Does nephrotic syndrome require a puncture?

Written by Niu Yan Lin

Nephrology

Updated on September 27, 2024

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Nephrotic syndrome is a complex of clinical symptoms with various causes, which differ by age group. In children or adolescents, if it presents solely as significant proteinuria without elevated creatinine or hematuria, it is generally caused by minimal change disease. Since this type of kidney disease is sensitive to hormone treatment, it is usually possible to forego renal biopsy and start with corticosteroid therapy. For other nephrotic syndrome patients, it is advisable to first perform a renal biopsy to identify the pathological cause before considering appropriate treatment with hormones, immunosuppressants, and other medications.

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Written by Zhu Wei

Nephrology

39sec

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What should not be eaten with nephrotic syndrome?

Patients with nephrotic syndrome, if the patient has obvious edema, should limit salt intake to between two to three grams per day. It is suggested to consume foods rich in polyunsaturated fatty acids, such as vegetable oils, as well as foods rich in soluble fiber, such as oats. They should also receive a normal amount of 0.8 to 1 gram of high-quality protein per kilogram of body weight per day, mainly from egg whites, milk, lean meat, and fish. Calorie intake should be sufficient, and patients with nephrotic syndrome should eat less salty and pickled foods and consume less animal fat.

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Written by Zhou Qi

Nephrology

57sec

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Is nephrotic syndrome hereditary?

Nephrotic syndrome is generally not hereditary. It refers to a group of clinical symptoms and manifestations. The fundamental issue in patients is the damage to the glomerular capillaries, which leads to significant proteinuria, subsequently causing edema, hyperlipidemia, and hypoalbuminemia in the plasma. The causes of this disease are classified into primary and secondary types. Primary nephrotic syndrome is related to immune system dysfunction and may involve multiple genes; therefore, the disease is not considered a clear hereditary disease, but the likelihood of offspring developing renal issues may be higher than in the general population. Secondary nephrotic syndrome is mostly related to factors such as hepatitis B infection, allergies, diabetes, etc., and these diseases are not hereditary either.

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Written by Zhou Qi

Nephrology

1min 6sec

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Characteristics of Nephrotic Syndrome

The characteristic feature of nephrotic syndrome is that patients may experience edema, which is related to the nature of this disease. The essence of this disease is due to some reason that damages the glomerular capillary filtration barrier. As a result, when blood passes through the glomeruli, it leaks proteins from the blood. A 24-hour urinary protein quantification will exceed 3.5 grams, which constitutes a large amount of urinary protein. Consequently, a large amount of protein is leaked into the urine, causing the protein concentration in the plasma to decrease. This leads to a reduction in the colloidal osmotic pressure of the plasma, causing fluid to move from inside the blood vessels to outside, thus leading to edema. Therefore, the most significant clinical feature of nephrotic syndrome is the potential to cause edema, and severe cases of edema may elevate blood pressure, lead to pulmonary edema, manifesting as difficulty breathing, chest tightness, and shortness of breath.

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Written by Zhou Qi

Nephrology

53sec

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Causes of edema in nephrotic syndrome

Edema is a diagnostic criterion for nephrotic syndrome, as well as a major clinical symptom and characteristic of the syndrome. There are several reasons why patients develop edema. First, a large amount of protein leaks out from the kidneys, causing a decrease in the concentration of plasma albumin and a decrease in the colloid osmotic pressure in the plasma, which makes it easy for water to move from inside the blood vessels to outside, causing edema. Second, patients with nephrotic syndrome have increased vascular permeability, which also makes it easy for water to enter the interstitial tissues. Among patients with nephrotic syndrome, some are prone to acute renal failure, which further decreases the kidney's ability to excrete water, and these factors together lead to the common occurrence of edema in patients.

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Written by Zhou Qi

Nephrology

39sec

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How is nephrotic syndrome diagnosed?

Nephrotic syndrome is a general term for a group of clinical symptoms. Its primary diagnostic criteria include a 24-hour urine protein quantification of greater than or equal to 3.5 grams and plasma albumin less than or equal to 30 grams per liter; these two criteria are essential for the diagnosis of nephrotic syndrome. Meeting these criteria is sufficient for the diagnosis. There are also two additional supporting diagnostic criteria for nephrotic syndrome, which include possible symptoms of edema and hyperlipidemia. These four elements are the main clinical manifestations and diagnostic criteria of nephrotic syndrome.