Surgery For Cauda Equina Syndrome Research Articles

How to assess the long-term recovery outcomes of patients with cauda equina syndrome before surgery: a retrospective cohort study.

Factors influencing recovery after decompression surgery for cauda equina syndrome (CES) are not completely identified. We aimed to investigate the most valuable predictors (MVPs) of poor postoperative recovery (PPR) in patients with CES and construct a nomogram for discerning those who will experience PPR. 356 patients with CES secondary to lumbar degenerative diseases treated at *** Hospital were randomly divided into training (N=238) and validation (N=118) cohorts at a 2:1 ratio. Moreover, 92 patients from the **** Hospital composed the testing cohort. Least Absolute Shrinkage and Selection Operator regression (LASSO) was used for selecting MVPs. The nomogram was developed by integrating coefficients of MVPs in the logistic regression, and its discrimination, calibration, and clinical utility were validated in all three cohorts. After 3 to 5 years of follow-up, the residual rates of bladder dysfunction, bowel dysfunction, sexual dysfunction, and saddle anesthesia were 41.9%, 44.1%, 63.7%, and 29.0%, respectively. MVPs included stress urinary incontinence, overactive bladder, low stream, difficult defecation, fecal incontinence, and saddle anesthesia in order. The discriminatory ability of the nomogram was up to 0.896, 0.919, and 0.848 in the training, validation, and testing cohorts, respectively. Besides, the nomogram showed good calibration and clinical utility in all cohorts. Furthermore, the optimal cut-off value of the nomogram score for distinguishing those who will experience PPR was 148.02, above which postoperative outcomes tend to be poor. The first pre-treatment nomogram for discerning CES patients who will experience PPR was developed and validated, which will aid clinicians in clinical decision-making.

Technical feasibility of combined uniportal unilateral laminotomy with bilateral decompression and interlaminar lumbar discectomy surgery for cauda equina syndrome due to lower lumbar disc herniation

BackgroundTraditionally, open wide laminectomy and discectomy have been advocated for the treatment of cauda equina syndrome caused by lumbar disc herniation. We aimed to evaluate the technical feasibility of uniportal interlaminar endoscopy in treating cauda equina syndrome. MethodsNine patients with cauda equina syndrome underwent uniportal endoscopic decompression and discectomy from December 2020 to December 2022. Data were collected retrospectively. Patients diagnosed with cauda equina syndrome were operated on within 6 hours of presentation to the hospital. The visual analogue score (VAS), Oswestry disability index (ODI), and bladder/bowel score were used to measure the outcome. ResultsAnalysis showed that VAS scores for leg pain and back pain significantly decreased from preoperative scores of 8.22±0.79 and 4.67±1.76 to postoperative day 1 scores of 0.67±0.67 and 2.56±1.42 (p<.05). The ODI scores improved from preoperative 52.33±11.93 to postoperative (day 1) 14±6.80. Eight patients had early recovery (1 week) of bladder and bowel functions, and one had delayed recovery at 8 months. None of the patients had a residual bowel/bladder deficit. Macnab's criteria outcomes were excellent in all patients at the final follow-up. ConclusionsUniportal endoscopic lumbar endoscopic unilateral laminotomy with bilateral decompression and subsequent interlaminar endoscopic lumbar discectomy is a safe and effective minimally invasive course of treatment for cauda equina syndrome as an alternative to open laminectomy in our cohort of patients.

Rehabilitation Characteristics Predicting Post-Operative Discharge Location after Surgery for Cauda Equina Syndrome: A Retrospective Analysis

Rehabilitation Characteristics Predicting Post-Operative Discharge Location after Surgery for Cauda Equina Syndrome: A Retrospective Analysis

Lumbar decompression surgery for cauda equina syndrome - comparison of complication rates between daytime and overnight operating.

