Introduction: (1) Determine whether initial MRI findings correlate with clinical outcome.(2) Study the reproducibility of MRI measurements of large disc prolapses.(3) Estimate the ability to predict CES based on MRI alone.(4) Does CES only occur in degenerate discs?

Method: 31 patients with CES were identified and invited to attend clinic. 19 patients who underwent discectomy were identified. Digital photographs of all 50 MRIs were obtained. Observers: 1 Radiologist, 2 Spinal Surgeons and 1 Trainee did not know the number of patients in each group. Observers estimated the percentage spinal canal compromise on each view (0–100%), indicated whether they thought the scan findings could produce CES and commented on disc degeneration. Measurements were repeated after 2 weeks.

Results: 26 patients attended clinic – mean follow up 51 months (range 25–97). 12 of the 26 patients with CES had, on average, > 75% canal compromise. No significant correlations were found between MRI canal compromise and clinical outcome. Kappa values for intra-observer reproducibility of measurements ranged from 0.4–0.85 and inter-observer 0.63–5. Based on MRI, the correct identification of CES has sensitivity 68%, specificity 78%, positive predictive value 84% and negative predictive value 58%. Over 80% of the CES causing discs were degenerate.

Discussion: Canal compromise does not appear to predict clinical outcome. MRI measurement reproducibility has substantial agreement. CES is a clinical diagnosis supported by an MRI scan. In less clear cases the presence of a large disc on an MRI scan supports a diagnosis of CES (PPV 84%). CES occurs in degenerate discs.

Background: There has been an exponential rise in Internet use over recent years with over 11 million homes in the United Kingdom currently having access to the Internet. Previous studies have shown that up to 50% of orthopaedic outpatients have researched their condition on the Internet and that this percentage is dependent upon the condition from which they are suffering. The aim of our study was therefore to assess the prevalence of Internet usage among three groups of orthopaedic outpatients and to further determine how the patients felt their Internet research compared to the information received at consultation.

Methods: Data was collected from 150 patients / parents attending three outpatient clinics; 50 consecutive patients attending scoliosis clinic; 50 patients attending paediatric orthopaedic clinic; 50 patients attending back pain clinic.

Results: 58% of scoliosis, 22% of general paediatric and 30% of back pain patients had researched their condition on the Internet. 83% of scoliosis, 64% of paediatric and 80% of back pain patients found this information useful. Nearly all patients, however, would trust their doctor more than the Internet.

Conclusion: We believe therefore that clinicians need to keep up to date with information available on the Inter-net and provide recommended websites to patients wishing to consolidate their knowledge of their condition.

Introduction: Current evidence suggests that CES should be operated within 48 hours from onset of sphincteric symptoms in order to maximise chances of recovery. Measurement reproducibility of large disc prolapses and clinical correlations have not previously been studied.

Objectives: (1) Determine whether initial MRI findings correlate with clinical outcome (2) Study the reproducibility of MRI measurements of large disc prolapses (3) Estimate the ability to predict CES based on MRI alone.

Study Design: 31 patients with CES were identified, the case notes reviewed and the patients invited to attend clinic. Outcome consisted of history and examination, and several validated questionnaire assessments. 19 patients who underwent discectomy for persistent radiculopathy were identified. None had sphincteric symptoms. All had a significant surgical target. Digital photographs of all 50 MRIs were obtained showing the T2 mid-sagittal image and the axial image with the greatest disc protrusion. The Observers: 1 Consultant Radiologist, 2 Consultant Spinal Surgeons and 1 SHO did not know the number of patients in each group. Observers estimated the percentage spinal canal compromise on each view and indicated whether they thought the scan findings could produce CES. Measurements were repeated after 2 weeks.

