Xylose determination

Xylose is determined by measuring the concentration of D-xylose in blood and urine after oral administration of a certain amount of D-xylose to evaluate the absorption capacity of the small intestine and to infer kidney function. Subjects fasted after eating the night before, and the urine was drained first on the morning of the test. 2 ml of venous blood was taken to measure the basal blood glucose as a control. Then 5 g of Xylose was dissolved in 250 ml of water. Basic Information Specialist classification: urinary examination classification: blood examination Applicable gender: whether men and women apply fasting: fasting Tips: The subjects fasted after eating the night before, and the urine was drained first on the morning of the test. Normal value Colorimetric blood 0.65-1.33 mmol/L (5 g dose method). Clinical significance Abnormal result The test is positive, and the xylose is discharged below 25%, suggesting abnormal renal function, which can be examined in detail. Sprue short bowel syndrome has a low value due to poor absorption due to reduced absorption area. The results of dyspepsia caused by pancreas, liver and biliary diseases are normal. The discharge can also be reduced in blind sputum syndrome. Before the administration of the drug and 2 hours after taking the drug, the blood glucose level of each blood was measured. If the urine glucose output decreased, but the blood concentration was normal, that is, "high blood and low urine phenomenon", it indicates renal insufficiency. People who need to be checked People with edema, increased foam in the urine, hematuria, pain in the lower back, and symptoms of high blood pressure. Low results may be diseases: high renal insufficiency may result in diseases: precautions for dyslipidemia in children Contraindications before the examination: The subjects fasted after eating the meal the night before, and the urine was drained first on the test day. Requirements for inspection: Relax when taking urine. 2 ml of venous blood was taken to measure the basal blood glucose as a control. Then 5 g of Xylose was dissolved in 250 ml of water. Inspection process All urine should be collected within 5 hours after the collection, and if necessary, water can be replenished during this period to ensure sufficient urine volume. The last urination should try to empty the bladder. After diluting all the collected urine with water to 1000ml, take 0.1ml and dilute it 1:10. Take 3 tubes and add 1 ml of diluted urine, 1 ml of xylose standard solution and 1 ml of double distilled water (blank tube). Each tube was added with 5 ml of p-bromoaniline reagent, and then heated in a 70 ° C water bath for 10 min, and then placed in a dark place at room temperature for 90 min. At that time, the color point is adjusted by using a blank tube at 545 nm. The xylose excretion and excretion rate in the urine 5 hours after oral administration of xylose were calculated. Not suitable for the crowd No taboos. Adverse reactions and risks No complications.