To investigate the incidence of complications from lumbar decompression ± discectomy surgery for cauda equina syndrome (CES), assessing whether time of day is associated with a change in the incidence of complications. Electronic clinical and operative notes for all lumbar decompression operations undertaken at our institution for CES over a 2-year time period were retrospectively reviewed. "Overnight" surgery was defined as any surgery occurring between 18:00 and 08:00 on any day. Clinicopathological characteristics, surgical technique, and peri/post-operative complications were recorded. Multivariable logistic regression was used to calculate odds ratios (OR) and 95% confidence intervals. A total of 81 lumbar decompression operations were performed in the 2-year period and analysed. A total of 29 (36%) operations occurred overnight. Complete CES (CESR) was seen in 13 cases (16%) in total, 7 of whom underwent surgery during the day. Exactly 27 complications occurred in 24 (30%) patients. The most frequently occurring complication was a dural tear (n = 21, 26%), followed by post-operative haematoma, infection, and residual disc. Complication rates in the CESR cohort (54%) were significantly greater than in the CES incomplete (CESI) cohort (25%) (p = 0.04). On multivariable analysis, overnight surgery was independently associated with a significantly increased complication rate (OR 2.83, CI 1.02-7.89). Lumbar decompressions performed overnight for CES were more than twice as likely to suffer a complication, in comparison to those performed within daytime hours. Our study suggests that out-of-hours operating, particularly at night, must be clinically justified and should not be influenced by day-time operating capacity.

Improvement in Neurogenic Bowel and Bladder Dysfunction Following Posterior Decompression Surgery for Cauda Equina Syndrome: A Prospective Cohort Study.

ObjectiveThe mechanisms of neurogenic bowel dysfunction (NBD) and neurogenic bladder (NB), which are major consequences of spinal cord injury and occasionally degenerative lumbar disease. The following in patients with cauda equina syndrome who underwent posterior decompression surgery was investigated: (1) the preoperative prevalence of NBD and NB, measured using the Constipation Scoring System (CSS) and International Prostate Symptoms Score (IPSS); (2) the degree and timing of postoperative improvement of NBD and NB. MethodsWe administered the CSS and IPSS in 93 patients before surgery and at 1, 3, 6, and 12 months postoperatively. We prospectively examined patient characteristics, Japanese Orthopaedic Association (JOA) score, and postoperative improvements in each score. ResultsThe prevalence of symptomatic defecation and urinary symptoms at admission were 37 patients (38.1%) and 31 patients (33.3%), respectively. Among the symptomatic patients with defecation problems, 12 patients had improved at 1 month, 13 at 3 months, 14 at 6 months, and 13 at 12 months postoperatively. Among the symptomatic patients with urinary problems, 5 patients improved at 1 month, 11 at 3 months, 6 at 6 months, and 10 at 1 year postoperatively. Comparing patients with improved versus unimproved in CSS, the degree of JOA score improvement was a significant prognosis factor (p<0.05; odds ratio, 1.05). ConclusionThe prevalence of symptomatic defecation and urinary symptoms in patients with cauda equina syndrome was 38.1% and 33.3%, respectively. Decompression surgery improved symptoms in 30%–50%. These effects were first observed 1 month after the operation and persisted up to 1 year.

The morbidity of out-of-hours surgery for Cauda Equina Syndrome

Background There is no literature specifically addressing the morbidity of out of hours surgery for CaudaEquina Syndrome (CES). Our paper rectifies this omission. This will assist the surgeon with real-time decision making with regards to timing of intervention in this rare but potentially disabling disease. Methods A retrospective case series analysis. Individual cases were identified using local electronic theatre management systems in the four neurosurgical centres in Scotland in 2017. “Out of hours” surgery was defined as starting outside the times 0900-1700 Monday to Friday. Results 86 patients underwent out of hours surgery for CES in Scotland in 2017. One patient sustained a nerve root injury without new deficit, giving an overall risk of 1.2%. Four patients had the intra-operative complication of CSF leak, giving an overall risk of 4.7%. Five patients underwent early revision surgery, equivalent to a re-operation risk of 5.8%. Conclusions The morbidity of out of hours surgery for CES is comparable to that of elective microdiscectomy. Operating out of hours for CES does not appear to have an increased risk of complications. Since increased surgical risk is not borne out by our study, this should not be used as a justification to delay operative treatment.

