Clinical Research Glossary

blood draw blood draw


Taking a sample of blood by using a needle.

Example of blood draw in a sentence

A blood draw from a vein is often needed for lab tests.

More Info

If a study includes a blood draw, it means one (or more) samples of the participant’s blood will be taken for the research.

Other info to think about when joining a study

Some research studies require one or more blood draws. The blood draw could happen at any study visit depending on the study you join.

You can clarify if and when you need a blood draw during the study. You may also want to ask if you need to do anything to prepare, like skip a meal if it is a fasting blood draw.

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