Using a cannula for injection involves a specific procedure to ensure proper placement and administration. The provided reference details steps for inserting a cannula into a vein, which is a preliminary step to injecting medication through it. Here’s a breakdown of the insertion process, which directly precedes injection:
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Hand Hygiene: Begin by washing your hands thoroughly. The reference mentions "Wash hands again," implying this is done before gloving.
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Don Gloves: Wear sterile gloves to maintain asepsis and prevent infection.
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Prepare the Cannula:
- Remove the cannula sheath.
- Open the cannula wings, these are used for securing the cannula to the patient's skin after insertion.
- Ensure the cannula mechanism slides smoothly to facilitate easy advancement into the vein.
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Vein Access:
- Secure the vein from below with your non-dominant hand, applying gentle traction to stabilize it.
- Ensure the needle bevel is facing upwards during insertion.
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Cannula Insertion:
- Insert the cannula at a shallow angle of 10-30º into the vein. This angle is crucial for successful vein entry without passing through the vein.
After successful insertion, the needle is partially withdrawn, the cannula advanced fully into the vein, and then the needle is removed completely. At this point, you would then connect your syringe containing the medication to the hub of the cannula to perform the injection. Secure the cannula in place with appropriate dressings before injecting.
