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Blood tests have a vast array of usages and are among the most typical kinds of medical test.
For example, a blood test can be utilized to:
- evaluate your basic state of health
- check if you have an infection
- see how well specific organs, such as the liver and kidneys, are working
- screen for specific hereditary conditions
Most blood tests just take a couple of minutes to finish and are performed at your GP surgical treatment or regional medical facility by a medical professional, nurse or phlebotomist (a professional in taking blood samples).
Preparing for a blood test
The health care expert who organizes your blood test will inform you whether there are any particular directions you require to follow prior to your test.
For example, depending upon the kind of blood test, you might be asked to:
- prevent consuming or consuming anything (fasting) apart from water, for as much as 12 hours — find out more about consuming and drinking prior to having a blood test
- stop taking specific medications
It’s essential to follow the directions you’re provided, as it might impact the outcome of the test and suggest it requires to be postponed or performed once again.
What takes place throughout a blood test?
A blood test generally includes taking a blood sample from a capillary in your arm.
The arm is a hassle-free part of the body to utilize since it can be quickly discovered. The normal location for a sample to be drawn from is the within the elbow or wrist, where the veins are reasonably near the surface area.
Blood samples from kids are frequently drawn from the back of the hand. Their skin might be numbed with an unique spray or cream prior to the sample is taken.
A tight band (tourniquet) is generally put around your arm. This squeezes the arm, momentarily decreasing the circulation of blood and triggering the vein to swell. This makes it much easier for a sample to be taken.
Before taking the sample, the physician or nurse might clean up the location of skin with an antibacterial clean.
A needle connected to a syringe or unique container is placed into the vein. The syringe is utilized to extract a sample of your blood. You might feel a minor pricking or scratching experience as the needle enters, however it should not hurt. If you do not like needles and blood, inform the individual who is taking the sample so they can make you more comfy.
When the sample has actually been taken, the tourniquet will be launched, and the needle will be eliminated. Pressure is used to the skin for a couple of minutes utilizing a cotton-wool pad. A plaster might be placed on the little injury to keep it tidy.
After the test
Only a percentage of blood is taken throughout the test so you should not feel any substantial after-effects.
However, some individuals feel woozy and faint throughout and after the test. If this has actually taken place to you in the past, inform the individual performing the test so they know and can assist you feel more comfy.
After the test, you might have a little swelling where the needle entered. Bruises can be uncomfortable, however are generally safe and fade over the next couple of days.
Blood test outcomes
After the blood sample has actually been taken, it will be taken into a bottle and identified with your name and information. It will then be sent out to a lab where it will be analyzed under a microscopic lense or checked with chemicals, depending upon what’s being examined.
The outcomes are returned to the medical facility or to your GP. Some test outcomes will be prepared the very same day or a couple of days later on, although others might not be readily available for a couple of weeks. You’ll be informed when your outcomes will be prepared and how you’ll be provided.
Sometimes, getting outcomes can be demanding and distressing. If you’re fretted about the result of a test, you might select to take a relied on buddy or relative with you. For some tests, such as HIV, you will be provided professional counselling to assist you handle your outcomes.