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  • Title: [Spinal cord concussion: a retrospective study of twenty-four patients].
    Author: Nesnídal P, Stulík J, Barna M.
    Journal: Acta Chir Orthop Traumatol Cech; 2012; 79(2):150-5. PubMed ID: 22538107.
    Abstract:
    PURPOSE OF THE STUDY: Spinal cord concussion is characterised as fully reversible, temporary inhibition of conductive function due to trauma, without signs of structural changes. Although neurological deficit is usually related to the severity of spinal injury, this is different in spinal cord concussion. The aim of this retrospective study was to evaluate a group of 24 patients with spinal cord concussion, to design a diagnostic algorithm and propose an effective therapy with a good prognosis for the patients. MATERIAL: We reviewed clinical records of 9 768 patients hospitalised at the Department of Spinal Surgery, University Hospital in Motol, from September 2002 till December 2010, and of 457 patients treated at other departments of the Hospital between January 2008 and December 2010; this was a total of 10 225 patients. The data were retrospectively analysed and only the patients with a clear history of trauma and subsequent conservative therapy were selected to comprise a group characterised by the generally known criteria of spinal cord concussion: (1) spinal injury with immediate neurological deficit of varying degree; (2) neurological deficit corresponding to the level of spinal injury; (3) recovery of neurological function within 72 hours of injury; (4) no morphological evidence of injury to the spinal structures obtained by imaging methods. This group comprised 24 patients. METHODS: The patients were followed up from 6 to 95 months, with a mean of 46 months and a median of 48 months, at intervals of 6 and 12 weeks and 6 and 12 months after injury, and then every following year. The recorded information included the patient's age at the time of injury, their gender, the mechanism of injury, reports on alcohol consumption, the first detected neurological deficit, its development immediately after injury, during the hospital stay and at follow-ups in the out-patient department, methylprednisolone administration according to the National Acute Spinal Cord Injury Study (NASCIS) 2, and findings of imaging methods, particularly MRI. RESULTS: Our group consisted of 22 men (91.7%) and two women (8.3%), with an average age of 29 years; the average age was 30 years in men and 18.5 years in women. Seven patients (29.2%) were younger than 18 years, with an average of 16.14 years; the remaining 17 patients (70.8%) were older than 18 years, with an average of 34.35 years. The major mechanisms of injury included falls from a height in 10 patients (41.7%) and injury due to alcohol consumption in five patients (20.1%). Clinical findings involved lesions of the medullary cone in 12 (50.0%), cervical spinal cord in seven (29.2%) and thoracic spinal cord in five (20.8%) patients. Motor function deficit was present in all patients, of whom 10 (41.2%) showed a complete loss of motor function. Impaired sensory function was found in 21 (87.5%) patients. One patient had perianal and genital sensory deficit and one (4.2%) had urinary retention. Neither radiograms nor CT scans showed traumatic changes in any of the patients; MRI findings free of any traumatic spinal changes were recorded in 21 patients (87.5%). One patient had oedema of the T5 and T8 vertebral bodies. No complications were recorded. All patients experienced rapid resolution of neurological deficit, which occurred within 6 hours of injury in two (8.4%), within 12 hours in two (8.4%), within 24 hours in 12 (50.0%) and within 48 hours in six (25.0%) patients, and later than 48 hours after injury in two patients (8.4%). However, recovery always occurred within 72 hours of injury. DISCUSSION: A good prognosis for patients with this injury is supported by our findings, because all patients experienced rapid resolution of neurological deficit within 72 hours of injury. This result is in agreement with the relevant international studies reporting no serious complications associated with spinal trauma. There are no clear recommendations for administration of high doses of methylprednisolone according to the NASCIS system. CONCLUSIONS: Spinal cord concussion is not a frequent injury; in our study, it accounted for 3.54% of the patients with trauma histories out of the total number of 678 patients, or for 2.40% out of 997 injured spinal levels. The first steps should be the same as in any other injury to the spinal cord. An early examination of the patient with imaging methods including MRI is of primary importance. At present administration of methylprednisolone according to the NASCIS system is disputable. The patient diagnosed with spinal cord concussion has a good prognosis, with rehabilitation as the main therapeutic approach.
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