Recently, the efficacy and oncological safety of laparoscopy has been demonstrated for
treating colon cancer, and similar long-term results at 5-year confirmed by the several
multicenter study trial. However, conventional laparoscopic surgery for rectal cancer is
technically more difficult than colonic resection because of the confined space in the
pelvis and the limitations of existing laparoscopic instruments which have a restricted
range of movement compared with the provided by the surgeon's hand. Consequently, recent
studies which compared short-term outcomes between open and laparoscopic rectal resections
have reported higher rates of conversion to open surgery, positive circumferential margins,
and increased anastomotic leakage in patients who underwent laparoscopic approach.
The da VinciĀ® Surgical System (Intuitive surgical, Sunnyvale, CA, USA) was introduced as the
next advance in minimally invasive surgery to overcome the technical limitations of
laparoscopy. The advantages of robotic assistance include enhanced dexterity, improved
three-dimensional vision, and more intuitive instrument manipulation. This device eases the
technical challenges of the minimally invasive approach and may make a complex surgical task
more accessible to surgeons without extensive laparoscopic experience.
With its dependence on precise dissection in a narrow pelvic cavity, it is anticipated that
rectal cancer surgery is one of the indications most likely to benefit from robot
assistance. However, it is difficult to conclude whether robot assistance leads to better
outcomes because few studies have directly compared the three existing techniques. Although
robotic rectal excision has been reported to be safe and feasible in the recent literatures,
a number of these results were based on small number of case series. There have been no
randomized trials demonstrating the safety of robotic surgery in the treatment of rectal
cancer. This study is designed to assess the efficacy and safety of robotic surgery compared
with that of laparoscopic surgery for mid or low rectal cancer.
Interventional
Allocation: Randomized, Endpoint Classification: Safety/Efficacy Study, Intervention Model: Parallel Assignment, Masking: Open Label, Primary Purpose: Treatment
Surgical quality based on pathological examination
A comparison of completeness of total mesorectal excision
up to 4 weeks after operation
No
Gyu seog Choi, M.D
Study Chair
Kyunpook National Univercity Medical Center
South Korea: Institutional Review Board
KNUHCRC003
NCT01423214
August 2011
December 2018
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