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Patient Blood Management in the Surgical Setting

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  • See also

    Anaemia
    Iron deficiency
    Blood product prescription 
    The Australian Red Cross Blood Service anaemia and haemostasis overview

    Key Points

    1. Patient Blood Management (PBM) aims to improve clinical outcomes by avoiding unnecessary exposure to blood components
    2. Assess all children undergoing surgery for risk of requiring RBC transfusions intra- or post-operatively

    Background

    • Anaemia and iron deficiency may be seen prior to paediatric surgery and are risk factors for adverse clinical outcomes and red blood cell (RBC) transfusion
    • Identify and treat pre-operative anaemia prior to elective surgery associated with significant blood loss, with the aim of reducing a child’s risk of needing RBC transfusion

    Three pillars of PBM applied to the surgical setting

    Pre-operative

    • Optimise a child’s red cell volume and red cell mass
      • Identify and treat iron deficiency with or without anaemia prior to surgery
      • Review medications and consider ceasing prior to surgery

    Intra-operative

    • Minimise intra-operative blood loss
      • Surgical/anaesthetic techniques; use of antifibrinolytics and cell salvage where appropriate
      • Maintenance of normothermia
      • Minimise unnecessary blood tests
    • Avoid unnecessary transfusions

    Post-operative

    • Minimise post-operative blood loss
      • Minimise unnecessary blood tests
    • Optimise a child’s tolerance of anaemia
      • Optimise oxygen delivery to tissues
    • Avoid unnecessary transfusions

    Assessment

    Any child undergoing elective surgery and at risk of requiring a RBC transfusion intra- or post- operatively should be assessed with regard to PBM. Assess pre-operatively for anaemia and iron deficiency

    Red flags: See Anaemia and Iron deficiency

    Considerations:

    • Nature and length of surgical procedure
    • Concurrent anti-platelet or anticoagulant medications
    • Bleeding risk of surgery
    • Previous operative history
    • Previous RBC transfusion audit data

    Management

    Pre-operative

    Pre-operative anaemia and iron deficiency assessment and optimisation

    PBM Diagram

    Intra-operative principles

    • Maintenance of normothermia (temperature >36°C)
    • Meticulous surgical and perioperative haemostasis to minimise blood loss
    • Intravenous antifibrinolytics (eg tranexamic acid or aprotinin)
    • Cell salvage
    • Acid base balance status (pH >7.2 and ionised calcium >1.1 mmol/L)
    • Optimise tissue oxygenation and perfusion, as well as cardiac output
    • Minimise frequency and volume of blood sampling
    • Point of care testing including viscoelastography
    • ‘Restrictive’ transfusion triggers
    • Single unit RBC transfusion in stable, non-bleeding children with reassessment of Hb between units 

    Post-operative principles

    • Maintenance of normothermia (temperature >36°C)
    • Optimise tissue oxygenation and perfusion, as well as cardiac output
    • Acid base balance status (pH >7.2 and ionised Ca2+ >1.1 mmol/L)
    • Tranexamic acid
    • Single unit RBC transfusion with reassessment of Hb between RBC units
    • Minimise frequency and volume of blood sampling
    • Early removal of sampling lines when child is stable and frequent sampling no-longer required
    • Clinical pathways for surgical specialities that inform clinicians of routine post-operative blood tests
    • Consider iron supplementation in children who are anaemic after surgery (see Iron deficiency)

    Post-operative RBC transfusion triggers


    Hb <70 g/L

    RBC transfusion is often indicated, however lower thresholds may be acceptable in children without symptoms and where specific therapy (eg iron) is available

    Hb <70-90 g/L

    RBC transfusion may be indicated, depending on the presence of bleeding and clinical signs or symptoms of anaemia

    Hb >90 g/L

    RBC transfusion is often unnecessary and may be inappropriate

    Note: higher thresholds may be indicated for specific situations, eg pre-term neonates, children with cyanotic congenital heart disease and extracorporeal life support (ECLS)

    Blood conservation strategies

    • Reducing laboratory ordering, rationalising and consolidating laboratory blood testing
    • Use of neonatal collection tubes
    • Strict adherence with minimum volume analyte volumes for pathology tests
    • Early removal of sampling lines
    • Returning of discard volumes
    • Point of care testing devices
    • Extended expiry blood group and antibody screen in neonates <4 months and surgical patients

    Consider consultation with local paediatric team when

    Iron deficiency and/or anaemia are identified

    Consider transfer when

    Children requiring care beyond the level of comfort of the local hospital 

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

    Parent information

    Blood product transfusion 

    Additional resources

    Blood safe eLearning Australia
    RCH Blood transfusion  
    RCH Blood Transfusion additional links

    Updated November 2023

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