There were 22 patients with cerebral palsy aged six to 17 years who underwent an acetabuloplasty as part of an open reduction of the hip. In 11 patients a paediatric cell saver was used to collect autologous blood which was re-infused per-operatively. This group was compared to a cohort of 11 patients undergoing similar operations in whom only banked homologous blood was transfused. On average, 432 ml of autologous blood was re-infused compared to 909 ml of homologous blood (p < 0.01), representing 19.6% and 47% of the total blood volume, respectively (p < 0.002). Two units of homologous blood were transfused in the cell saver group compared with 20 units in the control group (p < 0.001). When using a paediatric cell saver, homologous blood transfusion was avoided in 82% of patients and there were no complications