Is occult blood in urine routine test 20 serious?

Urinalysis occult blood 20 is actually a kind of urine occult blood phenomenon that will appear on the report when doing a routine urine test. After getting this result, patients will be more nervous or worried, but in fact, the false positive rate is sometimes relatively high. Therefore, we must pay attention to scientific knowledge and understanding of urine routine occult blood. If it is indeed caused by some diseases, then we must focus on scientific treatment.

1. Diagnosis

In the outpatient clinic, female patients often come with physical examination reports, saying that they have blood in their urine and are quite nervous. When we carefully review the reports, we find that there is only urine occult blood +--+++, and some show urine red blood cells 0-3/hp, where /hp represents the number of red blood cells per high-power field of view under the microscope. At this time, it does not mean hematuria in the true sense. The diagnosis of hematuria must be based on microscopic examination of the urine sediment. Microscopic examination of the urine sediment showing >3 red blood cells/high-power field of view can diagnose hematuria. Hematuria cannot be diagnosed based solely on red urine or positive occult blood in urine routine. The urine test strip method for determining occult blood is affected by many factors and has a high false positive rate. Therefore, if you see positive urine occult blood, don't panic. First, check whether there is urine sediment microscopy. If not, you can go to a nearby hospital for a complete examination.

2. In addition to hematuria, what other conditions may cause red urine?

Certain foods (such as beets, purple pitaya, carrots, tomato leaves, etc.) and certain drugs and their metabolites (such as rhubarb, rifampicin, phenytoin sodium, phenolphthalein, etc.) can cause red urine.

3. What are the precautions for retaining urine when checking for hematuria?

First of all, women should avoid the menstrual period. Secondly, when the doctor issues a urine routine test and urine difference test order, it is necessary to ensure that the urine is fresh and not overly diluted, that is, it should be sent for testing within half an hour after collection, and do not drink too much water before collecting urine.

4. What are the common causes of hematuria?

Various acute and chronic nephritis - red blood cells in urine are often deformed and uneven in shape

Urinary tract infection - white blood cells are present in the urine, often accompanied by frequent urination, urgency, pain when urinating or back pain, fever, etc.

Urinary tract stones - may cause sudden back pain, radiating to the thigh and perineum, and require complete B-ultrasound or CT examination

Urinary tract cancer - Painless gross hematuria in patients over 40 years of age should be screened for urinary tract cancer, including urine pathology and imaging studies

Vigorous exercise - urine repeatedly impacts the bladder wall, causing damage and bleeding. No treatment is required and it usually recovers on its own within 3-7 days.

Peach-cracker phenomenon is more common in adolescents with a slender body shape. It is caused by compression of the left renal vein. The prognosis is good and can be confirmed by B-ultrasound.