An observational study in Varicose Veins Leg, sponsored by The Whiteley Clinic. Recruiting at 1 site in United Kingdom. Open to participants aged 18 Years and older. Per ClinicalTrials.gov, last updated 2026-01-12.
Sponsored by The Whiteley Clinic · Observational
The goal of this observational study is to identify the optimal time of Infrared imaging of varicose veins when patients move from a lying to a standing position.
The primary purpose is to enable us to improve our imaging of varicose veins in patients presenting with primary or recurrent leg varicose veins.
The main questions it aims to answer are:
Outcome measure 1- How long after standing up from lying supine do leg varicose veins show up best on infrared imaging? Outcome measure 2 - Is there any difference in this timing between varicose veins arising from different sources in the leg?
Patients will be asked to stand, and sequential infrared images will be taken every 5 seconds for 3 minutes.
Patients who are having a Duplex ultrasound of their lower-limb veins for the assessment of varicose veins (primary or recurrent) and who have consented to participation in the study will be taken from the scanning room to the research room (within 20 meters).
The patient will be asked for their height and weight to enable BMI to be calculated. The patient will then lie down horizontally for 5 minutes on a bed in the research room. At the end of the 5 minutes, an IR image will be taken of the participant's lower limbs to ensure clearance of varicose veins.
The patient will then be asked to stand in front of an IR camera on a mat with marked positions for their feet on the floor in a position ensuring maximum surface area coverage of lower-limb varicose veins by the camera. The patient will stand still for a period of 3 minutes whilst the IR camera (HIKMICRO M10) takes a series of JPEG photos every 5 seconds. The position of the camera will be adjusted so that the top of the image is at the level of the hip, and the bottom of the image at the sole of the foot. Hence, the image size will be maximised to include the whole leg.
The first image will be taken immediately the patient stands and is in position, minimising any lag and aiming to be within 5 seconds of starting to move from the supine position. After 3 minutes, the patient will be able to sit down and then return to the consultation room.
226 studies on the registry are indexed under Varicose Veins; 30 are open to participants now.
This study's planned enrollment of 20 is below the median of 159 across 62 observational studies indexed under Varicose Veins.
Browse Varicose Veins studies →The Whiteley Clinic is the lead sponsor of 15 studies on the registry; 3 are open to participants now.
Counted across the registry records on this site, refreshed daily.
All patient attending our vein clinc for assessement of their varicose veins
Go through the criteria one by one — yes, no or not sure — and take the list to your doctor or the study team. Kept in this browser only.
Exclusion Criteria:
Primary or recurrent varicose veins
Diagnostic Test: Infrared imaging
Patients will only have infrared images taken of their legs
Time of optimal Infrared imaging of leg varicose veins after standing from lying
Sequential infrared images will show us at what time point the optimal infrared images have been obtained.
Time frame: The whole process for the patient will be a maximum of 20 minutes. The analysis of all of the images will be completed within 1 month of the end of the data collection.
Variation of optimal infrared image timing due to the source of venous reflux
Using the infrared images and comparing them with the duplex ultrasound scans that the patient is having as part of their normal medical assessment, we will subdivide the images by the underlying source of the varicose veins and venous reflux. We will assess whether there is a different time to optimal Infrared imaging with different patterns of venous reflux, predominantly great or small saphenous reflux.
Time frame: The patient data collection will be within 20 minutes, and the analysis within 1 month.
Plan to share: No — IPD is not relevant to the outcomes
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