Abstract
Orifice-assisted small-incision surgery (OASIS) is a new milestone in MIS. It incorporates benefits of single-incision and natural-orifice surgery and overcomes the challenges of both, like instrument and optical access clashing and instrument crowding thus allowing the performance of advanced laparoscopic procedures with ease. The optical access is gained via the posterior cul-de-sac by placing a flexible 13mm sigmoidoscope through a 15 mm trocar. Two 5 mm ports are placed on the either side of umbilicus. The steps of laparoscopic radical hysterectomy by the Pune technique were duplicated by this approach. The oncological clearance achieved was 3cm of paracervical margins and 2cm of distal vaginal margins, with a average nodal yield of 16 lymph nodes. OASIS appears to be a safe and feasible. The important drawbacks of single incision surgery are overcome by this technique. The oncological clearance is comparable to laproscopic radical hysterectomy.
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