iCliniq Logo
HomeAnswersHematologyblood health

I got my blood grouping, and the technician took a whole syringe of my blood. Is it necessary?

This Premium Q&A, reviewed and published, features a real conversation between an iCliniq user and a physician.

Patient's Query

Hello doctor,

Recently, I went to a nearby hospital for blood grouping. I am concerned if blood grouping needs a whole syringe of blood as the technician did, or was he collecting my plasma for any other purpose without my consent. I am not sure if it was a 10 ml or a 20 ml syringe.

Please help.

Hello,

Welcome to icliniq.com

A technician collects more blood than required because sometimes the test for blood type grouping gets errors and needs more blood. If he had taken only a tiny amount and an error occurred, you would have to give the sample again. So to avoid that, he took more than required. Plasma required for any therapeutic purpose is always more than 250 ml; 10 ml or 20 ml will not help him at all. So do not worry; his intentions were not wrong.

I hope this helps.

Thank you.

Medically reviewed byiCliniq medical review team

Published At April 8, 2022
Reviewed AtMay 19, 2026

Same symptoms don't mean you have the same problem. Consult a doctor now!

Listen to related tracks in our music library

Ask your health query to a doctor online

*guaranteed answer within 4 hours

Disclaimer: No content published on this website is intended to be a substitute for professional medical diagnosis, advice or treatment by a trained physician. Seek advice from your physician or other qualified healthcare providers with questions you may have regarding your symptoms and medical condition for a complete medical diagnosis. Do not delay or disregard seeking professional medical advice because of something you have read on this website. Read our Editorial Process to know how we create content for health articles and queries.