How to prepare for a CT Scan? Preparation guidelines

Computed tomography is one of the most frequently performed radiological examinations. The technology it uses allows you to look inside the body, and thus detect irregularities in its functioning. The result of the examination is a three-dimensional image, which consists of many layers of x-ray images. Computed tomography examination requires the patient to prepare before proceeding. So how to prepare for a CT scan?

Computed tomography with and without contrast

In most cases, it is necessary to perform a CT scan with contrast. Contrast is a special agent which improves the visibility of certain body tissues in the image from the examination. Thus, the image is more accurate and legible. Computed tomography with contrast, however, is associated with the possibility of side effects, such as:

• A feeling of warmth and overflow of the bladder;
• Characteristic taste in the mouth;
• Itching;
• Palpitations;
• Dizziness.

These reactions are caused directly by the contrast medium and usually disappear very quickly. However, side effects also can include redness, rash, swelling, vomiting and shortness of breath. If any of the occurring symptoms concern us and persist for a longer time, the medical staff should be informed immediately. In addition, contrast computed tomography requires the patient to set aside an additional 15 minutes for observation.

CT scan instructions:

• The test should be performed on an empty stomach – the last meal should be eaten 6 hours before the test;
• It is recommended to drink about 1 liter of non-carbonated liquids about 2-4 hours before the examination;
• Before the examination, the bladder should be emptied;
• It is necessary to appear in advance to the point where the examination is to be performed – for this purpose, a minimum of 30 minutes must be reserved;
• You should take your previous test results with you;
• People who take medications on a regular basis should also take them on the day of the examination;
• Wear comfortable clothes without metal buckles and buttons;
• Jewelry, glasses, hearing aids and dentures should be removed.

Before performing a computed tomography, you should report:

• Allergic reactions to drugs or contrast agents;
• General allergic reactions;
• Chronic diseases (whether treated or untreated) e.g. thyroid disease, asthma and respiratory disease, cardiovascular disease, renal and hepatic failure;
• Pregnancy or presumption of pregnancy;
• Previous operations and their nature.

Thanks to this information, the medical staff will be prepared for possible side effects, e.g. in the case of providing contrast. In this way, it is possible to avoid complications both during and after the test.

How long does a CT scan take?

The duration of the test largely depends on the size of the scanned area. Computed tomography usually takes from several to several dozen minutes. Both the duration and quality of the image depend on proper preparation and compliance with all recommendations of the patient.

How does the CT scan work?

The patient enters the CT scan fully dressed, but due to the risk of image distortion, all metal elements should be removed. In the first stage, the patient lies down on a special table, which then slowly moves into the tunnel. During the examination, the patient is monitored by medical staff and has the possibility of verbal contact. The patient is also being informed about the next steps throughout the procedure. Most scanners are additionally equipped with an intercom, which makes communication even more efficient, so if you feel unwell, you can report it immediately.

The test itself does not affect the motor skills in any way, so it is possible to drive vehicles. The situation is different for people who have been given general anesthesia or given sedatives.