A Study on the Combination of Tongluo Huayu Formula in Treating RVO of Phlegm-Stasis Intertwinement Type: Based on the Mechanism of Systemic Metabolic Regulation Mediated by Gut Microbiota

July 17, 2026 updated by: First Affiliated Hospital of Zhejiang University

A Study on the Combination of Tongluo Huayu Formula in Treating Retinal Vein Occlusion of Phlegm-Stasis Intertwinement Type: Based on the Mechanism of Systemic Metabolic Regulation Mediated by Gut Microbiota

The goal of this clinical trial is to evaluate the synergistic efficacy and safety of the Tongluo Huayu Formula combined with conventional Western medical treatment for RVO, thereby providing high-quality evidence to support its subsequent clinical promotion and application.

The control group will receive conventional Western medical therapy, including laser photocoagulation and intravitreal Conbercept injection. Specifically, Conbercept will be injected intravitreally once a month for 3 consecutive months. If large areas of retinal non-perfusion or fundus neovascularization occur during the study period, laser photocoagulation will be administered based on the patient's condition. The experimental group will receive the Tongluo Huayu Formula in addition to the standard therapy provided to the control group. The Tongluo Huayu Formula will be administered for 1 month. Relevant examinations and assessments for participants in both groups will be conducted at baseline (before treatment), and at 1, 2, 3, and 6 months after treatment.

Study Overview

Status

Status

Indicates the current recruitment status or the expanded access status.
Not yet recruiting

Conditions

Conditions

The disease, disorder, syndrome, illness, or injury that is being studied. On ClinicalTrials.gov, conditions may also include other health-related issues, such as lifespan, quality of life, and health risks.

Intervention / Treatment

Intervention / Treatment

A process or action that is the focus of a clinical study. Interventions include drugs, medical devices, procedures, vaccines, and other products that are either investigational or already available. Interventions can also include noninvasive approaches, such as education or modifying diet and exercise.

Study Type

Study Type

Describes the nature of a clinical study. Study types include interventional studies (also called clinical trials), observational studies (including patient registries), and expanded access.
Interventional

Enrollment (Estimated)

Enrollment

The number of participants in a clinical study. The "anticipated" enrollment is the target number of participants that the researchers need for the study.
80

Phase

Phase

The stage of a clinical trial studying a drug or biological product, based on definitions developed by the U.S. Food and Drug Administration (FDA). The phase is based on the study's objective, the number of participants, and other characteristics. There are five phases: Early Phase 1 (formerly listed as Phase 0), Phase 1, Phase 2, Phase 3, and Phase 4. Not Applicable is used to describe trials without FDA-defined phases, including trials of devices or behavioral interventions.
  • 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 Contact

The name and contact information for the person who can answer enrollment questions for a clinical study. Each location where the study is being conducted may also have a specific contact, who may be better able to answer those questions.

Study Locations

  • China
    • Zhejiang
      • Hangzhou, Zhejiang, China, 310003
        • The First Affiliated Hospital, Zhejiang University School of Medicine
        • 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

Eligibility Criteria

The key requirements that people who want to participate in a clinical study must meet or the characteristics they must have. Eligibility criteria consist of both inclusion criteria (which are required for a person to participate in the study) and exclusion criteria (which prevent a person from participating). Types of eligibility criteria include whether a study accepts healthy volunteers, has age or age group requirements, or is limited by sex.

Ages Eligible for Study

  • Adult
  • Older Adult

Accepts Healthy Volunteers

No

Description

Inclusion Criteria:

  • Patients who meet the aforementioned Western diagnostic criteria and TCM syndrome differentiation criteria for RVO, and are complicated with macular edema.
  • Patients who fully understand the study and voluntarily sign the informed consent form.

Exclusion Criteria:

  • Patients currently participating in other clinical trials or receiving concomitant use of similar traditional Chinese medicines or other therapies.
  • Patients with other fundus retinal diseases, such as neovascular glaucoma or iris neovascularization.
  • Patients with severe systemic diseases, such as rheumatism or systemic lupus erythematosus.
  • Women who are pregnant or breastfeeding (lactating).
  • Patients with severe cardiovascular or cerebrovascular diseases, or those with severely impaired hepatic or renal function.

