Blood tests are done to check the function of the blood in your body. The most common types of blood tests are blood sugar, cholesterol, blood count, blood pressure, and blood sugar.
Doctors have to draw blood a few different ways. They can use a needle to get a sample of blood from your vein, as well as a special tube with a needle on one end called a syringe or a needleless needle that’s inserted into a vein.
What is the process of drawing blood?
To draw blood, you’ll need to change into a gown and lie flat on your back on the exam table. Your doctor will use the needle or syringe to put a small amount of blood in a tube. Then they’ll usually put a bandage over the puncture site.
How long does it take to draw blood?
The time it takes to draw blood depends on the type of test. Some tests take only a few seconds to draw blood, and others can take up to a few minutes.
How do I prepare for a blood test?
Your doctor will tell you what to do before you get a blood test. If you have a blood test more than once, make sure you take all the instructions.
What if I’m allergic to the test drug?
If you’re allergic to the test drug, tell your doctor. Different drugs have different reactions. Your doctor will know if you have an allergic reaction to blood tests.
If you have an allergic reaction, you may also have symptoms like rash, hives, wheezing, or swelling of your throat or tongue.
Also, if you’re having an allergic reaction, you may not feel able to tolerate the needle. If this happens, tell your doctor. They may give you an injection that’s easier to take.
What happens during a blood test?
A blood draw takes place in the hospital or a doctor’s office. The technician will take a small amount of blood from a vein.
How do I get ready for the test?
Before the test, tell your doctor if you have any allergies. Tell them if you’re taking any medicines, especially aspirin or blood thinners.
How is the blood drawn?
The technician will clean the skin at the site with an antiseptic. They will put a tourniquet around your arm or upper thigh and use a needle to put a small amount of blood in a tube. They may put a bandage over the puncture site.
What happens after the test?
You may have some soreness or bruising at the puncture site for a few days.
The blood test results will be available the next day. The blood sample will be sent to a laboratory for analysis.
What do the results mean?
Blood tests show your doctor how well your body is working. They also tell them if you have a problem that needs treatment.
The blood test results may vary depending on the type of blood test, the lab, and the equipment used.
What are the risks of a blood test?
Most people have no problems from blood tests. But there are some risks. The most common risks are bruising at the puncture site and a reaction to the test drug.
How can I reduce my risks?
Tell your doctor if you have allergies to the test drug or any medicines you take. They can tell you if you have an allergic reaction.
Tell your doctor if you have a history of bleeding disorders or if you’re taking blood-thinning medicine. This can prevent you from getting the test and having a blood clot in your veins. Also, you may not be able to get the test if you have a clotting disorder or are taking aspirin or blood-thinning medicine.
Tell your doctor if you’re pregnant or think you may be pregnant. If you’re having a blood test, you should wait until you finish the last possible period.
How should I prepare for a blood test?
Your doctor will give you specific instructions on how to prepare.
What should I do before my blood test?
Tell your doctor about any medicines you’re taking. This includes aspirin, certain blood thinners, and medicines for diabetes. Your doctor can tell you if you need to stop taking any of these medicines before the test.
How can I get more information?
If you have questions about a blood test, speak with your doctor. They can tell you more about what you’re doing and why it’s being done.
Healthwise, I’m Dr. Robert James, and I’m a family medicine specialist at Caring Medical Group in Nashville, Tennessee.
As a physician, teacher, and researcher, I help people improve their health by practicing evidence-based medicine and making connections between their health and other aspects of their lives.
I’ve presented at a number of national meetings on clinical research and health care quality.
Some of the topics I’ve researched and presented about include:
What is evidence-based medicine?
How can I improve my health?
How can I save money?
I use a patient-centered medical home model to help people improve their health and reduce health care costs.
I help people find ways to improve their relationships with their doctors, to help them make more healthful lifestyle choices, and to reduce health care costs and improve their quality of life.
I help people find new ways to cope with chronic illness and disease and improve their quality of health.
I help people better understand and manage their health care needs and the costs of their care.
In addition to blogging about health, I give talks about evidence-based medicine, and I’m on the faculty of the Vanderbilt University School of Medicine.
I also work with the Tennessee Department of Health and the Tennessee Health Information Exchange to help the public understand health information and how they can improve their health.
My advice to people who want to improve their health and are interested in evidence-based medicine is to find a health care provider who is committed to evidence-based medicine.
When I counsel patients about evidence-based medicine, I tell them that evidence-based medicine is more than following a list of rules or a list of instructions.
Evidence-based medicine is about the kind of care patients receive, not a list of instructions or a set of rules.
I’m glad you found this article.
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- About Dr. James
Dr. Robert James is a family medicine physician and researcher in the Caring Medical Group in Nashville, Tennessee. He’s on the faculty at Vanderbilt University School of Medicine and he’s…
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