Hybrid RAS study

Recruitment & Eligibility

Inclusion Criteria

Patients whose age at registration is 18 years or older.
Patients who are histologically proven to be colon cancer.
Preoperative diagnosis of curative primary resection.
Main tumor site is cecum (C), ascending colon (A) , sigmoid colon (S) or rectosigmoid colon (RS) and robotic-surgery with D2 or higher lymph node dissection is pre-planned.
Clinical stage I to IIIC (T1-4b, N0-2b, M0: TNM Classification) has been diagnosed.
Patients with General State Performance Status(ECOG) 0 to 1.
Patients whose functions of the main organs are adequately maintained and judged to be safe for surgery by the doctor in charge of examination with in 28 days prior to the registration.
Patients who have the judgment to fully understand the research content.
Patients with written informed consent to participate in this study.

Exclusion Criteria

Patients planning combined resection of other organs due to infiltration of other organs
Patients with chemotherapy (systemic anti-cancer drug treatment) and a history of radiation therapy, including treatment for other cancer species.
Patients who have a history of open surgery.
Patients who have a history of laparoscopic stomach resection or colectomy.
Patients planning simultaneous resection of other organs due to double cancer.
Patients scheduled to anastomosis at more than two sites due to multiple colon cancer.
Patients with intraperitoneal infection.
Patients with serious complications.
Other patients judged inappropriate by the examining physician.

Study & Design

Primary Outcome Measures

Name	Time	Method
-		Operating time

Secondary Outcome Measures

Name	Time	Method
Anastomosis time		Anastomosis time (min)
Loss of blood volume		loss of blood volume(mL)
Complications during surgery		Complications during surgery
Postoperative first flatus		The date of postoperative first flatus
Postoperative first bowel movement		postoperative first bowel movement
Postoperative diet resumption		postoperative diet resumption
White blood cell count	3 days after surgery	White blood cell count
CRP	3 days after surgery	CRP
Number of dissected lymph nodes		Number of dissected lymph nodes
Proximal margin		Proximal margin(PM)
Distal margin		distal margin(DM)
Assessment of surgeon stress		Assessment of surgeon stress(SURG TLX score)
Assessment of surgeon satisfaction		Assessment of surgeon satisfaction(VAS score)
Rehospitalization		Rehospitalization
Reoperation		Reoperation
Postoperative complications		Postoperative complications
Disease-free interval/rate	Year 3, Year 5	Disease-free interval/rate(Year 3, Year 5)
Overall survival period/rate	Year 3, Year 5	overall survival period/rate(Year 3, Year 5)
Cost of surgery		Cost of surgery

Recruitment & Eligibility