Results: 26 patients attended clinic mean follow up 51 months (25 to 97). As expected, the % canal compromise differed significantly between the two groups (p0.001). 12 of the 26 patients with CES had, on average, over75% canal compromise. No significant correlations were found between MRI canal compromise and clinical outcome. Canal compromise did predict whether the patient would fail their Trial Without Catheter (p0.05). Based on MRI alone, the correct identification of CES has sensitivity 68%, specificity 78%, positive predictive value 84% and negative predictive value 58%. Kappa values for intra-observer reproducibility ranged from 0.4 to 0.85 for sagittal compromise, axial compromise and correct prediction of CES. All three interobserver kappa values for these measurements were 0.64.

Conclusions: This is the largest radiological case series of CES with 4 years clinical follow up. Canal compromise on MRI does not appear to directly predict clinical outcome. Reproducibility of MRI measurements of large disc protrusions has substantial agreement. MRI could be of help in equivocal cases if the scan shows a large disc.

Objective: Determine factors influencing outcome after surgery for cauda equina syndrome with particular attention sphincteric recovery. Subjects:56 patients with evidence of a sphincteric disturbance who underwent urgent surgery between 1994 and 2002 were identified and invited for follow up.

Outcome Measures: History and examination, Oswestry Disability Index, Short Form 36, Visual Analogue Score, Low Back Outcome Score, Modified Somatic Perception Score, Modified Zung Depression Score, International Prostate Severity Score, Male Sexual Health Questionnaire and Sheffield Female Pelvic Floor Questionnaire.

Results: 42 patients attended with a mean follow up of 60 months (25 to 114 months). Mean age at onset was 41 years (24 to 67 years) with 23 males and 19 females. 25 patients had sudden onset of symptoms in less than 24 hours. 26 patients were operated on within 48 hours of onset. At presentation urinary retention was associated with acute onset of less than 24 hours (p0.01), leg weakness (p0.01), abnormal leg sensation (p0.05) and abnormal rectal tone (p0.05). Bilateral radiculopathy was associated with leg weakness (p0.005). All patients with abnormal rectal tone (21) had abnormal rectal sensation. At follow up significantly more females had urinary incontinence (p0.001) and bowel disturbance (p0.05), higher VAS scores (p0.05) and lower SF36 Pain and Energy scores (p0.05) than males. Urinary disturbance at presentation did not affect the outcomes. Bowel disturbance at presentation was associated with sexual problems (0.005) and abnormal rectal tone (p0.05) at follow up. Objective reduced perianal sensation at onset persisted in a significant number at follow up (21/32 patients; p0.05) as did leg weakness (14/23; p0.005). There was a weak association between delay to operation and bowel disturbance (p0.05) at follow up. Eight patients had faecal soiling and faecal incontinence at follow up and this was associated with sudden onset of symptoms, initial abnormal rectal tone and time to operation (p0.05). The SF36 scores at follow up were reduced compared to age matched norms in the population. The mean ODI was 29, LBOS 42 and VAS 4.5.

Conclusions: In our series the duration of symptoms and speed of onset prior to surgery appears to influence bowel but not bladder outcome two years after surgery. Based on the SF36, LBOS and ODI scores, patients who have had CES do not return to a normal status. Patient counselling about this would therefore be appropriate.

Introduction: Current evidence suggests CES should be operated < 48 hours from onset. MRI scanning is often not available 24 hours a day.

Objectives: (1) Determine whether MRI findings correlate with clinical outcome. (2) Study the reproducibility of MRI measurements of large disc prolapses. (3) Estimate the ability to predict CES based on MRI alone.

Study Design: 31 CES patients were identified,contactedand invited to follow up. Clinical outcome consisted of history and examination, and validated questionnaire assessments. 19 patients who underwent discectomy were identified. T2 mid-sagittal and axial digital photographs of all 50 MRIs were obtained. Observers did not know the number of patients in each group (1 Consultant Radiologist, 2 Consultant Spinal Surgeons and 1 SHO). They estimated the percentage spinal canal compromise on each view (0–100%) and indicated whether they thought the scan findings could produce CES. Measurements were repeated after 2 weeks.

