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CSMLS Urinalysis and Body Fluids Flashcards

6 cards from real CSMLS practice questions. Tap to flip, then mark Knew It or Still Learning — missed cards come back until you master them.

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  1. Glucose in urine (glucosuria) typically appears when blood glucose exceeds the renal threshold of approximately:

    Answer: 10 mmol/L

    Glucosuria occurs when blood glucose exceeds approximately 10 mmol/L (180 mg/dL), saturating the tubular reabsorption capacity.

  2. In cerebrospinal fluid (CSF) analysis, xanthochromia (yellow discoloration) indicates:

    Answer: Previous subarachnoid hemorrhage

    Xanthochromia results from oxyhemoglobin and bilirubin released by lysed red blood cells after subarachnoid hemorrhage.

  3. Normal CSF total protein is approximately:

    Answer: 0.15–0.45 g/L

    Normal CSF total protein ranges from 0.15 to 0.45 g/L, which is much lower than plasma protein levels due to the blood-brain barrier.

  4. Pleural fluid with a protein concentration greater than 30 g/L is classified as:

    Answer: Exudate

    Exudates have protein greater than 30 g/L (or LDH-based Light's criteria), indicating inflammation, infection, or malignancy as the cause.

  5. Synovial fluid from a patient with gout would typically show:

    Answer: Negatively birefringent needle-shaped crystals under polarized light

    Gout is characterized by negatively birefringent, needle-shaped monosodium urate crystals identified under compensated polarized light microscopy.

  6. Proteinuria detected on a urine dipstick is most sensitive for:

    Answer: Albumin

    The urine dipstick protein reaction uses a pH indicator dye that is most sensitive to albumin and may miss other protein types.