preoperative anaemia – a reversible risk?...iron bru post - operation . draft evidence statement:...
TRANSCRIPT
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• Mr Toby Richards • Vascular & Endovascular Surgeon • Senior Lecturer in Surgery • University College London
Preoperative Anaemia – A reversible Risk?
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Thank You / Disclosures Grants: NIHR - HTA Covidien / UCL Vifor Pharma / UCL UCH vascular charity SHINE award for Innovation Vifor Pharma Rosetree Foundation Associations: BBTS NHSBT NATA BioIron LSHTM UCL
Industry: Covidien Gore Baxter KCI Starbucks Costa coffee Etc..!
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• Introduction
• Pre Op anaemia & transfusion » The problem
» Audit results
» Iron therapy
» PREVENTT
• Post Op Anaemia » Hb
» Transfusion
» Outcomes
» Trials
Presentation Outline
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Surgery: - What Problem?
• LA
• Keyhole
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Surgery: - The Problem
• Blood Loss
• Transfusion
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Anaemia
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• Anaemia NSQIP – Infection James R. Dunne et al: JSR 2002; 102, 237
– Cardiac Events Wen-Chich Wu et al: JAMA 2007; 22, 2481
– LOS & composite Stefan W Leichtle et al: Jamcollsurg 2010; 212, 187
• Transfusion – Morbidity & Mortality Laurent G. Glance et al: Anaesthesiology 2011; 114: 283
Problem of Anaemia / Transfusion
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US Veterans Database (NSQIP) (n=227,425) Anaemia (n=69,229; 30.4%) 30day mortality 30day composite morbidities (9 defined areas) Multivariate regression (9 defined subgroups) (56 cofactors)
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Univariate analysis
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Effect of Anaemia on Outcome
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Transfusion
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Proportion of CABG patients receiving RBCs
0 10 20 30 40 50 60 70 80
WVUTSRQPONMLKJI
HGFEDCBA
%
National audit of blood use in cardiac surgery, 2011
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• 941,406 patients • 173 Hospitals • 2005-2009
• 48,291 transfused
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Where to start?
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Gynaecology surgery
• 12,836 females – Myomectomy 464 (3.6%) – Simple hysterectomy 11,193 (87.2%) – Complex hysterectomy 1,179 (9.2%) – 48.6 ± 12.1 years
• Anaemia 3,071 (23.9%)
• Transfusion 9.2% vs. 1.5%, p<0.001
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Morbidity & Mortality
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Morbidity & Mortality
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Study on Preop Anaemia
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• Anaemia in Surgical practice
• The problem
• Diagnosis Treatment
UCH – Diagnosis of Anaemia
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1535 Patients Investigated
1511 Patients Operated
718 Patients > 48 hrs
154 Anaemic 190 Units 64 Transfused
564 Non- Anaemic 58 Transfused 121 Units
UCH – PREVENTT audit
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Diagnosis AID v FID v IID?
• MCV < 80 5% • MCH < 27 48% • Ferritin < 30 31% • Ferritin < 100 64% • Fe < 10.6 54% • T sats < 20% 58%
• Effect of Inflammation CrP
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Iron Therapy
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FAIR-HF Study
Functional iron deficiency
• Inadequate iron supply to meet demand despite normal or abundant iron stores
– Normal or high ferritin levels – TSAT <20%
Absolute iron deficiency
• Depleted body iron stores – Low serum ferritin (<100ng/ml) or – TSAT <20%
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Toby Richards - PREVENTT
What is Iron Deficiency? A. Inflammation / Cancer B. Failure Absorption C. Iron not recycled D. Reduced EPO E. BM failure
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FAIR-HF Study
• Natural History of Disease
• Morbidity & Mortality
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Iron Therapy Surgery
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Intravenous Iron in Surgery Spanish Anaemia Working Group
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Treatment of ID anaemias
All Colon cancer
Hysterectomy Arthroplasty
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Iron to treat Anaemia
• N = 7966 • 77 RCT
• Hb higher IV iron v oral (MD 0.59 gm/dl; 95% CI 0.29 to 0.89) IV iron v control (MD 1.06 gm/dl; 95% CI 0.52 to 1.61)
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Iron to treat Anaemia
• BT IV iron v oral (MD -0.54 units; 95% CI -0.96 to -0.12) IV iron v control (MD -1.71 units; 95% CI -3.20 to -0.22) • Oral Iron reduced transfusion (RR 0.71; 95% CI 0.54 to 0.94) HARD ENDPOINTS: - • No difference in QALY • No clinical benefit noted in terms of mortality (RR 1.08; 95% CI 0.50 to 2.32)
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Lost to Follow up / Discontinued (n=15)
Analyse (n=235)
Lost to Follow up / Discontinued (n=15)
Analyse (n=235)
Assess for Eligibility : Patients undergoing elective major surgery
Anaemia (Hb: <12 g/dl) 14 - 42 days before operation
Informed consent
Randomisation 1:1 (n=500 planned)
Exclusion: Iron therapy or blood transfusion in 90 days
B12 or Folate deficiency Unstable cardiac disease
Renal dialysis or creatinine > 180 ALT or AST > 3 x upper limit of normal
Ferric Carboxymaltose (n= 250) Dose by weight (1000mg max)
Placebo (n=250) N/Saline infusion 100
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PREVENTT RCT 2
Co - Primary Outcome: event - unit of blood or death
Secondary Outcomes: POMS
Complications of Tx & transfusion
Surgical Complications + LOS
wound healing + infection
Readmission to hospital
Mortality during follow up (cancer)
Who to treat ??
