day and night urine specific gravity test

The day and night urine specific gravity test is also known as the modified Mosenthal test. According to the usual diet on the test day, the water content of each meal is limited to 500-600ml, and no liquid is consumed except for normal meals. Reference value 24 hours urine volume is 1000 ~ 2000ml, the ratio of urine volume to nocturia is 3 ~ 4:1, nocturia <750ml, the highest proportion of urine is above 1.020, the difference between the highest specific gravity and the lowest specific gravity, no Should be less than 0.009. Basic Information Specialist classification: urinary examination classification: urine / kidney function test Applicable gender: whether men and women apply fasting: not fasting Tips: Nocturnal urine from 8 pm to 8 am. Normal value Reference value 24 hours urine volume is 1000 ~ 2000ml, the ratio of urine volume to nocturia is 3 ~ 4:1, nocturia <750ml, the highest proportion of urine is above 1.020, the difference between the highest specific gravity and the lowest specific gravity, no Should be less than 0.009. Clinical significance When chronic nephritis involves the renal medulla, there may be concentrated dysfunction, increased urine output, often above 2500ml/24h, the highest specific gravity of urine is less than 1.018, the difference between the highest and lowest specific gravity is less than 0.009, and the urine specific gravity is fixed at 1.010 in the late course of the disease. Renal tubular reabsorption is poor. In chronic pyelonephritis, renal tubular damage is heavier than glomerular, nocturia is increased, urine specific gravity is reduced, and the late specific gravity is lower and fixed. In addition, from hypertension to decompensation of renal function, there are also tubular dysfunction, with nocturia and a decrease in specific gravity. Precautions Normal consumption during the test, the water content of each meal should not exceed 500 ~ 600ml, no more liquid except the normal meal, urinating at 8 o'clock in the morning, from 10 am, 12 am, 2, 4, 6, 8 pm and At 8 o'clock in the morning, each urine was given 1 time. The urine volume and specific gravity were accurately measured. It should be noted that the interval between urination must be accurate and the urine should be drained. Nocturnal urine is from 8 pm to 8 am. Inspection process When the subject is restricted to drinking water, the plasma crystal osmotic pressure is increased, stimulating the hypothalamic osmotic receptor, increasing the secretion and release of vasopressin, increasing the absorption of water, reducing the amount of urine, and discharging a certain concentration of concentrated urine. If the kidney function is abnormal, the concentration of urine will decrease, and a certain concentration of urine will not be discharged. Not suitable for the crowd no. Adverse reactions and risks no.

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