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Difficulty: MediumReduction of Risk Potential

A practical nurse (PN) is preparing to collect a wound culture specimen from a client's stage 3 pressure injury. In what order should the PN perform the following actions to ensure an accurate specimen and reduce the risk of contamination? Arrange the actions in the correct sequence.

  1. 1Remove the soiled wound dressing and dispose of it in the appropriate receptacle.
  2. 2Cleanse the wound bed with prescribed sterile normal saline to remove surface exudate.
  3. 3Rotate the sterile culture swab over an area of clean, viable granulation tissue.
  4. 4Insert the swab into the sterile culture tube without touching the outside of the container.
  5. 5Label the specimen container in the presence of the client before sending it to the laboratory.

Answer

The correct sequence for obtaining a wound culture is to first remove the soiled dressing, then cleanse the wound with normal saline, next swab the viable tissue, followed by placing the swab in the culture tube, and finally labeling the specimen at the bedside.
Following the correct sequence ensures that the wound culture identifies the actual pathogen causing the infection rather than surface flora, and prevents cross-contamination or misidentification of the specimen.

Step-by-Step Solution

1
Remove the soiled wound dressing and dispose of it in the appropriate receptacle.
The wound bed is exposed for assessment and collection.
The old dressing contains surface bacteria and exudate that are not representative of the true infection and must be removed first.
2
Cleanse the wound bed with prescribed sterile normal saline to remove surface exudate.
Surface exudate and colonizing flora are washed away.
Culturing uncleaned exudate often yields colonizing bacteria rather than the pathogen responsible for the tissue infection, which can lead to inappropriate antibiotic therapy.
3
Rotate the sterile culture swab over an area of clean, viable granulation tissue.
The specimen is collected from actively infected, living tissue.
Pathogens grow best in viable tissue; swabbing slough or necrotic tissue may yield inaccurate diagnostic results.
4
Insert the swab into the sterile culture tube without touching the outside of the container.
The specimen is secured in the transport medium.
This maintains the sterility of the container's exterior, protecting healthcare workers and laboratory personnel from exposure to the pathogen.
5
Label the specimen container in the presence of the client before sending it to the laboratory.
The specimen is accurately identified with the correct client information.
Labeling at the bedside immediately after collection eliminates the risk of mixing up specimens and ensures accurate diagnostic reporting.

Key Concept

Wound Culture Specimen Collection Principles
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Topics

Reduction of Risk Potential

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