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

Participant Group / Arm

A group or subgroup of participants in a clinical trial that receives a specific intervention/treatment, or no intervention, according to the trial's protocol.
Intervention / Treatment

Intervention / Treatment

A process or action that is the focus of a clinical study. Interventions include drugs, medical devices, procedures, vaccines, and other products that are either investigational or already available. Interventions can also include noninvasive approaches, such as education or modifying diet and exercise.
Experimental: Experimental Group
Combined TCM and Western Medicine
Drug: Conbercept Ophthalmic Injection
Intravitreal injection of Conbercept will be administered once a month for 3 consecutive months.
Other: Tongluo Huayu Formula
The Tongluo Huayu Formula will be administered for 1 month.
Procedure: Laser Photocoagulation
Laser photocoagulation will be administered if large areas of retinal non-perfusion or fundus neovascularization occur.
Active Comparator: Control Group
Conventional Western Medicine Only
Drug: Conbercept Ophthalmic Injection
Intravitreal injection of Conbercept will be administered once a month for 3 consecutive months.
Procedure: Laser Photocoagulation
Laser photocoagulation will be administered if large areas of retinal non-perfusion or fundus neovascularization occur.

What is the study measuring?

Primary Outcome Measures

Primary Outcome Measures

In a clinical study's protocol, the planned outcome measure that is the most important for evaluating the effect of an intervention/treatment. Most clinical studies have one primary outcome measure, but some have more than one.
Outcome Measure
Measure Description
Time Frame
Central Macular Thickness（CMT）
Time Frame: Baseline, and at 1, 2, 3, and 6 months after treatment.
Central Macular Thickness (CMT) measured by Optical Coherence Tomography Angiography (OCTA) in micrometers (μm).
Baseline, and at 1, 2, 3, and 6 months after treatment.

Secondary Outcome Measures

Secondary Outcome Measures

In a clinical study's protocol, a planned outcome measure that is not as important as the primary outcome measure for evaluating the effect of an intervention but is still of interest. Most clinical studies have more than one secondary outcome measure.
Outcome Measure
Measure Description
Time Frame
Best Corrected Visual Acuity(BCVA)
Time Frame: Baseline, and at 1, 2, 3, and 6 months after treatment
Best Corrected Visual Acuity (BCVA) assessed using the standard logarithmic visual acuity chart, reported as LogMAR score.
Baseline, and at 1, 2, 3, and 6 months after treatment
Superficial retinal capillary plexus vessel density(VD-SCP)
Time Frame: Baseline, and at 1, 2, 3, and 6 months after treatment
Superficial retinal capillary plexus vessel density (VD-SCP) measured by OCTA, reported as percentage (%) of vessel area.
Baseline, and at 1, 2, 3, and 6 months after treatment
Deep retinal capillary plexus vessel density (VD-DCP)
Time Frame: Baseline, and at 1, 2, 3, and 6 months after treatment
Deep retinal capillary plexus vessel density (VD-DCP) measured by OCTA, reported as percentage (%) of vessel area.
Baseline, and at 1, 2, 3, and 6 months after treatment
Foveal Avascular Zone area(FAZ)
Time Frame: Baseline, and at 1, 2, 3, and 6 months after treatment
Foveal Avascular Zone area(FAZ) measured by Optical Coherence Tomography Angiography (OCTA) in Square millimeters (mm²).
Baseline, and at 1, 2, 3, and 6 months after treatment
Ganglion Cell Layer Thickness(GCL)
Time Frame: Baseline, and at 1, 2, 3, and 6 months after treatment
Ganglion Cell Layer Thickness(GCL) measured by Optical Coherence Tomography Angiography (OCTA) in micrometers (μm).
Baseline, and at 1, 2, 3, and 6 months after treatment
Ganglion Cell-Inner Plexiform Layer Thickness
Time Frame: Baseline, and at 1, 2, 3, and 6 months after treatment
Ganglion Cell-Inner Plexiform Layer Thickness measured by Optical Coherence Tomography Angiography (OCTA) in micrometers (μm).
Baseline, and at 1, 2, 3, and 6 months after treatment
Carotid plaque
Time Frame: Baseline, and at 3 and 6 months after treatment
Presence of carotid plaque (yes/no) measured by B-mode ultrasound.
Baseline, and at 3 and 6 months after treatment
Retinal circulation time
Time Frame: Baseline, and at 3 and 6 months after treatment
Retinal circulation time measured by fundus fluorescein angiography (FFA) in Seconds (s)- typically arm-to-retina circulation time.
Baseline, and at 3 and 6 months after treatment
Retrobulbar blood flow
Time Frame: Baseline, and at 3 and 6 months after treatment
Retrobulbar blood flow parameters measured by color Doppler ultrasound include peak systolic velocity (PSV, cm/s) and end-diastolic velocity (EDV, cm/s) and resistive index (RI).
Baseline, and at 3 and 6 months after treatment
Gut microbiota
Time Frame: Baseline, and at 1, 2, 3, and 6 months after treatment
Gut microbiota measured by 16S rRNA sequencing include Alpha diversity (e.g., Shannon index) or Relative abundance of specific taxa (%).
Baseline, and at 1, 2, 3, and 6 months after treatment

