Actually there are two main reasons:
1 – The best time to take the test: Lab doctor asks the patient about special time to take the blood sample
2- The real time to receive the test results: The Patient asks the lab personnel for the waiting time to receive his/her results.
Forget the anxiety of waiting for test results and start understands the meaning of time in the testing.
First discussion will be around the right time to take a sample for testing, begins when official of the lab asks the patient for certain times before to carry out the appropriate test, examples of these:
Fasting time before a test
But; what is the benefit of fasting before a medical analysis?
Determination the time of fasting before going to the lab depends on the type of testing analyte.
For example, the analysis of blood sugar, uric acid, and RBC sedimentation rate need to 6 hours before taking the sample, why?
Because blood sugar up to its lowest level in the blood after 6 hours from the last time of eating.
Uric acid is up to normal level in the blood after about 4-6 hours.
Sedimentation rate of red blood cells: the percentage of sedimentation of blood cells increasing falsely by the existence of excessive food content in the blood fluid.
Thus: The Patient asked to fast before taking laboratory tests because analyte reach its lowest or highest points at that time specified.
The time of the last dose of monthly patient treatment
In the analysis of blood thinners and prothrombin time test the dose of anti-coagulators or anti-thinners medication is depend on results of prothrombin time analysis, and asses in determine a new sets up dose time when the failure of the current dose in maintain blood clotting time. read more about PT time.
In the analysis of blood sugar: the existence of treatment chemical in the patient’s blood before the time of the analysis of blood sugar may decrease the blood glucose level falsely.
In follow-up tests of anemia: the time of the follow-up analysis determines the treatment dose.
Urine and stool have to wait up to one hour before bacteria multiplying and begin to convert all chemicals soluble to another forms, the earlier is the best.
For more information about the interpretation of pregnancy test results and the menstrual cycle in women read this topic> here.
Circadian and diurnal test
Microbiological tests time
What does it take for drugs and alcohol to appear in urine or blood sample?
Any chemical found in the blood still upon the person’s metabolism but has what is called “half life time”: it is the time needed to the chemical to be cleared completely even the traces from the blood fluid.
Alcohol and drugs have certain time to be cleared from the blood, the time where NO Alcohol and NO drugs still exist in the blood, depends on how chronic the addicted or smoker is?, usually 1 week for drugs occasional taking and up to 1 month (30 days) for Hooked and Addicted to alcohols.
It’s probably still in your system, although some tricks are used such as drinking water, vinegar and exercising a detox kit/pills if you’re really pressed for time can help get you clean.
Go to a drug store and buy a test kit for like $15. You can check yourself if you will pass, before going to your real pre-work examination. Then you should stop for good.
But, How long you will stay after the sample is taken to receive your results, the next article have more details for this important subject… follow me to be the first to know.
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