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ssss1 Veress needle.

Source: © 2014 Photo courtesy of KARL STORZ SE & CO, KG.

ssss1 Close up photograph of the specialized tip to a Veress needle.

Source: © 2014 Photo courtesy of KARL STORZ SE & CO, KG.

After an adequate volume of gas has been insufflated, the Veress needle is removed. In the blind technique for initial trocar insertion, a bladed trocar or trocar with a sharp obturator is inserted through an adequately sized incision. Trocar assemblies with sharp obturators are most commonly used in veterinary medicine; laparoscopic surgeons in human medicine tend to use bladed trocars. Bladed trocars are equipped with a spring‐loaded safety shield that retracts when passed through the abdominal wall. This is often accompanied by an audible click as the blade retracts. Advancement of the trocar assembly is stopped at this point, and the bladed trocar or sharp obturator is removed from its outer cannula. The laparoscope can then be inserted to confirm the successful placement of the cannula in the peritoneal cavity and to rule out intraabdominal injury from either Veress needle or trocar insertion. If the cannula is appropriately located, the insufflation tubing is connected to the gas port of the cannula, and insufflation to the predetermined pressure occurs. The remaining cannulas are then placed under direct visualization.