Human urine pH range

When conducting a routine urine test, there are many things to check, and one of the values ​​is very important, that is the pH value of urine. The pH value of healthy urine is relatively stable. Once it exceeds this range, it means that there are certain problems with the urine, indicating certain disease problems, etc. Through such values, we can make a basic judgment. Let us briefly understand the pH value range of human urine.

pH range of human urine

1. What is the pH value of urine routine?

PH value refers to the acidity and alkalinity of the human body. Human body fluids, like any other liquids, have acidity and alkalinity. PH is the abbreviation of "potential hydrogen", which indicates the concentration of hydrogen in the human body. The pH value is expressed as a number from 0 to 14. The smaller the number, the stronger the acidity. 7 is neutral, and numbers greater than 7 are alkaline. The larger the number, the greater the alkalinity.

The pH value of urine routine examination is the acidity and alkalinity of urine during urine routine examination. Because pH is the code for the acidity or alkalinity of a solution in chemistry. Normal urine is slightly acidic, but can also be neutral or slightly alkaline. The acidity or alkalinity of urine depends largely on the type of diet, medications taken, and the type of disease.

2. What is the normal range of urine pH value?

The pH value of urine reflects the acidity or alkalinity of urine. PH<7 is acidic, PH>7 is alkaline. The normal pH value of urine test is 5.0~8.0. The average is 6.0, which means that normal urine is slightly acidic.

Acidic urine is common in nephritis and renal tuberculosis, and alkaline urine can be seen in type I renal tubular alkali poisoning. In the first few days after birth, the urine of a newborn baby is highly acidic due to the high content of urate. Later, it becomes close to neutral or weakly acidic, with a pH of 5 to 7.

3. Clinical significance of urine pH value:

The measurement of this indicator can be used to understand the body's acid-base balance and electrolyte balance, and is an important indicator for the clinical diagnosis of respiratory or metabolic acid/base poisoning. Urine acid-base determination often has no obvious clinical significance when used independently. It is generally used in combination with other items to comprehensively judge changes in the patient's condition and for monitoring.

According to clinical experience, urine pH is affected by food intake, the body's alkaline state after meals, physiological activities and drugs. After eating protein-rich foods and other meat dishes, urine becomes acidic; eating more fruits and vegetables will cause urine to become alkaline. After meals, urine becomes acidic due to the influence of gastric acid secretion.

Increased uric acid alkalinity (PH) is seen in metabolic acidosis or renal tubular acidosis.

A decrease in uric acid alkalinity (PH) is seen in acidosis, gout, hypokalemia, and diabetic ketoacidosis. In addition to the above reasons, taking acidic drugs such as vitamin C can also lead to a decrease in uric acid alkalinity.