Izhaar Ahmad serves 9 years of his precious life in surgical business. Now, he is running Pakistan’s #1 surgical store Surgicals.pk. He knows ins and outs. Read his articles and get benefits from his experience.
Cannulas are one of the most important medical tools, which may seem simple but have great significance in everyday healthcare. Whether it’s about delivering oxygen or drawing blood, cannulas come in different forms, sizes, and types.
Cannulas may go unnoticed by some, but tothose who greatly rely on them – they are surely lifelines in every sense of the word. So, they may be small in size, but their role in modern medicine is monumental.
There is a lot to discuss about cannulas. Let’s break it down clearly and strategically so you can easily understand the importance, their purpose, types, sizes, and uses in everyday healthcare
A cannula is basically a thin and flexible tube inserted into a vein or artery. A cannula helps deliver or remove fluids from the body. It is often used with a needle during insertion. But the tube always stays in place until the needle is removed carefully. Cannulas are widely used in hospitals and clinics.
Let’s study various types of cannula. Cannulas have lots of types, and each one comes with a different purpose. Let’s break down cannula types and colour and their uses.
An intravenous cannula is always placed into a vein to give medication or blood. It can be mainly used in emergencies or during surgeries. They are available in different sizes; each comes in a different color for quick identification.
Why do they matter?
A nasal cannula is a lightweight and simple type of tube that sits under the nose with prongs inserted into the nostrils. It is mainly used for patients who need extra oxygen. They are available in both standard and high-flow varieties.
When are they used?
An arterial cannula is used for insertion into arteries to collect samples or monitor blood pressure. This is mostly used in the ICU or operating rooms.
This cannula is used to remove fluids or fat during medical procedures. They are comparatively bigger and more rigid than IV or nasal cannulas.
A drainage cannula helps in draining fluid from the body, like in chest drains. These cannulas are life-saving in different conditions, like lung infections or heart surgeries.
You can identify IV cannulas by two things:
Here is a breakdown of different types:
Medical staff choose cannula size and color according to age. Not every cannula fits every patient or situation. Medical staff select cannulas based on:
For example, a trauma patient may need an orange 14G for rapid blood flow, and an IV cannula size for child will be 24G and a yellow one.
Nasal canals are not color-coded coded and this differentiates them from IV cannulas. Instead, they are available in different sizes based on patients’ needs.
A cannula and a catheter are two different things. While they look similar but they have totally different functions.
| Features | Cannula | Catheter |
| Main use | Entry points for fluid or oxygen | Drain urine or administer fluids |
| Placement | Vein, artery, or nostrils | Bladder, veins, or other cavities. |
| Duration | Short to mid-term | Short to long-term |
| Common types | IV, nasal, arterial | Foley, central line, PICC |
Cannulas are used in different medical situations, such as:
A patient with trauma may get a 14-G IV cannula for blood transfusion.
A patient in respiratory distress may be hooked to an HFNC.
Nurses may use 22G or 24G cannulas for chemo patients with thin veins.
A 24-G yellow cannula is ideal for babies or neonates.
A nasal cannula helps elderly patients receive constant oxygen.
Keep these things in mind in case you have to use cannulas:
Knowing about cannula sizes, colors, types, and uses might seem technical, but it’s incredibly helpful whether you’re a healthcare student, patient, or caregiver. Each type serves a unique purpose, and choosing the right one can make a huge difference in a patient’s treatment and comfort.
If you’re looking to buy quality cannulas or other essential medical supplies, Surgicals.pk offers a wide range of reliable options right at your fingertips.
Got more questions about medical tools like this? Let us know—we’re here to explain the essentials in a way that actually makes sense!