Constipation and other chronic gastrointestinal problems in spinal cord injury patients

Impact of Activity-Based Training on Bowel Function in a Rat Model of Spinal Cord Injury

Significant bowel-related issues after spinal cord injury (SCI) that affect morbidity and quality of life (QOL) include diminished bowel motility, loss of sphincter control, gastric ulcers, autonomic dysreflexia, pain, diarrhea, constipation, and fecal incontinence. Clinical diagnoses and research in humans have largely relied on anorectal manometry (ARM) procedures to increase understanding of the functional effects of SCI on colorectal motility and defecation physiology. Recent pre-clinical rodent studies have also used ARM to further our understanding of bowel-related dysfunctions post-SCI. In the present study, the benefits of different activity-based training (ABT) durations on bowel function were examined. Six groups of male rats including two non-training (NT; uninjured and SCI) and four ABT (quadrupedal [Quad or Q] stepping on a treadmill) groups. All ABT animals received 4 weeks of 1-h daily stepping beginning 2 weeks post-SCI followed by variable amounts for 4 additional weeks (none; daily; once a week; daily for final 4th week only). Outcome measures included fecal output (home cage; metabolic cage) throughout the study and terminal measurements (post 8-week ABT) of external anal sphincter (EAS) electromyography, resting anorectal pressure, and giant contraction (GC) activation under urethane anesthesia. The results indicate that treadmill training normalized defecation amount based on feces weight and food intake, as well as GC frequency, EAS latency and amplitude during fecal expulsion, and resting pressure in specific areas within the colorectum. The two intermittent training groups consistently showed recorded metrics comparable to the non-injured group. The results demonstrate bowel dysfunction in the rodent SCI contusion model with improvements in functional outcomes following ABT. Importantly, the benefits to bowel-related functions with versus without intermittent ABT illustrate the need for periodic therapy to maintain the functional gains of ABT.

Therapeutic potential of allosteric modulators for the treatment of gastrointestinal motility disorders

Gastrointestinal motility is tightly regulated by the enteric nervous system (ENS). Disruption of coordinated enteric nervous system activity can result in dysmotility. Pharmacological treatment options for dysmotility include targeting of G protein-coupled receptors (GPCRs) expressed by neurons of the enteric nervous system. Current GPCR-targeting drugs for motility disorders bind to the highly conserved endogenous ligand-binding site and promote indiscriminate activation or inhibition of the target receptor throughout the body. This can be associated with significant side-effect liability and a loss of physiological tone. Allosteric modulators of GPCRs bind to a distinct site from the endogenous ligand, which is typically less conserved across multiple receptor subtypes and can modulate endogenous ligand signalling. Allosteric modulation of GPCRs that are important for enteric nervous system function may provide effective relief from motility disorders while limiting side-effects. This review will focus on how allosteric modulators of GPCRs may influence gastrointestinal motility, using 5-hydroxytryptamine (5-HT), acetylcholine (ACh) and opioid receptors as examples.

Guideline for the management of neurogenic bowel dysfunction in spinal cord injury/disease

Introduction

Almost all people with spinal cord injury/disease (SCI/D) suffer from neurogenic bowel dysfunction (NBD), with a considerable impact on quality of life. The Association of the Scientific Medical Societies in Germany (AWMF e.V.) guideline for NBD in SCI/D aims to provide practice-oriented support for the care of patients with NBD resulting from congenital or aquired SCI/D. The guideline describes the diagnosis and bowel management of NBD in people with SCI/D. Thus, treatment processes in acute medical care and rehabilitation as well as for lifelong aftercare are presented.

Methods

The present guideline was developed under the leadership of the German-speaking Medical Society for Paraplegiology in a multiprofessional interdisciplinary guideline team. To exceed the level of expert recommendations, consensus was reached within the framework of a structured nominal group process in defined steps under neutral moderation considering the criteria of the German guideline development instrument (DELBI).

Results

Individual bowel management must be developed on the basis of an adequate diagnosis and considering the different lesion types. Due to the multifactorial influenceability of the intestine and the individual neurological deficit, a simple to-do checklist is not effective. Various and complex bowel management programmes are the basis of the treatment of NBD.

Conclusions

Guidelines can only be successful in so far as they are applied in everyday life. Of course, the selection and application of the measures described must always take into consideration the individual situation of the person concerned, and the correct application is always a prerequisite for success.

Neurogenic Bowel Dysfunction: The Impact of the Central Nervous System in Constipation and Fecal Incontinence

Spinal cord injury and neurogenic bowel dysfunction (NBD) are life-changing events for affected patients. The clinical manifestations of NBD vary depending on the level and severity of the spinal cord lesion. Managing patients with NBD can be complicated by comorbidities, such as immobility, bladder dysfunction, progressive neurologic decline, psychological factors, loss of independence, and social withdrawal, and ideally involves a multimodal, multidisciplinary approach. Evaluation and management should be individualized, depending on the residual neurologic capabilities of the patient and their predominant gastrointestinal symptoms, and commonly involves lifestyle modifications, physical therapy, laxative medications, and surgical interventions.

Neurogenic Bowel in Acute Rehabilitation Following Spinal Cord Injury: Impact of Laxatives and Opioids

Objective: To explore the association between bowel dysfunction and use of laxatives and opioids in an acute rehabilitation setting following spinal cord injury (SCI). Methods: Data was collected regarding individuals with acute traumatic/non-traumatic SCI over a two-year period (2012–2013) during both the week of admission and discharge of their inpatient stay. Results: An increase in frequency of bowel movement (BM) (p = 0.003) and a decrease in frequency of fecal incontinence (FI) per week (p < 0.001) between admission and discharge was found across all participants. There was a reduction in the number of individuals using laxatives (p = 0.004) as well as the number of unique laxatives taken (p < 0.001) between admission and discharge in our cohort. The number of individuals using opioids and the average dose of opioids in morphine milligram equivalents (MME) from admission to discharge were significantly reduced (p = 0.001 and p = 0.02, respectively). There was a positive correlation between the number of laxatives and frequency of FI at discharge (r = 0.194, p = 0.014), suggesting that an increase in laxative use results in an increased frequency of FI. Finally, there was a significant negative correlation between average dose of opioids (MME) and frequency of BM at discharge, confirming the constipating effect of opioids (r = −0.20, p = 0.009).

