I was the one who developed the policy and it has been going well in our inpatient units but not in the ER. One occurence recently was: A Small Bowel Obstruction, NG placed, sucked 1500ml of fluid out and the pH is higher due to it originating in the bowel. They knew it wass in because of the amount of fluid, but the pH is too high. My policy states that confirmation will be made by pH only, and radiography can be sought if placement is still in question. Do you think there can be something added, like waiting a certain amount of time and rechecking?