Erebuni Medical Center

What is Computed Tomography Angiography (CTA)?

Computed tomography angiography (CTA) is a diagnostic procedure used to examine the abdominal cavity and small pelvic organs, typically performed with the injection of a contrast agent. Before the procedure, patients are required to undergo a biochemical blood test to determine creatinine levels. High creatinine levels indicate that CTA is contraindicated.

If the creatinine levels are within the normal range, a contrast agent will be administered intravenously before the procedure, allowing for sharper and more detailed images. The contrast material is expelled from the body within 24 hours. The last meal should be consumed 2-3 hours before the examination.

Contraindications for Computed Tomography (CT)

There are no absolute contraindications for CT scans, but the use of contrast agents introduces some relative contraindications, including:

• Allergic diseases, especially bronchial asthma
• Allergy to iodine
• Renal failure
• Pregnancy
• Hyperthyroidism

How is a CT Examination Performed?

During the procedure, the patient remains in a supine position. The duration of the examination ranges from 10 to 30 minutes, depending on the organ being studied.

CT During Pregnancy

CT scans are only recommended during pregnancy if absolutely necessary.

CT of the Gastrointestinal Tract Preparation for a Gastrointestinal CT Scan

• Do not eat for 6 hours prior to the examination.
• Arrive at the medical center 1 hour before the scheduled time.
• Submit recent blood test results (within the last 24 hours) showing creatinine levels.
• You will be asked to drink a special solution before the scan, which may cause diarrhea afterward.

Procedure

• The patient will lie in a supine position during the scan, which takes around 40 minutes.

Use of Contrast Material

• The use of contrast material is contraindicated only in cases of uncompensated hyperthyroidism (high thyroid hormone levels).
• Contrast can be administered if:
  • Thyroid hormone levels are under control
  • Thyroid surgery has been performed

Medication Before the Examination

If there have been allergic reactions to contrast material in the past or if the patient has severe asthma and uses an inhaler, a specific medication regimen will be provided upon registration.

For breastfeeding mothers, it is recommended to stop feeding temporarily. Discuss the timing of the next feeding with a specialist.

In cases where the procedure is covered by state orders or insurance, compensation must be agreed upon with the relevant department in advance, otherwise, the examination will be conducted on a paid basis.