How many failed attempts at venipuncture are allowed?

See also

Procedural pain management guideline 
Peripheral Intravenous device management guideline 
RCH comfort kids resources

Key points

  1. Anxiety, pain, distress and subsequent needle phobia is associated with repeated attempts at intravenous access; appropriate preparation can minimise the distress caused.
  2. It is important to justify the need for the procedure and combine with blood sampling if needed.
  3. If available, ultrasound guidance should be considered if intravenous cannulation is predicted to be difficult or prolonged therapy is anticipated.
  4. Some children are at higher risk of decompensation with multiple IV attempts, e.g. child with congenital heart disease and single ventricle physiology.

Background

Multiple attempts at IV insertion can cause significant distress for patients so alternatives to IV access should always be considered within the clinical context e.g. Oral or NG fluids/medication, IM or IO medications in emergencies.

Cannulas inserted over joints, in areas of flexion or in the lower limb are more likely to fail than those inserted in the hand or forearm  

Selection of Intravenous [IV] access 

The following guidelines should be considered when referring patient for IV access

Duration IV access required    Selection of cannula
hand > foot > cubital fossa

Ultrasound guided peripheral IV access [may last up to 7 days]

7-14 days or
failed peripheral IV attempts 
Upper arm midline, PICC [peripherally inserted central catheter] or Percutaneous CVAD [Central Venous Access Device]
>14 days / longer term PICC, percutaneous CVAD, consider tunnelled [surgical] CVAD or port

If available, ultrasound guidance should be considered if intravenous cannulation is predicted to be difficult or prolonged therapy is anticipated [see table below]

Potential Complications

  • Accidental arterial cannulation 
    • Consider intra-arterial cannulation if
      • Bright red backflow of blood into IV cannula
      • The cannula flashback appears pulsatile or there is pulsatile movement of blood in IV tubing
      • Backflow of blood into IV tubing despite fluid bag at level higher than IV insertion site
      • IV inserted in a "high risk" area i.e. antecubital fossa
    • Management if uncertain
      • Do not use cannula
      • Urgent blood gas analysis from inserted cannula 
  • Extravasation injury
  • Needle stick injury
  • Thrombophlebitis / infection
  • Unsuccessful procedure

Equipment, Analgesia, Anaesthesia and Sedation

The patient

Infants 50% chance of failed initial attempt

If difficult intravenous cannulation is predicted based on the above criteria, ultrasound guided insertion should be considered if the equipment and expertise is available.

Some children are at higher risk of decompensation with multiple IV attempts, eg congenital heart disease with single ventricle physiology. If >2 attempts are required involve the senior clinician and consult the treating cardiology team.

Technique

Holding

  • Ask assistant to stabilise limb, by holding joints above and below if necessary
  • If applying tourniquet, be careful not to pinch skin or compress artery
  • In infants, when accessing the hand, grasp as shown; this achieves both immobilisation and tourniquet [Figure 1 below]

Inserting the cannula

  • Decontaminate skin with alcohol 70% / chlorhexidine 2% swabs and leave to dry for at least 30 seconds. Use 'no-touch' technique for insertion after decontamination
  • Insert just distal to and along the line of the vein
  • Angle at 10-15° [Figure 2 below], or between 30-45° if using ultrasound guidance
  • Advance needle and cannula slowly
  • A 'flash back' of blood may not occur for small veins and 24G cannula
  • Once in vein, advance the needle and cannula SLOWLY a further 2-3mm along the line of the vein before advancing cannula off needle
  • Secure the hub of the cannula at the skin entry point either by holding it down or asking the assistant to place tape across
  • Dispose of sharps appropriately


    Taking blood samples

    • For 24G cannula, it is often easier to let blood drip passively into collection bottles [Figure 3 below]
    • When taking blood for culture or gas from small cannula, aspirate blood from the hub of the cannula using a blunt 'drawing up' needle and syringe [Figure 4 below]
    • For larger cannula, a syringe can be used to aspirate blood or a vacuum connector for cannulae 22G and larger
     Figure 3: passive blood collection for infants

    Figure 4: aspirating blood for culture or gas


    Securement

    • Remove tourniquet before strapping
    • Connect the saline-primed 3-way connector to the end of the cannula by screwing it firmly on. Flush the connector tubing with more saline to confirm intravenous placement
    • Use sterile tapes to secure the hub and a clear dressing over the cannula site such as Tegaderm™. Ensure that the proximal tip and area of skin around are always easily visible [Figure 5 below]. Extravasation injuries can occur especially if the site is not readily accessible for regular nursing checks
    • Consider placing a small piece of cotton wool ball or gauze underneath the hub of the cannula to prevent pressure areas
    • Tapes and splint should secure the limb proximal and distal to the cannula [keeping thumb free] but not too tightly [Figure 6 below]
    • Arm splints are not required for lines placed in the cephalic vein in the forearm [typically ultrasound guided]. Cover the whole distal extremity in net bandage [eg surgifix tubular-fast]. In very young children, consider bandaging the other hand as well to prevent them from removing the cannula

    Post-Procedure Care

    • Running a 'drug line' [3-5ml/hr of Sodium Chloride 0.9%] through the cannula may keep it patent for a longer period of time
    • Regularly inspect insertion site for complications [tenderness, blockage, inflammation, discharge] - check the other hand if it has also been bandaged
    • Unless complications develop, the peripheral IV should remain insitu until IV treatment complete

    Difficulty with IV insertion

    Each clinician should have a maximum of 2 attempts before escalating.
    Strongly consider ultrasound assistance, if available, after 3-4 attempts


    *Experienced Clinician – at least 2 years of acute paediatric experience

    For emergency advice and paediatric or neonatal ICU transfers, see  Retrieval Services

    See video


    RCH specific information 

    For assistance with difficult intravenous access

    •  0730 - 1730 [Mon – Fri]: Anaesthetics ASCOM 52000
    • After hours / public holidays: PICU ASCOM 52327

    Last updated September, 2019

    How many times should venipuncture be attempted?

    Don't attempt venepuncture more than 3 times [refer on to more experienced phlebotomist or medic after fewer attempts if you are sure you will not succeed in 3 attempts. Don't use arterial lines to take blood. Care should also be taken not to disturb electrical connections attached to patients and monitors.

    What is the maximum number of attempts at venepuncture or cannulation you would attempt?

    If venepuncture or peripheral cannulation is unsuccessful after a maximum of 2 attempts [1 if the procedure is problematic] the health care professional must request a more experienced health care practitioner to undertake the procedure.

    How many attempts should you make for a successful venipuncture?

    After 4 unsuccessful attempts, it is time for a careful assessment of VAD needs and discussion with the patient's providers to decide on the most appropriate options. Many experts would argue that 4 attempts are too many!

    How many times can a phlebotomist puncture a patient?

    In general, however, it is generally recommended that no more than two venipuncture attempts be made on any one patient by any one person. Using a vein to extract blood and other specimens is a method of obtaining blood and other specimens. A needle, a syringe, or a finger stick can be used to perform venipuncture.

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