Colonic stool burden on computed tomography does not correlate with bowel habit: a cross-sectional study

PURPOSE

Stool burden on abdominal radiographs is not reflective of constipation, perhaps because of variable fecal shadowing or limited inter-rater agreement. These limitations are hypothetically mitigated by computed tomography (CT). This research aimed (i) to evaluate whether bowel movement frequency, stool form, or a diagnosis of functional constipation correlate or associate with stool burden identified on CT, and (ii) to investigate whether physicians use CT in their assessment of a patients' bowel function.

METHODS

Patients attending for non-emergent abdominal CT imaging were invited to participate by completing a bowel questionnaire. Stool burden identified on imaging was determined and inter-rater reliability was evaluated in a subgroup of patients (n = 20). Descriptive and comparative analyses were performed. An online questionnaire evaluated the use of abdominal imaging in assessing patients' bowel function in a cross-section of ordering physicians.

RESULTS

The patient response rate was 19% (96/516). No clinically useful associations between fecal burden and stool form, bowel motion frequency, gastrointestinal symptoms or a diagnosis of constipation was identified. The physician response rate was 35% (33/94). Opportunistic use of data was more common than deliberate use. However, an abdominal radiograph or CT scan had been requested by 42% and 18% of physicians respectively to assess patient's chronic bowel habit. Approximately 30% of physicians believed evidence supported this practice.

CONCLUSIONS

Physicians may use abdominal CT in their assessment of patients' chronic bowel habits. However, objective assessment does not support this practice. Colonic stool burden does not correlate with patient-reported symptoms or a criteria-based diagnosis of constipation.

Effects of Lower Thoracic Spinal Cord Stimulation on Bowel Management in Individuals With Spinal Cord Injury

OBJECTIVE

To systematically determine whether use of the spinal cord stimulation (SCS) system to restore cough may improve bowel management (BM) in individuals with spinal cord injury (SCI).

DESIGN

Experimental studies (clinical trial).

SETTING

Inpatient hospital setting for electrode insertion; outpatient setting for measurement of respiratory pressures; home setting for application of SCS.

PARTICIPANTS

Participants (N=5) with cervical SCI.

INTERVENTION

A fully implantable SCS cough system was surgically placed in each subject. SCS was applied at home, 2-3 times/d, on a chronic basis, every time bowel regimen was performed and as needed for secretion management. Stimulus parameters were set at values resulting in near maximum airway pressure generation, which was used as an index of expiratory muscle strength. Participants also used SCS during their bowel routine.

MAIN OUTCOME MEASURES

Airway pressure generation achieved with SCS. Weekly completion of Bowel Routine Log including BM time, mechanical measures, and medications used.

RESULTS

Mean pressure during spontaneous efforts was 30±8 cmH₂O. After a period of reconditioning, SCS resulted in pressure of 146±21 cmH₂O. The time required for BM routines was reduced from 118±34 minutes to 18±2 minutes (P<.05) and was directly related to the magnitude of pressure development during SCS. Mechanical methods for BM were completely eliminated in 4 patients. No patients experienced fecal incontinence as result of SCS. Each participant also reported marked overall improvement associated with BM.

CONCLUSIONS

Our results of this pilot study suggest that SCS to restore cough may be a useful method to improve BM and life quality for both patients with SCI and their caregivers. Our results indicate that the improvement in BM is secondary to restoration of intra-abdominal pressure development.

Colostomy and quality of life after spinal cord injury: systematic review

BACKGROUND

Spinal cord injury (SCI) has a significant impact on the quality of life (QoL) of affected patients. The aim of this review was to determine whether colostomy formation improves QoL in patients with SCI.

METHODS

The Cochrane Register, MEDLINE, Embase and CINAHL were searched using medical subject headings. The search was extended to the reference lists of identified studies, ClinicalTrials.gov and the WHO International Clinical Trials Registry. All clinical trials that included spinal injury and QoL, time spent on bowel care, and patient satisfaction with stoma were assessed.

RESULTS

A total of 15 studies were found (including 488 patients with a stoma), of which 13 were retrospective cross-sectional studies and two were case-control studies, one of which was prospective research. Nine of 11 studies focusing on QoL reported that patients' QoL was improved by the stoma, whereas the remaining two studies found no difference. Time spent on bowel care was significantly reduced in all 13 studies that considered this outcome, with patients reducing the average time spent on bowel care from more than 1 h to less than 15 min per day. All 12 studies assessing patient satisfaction with their stoma reported high patient satisfaction.

CONCLUSION

Stoma formation improves QoL, reduces time spent on bowel care, and increases independence. Stoma is an option that could be discussed and offered to patients with spinal cord injury.

Small intestinal bacterial overgrowth as a cause of protracted wound healing and vitamin D deficiency in a spinal cord injured patient with a sacral pressure sore: a case report

BACKGROUND

Pressure sores are sometimes refractory to treatment, often due to malnutrition. Small intestinal bacterial overgrowth (SIBO) obstructs absorption in the digestive tract and causes malnutrition. However, little is known about the association between pressure sore wound healing and SIBO. Here, we report a case of a patient with a refractory sacral pressure sore and SIBO.

CASE PRESENTATION

A 66-year-old woman who was spinal cord injured 14 years before visiting our hospital presented with the chief complaint of a sacral pressure sore, 10.0 × 6.5 cm in size, which was refractory to treatment. Physical examination showed abdominal distension and emaciation, with a body mass index of 15. Further examination revealed elevated serum alkaline phosphatase (1260 U/L), bilateral tibial fracture, multiple rib fracture, and osteoporosis. We diagnosed the patient with osteomalacia with vitamin D deficiency. Despite oral supplementation, serum levels of calcium, phosphorous, and vitamin D remained low. Also, despite concentrative wound therapy for the sacral pressure sore by plastic surgeons, no wound healing was achieved. Due to a suspicion of disturbances in nutrient absorption, we performed bacterial examination of collected gastric and duodenal fluid, which showed high numbers of bacteria in gastric content (10⁴ E. coli, 10⁵ Streptococcus species, and 10⁵ Neisseria species) and duodenal content (10⁶ E. coli, 10⁴ Candida glabrata). Therefore, we diagnosed the patient with SIBO and started selective decontamination of the digestive tract using polymyxin B sulfate and amphotericin B. After starting treatment for SIBO, the sacral pressure sore began to heal and was nearly healed after 285 days. The patient's serum levels of calcium, phosphorous, vitamin D, and other fat-soluble vitamins also gradually increased after starting treatment for SIBO.