Other Outcome Measures

Other Outcome Measures

For clinical trials, a planned measurement described in the protocol that is used to determine the effect of an intervention/treatment on participants. For observational studies, a measurement or observation that is used to describe patterns of diseases or traits, or associations with exposures, risk factors, or treatment. Types of outcome measures include primary outcome measure and secondary outcome measure.
Outcome Measure
Measure Description
Time Frame
Temperature
Time Frame: Baseline, and at 3 and 6 months after treatment
Temperature measured by an electronic thermometer in degrees Celsius (°C).
Baseline, and at 3 and 6 months after treatment
Heart rate
Time Frame: Baseline, and at 3 and 6 months after treatment
Heart rate measured by automatic blood pressure monitor in beats per minute (bpm).
Baseline, and at 3 and 6 months after treatment
Blood pressure
Time Frame: Baseline, and at 3 and 6 months after treatment
Blood pressure measured by automatic blood pressure monitor in Millimeters of mercury (mmHg) - report systolic and diastolic values separately.
Baseline, and at 3 and 6 months after treatment
Complete Blood Count
Time Frame: Baseline, and at 3 and 6 months after treatment
Complete Blood Count, including white blood cell count (×10⁹/L), red blood cell count (×10¹²/L), hemoglobin (g/L), and platelet count (×10⁹/L), will be assessed via blood draw.
Baseline, and at 3 and 6 months after treatment
Urinalysis
Time Frame: Baseline, and at 3 and 6 months after treatment
Urinalysis, performed on collected urine samples, includes measurements of protein (g/L), glucose (mmol/L), and red blood cells (/μL).
Baseline, and at 3 and 6 months after treatment
Liver and Renal Function Tests
Time Frame: Baseline, and at 3 and 6 months after treatment
Liver function parameters (ALT and AST, in U/L) and renal function parameters (Cr and BUN, in μmol/L and mmol/L, respectively) will be measured via blood draw.
Baseline, and at 3 and 6 months after treatment
Coagulation Profile
Time Frame: Baseline, and at 3 and 6 months after treatment
Blood samples will be collected to assess coagulation profile, including prothrombin time (PT, in seconds), activated partial thromboplastin time (APTT, in seconds), thrombin time (TT, in seconds), and fibrinogen (FIB, in g/L).
Baseline, and at 3 and 6 months after treatment
Cardiac function
Time Frame: Baseline, and at 3 and 6 months after treatment
Electrocardiogram (ECG) will be used to evaluate cardiac function, with the following parameters recorded: heart rate (bpm), PR interval (ms), QRS duration (ms), and QT interval (ms).
Baseline, and at 3 and 6 months after treatment

Collaborators and Investigators

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

Sponsor

Sponsor

The organization or person who initiates the study and who has authority and control over the study.
First Affiliated Hospital of Zhejiang University

