Cannulas are commonly used in clinical practice to give fluids and intravenous medications, to do blood transfusions, and to take blood samples for investigations.

This video explains different types of cannulas based on their gauge, color, and how fast they can deliver fluids.

The bigger the gauge number, the wider the cannula.

So, smaller numbers mean faster flow.

Let's start with the biggest, the orange cannula.

It is a 14-gauge and flows the fastest, around 270 milliliters per minute.

It is for emergencies like shock or dehydration, where rapid restoration of blood volume is required.

Next is the gray one, a 16-gauge, flowing at 180 milliliters per minute.

It is used in surgeries and for giving lots of fluids.

Both orange and gray cannulas are used in adults.

Then there's the white, a 17-gauge, flowing at 125 milliliters per minute.

It is for blood transfusions and major surgeries.

The green cannula is an 18-gauge one, with a flow of 80 milliliters per minute, good for adults and older children to deliver medications and fluids.

The pink cannula is a 20-gauge one, flowing at 55 milliliters per minute, used in adults and older children to deliver fluids and medications.

The blue is a 22-gauge, flowing at 33 milliliters per minute, for everyone from the elderly to toddlers to administer fluids and medications.

Finally, the yellow is a 24-gauge, flowing at 20 milliliters per minute, for adolescents, children, toddlers, infants, and neonates.

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