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We audited the appropriateness of blood ordering in our obstetric unit, by analysing the ratio of number of units of blood cross-matched to number transfused (C:T ratio), both overall and for specific indications. Based on this information, we devised a new blood ordering policy, and repeated the audit once this was in operation. The new policy resulted in a substantial increase in the efficiency of blood ordering. The overall C:T ratio fell from 10.9 to 3.0, and there were particularly large falls for caesarean section (from 34.3 to 6.2), high risk labours (from 67.8 to 9.1) and post-partum haemorrhage/retained placenta (from 4.3 to 1.9). |
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