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FATAL PULMONARY EMBOLISM AND DEATH RATES AFTER PRIMARY TOTAL HIP REPLACEMENT IN A JOINT REPLACEMENT CENTRE

24 Wycombe House, Grendon Street, London NW8 8SN

Fatal pulmonary embolism (PE) after total hip replacement (THR) is a major concern to all orthopaedic surgeons. Our intention was to ascertain death rates and deaths due to PE following total hip replacement where chemical thromboprophylaxis was not used routinely.

We determined retrospectively, the postoperative mortality and fatal pulmonary embolism rates in 1671 consecutive primary total hop replacements in 1547 patients performed as staged procedures between January 1997 and April 2000 at an orthopaedic hospital. The minimum follow-up period was six weeks period after surgery at an orthopaedic hospital. Patients were traced by questionnaires, outpatient appointments and by telephone. Post-mortem records were used to verify cause of death. Follow-up was 100%. The death rate from PE was 0. 12% (CI 0. 03% – 0. 44%) and the all-cause mortality rate was 0. 36% (CI 0. 16% – 0. 78%). All deaths were within the first 10 days during the initial hospital stay. The patient mortality was compared with the population mortality for England and Wales, using standardised mortality ratios (SMRs). The SMR for both sexes combined was 0. 81. We observed a lower mortality in females (SMR=0. 43) but a higher mortality in males (SMR=1. 44) during the first 42 postoperative days compared to the general population.

Fatal PE after THR without routine chemical thromboprophylaxis is very uncommon. The death rate in patients undergoing THR appears to be lower than that in the general population.

The abstracts were prepared by Mr Simon Donell. Correspondence should be addressed to him at the Department of Orthopaedics, Norfolk & Norwich Hospital, Level 4, Centre Block, Colney Lane, Norwich NR4 7UY, United Kingdom