IV Cannula Sizes: From 14G to 24G — How to Choose the Right Gauge

When selecting an IV cannula, one of the most important factors is gauge size. Choosing the correct IV cannula size can directly impact patient comfort, infusion speed, and clinical outcomes.

In this article, we’ll explain the different IV cannula sizes (14G to 24G), their uses, and color codes, so you can quickly decide which gauge is best for your needs.

What Is IV Cannula Size?

The size of an IV cannula is measured in gauge (G). The gauge number refers to the internal diameter of the cannula tube:

* The smaller the gauge number, the larger the cannula size.

This means a 14G cannula is much larger in diameter than a 24G cannula.

IV Cannula Sizes and Color Codes

Choosing the Right IV Cannula Gauge

When deciding on the correct IV cannula size, consider:

1. Patient condition: Fragile veins may require smaller sizes (22G–24G).

2. Infusion needs: Rapid transfusions require larger sizes (14G–18G).

3. Procedure type: Surgery or emergencies often use larger cannulas; routine therapy may use smaller ones.

* Example: For blood transfusions, an 18G IV cannula is often recommended.

IV Cannula Types by Size

1. IV cannula with injection port – useful for multiple medications without repeated punctures.

2. IV cannula with wings – provides stability and comfort during longer infusions.

3. Standard IV cannula – for general fluid and medication administration.

Each size (14G to 24G) is available in these variations, allowing clinicians to choose the best combination of size + type.

TICARE® IV Cannulas — 14G to 24G

The TICARE® IV Cannula range covers the full spectrum of sizes to meet hospital and clinical needs:

1. Sizes: 14G, 16G, 18G, 20G, 22G, 24G

2. Options: With injection port, with wings, or standard

3. Color-coded hubs for fast identification

4. Sterile, EO sterilized, single-use

* Explore our full product here: TICARE® IV Cannula 14G–24G

FAQs About IV Cannula Sizes

Q1: What size IV cannula is best for blood transfusion?
The 18G cannula (green) is commonly used for blood transfusions.

Q2: Which IV cannula size is used for neonates?
The 24G cannula (yellow) is used for neonates and very fragile veins.

Q3: What is the most commonly used IV cannula size?
The 20G cannula (pink) is often used for routine IV fluids and antibiotics.

Q4: Why are IV cannulas color-coded?
Color coding helps clinicians quickly identify the cannula size during emergencies.

Final Thoughts

Choosing the right IV cannula size is essential for safe and efficient patient care. With options from 14G (large, orange) for trauma to 24G (small, yellow) for neonates, healthcare professionals can select the best gauge based on patient needs and treatment goals.

TICARE® offers a complete range of IV cannulas (14G–24G) with injection port, winged, and standard options, ensuring quality, safety, and comfort for every patient.