Results: 26 patients attended clinic (mean follow up 51 months). There were no significant correlations found between MRI canal compromise and clinical outcome. Kappa values for the measurements ranged 0.52–0.85 and 0.61–0.75 for intra- and inter-observer reproducibility. Based on MRI alone correct identification of CES has sensitivity 67%, specificity 81%, positive predictive value 85% and negative predictive value 60%.

Conclusions: Canal compromise on MRI does not predict the outcome of patients with CES. Reproducibility of MRI measurements of large disc protrusions has substantial agreement. MRI could be of help in equivocal cases if the scan shows a large disc.

Numerous studies have examined the biomechanical properties of the vertebral body following PMMA cement augmentation for the treatment of osteoporotic vertebral body fractures. To date there is no published literature reporting the effects of Vertebroplasty on internal intervertebral disc biomechanics which in turn have been shown to reflect loading patterns of the vertebral column.

To study effects of PMMA cement augmentation of vertebral body fractures on intervertebral disc biomechanics using stress prolifometry to assess differential anterior and posterior vertebral column loading.

Eight cadaveric motion segments were individually loaded on a hydraulically powered materials testing machine under 1.5kN of axial compression. Following fracture induction the lower vertebral body underwent Vertebroplasty.

Profiles of the vertically acting compressive stress were obtained by pulling a pressure sensitive transducer along the mid-sagittal diameter of the intervertebral disc. “Stress profile” measurements were obtained before fracture, following fracture, and after vertebro-plasty both in extension and flexion.

Stress profiles were integrated over area to calculate the compressive force across the disc. The compressive load acting on the neural arch was calculated by subtracting the disc force from the applied 1.5kN load.

In flexed postures posterior column loading increased from 17.1% to 42.2% following fracture (p< 0.01) and then decreased significantly from 42.2% to 23.68% following vertebroplasty (p< 0.03). There was no significant difference between pre-fracture and post-vertebroplasty status (p=0.11). In extended posture, fracture produced increased posterior column loading 72.9% vs 51.8% (p< 0.005) and following vertebroplasty there was no significant change (p=0.2).

In moderate degrees of flexion, vertebroplasty produces normalisation of load bearing through the anterior vertebral column and hence offloads the posterior elements to a significant degree. This could be postulated, to partly account for the analgesic effect seen following vertebroplasty in the clinical setting.

The rehabilitation of elderly patients after hip fractures is important: we report a prospective study which compares supported home rehabilitation with management in hospital in two similar groups of patients. Our results show that early discharge from hospital and home rehabilitation produces substantial savings in bed days, and also provides quicker and more effective recovery.

We have reviewed 50 patients at a mean period of 2.7 years after operations to restore elbow flexion lost as a result of traction injuries of the brachial plexus. A variety of operations were used and, in general, patient satisfaction was high. Objectively, however, the power in the transferred muscles was poor; less than half of the patients had a significant improvement in function. Poor control of the shoulder often compromised the result. Latissimus dorsi and triceps transfers proved most reliable, and some Steindler flexorplasties also gave satisfactory results. Pectoralis major transfers were disappointing and we do not recommend their use in women.

Six mechanisms which may produce fracture-separation of the proximal humeral epiphysis are proposed. Four of them are illustrated by case reports. It is suggested that they may be differentiated by examination of the patient and study of the radiographs. In unstable fractures manipulation is indicated and, if performed with an understanding of the mechanism of injury, will produce a stable reduction.

Fifty-four hips converted to low friction arthroplasty between 1965 and 1975 have been reviewed one to eleven years after operation. In many cases malposition had led to degenerative changes in the opposite hip, the lumbar spine or the knee, often with severe loss of function due to pain. It was found that total replacement could give useful relief of pain and improved function, though the range of movement obtained was not as good as in primary replacement. An outstanding feature was the correction of inequality of leg length. In general, the results were much better in cases of ankylosis acquired in adult life than in cases of spontaneous fusion after sepsis in childhood. The most important complication was a single case of sciatic palsy.