The cannulae are positioned in the umbilical region (above or below, depending on the size of the patient). If the patient is thin, just below the umbilicus is usually best. If the patient has a large and dependent pannus, somewhere above the umbilicus is better, usually about 23-25 cm above the symphysis pubis. Other cannulae are placed in the right and left upper and lower lateral abdominal wall. The proposed stoma site is not used for a cannula, because this is almost always located too far medial (Figure 8.6.2).
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