Final answer:
To irrigate an NG tube, insert the syringe into the tube, remove the clamp, hold the syringe tip down, and slowly inject saline evenly.
Step-by-step explanation:
The correct procedure for irrigating a nasogastric (NG) tube is as follows: first, insert the tip of the irrigating syringe into the end of the NG tube. Next, you should remove the clamp if there is one. Then hold the syringe with the tip pointed at the floor to utilize gravity in assisting the irrigation process. Inject the saline slowly and evenly, without using force or rapid injection to prevent causing any discomfort or complications. This meticulous approach helps ensure that the NG tube is effectively cleared without causing harm to the patient or disrupting the placement of the tube.