A patient is unconscious nurse is going to take the sterile urine sample for culture from the urinary catheter. What technique is to be used by the nurse?

Appeared in: NORCET 2 -2021 (Shift-2)

Explanation

The correct method is to aspirate fresh urine from the catheter's sampling port using a sterile syringe.
This technique maintains the closed drainage system, preventing the introduction of pathogens.
It ensures the collection of a fresh, uncontaminated sample directly from the bladder's output, which is crucial for an accurate culture and sensitivity test.
The term 'needle aspiration through tubing' refers to this process of using the special port on the catheter tubing.

Option A: Taking a sample from the urinary bag is incorrect because the urine is not fresh and is considered contaminated with bacteria that have multiplied over time.
Option B: Using a sterile syringe does not make the sample sterile if the source (the urinary bag) is contaminated. The urine in the bag has been stagnant, allowing bacterial growth.
Option C: Disconnecting the bag from the port breaks the sterile, closed system. This creates a direct entry point for microorganisms into the patient's urinary tract.

Clinical Relevance

Nursing practice connection: Use the key finding related to Aseptic technique for collecting a sterile urine sample from an indwelling urinary catheter to guide bedside assessment, documentation, and the next nursing action.
Proper sample collection is critical for accurately diagnosing a Urinary Tract Infection (UTI) and guiding appropriate antibiotic therapy, preventing treatment failure or antibiotic resistance.
Preventing Catheter-Associated Urinary Tract Infections (CAUTIs) is a major patient safety priority. Adhering to aseptic technique during any catheter manipulation, including sample collection, is a key nursing responsibility.
What if? If a patient needs a urine culture but does not have a catheter, the nurse would instruct them on how to provide a clean-catch midstream urine specimen to ensure a similarly uncontaminated sample.

How to Approach the Question

First, identify the key requirements of the task: obtaining a 'sterile' sample for 'culture' from a 'urinary catheter'.
The word 'sterile' immediately signals that aseptic technique is paramount and contamination must be avoided.
The source, a 'urinary catheter', implies a closed drainage system that should not be broken.
Evaluate each option against these two principles: maintaining sterility and preserving the closed system.
Options A and B involve the drainage bag, which is a known source of contamination. Eliminate them.
Option C involves disconnecting the system, which is a major breach of infection control. Eliminate it.

Concept Tested & Keywords

Concept Tested: Aseptic technique for collecting a sterile urine sample from an indwelling urinary catheter.
Stem keywords: unconscious, sterile urine sample, culture, urinary catheter
Lead-in keywords: What technique
Clinical cues: The need for a 'sterile' sample for 'culture' dictates that the procedure must prevent contamination.

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E6 Nursing Fundamentals Taylor p. 692-694

E6 Nursing Vital Signs p. 53-55

Practise the full NORCET 2 -2021 (Shift-2)

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