Peripheral intravenous cannulation
Role of a peripheral intravenous (iv) cannula
- Administration of intravenous drugs and fluids
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Equipment required for an iv cannula
- Tourniquet
- Cleaning swab
- Cannula of an appropriate Gauge- this depends on what you plan to administer
- Gauze
- 10ml Normal Saline flush
- “octopus” attachment
- Sharps bin
- Equipment to take blood if this is also required at the same time as cannulation
- Gloves
- Cannula dressing
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Contraindications to iv cannulation
- Do not insert in an area of infection
- Avoid using feet if possible especially in diabetics and patients with peripheral vascular disease
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The procedure for iv cannulation
- Consent the patient verbally after explaining the procedure
- Set up a tray with your equipment and sharps bin
- Flush the “octopus”
- Apply the tourniquet
- Select an appropriate vein
- Clean with the cleaning swab
- Insert the cannula into the vein ensuring you do not insert it too deeply.
- Withdraw the needle and fix the “octopus”, dispose of your sharp
- Flush the cannula via the “octopus”
- Fix the cannula with a dressing
- Date the cannula
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In the event of failure
- Inform patient
- Call senior
- Attempt to optimise conditions e.g. warm water, blood pressure cuff opposed to a tourniquet, take your time
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Top Tips for iv cannulation
- Before commencing the procedure, always ensure you have space to access the limb and that the patient is comfortable.
- Take your time; failed cannula attempts are usually due to rushing and not considering all possible insertion sites
- Always have gauze handy as cannulas can make a mess which patients and nurses tend not to like!
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Click here to download free teaching notes on iv cannulation: Procedures – Cannulation
Perfect revision for medical students, finals, OSCEs and MRCP PACES