Collaborators

Collaborators

An organization other than the sponsor that provides support for a clinical study. This support may include activities related to funding, design, implementation, data analysis, or reporting.
Zhejiang Provincial Tongde Hospital
The Fourth Affiliated Hospital of Zhejiang University School of Medicine

Investigators

Investigators

A researcher involved in a clinical study. Related terms include site principal investigator, site sub-investigator, study chair, study director, and study principal investigator.
  • Principal Investigator: Hongguang Cui, Zhejiang 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 (Estimated)

Study Start

The actual date on which the first participant was enrolled in a clinical study. The "anticipated" study start date is the date that the researchers think will be the study start date.
June 1, 2026

Primary Completion (Estimated)

Primary Completion

The date on which the last participant in a clinical study was examined or received an intervention to collect final data for the primary outcome measure. Whether the clinical study ended according to the protocol or was terminated does not affect this date. For clinical studies with more than one primary outcome measure with different completion dates, this term refers to the date on which data collection is completed for all the primary outcome measures. The "anticipated" primary completion date is the date that the researchers think will be the primary completion date for the study.
December 1, 2028

Study Completion (Estimated)

Study Completion

The date on which the last participant in a clinical study was examined or received an intervention/treatment to collect final data for the primary outcome measures, secondary outcome measures, and adverse events (that is, the last participant's last visit). The "anticipated" study completion date is the date that the researchers think will be the study completion date.
December 31, 2028

Study Registration Dates

First Submitted

First Submitted

The date on which the study sponsor or investigator first submitted a study record to ClinicalTrials.gov. There is typically a delay of a few days between the first submitted date and the record's availability on ClinicalTrials.gov (the first posted date).
June 2, 2026

First Submitted That Met QC Criteria

First Submitted That Met QC Criteria

The date on which the study sponsor or investigator first submits a study record that is consistent with National Library of Medicine (NLM) quality control (QC) review criteria. The sponsor or investigator may need to revise and submit a study record one or more times before NLM's QC review criteria are met. It is the responsibility of the sponsor or investigator to ensure that the study record is consistent with the NLM QC review criteria.
July 17, 2026

First Posted (Actual)

First Posted

The date on which the study record was first available on ClinicalTrials.gov after National Library of Medicine (NLM) quality control (QC) review has concluded. There is typically a delay of a few days between the date the study sponsor or investigator submitted the study record and the first posted date.
July 22, 2026

Study Record Updates

Last Update Posted (Actual)

Last Update Posted

The most recent date on which changes to a study record were made available on ClinicalTrials.gov. There may be a delay between when the changes were submitted to ClinicalTrials.gov by the study's sponsor or investigator (the last update submitted date) and the last update posted date.
July 22, 2026

Last Update Submitted That Met QC Criteria

Last Update Submitted That Met QC Criteria

The most recent date on which the study sponsor or investigator submitted changes to a study record that are consistent with National Library of Medicine (NLM) quality control (QC) review criteria. It is the responsibility of the sponsor or investigator to ensure that the study record is consistent with the NLM QC review criteria.
July 17, 2026

Last Verified

Last Verified

The most recent date on which the study sponsor or investigator confirmed the information about a clinical study on ClinicalTrials.gov as accurate and current. If a study with a recruitment status of recruiting; not yet recruiting; or active, not recruiting has not been confirmed within the past 2 years, the study's recruitment status is shown as unknown.
May 1, 2026

More Information

Terms related to this study

Keywords

Additional Relevant MeSH Terms

Other Study ID Numbers

Other Study ID Numbers

Identifiers or ID numbers other than the NCT number that are assigned to a clinical study by the study's sponsor, funders, or others. These numbers may include unique identifiers from other trial registries and National Institutes of Health grant numbers.
  • IIT20260045C-R1

Plan for Individual participant data (IPD)

Plan to Share Individual Participant Data (IPD)?

NO

IPD Plan Description

Individual participant data (IPD) will not be shared with external researchers. The raw clinical data collected in this trial only serves for internal statistical analysis and scientific research of the research team, and there is no relevant data sharing plan at present.

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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