In an effort to decrease the incidence of injuries associated with the blind penetration of the abdominal cavity during laparoscopy, Hasson [12] proposed a mini‐laparotomy technique. He developed a reusable device similar to a standard laparoscopic port with a corkshaped sleeve on the outside. The sleeve could be slid up or down on the cannula shaft depending on the thickness of the patient's abdominal wall [11]. Sutures in the fascia were used to anchor the outer sleeve and to create an airtight seal. Hasson‐type cannulas that are fixed to the abdominal wall between a balloon and a dense foam cuff are also now commercially available.

In the open technique, the peritoneal cavity is entered under direct visualization. Theoretical advantages to the open technique may include a decreased likelihood of injury to adherent bowel or major vascular injuries during initial trocar insertion. Potential disadvantages may include increased operative time (especially in obese patients) and an increased risk of late port‐related complications such as hematoma, wound infection, or hernia [13]. Leakage of gas around the cannula is occasionally a problem. If resulting in a loss of pneumoperitoneum, sutures may be placed around the cannulas to act as a purse string.