Which of the following is a possible cause of a musty odor in urine?
Dehydration.
Consumption of alcohol.
Consumption of blackberries.
PKU (Phenylketonuria).
The Correct Answer is D
Choice A rationale
Dehydration concentrates the urine, which typically leads to a darker amber color and a stronger, more pungent odor due to concentrated metabolic waste products, particularly urea. It does not typically produce a musty or mousy odor, which is associated with specific inborn errors of metabolism affecting amino acid degradation pathways.
Choice B rationale
Consumption of alcohol is metabolized primarily in the liver by alcohol dehydrogenase and aldehyde dehydrogenase. While it is a diuretic that can affect urine volume, its consumption does not inherently cause a musty odor. This odor is a distinctive sign of a metabolic disorder affecting volatile organic compounds.
Choice C rationale
Consumption of blackberries or other strong-colored foods can alter the color of the urine (sometimes reddish) and may impart a faint, unusual scent due to the excretion of certain pigments or aromatic compounds. However, this dietary influence does not result in the characteristic, pathognomonic musty or mousy smell.
Choice D rationale
Phenylketonuria (PKU) is an autosomal recessive disorder where a deficiency in the enzyme phenylalanine hydroxylase impairs the metabolism of the amino acid phenylalanine. The accumulation of its metabolites, especially phenylacetate, which is excreted in the urine, sweat, and breath, results in a distinct 𝐦𝐮𝐬𝐭𝐲 or 𝐦𝐨𝐮𝐬𝐲 odor.
Nursing Test Bank
Naxlex Comprehensive Predictor Exams
Related Questions
Correct Answer is ["20"]
Explanation
Step 1 is to convert the child's weight from pounds (lbs) to kilograms (kg). 44 lbs÷ 2.2 kg/lb = 20 kg. The final calculated answer is 20 kg.
Correct Answer is A
Explanation
Choice A rationale
A prolonged second stage of labor requires the mother to maintain the lithotomy position (hips flexed, knees flexed, and legs abducted) in stirrups for an extended period. This position, particularly when combined with potential trauma to the vasculature during birth, causes compression of the popliteal veins and decreased blood flow, significantly increasing the risk of venous stasis and subsequent formation of a deep vein thrombosis (DVT), a form of thrombophlebitis, in the lower extremities.
Choice B rationale
Uterine subinvolution, the failure of the uterus to return to its non-pregnant state, is typically caused by retained placental fragments or endometritis (infection). While it is a common postpartum complication, it is not primarily associated with the mechanical factors of a prolonged second stage or extended time in the stirrups, which primarily impact the lower extremity circulation.
Choice C rationale
Retained placental fragments are the most common cause of secondary postpartum hemorrhage and are associated with a prolonged third stage of labor (after the baby's birth), not the second stage (pushing phase). The risk factors include manual removal of the placenta, previous cesarean birth, or placenta accreta, not simply the duration of pushing or positioning in stirrups.
Choice D rationale
Hypertension, including preeclampsia or gestational hypertension, is a condition that usually precedes and complicates labor, and is characterized by elevated blood pressure, often with proteinuria. It is a systemic vascular disorder, and its pathophysiology is not directly linked to the mechanical stress of a prolonged second stage of labor or the positioning in stirrups.
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