Introduction: The return of haemoglobin (Hb) to preoperative levels at 1–6 months following elective lower limb joint arthroplasty is well documented. Previous reports have suggested in healthy, elective patients there is no significant improvement in Hb levels following iron supplementation compared with placebo. There may also be unpleasant side effects. However, there is little published on this topic in the elderly population who suffer a femoral neck fracture and undergo emergency surgery, and often have poorer iron reserves.

Methods: We examined the blood results and discharge prescriptions of consecutive patients who underwent femoral neck fracture surgery at our institute in a 12 month period. Patients who had received a blood transfusion were excluded. 82 patients remained. Normal Hb levels at the time of surgery and 1–6 months post-operatively (late Hb) were collected.

Results: Thirteen patients (16%) were prescribed iron supplementation on discharge. No patients who went on to receive iron had a normal Hb (11.5 – 15.5g/dL in females, 13– 8g/dL in males) immediately following surgery (mean Hb 9.17g/dL) compared with 26% (mean Hb 10.41g/dL) in those who received no iron. At 115.2 days (range 28–284) following surgery 88.9% of patients prescribed iron had a normal Hb compared with only 48.1% of those who received no treatment (P=0.0167).

Discussion: The low level of iron prescribing was surprising, and may be the result of published evidence in elective patients. Our numbers are small, but we show a statistically significant difference which warrants further investigation. We suggest that, unlike the younger, healthier elective arthroplasty patients, femoral neck fracture patients may benefit from dietary iron supplement.