What is leukocytouria? Why are there always white blood cells in the urine

Normally, urine is sterile, but around the urethral opening and under 1 3 of the urethra is bacterial. As a result, urine excreted from the body can become contaminated with some bacteria. However, the amount of bacteria in the clean midstream urine should not exceed 105 ml.

If the bacterial content is greater than or equal to 105 ml in two consecutive laboratory tests, and the bacteria are of the same species, and there are no symptoms of urinary tract infection (urinary frequency, urgency, or lower abdominal discomfort, etc.), the diagnosis of true bacteriuria, also known as asymptomatic bacteriuria.

Casts in urine: casts are an important component of urine sediment, and the presence of casts in urine often indicates renal parenchymal damage. Increased casts in the urine are called casts, and the presence of casts often indicates parenchymal renal damage.

Cast-type urine is a cylindrical structure formed by the coagulation of protein in the urine in the renal tubules and collecting ducts, and proteinuria is necessary for the formation of casts, and the matrix for the formation of the casts is T-H glycoprotein. In pathological cases, due to the increased permeability of the glomerular basement membrane, a large number of proteins enter the renal tubules from the glomeruli, and in the distal convoluted tubules and collecting ducts of the kidney, due to concentration (water absorption) acidification (increased acidity) and the presence of chondroitin sulfate, the proteins condense and precipitate in the lumen of the renal tubules, forming casts.

Cloudy urine: This is when the urine is opaque. Normally, the newly excreted urine is mostly clear, and a trace of flocculent precipitate may appear after placement, and the fresh urine is cloudy, which can be seen in:

Urate precipitation: After the concentrated acidic urine is cooled, there can be a reddish urate precipitation, and this precipitation can be dissolved when heated or alkalinized.

Phosphate and carbonate precipitation: concentrated alkaline or neutral urine is excreted from the body, phosphate or carbonate precipitation can be white, acid can be dissolved, carbonate precipitation can also be gas bubbles when acidified.

Pyuuria or bacteriuria: If the urine contains a large amount of inflammatory exudates such as white blood cells, pus cells, and bacteria, it may be cloudy when it is just discharged. The bacteriuria is cloud-like and does not sink after standing; After pyuri is placed, there may be a white cloud flocculent precipitate. This kind of urine does not go away regardless of heating or acidification.

If the urine contains more white blood cells and/or pus, it is called leukocytouria, also known as pyuria. Pus cells are white blood cells that have degenerated and died. If there are a small number of white blood cells in the urine, it can only be detected under the microscope, and when there is a large amount of pyuria, the urine can be seen to be cloudy or even milky white with the naked eye.

The types of leukocytes in the urine mainly include neutrophil polymorphic leukocytes, eosinophils and lymphocytes, and the clinical significance of different types of leukocytes in urine is different.

The number of white blood cells in the urine is also affected by a variety of factors, including:1urine pH, when urine pH rises, white blood cells are easily destroyed; 2.

Urine output, large amounts of water to reduce urine osmolality, destruction of white blood cells, and decrease of urine white blood cell count; 3.Urine specimen placement, the longer time of urine specimen placement, also destroys the urine leukocyte and reduces the number.

If you want to check the white blood cells that appear in the urinalysis, this one will see if there are any uncomfortable symptoms, such as frequent urination and urgency, incomplete urination, etc., or check it and go to Anyang Tongji to have a look.

Leukocytosis, mainly seen in urinary tract inflammation, such as pyelonephritis, cystitis, urethritis, vesiculitis, prostatitis, etc. In addition, it is also seen in renal tuberculosis, kidney tumors, etc.

Urinalysis leukocytes are the white blood cells of the three types of cells that are tested in urinalysis. In normal urine, there may be a small number of white blood cells, and the general centrifugal urine is 1 2 white blood cells per high power field (HP), which is still normal.

If there are more than 5 white blood cells per high-power field, it is called microscopic pyuria. Microscopic pyuria indicates purulent inflammation of the urethra, such as pyelonephritis, bladder or urethritis, renal tuberculosis, etc.; In glomerulonephritis, there may also be a mild increase in urinary leukocytes.