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Prospective Stratified Randomized Four-Group Study of Cabin Class and Graduated Compression Stockings on Popliteal Vein Dilation After Long-Haul Air Travel After Aesthetic Surgery

7. september 2026 opdateret af: Research Inc
This four-group prospective study will enroll travelers who have independently booked economy or premium business/first-class flights to Bogota. Within each cabin stratum, participants will be randomized to moderate graduated compression stockings or no stockings. Bilateral popliteal vein ultrasound will be performed before flight, within 2 hours after arrival, and at 24 and 48 hours. The primary outcome is the interaction between cabin class and compression assignment for change in mean bilateral popliteal vein diameter.

Studieoversigt

Status

Rekruttering

Betingelser

Intervention / Behandling

Detaljeret beskrivelse

Participants will enter the study according to their prebooked cabin class and then be randomized within that stratum to wear properly fitted knee-high graduated compression stockings or no compression during the flight. The design creates four groups. Standardized bilateral ultrasound will quantify venous diameter and cross-sectional area before departure and through 48 hours after arrival, before surgery. Mixed-effects models will estimate the randomized stocking effect, the adjusted cabin-class association, and their interaction. The protocol will record seat characteristics, ambulation, hydration, adherence, symptoms, and safety events.

Undersøgelsestype

Interventionel

Tilmelding (Anslået)

200

Fase

  • Ikke anvendelig

Kontakter og lokationer

Dette afsnit indeholder kontaktoplysninger for dem, der udfører undersøgelsen, og oplysninger om, hvor denne undersøgelse udføres.

Studiekontakt

Studiesteder

Deltagelseskriterier

Forskere leder efter personer, der passer til en bestemt beskrivelse, kaldet berettigelseskriterier. Nogle eksempler på disse kriterier er en persons generelle helbredstilstand eller tidligere behandlinger.

Berettigelseskriterier

Aldre berettiget til at studere

  • Voksen
  • Ældre voksen

Tager imod sunde frivillige

Ingen

Beskrivelse

Inclusion Criteria:

  • Age 18 to 65 years.
  • Commercial itinerary to Bogota with at least 4 hours of total airborne time.
  • Prebooked premium business/first-class or economy-class cabin documented before randomization.
  • No medical requirement for or contraindication to graduated compression stockings.
  • Ability to complete standardized ultrasound before flight and through 48 hours after arrival before surgery.
  • Written informed consent.

Exclusion Criteria:

  • Current deep venous thrombosis, therapeutic anticoagulation, or severe peripheral arterial disease.
  • Pregnancy.
  • Lower-extremity skin, neurologic, or anatomic condition preventing safe stocking use or ultrasound.
  • Cabin upgrade or downgrade after randomization that changes the prespecified stratum.
  • Surgery or major intravenous fluid therapy before the 48-hour examination.
  • Inability to follow the randomized stocking assignment.

Studieplan

Dette afsnit indeholder detaljer om studieplanen, herunder hvordan undersøgelsen er designet, og hvad undersøgelsen måler.

Hvordan er undersøgelsen tilrettelagt?

Design detaljer

  • Primært formål: Forebyggelse
  • Tildeling: Ikke-randomiseret
  • Interventionel model: Parallel tildeling
  • Maskning: Enkelt

