Single-port Versus Conventional Laparoscopic Surgery for Radical Proximal Gastric Cancer: A Randomized Controlled Trial

May 8, 2026 updated by: First Affiliated Hospital of Wenzhou Medical University

A Prospective, Single-center, Randomized Control Led Study of Laparoscopic Single-port Surgery System Versus Traditional Laparoscopic Surgery in Radical Proximal Gastric Cancer

To evaluate the safety and efficacy of SP1000 and conventional laparoscopy in radical gastrectomy for proximal gastric cancer.

Study Overview

Status

Recruiting

Conditions

Intervention / Treatment

Study Type

Interventional

Enrollment (Estimated)

90

Phase

  • Not Applicable

Contacts and Locations

This section provides the contact details for those conducting the study, and information on where this study is being conducted.

Study Contact

Study Locations

  • China
    • Zhejiang
      • Wenzhou, Zhejiang, China
        • Recruiting
        • The First Affiliated Hospital of Wenzhou Medical University
        • Contact:

Participation Criteria

Researchers look for people who fit a certain description, called eligibility criteria. Some examples of these criteria are a person's general health condition or prior treatments.

Eligibility Criteria

Ages Eligible for Study

  • Adult
  • Older Adult

Accepts Healthy Volunteers

No

Description

Inclusion Criteria:

  • Age between 18 and 75 years inclusive.

ECOG performance status ≤ 2.

Histologically confirmed proximal gastric cancer or Siewert type II adenocarcinoma of the esophagogastric junction.

Clinical stage cT1-T3, N0-N+, M0.

Tumor maximum diameter ≤ 4 cm and esophageal invasion ≤ 2 cm.

Candidates for radical proximal gastrectomy (PG) with feasibility of R0 resection and functional anastomosis.

Assessed by a Multidisciplinary Team (MDT) as suitable for PG rather than total gastrectomy, with no requirement for neoadjuvant therapy.

Radiographic evidence of localized disease (no distant metastasis to liver, lung, or peritoneum via enhanced CT or MRI).

ASA physical status classification ≤ III.

Adequate bone marrow, hepatic, renal, cardiac, and pulmonary function.

Ability to understand and provide written informed consent.

Willingness and ability to comply with the 12-month postoperative follow-up schedule.

Exclusion Criteria:

  • Clinical stage T4 or presence of distant metastasis.

Esophageal invasion exceeding 2 cm.

History of previous major gastric surgery (e.g., partial or total gastrectomy).

Other malignant tumors within the last 5 years.

Severe organic diseases that preclude safe anesthesia or surgery (e.g., severe heart failure, pulmonary fibrosis).

Requirement for emergency surgery due to active gastric bleeding, perforation, or acute obstruction.

Pregnant or lactating women.

Serious psychiatric disorders or cognitive impairment that interferes with study compliance.

Any other condition that, in the opinion of the investigator, would make the participant unsuitable for the study.

Study Plan

This section provides details of the study plan, including how the study is designed and what the study is measuring.

How is the study designed?

Design Details

  • Primary Purpose: Treatment
  • Allocation: Randomized
  • Interventional Model: Parallel Assignment
  • Masking: None (Open Label)

Arms and Interventions

Participant Group / Arm
Intervention / Treatment
Experimental: Single-Port Group
Participants in this group will undergo radical proximal gastrectomy utilizing the SP1000 single-port surgical platform. The procedure focuses on performing the main surgical maneuvers through a centralized access point to evaluate the safety and clinical performance of the robotic system.
Device: Single-Port Robotic Surgical System
An investigational robotic-assisted surgical platform designed for single-port access. In this study, the system is utilized to perform radical proximal gastrectomy. The core surgical procedures are conducted through a centralized access point to assess the intraoperative safety and short-term clinical outcomes of this robotic-assisted approach.
Active Comparator: Traditional Laparoscopy Group
Procedure: Traditional Laparoscopic Surgery
Standard multi-port laparoscopic radical proximal gastrectomy performed as a clinical control. This procedure follows conventional laparoscopic techniques involving multiple abdominal incisions for the placement of surgical instruments and camera to treat proximal gastric cancer.

What is the study measuring?

Primary Outcome Measures

Outcome Measure
Measure Description
Time Frame
Incidence of Total Postoperative Complications (Clavien-Dindo Grade ≥ II)
Time Frame: Within 30 days postoperatively.
The proportion of participants experiencing at least one postoperative complication graded II or higher according to the Clavien-Dindo Classification. This includes surgery-related, systemic, and anesthesia-related complications. If a patient experiences multiple complications, only the most severe grade will be used for statistical analysis.
Within 30 days postoperatively.

Secondary Outcome Measures

Outcome Measure
Measure Description
Time Frame
Estimated Blood Loss
Time Frame: During the surgical procedure (Day 0).
The amount of blood lost during the surgical procedure, measured in milliliters (mL).
During the surgical procedure (Day 0).
Time to First Flatus
Time Frame: Up to 30 days postoperatively.
The time from the end of surgery until the participant's first passage of flatus, measured in days.
Up to 30 days postoperatively.
Total Operation Time
Time Frame: During the surgical procedure (Day 0).
The duration from the initial skin incision to the completion of skin closure, measured in minutes.
During the surgical procedure (Day 0).
Conversion Rate
Time Frame: During the surgical procedure (Day 0).
The proportion of participants in the Single-Port group who require conversion to traditional multi-port laparoscopy or open surgery due to technical or safety factors.
During the surgical procedure (Day 0).

Collaborators and Investigators

This is where you will find people and organizations involved with this study.

Sponsor

First Affiliated Hospital of Wenzhou Medical University

Study record dates

These dates track the progress of study record and summary results submissions to ClinicalTrials.gov. Study records and reported results are reviewed by the National Library of Medicine (NLM) to make sure they meet specific quality control standards before being posted on the public website.

Study Major Dates

Study Start (Actual)

November 5, 2025

Primary Completion (Estimated)

September 30, 2027

Study Completion (Estimated)

September 30, 2027

Study Registration Dates

First Submitted

May 8, 2026

First Submitted That Met QC Criteria

May 8, 2026

First Posted (Actual)

May 14, 2026

Study Record Updates

Last Update Posted (Actual)

May 14, 2026

Last Update Submitted That Met QC Criteria

May 8, 2026

Last Verified

May 1, 2026

More Information

Terms related to this study

Additional Relevant MeSH Terms

Other Study ID Numbers

  • KY2025-143
  • ChiCTR2500109905 (Other Identifier: Chinese Clinical Trial Registry)

Drug and device information, study documents

Studies a U.S. FDA-regulated drug product

No

Studies a U.S. FDA-regulated device product

No

This information was retrieved directly from the website clinicaltrials.gov without any changes. If you have any requests to change, remove or update your study details, please contact register@clinicaltrials.gov. As soon as a change is implemented on clinicaltrials.gov, this will be updated automatically on our website as well.

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