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FACTORS INFLUENCING LENGTH OF STAY AFTER PRIMARY TOTAL HIP REPLACEMENT: THE ROLE OF ANAESTHESIA AND THE ANAESTHETIST



Abstract

Introduction: Although there are a number of publications in the literature on managing post-operative pain and early rehabilitation after surgery in general, there has been little work on the influence of anaesthetic technique on the post-operative length of hospital stay following primary total hip replacement (THR). We wished to particularly study the influence of anaesthetic technique and the anaesthetist concerned on the length of hospital stay, as well as the effect of age and body mass index (BMI).

Methods: We studied 121 consecutive THRs in 109 patients. All procedures were performed by the same surgeon using the same posterolateral approach, prosthetic design and the same physiotherapy protocol. Patients received either general anaesthesia alone (50 THRs) or a combination of general and local anaesthesia (lumbar plexus block; 71 THRs) from three separate anaesthetists. The influence of anaesthetist, anaesthetic technique, age, and BMI on length of stay after primary THR was assessed separately.

Results: Our analysis showed that the length of hospital stay was greatly influenced by the anaesthetic technique used (p < 0.0001), those patients who received a lumbar plexus block having a shorter median length of hospital stay (3 days) than those who received general anaesthesia alone (5 days). The age of the patient was also critical (p = 0.003) as was the anaesthetist concerned (p = 0.01). BMI was unimportant.

Discussion: For those surgeons who believe that a reduction in the length of hospital stay after primary THR is a worthwhile objective, we have one over-riding observation – the anaesthetic technique used, and the anaesthetist involved, are critical.

Correspondence should be addressed to The Secretary, BHS, c/o BOA, The Royal College of Surgeons, 35–43 Lincoln’s Inn Fields, London WC2A 3PE.