Urine ferric chloride test

The urinary ferric chloride test is an auxiliary test used to check if urine is normal. Phenylketonurics (PKU) is a common amino acid metabolic disease caused by an enzyme deficiency in the phenylalanine metabolic pathway, which prevents phenylalanine from being converted to tyrosine, resulting in phenylalanine and its Ketoacid accumulates and is excreted in large quantities from the urine. The main clinical manifestations are mental retardation, seizures and hypopigmentation. Commonly used urine ferric chloride test to check whether phenylalanine is normal. Through this examination, the corresponding symptoms can be judged. Basic Information Specialist classification: urinary examination classification: urine / kidney function test Applicable gender: whether men and women apply fasting: fasting Analysis results: Below normal: Normal value: no Above normal: negative: normal. Positive: The patient's urine was positively reacted with ferric chloride and was purple-black. Abnormal phenylalanine may have phenylketonuria. Tips: Do not eat after 9:00 pm the day before the test. Drink water. Check the morning after getting up and do not eat or drink water, which is convenient for inspection. Normal value The test was negative. Clinical significance Abnormal results: The patient's urine was positively reacted with ferric chloride and was purple-black. Abnormal phenylalanine may have phenylketonuria. People who need to be examined: those with abnormal urine. Precautions Taboo before the test: Do not eat after 9:00 pm the day before the test. Drink water. Check the morning after getting up and do not eat or drink water, which is convenient for inspection. Requirements for inspection: The doctor patiently operates and checks carefully. Inspection process The ferric chloride is dripped into the urine, and if it is immediately green, it is positive, indicating that the concentration of phenylalanine in the urine is increased. In addition, the dinitrophenylhydrazine test can also measure phenylalanine in urine, and the yellow precipitate is positive. Not suitable for the crowd Inappropriate people: Generally, there is no suitable for the crowd. Adverse reactions and risks No obvious complications and harms.