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abd comp posit qs

abdomen comp positioning questions

QuestionAnswer
What is demonstrated on an AP abdominal radiograph? size and shape of liver, spleen, kidneys, intraabdominal calcifications, evidence of tumor masses
What is the CR entry for a supine AP abdomen (KUB)? perpendicular to the IR at the level of the iliac crests (L4)
What is the CR entry for an upright AP abdomen? horizontal entering 2” above the crests
Why would we do an upright abdomen as opposed to a KUB? for free air, must include the diaphragm
Why would we do a PA abdomen in place of an AP? when the kidneys are not of primary concern, a PA projection greatly reduced pt. gonadal dose
When performing a decubitus abdomen what steps should be taken to ensure fluid levels are accurately demonstrated? allow the patient the lay for a few minutes before the exposure is taken, and wait a couple seconds after exhalation for the exposure to allow fluids to settle
What is the pt. position for a decubitus abdomen? pt. lays on L. side, flex knees and extend arms. Allow fluid to settle
Why must a decubitus abdomen be done on the left side? so that air in the fundus is not mistaken for free air
What is the CR entry for a lateral decubitus AP abdomen? horizontal, perpendicular to the center of the IR, entering at the level of the iliac crests
Where should the CR be directed if the diaphragm must be demonstrated? 2” above the level of the crests
Where should the CR be directed for a cross table decubitus abdomen? entering the MCP 2” above the crests
How should a decubitus abdominal film be marked? mark the side up
What are the main evaluation criteria points for a KUB? pubic symphysis to upper abdomen included, proper patient alignment, no patient rotation, soft tissue grays demonstrate necessary anatomy
What are the main evaluation points for an upright abdomen? pubic symphysis to upper abdomen included, proper patient alignment, no patient rotation, soft tissue grays demonstrate necessary anatomy, diaphragm without motion, density similar to KUB, appropriate marking (upright).
What evaluation points indicate proper patient alignment? centered vertebral column, ribs hips and pelvis equidistant to edges of radiograph
What evaluation points indicate no patient rotation? spinous processes centered over lumbar vertebrae, ischial spines symmetric, alae symmetric
What evaluation points describe the necessary demonstrated soft tissues? lateral abdominal wall and properitoneal fat layer, psoas muscles lower border of the liver and kidneys, inferior ribs, transverse processes of L-spine, R or L marker visible and out of anatomy
Created by: annaluz87