Final answer:
The insertion of a nasogastric tube is contraindicated in the presence of intestinal perforation, but not in the presence of bowel obstruction, GERD, or gastric ulcer.
Step-by-step explanation:
The insertion of a nasogastric tube is contraindicated when performing gastric decompression in the presence of intestinal perforation. When the mucus lining of the stomach ruptures and does not reform, an open wound is formed, which may be caused by bacteria. In this case, inserting a nasogastric tube can further exacerbate the perforation and lead to complications.
On the other hand, bowel obstruction, gastroesophageal reflux disease (GERD), and gastric ulcer are not contraindications for the insertion of a nasogastric tube during gastric decompression.