CONCLUSION

We report a case of a patient with a refractory sacral pressure sore that healed after starting treatment for SIBO. We conclude that SIBO may be an overlooked cause of malnutrition and poor wound healing in patients with chronic pressure sores.

Investigation of Bowel Function with Anorectal Manometry in a Rat Spinal Cord Contusion Model

Bowel dysfunction after chronic spinal cord injury (SCI) is a common source of morbidity and rehospitalization. Typical complications include constipation, fecal impaction, incontinence, abdominal distention, autonomic dysreflexia, and the necessity of interventions (i.e., suppositories, digital stimulation) to defecate. Numerous surveys have confirmed that the remediation of bowel complications is more highly valued for quality of life than improvements in walking. Much of what is known about bowel function after SCI for diagnosis and research in humans has been gained using anorectal manometry (ARM) procedures. However, ARM has been underutilized in pre-clinical animal work. Therefore, a novel combination of outcome measures was examined in the current study that incorporates functional output of the bowel (weekly fecal measurements), weight gain (pre-injury to terminal weight), and terminal ARM measurement with external anal sphincter electromyography under urethane anesthesia. The results indicate higher fecal output after contusion during the sub-acute period (4-7 days) post-injury, changes in the composition of the feces, and functionally obstructive responses in a specific section of the rectum (increased baseline pressure, increased frequency of contraction, and reduced ability to trigger a giant contraction to a distension stimulus). These results demonstrate significant bowel dysfunction in the rodent SCI contusion model that is consistent with data from human research. Thus, the combined measurement protocol enables the detection of changes and can be used, with minimal cost, to assess effectiveness of therapeutic interventions on bowel complications.

Spinal cord injury and diaphragm neuromotor control

Introduction: Neuromotor control of diaphragm muscle and the recovery of diaphragm activity following spinal cord injury have been narrowly focused on ventilation. By contrast, the understanding of neuromotor control for non-ventilatory expulsive/straining maneuvers (including coughing, defecation, and parturition) is relatively impoverished. This variety of behaviors are achieved via the recruitment of the diverse array of motor units that comprise the diaphragm muscle.Areas covered: The neuromotor control of ventilatory and non-ventilatory behaviors in health and in the context of spinal cord injury is explored. Particular attention is played to the neuroplasticity of phrenic motor neurons in various models of cervical spinal cord injury.Expert opinion: There is a remarkable paucity in our understanding of neuromotor control of maneuvers in spinal cord injury patients. Dysfunction of these expulsive/straining maneuvers reduces patient quality of life and contributes to severe morbidity and mortality. As spinal cord injury patient life expectancies continue to climb steadily, a nexus of spinal cord injury and age-associated comorbidities are likely to occur. While current research remains concerned only with the minutiae of ventilation, the major functional deficits of this clinical cohort will persist intractably. We posit some future research directions to avoid this scenario.

Central pattern generators in the brainstem and spinal cord: an overview of basic principles, similarities and differences

Central pattern generators (CPGs) are generally defined as networks of neurons capable of enabling the production of central commands, specifically controlling stereotyped, rhythmic motor behaviors. Several CPGs localized in brainstem and spinal cord areas have been shown to underlie the expression of complex behaviors such as deglutition, mastication, respiration, defecation, micturition, ejaculation, and locomotion. Their pivotal roles have clearly been demonstrated although their organization and cellular properties remain incompletely characterized. In recent years, insightful findings about CPGs have been made mainly because (1) several complementary animal models were developed; (2) these models enabled a wide variety of techniques to be used and, hence, a plethora of characteristics to be discovered; and (3) organizations, functions, and cell properties across all models and species studied thus far were generally found to be well-preserved phylogenetically. This article aims at providing an overview for non-experts of the most important findings made on CPGs in in vivo animal models, in vitro preparations from invertebrate and vertebrate species as well as in primates. Data about CPG functions, adaptation, organization, and cellular properties will be summarized with a special attention paid to the network for locomotion given its advanced level of characterization compared with some of the other CPGs. Similarities and differences between these networks will also be highlighted.

Dietary management of neurogenic bowel in adults with spinal cord injury: an integrative review of literature

OBJECTIVE

To examine the literature for current evidence on the dietary management of neurogenic bowel in adults with spinal cord injuries (SCIs).

BACKGROUND

Neurogenic bowel dysfunction presenting as faecal incontinence or constipation is a common occurrence in individuals with SCI. It poses numerous challenges for the management of bowel function and has a significant impact on quality of life following SCI. Dietary management is a common, early treatment strategy as a conservative approach for neurogenic bowel; however, current recommendations rely on expert opinion only.

METHODS

An integrative review of the literature using a systematic search was conducted using Medline, Embase, CINAHL, Proquest, and Google Scholar. The selected articles were critically appraised using Critical Appraisal Skills Programme checklists by two independent reviewers. The risk of bias of studies and the quality of evidence for outcomes were assessed using the risk of bias tool and the grading of recommendations, assessment, development, and evaluation system in the Cochrane handbook for systematic review of interventions.

RESULTS

Thirteen studies that met the inclusion criteria were identified exploring a variety of diet-related factors: foods, dietary behaviours, and multiple interventions including a diet plan. However, the dietary management strategies used varied significantly between studies, posing challenges to ascertain its efficacy.

CONCLUSION

Given the low level of evidence and paucity of data on dietary management of neurogenic bowel, the efficacy of dietary strategies (alone or in combination with others) in managing neurogenic bowel cannot be substantiated from the studies identified. Therefore, more robust studies are warranted to bridge this gap.IMPLICATIONS FOR REHABILITATIONConsumption of ∼15 g dietary fibre is shown to be beneficial in managing neurogenic bowel in SCI.Further research is required to strengthen evidence for fibre recommendations and investigating the potential benefits of traditional and non-traditional dietary approaches.

