Why is proteinuria positive?

summary

Why is proteinuria positive? Positive urine protein refers to urine routine examination or 24-hour urine protein quantitative test results show "+". Let's take a look at the reasons why urine protein is positive.

Why is proteinuria positive?

Reason 1: weak positive glomerular proteinuria: glomerular capillary wall damage caused by various reasons (such as immune damage), so that the load is reduced or lost, resulting in increased glomerular permeability. After filtration, more plasma proteins exceed the reabsorption capacity of renal tubules, resulting in urinary protein. Such as acute and chronic nephritis, lupus nephropathy, diabetic nephropathy, etc.

Reason 2: weak positive of renal tubular urine protein: when renal tubular lesions or renal tubular functional defects occur, protein reabsorption decreases or secreted protein increases, resulting in increased urine protein. Such as renal tubular acidosis, nephrosis caused by analgesics, nephrotoxicity of antibiotics and so on.

Reason 3: overflow urine protein weakly positive (also known as coagulative proteinuria): the patient's urine is turbid when heated to 40 ℃ and coagulated when heated to 60 ℃, reaching 100 ℃  It dissolves at. It is often found in myeloma, primary amyloidosis and macroglobulinemia.

matters needing attention

1. The dietary amount of albuminuria can be supplied according to the normal demand, which is 0.8 ~ 1.0g/kg per day for adults. Protein with high physiological value should be selected, such as egg, milk, fish, lean meat, etc. 2. In addition to the loss of a large amount of protein in urine, nephrotic syndrome patients who also lose minerals such as calcium, magnesium and zinc bound to protein should eat more fresh vegetables and fruits and supplement foods rich in calcium,