Long-term mental wellbeing and functioning after surgery for cauda equina syndrome.

IntroductionCauda Equina Syndrome (CES) can cause persisting life-changing dysfunction. There is scarce literature regarding the long-term assessment of CES symptoms, and rarer still is the impact of these symptoms on mental wellbeing investigated. This study assessed the long-term patient reported mental wellbeing outcomes of post-operative CES patients.MethodsPatients who underwent surgery for CES between August 2013 and November 2014 were identified using an ethically approved database. They then completed validated questionnaires over the telephone assessing their mental and physical functioning (Short-Form 12 Questionnaire), generating the Physical Component Summary (PCS) and Mental Component Summary (MCS). Bladder, bowel and sexual function were also assessed using validated questionnaires. MCS scores were compared to both the Scottish mean and previously published cut-offs indicating patients at risk of depression. Correlations of MCS with bladder, bowel, sexual and physical dysfunction were examined and multifactorial regression to predict MCS from these variables analysed. Independent t-tests assessed the mean difference in MCS between patients presenting with incomplete CES (CES-I) and CES with retention (CES-R) and between those with radiologically confirmed and impending CES.ResultsForty-six participants with a mean follow-up time of 43 months completed the study. The mean (±SD) MCS was 49 (±11.8) with 22% demonstrating poor mental health related quality of life in comparison to the Scottish mean. Overall, 37% had scores consistent with being at risk for depression with in the last 30 days, and 45% within the last 12 months. MCS was significantly correlated with Urinary Symptoms Profile (USP) score (-0.608), NBDS score (-0.556), ASEX score (-0.349) and PCS score (0.413) with worse bladder, bowel, sexual and physical dysfunction associated with worse MCS score. Multifactorial regression analysis demonstrated both urinary (USP score p = 0.031) and bowel function (NBDS score p = 0.009) to be significant predictive variables of mental health related quality of life. There were no significant mean differences in MCS between those presenting with CES-I and CES-R or those with radiologically complete and impending CES.DiscussionThis study demonstrates a high frequency of being at risk for depression in patients with CES and identifies outcome measures (physical, sexual and more so bladder and bowel dysfunction) associated with poorer mental wellbeing. Our large cohort and long follow-up highlight that CES patients should be considered at risk of depression, and the need to consider mental health outcomes following CES surgery.

Long term clinical outcome following decompressive surgery for Cauda Equina Syndrome

Study design: Retrospective study with prospective long-term clinical follow-up.&#x0D; Background: Cauda equina syndrome (CES) is a neurosurgical emergency, mostly caused by herniated lumbar disc for which urgent surgical decompression is indicated. Data on long-term clinical outcome of bladder, bowel &amp; sexual function following decompression are elusive.&#x0D; Aim: To evaluate the effectiveness of surgical decompression on recovery of CES symptoms at long-term follow-up &amp; role of timing of surgery on the outcome.&#x0D; Methods: Records of 35 CES patients who underwent surgical decompression for herniated lumbar disc during a five years period retrospectively analysed &amp; patients called for follow-up visits. Outcome measures comprised of history &amp; clinical examination pertinent to bladder, bowel &amp; sexual function.&#x0D; Results: Twenty-four patients (68.5%) were included for final evaluation who attended follow-up visits, with a minimum follow-up period of one year. Most common complaint at presentation was bladder dysfunction (100%) with urinary retention in 16 patients (66.6%), faecal incontinence in 11 (45.8%), saddle anaesthesia in 22 (91.6%) &amp; erectile dysfunction in 6 patients (out of 15 males). Only four patients underwent surgery within 48 hours of CES symptom onset, rest cases after 48 hours duration. At follow-up, bladder dysfunction present in 33.3% with urinary retention in 16.6%. Faecal incontinence persisted in 4 patients (16.6%) &amp; saddle anaesthesia in 7 (29.1%). Sexual dysfunction was the most persistent complaint.&#x0D; Conclusion: Long-term follow-up shows significant recovery of sphincteric function in CES patients after surgical decompression. Urinary &amp; bowel dysfunction improve significantly. Timing to surgery didn’t affect the long-term outcome.