National Survey of Bladder and Gastrointestinal Dysfunction in People with Spinal Cord Injury

Small-scale studies indicate that spinal cord injury (SCI) may lead to significant gastrointestinal and bladder dysfunction. However, how the prevalence of chronic disease related to these dysfunctions compares with non-SCI individuals and whether there are robust relationships to level and severity of injury are still unclear. Here, our goal was to provide high-level evidence on the association between bladder and gastrointestinal dysfunction and SCI using population-level data from the Canadian Community Health Survey (CCHS) and the SCI Community Survey. Data from more than 60,000 individuals in the 2010 CCHS and 1500 individuals with SCI from the SCI Community Survey were analyzed. We used bi-variable and multi-variable logistic regression to examine relationships between explanatory and outcome variables. We found that SCI was associated with increased odds of urinary incontinence (adjusted odds ratio [aOR] = 5.0, 95% confidence interval [CI]: 3.4-7.1), bowel disorders (aOR = 2.3, CI: 1.5-3.4), as well as gastric ulcers (aOR: 3.3, CI: 2.1-4.8), even after adjusting for key confounding variables. Additionally, we found that complete SCI was associated with increased odds of urinary tract infections (aOR = 2.0, CI: 1.6-2.5) and bowel incontinence (aOR = 2.1, CI: 1.7-2.6). Individuals with SCI are at increased odds for having bladder and gastrointestinal dysfunction, certain aspects of which are dependent on the level and severity of injury. Targeted intervention and prevention strategies to manage bladder and bowel problems after SCI should be a priority for both caregivers and policy makers.

Anti-muscarinic drugs increase rectal compliance and exacerbate constipation in chronic spinal cord injury : Anti-muscarinic drug effect on neurogenic bowel

STUDY DESIGN

Prospective cohort study OBJECTIVES: We hypothesized that anti-muscarinic agents alter rectal compliance in SCI patients and that altered rectal compliance relates to bowel symptomatology. Our primary aim was to compare rectal compliance before and after the institution of anti-muscarinics (solifenacin and tolterodine) and an adrenoceptor agonist (mirabegron) in these patients. Additionally, we wanted to evaluate if anorectal manometry differed before and after use of anti-muscarinic agents.

SETTING

Tertiary neurogastroenterology clinic, London METHODS: Thirty-five patients with supraconal spinal cord injury (SCI) underwent anal manometry, assessment of rectoanal inhibitory reflex (RAIR) and rectal compliance before and after anti-muscarinic treatment (for overactive bladder) was started (mean follow-up 12 weeks). Patients were assessed identically, pre-and post-treatment (solifenacin n = 17, tolterodine n = 10, mirabegron n = 8). Doses used were as for non-SCI patients.

RESULTS

Resting, squeeze and cough pressures were unchanged after anti-muscarinic treatment. Rectal compliance was significantly raised after anti-muscarinic treatment (p = 0.001). The percent amplitude of maximal sphincter relaxation of the RAIR was decreased (p < 0.001) and excitation latency was increased (p = 0.006). There was no significant change in the duration of recovery of the RAIR. There was a significant increase of the Wexner Constipation Score (p = 0.001) but no change in the Wexner Incontinence Score. There was a significant correlation between change in rectal compliance and change in Wexner Constipation Score (p = 0.001). Thus, increasing compliance of the rectum is associated with worsening of constipation after anti-muscarinic therapy. However, there were no changes in anorectal manometry or rectal compliance in those who received mirabegron.

CONCLUSION

Anti-muscarinic therapy for overactive bladder increases compliance of the neurogenic rectum and alters anorectal reflex activity, with worsening of constipation.

Neurogenic bowel dysfunction in patients with multiple sclerosis: prevalence, impact, and management strategies

Bowel dysfunction in patients with multiple sclerosis (MS) is highly prevalent. Constipation and fecal incontinence can coexist and alternate, impacting on the patient's quality of life and social interactions, as well as burdening the caregivers. The cost for the health care providers is also significant, with increased number of hospital admissions, treatment-related costs, and hospital appointments. The origin is multifactorial, and includes alteration of neurological pathways, polypharmacy, behavioral elements, and ability to access the toilet. Every patient with MS should be sensitively questioned about bowel function, and red flag symptoms should prompt adequate investigations. Manipulation of life style factors and establishment of a bowel regime should be attempted in the first place, and if this fails, other measures such as biofeedback and transanal irrigation should be included. A stoma can improve quality of life, and is not necessarily a last-ditch option. Antegrade colonic enemas can also be an effective option, whilst neuromodulation has not proved its role yet. Effective treatment of bowel dysfunction improves quality of life, reduces incidence of urinary tract infection, and reduces health care costs.

Phytotherapeutic effects of the fruits of Poncirus trifoliata (L.) Raf. on cancer, inflammation, and digestive dysfunction

Poncirus trifoliata (L.) Raf. belongs to the family Rutaceae in the genus Poncirus. Its fruits are widely used to alleviate symptoms of various disorders. The mature fruit (MF) possesses anticancer and antiinflammatory activities. Extracts of the dried, immature fruit, Poncirus fructus (PF) are widely used as a traditional medicine for ameliorating symptoms of digestive dysfunction in East Asia. Molecular and cellular mechanisms underlying the effects of MF and PF extracts on cancer, inflammation, and gastrointestinal disorders have been extensively studied in the past decade. This review summarizes recent findings on the anticancer and antiinflammatory effects of MF and the prokinetic effects of PF. Although the therapeutic effects of MF and PF have been clearly elucidated, in-depth further clinical studies are still required to completely verify the clinical efficacy and safety of the fruits of P. trifoliata (L.) Raf.

Ageing with neurogenic bowel dysfunction

STUDY DESIGN

Longitudinal study with postal survey.

OBJECTIVES

To describe changes in the patterns of neurogenic bowel dysfunction and bowel management in a population of people with spinal cord injury (SCI) followed for two decades.

SETTING

Members of the Danish SCI Association.

METHODS

In 1996, a validated questionnaire on bowel function was sent to the members of the Danish SCI Association (n=589). The same questionnaire was sent to all the surviving members in 2006 (n=284) and in 2015 (n=178). A total of 109 responded to both the 1996 and 2015 questionnaires.

RESULTS

Comparing data from 2015 with those from the exact same participants in 1996, the proportion of respondents needing more than 30 min for each defaecation increased from 21 to 39% (P<0.01), the use of laxatives increased (P<0.05) and the proportion considering themselves very constipated increased from 19 to 31% (P<0.01). In contrast, the proportion suffering from faecal incontinence remained stable at 18% in 1996 and 19% in 2015. During the 19-year period, there had been no significant change in the methods for bowel care, but 22 (20%) had undergone surgery for bowel dysfunction, including 11 (10%) who had some form of stoma.

