70
Participants
Start Date
June 1, 2021
Primary Completion Date
October 1, 2022
Study Completion Date
December 1, 2022
Advanced ultrasound measurements (Duplex ultrasound (DUS) and Vector flow imaging (VFI)
PPG is a non-invasive method used to evaluates the severity venous reflux by measuring the venous refiling time (VRT).The principal of PPG works by using a small light source and a photoelectric cell attached to the skin in the medial supramalleolar area of the leg (the distal lower medial area of the leg).
Clinical interventions and procedures
"First trimester (0-13 weeks):~* Consent~* Clinical data collection~* Blood samples (genomic+ hormonal)~* Duplex ultrasound~* Vector flow imaging (advanced ultrasound software)~* Truncated cone tool (measuring leg circumference using a tape measure)~* PPG~* AVVQ (Aberdeen varicose veins questionaire)~Second trimester (14-26 weeks):~* Clinical data collection~* Blood sample (hormonal only)~* DUS~* VFI~* Truncated cone tool~* PPG~* AVVQ~Third trimester (27-40 weeks):~Same as second trimester~Three months after giving birth:~Same as second trimester"
Imperial College London, London
Imperial College London
OTHER