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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

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.

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.