Which finding corresponds to crenated red blood cells in urine?

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Multiple Choice

Which finding corresponds to crenated red blood cells in urine?

Explanation:
Crenated red blood cells appear when urine is hypertonic, meaning it has a high osmolality. In such concentrated urine, water moves out of the red blood cells by osmosis, causing them to shrink and develop irregular, spiky edges. This is most consistent with hypersthenuria, which is increased urine osmolality or concentration. Polyuria would produce dilute urine with lower osmolality, so RBCs are less likely to crenate. Galactosuria is simply the presence of galactose in urine and doesn’t dictate RBC shape. Hyposthenuria refers to an impaired ability to concentrate urine, typically yielding dilute urine rather than crenated cells.

Crenated red blood cells appear when urine is hypertonic, meaning it has a high osmolality. In such concentrated urine, water moves out of the red blood cells by osmosis, causing them to shrink and develop irregular, spiky edges. This is most consistent with hypersthenuria, which is increased urine osmolality or concentration.

Polyuria would produce dilute urine with lower osmolality, so RBCs are less likely to crenate. Galactosuria is simply the presence of galactose in urine and doesn’t dictate RBC shape. Hyposthenuria refers to an impaired ability to concentrate urine, typically yielding dilute urine rather than crenated cells.

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