Introduction to urea nitrogen determination

Urea nitrogen measurement is an important medical examination that can help doctors evaluate a patient's kidney function. In clinical practice, the determination of urea nitrogen is often used in the diagnosis and treatment of kidney disease patients.

When conducting urea nitrogen measurements, doctors usually require patients to perform on an empty stomach, which can reduce the impact of food on the measurement results. Before testing, patients need to avoid a high protein diet because protein is metabolized by the kidneys into urea nitrogen, which affects the results of the test.

There are two methods for measuring urea nitrogen: blood urea nitrogen and urine urea nitrogen. Blood urea nitrogen is measured by extracting venous blood to determine the level of urea nitrogen in the blood, while urea nitrogen is measured by collecting urine from patients.

In the determination of blood urea nitrogen, doctors usually use automated biochemical analyzers for measurement. The results of the measurement can help doctors determine whether the patient's kidney function is normal. If the blood urea nitrogen level increases, it may indicate that the patient's renal function is impaired.

In addition to blood urea nitrogen measurement, urine urea nitrogen measurement is also a common examination method. Urinary nitrogen levels are influenced by various factors such as diet, exercise, and medication, so their measurement results are only for reference. If the level of urinary nitrogen increases significantly, it may indicate that the patient has kidney disease or other kidney problems.

In summary, urea nitrogen measurement is an important medical examination method that can help doctors evaluate whether a patient's kidney function is normal. In clinical practice, the determination of blood urea nitrogen and urine urea nitrogen is a common examination method, but it is necessary to pay attention to their influencing factors and scope of use. If a patient's renal function is abnormal, timely urea nitrogen measurement can help doctors develop corresponding treatment plans.