Kidney Stones

Kidney Stones

The formation of stones in the kidneys or urinary tract is a fairly common disorder. The stones are formed from the chemicals usually found in the urine such as uric acid, phosphorous, calcium and oxalic acid. They may vary in consistency from grit, sand and gravel-like obstructions to the size of the bird’s eggs.

Stones may form and grow because the concentration of a particular substance in urine exceeds its solubility. This disorder occurs more frequently in middle age, with men being afflicted more often than women.

The kidneys are two bean-shaped organs, lying below the waist on either side of the spinal column on the back wall of the abdomen. They are soft, reddish brown in colour, and, on an average, measure 10 cm. in length, 6 cm. in width and is 2.5 cm. thick at its centre. They are filtering plants for purifying the blood, removing water and salts from it which are passed into the bladder as urine.

Symptoms

Kidney stones usually cause severe pain in their attempt to pass down the ureter on their way to the bladder. The pain is first felt in the side and thereafter in the groin and thighs. Other symptoms of kidney stones are a desire to urinate frequently, painful urination, scanty urination, nausea, vomiting, sweating, chills and shocks. The patient may also pass blood with the urine. Sometimes, large stones may remain in the kidneys without causing any trouble and these are known as silent stones.

Causes

The formation of stones in the kidneys is the result of defects in the general metabolism. They usually occur when the urine becomes highly concentrated due to heavy perspiration or insufficient intake of fluids. They are aggravated by a sedentary lifestyle. The other causes are wrong diet, excess intake of acid-forming foods, white flour and sugar products, meat, tea, coffee, condiments and spices, rich foods and overeating. Lack of vitamin A and an excessive intake of vitamin B may also lead to formation of stones.

Types of Stones

Chemically, urinary stones are of two categories, namely, primary stones and secondary stones. Primary stones are ordinarily not due to infection and are formed in acidic urine. They usually result from alcoholism, sedentary life, constipation and excessive intake of nitrogenous or protein-rich foods. Secondary stones are due to local infection and are formed in alkaline urine. Most kidney stones are composed either of calcium oxalate or phosphate, the latter being most common in the presence of infection. About 90 per cent of all stones contain calcium as the chief constituent. More than half of these are mixtures of calcium, ammonia, and magnesium, phosphates and carbonates, while the remainder contains oxalate. Uric acid and cystine stones represent about four percent and one per cent respectively of the total incidence of stones.

Treatment

A majority of patients suffering from kidney stones can be treated successfully by proper dietary regulations. These regulations will also prevent a recurrence of the symptoms. Only a few cases require surgery.

The patient should avoid foods which irritate the kidneys, to control acidity or alkalinity of the urine and to ensure adequate intake of fluids to prevent the urine from becoming concentrated.

The foods considered irritants to the kidneys are alcoholic beverages, condiments, pickles, certain vegetables like cucumbers, raddishes, tomatoes, spinach, rhubarb, water-cress and those with strong aroma such as asparagus, onions, beans, cabbage and cauliflower, meat, gravies and carbonated waters.

In calcium phosphate stones, over -secretion of parathyroid hormone causes loss of calcium from the bones resulting in a high blood level of calcium with increased excretion of calcium in the urine. An abnormally high intake of milk, alkalies or vitamin D may also result in the formation of calcium phosphate stones.

For controlling the formation of calcium phosphate stones, a moderately low calcium and phosphorous diet should be taken. The intake of calcium and phosphates should be restricted to minimal levels consistent with maintaining nutritional adequacy.

The maintenance level of calcium is 680 mg. and of phosphorous 1000 mg. In this diet, milk should constitute the main source of calcium and curd or cottage cheese, lentils and groundnuts should form the main sources of phosphorous. Foods which should be avoided are whole wheat flour, Bengal gram, peas, soyabeans, beets, spinach, cauliflower, turnips, carrots, almonds and coconuts.

When stones are composed of calcium and magnesium phosphates and carbonates, the diet should be so regulated as to maintain acidic urine. In such a diet, only half a litre of milk, two servings of fruits and two servings of vegetables (200 grams) should be taken. The vegetables may consist of asparagus, fresh green peas, squash, pumpkins, turnips, cauliflower, cabbage and tomatoes. For fruits, watermelon, grapes, peaches, pears, pineapple, papayas and guavas may be taken.

On the other hand the urine should be kept alkaline if oxalate and uric acid stones are being formed. In this diet, fruits and vegetables should be liberally used and acid-forming foods should be kept to the minimum necessary for satisfactory nutrition. When the stones contain oxalate, foods with high oxalic acid content should be avoided. These foods include almonds, beetroots, brinjal, brown bread, cabbage, cherry, chocolate, French Beans, potatoes, radish, spinach and soyabeans.

Uric stones occur in patients who have an increased uric acid in the blood and increased uric acid exertion in the urine. Since uric acid is an end product of purine metabolism, foods with high purine content such as sweet bread, liver and kidney should be avoided.

Kidney beans, also known as French beans or common beans, are regarded as a very effective remedy for kidney problems, including kidney stones. The method to prepare the medicine is to remove the beans inside the pods, then slice the pods and put about 60 mg. in four litres of hot water, boiling slowly for four hours. This liquid should be strained through fine muslin and then allowed to cool for about eight hours. Thereafter, the fluid should be poured through another piece of muslin without stirring.

A glassful of this decoction should be given to the patient every two hours through the day for one day, and thereafter it may be taken several times a week. This decoction will not work if it is more than 24 hours old. The pods can be kept for longer periods but once they are boiled, the therapeutic factor disappears after one day.

The basil, known as tulsi in the vernacular, has a strengthening effect on the kidneys. In case of kidney stones, basil juice and honey should be taken for six months. It has been found that the stones can be expelled from the urinary tract with this treatment. The celery is also a valuable food for those who are prone to stone formation in the kidneys or the gall bladder. Its regular use prevents future tone formation.

Research has shown the remarkable therapeutic success of vitamin B6 or pyridoxine in the treatment of kidney stones. This treatment has to be continued for several months for obtaining a permanent cure.

The patient should take a low protein diet, restricting protein to one gram per kg. of food. A liberal intake of fluid upto 3,000 ml. or more daily is essential to prevent the production of urine at the concentration level where the salts precipitate out.

The patient should be given a large hot enema, followed by a hot bath with a temperature of 100oF, gradually increased to 112oF. The head should be kept cold with cold application. Hot fomentation applied across the back in the region of the kidneys will relieve the pain. Certain yogasanas such as pavan-muktasana, uttanpadasana, bhujangasana, dhanursana and halasana are also highly beneficial as they stimulate the kidneys.

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