What is a C1 inhibitor blood test?

The test checks the level of a substance called C1 esterase inhibitor in your blood. This substance is important in regulating the immune system. A very low level of C1 esterase inhibitor would suggest you have an inherited problem affecting how much of this substance your body is able to produce.

Is there a blood test for angioedema?

Hereditary Angioedema A genetic test and a blood test can identify this condition. It is more common to have the blood test. Screening Test: A blood test that measures C4 levels may be used as a screening blood test for hereditary angioedema.

What is deficiency of C1 inhibitor?

Acquired angioedema due to C1-inhibitor (C1-INH) deficiency (AAE-C1-INH) is a serious condition that may result in life-threatening asphyxiation due to laryngeal edema. It is associated with malignant B-cell lymphoma and other disorders.

What causes elevated C1 esterase inhibitor?

hereditary or acquired angioedema. SLE. kidney diseases, such as lupus nephritis, glomerulonephritis, or membranous nephritis. septicemia, which is also known as blood infection.

What is esterase inhibitor used for?

C1 esterase inhibitor is used to treat or prevent hereditary angioedema (HAE). HAE is a rare disease that causes swelling of the face, hands, feet, throat, stomach, bowels, or genitals. People who have HAE have low levels of C1 esterase inhibitor in their body.

Where are C1 esterase inhibitors?

Complement C1 esterase inhibitor is made from donated human plasma and may contain viruses or other infectious agents.

What kind of doctor do you see for angioedema?

Hereditary Angioedema Doctor: Building Your Care Team. Hereditary angioedema (HAE) is a rare genetic disorder that causes swelling in the face, throat, gastrointestinal tract, and other parts of your body. Your healthcare team should feature a doctor who has treated HAE, usually an allergist-immunologist.

How is C1 esterase deficiency diagnosed?

HAE is diagnosed by the finding of low C1 esterase inhibitor level or function….Present with:

1. Stridor or respiratory distress due to laryngeal oedema.
2. Other signs of potential airway compromise eg hoarse voice, persistent cough, dysphagia or tongue swelling.
3. Severe abdominal pain or vomiting.

What deficiency causes angioedema?

Hereditary angioedema and acquired angioedema (acquired C1 inhibitor deficiency) are caused by deficiency or dysfunction of complement 1 (C1) inhibitor, a protein involved in the regulation of the classical and lectin complement activation pathways.

What are the symptoms of hereditary angioedema?

Some symptoms of hereditary angioedema include:

• Swelling of the skin (most common symptom)
• Swelling of the hands and feet.
• Fatigue.
• Headache.
• Muscle aches.
• Skin tingling.
• Abdominal pain (sometimes severe)
• Nausea and vomiting.