which of the following barium - filled anatomic structures is best demonstrated in the LAO position:
- A. hepatic flexure.
- B. splenic flexure.
- C. sigmoid colon.
- D. iliocecal valve.
The correct answer is d. iliocecal valve.
The LAO (left anterior oblique) position is a radiographic position in which the patient is lying on their left side with their right hip flexed and abducted. This position is used to visualize the iliocecal valve, which is located at the junction of the ileum and the cecum.
The other options are not as well visualized in the LAO position:
A. hepatic flexure:
The hepatic flexure is located at the junction of the transverse colon and the ascending colon. It is best visualized in the right posterior oblique (RPO) position.
B. splenic flexure:
The splenic flexure is located at the junction of the transverse colon and the descending colon. It is best visualized in the left posterior oblique (LPO) position.
C. sigmoid colon:
The sigmoid colon is located in the lower left quadrant of the abdomen. It is best visualized in the prone position.
Therefore, the iliocecal valve is the best demonstrated barium-filled anatomic structure in the LAO position.
