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Enrolling by invitationNCT06660680MBIUpdated Oct 28, 2024

The Effect of Methylene Blue Infiltrating Injection on Anal Pain After Milligan-Morgan Surgery: a Randomized Controlled Clinical Study

A Phase 3 interventional study of Methylene Blue in Mixed Hemorrhoids, sponsored by The Second Affiliated Hospital of Anhui University of Traditional Chinese Medicine. Enrolling by invitation at 1 site in China. Open to participants aged 18 Years to 75 Years. Per ClinicalTrials.gov, last updated 2024-10-28.

Sponsored by The Second Affiliated Hospital of Anhui University of Traditional Chinese Medicine · Phase 3, Interventional, and Treatment

From the registry’s dates

  • Primary completion was expected by Oct 2025, 1 year 1 month ago, but the record still lists the study as enrolling by invitation.
Phase
Phase 3
Study type
Interventional
Enrollment
60
Allocation
Randomized
Ages
18 Years to 75 Years
Sex
All
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Study summary

A variety of analgesic strategies are available following mixed hemorrhoids surgery, including pharmacological interventions (7), acupuncture, moxibustion, and electroacupuncture . Medications such as opioid analgesics and non-steroidal anti-inflammatory drugs (NSAIDs) are commonly used but can be associated with side effects including nausea, vomiting, and gastrointestinal bleeding, with long-term use potentially leading to addiction (8). Complementary therapies require skilled administration and regular treatment sessions.

Methylene blue (MB), a cationic thiazine dye extensively utilized as a biological stain and chemical indicator, has been increasingly recognized for its potential analgesic properties (9). In the present study, methylene blue infiltrating injection (MBI) was administered to treat anal pain resulting from Milligan-Morgan surgery, with the aim of assessing its analgesic efficacy and safety profile.

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Conditions studied

  • Mixed Hemorrhoids

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Keywords

  • Milligan-Morgan surgery
03

In context

Hemorrhoids

238 studies on the registry are indexed under Hemorrhoids; 73 are open to participants now.

This study's planned enrollment of 60 is below the median of 100 across 183 interventional studies indexed under Hemorrhoids.

Browse Hemorrhoids studies →

Lead sponsor

The Second Affiliated Hospital of Anhui University of Traditional Chinese Medicine is the lead sponsor of 7 studies on the registry; 5 are open to participants now.

Counted across the registry records on this site, refreshed daily.

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Who can participate

Ages eligible
18 Years to 75 Years
Sexes eligible
All
Accepts healthy volunteers
No

Eligibility criteria

Inclusion Criteria:①Alignment with the diagnostic criteria for mixed hemorrhoids as outlined in the "American Society of Colon and Rectal Surgeons Clinical Practice Guidelines for the Management of Hemorrhoids" ; ②Provision of following a thorough comprehension of the study's aims; ③An age bracket of 18 to 75 years; ④Satisfaction of surgical indications.

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Exclusion Criteria:①Presence of anal fistula, anal fissure, perianal abscess, enteritis, or other intestinal pathologies; ②Patients with known allergies; ③Impaired liver or kidney function; ④Pregnancy or lactation.

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Terms in these criteria, in plain language(1)

Underlined terms in the criteria open these too. Explained by clinicaltrials.gg, not part of the registry record. The study team decides who can take part.

Informed consent

Before you join, the study team explains what taking part involves — its purpose, what happens, the risks and possible benefits — and answers your questions, so you can decide freely. Consent is usually recorded on a form (the informed consent form, ICF) signed by you or, where the law allows, by someone legally authorised to decide for you.

You can keep asking questions during the study, you are told of new information that matters, and you can choose to leave at any time.

05

Study design

Phase
Phase 3
Primary purpose
Treatment
Allocation
Randomized
Intervention model
Parallel assignment
Masking
None (open label)
Enrollment
60 participants (estimated)

Study arms

  • Experimental
    Study Group

    received MBI treatment to their surgical incisions upon completion of surgery

    Drug: Methylene Blue

  • No intervention
    Control group

    administered lornoxicam on an as-needed basis for analgesia.

Interventions

  • Received MBI treatment to their surgical incisions upon completion of surgery

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What researchers measure

Primary outcomes

  1. Pain

    Visual Analog Scale (VAS) scores

    Time frame: pain scores at 6, 24, 48, and 72 hours postoperatively

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Study locations

1 site
  • Second hospital affiliated Anhui University of Chinese Medicine
    Hefei, Anhui 230000, China
08

References and documents

Publications

  • Anorectal Branch of Chinese Medical Doctor A, Colorectal Surgery Group SSoCMA.

Individual participant data

Plan to share: No

09

Timeline

Tracking since Sep 25, 2026
ElapsedEstimatedEstimated, not yet reached

Started Oct 2024 (actual). Primary completion is estimated for Oct 2025, 11 months after the start.

How these figures are worked out, and which studies are left out of them.

Registered
Oct 25, 2024
First posted
Oct 28, 2024
StartActual
Oct 25, 2024
Primary completionEst.
Oct 1, 2025
CompletionEst.
Oct 1, 2025
Last update
Oct 28, 2024
What these dates mean
Start.
When the first participant enrolled; while estimated, when the study expects to open to recruitment.
Primary completion.
When the last participant was examined or treated to collect data for the study's main question, its primary outcome. A study that stopped early gives the date its data collection stopped.
Completion.
When the last participant's last visit took place, for every outcome, secondary ones and side effects included: the end of the study. Often later than primary completion, sometimes the same day.
Actual and Est.
Actual means the registry says the date has happened. Est. (estimated) is a date the sponsor plans or expects. It can still move, and the sponsor is expected to change it to actual once it has passed.
No changes since tracking began. The registry record was last updated on Oct 28, 2024, before this site started recording changes on Sep 25, 2026. Its history is on ClinicalTrials.gov ↗
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Registry details

Key details

Study ID
NCT06660680
Lead sponsor
The Second Affiliated Hospital of Anhui University of Traditional Chinese Medicine
Responsible party
Heng Deng (the second Hospital of Chinese Medicine, The Second Affiliated Hospital of Anhui University of Traditional Chinese Medicine) — Principal investigator
First posted
Oct 28, 2024
Start date
Oct 25, 2024
Primary completion
Oct 1, 2025 (estimated)
Completion
Oct 1, 2025 (estimated)
Last update
Oct 28, 2024

Oversight

Data monitoring committee
No
FDA-regulated drug
No
FDA-regulated device
No
View the source record on ClinicalTrials.gov ↗

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Discussion

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Studies of the drug tested here: Methylene Blue

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