A nurse is preparing a newborn with a myelomeningocele sac for surgery. The most appropriate intervention to keep the site sterile and protected is to?

Appeared in: NORCET -4 , 2023

Explanation

Covering the sac with a sterile, moist, saline dressing is the standard of care for pre-operative management of myelomeningocele.
This intervention keeps the exposed neural tissues hydrated, preventing desiccation and subsequent necrosis.
The moist dressing acts as a protective barrier against environmental contaminants, reducing the risk of central nervous system infection (meningitis).
The dressing should be non-adherent to prevent tearing the fragile sac upon removal.

Option A: Leaving the sac exposed to air would cause the delicate neural tissue to dry out, leading to tissue damage, necrosis, and an increased risk of rupture and infection.
Option B: Petroleum jelly is not sterile and can be toxic to neural tissue. It can also cause the dressing to adhere to the sac, leading to tearing and a CSF leak upon removal.
Option D: A dry dressing would adhere to the moist surface of the myelomeningocele sac. Removing it would cause trauma, likely tearing the sac and creating a portal for infection.

Visual 1: Diagram - An illustration showing the three types of spina bifida (occulta, meningocele, and myelomeningocele) to clarify the anatomy of the defect.
Visual 2: Clinical Photo - A photo of a newborn in the prone position with a sterile, moist saline dressing correctly applied over a myelomeningocele sac, demonstrating proper pre-operative care.

Clinical Relevance

Nursing practice connection: Knowing Pre-operative nursing care for a newborn with myelomeningocele helps nurses interpret findings accurately and avoid errors in routine assessment, medication administration, and patient teaching.
Protecting the myelomeningocele sac is a critical nursing priority to prevent meningitis, which can lead to severe neurological complications or death.
Nurses must handle the infant with extreme care, always positioning them to avoid pressure on the sac.
What if? If sterile saline is not available immediately, a sterile, non-adherent dressing should still be used to cover the sac, and sterile water could be a temporary alternative until saline is obtained, but saline is preferred as it is isotonic.

How to Approach the Question

First, identify the core of the question: it asks for the 'most appropriate' pre-operative intervention for a myelomeningocele sac.
Recall the pathophysiology of myelomeningocele: it involves exposed, delicate neural tissue and meninges.
Analyze the primary risks associated with this condition before surgery: infection, drying (desiccation) of the tissue, and physical injury/rupture.
Evaluate each option based on how well it mitigates these risks.
Option A (air exposure) fails to prevent drying. Option B (petroleum) is non-sterile and potentially toxic. Option D (dry dressing) will adhere and cause injury.
Conclude that Option C (moist, saline dressing) is the only choice that effectively prevents drying, protects from infection, and minimizes risk of injury.

Concept Tested & Keywords

Concept Tested: Pre-operative nursing care for a newborn with myelomeningocele.
Stem keywords: newborn, myelomeningocele sac, surgery, intervention, sterile, protected
Lead-in keywords: most appropriate
Clinical cues: The presence of a myelomeningocele sac indicates an open neural tube defect, requiring immediate, specific care to prevent infection and tissue damage.

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Practise the full NORCET -4 , 2023

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