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Nursing Procedures and Skills

TYPES OF INTRAVENOUS CANNULA AND THEIR USES

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An intravenous cannula is a flexible tube that can be inserted into a patient’s body through the veins and mostly used for administering medications and I.V. fluids as well as for taking blood samples. The sizes of intravenous cannula have different colour codes for different purposes. Cannula sizes mainly range from 14 to 24 gauge. The purpose, the condition of the patient, and the urgency at which intravenous fluid must be delivered determine which cannula sizes must be used. The smaller the gauge, the larger the diameter of the cannula and the faster the flow of fluid.

CANNULA SIZE: 14G

  • Size: 14G
  • Colour: Orange
  • Length: 45mm
  • Flow rate: 240ml/min

Uses

  • Rapid fluid replacement
  • Blood Transfusion
  • Trauma and major surgery

CANNULA SIZE: 16G

  • Size: 16G
  • Colour: Grey
  • Length: 45mm
  • Flow rate: 180ml/min

Uses

  • Rapid fluid replacement
  • Blood Transfusion
  • Trauma and major surgery

CANNULA SIZE: 17G

  • Size: 17G
  • Colour: White
  • Length: 45mm
  • Flow rate: 130ml/min

Uses

  • Rapid fluid replacement
  • Blood Transfusion
  • Trauma and major surgery

CANNULA SIZE: 18G

  • Size: 18G
  • Colour: Green
  • Length: 32mm
  • Flow rate: 90ml/min

Uses

  • Fluid replacement
  • Blood Transfusion
  • Trauma and major surgery

CANNULA SIZE: 20G

  • Size: 20G
  • Colour: Pink
  • Length: 32mm
  • Flow rate: 60ml/min

Uses

  • Ideal for IV Infusion (Most Commonly used)

CANNULA SIZE: 22G

  • Size: 22G
  • Colour: Blue
  • Length: 25mm
  • Flow rate: 36ml/min

Uses

  • Paediatric (Blood transfusion and Infusion)
  • Elderly and oncology patients

CANNULA SIZE: 24G

  • Size: 24G
  • Colour: Yellow
  • Length: 19mm
  • Flow rate: 20ml/min

Uses

  • Neonate and Paediatric

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