Positioning and number of cannulae placed (Figure 10.2.2, for the ileostomy formation) largely depend on the extent of intraabdominal manipulations expected. Most patients with "virgin" abdomens, not requiring extensive adhesiolysis, can be performed using a more limited number of cannulae, whereas a thorough inspection of the entire small
intestines may require at least four cannulae. Although it is tempting to minimize the number of cannulae, there should be no hesitation in inserting one or two additional 5-mm cannulae, if this will allow better exposure and easier manipulations of the tissues.
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