In a bed sore patient, a swab sample is taken from?

SGPGI Nursing Officer-2023

Medical & Surgical Nursing

Medium

Appeared in: SGPGI Nursing Officer-2023

Explanation

The correct option describes the essential preparatory step for obtaining an accurate wound culture.
Cleaning the wound with a non-antiseptic solution like normal saline is crucial to remove surface contaminants, skin flora, and necrotic debris.
This ensures that the culture specimen contains the microorganisms actually causing the infection in the viable tissue, rather than just colonizing bacteria.
Failure to clean the wound first can lead to incorrect identification of pathogens and inappropriate antibiotic therapy.

Option A: Dressing drainage is exposed to the environment and contains old exudate and colonizing bacteria, which do not represent the true infecting organism in the wound bed.
Option B: Swabbing old, uncleaned exudate is incorrect because it is filled with surface contaminants and dead cells, not the bacteria causing the infection in the tissue.
Option C: Necrotic (dead) tissue harbors a high concentration of colonizing, often non-pathogenic, bacteria and does not reflect the infection within the viable, living tissue.

Clinical Relevance

Nursing practice connection: Use the key finding related to The concept tested is the correct procedure for collecting a wound culture specimen from a pressure ulcer to ensure diagnostic accuracy to guide bedside assessment, documentation, and the next nursing action.
Obtaining an accurate wound culture is fundamental to effective wound management. It guides the selection of the correct antibiotic, preventing treatment failure and the development of antibiotic resistance.
A common nursing error is swabbing pus or the dirtiest part of the wound. This leads to misleading results and poor patient outcomes. Proper technique is a key patient safety measure.
What if? If the patient is already on antibiotics, this information must be noted on the laboratory requisition form. Antibiotic use can affect the growth of bacteria and the culture results.

How to Approach the Question

First, understand the question is asking for the correct procedure for a diagnostic test (wound swab). The goal of such a test is accuracy.
Analyze the options in the context of obtaining a 'clean' and representative sample.
Consider what might contaminate a sample. Dressing drainage, old exudate, and dead tissue are all sources of contamination or non-pathogenic bacteria.
Recognize that preparing the site is a standard principle for many specimen collections to ensure accuracy.
Therefore, cleaning the wound before taking the sample is the most logical and correct step to isolate the true pathogen.
Select the option that describes this essential preparatory action.

Concept Tested & Keywords

Concept Tested: The concept tested is the correct procedure for collecting a wound culture specimen from a pressure ulcer to ensure diagnostic accuracy.
Stem keywords: bed sore, swab sample
Lead-in keywords: taken from
Negative lead-in flag: false

Qxbes1A5gP6uoHNx3NYqoz

E6 Nursing Fundamentals Potter Perry 12e Part 6 p. 82-84