The nurse places a nasogastric tube (NGT) as ordered by the physician.
When confirming placement, the nurse aspirates stomach contents and measures the gastric pH at 3. What should the nurse do next?
Secure the tube and retest the pH in one hour.
Insert the tube an additional 1-2 inches and retest the pH.
Auscultate for the "swoosh" of air.
Obtain an x-ray to confirm placement.
The Correct Answer is D
Choice A rationale
Securing the tube and retesting the pH in one hour is insufficient to confirm correct placement. While a pH of 3 suggests gastric placement (normal gastric pH is typically 1.5 to 3.5), it doesn't definitively rule out placement in the respiratory tract or intestines, as these can occasionally have acidic pH levels. Delaying definitive confirmation could lead to serious complications if the tube is misplaced.
Choice B rationale
Inserting the tube an additional 1-2 inches and retesting the pH is not a reliable method for confirming placement. Advancing the tube further without radiographic confirmation could increase the risk of trauma to the gastrointestinal tract or even pulmonary aspiration if the initial placement was incorrect. pH testing alone is not conclusive.
Choice C rationale
Auscultating for the "swoosh" of air while injecting air into the NG tube is an outdated and unreliable method for confirming placement. The sound can be misleading and may be heard even if the tube is incorrectly positioned in the esophagus or lungs. This method does not provide definitive proof of gastric placement and poses a risk of aspiration.
Choice D rationale
Obtaining an x-ray is the gold standard for confirming nasogastric tube placement. Radiographic imaging allows for direct visualization of the tube's trajectory and ensures that the distal tip is correctly positioned in the stomach or duodenum. This method provides the most accurate and reliable confirmation, minimizing the risk of complications such as aspiration or misadministration of feedings and medications.
Nursing Test Bank
Naxlex Comprehensive Predictor Exams
Related Questions
Correct Answer is A,B,C,D
Explanation
Choice A rationale
Verifying tube placement is the initial critical step to ensure the feeding is delivered into the gastrointestinal tract and not the respiratory system, thereby preventing aspiration. Methods for verification include pH testing of aspirate (target pH ≤ 5.5), and radiographic confirmation is the gold standard, especially after initial placement.
Choice B rationale
Checking the residual feeding contents before administering a new feeding is essential to assess the client's tolerance to the previous feeding and prevent overfeeding, which can lead to complications like abdominal distension, nausea, vomiting, and aspiration. A high residual volume may indicate delayed gastric emptying.
Choice C rationale
Administering the feeding follows confirmation of tube placement and assessment of residual volume. The feeding should be administered at the prescribed rate and volume, ensuring the client receives adequate nutrition and hydration. The client should be positioned with the head of the bed elevated at least 30-45 degrees during and for at least 30-60 minutes after feeding to minimize aspiration risk.
Choice D rationale
Evaluating the client's tolerance to the feeding is an ongoing process that involves monitoring for signs and symptoms such as abdominal distension, pain, nausea, vomiting, diarrhea, or aspiration. This evaluation helps determine if the feeding regimen needs adjustment in terms of rate, volume, or formula.
Correct Answer is D
Explanation
Choice A rationale
While prostate enlargement is common in older men, it is not typically directly associated with bilateral gynecomastia. Gynecomastia primarily involves breast tissue enlargement due to hormonal imbalances, not glandular changes related to the prostate. Recommending prostate screening solely based on gynecomastia is not the most direct or scientifically sound approach.
Choice B rationale
Acknowledging gynecomastia as benign breast enlargement without further investigation might be premature. While some cases in older men are benign and related to aging, it can also be a symptom of underlying medical conditions or medication side effects that require evaluation. Dismissing it without investigation could miss a treatable cause.
Choice C rationale
A mammogram is a screening tool for breast cancer, which is rare in men but possible. However, gynecomastia is characterized by benign glandular tissue proliferation, distinct from the tissue changes typically associated with male breast cancer. While a physician might order one to rule out malignancy, it's not the initial recommended action based solely on the finding of bilateral gynecomastia.
Choice D rationale
Gynecomastia in men can result from various hormonal changes, including a decrease in testosterone levels relative to estrogen, or an increase in estrogen production. Certain medical conditions and medications can also disrupt hormonal balance. Recommending a physician visit to investigate potential underlying causes of hormonal changes is the most appropriate initial action to determine the etiology of the gynecomastia and guide further management.
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