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General Orthopaedics

Fatal pulmonary embolism following elective total knee replacement: a 10 year study

British Orthopaedic Association 2012 Annual Congress



Abstract

Aim

To assess the incidence of fatal pulmonary embolism (PE) following elective total knee replacement (TKR) with a standardised multi-modal prophylaxis regime in a large teaching DGH over a 10 year period.

Material and methods

Information was gathered from a prospective audit database, utilising clinical coding for TKR and those that had died within 42 and 90 days. The 10 years from April 2000 were analysed to establish both 42 and 90 day mortality rates.

A multi-modal prophylaxis regime for all patients included regional anaesthesia (when possible), mechanical prophylaxis (Flo-tron calf garment per-operatively, AV impulse boots until mobile and anti-embolism stockings for 6 weeks), mobilisation within 24 hours and 75mg aspirin for 4 weeks.

A case note review was performed to ascertain the causes of death. Where a patient had been referred to the coroner, the coroner's office was contacted for PM results.

Results

There were 6,584 cases; the mortality rates at 42 and 90 days were 0.36 and 0.52%. There were no fatal PE's within 42 days of surgery. 2 fatal PE's occurred subsequently at 48 and 57 days (0.03%) The leading causes of death were myocardial infarction and cerebro-vascular accident.

Conclusion

Fatal pulmonary embolus following elective TKR with a multi-modal prophylaxis regime is not a significant cause of mortality.