blood transfusion

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Introduction

Emergencies

Indications

* post acute myocardial infarction, a transfusion threshold of hemoglobin < 8 g/dl was non-inferior to a transfusion threshold of hemoglobin < 10 g/dl in preventing major cardiovascular events within 30 days[37] (no statistical difference[38]

Contraindications

* discuss alternative strategies during informed consent

* Rh-negative females of child-bearing potential should never be given Rh-positive blood[2]

Benefit/risk

* largest trial used a blood hemoglobin of 10.0 g/dL for liberal & 7.0 g/dl for conservative transfusion threshold[19]

* other studies used varying hematocrit levels as the trigger, or followed a protocol of immediate post-operative transfusion vs transfusing at a blood hemoglobin below 9.0 g/dL[19]

* 30-day mortality is higher in transfused than in nontransfused post surgical patients (13% vs 10%)[20]

* 30-day incidence of postoperative complications is higher in transfused patients (43% vs 39%)[20]

* restrictive stategy (Hgb < 7.5 g/dL) equivalent to liberal strategy (Hgb < 9.5 g/dL if in ICU, 8.5 g/dL not in ICU) 6 months after cardiac surgery[31]

* myocardial infarction occurs less commonly in transfused post surgical patients cohort (4% vs 7%)[20]

* no consensus on what defines conservative transfusion threshold

Laboratory

Procedure

large bore peripheral intravenous access if large volumes of blood & crystalloid are needed quickly[2]

use the minimum number of units needed to relieve symptoms

the goal in stable, non-cardiac patients is a hemoglobin of 7 to 8 g/dL[10]

normal saline (0.9%) is the only IV solution to be used with a blood transfusion

An RN must start the infusion

Another person must verify the patient's identity

  • an MD, an RN or an LPN

Vital signs must be checked

  • before the transfusion starts
  • 15 minutes after transfusion starts
  • hourly until the transfusion is complete
  • 15 minutes post completion of transfusion

Transfusion of blood must be initiated within 30 minutes of release from the blood bank

Transfusion of 1st 50 mL of blood over a period of 15 minutes, remainder should be tranfused in < 3-4 hours

Verification prior to starting transfusion:

  • patient's id
  • patient's ABO type
  • patient's RH type
  • transfusion number

Patients may be observed for transfusion reactions by

  • RN, LPN, nursing assistant

The development of fever during transfusion requires the tranfusion be stopped until a hemolytic reaction can be ruled out[2]

Prophylaxis

Complications

Notes

  • also see blood donation
  • blood products transfused to patients with stem cell transplantation should be irradiated to prevent graft vs host disease[2]
  • ICU patient survival unaffected by the age of transfused blood[17]
  • AABB recommends using standard-issue blood rather than limiting transfusions to fresher blood (<10 days' storage)[25]
  • organ dysfunction after cardiac surgery unaffected by the age of transfused packed RBC[18]
  • fresh packed red blood cells no better than those stored for longer period of time[26]
  • receipt of blood transfusion from an ever-pregnant female donor, compared with a male donor, associated with increased all-cause mortality among male recipients (RR=1.13) but not among female recipients (RR=0.99)[29]
  • receipt of bllod ransfusions from never-pregnant female donor is not associated with increased mortality among male or female recipients[29]
  • factors influencing blood hemoglobin increases after transfusion[36]
    • larger hemoglobin increments observed in recipients of male-donor units vs female-donor units
    • larger hemoglobin increases in recipients of whole-blood-derived units compared with apheresis-derived units
    • donor- or recipient-positive RhD status associated with increased hemoglobin increments
    • donor age > 70 years & RBC storage durations > 35 days associated with decreased hemoglobin increment 24 & 48 hours after transfusion
    • irradiation results in smaller hemoglobin increments after transfusion
    • characteristics additive: lowest increments observed in recipients of irradiated or apheresis-derived units from female donors[36]

More general terms

More specific terms

Additional terms

References

  1. Saunders Manual of Medical Practice, Rakel (ed), WB Saunders, Philadelphia, 1996, pg 613-616
  2. 2.00 2.01 2.02 2.03 2.04 2.05 2.06 2.07 2.08 2.09 2.10 2.11 2.12 2.13 2.14 2.15 2.16 2.17 2.18 2.19 Medical Knowledge Self Assessment Program (MKSAP) 14, 15, 16, 17, 18, 19. American College of Physicians, Philadelphia 2006, 2009, 2012, 2015, 2018, 2022
  3. Veterans Administration
  4. [No authors listed] Practice guidelines for perioperative blood transfusion and adjuvant therapies: an updated report by the american society of anesthesiologists task force on perioperative blood transfusion and adjuvant therapies. Anesthesiology. 2006 Jul;105(1):198-208. No abstract available. PMID: https://www.ncbi.nlm.nih.gov/pubmed/16810012 corresponding NGC guideline updated Feb 2016 http://www.anesthesiology.org/pt/re/anes/fulltext.00000542-200607000-00030.htm
  5. 5.0 5.1 Carson JL et al Red Blood Cell Transfusion: A Clinical Practice Guideline From the AABB Annals of Internal Medicine, March 26, 2012 <PubMed> PMID: https://www.ncbi.nlm.nih.gov/pubmed/22454395 <Internet> http://www.annals.org/content/early/2012/03/26/0003-4819-156-12-201206190-00429.full corresponding NGC guideline withdrawn June 2017
    Vincent JL Indications for Blood Transfusions: Too Complex to Base on a Single Number? Annals of Internal Medicine, March 26, 2012 <PubMed> PMID: https://www.ncbi.nlm.nih.gov/pubmed/22454394 <Internet> http://www.annals.org/content/early/2012/03/26/0003-4819-156-12-201206190-00431
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