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It is extremely important.

Not every laboratory is standardized and has the same quality.

Some laboratories do not have permanent specialists.
Some labs do not have instrument and equipment infrastructure.
Some laboratories do not have new devices and equipment.
Some laboratories do not have sufficient knowledge and experience.
Some laboratories do not have a quality assurance system.
Some laboratories are far behind the technological development.
Some laboratories work exclusively for commercial purposes.
A laboratory for quality and reliable results;

It is the one that has experienced, accumulated and professional experts.
The instrument and equipment infrastructure should be adequate.
There should always be medical specialists.
They should closely follow the current medical and technological developments.
It should work scientifically and ethically and not act solely for commercial purposes.
There should be an accredited laboratory to ensure reliability of results.
There should be a quality system (like ISO 9000).
At the same time, there should be TURKAK accreditation. (like ISO 15189 laboratory accreditation)

Producing reliable, accurate and timely test results with high diagnostic value is directly related to taking the clinical samples at the right time, from the appropriate region, under appropriate conditions and transporting them to the laboratory under healthy conditions. For this reason, some points should be considered before giving samples for tests.

Tests that require 12 hours of fasting 

It is recommended that samples should be taken after 12 hours of fasting for all biochemical tests, except in mandatory cases.

(It is appropriate to take blood on an empty stomach in the morning)

• ADH
• alkaline phosphatase isoenzymes
• growth hormone (GH)
• C-peptide
• iron
• Total Iron Binding Capacity
• Folic acid
• gastrin
• glucose
• homocysteine
• insulin
• Insulin Resistance
• Calcitonin
• Cholesterol (Total)
• HDL Cholesterol
• LDL Cholesterol
• VLDL Cholesterol
• triglyceride
• cortisol
• Lactate
• leptin
• Lipoprotein (a)
• Lipoprotein Electrophoresis
• osteocalcin
• pyruvate
• Bile acids
• Free fatty acids (FFA)
• triglycerides
• vitamine B12
• Vitamine E

Required tests after an absolute 12-hour fasting: Hormone Tests with Oscillating Rhythm and Changing Levels During the Day

Especially due to the oscillation rhythm, samples for Cortisol and ACTH tests must be taken between 08:00-10:00 or 16:00-18:00. For other tests, samples should preferably be taken before noon, preferably fasting, as reference range standardization and possible lipemia may affect test sensitivity.

Some Featured Tests

TRIMESTER DOWN SYNDROME SCREENINGTEST:
Blood sample collection and ultrasound measurement should be done on the same day. The time difference between the two should not exceed 24 hours. It is necessary to bring ultrasound measurement values ​​when coming to the laboratory for blood collection.

Stool Microscopy and Parasitological Examination:

Stool sample should be delivered to our laboratories within 1 hour for parasitological examination.

Drug Level Tests

(carbamazepine, cyclosporine, digoxin, lithium, phenytoin, valproic acid, etc.): If your doctor does not have any other recommendations or instructions, it is preferred not to take the drug dose that morning when you come to the laboratory.

Angiotensin Converting Enzyme (ACE):

Within the control and knowledge of your doctor, antihypertensive drugs from the ACE inhibitor group (Kaptopril, Kaptoril, Lopril, etc.) should not be used within 12 hours before sample collection.

Tests Performed from 24-Hour Urine:

Metabolites of many substances in our body are excreted in the urine. In order to accurately assess the levels of these metabolites, 24-hour urine must be collected correctly and delivered to the laboratory under appropriate conditions. For this purpose, the necessary preservatives should be placed in the collection container before the urine starts to be collected. You can obtain these preservatives and suitable collection containers from our laboratories.

24-Hour Urine Sample Collection:

The first urine in the morning is excreted and the bladder is emptied.

All of the urine afterwards is collected into the urine collection container for 24 hours without any leakage. During this period, the collection container is stored in a cool place.

The first urine made the next morning is delivered to the laboratory as soon as possible after it is taken into the collection container.

If the tests listed below are among the tests requested by your doctor, please contact our laboratories to get detailed information about the special collection container containing preservatives and the test to be performed (diet, medicine, etc.).

Stool Helicobacter Pylori Antigen Test (HPSA) and urea breath test:

The use of antibiotics, bismuth-containing drugs and proton pump inhibitors used in the treatment affects the test result. For this reason, it is necessary to give a sample 2 weeks after the end of treatment with these drugs.

Tests that require a Special Diet

5 – Hydroxyindolacetic Acid (5 – HIAA):

The diet should be administered 3 days before and throughout the 24-hour urine sample collection. During this period, chocolate, coffee, tea, banana, tomato, walnut, eggplant, orange, lemon, pineapple containing serotonin should not be taken. It is recommended not to use aspirin, pain relievers, hypertension drugs and cough syrups containing gualiacol.

