RESUMEN
Introduction: Acquired bleeding disorders are a major causeof mortality, both in the developed and developing countries.An acute haemorrhage should be managed immediately withblood products, factor concentrates or anti-fibrinolytics.Investigations to detect coagulopathies typically includebaseline screening tests like prothrombin time, activatedpartial thromboplastin time, platelet count and fibrinogenlevel. These tests have a long turn around time whichfrequently lead to a blinded approach towards blood productsupport leading to under or over transfusion. In contrast,rotational thromboelastometry (ROTEM) which assesseshaemostasis from the start of clot formation to fibrinolysisgives earliest results within ten minutes. This study wasdone to establish a correlation between ROTEM parametersand standard coagulation profile in the context of acquiredbleeding disorders.Material and Methods: A total of 138 subjects - 70 patientswho presented with acquired bleeding disorders and 68 subjectsdiagnosed to be normal on the basis of a complete coagulationwork up were included as the cases and controls respectively.All samples were subjected to standard coagulation profileand ROTEM analysis which included Clotting Time, ClotFormation Time, Alpha Angle, Maximum Clot Firmness andMaximum Lysis.Results: The Maximum Clot Firmness had a very goodco relation with serum fibrinogen levels (k value - 0.807;p<0.000; Sensitivity - 88%; Specificity - 92%), and goodcorrelation with platelet count (k value - 0.793; p< 0.000;Sensitivity - 86%, Specificity-92%), whereas Clot FormationTime showed moderate correlation with aPTT. Clotting timehad a poor correlation with prothrombin time and activatedpartial thromboplastin time.Conclusion: The achievement of haemostasis is a crucialfactor for determining patient outcomes in acquired bleedingdisorders. The gold standard test to diagnose coagulopathy is thestandard coagulation profile. Rotational thromboelastometrycorrelates well with standard coagulation parameters. Thistest which is performed on whole blood showed interpretableresults within 10 minutes, whereas standard coagulationprofile required an average of 45 – 75 minutes. In view of thegood correlation to the standard coagulation profile, it appearsthat Rotational Thromboelastometry results can be safely usedto implement early transfusion therapy for haemorrhage.
RESUMEN
BACKGROUND: The donor selection criteria should ensure the safety of both the donors and the recipients of blood products. However, modifications may help promote more blood donors in keeping with the rapidly aging Korean population. Our goal was to gather opinions of the medical staff at blood centers on the current donor selection criteria. METHODS: A survey was sent out via email to 55 medical staff at hospital blood banks, the Korean Red Cross and Hanmaeum blood centers. The survey included 14~16 questions regarding age, weight, donation volume, donation interval and frequency, hemoglobin, blood pressure, pulse rate, and the level of alanine aminotransferase (ALT). RESULTS: Survey responses from 38 out of 55 (69.1%) medical staff were analyzed. The donor selection criteria that showed significantly higher acceptable rates included the upper age limit (71%, P=0.009) and whole blood donation frequency and intervals (68%, P=0.023). The ALT level showed the highest unacceptable rate (84%, P<0.0001) and other criteria with significantly higher unacceptable rates included donor weight (68%, P=0.023) and donation volume (76%, P=0.001). Responses from medical staff at supply blood banks and hospital blood banks showed a significant difference regarding the use of parent/guardian consent forms in blood donors that were 16 years or younger (75% versus 41%, respectively; P=0.0368). CONCLUSION: This study outlines the perspectives of medical staff at blood centers regarding the current donor selection criteria. According to the survey, the ALT level, donor weight, and donation volume should be considered for revision. These results can be referenced in the future when proposing modifications to the donor selection criteria.