A conscious and alert adult is brought to the emergency department 30 minutes after ingesting an unknown quantity of sustained-release tablets. The patient is hemodynamically stable. Which gastrointestinal decontamination method is most likely to be considered for this patient?

1. A

   Inducing emesis with syrup of ipecac

2. B

   Administering a single dose of activated charcoal

3. C

   Performing whole-bowel irrigation with polyethylene glycol

4. D

   Initiating gastric lavage with a large-bore orogastric tube

Appeared in: NORCET 1 - 2020

Explanation

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• Whole-bowel irrigation (WBI) is the indicated method for potentially toxic ingestions of sustained-release or enteric-coated medications.
• Sustained-release tablets are designed to dissolve slowly and release the drug over many hours. WBI physically flushes the entire GI tract to prevent this prolonged absorption.
• Since the drug is released over an extended period and along the length of the intestine, methods that only target the stomach contents are less effective.
• The patient's stable condition and the recent ingestion of a sustained-release product make WBI a primary consideration to prevent future toxicity as more of the drug is absorbed over time.

Why Other Options Were Wrong

• Option A: Inducing emesis with syrup of ipecac is an outdated practice. It is no longer recommended by major medical associations due to its limited efficacy, potential to cause prolonged vomiting, and risk of aspiration.
• Option B: A single dose of activated charcoal is less effective for sustained-release tablets because it only adsorbs the drug present in the stomach at the time of administration. It does not affect the drug that is released from the tablets later as they travel through the intestines.
• Option D: Gastric lavage is an invasive procedure with significant risks (e.g., aspiration, esophageal perforation) and limited efficacy. It is especially ineffective for tablets, which are often too large to be removed through the tube. Its use is restricted to very specific, life-threatening ingestions within the first hour.

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Clinical Relevance

• Nursing practice connection: Prioritize focused assessment, early escalation, and real-time monitoring when managing Gastrointestinal decontamination methods for poisoning in acute care settings.
• A nurse's role in WBI is critical. It involves setting up the infusion, administering the solution via NG tube, meticulously monitoring the patient for complications like vomiting, abdominal distension, and aspiration, and assessing the rectal effluent to determine the endpoint of therapy.
• Patient safety during WBI requires maintaining the patient in an upright or semi-recumbent position to prevent aspiration, which is a major risk.
• What if the ingested tablets were standard-release iron tablets? WBI would still be the correct answer. Iron is poorly adsorbed by activated charcoal, so physically flushing it from the GI tract with WBI is a primary decontamination strategy.

How to Approach the Question

• First, identify the key elements in the clinical scenario: a conscious patient, a specific type of ingestion ('sustained-release tablets'), and the time since ingestion (30 minutes).
• The keyword 'sustained-release' is critical. It signals that the drug will be absorbed over a long period and throughout the length of the intestine, not just in the stomach.
• Evaluate each decontamination option based on this key information. Consider which method would be effective for a substance that is continuously released along the GI tract.
• Rule out outdated or high-risk procedures. Syrup of ipecac is no longer used. Gastric lavage is rarely indicated and is ineffective for tablets.
• Differentiate between the remaining, more modern options (Activated Charcoal vs. WBI). Recognize that a single dose of charcoal will have limited effect on a sustained-release product, making WBI the most logical choice for flushing the entire system.

Concept Tested & Keywords

• Concept Tested: Gastrointestinal decontamination methods for poisoning
• Stem keywords: conscious and alert, sustained-release tablets, gastrointestinal decontamination
• Lead-in keywords: most likely
• Clinical cues: Ingestion of sustained-release tablets, which have a prolonged absorption profile.
• Clinical cues: Patient is conscious and alert, indicating no immediate compromise of the airway.

Question ID

Q7xlbferRvWOpH_PhwnH40

Copy ID

Reference Book

E6 Medicine Harrison 22e Part 2 p. 1612-1614

E6 Ghai Essential Pediatrics(pp 26-904 of 913) p. 752-754