Causes of Thrombocytopenia in dogs ? a retrospective study of 123 cases The purpose of this retrospective case study was to determine which diseases are associated with Thrombocytopenia in Swedish dogs. Records of 123 dogs with Thrombocytopenia were evaluated. The most common cause was neoplasia-associated Thrombocytopenia (32%). The largest proportion within this group was unspecified neoplasia.

 Conclusion:Medical treatment may have a role in platelet count after transfusion. Since the TACSI platelets passed the quality requirements, and the vast majority of patients platelet count increased after TACSI platelet transfusion, the TACSI platelets will replace the old method to produce platelets at the Uppsala University hospital.  Methods: A new approach that pools 8 buffy coats (TACSI platelets) that were separated into 2 units instead of 4-6 buffy coats pooled to 1 unit was investigated in this study. After the platelets were extracted from the buffy coats their quality was controlled and subsequently the platelet product was evaluated in 96 patients. Results: The results showed that 80 % of the platelet units passed the European quality requirements. Further, the platelet count was increased in most patients that received TACSI platelets. Conclusion: Medical treatment may have a role in platelet count after transfusion.

Platelet transfusions can be necessary during treatment of patients with Thrombocytopenia or impaired platelet function. Platelet function in platelet concentrates (PC) deteriorate with storage time. Studying swirling is often used to control the quality of PC?s before transfusion but the method has some disadvantages. Therefore other methods can be useful, for example impedance aggregometry (IA, Multiplate® Analyzer) to measure platelet function.     In this study the change in platelet function over time was examined in buffy coat and apheresis platelets with IA where aggregation had been induced with adenosine diphosphate (ADP) and collagen.

Platelet aggregation is a major and common problem in blood samples from cats. This greatly affects the accuracy of counting of the platelets. Because of the difficulties in counting feline platelets, results for patients and reliable reference values for cat platelets are currently so inaccurate as to be almost useless in diagnosis of Thrombocytopenia. In this study we used an effective method to prevent platelet aggregation. Blood was collected in CTAD test tubes and prostaglandin E1 was added to the blood sample.

Immune-mediated haemolytic anaemia (IMHA) is an immune-mediated destruction of erythrocytes and is one of the most common haematological diseases diagnosed in dogs. The haemolysis is a type II immunoreaction and is initiated by IgG or IgM antibodies or complements. This retrospective study includes 63 dogs suffering from primary IMHA. The study was based on information from records from the Swedish University of Agricultural Sciences, Department of Small Animal Clinical Sciences in Uppsala and from the Animal Hospital in Strömsholm. The aim of the study was to evaluate the progress of the disease, treatment and the prognostic factors in different breeds, gender and age. Following criteria were used for the dogs to be allowed in the study: the dogs were diagnosed with anaemia, the anaemia was regenerative and autoagglutination and/or spherocytes were seen in the blood. About 50 % of the dogs in the study were diagnosed with IMHA within 2-6 years of age. Wire-haired dachshund was remarkably one of the most common breeds in this study together with Cocker and Springer spaniel.

Immunmedierad trombocytopeni (IMT) är en vanlig rubbning i primära hemostasen och uppstår som en konsekvens av för tidig destruktion av trombocyter (blodplättar). Denna destruktion beror på en ökad produktion av trombocytbundna antikroppar (platelet-bound antibodies, PBA) som binder in till antigen i trombocytväggen. Antikroppsproduktionen, som är en immunologisk process, kan dels uppstå spontant genom en autoimmun reaktion (primär IMT), eller triggas av infektioner eller neoplasier (sekundär IMT). Diagnosticering av IMT, och då syftas framför allt på primär IMT, sker främst utifrån uteslutande av andra bakomliggande orsaker, då en specifik diagnostisk metod inte finns tillgänglig. Tester för att påvisa PBA finns, men deras betydelse för både diagnostik och prognos har länge varit oklar. Denna uppsats syftar till att sammanfatta forskning som finns tillgänglig om betydelsen av påvisande av PBA vid IMT, men även forskning kring den immunologiska bakgrunden till sjukdomen.