Percutaneous Endoscopic Lumbar Discectomy as an Emergent Surgery for Cauda Equina Syndrome Caused by Lumbar Disc Herniation

Background: Cauda equina syndrome (CES) is a rare and serious syndrome that requires urgent surgery to improve neurological symptoms. CES can be caused by lumber disc herniation (LDH) and accounts for about 1% to 3% of all cases of disc herniation. Objectives: The purpose of this study was to analyze the characteristics and outcomes of the cases of patients with CES caused by LDH and treated by percutaneous endoscopic lumbar discectomy (PELD). Study Design: This study used a retrospective design. Setting: Research took place at the Jiangyin Hospital affiliated with Nanjing University of Chinese Medicine, Jiangsu, China. Methods: This was a retrospective study of patients treated for CES due to LDH with PELD as an emergent surgery at a single institutional department between January 2015 and March 2018. The following variables were analyzed: age, gender, the level of disc prolapse, time interval between diagnosis and surgery, lower extremity pain or weakness, perianal sensation, voluntary anal contraction, presence of bladder dysfunction, and the reversal of these deficits in follow-up. Results: After the emergent surgery with PELD, the lower extremity symptoms were all completely recovered or partly decreased. Only one patient had weakness with plantar flexion of the left foot at the one-year time point. The decreased perianal sensations were partly recovered after surgery, and 9 cases had complete recovery and 2 cases had partial recovery at the one-year follow-up. No patients had anal contraction and bladder problems after the one-year follow-up. Limitations: The number of cases reported here is limited, so we will expand the study by including an increased number of patients and a longer follow-up duration. Conclusion: Taken together, these observations show that PELD, used as a minimally invasive choice of emergent surgery, can provide enough decompression of disc prolapse and a satisfactory outcome for patients with CES caused by LDH. Key words: Cauda equina syndrome, lumbar disc herniation, outcomes, percutaneous endoscopic lumbar discectomy

An assessment of patient-reported long-term outcomes following surgery for cauda equina syndrome

BackgroundData regarding long-term outcomes following surgery for cauda equina syndrome (CES) is scarce. In addition, these studies rely on patient descriptions of the presence or absence of symptoms, with no gradation of severity. This study aimed to assess long-term bladder, bowel, sexual and physical function using validated questionnaires in a CES cohort.MethodsA pre-existing ethically approved database was used to identify patients who had undergone surgery for CES between August 2013 and November 2014. Patients were contacted over a 1-month period between August and September 2017 and completed validated questionnaires via telephone, assessing bladder (Urinary Symptom Profile), bowel (Neurogenic Bowel Dysfunction Score), sexual dysfunction (Arizona Sexual Experiences Scale) and physical function (Physical Component Summary of SF-12 Questionnaire), with scores compared between those presenting with incomplete CES (CES-I) and CES with retention (CES-R). Patients were also asked which of their symptoms currently they would most value treatment for and what healthcare services they had accessed post-operatively.ResultsForty-six of 77 patients (response rate 72%, inclusion rate 60%) with a mean age of 45 years (21–83) and mean time since admission of 43 months (range 36–60) took part in the follow-up study. The prevalence of bladder dysfunction was 76%, bowel dysfunction 13%, sexual dysfunction 39% and physical dysfunction 48%. Patients presenting with CES-R had significantly worse long-term outcomes in bladder (stream domain), bowel and sexual function in compared to those with CES-I. Pain was chosen as the symptom patients would most value treatment for by 57%, but only 7% reported post-operative pain management referral.ConclusionsWith a mean follow-up time of 43 months, these findings confirm the high prevalence of long-term bladder, sexual and physical dysfunction in CES patients and that a diagnosis of CES-R confers poorer outcomes. This study provides useful, objective data to guide the expectations of patients and clinicians.

