FAQ: How To Draw Blood With A Butterfly?

Using Butterfly Needles for Blood Draws and IVs

A butterfly needle is a device that consists of a hypodermic needle, two flexible “wings,” a flexible transparent tubing, and a connector that is used to draw blood from a vein or deliver intravenous (IV) therapy. Butterfly needles have some advantages over straight needles.
Butterfly needles are used by phlebotomists to obtain blood samples for various tests and can be left in a vein for up to seven days if properly secured. Butterfly needles are measured in gauges and typically range in size from 18-gauge to 27-gauge.

How do you insert a butterfly needle?


  1. To hold the needle, place the plastic “wings” between your thumb and first finger.
  2. Hold the needle with the hole (the bevel) facing up and the sharp point down.
  3. Always enter the vein with the needle pointing toward the heart.

Are butterfly needles less painful?

Because butterfly needles are often less painful than straight needles, you may encounter patients who specifically request that you use one. What’s important is that you use the proper gauge to complete the job effectively, quickly, and painlessly as possible.

What is the butterfly method of venipuncture?

A butterfly needle, also known as a “winged infusion set” or a “scalp vein set,” is a device used to access a vein for the purpose of drawing blood or administering medications. It gets its name from the plastic “wings” on either side of a hollow needle used to access the vein.

What is the angle of a butterfly venipuncture?

19.1)Puncture the vein with a quick small thrust. 19.2)Place the needle at a 10-15 degree vertical angle to the patient’s skin.

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Can I request a butterfly needle?

If you’ve been told you have small veins and have previously had difficult blood draws, you might want to request the use of a butterfly needle.

Do butterflies drink blood?

When the opportunity arises, these butterflies will feast upon rotten fruit smoothies. You were right on one thing, thoughu2014he’s most likely a bro. The behavior is most often recorded in males and is thought to aid in their reproductive success.

Why do thicker needles hurt less?

The gauge, or width, of a needle has a lot to do with how painful it is when it pierces your skin; unsurprisingly, the narrower the needle (which, ironically, means it has a larger gauge number), the less it hurts.

What is the smallest needle to draw blood?

The smallest gauge, 25, is mostly used on children. 1 The short needle length allows the phlebotomist to insert it at a shallow angle, which can make it easier to use. There is usually a safety device that slides over the needle after it has been used to reduce the risk of needle stick.

Do smaller needles hurt more?

Smile when the doctor pulls out a large needle; research from Oxford University shows that larger, thicker needles hurt less than smaller, thinner ones.

How can I make a blood test easier?

Drink plenty of water before your appointment; when you’re hydrated, your blood volume rises, making your veins plumper and easier to access. Before you go, eat a healthy meal that’s high in protein and whole grains to avoid feeling light-headed after giving blood.

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What is the most important step in blood collection?

The most important step in specimen collection is patient identification, which involves verifying a patient’s identity. Obtaining a specimen from the wrong patient can have serious, even fatal, consequences, especially for type and cross-match specimens prior to blood transfusion.

Why is it difficult to draw my blood?

You may have been told that you are a “difficult stick” if you have had the phlebotomist stick you more than once for a blood draw. This can happen for a variety of reasons, including small or deep veins, rolling veins, dehydration, collapsing veins, and constricted veins.

What is the correct needle position to be inserted for venipuncture?

Remove the tourniquet when the last tube to be drawn is filling and the needle forms a 15 to 30 degree angle with the surface of the arm. Quickly insert the needle through the skin and into the lumen of the vein, avoiding trauma and excessive probing.

How do you stick a needle in a vein?

Insert the needle into your vein with the needle bevel (opening) facing up, at a 15 to 35 degree angle, and always in the direction of the heart; the more perpendicular the needle is to the injection site, the more likely it is to stick through the vein rather than into it.

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