The nurse has just inserted a nasogastric tube for gastric suction. What is the most reliable test for confirming tube placement?
1. Place the stethoscope over the stomach and listen while inserting water into the tube for a swishing sound.
2. Place the stethoscope over the stomach and listen while inserting air into the tube for a swishing sound.
3. Aspirate stomach contents and check the acidity using a pH test strip.
4. Connect the tube to suction and observe the contents.
Correct Answer: 3
Rationale 1: Water should not be inserted into the tube until placement is confirmed.
Rationale 2: This is done to ensure placement however it is not the most reliable test.
Rationale 3: Aspirate stomach contents and check the acidity using a pH test strip is the most reliable test to confirm tube placement.
Rationale 4: Connecting the tube to suction should not be done until tube placement has been confirmed.
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