 A balloon was then inserted across the GE junction, 15 mm to 18 mm, and inflated to 3, 4.7, and 7 ATM, and left inflated at 18 mm for 45 seconds. 
A balloon was then inserted across the GE junction , 15 mm to 18 mm , and inflated to 3 , 4.7 , and 7 ATM , and left inflated at 18 mm for 45 seconds .