Transfusion therapy in elective total hip arthroplasty

Incorporating the concept of overtransfusion into hemovigilance monitoring: An expert-based definition and criteria from the International HIT-OVER Forum

BACKGROUND

Liberal or overtransfusion (OT) may be regarded as "inappropriate," but it is not reported as a transfusion-related adverse event. A definition of OT is lacking. OT may include overdosing of components, giving the incorrect component, or unnecessary administration without evidence of need for transfusion. OT can be associated with hypercoagulability, thrombosis, alloimmunization, increased mortality, longer hospital stay, increased infection rates, and adverse cardiocirculatory events.

STUDY DESIGN AND METHODS

In 2023, an expert panel formed a hemovigilance international taskforce embedded in the German Interdisciplinary Taskforce for Clinical Hemotherapy (IAKH). The group was charged with proposing simple criteria to be used by hemovigilance systems to document instances of OT.

RESULTS

This international initiative combined a narrative review of the literature for the rate and outcomes of OT with transfusion error reports to propose a definition for OT, including a definition for transfusion-induced hypercoagulopathy (TIH), three new codes for OT/TIH and subcodes A to G, three severity categories (serious adverse event, adverse event, near miss), and four incident codes (definite, probable, possible, not determinable). These codes can be used by hemovigilance systems to appropriately document instances of OT.

CONCLUSIONS

Global adoption of these codes within hemovigilance systems would assist with the recognition and reporting of instances of OT, promote effective policies for adequate clinical administration techniques, and support technical guidelines for avoidance of OT. Thereby, incorporation of OT into hemovigilance strategies could support adequate use of blood products, increase patient safety, and facilitate blood supply and availability.

Role of quality assessment in improving red blood cell transfusion practice

A prospective analysis of perioperative red blood cell transfusion practice in 110 patients undergoing elective primary total hip arthroplasty was conducted as a part of a quality assessment programme at the National Orthopaedic Hospital. In addition to demographic and clinical data, blood loss and perioperative transfusions were also recorded. Blood was collected for evaluation of haematocrit levels at predetermined intervals (preoperative and 6 h, 1, 2, 3, 7 days, postoperatively). Blood transfused with the patient's haematocrit of more than 30 per cent was considered inappropriate. In addition, a discharge haematocrit exceeding 36 per cent was chosen to identify overtransfusion. Eighty-four per cent were transfused a total of 191 units of homologous blood. Only 4 units were transfused between 3 patients, intraoperatively. All intraoperative transfusions were appropriate. Using the preset criteria (i.e. blood transfused with haematocrit of more than 30 per cent), 36 per cent of total units transfused were inappropriate. Using the criterion of discharge haematocrit of more than 36 per cent, 24 per cent of the patients were overtransfused. As compared to a previous retrospective analysis of blood transfusion in the same patient population which showed that inappropriate transfusion occurred in 45 per cent of the patients, the results from this study suggest a trend towards a more conservative transfusion practice. The improvement in transfusion practice may be due to the ongoing quality assurance programme and the use of transfusion guidelines.