Crystals in Urine: Alkaline Urine

Crystals in Alkaline Urine
These are as under :
i. Amorphous phosphate
ii. Triple phosphate
iii. Calcium carbonate
iv. Ammonium biurate

i) Amorphous Phosphate
They are seen as colourless granules in the form of
clumps or irregular aggregates .They dissolve
when urine is made acidic.

ii) Triple Phosphate
They are in the form of prisms and sometimes in fern
leaf pattern .They dissolve when urine is
made acidic.

iii) Calcium Carbonate
They are in the form of granules, spheres or rarely
dumbbell-shaped. They again dissolve in
acidic urine.

iv) Ammonium Biurate
They are round or oval yellowish-brown spheres with
thorns on their surface giving ‘thorn apple’ appearance
. They dissolve on heating the urine or by
making it acidic.

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