NORCET 3 - 2022 (Shif…: How to confirm right placement of the NG tube?

NORCET 3 - 2022 (Shift-1)

Medical & Surgical Nursing

Easy

Appeared in: NORCET 3 - 2022 (Shift-1)

Explanation

The most reliable bedside method for confirming NG tube placement is testing the pH of aspirated contents.
Gastric fluid is acidic, with a pH typically less than 5.5, which confirms the tube's tip is likely in the stomach.
The pH range of 3.5 to 5, as stated in the option, falls within the expected acidic range for gastric contents.
This method is evidence-based and recommended for routine checks before each feeding or medication administration.

Option B: Auscultating for bowel sounds or a 'whoosh' of air is an unreliable and outdated method. Sounds from the lungs or esophagus can be easily transmitted to the abdomen, giving a false confirmation of placement.
Option C: Taping the NG tube to the nose is a necessary step to secure the tube and prevent it from moving or falling out. It is part of the procedure but does not confirm the location of the tube's tip.
Option D: Marking the tube at the nostril after insertion is done to create a reference point. This mark helps the nurse to quickly assess if the tube has migrated or become dislodged, but it does not confirm the initial placement.

Clinical Relevance

Nursing practice connection: This is primarily an exam-oriented knowledge point with limited direct bedside application, so retain Nasogastric (NG) Tube Placement Verification as background academic context rather than a clinical decision trigger.
The single most critical reason to confirm NG tube placement is to prevent aspiration pneumonia, a potentially fatal complication that occurs if feedings or medications are administered into the lungs.
Nurses must verify placement before every single use of the tube (e.g., before each intermittent feeding, medication administration, or at the start of each shift for continuous feeds).
What if? If the aspirated fluid has a pH of 6.5, the nurse should NOT proceed with feeding or medication. This pH suggests the tube may be in the intestines or the respiratory tract. The nurse should reposition the patient, re-attempt aspiration and pH check, and if still in doubt, notify the provider and anticipate an order for an X-ray.

How to Approach the Question

First, identify the core of the question: it asks for a method to 'confirm' the 'right placement' of an NG tube.
Analyze each option based on current nursing best practices for procedural verification.
Option A suggests aspirating and checking pH. Recall that gastric contents are acidic. This is a known, reliable bedside test.
Option B suggests auscultation. Recall that this 'whoosh test' is widely taught to be unreliable and is no longer recommended as a primary confirmation method.
Option C suggests taping. This is for securing the tube, not confirming its location. Eliminate this option.
Option D suggests marking. This is for monitoring for displacement after confirmation, not for the initial confirmation itself. Eliminate this option.

Concept Tested & Keywords

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E6 Nursing Fundamentals Taylor pp. 668-670, 512-514

E6 Nursing Fundamentals Potter Perry 12e Part 6 p. 54-56