Abstract
Background
Cauda equina syndrome (CES) is a spinal condition requiring emergency spinal surgery once diagnosed. The patient-reported symptoms are often subtle and none have been shown to be sensitive or specific in confirming CES. Magnetic resonance image (MRI) is the diagnostic gold standard, and guidelines recommend MRI access within 24-hours of symptom presentation. Limited sequence MRI scans (sagittal T2 sequences of the whole spine) have been shown to successfully identify patients with scan-positive CES despite reducing the duration of an MRI. The aim of this audit was to examine utilisation of same-day MRI requests by spinal practitioners from a newly operational same-day emergency care spinal unit over the two-year period.
Methods and results
Data was routinely collected over the two-year period and retrospectively reviewed. Data extraction occurred for cases of suspected CES with a same-day scan. Data extraction included type of MRI scan (lumbar/ whole spine/ CES protocol); outcome (admission/ discharge); final diagnosis. After clinical examination, only 258 (24% of 1085) suspected CES cases were identified and scanned within 24 hours, 58% (n=149) of which were with CES limited sequence scans. Only 12% (n=30) demonstrated scan- positive CES resulting in surgery within 24-hours. MRI same-day requests increased between 2020 (n=81, 21%) and 2021 (n=177, 26%), although utilisation of limited sequence scans improved (n=39, 48% in 2020; n=109, 62% in 2021).
Conclusion
Limited sequence MRI scans are a time- and cost-saving means of providing screening for those with suspected CES. Improved utility was demonstrated over the 2-year period by the spinal practitioners.
Conflicts of interest: No conflicts of interest
Sources of funding: No sources of funding
