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Q.
Formation of insoluble mass of crystallised salts in the kidney is
NTA AbhyasNTA Abhyas 2020
Solution:
Calculi and cast: - It is also termed as Kidney-stone. Due to deposition of Calcium-oxalate in the kidney, stone is formed. Sometimes, calcium - phosphate and calcium-sulphate are also found. These are insoluble-salts. Normally, these are not excreted by the urine.
Kidney stone (Renal calculus): It is formed by precipitation of uric acid or oxalate. It blocks the kidney tubule. It causes severe pain (renal colic) in the back, spreading down to thighs. The stone may pass into the ureter or urinary bladder and may grow, and cause severe pain of blockade. When in bladder, the patient experiences frequent and painful urination and may pass blood in the urine. Surgery may be needed to remove stone and relieve pain.