Outcomes Reported After Surgery for Cauda Equina Syndrome: A Systematic Literature Review.

This is a systematic literature review following the Preferred Reporting Items for Systematic Reviews and Meta-analyses guidelines. To assess the outcomes reported in trials and observational studies of surgery for cauda equina syndrome (CES), and to inform the development of a core outcome set. Scoping searches revealed that there were inconsistencies in which outcomes were reported and how they were measured in research studies for patients who had undergone surgery for CES. Ovid Medline, Embase, CINAHL Plus, and trial registries were searched from January 1, 1990 to September 30, 2016 with the term "cauda equina syndrome." Inclusion and exclusion criteria were applied according to study design, diagnosis, procedure, publication date, language, and patient age. Data extracted included demographics, study design, the outcomes reported, and their definition. We also assessed variation in the use of terminology for each outcome domain. A total of 1873 articles were identified, of which 61 met the inclusion criteria. Of these, 737 outcomes reported verbatim were categorized into 20 core outcome domains and 12 subdomains with a range of 1 to 141 outcomes per outcome domain or subdomain. The most commonly reported outcomes were bladder function (70.5%), motor function (63.9%), and sensation (50.8%). Significant variation in the terms used for each outcome was documented, for example, bladder function outcome domain had 141 different terms. There is significant heterogeneity in outcomes reported for studies after surgery for CES patients. This indicates a clear need for the development of a core outcome set, which has been registered as number 824 on the COMET (Core Outcome Measure in Effectiveness Trials) database. 1.

The long term outcome of micturition, defecation and sexual function after spinal surgery for cauda equina syndrome.

BackgroundCauda equina syndrome (CES) is a rare neurologic complication of lumbar herniated disc for which emergency surgical decompression should be undertaken. Despite the common belief that the restoration of functions that are affected by CES can take several years postoperatively, follow up seldom exceeds the first year after surgery. Long term outcome of especially micturition, defecation and sexual function—which are by definition affected in CES—are unknown. The aim of this study is to evaluate 1) postoperative long term outcome of micturition, defecation and sexual function in CES patients 2) attitude of patients towards received hospital care with regard to (recovery of) these functions.MethodsCES patients were selected by screening the records of all patients operated on lumbar herniated disc in our university hospital between 1995–2010. A questionnaire was sent to the selected CES patients evaluating current complaints of micturition, defecation and sexual function and attitude towards delivered care with focus on micturition, defecation and sexual function.ResultsThirty-seven of 66 eligible CES patients were included (response rate 71%, inclusion rate 56%). Median time after surgery was 13.8 years (range 5.8–21.8 years). Dysfunction at follow up was highly prevalent: 38% micturition dysfunction, 43% defecation dysfunction and 54% sexual dysfunction. Younger age at presentation was associated with sexual dysfunction at follow up: for every year younger at presentation, odds ratio for sexual dysfunction at follow up was 1.11 (p = 0.035). Other associations with outcome were not identified. Two-third of the CES patients wished their neurosurgeon had given them more prognostic information about micturition, defecation and sexual function.ConclusionThe presented data demonstrate that dysfunction of micturition, defecation and sexual function are still highly prevalent in a large number of CES patients even years postoperatively. These alarming follow up data probably have a devastating effect on personal perceived quality of life, which should be studied in more detail. CES patients communicate a clear demand for more prognostic information. The presented figures enable clinicians to inform their CES patients more realistically about long term postoperative outcome of micturition, defecation and sexual function after surgical intervention.

