40
Participants
Start Date
January 31, 2012
Primary Completion Date
May 31, 2012
Study Completion Date
May 31, 2012
Valsava
The patients were randomized to 2 groups. The first group performed conventional Valsava 3 times before balloon assisted Valsava 3 times. The second group performed balloon assisted Valsava 3 times before conventional Valsava 3 times for venous reflux examination by duplex scan.
Mahidol University
OTHER