CONCLUSION

Self-assessed severity of constipation increased but quality of life remained stable in a cohort of people with SCI followed prospectively for 19 years. Methods for bowel care remained surprisingly stable but a large proportion had undergone stoma surgery.

International spinal cord injury bowel function basic data set (Version 2.0)

STUDY DESIGN

International expert working group.

OBJECTIVES

To revise the International Spinal Cord Injury (SCI) Bowel Function Basic Data Set as a standardized format for the collecting and reporting of a minimal amount of information on bowel function in clinical practice and research.

SETTING

Working group appointed by the American Spinal injury association (ASIA) and the International Spinal Cord Society (ISCoS).

METHODS

The draft prepared by the working group was reviewed by the International SCI Data Set Committee and later by members of the ISCoS Executive and Scientific Committees and the ASIA board. The revised data set was posted on the ASIA and ISCoS websites for 1 month to allow further comments and suggestions. Changes resulting from a Delphi process among experts in children with SCI were included. Members of ISCoS Executive and Scientific Committees and the ASIA board made a final review and approved the data set.

RESULTS

The International SCI Bowel Function Basic Data Set (Version 2.0) consists of the following 16 items: date of data collection, gastrointestinal and anal sphincter dysfunction unrelated to SCI, surgical procedures on the gastrointestinal tract, defecation method and bowel-care procedures, average time required for defecation, frequency of defecation, uneasiness, headache or perspiration during defecation, digital stimulation or evacuation of the anorectum, frequency of fecal incontinence, flatus incontinence, need to wear pad or plug, oral laxatives and prokinetics, anti-diarrheal agents, perianal problems, abdominal pain and discomfort and the neurogenic bowel dysfunction score.

CONCLUSION

The International SCI Bowel Function Basic Data Set (Version 2.0) has been developed.

Effects and Safety of Aqueous Extract of Poncirus fructus in Spinal Cord Injury with Neurogenic Bowel

Objective. To investigate the effects and safety of the aqueous extract of the dried, immature fruit of Poncirus trifoliata (L.) Raf., known as Poncirus fructus (PF), in spinal cord injury (SCI) patients with neurogenic bowel. Methods. Thirty-one SCI patients with neurogenic bowel were recruited. Patients were evaluated based on clinical information, constipation score, Bristol Stool Form Scale, stool retention score using plain abdominal radiograph, and colon transit time. PF was administered in dosages of 800 mg each prior to breakfast and lunch for 14 days. Results. The morphological feature of the stool before and after administration indicated a statistically significant difference from 3.52 ± 1.33 to 4.32 ± 1.44 points (p < 0.05). Stool retention score before and after administration of PF was represented with low significance (7.25 ± 1.60 to 6.46 ± 1.53 points) in the whole colon (p < 0.05), and the colon transit time was significantly shortened (57.41 ± 20.7 to 41.2 ± 25.5 hours) in terms of the whole transit time (p < 0.05). Side effects were observed in 7 people (28.0%) consisting of 2 people with soft stools and 5 people with diarrhea. Conclusion. For SCI patients, PF administration significantly improved defecation patterns, defecation retention, and colon transit time. PF could be an effective aid to improve colonic motility and constipation.

Neurogenic bowel dysfunction (NBD) translation and linguistic validation to classical Arabic

OBJECTIVE

To translate and linguistically validate in classical Arabic; the French version of the neurogenic bowel dysfunction (NBD).

PATIENTS AND METHODS

Arabic translation of the NBD score was obtained by the "forward translation/backword translation" method. Patients with multiple sclerosis (MS) and spinal cord injury were included. Evaluation of intestinal and anorectal disorders was conducted by the self-administered questionnaire NBD, which was filled twice two weeks apart. An item-by-item analysis was made. The feasibility, acceptability, internal consistency using Cronbach's alpha, and test-retest repeatability by non-parametric Spearman correlation were studied.

RESULTS

Twenty-three patients with colorectal disorders secondary to neurological disease were included, the average age was 40.79±9.16years and the sex-ratio was 1.85. The questionnaire was feasible and acceptable, no items were excluded. The spearman correlation was of 0.842. Internal consistency was judged good through the Cronbach's alpha was of 0.896.

CONCLUSION

The Arabic version of NBD was reproducible and construct validity was satisfactory. The study of its responsiveness to change with a larger number of patients will be the subject of further work.

LEVEL OF EVIDENCE

4.

Bowel function and quality of life after colostomy in individuals with spinal cord injury

OBJECTIVE

To evaluate the effect of colostomy on bowel function and quality of life (QoL) in individuals with spinal cord injury (SCI).

DESIGN

Cross-sectional descriptive study.

SETTING

Department for Spinal Cord Injuries and Departments of Gastroenterology and Radiology, Rigshospitalet.

PARTICIPANTS

Eighteen individuals with SCI and a colostomy performed post injury, 12 males, 6 females, 8 with tetraplegia and 10 with paraplegia. Median age at time of study was 49.9 years, years since lesion was 3-56 years, and time since colostomy was performed 0.5 to 20 years.

INTERVENTIONS

Questionnaires and measurement of gastrointestinal transit time (GITT).

OUTCOME MEASURES

Retrospective data collection from patient records, a questionnaire on bowel management pre and post colostomy, quality of life (QoL) by SF-36, and GITT.

RESULTS

Seventy-two percent significantly reduced their use of time on bowel emptying after the colostomy. All but one reported being content with the colostomy. Thirty-nine percent reported one or more problems related to the colostomy. Seventy-five percent had a GITT within normal range for able-bodied populations. When disregarding the physical component, QoL was not significantly lower in the total study group compared to a Danish norm group, but significantly lower when compared the subgroup of persons with tetraplegia.

CONCLUSION

A colostomy reduces the time necessary for bowel management. The majority of individuals with SCI and a colostomy did not perceive bowel management as being a problem. The results indicate that colostomy is a favourable option for individuals with SCI, who spend long hours on bowel management and for whom non-invasive procedures did not improve the situation enough.

