铟标记WBC扫描

定义

A radioactive scan detects 脓肿es or infections in the body by using a radioactive material. An 脓肿 occurs when pus collects due to an infection.

选择的名字

Radioactive 脓肿 scan; Abscess scan; Indium scan; Indium-labeled white blood cell scan; WBC scan

如何执行测试

Blood is drawn from a vein, most often on the inside of the elbow or the back of the hand.

• The site is cleaned with germ-killing medicine (antiseptic).
• The health care provider wraps an elastic band around the upper arm to apply pressure to the area and make the vein swell with blood.
• Next, the provider gently inserts a needle into the vein. The blood collects into an airtight vial or tube attached to the needle.
• The elastic band is removed from your arm.
• The puncture site is covered to stop any bleeding.

The blood sample is then sent to a lab. There the white blood cells are tagged with a radioactive substance (放射性同位素称为铟. The cells are then injected back into a vein through another needle stick.

You will need to return to the office 6 to 24 hours later. At that time, you will have a 核扫描 to see if white blood cells have gathered in areas of your body where they would normally not be located.

如何准备考试

Most of the time you do not need special preparation. You will need to sign a consent form.

For the test, you will need to wear a hospital gown or loose clothing. You will need to take off all jewelry.

Tell your provider if you are pregnant. This procedure is NOT recommended if you are pregnant or trying to become pregnant. Women of childbearing age (before menopause) should use some form of birth control after this procedure.

Tell your provider if you have or had any of the following medical conditions, 程序, 或治疗, as they can interfere with test results:

• 镓扫描 在过去一个月内
• 血液透析
• 高血糖
• 长期抗生素治疗
• 类固醇治疗
• Total parenteral nutrition (through an IV)

考试的感觉如何

Some people feel a little pain when the needle is inserted to draw blood. Others feel only a prick or sting. Afterward, there may be some throbbing.

The nuclear medicine scan is painless. It may be a little uncomfortable to lie flat and still on the scanning table. This most often takes about an hour.

为什么要进行测试

这种测试现在很少使用了. In some cases, it may be helpful when doctors cannot localize an infection. The most common reason it is used is to look for a bone infection called osteomyelitis.

It is also used to look for an 脓肿 that may form after surgery or on its own. Symptoms of an 脓肿 depend on where it is found, but may include:

• Fever that has lasted a few weeks without an explanation
• 感觉不舒服(不适)
• 疼痛

Other imaging tests such as an 超声波 or CT扫描 通常是先做的.

正常的结果

Normal findings would show no abnormal gathering of white blood cells.

异常结果意味着什么

A gathering of white blood cells outside of the normal areas is a sign of either an 脓肿 or other type of inflammatory process.

Abnormal results may include:

• 骨感染
• 腹腔脓肿
• 肛门直肠的脓肿
• 硬膜外脓肿
• 扁桃体周脓肿
• 化脓性肝脓肿
• 皮肤脓肿
• 牙脓肿

风险

The risks of this test include:

• Some bruising may occur at the site of injection.
• There is always a slight chance of infection when the skin is broken.
• There is low-level radiation exposure.

The test is controlled so that you get only the smallest amount of radiation exposure needed to produce the image.

Pregnant women and children are more sensitive to the risks of radiation.

参考文献

Chacko AK, Shah RB. 应急核辐射学. 见:Soto JA, Lucey BC，编. Emergency Radiology: The Requisites. 第二版. Philadelphia, PA: Elsevier; 2017:chap 12.

克利夫兰KB. General principles of infection. In: Azar FM, Beaty JH, Canale ST, eds. Campbell's Operative Orthopaedics. 14日艾德. Philadelphia, PA: Elsevier; 2021:chap 20.

马特森EL，奥斯蒙博士. Infections of bursae, joints, and bones. In: Goldman L, Schafer AI, eds. Goldman-Cecil医学. 26日艾德. Philadelphia, PA: Elsevier; 2020:chap 256.