▁or ▁another ▁method ) ▁to ▁the ▁mus cle ▁wall ▁in ▁and ▁around ▁the ▁dia ph rag m . ▁ ▁Ad just able ▁g astr ic ▁bands ▁hold ▁between ▁ 4 ▁and ▁ 1 2 ▁cc ▁of ▁sal ine ▁solution , ▁depending ▁on ▁their ▁design . ▁When ▁the ▁band ▁is ▁infl ated ▁with ▁sal ine ▁solution , ▁it ▁places ▁pressure ▁around ▁the ▁outside ▁of ▁the ▁st om ach . ▁This ▁decre ases ▁the ▁size ▁of ▁the ▁passage ▁between ▁the ▁p ouch ▁created ▁from ▁the ▁upper ▁part ▁of ▁the ▁st om ach ▁and ▁the ▁lower ▁st om ach ▁and ▁further ▁restrict s ▁the ▁movement ▁of ▁food . ▁Over ▁the ▁course ▁of ▁several ▁vis its ▁to ▁the ▁doctor , ▁the ▁band ▁is ▁filled ▁until ▁the ▁optimal ▁restriction ▁has ▁been ▁achieved ▁– ▁neither ▁so ▁loose ▁that ▁hung er ▁is ▁not ▁controlled , ▁nor ▁so ▁tight ▁that ▁food ▁cannot ▁move ▁through ▁the ▁dig est ive ▁system . ▁The ▁number ▁of ▁adjust ments ▁required ▁is ▁an ▁individual ▁experience ▁and ▁cannot ▁be ▁accur ately ▁predicted . ▁ ▁Types ▁of ▁adjust able ▁bands ▁ ▁In ▁the ▁U . S . ▁market , ▁two ▁types ▁of ▁adjust able ▁g astr ic ▁bands ▁have ▁been ▁approved ▁by ▁the ▁F DA : ▁Real ize ▁Band ▁and ▁Lap - B and . ▁The ▁Lap - B and ▁System ▁obtained ▁F DA ▁appro val ▁in ▁ 2 0 0 1 . ▁The ▁device ▁comes ▁in ▁five ▁different ▁sizes ▁and ▁has ▁under g one ▁modification ▁over ▁the ▁years . ▁The ▁latest ▁models , ▁the ▁Lap - B