[{"data":1,"prerenderedAt":-1},["ShallowReactive",2],{"health-studies-list:{\"conditionNormalized\":\"air-travel\",\"overallStatus\":[\"RECRUITING\",\"AVAILABLE\",\"NOT_YET_RECRUITING\"],\"orderBy\":\"LastUpdateSubmitDate:desc\",\"size\":25,\"offset\":0}":3,"health-study-condition:air-travel":27},{"pageToken":4,"total":5,"offset":6,"count":5,"results":7},null,4,0,[8,48,68,85],{"id":9,"slug":10,"hasResults":11,"nctId":12,"briefTitle":13,"officialTitle":13,"acronym":4,"eligibilityCriteria":14,"healthyVolunteers":11,"sex":15,"minAge":16,"maxAge":17,"enrollmentInfo":18,"targetDuration":4,"studyType":21,"phases":22,"briefSummary":24,"conditions":25,"keywords":28,"overallStatus":35,"whyStopped":4,"lastUpdateSubmitDate":36,"lastUpdatePostDateStruct":37,"startDateStruct":40,"completionDateStruct":42,"leadSponsor":44,"locationsCount":47},"100655303","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-100655303",false,"NCT07808931","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","Inclusion Criteria:\n\n* Age 18 to 65 years.\n* Commercial itinerary to Bogota with at least 4 hours of total airborne time.\n* Prebooked premium business\u002Ffirst-class or economy-class cabin documented before randomization.\n* No medical requirement for or contraindication to graduated compression stockings.\n* Ability to complete standardized ultrasound before flight and through 48 hours after arrival before surgery.\n* Written informed consent.\n\nExclusion Criteria:\n\n* Current deep venous thrombosis, therapeutic anticoagulation, or severe peripheral arterial disease.\n* Pregnancy.\n* Lower-extremity skin, neurologic, or anatomic condition preventing safe stocking use or ultrasound.\n* Cabin upgrade or downgrade after randomization that changes the prespecified stratum.\n* Surgery or major intravenous fluid therapy before the 48-hour examination.\n* Inability to follow the randomized stocking assignment.","ALL","18 Years","65 Years",{"count":19,"type":20},200,"ESTIMATED","INTERVENTIONAL",[23],"NA","This four-group prospective study will enroll travelers who have independently booked economy or premium business\u002Ffirst-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.",[26,27],"Physiologic Venous Dilation","Air Travel",[29,30,31,32,33,34],"Medical Tourism","Duplex Ultrasound","Popliteal Vein","Factorial Design","Compression Stockings","Cabin Class","RECRUITING","2026-09-07",{"date":38,"type":39},"2026-09-09","ACTUAL",{"date":41,"type":39},"2024-01-12",{"date":43,"type":20},"2026-12-01",{"name":45,"class":46},"Research Inc","INDUSTRY",1,{"id":49,"slug":50,"hasResults":11,"nctId":51,"briefTitle":52,"officialTitle":52,"acronym":4,"eligibilityCriteria":53,"healthyVolunteers":11,"sex":15,"minAge":16,"maxAge":17,"enrollmentInfo":54,"targetDuration":55,"studyType":56,"phases":4,"briefSummary":57,"conditions":58,"keywords":59,"overallStatus":35,"whyStopped":4,"lastUpdateSubmitDate":63,"lastUpdatePostDateStruct":64,"startDateStruct":65,"completionDateStruct":66,"leadSponsor":67,"locationsCount":47},"100655306","prospective-comparative-cohort-study-of-premium-versus-economy-cabin-travel-and-popliteal-vein-diameter-after-long-haul-flight-after-an-aesthetic-surgery-100655306","NCT07810179","Prospective Comparative Cohort Study of Premium Versus Economy Cabin Travel and Popliteal Vein Diameter After Long-Haul Flight After an Aesthetic Surgery","Inclusion Criteria:\n\n* Age 18 to 65 years.\n* Commercial flight to Bogota with at least 4 hours of total airborne time.\n* Prebooked premium business\u002Ffirst-class or economy-class seat documented before enrollment.\n* Standardized preflight ultrasound within 24 hours before departure.\n* Arrival, 24-hour, and 48-hour ultrasound completed before surgery.\n* Written informed consent.\n\nExclusion Criteria:\n\n* Current or prior unprovoked deep venous thrombosis requiring therapeutic anticoagulation.\n* Therapeutic anticoagulation during the study window.\n* Current pregnancy.\n* Lower-extremity condition preventing standardized bilateral popliteal ultrasound.\n* Surgery, prolonged immobilization, or major intravenous fluid administration before completion of the 48-hour scan.