Chapter 17: Vascular access devices: insertion and management
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17.4 Peripheral cannula insertion
Essential equipment
- Personal protective equipment
- Sterile pack
- Various gauges of cannula
- Alcohol‐based skin preparation, e.g. 2% chlorhexidine in 70% alcohol
- Extension set (if needed)
- Needle‐free connector
- Semi‐permeable transparent IV film dressing
- Bandage or tubular bandage (if needed)
- 5 mL syringe
- Blunt drawing‐up needle
- Tourniquet (disposable)
- Sharps container
- Labels
Optional equipment
- Securing device, e.g. StatLock
- Topical local anaesthetic
Medicinal products
- 0.9% sodium chloride: 5 mL
Pre‐procedure
ActionRationale
- 1.
Introduce yourself to the patient, explain and discuss the procedure with them, and gain their consent to proceed.To ensure that the patient feels at ease, understands the procedure and gives their valid consent (NMC [356], C).
- 2.If the patient requires topical local anaesthetic, apply it to the chosen venepuncture site and leave in place for 30–60 minutes prior to cannulation.In order to give adequate time for the local anaesthetic to be effective (BNF [42], C).
- 3.Assemble all the equipment necessary for cannulation.To ensure that time is not wasted and that the procedure goes smoothly without unnecessary interruptions. E
- 4.Check all packaging before opening and preparing the equipment to be used.To ensure all equipment is in date and not contaminated. E
Procedure
- 5.Wash your hands using bactericidal soap and water or an alcohol‐based handrub and dry.
- 6.Check your hands for any visibly broken skin, and cover any breaks with a waterproof dressing.To minimize the risk of contamination of the nurse by the patient's blood (Loveday et al. [278], C).
- 7.Ensure adequate lighting and privacy, and assist the patient into a comfortable position.To ensure that the nurse and patient are comfortable and that adequate light is available to illuminate the procedure. E
- 8.Support the chosen limb on a pillow.To ensure the patient's comfort and give the nurse ease of access. E
- 9.Apply a tourniquet to the chosen limb, or use other methods if appropriate.To dilate the veins by obstructing venous return (Dougherty [124], E).
- 10.Assess the veins and select one for use (Action figure 10).To select a vein (Dougherty [124], E).
- 11.Release the tourniquet.To ensure that the patient does not feel discomfort while the device is selected and equipment is prepared (Dougherty [124], E).
- 12.Select a device based on the vein size.
- 13.Wash hands with soap and water, or an alcohol‐based handrub, and dry.
- 14.Open a pack, empty all equipment onto the pack and place a sterile dressing towel under the patient's arm (Action figure 14).To create a clean working area. E
- 15.Prime the extension set with a syringe containing 0.9% sodium chloride (unless taking blood samples immediately after cannulation). Note: when using a closed system integrated peripheral intravenous cannula, there is no need to prime the system.To remove air from the set prior to connection. If taking blood then the sodium chloride will contaminate the sample (Dougherty [124], E).To reduce the manipulation of components and minimize the risk of contamination. E
- 16.Reapply the tourniquet.To promote venous filling (Dougherty [124], E).
- 17.Clean the patient's skin over the selected vein for at least 30 seconds using 2% chlorhexidine using back‐and‐forth strokes with friction and allow to dry (see Figure 17.18). Do not repalpate the vein or touch the skin.
- 18.Put on gloves.To prevent contamination of the nurse from any blood spill (DH [117], C).
- 19.Remove the needle guard and inspect the device for faults (Action figure 19).
- 20.Anchor the vein with the non‐dominant hand by applying manual traction on the skin a few centimetres below the proposed site of insertion.To immobilize the vein. To provide counter‐tension, which will facilitate a smooth needle entry (Dougherty [124], E).
- 21.Holding the cannula in the dominant hand, ensure that it is in the bevel‐up position and place the device directly over the vein; insert the cannula through the skin at the selected angle according to the depth of the vein (Action figure 21).To ensure a successful, pain‐free cannulation (Dougherty [124], E).
- 22.Wait for the first flashback of blood in the flashback chamber of the stylet (see Action figure 21).To indicate that the needle has entered the vein (Dougherty [124], E).
- 23.Level the device by decreasing the angle between the cannula and the skin. Advance the cannula slightly to ensure entry into the lumen of the vein.To avoid advancing too far and causing damage to the vein wall. To stabilize the device (Dougherty [124], E).
- 24.Withdraw the stylet slightly with the dominant hand and a second flashback of blood will be seen along the shaft of the cannula (Action figure 24).To ensure that the cannula is still in a patent vein. This is called the ‘hooded technique’ (Dougherty [124], E).
- 25.Maintaining skin traction with the non‐dominant hand, slowly advance the cannula off the stylet and into the vein using the dominant hand.To ensure that the vein remains immobilized, thus reducing the risk of a through‐puncture (Dougherty [124], E).
- 26.Release the tourniquet.To decrease the pressure within the vein. E
- 27.Apply digital pressure to the vein above the cannula tip and remove the stylet (Action figure 27). Note: when using an integrated closed system peripheral intravenous cannula there is no need for digital pressure as blood is contained within the system by a vent plug.To prevent blood spillage. ETo minimize exposure to blood. E
- 28.Immediately dispose of the stylet in an appropriate sharps container (Action figure 28).
- 29.Attach a primed extension set, needleless injection cap or administration set (Action figure 29). Note: when using an integrated closed system peripheral intravenous cannula, there is no need to attach an extension set as it is integrated.
- 30.Using the sterile tape provided in the dressing package, secure the cannula using, for example, the method illustrated in Action figure 30, always allowing visualization of the insertion site.
- 31.Aspirate to check for blood flashback then flush the cannula with 0.9% sodium chloride using a pulsatile flush ending with positive pressure.
- 32.Observe the site for signs of swelling or leakage and ask the patient whether they are experiencing any discomfort or pain.To check that the device is positioned correctly and is stable and secure (Dougherty [124], E).
- 33.Cover the entry site with a semi‐permeable transparent IV film dressing (unless contraindicated) and apply a date and time label (Action figure 33).
Post‐procedure
- 34.Remove gloves and discard waste, making sure it is placed in the appropriate containers.
- 35.Document date and time of insertion, site, size of cannula, number of attempts, and volume and type of flushing solution, and sign in the patient's notes or care plan.