73 - Systematic Literature Review of Outcomes after Surgery for Cauda Equina Syndrome

73 - Systematic Literature Review of Outcomes after Surgery for Cauda Equina Syndrome

The Factors That Affect Improvement of Neurogenic Bladder by Severe Lumbar Disc Herniation in Operation.

ObjectiveThis study analyzed retrospectively the bladder function of patients after early surgery for cauda equina syndrome (CES) performed within 24 or 48 hours, or after 48 hours of the onset of autonomic symptoms.MethodsWe retrospectively reviewed the clinical data of 31 patients after decompression surgery for lumbar disc herniation (LDH) who had been diagnosed with CES between January 2001 and December 2014 at Inha University Hospital. The following factors were assessed to evaluate the influence of time to surgery: bladder function, rectal incontinence, sexual dysfunction, LDH level, and degree of spinal canal compression.ResultsAfter decompression, the outcome group was categorized into normal bladder function and abnormal bladder function. The patients operated on within 48 hours showed an improved postoperative outcome. Among 16 patients operated on within 48 hours, 13 (81%) recovered normal bladder function. In contrast, among 15 patients with decompression after 48 hours, 6 (40%) recovered normal bladder function. Among 21 patients with mild bladder dysfunction at admission, 16 (76%) recovered normal bladder function after decompression.ConclusionOur study suggests that patients who have decompression surgery within 48 hours of the onset of bladder dysfunction, improve their chances of recovering bladder function than those who have a late operation (>48 hours). Also, patients with mild bladder dysfunction are more likely to recover bladder function after decompression, than patients with severe bladder dysfunction.

Does Early Surgical Decompression in Cauda Equina Syndrome Improve Bladder Outcome?

We analyzed retrospectively whether early surgery for cauda equina syndrome (CES) within 24, 48, or 72 hours of onset of autonomic symptoms made any difference to bladder function at initial outpatient follow-up. CES potentially causes loss of autonomic control including bladder dysfunction, resulting in significant disability. There is significant debate regarding appropriate timing of surgery. We conducted a retrospective cohort study of 200 patients between 2000 and 2011 who underwent decompressive surgery for CES at a regional neurosurgical center. Data collected were from clinical admission and at initial follow-up. Presentation was categorized into CES with retention (CESR) and incomplete CES (CESI) and duration of autonomic symptoms before surgical intervention. A total of 200 patients had complete clinical records; 61 cases with CESR and 139 cases with CESI. Average initial follow-up time was 96 days. For the 36 cases with CESI less than 24 hours, normal bladder function was seen at follow-up in all patients except 4 (11.1%), but with 103 cases with CESI more than 24 hours, 48 (46.6%) had bladder dysfunction (Pearson χP = 0.000). For the 64 cases with CESI less than 48 hours, normal bladder function was seen at follow-up in all except 10 (15.6%), but with 75 cases with CESI more than 48 hours, 42 (56%) had bladder dysfunction (Pearson χP = 0.000). For the 35 patients with CESR, operating within 24, 48, or 72 hours made no obvious difference to bladder outcome. Data were also reanalyzed changing the dataset groups to CESI less than 24 hours, 24 to 48 hours, and more than 48 hours to calculate odds ratios regarding normal bladder outcome. We identified that decompressive surgery within 24 hours of onset of autonomic symptoms in CESI reduces bladder dysfunction at initial follow-up, but no statistically significant difference in outcome was observed in CESR regarding timing of operation. 3.

