Urinary occult blood (BLD)

Urine occult blood refers to hemoglobin and myoglobin in the urine, not red blood cells; under normal circumstances, hemoglobin in plasma binds to globin, has a large molecular weight, cannot be filtered from glomerular filtration membrane, and has no hemoglobinuria. The main reason for the occurrence of hemoglobinuria is intravascular hemolysis, that is, a large number of red blood cells in the blood vessel are destroyed, free hemoglobin is released, excessive free hemoglobin exceeds the binding ability of globin, and hemoglobinuria is discharged from the kidney, and urine is severe when it is severe. Sauce color. Followed by hemolysis in the urinary tract, that is, when the urine is stored in the bladder, there are red blood cells, but the urine hemorrhage is positive because the urine specific gravity is too low or the alkali is destroyed to release the hemoglobin. Myoglobinuria is caused by the destruction of muscle tissue from various causes (denaturation, inflammation, extensive trauma and metabolic disorders) and discharge from the urine. Myoglobin has a small molecular weight and can be filtered from the glomerular filtration membrane. Basic Information Specialist classification: urinary examination classification: urine / kidney function test Applicable gender: whether men and women apply fasting: not fasting Analysis results: Below normal: Normal value: no Above normal: negative: normal. Positive: Found in various kidney diseases caused by hematuria, myoglobinuria, paroxysmal nocturnal hemoglobinuria, autoimmune hemolytic anemia, bladder stones and inflammation, blood group incompatibility hemolytic reaction, trauma and so on. Tips: Fresh morning urine should be used as much as possible. The urine that is randomly selected is preferably mid-stage urine. Women should avoid menstruation when taking urine specimens and should prevent vaginal secretions from mixing into the urine. Normal value negative. Recorded as (-). Clinical significance Positive in various kidney diseases caused by hematuria, myoglobinuria, paroxysmal nocturnal hemoglobinuria, autoimmune hemolytic anemia, bladder stones and inflammation, blood group incompatibility hemolytic reaction, trauma and so on. Positive results may be diseases: bladder stones, children with paroxysmal nocturnal hemoglobinuria Note when checking: 1. Try to use fresh morning urine when doing this test. The urine that is randomly selected is preferably mid-stage urine. 2, women should avoid the menstrual period when taking urine specimens, should prevent vaginal secretions mixed into the urine, middle-stage urine is appropriate. 3. Use a clean and dry container for urine. It is better to use disposable urine cups and urine tubes provided by the hospital. The amount of urine used for routine testing should be about 10 ml and sent for inspection as soon as possible. Inspection process Inspection method: urine test. Not suitable for the crowd Menstrual women. Adverse reactions and risks no.

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