A nurse is preparing a child who has suspected bacterial meningitis for a lumbar puncture. Which of the following cerebrospinal fluid findings supports the diagnosis?
Decreased WBCs.
Elevated glucose.
Elevated total protein.
Decreased pressure.
The Correct Answer is C
Choice A rationale:
Decreased white blood cells (WBCs) in cerebrospinal fluid (CSF) would not support the diagnosis of bacterial meningitis. In bacterial meningitis, the presence of bacteria triggers an inflammatory response, leading to an increase in WBCs in the CSF (pleocytosis).
Choice B rationale:
Elevated glucose levels in CSF would actually be more consistent with viral rather than bacterial meningitis. In bacterial meningitis, glucose levels are typically decreased due to the high metabolic demands of bacteria on the glucose present in the CSF.
Choice C rationale:
Elevated total protein in cerebrospinal fluid (CSF) is indicative of inflammation and disruption of the blood-brain barrier. Bacterial meningitis causes an intense inflammatory response, leading to an increase in total protein in the CSF.
Choice D rationale:
Decreased pressure in the CSF would not be a characteristic finding in bacterial meningitis. In fact, bacterial meningitis often leads to an increase in CSF pressure due to the inflammation and accumulation of inflammatory cells and proteins.
Nursing Test Bank
Naxlex Comprehensive Predictor Exams
Related Questions
Correct Answer is B
Explanation
Choice A rationale:
Urine osmolality 500 mOsm/kg. Urine osmolality is a measure of urine concentration and is not a reliable indicator of infection. It reflects the kidney's ability to concentrate urine and can vary based on hydration status and other factors. An elevated urine osmolality could suggest dehydration, not necessarily infection.
Choice B rationale:
WBC 17,500/mm3. This is the correct choice. An elevated white blood cell count (WBC) is a hallmark sign of infection. The body's immune response to an infection often includes an increase in WBC count, particularly the neutrophil count. This elevation is known as leukocytosis and is a red flag for infection.
Choice C rationale:
BUN 12 mg/dL. Blood Urea Nitrogen (BUN) measures kidney function and hydration status. While an elevated BUN can indicate dehydration, it is not a specific marker for infection. BUN levels can be influenced by various factors, including diet and renal function.
Choice D rationale:
Urine specific gravity 1.014. Urine-specific gravity reflects the concentration of solutes in urine and the kidney's ability to concentrate or dilute urine. While changes in urine specific gravity can indicate dehydration or overhydration, it is not a direct indicator of infection. An infection is better detected through changes in WBC count and other clinical signs.
Correct Answer is C
Explanation
Choice A rationale:
A 2 cm scalp laceration, while a concern, is not the nurse's priority in this scenario. The child's head injury could potentially be serious, but priority should be given to neurological assessments and signs of increased intracranial pressure.
Choice B rationale:
Nasal discharge negative for glucose is not indicative of a major issue in this context. While cerebrospinal fluid (CSF) leaking from the nose after head trauma is a concern, it is not mentioned in this scenario, and this choice does not take precedence over other neurological signs.
Choice C rationale:
This is the correct answer. Asymmetric pupils can be a sign of a serious neurological issue, such as a brain injury or increased intracranial pressure. It requires immediate attention and further evaluation to assess the child's neurological status and determine the extent of the injury.
Choice D rationale:
A negative Babinski reflex is a normal finding in this context and does not require immediate priority attention. The Babinski reflex is typically present in infants and disappears as the child grows older. Its absence is expected in older children and adults.
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