Comparative Analysis of Patients With Cauda Equina Syndrome Versus an Unaffected Population Undergoing Spinal Surgery

Retrospective analysis. To determine patient demographics, incidence of comorbidities, and procedure-related complications and identify risk factors associated with morbidity and mortality after spinal surgery for cauda equina syndrome (CES). To our knowledge, no study has provided nationwide estimates of patient characteristics and procedure-related complication rates after spinal surgery for CES relative to an unaffected population. Nationwide Inpatient Sample data collected between 2001 and 2010 were analyzed. Discharges with procedural codes for lumbar spinal fusion, decompression, or discectomy were included. The CES cohort included diagnoses of CES, and the unaffected cohort included lumbar spinal pathology diagnoses. Patient demographics, incidence of comorbidities and procedure-related complications, and risk factors associated with morbidity and mortality were compared. Discharges for 11,207 CES and 689,799 unaffected patients were identified. Differences between cohorts were found for demographic and hospital data. Average comorbidity indices for the CES cohort were found to be increased (0.23 vs. 0.13, P < 0.0001), as well as the incidence of total procedure-related complications (18.63% vs. 13.12%, P < 0.0001). In-hospital mortality rate was significantly increased for the CES cohort (0.30% vs. 0.08%, P < 0.0001). A number of comorbidities associated with additional risk for morbidity and mortality among the CES cohort were identified. Relative to an unaffected population undergoing similar treatment, patients with CES were more likely to have increased associated comorbidities on presentation, as well as increased complication rates with a prolonged hospital course postoperatively. CES was found to carry an increased incidence of procedure-related complications as well as in-hospital mortality. A number of comorbidities associated with additional risk for morbidity and mortality among the CES cohort were identified. This study provides clinically useful data for surgeons to educate patients at risk for morbidity and mortality as well as direct future research to improve patient outcomes. 3.

The Value of Interhospital Transfer and Emergency MRI for Suspected Cauda Equina Syndrome: A 2-Year Retrospective Study

The timing of surgery in cauda equina syndrome due to prolapsed intervertebral disc remains controversial. Assessment of these patients requires magnetic resonance imaging (MRI), which is of limited availability outside normal working hours in the UK. We reviewed radiological results in all patients undergoing emergency MRI within our unit for suspected cauda equina syndrome over a 2-year period, and all subjects undergoing emergency lumbar discectomy for cauda equina syndrome within the same period. Outcome measures were: proportion of positive findings in symptomatic patients and proportion of patients referred with diagnostic MRI scans undergoing emergency surgery. We also assessed outcomes of patients having surgery for cauda equina syndrome in terms of improvement of pain, sensory and sphincter disturbance. A total of 76 patients were transferred for assessment and 'on-call' MRI; 27 were subsequently operated upon. Only 5 proceeded to emergency discectomy that night (prior to next scheduled list). This may be due to delays in timing--from referral to acceptance, to arrival in the department, to diagnostic scan and to theatre. With the second group of patients, 43 had emergency discectomy for cauda equina syndrome during the study period. Of these, 6 patients had an out-of-hours MRI at our hospital for assessment (one patient living locally). Most surgically treated patients experienced improvement in their pain syndrome, with approximately two-thirds experiencing improvement in sensory and sphincter disturbance. These data support a policy of advising MRI scan for cauda equina syndrome at the earliest opportunity within the next 24 h in the referring hospital, rather than emergency transfer for diagnostic imaging which has a relatively low yield in terms of patients operated on as an emergency.

Cauda equina syndrome treated by surgical decompression: the influence of timing on surgical outcome

A prospective longitudinal inception cohort study of 33 patients undergoing surgery for cauda equina syndrome (CES) due to a herniated lumbar disc. To determine what factors influence spine and urinary outcome measures at 3 months and 1 year in CES specifically with regard to the timing of onset of symptoms and the timing of surgical decompression. CES consists of signs and symptoms caused by compression of lumbar and sacral nerve roots. Controversy exists regarding the relative importance of timing of surgery as a prognostic factor influencing outcome. Post-operative outcome was assessed at 3 months and 1 year using the Oswestry Disability Index (ODI), Visual Analogue Scale (VAS) scores for leg and back pain and an incontinence questionnaire. Statistical analysis was used to determine the association between pre-operative variables and these post-operative outcomes with a specific emphasis on the timing of surgery. Surgery was performed on 12 (36%) patients within 48 h of the onset of symptoms including seven patients (21%) who underwent surgery within 24 h. Follow up was achieved in 27 (82%) and 25 (76%) patients at 3 and 12 months, respectively. There was no statistically significant difference in outcome between three groups of patients with respect to length of time from symptom onset to surgery- <24, 24-48 and >48 h. A significantly better outcome was found in patients who were continent of urine at presentation compared with those who were incontinent. The duration of symptoms prior to surgery does not appear to influence the outcome. This finding has significant implications for the medico-legal sequelae of this condition. The data suggests that the severity of bladder dysfunction at the time of surgery is the dominant factor in recovery of bladder function.

