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Patients suffering from low bone density, hypercalciuria, and stone formation should increase daily fluid consumption and focus on a low sodium and low protein diet. Reducing calcium intake to attempt to remedy elevated urine calcium has been shown to further progress bone loss without an effect on urine calcium loss. [4]
Careful dietary decisions should be taken since a deficient calcium intake diet accompanies the risk of excessive bone loss and can increase the absorption of dietary oxalates, found in many leafy greens and vegetables, which combine with calcium in the intestines, [29] and form oxalate kidney stones. [8]
Hypercalcemia usually causes symptoms that lead to chronic dehydration, such as nausea, vomiting, anorexia, and nephrogenic diabetes insipidus (inability of the kidney to concentrate the urine). IV fluid rehydration allows the kidneys to excrete more calcium, and usually lowers the calcium level by 1–2 mg/dL. [22]
Some of the oxalate in urine is produced by the body. Calcium and oxalate in the diet play a part but are not the only factors that affect the formation of calcium oxalate stones. Dietary oxalate is found in many vegetables, fruits, and nuts. Calcium from bone may also play a role in kidney stone formation. Calcium phosphate: 10–20%
Milk-alkali syndrome (MAS), also referred to as calcium-alkali syndrome, is the third most common cause of elevated blood calcium levels (hypercalcemia). [2] [3] Milk-alkali syndrome is characterized by hypercalcemia, metabolic alkalosis, and acute kidney injury.
Kidney showing circumscribed calcium deposits together with a partial stag horn calculus. Nephrocalcinosis , once known as Albright's calcinosis after Fuller Albright , is a term originally used to describe the deposition of poorly soluble calcium salts in the renal parenchyma due to hyperparathyroidism .
The predominant symptoms of hypercalcemia are abdominal pain, constipation, extreme thirst, excessive urination, kidney stones, nausea and vomiting. [ 3 ] [ 14 ] In severe cases where the calcium concentration is >14 mg/dL, individuals may experience confusion, altered mental status, coma, and seizure.
Osteoporosis, osteomalacia and rickets are bone disorders linked to calcium metabolism disorders and effects of vitamin D. Renal osteodystrophy is a consequence of chronic kidney failure related to the calcium metabolism. A diet adequately rich in calcium may reduce calcium loss from bone with advancing (post-menopausal) age. [30]