Oxalic Acid (oxalate) and Citric Acid (citrate):

Spinach, chocolate, tomato, strawberry, ice cream, cake, meat, chicken, fish should not be consumed 2 days before and during urine collection. Medicines containing ascorbic acid (Vitamin C) and calcium should not be taken except in mandatory situations.

TESTS AFFECTED BY ALCOHOL

• Antidiuretic Hormone (ADH)
• Apolipoprotein A
• Apolipoprotein B
• HDL Cholesterol
• Coproporphyrin
• LDL Cholesterol
• Lipid Electrophoresis
• Lipoprotein (a)
• Porphyrin
• Total Cholesterol
• Triglyceride
• Uroporphyrin
• Vanil Mandalic Acid (VMA)
• VLDL Cholesterol

The same urine is not suitable. This is because when specimens are given for urine culture, the urine must be collected in a sterile container, pre-cleaned and placed in a sterile container after the first part of the urine has been transferred to the toilet, and the last part must also be transferred to the toilet to avoid contamination from the external environment.

It can wait until a sufficient amount of urine has accumulated in the bag. However, if there is not a sufficient amount within 30 minutes of bag insertion, the bag should be replaced with a new one.

The urine must remain in the bladder for at least 3 hours. 1-2 ml of urine to be given after proper cleaning is sufficient.

Because menstrual blood may be present in urine passed during menstruation, culture and direct microscopic examination are concerned. The origin of the erythrocytes seen on microscopic examination cannot be distinguished. Microorganisms normally found in menstrual blood and the vagina can be transferred to urine, which is thought to be sterile, leading to misleading results. For this reason, urinalysis and cultures are not performed during menstruation.

Antibiotics can both reduce the growth of bacteria and completely prevent the growth of bacteria. Therefore, they affect the results. For this reason, it is recommended that a culture test be performed at least 2 days after the last antibiotic administration, although this will vary depending on the type of antibiotic used. If it is recommended that samples be taken while taking antibiotics, the name and dose of the antibiotic used should be provided to laboratory personnel, provided your physician is aware of this.

Fasting is not necessary. However, it is necessary not to eat anything in the last 1 hour before giving samples for throat and sputum cultures.

Regarding anatomical characteristics, contamination (vaginal bacterial contamination) is more common in women than in men. To reduce this, cleaning before processing is important.

First, wash your hands with soap. With one hand, open the vaginal lips and with the other hand, wipe the vagina once with a gauze swab from top to bottom (from vagina to anus). This process should be repeated at least 4-5 times with different gauze swabs. After cleaning, keep the vaginal mouth open and let the first urine run into the toilet and the middle urine into the urine culture container. Then quickly close the container without touching the inside of the container with your hand and send the sample to our laboratory.

Since the sample container provided is sterile, the inside of this container or its cover should never be touched while giving sperm, and water, soap, etc. should not be used. It should not be mixed with any other substance. Before the sperm delivery process, the hands and penis should be washed with soapy water and rinsed well. After drying them thoroughly with a napkin, the sperm giving process should be started. At this stage, no lubricant such as water or soap should be used. All of the sperm should be discharged into the given container and the lid should be tightly closed and delivered to the laboratory as soon as possible.

Before the throat culture is taken (1 hour), nothing should be eaten or drunk, mouthwash etc. should not be used.

No, it is not necessary. In the methods we use in our laboratory, we work with tests that are sensitive only to a substance found in human blood (human hemoglobin).

For parasitological testing, a nut-sized stool sample should be submitted to the laboratory in a special container within 30 minutes at the latest. Stool samples should be submitted for at least 3 consecutive days to increase the likelihood of finding parasite eggs.

For culture, a sample should be taken from the bloody and the mucous part of the stool, which should be placed in a special carrier tube and sent to the laboratory as soon as possible.

While the culture of the discharge is taken, first the urethral opening should be cleaned with a sterile tissue, then the discharge should be taken with a swab and placed in a special carrier tube and delivered to our laboratory as soon as possible.

No fungicide should be used for at least 3 days prior to fungal examination and culture, and it is recommended that these areas not be washed when samples are taken from the skin or nails. If a nail sample is to be taken, the nail should not be cut for one week.

If your doctor has not given you information about taking your medication beforehand, we recommend that your blood sample is taken before taking your medicine.

Usually this will not affect your results. If you have medications that you need to take in the morning on an empty stomach, you can take them after your blood is drawn. However, for some special tests to find the cause of high blood pressure, your doctor may ask you not to take your medications for a few days.

A normal carbohydrate diet is followed for three days before the glucose load test. If the diet is too high or too low in carbohydrates, erroneous low or high results will occur.