of this segment of obstructed gut. (B) Sagittal
sonogram in a patient with paralytic ileus shows extensive small bowel dilation. Loops are luid illed and quiet with luid-luid level (arrowheads).
See also Video 8.16. K, Kidney. (A with permission from Sarrazin J, Wilson SR. Manifestations of Crohn disease at US. Radiographics.
1996;16[3]:499-520. 21 )
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B
FIG. 8.44 Mechanical Small Bowel Obstruction: Ventral Hernia. (A) Sonogram shows dilated luid-illed loops of small bowel with edematous
valvulae conniventes. (B) Transverse paraumbilical sonogram shows normal-caliber gut lying in abnormal supericial location between two dilated
loops of small bowel (SB).