Våben og indgreb

Deltagergruppe / Arm
Intervention / Behandling
Eksperimentel: Economy Cabin Plus Compression
Participants with a prebooked economy itinerary randomized to knee-high moderate graduated compression stockings.
PROPOSED pressure class: 20-30 mmHg at the ankle, properly fitted and worn from approximately 1 hour before boarding through the arrival ultrasound. Product and pressure class require confirmation. Linked arm/group(s): Economy Cabin Plus Compression, Premium Cabin Plus Compression.
Prebooked and completed economy-cabin travel; seat characteristics and behavior are measured but not assigned. Linked arm/group(s): Economy Cabin Plus Compression, Economy Cabin Without Compression.
Triplicate bilateral diameter and cross-sectional-area measurements before flight and at arrival, 24 hours, and 48 hours by an assessor masked to stocking allocation. Linked arm/group(s): Economy Cabin Plus Compression, Economy Cabin Without Compression, Premium Cabin Plus Compression, Premium Cabin Without Compression.
Aktiv komparator: Economy Cabin Without Compression
Participants with a prebooked economy itinerary randomized to no compression stockings.
Prebooked and completed economy-cabin travel; seat characteristics and behavior are measured but not assigned. Linked arm/group(s): Economy Cabin Plus Compression, Economy Cabin Without Compression.
Triplicate bilateral diameter and cross-sectional-area measurements before flight and at arrival, 24 hours, and 48 hours by an assessor masked to stocking allocation. Linked arm/group(s): Economy Cabin Plus Compression, Economy Cabin Without Compression, Premium Cabin Plus Compression, Premium Cabin Without Compression.
Eksperimentel: Premium Cabin Plus Compression
Participants with a prebooked business/first-class itinerary randomized to knee-high moderate graduated compression stockings.
PROPOSED pressure class: 20-30 mmHg at the ankle, properly fitted and worn from approximately 1 hour before boarding through the arrival ultrasound. Product and pressure class require confirmation. Linked arm/group(s): Economy Cabin Plus Compression, Premium Cabin Plus Compression.
Triplicate bilateral diameter and cross-sectional-area measurements before flight and at arrival, 24 hours, and 48 hours by an assessor masked to stocking allocation. Linked arm/group(s): Economy Cabin Plus Compression, Economy Cabin Without Compression, Premium Cabin Plus Compression, Premium Cabin Without Compression.
Prebooked and completed business/first-class travel; seat characteristics and behavior are measured but not assigned. Linked arm/group(s): Premium Cabin Plus Compression, Premium Cabin Without Compression.
Aktiv komparator: Premium Cabin Without Compression
Participants with a prebooked business/first-class itinerary randomized to no compression stockings.
Triplicate bilateral diameter and cross-sectional-area measurements before flight and at arrival, 24 hours, and 48 hours by an assessor masked to stocking allocation. Linked arm/group(s): Economy Cabin Plus Compression, Economy Cabin Without Compression, Premium Cabin Plus Compression, Premium Cabin Without Compression.
Prebooked and completed business/first-class travel; seat characteristics and behavior are measured but not assigned. Linked arm/group(s): Premium Cabin Plus Compression, Premium Cabin Without Compression.

Hvad måler undersøgelsen?

Primære resultatmål

Resultatmål
Foranstaltningsbeskrivelse
Tidsramme
Cabin-Class-by-Compression Interaction in Change in Popliteal Vein Diameter
Tidsramme: Within 24 hours before departure and within 2 hours after arrival at the study site. 3 days
Interaction term between prebooked cabin stratum and randomized stocking assignment for the change in participant-level mean bilateral popliteal vein diameter from preflight baseline to arrival.
Within 24 hours before departure and within 2 hours after arrival at the study site. 3 days

Sekundære resultatmål

Resultatmål
Foranstaltningsbeskrivelse
Tidsramme
Randomized Compression Stocking Effect on Arrival-Related Diameter Change
Tidsramme: Within 24 hours before departure and within 2 hours after arrival. 3 days
Adjusted mean difference between stocking and no-stocking assignments overall and separately within each cabin stratum.
Within 24 hours before departure and within 2 hours after arrival. 3 days
Adjusted Cabin-Class Association With Arrival-Related Diameter Change
Tidsramme: Within 24 hours before departure and within 2 hours after arrival. 3 days
Adjusted mean difference between premium and economy cabin groups overall and separately by stocking assignment. This contrast is observational because cabin class is not randomized.
Within 24 hours before departure and within 2 hours after arrival. 3 days
Four-Group Popliteal Vein Diameter Trajectory
Tidsramme: Within 24 hours before departure; within 2 hours after arrival; 24 +/- 2 hours; and 48 +/- 2 hours after arrival. 3 days
Estimated mean bilateral diameter and change from baseline in each of the four groups across postarrival time points.
Within 24 hours before departure; within 2 hours after arrival; 24 +/- 2 hours; and 48 +/- 2 hours after arrival. 3 days

Samarbejdspartnere og efterforskere

Det er her, du vil finde personer og organisationer, der er involveret i denne undersøgelse.

Sponsor

Efterforskere

  • Ledende efterforsker: Hugo Aguilar

Datoer for undersøgelser

Disse datoer sporer fremskridtene for indsendelser af undersøgelsesrekord og resumeresultater til ClinicalTrials.gov. Studieregistreringer og rapporterede resultater gennemgås af National Library of Medicine (NLM) for at sikre, at de opfylder specifikke kvalitetskontrolstandarder, før de offentliggøres på den offentlige hjemmeside.

Studer store datoer

Studiestart (Faktiske)

12. januar 2024

Primær færdiggørelse (Faktiske)

1. september 2026

Studieafslutning (Anslået)

1. december 2026

Datoer for studieregistrering

Først indsendt

2. september 2026

Først indsendt, der opfyldte QC-kriterier

7. september 2026

Først opslået (Faktiske)

9. september 2026

Opdateringer af undersøgelsesjournaler

Sidste opdatering sendt (Faktiske)

9. september 2026

Sidste opdatering indsendt, der opfyldte kvalitetskontrolkriterier

7. september 2026

Sidst verificeret

1. september 2026

Mere information

Begreber relateret til denne undersøgelse

Andre undersøgelses-id-numre

  • 018

Plan for individuelle deltagerdata (IPD)

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INGEN

IPD-planbeskrivelse

not contempled in the patient informed concent

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