Key Takeaways
- A routine blood draw takes a few minutes.
- The needle is usually in for less than a minute, depending on how many tubes are needed.
- Tubes are filled in a set order (the order of draw) so additives do not mix.
- Afterwards, press on the site and avoid heavy lifting with that arm for the rest of the day.
Why Knowing What to Expect Helps
Not knowing what will happen is a big part of blood test anxiety. This guide walks through a typical blood draw, whether it happens at a surgery, a hospital or at home.
Step 1: Identification
The phlebotomist confirms who you are, usually by asking your full name and date of birth, and checks which tests have been requested and whether there are special instructions such as fasting. Mention any allergies (especially to latex or adhesive), any medicines you take, and whether you have fainted during blood tests before.
Step 2: Consent
The phlebotomist explains what they are going to do and asks whether you are happy to go ahead. You can change your mind at any point before the needle goes in.
Step 3: Tourniquet
An elasticated band goes around your upper arm. It makes the veins fill so they are easier to see and feel. It feels tight but should not hurt, and it is only on briefly. You may be asked to make a fist.
Step 4: Choosing a Vein
The usual site is the inner crease of the elbow, where the veins are large and close to the surface. If those are hard to reach, the phlebotomist may use a vein elsewhere on the arm, or on the back of the hand.
Step 5: Cleaning the Skin
The skin is cleaned with an alcohol wipe and left to dry, which protects the sample and reduces the risk of infection.
Step 6: The Needle
The phlebotomist steadies the vein and inserts the needle at a shallow angle. You feel a brief sharp scratch or pinch; after that most people feel only pressure. Needles are single-use and go straight into a sharps bin afterwards.
Step 7: Filling the Tubes
Blood flows into colour-coded tubes, each with a different additive for different tests. They are filled in a set order, the order of draw, so additives do not carry over from one tube to the next. Each tube is gently turned over a few times to mix the blood with the additive.
Step 8: Removing the Needle
The tourniquet comes off, the needle comes out, and a pad goes over the site. Press firmly for a few minutes with your arm straight; bending it can cause a bruise. The phlebotomist then checks the site and applies a plaster. If you bruise or bleed easily, tell them, as you may need to press for longer.
Step 9: Labelling
Every tube is labelled there and then with your details, so samples cannot be mixed up. You may be asked to check the label.
Step 10: To the Laboratory
The tubes go in a specimen bag with the request details and are sent to the laboratory.
Afterwards
Keep the plaster on for a while and avoid heavy lifting with that arm for the rest of the day. Have a drink and a snack if you feel light-headed or were fasting. A small bruise is normal and fades within a few days. Results go to whoever requested the test.
Booking blood draws for your patients?
Lola Dispatch is an invitation-only platform healthcare businesses use to book mobile blood draws with approved phlebotomists. It does not take bookings from the public.