PREPARATION FOR THE OGTT

The test is performed in the morning after at least 8 hours of fasting.

Screening conditions

• 3 days before the examination, eat a normal diet as you are used to and without
  carbohydrate and sugar restrictions.
• Skip alcoholic beverages, including beer, at least 24 hours before the examination.
• Come on with an empty stomach, ie do not eat anything at least 8 hours before the test.
• Drink only unsweetened liquids (ie unsweetened tea, non-flavored mineral water or clean water).
• Do not smoke before or during the examination (the same intervals apply as for fasting).
• We recommend that you rule out increased physical exertion 24 hours in advance.
• Medications: In agreement with the attending physician, omit medicines that can be omitted in the morning on the day of the test; You can take regularly used anti-insulin drugs (eg corticoids, thyroxine, progesterone, beta-sympathomimetics) on the day of the test until it is completed.
• We do not perform oGTT examinations after the night shift, in acute febrile illness and in diarrheal diseases (the reason for postponing the test may be eg acute virosis with fevers), further examination cannot be performed within 6 weeks after surgery or other more serious illnesses (eg heart attack, stroke) , hospitalization, etc.)
• The test cannot be performed if you have nausea during pregnancy (hyperemesis gravidarum).
• Arrive at the collection room at the given time, take your examination request ("žádanka"), health insurance card and ID card with you.
• Due to the fact that this is a stress test, it cannot be started without the indication of a doctor (request).
• If you have epilepsy, it is recommended to choose an alternative examination procedure in agreement with your doctor to prevent possible complications.

You can get answers to any questions regarding the test at our client center at 800 73 73 83.

How does the test work?

The examination consists of taking blood from an elbow vein on an empty stomach.

This is followed by a daily dose of sugar (75 g of glucose), which you drink as a sweet flavored drink in 5 to 10 minutes in an amount of 250 ml.

It is necessary to keep calm during the examination (you will remain sitting or lying down - you will not walk), do not smoke, do not eat. At this time, a maximum of 250 ml of water can be drunk. It is not  ossible to leave the collection point (approx. 3 hours).

A relaxation place is reserved for you at the collection point. You can bring a book or a magazine.

The second and third venous blood samples follow 1 and 2 hours after drinking the drink. This completes the examination. Blood glucose (blood sugar) levels will be determined in blood samples.
The test should not be performed if the fasting blood glucose level during pregnancy is equal to or greater than 5.1 mmol / l.

Warning of possible risks

A drink that serves as a load dose is an osmotically active substance and can rarely cause health problems. In case of any health problems (nausea, vomiting, fainting, weakness), inform the medical staff immediately.

If you do not tolerate blood collection, please inform the medical staff in advance.

It is advisable to bring a snack, which you will eat after the test.

If you are allergic to disinfectants, please report this information to the medical staff who are performing the test with you before collection.

In case of epilepsy diagnosis, we advise to choose an alternative method of examination.

Examination evaluation

Your doctor will inform you of the result of the examination, to whom we will send the results.

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