“Clamping” an NG tube is done to determine if a patient can safely have an NG tube removed. Here’s how to decide:
When the patient has had less than 200 cc of output over an 8-hour shift, you can attempt the clamping trial!
Check on the patient in 4 hours, and release the clamp and turn on suction to see how much residue comes rushing out. If the output is less than 100-200 cc then you can remove the NG tube and start the patient on clears.
From: Flashcard Machine