Blue Dye's hidden effect on blood pressure during breast surgery revealed
NCT ID NCT07040540
First seen Jun 27, 2026 · Last updated Jun 27, 2026
Summary
This study looked at 220 women having breast surgery to see if a blue dye called methylene blue, used to find lymph nodes, changes blood pressure or heart rate during anesthesia. The researchers compared women who got the dye with those who did not. The goal was to learn if the dye helps keep blood pressure stable or causes drops that need extra medicine.
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Study facts
What this study's own registry entry says, in plain language.
- Participants
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220 people
The number who actually took part.
- Started
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Jul 2025
- Finished
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Jan 2026
- Lead sponsor
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Other sponsor
The registry's catch-all category, for sponsors it does not file as a company, a government agency, or a research network.
Who can take part
This study's own entry requirements. Only the study team can say for certain whether you qualify.
Who is studied
The study population consists of adult female patients, aged 18 to 70 years, who are scheduled for elective breast surgery at Dr. Abdurrahman Yurtaslan Ankara Oncology Training and Research Hospital. This population includes two distinct cohorts: (1) patients undergoing procedures that require sentinel lymph node mapping using intradermal methylene blue injection (such as breast-conserving surgery or mastectomy with SLNB), and (2) patients undergoing breast surgery (such as mastectomy or lumpectomy) where no methylene blue or other mapping dyes are administered, serving as the control group. All participants are selected from patients receiving general anesthesia and managed according to standard clinical protocols.
- Ages
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18 to 70 years
- Sex
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Female participants only
- Healthy volunteers
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Accepted
You do not need to have the condition being studied to take part.
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Copied word for word from the study's registry entry, so the wording is the study team's rather than ours.
Inclusion Criteria: Female patients aged 18 to 70 years. Scheduled for elective breast surgery (mastectomy, lumpectomy, or sentinel lymph node biopsy). For the study group: Planned use of intradermal methylene blue. For the control group: Breast surgery without the use of methylene blue. Provided written informed consent. Exclusion Criteria: Known allergy or hypersensitivity to methylene blue or other dyes Presence of severe cardiovascular disease Pregnancy Incomplete or missing data records
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Conditions
The condition(s) this trial relates to.
As listed by the trial registrant
The condition terms exactly as the trial's registrant entered them.
Contacts and locations
Locations
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Dr. Abdurrahman Yurtaslan Ankara Oncology Education and Research Hospital Clinic of Anesthesiology and Rea
Ankara, Yenimahalle, 06200, Turkey (Türkiye)
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Other studies related to the condition(s) this trial covers.
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