Robotic Natural Orifice Specimen Extraction Surgery Compared to Robotic Assisted Surgery for Median Rectal Cancer

NCT06454201 | Completed

• 1 other identifier: IIT2024013
• Study Type: interventional
• Target: 150
• Locations: 1 country
• Sites: 1

Brief Summary

The purpose of this study is to evaluate the short-term outcomes of roboric natural orifice specimen extraction surgery (NOSES-II) compared to conventional assisted robotic surgery in the treatment of median rectal cancer. The main question it aims to answer is: is it safe and feasible to perform roboric natural orifice specimen extraction surgery (NOSES-II) for median rectal cancer? What are the advantages of roboric natural orifice specimen extraction surgery (NOSES-II) compared to conventional assisted robotic surgery for median rectal cancer.

Conditions

Natural Orifice Specimen Extraction Surgery; Middle Rectal Cancer; Robotic; Short-term Outcomes

Outcome Measures

Primary Outcomes (3)

• The rate of all complications

  incidence rate

  1 months after surgery

• The rate of all complications (Clavien-Dindo grade ≥ III )

  incidence rate

  1 months after surgery

• The rate of anastomotic complications

  Anastomotic leakage and anastomotic bleeding

  1 months after surgery

Secondary Outcomes (4)

• operative time

  Intraoperative

• estimation of blood loss

  Intraoperative

• postoperative hospital stay

  1 day after operation

• visual analogue pain score

  1 weeks after surgery

Study Arms (2)

robotic natural orifice specimen extraction surgery for middle rectal cancer

ACTIVE COMPARATOR

After the body is free, the tumor segment of the bowel is pulled out through the anus. Excise the tumor segment of the colon outside the anus.

Procedure: robotic natural orifice specimen extraction surgery

robotic transabdominal specimen extraction surgery for middle rectal cancer

SHAM COMPARATOR

After internal mobilization, the tumor segment of the bowel was removed through an abdominal incision. Excise the tumor segment of the bowel outside the incision.

Procedure: robotic transabdominal specimen extraction surgery

Interventions

robotic natural orifice specimen extraction surgery PROCEDURE

After the rectum and its mesorectum were dissociated, the rectum was transected at 2 cm below the tumor by using a linear stapler. Then the rectal stump was incised and disinfected with iodophor, the protective sleeve was placed into the abdominal cavity through the assistant hole. An assistant delivered oval forceps into the pelvic cavity through the anus and used oval forceps to grip one end of the protective sleeve. Then slowly pulled out the protective sleeve. Eventually, one end of the protective sleeve was placed inside the abdominal cavity and the other outside the anus, completely covering the rectal stump and the perianal area. Tumor was pulled out of the rectal stump, then the colon was then disconnected at 10 cm above the tumor. The anvil was placed into the stump of the sigmoid colon and disinfected with iodophor, and then the anvil was delivered into the abdominal cavity. Place a circular stapler through the anus for end-to-end anastomosis of the rectum and sigmoid colon.

robotic natural orifice specimen extraction surgery for middle rectal cancer

robotic transabdominal specimen extraction surgery PROCEDURE

After the rectum and its mesorectum were dissociated, the rectum was transected at 2 cm below the tumor by using a linear stapler. Take a 6cm incision through the rectus abdominis muscle in the lower left abdomen and place an incision protective cover. Cut off the intestinal tube 10cm from the upper edge of the tumor and place a stapler base. The rectal stump was sutured with purse-string suture. Place a circular stapler through the anus for end-to-end anastomosis of the rectum and sigmoid colon. After completion of digestive tract reconstruction. The pelvic and abdominal cavities were washed repeatedly with normal saline until there were no blood remained. Close the abdominal cavity layer by layer.

robotic transabdominal specimen extraction surgery for middle rectal cancer

Eligibility Criteria

• Age: 18 Years - 80 Years
• Sex: all
• Healthy Volunteers: No
• Age Groups: Adult (18-64), Older Adult (65+)

You may qualify if:

• The age is more than 18 years old and less than or equal to 85 years old
• Eastern Cooperative Oncology Group score ≤2
• Preoperative pathological diagnosis of rectal adenocarcinoma
• cT1-3NxM0 median rectal cancer defined by preoperative contrast-enhanced MRI
• The maximum diameter of tumor ≤5cm on preoperative enhanced MRI
• The body can tolerate the operation and sign the informed consent

You may not qualify if:

• multiple primary colorectal cancer
• recurrent rectal cancer
• preoperative neoadjuvant chemoradiotherapy
• complicated with intestinal obstruction or intestinal bleeding requiring emergency surgery
• previous anal surgery history
• BMI≥30kg/m2
• severe mental illness

Sponsors & Collaborators

• Nanchang University: lead

Study Sites (1)

the First Affiliated Hospital of Nanchang University

Nanchang, Jiangxi, 330000, China

Location

Study Officials

• shanping Ye

  The First Affiliated Hospital of Nanchang University

  STUDY CHAIR

Study Design

• Study Type: interventional
• Phase: not applicable
• Allocation: RANDOMIZED
• Masking: DOUBLE
• Who Masked: PARTICIPANT, OUTCOMES ASSESSOR
• Purpose: TREATMENT
• Intervention Model: PARALLEL
• Sponsor Type: OTHER
• Responsible Party: PRINCIPAL INVESTIGATOR
• PI Title: professor

Study Record Dates

• First Submitted: June 6, 2024
• First Posted: June 12, 2024
• Study Start: January 1, 2023
• Primary Completion: December 31, 2025
• Study Completion: December 31, 2025
• Last Updated: January 30, 2026

Record last verified: 2025-06

Data Sharing

• IPD Sharing: Will not share

Locations

CN (1)