Immunofluorescence

Injury Disease Nutrition Poison Symptoms Surgery Test Special Topic

1 2 5 A B C D E F G H I J K L M N O P Q R S T U V W X

Blood test

Overview Risks Results

Immunofluorescence

Immunofluorescence is a laboratory technique to identify specific antibodies or antigens. Antibody identification is usually performed on blood (serum).

Blood is drawn from a vein, usually from the inside of the elbow or the back of the hand. The puncture site is cleaned with antiseptic. An elastic band is placed around the upper arm to apply pressure and cause the vein to swell with blood.

A needle is inserted into the vein, and the blood is collected in an air-tight vial or a syringe. During the procedure, the band is removed to restore circulation. Once the blood has been collected, the needle is removed, and the puncture site is covered to stop any bleeding.

In infants or young children, the area is cleansed with antiseptic and punctured with a sharp needle or a lancet. The blood may be collected in a pipette (small glass tube), on a slide, onto a test strip, or into a small container. A bandage may be applied to the puncture site if there is any bleeding.

Immunofluorescence is a laboratory technique. The exact technique may vary depending on the specific antibody that is being investigated and between different laboratories.

In general, cells, tissue, or some other substance is placed onto microscope slides. A small amount of sample containing antibodies (typically serum, a liquid portion of blood) is placed over the cells or tissue, allowing the antibodies that are specific for the particular tissue or cellular antigens to bind.

The serum is washed away, and a second antibody that binds to human antibodies (often made in another animal species such as rabbits or goats) is applied to the slide. This second antibody has a fluorescent dye chemically linked to it. If the person's serum has antibodies that bind to the tissue or cells, a bright fluorescence can be seen by use of a special microscope.

No special preparation is necessary.

For infants and children:

The preparation you can provide for this test depends on your child's age and previous experiences. For specific information regarding how you can prepare your child, see the following topics:

• Infant test or procedure preparation (birth to 1 year)
• Toddler test or procedure preparation (1 to 3 years)
• Preschooler test or procedure preparation (3 to 6 years)
• Schoolage test or procedure preparation (6 to 12 years)
• Adolescent test or procedure preparation (12 to 18 years)

When the needle is inserted to draw blood, you may feel moderate pain, or only a prick or stinging sensation. Afterward, there may be some throbbing.

This test is used to detect and roughly measure the amount of antibodies in the blood.

Email this page  Printer friendly  Bookmark this page