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Patient Blood Management. Minh-Ha Tran, DO, FASCP UC Irvine Health Transfusion Medicine Service. Agenda. State the guiding principles of Patient Blood Management Name the three phases of perioperative blood conservation Discuss examples of modalities relevant to each phase
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Patient Blood Management Minh-Ha Tran, DO, FASCP UC Irvine Health Transfusion Medicine Service
Agenda • State the guiding principles of Patient Blood Management • Name the three phases of perioperative blood conservation • Discuss examples of modalities relevant to each phase • Define “restrictive” hemoglobin threshold • Discuss transfusion risks • Name three transfusion alternatives • Become acquainted with basic principles of platelet and plasma transfusion practice
Patient Blood Management • A series of ‘rights’ • Right Patient • Right Product • Right Reason • Right Time • Who defines ‘right’? • Clinical decision informed by evidence • Not all hypotension is due to anemia • Not all hypoxia is due to reduced red cell mass • Not all who are anemic require red cell transfusion
A word about PAD • Preoperative Autologous Donation • Induces Preoperative Anemia • Increases risk for allogeneic transfusion • Generates waste as most units wind up discarded • A waning practice…
Restrictive Transfusion Strategies • Emphasize clinical, not just laboratory indicators • Whenever possible: single unit transfusion, then reassess
Transfusion Risks (Allergic)
Anemia Management Strategies • Anemia Tolerance – General Guidelines • Acute bleeding, hypovolemic shock • Transfuse as needed • Surgical management • Chronic anemia, stable patient • Assess for symptoms • …and comorbidities • Determine cause • …and anemia treatment options • Establish timeline for correction • …is the patient preoperative?
Iron Deficiency Anemia • Anemia severity • Endogenous erythropoietic drive • Likelihood of response • Assess for malabsorption, continued losses, anemia of inflammation, renal anemia • Slope of response • Reduced if continued ongoing losses or malabsorption
Malabsorption • Celiac Disease • Inflammatory Bowel Disease • Roux en Y Gastric Bypass • [vegan/vegetarian]
General Comments • Oral Iron • Hb will rise slowly, beginning 1-2 weeks after initiation of treatment • 2 g/dL over ensuing 3 weeks • Hb deficit typically halved by 1 month, normal by 6-8 weeks • Parenteral Iron • In those unresponsive or intolerant to oral iron, or in those whose iron losses exceed absorptive capacity, IV iron is an option • Calculate an iron deficit and replenish the deficit • ESA • If ESA’s are administered for renal anemia, coordinate care with the nephrologist • In noncancer patients, ESA’s may be used to augment the erythropoietic response to iron – particularly in mild anemia or when IDA is complicated by inflammation • Always co-administer with iron to avoid functional iron deficiency
Calculating Iron Deficit • Example: 82 kg woman with heavy uterine bleeding presents with H/H of 6.3 g/dL and 18.9% • Total Blood Volume • 70 mL/kg x 82 kg = 5740 mL (57.4 dL) • Hemoglobin Deficit • 12 g/dL – 6.3 g/dL = 5.7 g/dL • 5.7 g/dL x 57.4 dL = 327 g • Iron Deficit • 3.34 mg Fe/g Hb • 327 g Hb x 3.34 mg Fe/g = ~1000 mg Fe
From the Literature • IDA treatment: • A higher and more rapid hemoglobin response with parenteral iron • Risk of infection increased with parenteral iron • Preoperative anemia: • Oral iron alone ineffective for preoperative purposes, particularly when anemia is mild • Treatment most effective with ESA containing regimen • Critical Care Patients: • ESA alone has minimal impact in transfusion avoidance among critical care patients, particularly when restrictive transfusion strategies are in place
Platelets • Usual Adult Dose is 1 Apheresis Platelet Unit
PCC – first view – Tran, et al. Tran MH, GayatineaR, Albicker P, Baje M. PCC and NovoSeven for Critical Bleeds and Coagulopathy Reversal
PBM PI Project • PMID: 24919540
Summative Comments • Patient Blood Management • Protect the patient from unnecessary or excessive transfusions • Inform transfusion decisions not simply by hemoglobin, but by patient symptoms and comorbidities • Utilize restrictive transfusion strategies • Reduce iatrogenic anemia through reduction in both the volume and frequency of blood draws • Avoid arbitrary 2 unit transfusions • Consider transfusion alternatives for anemia management