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      Safety zones for anterior abdominal wall entry during laparoscopy: a CT scan mapping of epigastric vessels.

      Annals of Surgery

      Abdominal Wall, blood supply, Epigastric Arteries, anatomy & histology, radiography, Female, Humans, Laparoscopy, Male, Middle Aged, Tomography, X-Ray Computed

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          Abstract

          To determine the efficacy of CT scan in mapping the superior and inferior epigastric vessels, relative to landmarks apparent at laparoscopy. Trauma to abdominal wall blood vessels occurs in 0.2% to 2% of laparoscopic procedures. Both superficial and deep abdominal wall vessels are at risk. The superficial vessels may be located by transillumination; however, the deep epigastric vessels cannot be effectively located by transillumination and, thus, other techniques should be used to minimize the risk of injury to these vessels. Abdominal and pelvic CT images of 100 patients were studied. The location of the superior and inferior epigastric vessels from the midline were determined at five levels, correlated with each other and with the patient age, body mass index, and history of midline laparotomy using Pearson's correlation coefficient and multivariate analysis. CT scan was successful in mapping the epigastric vessels in 95% of patients. At the xiphoid process level, the superior epigastric vessels (SEA) were 4.41 +/- 0.13 cm from the midline on the right and 4.53 +/- 0.14 cm on the left. Midway between xiphoid and umbilicus, the SEA were 5.50 +/- 0.16 cm on the right of the midline and 5.36 +/- 0.16 cm on the left. At the umbilicus, the epigastric vessels were 5.88 +/- 0.14 cm on the right and 5.55 +/- 0.13 on the left of the midline. Midway between the umbilicus and symphysis pubis, the inferior epigastric (IEA) were 5.32 +/- 0.12 cm on right and 5.25 +/- 0.11 cm on the left. At the symphysis pubis, the IEA were 7.47 +/- 0.10 cm on the right and 7.49 +/- 0.09 cm away from the midline on the left side. Epigastric vessels are usually located in the area between 4 and 8 cm from the midline. Staying away from this area will determine the safe zone of entry of the anterior abdominal wall.

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          Journal
          14745325
          1356210
          10.1097/01.sla.0000109151.53296.07

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