A nurse is reviewing the laboratory report of a newly admitted school-age child who has a fever. The nurse should identify which of the following laboratory results is an indication of an infection and should be reported to the charge nurse immediately.
Urine osmolality 500 mOsm/kg.
WBC 17,500/mm3.
BUN 12 mg/dL.
Urine specific gravity 1.014.
The Correct Answer is B
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.
Nursing Test Bank
Naxlex Comprehensive Predictor Exams
Related Questions
Correct Answer is A
Explanation
Choice A rationale:
A positive leukocyte esterase test indicates the presence of white blood cells (leukocytes) in the urine, which can be an indicator of a urinary tract infection (UTI). White blood cells are part of the body's immune response and their presence in the urine suggests inflammation and infection in the urinary tract.
Choice B rationale:
Deep gold-colored urine is not typically associated with a urinary tract infection. Normally, urine color can vary based on hydration, diet, and other factors, but color alone is not a reliable indicator of a UTI.
Choice C rationale:
The osmolality of 700 mOsm/L is not a specific finding related to urinary tract infections. Osmolality measures the concentration of particles in the urine and can vary based on hydration status. While it might be elevated in a concentrated urine sample, it is not a direct indicator of a UTI.
Choice D rationale:
A specific gravity of 1.015 is within the normal range and does not necessarily indicate a urinary tract infection. Specific gravity measures the concentration of solutes in the urine and can be influenced by hydration levels and kidney function. A UTI would primarily be indicated by the presence of white blood cells and other signs of infection in the urine.
Correct Answer is A
Explanation
Choice A rationale:
Correct Choice. Current pregnancy is a contraindication to administering the measles, mumps, and rubella (MMR) vaccine. The MMR vaccine contains live attenuated viruses, and it is generally contraindicated during pregnancy due to the potential risk to the developing fetus. Pregnant individuals should wait until after giving birth to receive the MMR vaccine.
Choice B rationale:
Mild ear infection is not a contraindication to administering the MMR vaccine. Mild illnesses, such as mild upper respiratory infections or low-grade fevers, are not typically considered contraindications for vaccination. In fact, immunization might be recommended in these cases to ensure protection against preventable diseases.
Choice C rationale:
A family history of seizures is not a contraindication to administering the MMR vaccine. Seizures are not known to be associated with the MMR vaccine. Therefore, a family history of seizures would not preclude an individual from receiving the vaccine.
Choice D rationale:
Severe peanut allergy is not a contraindication to administering the MMR vaccine. Allergies, including severe peanut allergies, are not considered contraindications for the MMR vaccine. Only individuals with a known severe anaphylactic allergy to a vaccine component (such as gelatin or neomycin) would have a contraindication to receiving the vaccine.
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