JIPMER Pondicherry NO - 2022
Medical Surgical Nursing
Easy
Selective digestive decontamination is used to prevent?
Appeared in: JIPMER Pondicherry NO - 2022
Explanation
- Selective Digestive Decontamination (SDD) is a prophylactic strategy primarily used in intensive care units (ICUs).
- Its main purpose is to prevent nosocomial (hospital-acquired) infections, with a specific focus on Ventilator-Associated Pneumonia (VAP) and sepsis.
- The regimen works by applying topical, non-absorbable antibiotics to the digestive tract to eliminate potential pathogens.
- The 'selective' nature of SDD aims to eradicate harmful aerobic bacteria and yeasts while preserving the beneficial anaerobic flora, which helps maintain the body's natural defense against colonization by new pathogens.
Why Other Options Were Wrong
- Option A: SDD does not target the reflex pathways that cause vomiting. In fact, the administration of the oral paste can sometimes trigger a gag reflex in patients.
- Option B: While SDD aims to preserve gut flora to prevent superinfections, its primary goal is not to prevent diarrhea. Broad-spectrum antibiotic use, even topically, can sometimes disrupt gut balance and contribute to diarrhea.
- Option C: Abdominal distension is a physical sign of underlying issues such as bowel obstruction, ileus, or gas buildup. SDD is not designed to treat or prevent these mechanical or physiological problems.
Related Visual
Clinical Relevance
- Nursing practice connection: This is primarily an exam-oriented knowledge point with limited direct bedside application, so retain Purpose of Selective Digestive Decontamination (SDD) as background academic context rather than a clinical decision trigger.
- SDD is a critical infection control bundle component for high-risk, mechanically ventilated patients in the ICU to reduce morbidity, mortality, and length of stay associated with VAP.
- Nurses play a central role in SDD by ensuring meticulous oral hygiene before applying the antibiotic paste, administering the gastric suspension correctly, and maintaining strict aspiration precautions.
- Monitoring for the effectiveness of SDD (e.g., through surveillance cultures) and for potential side effects (like the emergence of resistant organisms or C. difficile) is a key nursing responsibility.
How to Approach the Question
- First, analyze the key terms in the question: 'Selective digestive decontamination'.
- The word 'decontamination' implies the removal or neutralization of harmful substances, which in a medical context often refers to microorganisms.
- The word 'selective' suggests that the process is targeted, not general. It aims to remove something specific while leaving other things.
- Evaluate the options in this context. Vomiting, diarrhoea, and abdominal distension are general gastrointestinal symptoms or signs.
- 'Infection' is a process caused by specific pathogenic microorganisms.
- Connecting the keywords, a procedure that 'selectively decontaminates' the digestive tract is most logically aimed at preventing 'infection' by targeting specific pathogens.
Concept Tested & Keywords
- Concept Tested: Purpose of Selective Digestive Decontamination (SDD)
- Stem keywords: Selective digestive decontamination, prevent
- Lead-in keywords: BEST, MOST RELEVANT CLUE
- Negative lead-in flag: false
Question ID
Qfve16g_496CqE-QGEVjzf
Reference Book
E6 Medicine Harrison 22e Part 1 p. 1071-1073
E6 Medicine Harrison 22e Part 2 p. 527-529
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Attempt every question from this paper in a timed mock, then review the full solution for each one.
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