Cannulas should be positioned in a half circle or line facing toward the site of pathology. Thus, for jejunal surgery, the half circle will open toward the right upper quadrant (Figure 8.1.2), whereas for ileal surgery,
it will open toward the left upper quadrant. In many cases, only 2-3 cannulae are used to accomplish a diagnostic laparoscopy and to localize the pathology. A fourth cannula in the suprapubic area may be helpful in certain cases and should be placed readily if this may be helpful for retraction or exposure. Alternatively, for ileal surgery, the suprapubic cannula may be preferable and the right lower quadrant one may be eliminated.
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