Occult blood weakly positive

Weakly positive urine occult blood means that when people do a urine test, the urine test result is between positive and negative. There are many reasons for the weakly positive urine occult blood, the most common ones are pathological and physiological reasons. If it is a physiological reason, it will not cause much harm to the patient's body, but if it is due to pathological reasons, it may be a sign of certain kidney diseases.

When you go to the hospital for a urine test after strenuous exercise, occult blood may appear weakly positive due to extreme dehydration. This usually does not endanger your health and will be fine after a rest. However, if it is due to kidney problems or urinary system problems, it should be discovered and treated in time.

What is the cause of weak positive urine occult blood?

Weak positive urine occult blood is mainly achieved by detecting hemoglobin in urine, thereby discovering one's own disease and actively receiving treatment. If the urine is positive for occult blood and contains protein, kidney disease and hemorrhagic disease should be considered first, and further renal function tests can be done. If the urine protein is negative, you should go to a relevant specialist to find out the site and nature of the bleeding.

It is generally believed that occult blood may not be obvious in lower urinary tract bleeding because red blood cells are not destroyed. A positive urine occult blood test reflects hemoglobin and myoglobin, and the urine contains a large number of red blood cells, which is called hematuria.

Normal human urine contains no red blood cells, or occasionally contains trace amounts of red blood cells (0 to 2 per high-power field of view). After strenuous exercise, heavy physical labor or standing for a long time, transient trace amounts of red blood cells may appear in the urine. This is normal and has no clinical significance. However, if a large number of red blood cells often appear in the urine, it indicates an abnormality, and if the urine occult blood is weakly positive, it should be closely examined.

Inspection method:

① Fresh morning urine without sediment can be directly used for smear examination, with >1 red blood cell in every 2 to 3 high-power fields.

② Microscopic examination of urine sediment: >3 red blood cells per high-power field; or red blood cell count using a cowbag Fahrenheit disc >8000/ml, or urine red blood cell excretion rate >100,000/hour.

③12-hour urine sediment red blood cell count (Addis count)>500,000.

After reading the above introduction, you should know why occult blood is weakly positive. When a patient finds that the result of a urine test is weakly positive, he must find out the reason. If it is pathological, he must do a comprehensive physical examination in time and then seek medical treatment in time. Because the longer the time is delayed, the greater the damage to the kidneys, so it must be discovered and treated in time.