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General Orthopaedics

EVALUATION OF THE CURRENT TRENDS AND MANAGEMENT OF SPINAL INFECTION

European Bone and Joint Infection Society (EBJIS) meeting (1–3 September 2016).



Abstract

Aim

Spondylodiscitis and vertebral osteomyelitis can lead to long-term sequelae if not diagnosed and treated promptly and appropriately. The Royal National Orthopaedic Hospital (RNOH) has devised a new spinal infection referral system within the UK that allows cases to be discussed in a specialist multi-disciplinary (MDT) forum. National guidelines were devised in 2013 to help guide treatment, which recommends both tissue biopsies from the affected region and a MRI of the entire spine. The aims of this study were to assess the current treatment and referral practices and compare them with the set guidelines. It is hypothesised that a high percentage of patients are started on antibiotics without a biopsy or a positive set of blood cultures, a low percentage of patients are referred without undergoing a MRI of the full spine and that there is a long delay in referral to the MDT.

Method

A retrospective case study analysis was carried out on all spinal infection referrals received by the Royal National Orthopaedic Hospital over a 2-year period (2014–16), using the standards set by the current national guidelines. Clinical features, haematology results, imaging, biopsy results, treatment and outcome were all reviewed. Three key areas were addressed; whether antibiotics were commenced before positive cultures or biopsy, whether a MRI of the entire spine was performed and the time taken for referral from the onset of symptoms.

Results

A total of 49 cases were identified, the average age was 56 years and the majority were male (67%). The most common organisms grown were staphylococcus aureus and mycobacterium tuberculosis. Lumbar (37%) and thoracic (31%) spine were the most predominant regions affected. As predicted only 42% of the patients were referred with a whole spine MRI, only 33% had a biopsy and 29% had positive blood cultures before starting antibiotics. The average time to referral was 62 days overall (10 days for acute referrals).

Conclusions

This multicentre study highlights a number of key concerns with both the referral and treatment of spinal infections. New national infection guidelines recommend a tissue sample prior to antibiotics; however this study showed that only 45% of patients had either a biopsy or positive blood culture before starting antibiotics. The time to referral was prolonged and the majority of patients did not receive a whole spine MRI. Overall this confirms the study's hypothesis and the need for better management of this complex and debilitating condition.


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