Ultrasonic measurement of rectal diameter and area in neurogenic bowel with spinal cord injury

OBJECTIVE

The aim of this study was to determine the efficacy of measuring the diameter and area of the rectum using ultrasonography as an additional parameter for the evaluation of neurogenic bowel in patients with spinal cord injury (SCI).

PARTICIPANTS

In total, 32 patients with SCI (16 patients with upper motor neuron neurogenic bowel (UMNB) and 16 patients with lower motor neuron neurogenic bowel (LMNB)) participated in this study. We divided the patients by the type of neurogenic bowel: UMNB, patients with supraconal lesions and recovery state of spinal shock or LMNB, patients with infraconal/caudal lesions or spinal shock state).

INTERVENTION

Ultrasound was applied on the abdomen and measured the diameter and area of the rectum were measured twice each before and after defecation, respectively.

OUTCOME MEASURE

We compared rectal diameter and area before/after defecation between the two groups, and significant differences were found in both rectal diameter and area before/after defecation in each group.

RESULTS

After defecation, those in the UMNB group had smaller rectal diameters and areas than those in the LMNB group. Significant reduction of rectal diameter and area was observed after defecation as well. The LMNB group showed slightly increased rectal area after defecation, but the increase was not statistically significant.

CONCLUSION

Using ultrasound to measure rectal diameter and area seems helpful for classifying neurogenic bowel types and for understanding the neurogenic bowel among SCI patients with symptoms of neurogenic bowel.

Altered Colorectal Compliance and Anorectal Physiology in Upper and Lower Motor Neurone Spinal Injury May Explain Bowel Symptom Pattern

OBJECTIVES

Supraconal spinal cord injury (SCI) and lower motor neurone spinal cord injury (LMN-SCI) cause bowel dysfunction; colorectal compliance may further define its pathophysiology. The aim of this study was to investigate rectal (RC) and sigmoid (SC) compliance and anorectal physiology parameters, in these subjects.

METHODS

Twenty-four SCI subjects with gut symptoms (14 RC, 10 SC) and 13 LMN-SCI subjects (9 RC, 4 SC) were compared with 20 spinal intact controls (10 RC, 10 SC). Staircase distensions were performed using a barostat. Anorectal manometry, including rectoanal inhibitory reflex (RAIR) measurement, was performed in all. Data presented as mean±standard error (SCI/LMN-SCI vs. controls).

RESULTS

SCI subjects had a higher RC (17.0±1.9 vs. 10.7±0.5 ml/mm Hg, P<0.05) and SC (8.5±0.6 vs. 5.2±0.5 ml/mm Hg, P=0.002). LMN-SCI subjects had a lower RC (7.3±0.7 ml/mm Hg, P=0.0021) while SC was unchanged (8.3±2.2 ml/mm Hg, P>0.05). Anal resting pressure was decreased in SCI (55±5 vs. 79±7 cmH2O, P=0.0102). Anal squeeze pressure was decreased in LMN-SCI (76±13 vs. 154±21 cmH2O, P=0.0158). In SCI and LMN-SCI, the amplitude reduction of the RAIR was greater (62±4% and 70±6% vs. 44±3%, P=0.0007).

CONCLUSIONS

Colorectal compliance abnormalities may explain gut symptoms: increased RC and SC contributing to constipation in SCI, reduced rectal compliance contributing to fecal incontinence (FI) in LMN-SCI. Reduced resting anal pressure in SCI and reduced anal squeeze pressure in LMN-SCI along with a greater RAIR amplitude reduction may be factors in FI. These co-existing abnormalities may explain symptom overlap, and represent future therapeutic targets to ameliorate neurogenic bowel dysfunction.

Optimal Colostomy Placement in Spinal Cord Injury Patients

Barring unusual circumstances, sigmoid colostomy is the optimal technique for management of defecation in spinal cord injury (SCI) patients. We sought to provide evidence that a sigmoid colostomy is not difficult to perform in SCI patients and has better long-term results. The St. Louis Department of Veterans Affairs has a Commission on Accreditation of Rehabilitation Facilities (CARF)–approved SCI Unit. We reviewed the operative notes on all SCI patients who received a colostomy for fecal management by three ASCRS-certified colorectal surgeons at the St. Louis Department of Veterans Affairs from January 1,2007 to November 26, 2012. There were 27 operations for which the recorded indication for surgery suggested that the primary disorder was SCI. Fourteen had traumatic SCI of the thoracic and/or lumbar spine and were evaluable. Of these 14 patients, 12 had laparoscopic sigmoid colostomy and two had open sigmoid colostomy. We encountered one evaluable patient with a remarkably large amount of retroperitoneal bony debris who successfully underwent laparoscopic sigmoid colostomy. In conclusion, sigmoid colostomy is the consensus optimal procedure for fecal management in SCI patients. Laparoscopic procedures are preferred. Care providers should specify sigmoid colostomy when contacting a surgeon.

New pharmacological approaches against chronic bowel and bladder problems in paralytics

Spinal cord injury (SCI) leads generally to an irreversible loss of sensory functions and voluntary motor control below injury level. Cures that could repair SCI and/or restore voluntary walking have not been yet developed nor commercialized. Beyond the well-known loss of walking capabilities, most SCI patients experience also a plethora of motor problems and health concerns including specific bladder and bowel dysfunctions. Indeed, chronic constipation and urinary retention, two significant life-threatening complications, are typically found in patients suffering of traumatic (e.g., falls or car accidents) or non-traumatic SCI (e.g., multiple sclerosis, spinal tumors). Secondary health concerns associated with these dysfunctions include hemorrhoids, abdominal distention, altered visceral sensitivity, hydronephrosis, kidney failure, urinary tract infections, sepsis and, in some cases, cardiac arrest. Consequently, individuals with chronic SCI are forced to regularly seek emergency and critical care treatments when some of these conditions occur or become intolerable. Increasing evidence supports the existence of a novel experimental approach that may be capable of preventing the occurrence or severity of bladder and bowel problems. Indeed, recent findings in animal models of SCI have revealed that, despite paraplegia or tetraplegia, it remains possible to elicit episodes of micturition and defecation by acting pharmacologically or electrically upon specialized lumbosacral neuronal networks, namely the spinal or sacral micturition center (SMC) and lumbosacral defecation center (LDC). Daily activation of SMC and LDC neurons could potentially become, new classes of minimally invasive treatments (i.e., if orally active) against these dysfunctions and their many life-threatening complications.

