Abstract
The hospital transfusion committee of Swindon and Marlborough NHS Trust had formulated a maximum surgical blood ordering schedule (MSBOS) which included the standard practice of 6 units of blood for revision hip arthroplasty. A retrospective audit of 73 patients who underwent revision hip arthroplasty over a year was undertaken to identify current practice and to ensure that the standard was adequate for patient safety. Information regarding the number of units requested, number of units transfused, pre-operative haemoglobin (Hb), lowest postoperative Hb and number of additional units of blood requested within 3 days postoperatively, was collected from patients' case-notes. Of the 73 patients, 80.3% received less than 6 units, 12.2% received 6 units and 7.5% received more than 6 units. Based on pre-operative Hb, blood usage was analysed. Of cross-matched units, 92.3% were used when pre-operative Hb was < 12 g/dl, 64.4% were used when Hb was between 12.1-13.0 g/dl, 54.3% were used when the Hb was between 13.1-14.0 g/dl, 38.9% were used when Hb was between 14.1-15.0 g/dl and 39.7% used with pre-operative Hb of > 15.0 g/dl. Of the total, 14 patients had a postoperative Hb of < 9 g/dl for whom additional units of blood were ordered and given to achieve a Hb of between 10.1-14.2 g/dl prior to discharge. This audit suggests that in patients with pre-operative Hb of 13 g/dl or more, the cross-match could be 4 units instead of 6 units for revisions.
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