Oral Iohexol in the Management of Chylous Ascites After After Retroperitoneal or Extended Lymphadenectomy

March 4, 2026 updated by: Cancer Institute and Hospital, Chinese Academy of Medical Sciences

Oral Iohexol in the Management of Chylous Ascites After Retroperitoneal or Extended Lymphadenectomy for Abdominal or Pelvic Malignant Tumor: An Innovative and Convenient Treatment

The goal of this clinical trial is to assess the effectiveness of oral iohexol in the treatment of postoperative chylous ascites. It will also learn about the safety of oral iohexol. The main questions it aims to answer are:

  • Confirm the potential of oral iohexol as an innovative therapeutic regimen.
  • Confirm its ability to improve clinical outcomes for patients.

Study Overview

Status

Completed

Conditions

Intervention / Treatment

Study Type

Interventional

Enrollment (Actual)

42

Phase

  • Phase 2

Contacts and Locations

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

Study Locations

  • China
    • Beijing Municipality
      • Beijing, Beijing Municipality, China, 100021
        • Cancer Institute and Hospital, Chinese Academy of Medical Sciences

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:

  • Patients between the ages of 18 and 75 years;
  • Patients underwent retroperitoneal or extended lymphadenectomy for abdominal or pelvic malignant tumors;
  • Patients diagnosisted with postoperative Chylous ascites. Chylous ascites were defined by the presence of non-infectious, milky, or creamy effluent in drainage tubes surpassing 200 mL daily, paired with triglyceride concentrations exceeding 110 mg/dL

Exclusion Criteria:

  • Patients with severe cardiac, hepatic and renal insufficiency;
  • Patients with a history of iohexol allergy or allergy to contrast media;
  • Patients who have received other interventions;
  • Patients with severe intestinal obstruction or intestinal perforation;
  • Patients who are unable to comply with the requirements of the study or are unable to complete follow-up.

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: N/A
  • Interventional Model: Single Group Assignment
  • Masking: None (Open Label)

Arms and Interventions

Participant Group / Arm
Intervention / Treatment
Experimental: oral iohexol group
Drug: oral iohexol
Upon diagnosing chylous ascites, patients received oral iohexol treatment, a critical intervention in our therapeutic armamentarium. The initial oral dose was standardized to ensure a balance between efficacy and patient safety. In the event of a less than optimal response or significant drainage within the first 24 hours, a second identical dose of Iohexol was considered to maintain therapeutic concentration levels in the body.
Procedure: Lymphangiography and Embolization

When conservative methods fall short in resolving chylous ascites, our protocol advances to precise interventional treatments. The escalation begins with ultrasound-guided lymphangiography. Through unilateral or bilateral inguinal lymph node access, iodized oil contrast is infused via a 9 ml/hour micro-pump, meticulously monitored by fluoroscopic imaging at 3-5 minutes intervals.

Following precise localization of the leakage site, embolization is performed with a sequence of carefully calibrated steps. The process entails cone-beam CT scanning and 3D reconstruction for a clear depiction of the leak, followed by direct needle access to the lymphatic rupture under DSA guidance. A fine guidewire is inserted above the rupture, which facilitates the delivery of an embolizing mixture of iodized oil and NBCA glue. This is done with the utmost precision to prevent any spillage, ensuring the embolization's success and marking the conclusion of the procedure.

What is the study measuring?

Primary Outcome Measures

Outcome Measure
Measure Description
Time Frame
grading system for efficacy of iohexol intervention
Time Frame: up to 3 weeks after the intervention
The clinical responses post-Iohexol administration were evaluated against a set grading system:Grade A Success: This grade was assigned to patients who achieved complete cessation of lymphatic drainage with no clinical evidence of chylous ascites by the end of the first week post-treatment. To further ascertain the rapid action of Iohexol, 'Grade A+ Success' was defined for scenarios where this resolution occurred within the initial 3 days post-intervention. Grade B Success: Representing a substantial but partial therapeutic response, Grade B was denoted for patients who exhibited more than a 50% reduction in baseline lymphatic drainage within the first week, but did not meet the criteria for Grade A success. Non-responders: Patients who did not conform to the criteria for Grade A or B success were categorized as non-responders. This group was identified for further evaluation and considered for additional treatment modalities.
up to 3 weeks after the intervention

Collaborators and Investigators

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

Sponsor

Cancer Institute and Hospital, Chinese Academy of Medical Sciences

Publications and helpful links

The person responsible for entering information about the study voluntarily provides these publications. These may be about anything related to the study.

General Publications

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)

February 15, 2025

Primary Completion (Actual)

December 31, 2025

Study Completion (Actual)

December 31, 2025

Study Registration Dates

First Submitted

January 16, 2025

First Submitted That Met QC Criteria

February 8, 2025

First Posted (Actual)

February 11, 2025

Study Record Updates

Last Update Posted (Actual)

March 6, 2026

Last Update Submitted That Met QC Criteria

March 4, 2026

Last Verified

December 1, 2025

More Information

Terms related to this study

Keywords

Additional Relevant MeSH Terms

Other Study ID Numbers

  • No, 24/368-4648

Plan for Individual participant data (IPD)

Plan to Share Individual Participant Data (IPD)?

NO

Drug and device information, study documents

Studies a U.S. FDA-regulated drug product

Yes

Studies a U.S. FDA-regulated device product

No

product manufactured in and exported from the U.S.

Yes

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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