Bilirubin - urine

定义

Bilirubin is a yellowish pigment found in 胆汁, which is a fluid produced by the liver and stored 在 gallbladder.

This article is about a lab test to measure the amount of bilirubin 在 urine. Large amounts of bilirubin 在 body can lead to jaundice.

Bilirubin may also be measured with a blood test.

Alternative Names

Conjugated bilirubin - urine; Direct bilirubin - urine

How the Test is Performed

This test can be done on any urine sample.

For an infant, thoroughly wash the area where urine exits the body.

• Open a urine collection bag (a plastic bag with an adhesive paper on one end).
• For males, place the entire penis 在 bag and attach the adhesive to the skin.
• For females, place the bag over the labia.
• Diaper as usual over the secured bag.

This procedure may take a few tries. An active baby can move the bag, causing urine to go into the diaper.

Check the infant often and change the bag after the infant has urinated into it. Dra在 urine from the bag into the container provided by your health care provider.

Deliver the sample to the laboratory or to your provider as soon as possible.

How to Prepare for the Test

Many medicines can interfere with blood test results.

• Your provider will tell you if you need to stop taking any medicines before you have this test.
• Do not stop or change your medicines without first talking to your provider.

How the Test will Feel

The test involves only normal urination, and there is no discomfort.

Why the Test is Performed

This test may be done to diagnose liver 或胆囊 problems.

正常的结果

Bilirubin is not normally found 在 urine.

What Abnormal Results Mean

Increased levels of bilirubin 在 urine may be due to:

• Biliary tract disease
• 肝硬化
• 胆结石 在 胆道
• 肝炎
• 肝脏疾病
• Tumors of the liver 或胆囊

注意事项

Bilirubin can break down in light. That is why babies with jaundice are sometimes placed under blue fluorescent lamps.

参考文献

迪恩·AJ，李·DC. Bedside laboratory and microbiologic procedures. In: Roberts JR, Custalow CB, Thomsen TW, eds. Roberts and Hedges' Clinical Procedures in Emergency Medicine and Acute Care. 7日艾德. Philadelphia, PA: Elsevier; 2019:chap 67.

Korenblat KM, Berk PD. Approach to the patient with jaundice or abnormal liver test results. In: Goldman L, Schafer AI, eds. Goldman-Cecil Medicine. 26日艾德. Philadelphia, PA: Elsevier; 2020:chap 138.

Riley RS, McPherson RA. Basic examination of urine. In: McPherson RA, Pincus MR, eds. Henry's Clinical Diagnosis and Management by Laboratory Methods. 24日艾德. Philadelphia, PA: Elsevier; 2022:chap 29.