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What is I.V cannula? Types and color coding

An intravenous (IV) cannula is a tube which is placed into one of your veins and it is very small, flexible.
There are many types of I.V Cannula and they are used in different situations. So let’s know about them.
But before you should know that they are measured in gauge. If gauge number is more than the needle is thin or vice versa.

Types of I.V cannula

1. 14G cannula

Color – Orange
Flow rate – 250 to 300 ml/min
Length – 45mm
External diameter – 2.1mm
Uses – It is used for adolescent and adult major surgery and trauma. It is also used for infusion of large amounts of fluids or colloids.

2. 16G cannula

Color – Grey
Flow rate – 150 to 240 ml/min
Length – 45mm
External diameter – 1.8mm
Uses – It is used for adolescent and adult major surgery and trauma. It is also used for infusion of large amount of fluids or colloids.

3. 18G cannula

Color – Green
Flow rate – 100 to 120 ml/min
Length – 45mm
External diameter – 1.3mmUses – It is used for adolescent and adult major surgery and trauma. It is also used for infusion of large amount of fluids or colloids.

4. 20G cannula

Color – Pink
Flow rate – 55 to 80 ml/min
Length – 32mm
External diameter – 1.1mm
Uses – It is used for elder children, adolescents and adults. It is ideal for I.V. infusion and blood infusion. It is also used for medication administration and emergency management.

5. 22G cannula
Color – Blue
Flow rate – 22 to 50 ml/min
Length – 25mm
External diameter – 0.9mmUses – It is for elder children, adolescent and elderly adults. It is I.V. infusion with moderate flow rates. It is also used for medication administration.

6. 24G cannula

Color – Yellow
Flow rate – 23 ml/min
Length – 19mm
External diameter – 0.7Uses – It is used for infants, toddlers, older children. In major surgery and trauma among children. It can administer fluids and medication.

7. 26G cannula

Color – Purple
Flow rate – 10 to 15 ml/min
Length – 19mm
External diameter – 0.6mm
Uses – It is used for neonate, infant and elderly adults. It is suitable for infusion but the infusion rate is low.