\n* Use of cabin upgrade after baseline or inability to verify the actual cabin flown.",{"count":19,"type":20},"1 Month","OBSERVATIONAL","This prospective cohort study will compare popliteal vein diameter changes in international travelers who independently fly to Bogota in premium business\u002Ffirst class or economy class. Standardized bilateral ultrasound will be performed before flight, within 2 hours after arrival, and at 24 and 48 hours. The primary outcome is the adjusted between-group difference in change from preflight diameter to arrival. Travel behavior and venous-risk confounders will be measured prospectively.",[26,27],[34,60,61,62,31,30,29],"Business Class","First Class","Economy Class","2026-09-02",{"date":38,"type":39},{"date":41,"type":39},{"date":43,"type":20},{"name":45,"class":46},{"id":69,"slug":70,"hasResults":11,"nctId":71,"briefTitle":72,"officialTitle":72,"acronym":4,"eligibilityCriteria":73,"healthyVolunteers":11,"sex":15,"minAge":16,"maxAge":17,"enrollmentInfo":74,"targetDuration":4,"studyType":21,"phases":76,"briefSummary":77,"conditions":78,"keywords":79,"overallStatus":35,"whyStopped":4,"lastUpdateSubmitDate":63,"lastUpdatePostDateStruct":80,"startDateStruct":81,"completionDateStruct":83,"leadSponsor":84,"locationsCount":47},"100655270","randomized-assessor-masked-trial-of-moderate-graduated-compression-stockings-for-popliteal-vein-dilation-during-long-haul-economy-class-air-travel-after-aesthetic-surgery-100655270","NCT07810192","Randomized Assessor-Masked Trial of Moderate Graduated Compression Stockings for Popliteal Vein Dilation During Long-Haul Economy-Class Air Travel After Aesthetic Surgery","Inclusion Criteria:\n\n* Age 18 to 65 years.\n* Economy-class commercial itinerary to Bogota with at least 4 hours of total airborne time.\n* No clinical indication that mandates or prohibits compression stockings.\n* Ability to obtain the assigned stocking before boarding and wear it as instructed.\n* Standardized preflight and postarrival ultrasounds completed before surgery.\n* Written informed consent.\n\nExclusion Criteria:\n\n* Current deep venous thrombosis, therapeutic anticoagulation, or severe peripheral arterial disease.\n* Significant lower-limb skin disease, ulceration, neuropathy, or deformity preventing safe stocking use.\n* Pregnancy.\n* Planned use of another compression device during the flight.\n* Surgery or major intravenous fluid therapy before completion of the 48-hour examination.\n* Inability to complete preflight ultrasound or follow assigned treatment.",{"count":75,"type":20},160,[23],"This randomized assessor-masked trial will evaluate whether knee-high moderate graduated compression stockings reduce popliteal vein dilation during long-haul economy-class air travel to Bogota. Participants will be assigned to stockings or no stockings and will undergo bilateral ultrasound before flight, within 2 hours after arrival, and at 24 and 48 hours. The primary outcome is the between-group difference in change in mean bilateral popliteal vein diameter from preflight baseline to arrival.",[26,27],[33,27,31,30,29],{"date":38,"type":39},{"date":82,"type":39},"2024-01-01",{"date":43,"type":20},{"name":45,"class":46},{"id":86,"slug":87,"hasResults":11,"nctId":88,"briefTitle":89,"officialTitle":89,"acronym":4,"eligibilityCriteria":90,"healthyVolunteers":11,"sex":15,"minAge":16,"maxAge":17,"enrollmentInfo":91,"targetDuration":93,"studyType":56,"phases":4,"briefSummary":94,"conditions":95,"keywords":96,"overallStatus":35,"whyStopped":4,"lastUpdateSubmitDate":63,"lastUpdatePostDateStruct":99,"startDateStruct":101,"completionDateStruct":102,"leadSponsor":103,"locationsCount":47},"100655014","prospective-repeated-measures-study-of-popliteal-vein-diameter-during-the-first-48-hours-after-commercial-air-travel-to-bogota-for-a-plastic-surgery-intervention-100655014","NCT07808411","Prospective Repeated-Measures Study of Popliteal Vein Diameter During the First 48 Hours After Commercial Air Travel to Bogota for a Plastic Surgery Intervention","Inclusion Criteria:\n\n* Age 18 to 65 years.\n* International commercial flight to Bogota with total airborne time of at least 4 hours.\n* Preflight baseline ultrasound obtained within 24 hours before departure using the standardized protocol.\n* Arrival ultrasound completed within 2 hours after reaching the study site and before surgery or intravenous fluid therapy.\n* Availability for 24-hour and 48-hour examinations.\n* Written informed consent.\n\nExclusion Criteria:\n\n* Known current deep venous thrombosis or pulmonary embolism.\n* Therapeutic anticoagulation at enrollment.\n* Major lower-extremity venous surgery, active leg infection, or condition preventing popliteal ultrasound.\n* Surgery, prolonged immobilization, or substantial intravenous fluid administration before completion of the 48-hour measurement.\n* Pregnancy.\n* Nondiagnostic baseline examination or inability to reproduce the landmark.",{"count":92,"type":20},100,"1 Week","This prospective repeated-measures study will evaluate how long popliteal vein dilation persists after international commercial air travel to Bogota. Adult medical travelers will undergo standardized bilateral popliteal vein ultrasound within 24 hours before departure, within 2 hours after arrival, and at 24 and 48 hours after arrival, all before surgery. The primary outcome is change in mean bilateral popliteal vein diameter over time.",[26,27],[31,27,29,97,30,98],"Venous Diameter","Long-Haul Flight",{"date":100,"type":39},"2026-09-08",{"date":41,"type":39},{"date":43,"type":20},{"name":45,"class":46}]