Preparing for a Test

One of the most important factors in determining the accuracy and reliability of your lab test is you, the patient. After all, it is a sample from your body (blood, urine, or some other specimen) on which the test will be performed. Therefore, it is essential that you do the following to ensure that the results will be useful and interpreted correctly by your health care provider:

• Follow instructions, if there are any, to prepare for the specific test you are having performed.
• Alert the person collecting your sample if you have deviated from the instructions and how.
• Inform your health care provider of any medications (including vitamins and supplements) you are taking. If you are taking certain prescribed medications, such as blood-thinners or seizure medication, you may want to write down the exact time at which you took your dose and when your blood was drawn. This information will be useful if your doctor has any questions about your test results.

Certain behaviors may affect some test results, such as recent or excessive exercise, not taking in enough fluids (dehydration), excessive eating, or recent sexual activity. You may be asked to refrain from some of these activities for certain tests. It should be noted that many tests require no special preparation. But for those that do, be certain to adhere to the instructions provided. If you are ever unclear about the instructions, be sure to ask the person ordering the test for clarification. If you are not given any instructions, you should ask if there are any special instructions needed to prepare for the test.

Some common laboratory tests that require advance preparation include:


 
Lipid Profile
12 hours
Fasting for 12 Hours
Fasting Blood glucose
6-8 hours
Fasting 6-8 hours
2 hours after meal blood glucose
2 hours
Fasting for 6-8 hours ,then take your meal in a maximum 10minutes ,collection will be 2hours from beginning of eating ,No more eating during the 2hours.
Urine Culture
48 hours
Stop any antibiotic for at least 48 hours, Clean the urogenital organs with soap and water only ,don't use any disinfectant ,first morning urine is the best specimen , Allow a few milliliters of urine to pass then collect the midstream urine in a sterile container.
2 hours after meal blood glucose
24 hours
Specify the time for example 8 AM then discard the first urine sample out ,then begin collection of every sample inside the clean container ,after 24 hours ,8 AM second day the last urine sample will be in the container .then keep in refrigerator.
Semen analysis
2-7 days
Stop any antibiotic for at least 48 hours, Clean the urogenital organs with soap and water only ,don't use any disinfectant ,first morning urine is the best specimen , Allow a few milliliters of urine to pass then collect the midstream urine in a sterile container.