Cauda Equina Syndrome

Retrospective cohort study with prospective clinical follow-up. To determine the factors that influence outcome after surgery for cauda equina syndrome (CES). CES is a rare but serious consequence of lumbar disc prolapse and can have devastating long-lasting neurologic consequences. The timing of surgical decompression remains controversial. Fifty-six patients with evidence of a sphincteric disturbance who underwent urgent surgery were identified and invited to follow-up. The outcome measures comprised history and examination and several validated self-assessment questionnaires. Forty-two patients (78%) attended with a mean follow-up of 60 months (range, 25-114 months). Mean age at onset was 41 years (range, 24-67 years) with 23 males and 19 females. Twenty-six patients were operated on within 48 hours of onset of sphincteric symptoms; 5 of these were within 24 hours. Acute onset of sphincteric symptoms and the time to operation did not influence the outcomes. Leg weakness at onset persisted in a significant number of patients at follow-up (P < 0.005). Urinary disturbance at presentation did not affect the outcomes. At follow-up, significantly more females had urinary incontinence (P < 0.005). Bowel dysfunction at presentation was associated with sexual problems at follow-up (P < 0.005). The 13 patients who failed their post operative trial without catheter had worse outcomes. The SF-36 scores at follow-up were reduced compared with age-matched controls in the population. The mean ODI was 29, Low Back Outcome Score 42, and VAS 4.5. The time elapsed from operation to follow-up was not found to influence the outcomes. In our series, the symptom duration before operation and the speed of onset do not affect the outcome more than 2 years after surgery. Based on the SF-36, ODI, and Low Back Outcome Scores, patients who have had CES do not return to a normal status.

The role of surgical decompression of Cauda equina in lumbar disc herniation in recovery of bladder function

Cauda equina syvndrome from lumbar disc herniation accounts for up to 2-3% of all disc herniations. The aim of this study was to investigate whether recovery of bladder function after surgery depends on preoperative duration of desease. This retrospective study included 47 patients who underwent surgery for cauda equina syndrome due to a herniated disc in the period between 1997 and 2002. Eleven patients were female and 36 male, with a mean age of 43 years (range 23-67). All presented with sciatica and saddle hypoesthesia, whereas 13 presented with motor weakness of legs. All patients had been catheterized at the time of admission to the Neurosurgical unit. Levels of herniation were L4-L5 in 27 (57%), L5-S1 in 14 (30%), and L3-L4 in 6 (13%) patients. In 7 (15%) patients, surgery was performed within 48 hours of the cauda equina syndrome onset. None underwent surgery within 24 hours. 13 (28%) patients were operated between the 2nd and 7th day and 27 (57%) after 7th day of the cauda equina onset. The role of preoperative duration of symtoms in recovery of bladder function was examined (chi 2 analysis). The follow-up ranged from 15 to 74 months (mean 24.2 months). In 33 patients (70%) excellent result were achieved, in 9 (19%) patients good results and 5 (11%) patients presented with poor results. There was no statistically significant difference concerning the time between the onset of symptoms and surgical decompression and subsequent recovery of bladder function (p>0.05). After accurate diagnosis and adequate operative treatment, postoperative results of cauda equina syndrome due to lumbar disc herniation appear satisfactory regardless of the timing of surgery.