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Prospective Repeated-Measures Study of Popliteal Vein Diameter During the First 48 Hours After Commercial Air Travel to Bogota for a Plastic Surgery Intervention

2026年9月2日 更新者：Research Inc
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.

研究概览

地位

招聘中

条件

干预/治疗

详细说明

Eligible international travelers will complete a standardized preflight ultrasound and three postarrival examinations before surgery or intravenous fluid therapy. Each scan will be performed after a fixed resting period using the same popliteal landmark, minimal transducer pressure, and triplicate bilateral measurements. Flight duration, class, seat characteristics, movement, fluid intake, compression stocking use, and venous risk factors will be recorded. Mixed-effects analysis will estimate the postflight diameter and cross-sectional-area trajectory and the proportion returning to within 10% of baseline by 48 hours.

研究类型

观察性的

注册 (估计的)

100

联系人和位置

本节提供了进行研究的人员的详细联系信息，以及有关进行该研究的地点的信息。

学习联系方式

学习地点

参与标准

研究人员寻找符合特定描述的人，称为资格标准。这些标准的一些例子是一个人的一般健康状况或先前的治疗。

资格标准

适合学习的年龄

  • 成人
  • 年长者

接受健康志愿者

不

取样方法

非概率样本

研究人群

Adult international medical travelers completing a commercial flight of at least 4 hours to Bogota and undergoing all ultrasound measurements before surgery.

描述

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.

学习计划

本节提供研究计划的详细信息，包括研究的设计方式和研究的衡量标准。

研究是如何设计的？

设计细节

队列和干预

团体/队列
干预/治疗
Postflight Repeated-Measures Cohort
All participants undergo standardized preflight and postarrival bilateral popliteal vein ultrasound without assignment to a travel intervention.
其他：Commercial Air Travel Exposure
Participants complete a commercial flight of at least 4 hours to Bogota. Flight duration, connections, cabin class, seat characteristics, movement, fluid intake, alcohol, sedatives, and compression stocking use will be recorded. Linked arm/group(s): Postflight Repeated-Measures Cohort.
诊断测试：Standardized Bilateral Popliteal Vein Duplex Ultrasound
After at least 10 minutes of supine rest, the popliteal vein will be imaged at a fixed landmark with minimal probe pressure. Anteroposterior and transverse diameters, cross-sectional area, compressibility, and flow will be recorded in both legs, with three repeated measurements averaged. Linked arm/group(s): Postflight Repeated-Measures Cohort.

研究衡量的是什么？

主要结果指标

结果测量
措施说明
大体时间
Change in Mean Bilateral Popliteal Vein Diameter
大体时间：Within 24 hours before departure; within 2 hours after arrival at the study site; 24 +/- 2 hours after arrival; and 48 +/- 2 hours after arrival. 1 week
At each visit, the mean of three anteroposterior diameter measurements in each leg will be calculated, followed by the mean of both legs. Change from the participant's preflight value will be reported in millimeters and as percent change.
Within 24 hours before departure; within 2 hours after arrival at the study site; 24 +/- 2 hours after arrival; and 48 +/- 2 hours after arrival. 1 week

次要结果测量

结果测量
措施说明
大体时间
Return of Popliteal Vein Diameter to Baseline
大体时间：24 +/- 2 hours and 48 +/- 2 hours after arrival. 1 week
Proportion of participants whose mean bilateral diameter is within plus or minus 10% of their preflight value.
24 +/- 2 hours and 48 +/- 2 hours after arrival. 1 week
Incidental Venous Thrombosis or Abnormal Compressibility
大体时间：From preflight baseline through 48 hours after arrival. 1week
Number and proportion of participants with a new noncompressible venous segment or other finding requiring diagnostic clinical evaluation. This research protocol is not designed as a definitive thrombosis screening examination unless the final duplex protocol is expanded.
From preflight baseline through 48 hours after arrival. 1week

合作者和调查者

在这里您可以找到参与这项研究的人员和组织。

赞助

Research Inc

调查人员

  • 首席研究员：Hugo Aguilar, MD, plastic surgery

出版物和有用的链接

负责输入研究信息的人员自愿提供这些出版物。这些可能与研究有关。

一般刊物

研究记录日期

这些日期跟踪向 ClinicalTrials.gov 提交研究记录和摘要结果的进度。研究记录和报告的结果由国家医学图书馆 (NLM) 审查，以确保它们在发布到公共网站之前符合特定的质量控制标准。

研究主要日期

学习开始 (实际的)

2024年1月12日

初级完成 (实际的)

2026年9月1日

研究完成 (估计的)

2026年12月1日

研究注册日期

首次提交

2026年9月2日

首先提交符合 QC 标准的

2026年9月2日

首次发布 (实际的)

2026年9月8日

研究记录更新

最后更新发布 (实际的)

2026年9月8日

上次提交的符合 QC 标准的更新

2026年9月2日

最后验证

2026年9月1日

更多信息

与本研究相关的术语

关键字

其他研究编号

  • 015 (其他标识符：Nahrain Medical Research Collective (NMRC))

计划个人参与者数据 (IPD)

计划共享个人参与者数据 (IPD)？

不

IPD 计划说明

not contempled in the patient informed consent

药物和器械信息、研究文件

研究美国 FDA 监管的药品

不

研究美国 FDA 监管的设备产品

不

此信息直接从 clinicaltrials.gov 网站检索，没有任何更改。如果您有任何更改、删除或更新研究详细信息的请求，请联系 register@clinicaltrials.gov. clinicaltrials.gov 上实施更改，我们的网站上也会自动更新.

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