Before operation purpose of neomycin administration?

Appeared in: PGIMER NO - 2020

Explanation

The primary clinical purpose of administering neomycin before bowel surgery is to prevent post-operative surgical site infections (SSIs).
Neomycin is an antibiotic that acts locally within the gastrointestinal tract to reduce the population of bacteria.
This reduction in bacterial load, often called bowel sterilization, minimizes the risk of infection if the bowel is opened or perforated during the surgical procedure.
This is a key component of infection control protocols for colorectal and other specific types of abdominal surgeries.

Option B: This describes the drug's mechanism of action, not its ultimate clinical purpose. The reason for decreasing bacterial growth is to achieve the goal of preventing infection.
Option C: Neomycin is an antibiotic and is not used to prevent or treat constipation. Laxatives and enemas are used for bowel evacuation pre-operatively.
Option D: Preventing gas formation is not the therapeutic goal of neomycin administration. Changes in gas production would be a side effect of altering the gut microbiome, not the primary intent.

Clinical Relevance

Nursing practice connection: This is primarily an exam-oriented knowledge point with limited direct bedside application, so retain Preoperative Antibiotic Prophylaxis as background academic context rather than a clinical decision trigger.
Nurses are responsible for the timely administration of pre-operative antibiotics. For maximum effectiveness, they are typically given within 60 minutes before the surgical incision.
Patient education is crucial. The nurse should explain that the medication is to help prevent an infection after surgery, which can improve patient adherence and reduce anxiety.
Monitoring for side effects is a key nursing role. Neomycin can cause diarrhea; the nurse should monitor for dehydration and electrolyte imbalances.

How to Approach the Question

First, identify the key components of the question: the drug (neomycin) and the timing (before an operation).
Recall the drug class of neomycin. It is an antibiotic.
Ask yourself the fundamental question: 'What is the primary reason for giving an antibiotic before surgery?' The most common and critical reason is to prevent infection.
Evaluate the options to differentiate between the ultimate clinical goal and the mechanism of action.
Option A, 'Prevent post-operative infection,' represents the overall clinical goal and the reason for the intervention.
Option B, 'Decrease bacterial growth,' describes how the drug achieves that goal (its mechanism). In questions asking for the 'purpose,' the overarching goal is typically the best answer.

Concept Tested & Keywords

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E6 Nursing Fundamentals Potter Perry 12e Part 6 p. 184-186

E6 Nursing Brunner Adult Health 3SA Vol 1 Part 1 p. 64-66

E6 Gynecology Williams p. 414-420

Practise the full PGIMER NO - 2020

Attempt every question from this paper in a timed mock, then review the full solution for each one.