Canis ISSN: 2398-2942
Anemia: transfusion indications
Synonym(s): Blood transfusion
Contributor(s): Yvonne McGrotty, Prof Bernard Feldman
Blood types
- Dogs have at least eight different blood groups called dog erythrocyte antigen (DEA) 1-7 Blood types.
- DEA-1 has two subgroups: DEA-1.1 and 1.2.
- DEA-1.1 is the most potent stimulator of isoantibody production and severe transfusion reactions may occur if a dog with DEA-1.1 antibodies is transfused with DEA-1.1-type blood.
- DEA-1.2 and -7 are the next most immunogenic blood types.
- The donor blood should preferably be DEA-1.1, -1.2 and -7 negative: but DEA-1.1 negative most important.
- An in-house test kit is available to identify DEA-1.1 positive dogs (Rapid H canine 1.1).
- Dogs often do not have naturally occurring allo-antibodies against other blood types so initial transfusion will not usually cause acute transfusion reactions.
- Subsequent mismatched transfusion may result in acute transfusion reactions with these clinical signs:
- Fever.
- Tachycardia.
- Tremors.
- Urticaria.
- Vomiting.
- Hemoglobinuria.
- Involuntary urination/defecation.
Transfusion
- Major cross-match Blood: crossmatching should be performed before transfusion of any dog that has previously (>4 days) received a transfusion.
- Stored blood should be warmed in a water bath first. In many cases blood can be administered at room temperature and this may result in less degradation of blood products.
Do not exceed 37°C.If blood is heated to >38°C hemolysis will occur.
- Blood should be given using a blood administration set with a 170 u filter to prevent clots entering the recipient.
Do not administer crystalloids containing calcium or glucose or colloids through this line.
- Transfuse slowly for 30 min (<5 ml/min) in case of transfusion reaction.
- Monitor temperature, pulse and respiration rate frequently, especially at start since increases may be indicative of transfusion reaction.
- Blood volume of a normovolemic dog is approximately 90 ml/kg.
- Transfusion rate in normovolemic dog is 1-5 ml/kg/h and no more than 22 ml/kg/day.
If cardiac failure, do not exceed 1-2 ml/kg/h.If hypovolemic, do not exceed 22 ml/kg/h.
Calculation of volume required
- 2.2 ml whole blood/kg raises the PCV Hematology: packed cell volume by 1.0%.
- Volume of donor blood required = bodyweight of recipient (kg) x 90 x ((desired PCV - PCV of recipient)/PCV of donor).
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Further Reading
Publications
Refereed papers
- Recent references from PubMed and VetMedResource.
- Giger U, Gelens C J, Callan M B et al (1995) An acute hemolytic transfusion reaction caused by dog erythrocytic antigen 1-1 incompatibility in a previously sensitized dog. JAVMA 206 (9), 1358-1362 VetMedResource.
Other sources of information
- Helm J & Knottenbelt C (2010) Blood transfusions in dogs and cats 1. Indications. In Practice 32, 184-189.
- Helm J & Knottenbelt C (2010) Blood transfusions in dogs and cats 2. Practicalities of blood collection and administration. In Practice 32, 231-237.
- Abrams-Ogg A (2000) Practical Blood Transfusion. In: Manual of Canine and Feline Haematology and Transfusion Medicine. 1st edn. Day M J, Mackin A & Littlewood J D (eds). BSAVA Publications, Gloucester, pp 263-303.
- Mills J (2000) Anaemia. In: Manual of Canine and Feline Haematology and Transfusion Medicine. 1st edn. Day M J, Mackin A & Littlewood J D (eds), BSAVA Publications, Gloucester, pp 29-42.