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2021 ISFM Consensus Guidelines on the Collection and Administration of Blood and Blood Products in Cats
Samantha Taylor1, Eva Spada2, Mary Beth Callan3
1International Society of Feline Medicine, Tisbury, UK.
Insights
Feline blood transfusions are vital for treating anemia and coagulopathies but require careful donor selection and recipient matching to prevent adverse reactions. Proper blood typing, cross-matching, and monitoring are essential for safe and effective feline transfusions.
Area of Science:
- Veterinary Medicine
- Hematology
- Immunology
Background:
- Blood products are increasingly utilized in veterinary medicine for managing feline hematological conditions like anemia and coagulopathies.
- Feline blood transfusions, while life-saving, carry risks including transfusion reactions and disease transmission due to naturally occurring alloantibodies.
- Appropriate donor selection and recipient matching are critical to maximize benefits and minimize complications.
Purpose of the Study:
- To provide general practitioners with practical guidelines for feline blood transfusion procedures.
- To outline best practices for feline blood typing, cross-matching, and transfusion administration.
- To emphasize the importance of donor health, blood type compatibility, and monitoring for safe transfusion outcomes.
Main Methods:
- Guidelines developed by a panel of experts convened by the International Society of Feline Medicine (ISFM).
- Based on a comprehensive review of available scientific literature on feline transfusion medicine.
- Focus on practical application for general veterinary practitioners.
Main Results:
- Cats possess naturally occurring alloantibodies, necessitating careful blood type compatibility assessments.
- Severe transfusion reactions can occur with type-mismatched transfusions, highlighting the importance of cross-matching.
- Donor screening for infectious agents and ensuring donor health are crucial to prevent disease transmission and optimize outcomes.
Conclusions:
- Careful donor selection, recipient matching, and understanding blood type compatibility are paramount for successful feline blood transfusions.
- Adherence to guidelines for blood collection, administration, and monitoring can largely prevent transfusion complications.
- Autologous and xenotransfusions may be considered as alternative options in specific clinical scenarios.
Practical Relevance:
Blood and blood products are increasingly available for practitioners to use in the management of haematological conditions, and can be lifesaving and therapeutically useful for patients with anaemia and/or coagulopathies. It is important for feline healthcare that donors are selected appropriately, and transfusions of blood or blood products are given to recipients that will benefit from them. Complications can occur, but can be largely avoided with careful donor management and recipient selection, understanding of blood type compatibility, and transfusion monitoring.
Clinical Challenges:
Feline blood transfusion, while potentially a lifesaving procedure, can also be detrimental to donor and recipient without precautions. Cats have naturally occurring alloantibodies to red cell antigens and severe reactions can occur with type-mismatched transfusions. Blood transfusions can also transmit infectious agents to the recipient, so donor testing is essential. Finally, donors must be in good health, and sedated as appropriate, with blood collected in a safe and sterile fashion to optimise the benefit to recipients. Transfusion reactions are possible and can be mild to severe in nature. Autologous blood transfusions and xenotransfusions may be considered in certain situations.
Evidence Base:
These Guidelines have been created by a panel of authors convened by the International Society of Feline Medicine (ISFM), based on available literature. They are aimed at general practitioners to provide a practical guide to blood typing, cross-matching, and blood collection and administration.