Outcomes of bowel program in spinal cord injury patients with neurogenic bowel dysfunction

In this study, we aimed to determine gastrointestinal problems associated with neurogenic bowel dysfunction in spinal cord injury patients and to assess the efficacy of bowel program on gastrointestinal problems and the severity of neurogenic bowel dysfunction. Fifty-five spinal cord injury patients were included in this study. A bowel program according to the characteristics of neurogenic bowel dysfunction was performed for each patient. Before and after bowel program, gastrointestinal problems (constipation, difficult intestinal evacuation, incontinence, abdominal pain, abdominal distension, loss of appetite, hemorrhoids, rectal bleeding and gastrointestinal induced autonomic dysreflexia) and bowel evacuation methods (digital stimulation, oral medication, suppositories, abdominal massage, Valsalva maneuver and manual evacuation) were determined. Neurogenic bowel dysfunction score was used to assess the severity of neurogenic bowel dysfunction. At least one gastrointestinal problem was identified in 44 (80%) of the 55 patients before bowel program. Constipation (56%, 31/55) and incontinence (42%, 23/55) were the most common gastrointestinal problems. Digital rectal stimulation was the most common method for bowel evacuation, both before (76%, 42/55) and after (73%, 40/55) bowel program. Oral medication, enema and manual evacuation application rates were significantly decreased and constipation, difficult intestinal evacuation, abdominal distention, and abdominal pain rates were significantly reduced after bowel program. In addition, mean neurogenic bowel dysfunction score was decreased after bowel program. An effective bowel program decreases the severity of neurogenic bowel dysfunction and reduces associated gastrointestinal problems in patients with spinal cord injury.

Outcomes of neurogenic bowel management in individuals living with a spinal cord injury for at least 10 years

OBJECTIVE

To describe bowel management and its outcomes in individuals living with a spinal cord injury (SCI) for at least 10 years.

DESIGN

Cross-sectional multicenter study.

SETTING

Dutch community.

PARTICIPANTS

Individuals (N=258; age range, 28-65y) who acquired their SCI between 18 and 35 years of age, who were at least 10 years post-SCI, and who used a wheelchair for their daily mobility.

INTERVENTIONS

Not applicable.

MAIN OUTCOME MEASURES

The International SCI Bowel Function Basic Data Set, the neurogenic bowel dysfunction (NBD) score, and a single item on satisfaction with bowel management.

RESULTS

Mean time since injury (TSI) was 24±9 years. Seventy-four percent used ≥1 conservative bowel management method, specifically digital evacuation (35%) and mini enemas (31%). Transanal irrigation (TAI) and surgical interventions were used by 11% and 8%, respectively. Perianal problems were reported by 45% of the participants. Severe NBD was present in 36% of all participants and in 40% of those using a conservative method. However, only 14% were (very) dissatisfied with their current bowel management. Dissatisfaction with bowel management was significantly associated with constipation and severe NBD. With increasing TSI, there was a nonsignificant trend observed toward a decline in dissatisfaction with bowel management and a significant decline in severe NBD.

CONCLUSIONS

Although satisfaction rates were high, more than a third of the participants reported severe NBD and perianal problems. Apart from severe NBD, there were no significant associations between bowel problems and TSI. Conservative methods were most often used, but some of these methods were also significantly associated with the presence of severe NBD. Longitudinal research is necessary to provide more knowledge concerning the course of NBD with increasing TSI.

Factors associated with free adult preventive health care utilization among physically disabled people in Taiwan: nationwide population-based study

Background

Few previous studies have specifically addressed the health care utilization situation of the physically disabled. This study aimed to investigate the utilization of free adult preventive health care for physically disabled people and its’ affecting factors.

Methods

The data was obtained from three nationwide databases from 2006 to 2008. This study comprised 329,264 physically disabled people in Taiwan above the age of 40 who had eligible health checks during 2008. We employed descriptive statistics to analyze the use and rate of free preventive health care use by physically disabled adults. Logistic regression analysis was used to explore the factors that affect physically disabled adults’ use of free adult preventive health care.

Results

16.37% of the physically disabled adults used free adult preventive health care. Women (17.66%), married (17.16%), a junior high education level (17.89%), and mildly disabled adults (18.77%) had the highest use rate among various participant subgroups. The variables that significantly influenced the use of free adult preventive health care by the physically disabled included gender, age, education, marital status, urbanization of the residence areas, monthly payroll, aboriginal status, catastrophic illnesses status, relevant chronic diseases, and severity of disability.

Conclusions

Physically disabled using preventive health care tend to be low. Governments should use the media to reinforce propagation and education of these services to specific, low-utilization groups, and encourage doctors to actively provide preventive health care to communities.

Electronic supplementary material

The online version of this article (doi:10.1186/s12913-014-0610-5) contains supplementary material, which is available to authorized users.

A prospective trial of temporary sacral nerve stimulation for constipation associated with neurological disease

AIM

This study assessed the effectiveness of temporary sacral nerve stimulation (SNS) in patients with constipation associated with neurological disease using an off-on-off design, and evaluated the long-term response in patients undergoing permanent SNS.

METHOD

Patients with chronic constipation associated with neurological disease receiving specialist clinic care at the University Hospital North Durham over a 2-year period were recruited to a trial of SNS. Recordings of bowel function were made for 6 weeks (baseline) and a temporary electrode was then inserted and recordings were made for the next 3 weeks (stimulation). The electrodes were then removed and assessment was continued for a further 3 weeks (posttreatment). Patient-completed questionnaires were used to determine the severity of constipation (Global Assessment of Symptoms, Constipation, GA Constipation), symptoms (Patient Assessment of Constipation Symptoms score, PAC-SYM) and quality-of-life (Patient Assessment of Constipation-Quality Of Life score, PAC-QOL; European Quality of Life-Five-Domain score; European Quality of Life-Visual Analogue Score). Information was obtained on bowel function and medication. Physiological data were also available for transit and laser Doppler flow cytometry to measure mucosal blood flow.

