An 18G (18 gauge) IV cannula is a commonly used medical device, often green, designed for rapid fluid/blood delivery, featuring a sharp, triple-faceted needle for smooth insertion, a kink-resistant PTFE/FEP catheter, secure wings, and often an injection port for extra medication, allowing quick venous access for transfusions, hydration, and various therapies, with clear flashback chambers for proper placement confirmation.
Key Features:
- Gauge (18G): A larger bore size, indicated by the green color, suitable for high flow rates, ideal for blood transfusions, rapid fluid replacement (resuscitation), and administering viscous medications.
- Needle: Made of stainless steel, featuring a sharp, triple-faceted bevel for minimal patient discomfort and easier penetration into veins.
- Catheter: A flexible, kink-resistant tube (often PTFE/FEP) that remains in the vein after the needle is withdrawn, ensuring smooth flow.
- Wings: Flared grips that provide stability and help secure the cannula to the skin, reducing dislodgement.
- Injection Port (Optional): A port on the wings for administering additional medications without needing another puncture.
- Flashback Chamber: A transparent part that fills with blood upon successful vein entry, confirming correct placement.
Primary Uses:
- Blood transfusions.
- Rapid fluid resuscitation in emergencies.
- Administration of various medications and IV fluids.
How it Works (Simplified):
- A healthcare professional inserts the cannula at a specific angle into a vein.
- Once blood appears in the flashback chamber, the needle is slightly withdrawn, and the flexible catheter is advanced into the vein.
- The needle is then fully removed, leaving the catheter in place for ongoing treatment.