PREoperative intraVENous iron To Treat anaemia in major surgery
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Post Operative
• Post Partum
• Orthopaedics
• The need • good multicentre RCTs • Good Endpoints
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PPH
• P PP IDA (Hb<90, Ferritin < 15) n=44 • I Iron Sucrose 200md D2 D4 • C Oral Iron 200mg BD 6 weeks • O Hb levels
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Multicentre RCT
• P PP IDA (Hb<85, Ferritin < 15) n=128 • I Iron Sucrose 200md D1,2,3 + oral Iron W4 • C Oral Iron 100mg BD 12 weeks • O Hb levels + QALY (of mother)
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•
• • P= 0.89 at 4 weeks • • Ferritin significant
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QALY SF36: Pain only FATIGUE Physical improved Mental n.s.
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Orthopaedics
EVIDENCE and TRIALS • Oral Iron
• Transfusion
• Outcomes
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Orthopaedics
• 3 RCT on oral iron ns – Del Campo 1982, Crosby 1994, Aufricht 1994
• No real point in Post Op Iron?
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Iron Bru Post - Operation
Draft Evidence Statement: GN3.6 In cardiac and orthopaedic surgery patients the effectiveness of postoperative intravenous iron compared to postoperative oral iron on the incidence of transfusion, postoperative haemoglobin levels and ferritin levels is uncertain14. (Grade D)
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SURGERY POST OP HARD EVIDENCE and ENDPOINTS
• Oral Iron not effective
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Original Article Liberal or Restrictive Transfusion in High-Risk
Patients after Hip Surgery
Jeffrey L. Carson, M.D., Michael L. Terrin, M.D., M.P.H., Helaine Noveck, M.P.H., David W. Sanders, M.D., Bernard R. Chaitman, M.D., George G. Rhoads, M.D.,
M.P.H., George Nemo, Ph.D., Karen Dragert, R.N., Lauren Beaupre, P.T., Ph.D., Kevin Hildebrand, M.D., William Macaulay, M.D., Courtland Lewis, M.D., Donald Richard
Cook, B.M.Sc., M.D., Gwendolyn Dobbin, C.C.R.P., Khwaja J. Zakriya, M.D., Fred S. Apple, Ph.D., Rebecca A. Horney, B.A., Jay Magaziner, Ph.D., M.S.Hyg., for the
FOCUS Investigators
N Engl J Med Volume 365(26):2453-2462
December 29, 2011
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• P Hip #, Hb<100, RF n=2106 • I Hb > 80 • C Hb > 100 • O Alive and able to walk
‘Higher Hb will improve functional outcome’
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Lowest Daily Hemoglobin Levels.
Carson JL et al. N Engl J Med 2011;365:2453-2462
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Hemoglobin Levels and Transfusions.
Carson JL et al. N Engl J Med 2011;365:2453-2462
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Transfusion Restriction
• 1’ endpoint (35.2% vs. 34.7%, P = 0.90)
‘Scores for physical activities of daily living, instrumental activities of daily living, and fatigue were not validated and were not useful for analysis for 45 to 60% of patients’
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SURGERY POST OP HARD EVIDENCE and ENDPOINTS
• Oral Iron not effective
• Liberal transfusion not effective – Restrictive transfusion safe
– Mortality – Walk unaided – Post Op Complications
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SURGERY POST OP HARD EVIDENCE and ENDPOINTS
• Oral Iron not effective
• Liberal transfusion not effective – Restrictive transfusion safe
– Mortality – Walk unaided – Post Op Complications
– Anaemia and blood not associated with Delirium
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SURGERY POST OP HARD EVIDENCE and ENDPOINTS
• Oral Iron not effective
• Liberal transfusion not effective – Restrictive transfusion safe
– Mortality – Walk unaided – Post Op Complications
– Anaemia and blood not associated with Delirium – Infection – QALY?
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IV Iron
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IV Iron Post Op
• 2004-2011 • Post op IV Iron (PIVI)
• Cost Effective?
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IV Iron Post Op
• Cost neutral
• ? NEED
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RCT Post op Iron
• P Hip # n=200 • I IV Iron 200mg x 3 • C Standard of Care • O Reticulocyte count
Phase II – pilot for formal phase III RCT
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Conclusions • Iron Bru is good stuff
– increase Hb – Other effects of Iron?
• Effective in Observational Studies • Not as effective in RCTs??
• Need for Hard Evidence
• Good Audits • Patient Centred Outcomes • Define Populations where quality effect
• Anaemia / Transfusion / Iron
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PBM in the UK – the next big centre National Comparative Audit
of Blood Transfusion
Blood Matters: doing nothing is not an option Sir Bruce Keogh, NHS Medical Director Patient Blood Management: threats and opportunities Lynda Hamlyn, Chief Executive of NHS Blood and Transplant
Patient Blood Management - The Future of Blood Transfusion
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Teamwork • TSC • Andrew Bradbury (Birmingham) • Jane Keidan (King’s Lynn) • Stefan Anker (Charite) • Iain MacDougall (King’s College) • Andrew Klein (Papworth) • Toby Richards (UCL) • Shelley van Loen (lay member) • Trevor Burley (lay member)
• DSMC • Chair: Lorna Williamson (Medical and
Research Director, NHS Blood and Transplant) • Angela Crook (Senior Statistician, Medical
Research Council Clinical Trials Unit) • John Pepper (Consultant Cardiac Surgeon,
Royal Brompton)
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PREVENTT RCT • Join the Research Collaboration:
– 07794439113