Popliteal Vein Size After Long-Distance Air Travel Before Plastic Surgery

Is this trial a fit for you?

A plain-English reading of the study's rules. Only the study team can confirm whether you qualify.

What this trial studies

This prospective observational study will measure how the popliteal vein diameter changes over the first 48 hours after an international flight to Bogota. Adults traveling for medical reasons will have standardized bilateral popliteal vein ultrasounds 24 hours before departure, within 2 hours after arrival, and at 24 and 48 hours post-arrival, all before any surgery or IV fluids. A fixed resting protocol and triplicate measurements will be used, and factors like flight duration, seating, movement, and fluid intake will be recorded. Mixed-effects analysis will estimate the trajectory of diameter and surface area, including the proportion returning to within 10% of baseline by 48 hours.

Why it matters

Who can join: the full rules

Inclusion Criteria:

* Age 18 to 65 years.
* International commercial flight to Bogota with total airborne time of at least 4 hours.
* Preflight baseline ultrasound obtained within 24 hours before departure using the standardized protocol.
* Arrival ultrasound completed within 2 hours after reaching the study site and before surgery or intravenous fluid therapy.
* Availability for 24-hour and 48-hour examinations.
* Written informed consent.

Exclusion Criteria:

* Known current deep venous thrombosis or pulmonary embolism.
* Therapeutic anticoagulation at enrollment.
* Major lower-extremity venous surgery, active leg infection, or condition preventing popliteal ultrasound.
* Surgery, prolonged immobilization, or substantial intravenous fluid administration before completion of the 48-hour measurement.
* Pregnancy.
* Nondiagnostic baseline examination or inability to reproduce the landmark.

Where it's running

• Clinica INO
  Bogotá, Colombia Recruiting

Study contacts

• Principal investigator: Hugo Aguilar, MD, plastic surgery
• Study coordinator: Hugo Aguilar, MD, Plastic surgeon
• Email: havplasticacademy@gmail.com
• Phone: +57 301 6918526

Similar studies

Other studies for the same condition or treatment. Recruiting studies are listed first.

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How to take part

1. Review the eligibility criteria above with your treating physician.
2. Check the official listing on ClinicalTrials.gov for the latest contact details and recruitment status.
3. Contact the study coordinator or principal investigator to ask for pre-screening. Pre-screening is free and never obligates you to enroll.