RESULTS

Twenty-two patients were recruited, of whom 18 completed the trial. GA Constipation reduced significantly during temporary SNS: -1.09 (95% CI -1.59 to -0.59; P = 0.0003). PAC-SYM and PAC-QOL scores showed similar improvements. There was also a significant fall in the time spent in the toilet (P = 0.04) and a decrease in laxative use (P = 0.03). Twelve (67%) patients responded to temporary SNS and received a permanent implant with long-term success in 50%.

CONCLUSION

Sacral nerve stimulation can be effective in treating some patients with refractory severe neuroconstipation. A response to temporary SNS may predict long-term benefit in only half the patients undergoing permanent SNS.

Management of faecal incontinence and constipation in adults with central neurological diseases

BACKGROUND

People with central neurological disease or injury have a much higher risk of both faecal incontinence and constipation than the general population. There is often a fine line between the two symptoms, with any management intended to ameliorate one risking precipitating the other. Bowel problems are observed to be the cause of much anxiety and may reduce quality of life in these people. Current bowel management is largely empirical, with a limited research base. This is an update of a Cochrane review first published in 2001 and subsequently updated in 2003 and 2006. The review is relevant to individuals with any disease directly and chronically affecting the central nervous system (post-traumatic, degenerative, ischaemic or neoplastic), such as multiple sclerosis, spinal cord injury, cerebrovascular disease, Parkinson's disease and Alzheimer's disease.

OBJECTIVES

To determine the effects of management strategies for faecal incontinence and constipation in people with a neurological disease or injury affecting the central nervous system.

SEARCH METHODS

We searched the Cochrane Incontinence Group Trials Register (searched 8 June 2012), which includes searches of the Cochrane Central Register of Controlled Trials (CENTRAL), MEDLINE and MEDLINE In-Process as well as handsearching of journals and conference proceedings; and all reference lists of relevant articles.

SELECTION CRITERIA

Randomised and quasi-randomised trials evaluating any type of conservative or surgical intervention for the management of faecal incontinence and constipation in people with central neurological disease or injury were selected. Specific therapies for the treatment of neurological diseases that indirectly affect bowel dysfunction were also considered.

DATA COLLECTION AND ANALYSIS

At least two review authors independently assessed the risk of bias of eligible trials and independently extracted data from the included trials using a range of pre-specified outcome measures.

MAIN RESULTS

Twenty trials involving 902 people were included. Oral medications There was evidence from individual small trials that people with Parkinson's disease had a statistically significant improvement in the number of bowel motions or successful bowel care routines per week when fibre (psyllium) (mean difference (MD) -2.2 bowel motions, 95% confidence interval (CI) -3.3 to -1.4) or oral laxative (isosmotic macrogol electrolyte solution) (MD 2.9 bowel motions per week, 95% CI 1.48 to 4.32) are used compared with placebo. One trial in people with spinal cord injury showed statistically significant improvement in total bowel care time comparing intramuscular neostigmine-glycopyrrolate (anticholinesterase plus an anticholinergic drug) with placebo (MD 23.3 minutes, 95% CI 4.68 to 41.92).Five studies reported the use of cisapride and tegaserod in people with spinal cord injuries or Parkinson's disease. These drugs have since been withdrawn from the market due to adverse effects; as they are no longer available they have been removed from this review. Rectal stimulants One small trial in people with spinal cord injuries compared two bisacodyl suppositories, one polyethylene glycol-based (PGB) and one hydrogenated vegetable oil-based (HVB). The trial found that the PGB bisacodyl suppository significantly reduced the mean defaecation period (PGB 20 minutes versus HVB 36 minutes, P < 0.03) and mean total time for bowel care (PGB 43 minutes versus HVB 74.5 minutes, P < 0.01) compared with the HVB bisacodyl suppository.Physical interventions There was evidence from one small trial with 31 participants that abdominal massage statistically improved the number of bowel motions in people who had a stroke compared with no massage (MD 1.7 bowel motions per week, 95% CI 2.22 to 1.18). A small feasibility trial including 30 individuals with multiple sclerosis also found evidence to support the use of abdominal massage. Constipation scores were statistically better with the abdominal massage during treatment although this was not supported by a change in outcome measures (for example the neurogenic bowel dysfunction score).One small trial in people with spinal cord injury showed statistically significant improvement in total bowel care time using electrical stimulation of abdominal muscles compared with no electrical stimulation (MD 29.3 minutes, 95% CI 7.35 to 51.25).There was evidence from one trial with a low risk of bias that for people with spinal cord injury transanal irrigation, compared against conservative bowel care, statistically improved constipation scores, neurogenic bowel dysfunction score, faecal incontinence score and total time for bowel care (MD 27.4 minutes, 95% CI 7.96 to 46.84). Patients were also more satisfied with this method.Other interventions In one trial in stroke patients, there appeared to be a short term benefit (less than six months) to patients in terms of the number of bowel motions per week with a one-off educational intervention from nurses (a structured nurse assessment leading to targeted education versus routine care), but this did not persist at 12 months. A trial in individuals with spinal cord injury found that a stepwise protocol did not reduce the need for oral laxatives and manual evacuation of stool.Finally, one further trial reported in abstract form showed that oral carbonated water (rather than tap water) improved constipation scores in people who had had a stroke.

AUTHORS' CONCLUSIONS

There is still remarkably little research on this common and, to patients, very significant issue of bowel management. The available evidence is almost uniformly of low methodological quality. The clinical significance of some of the research findings presented here is difficult to interpret, not least because each intervention has only been addressed in individual trials, against control rather than compared against each other, and the interventions are very different from each other.There was very limited evidence from individual trials in favour of a bulk-forming laxative (psyllium), an isosmotic macrogol laxative, abdominal massage, electrical stimulation and an anticholinesterase-anticholinergic drug combination (neostigmine-glycopyrrolate) compared to no treatment or controls. There was also evidence in favour of transanal irrigation (compared to conservative management), oral carbonated (rather than tap) water and abdominal massage with lifestyle advice (compared to lifestyle advice alone). However, these findings need to be confirmed by larger well-designed controlled trials which should include evaluation of the acceptability of the intervention to patients and the effect on their quality of life.

Management of faecal incontinence and constipation in adults with central neurological diseases

BACKGROUND

People with central neurological disease or injury have a much higher risk of both faecal incontinence and constipation than the general population. There is often a fine line between the two symptoms, with any management intended to ameliorate one risking precipitating the other. Bowel problems are observed to be the cause of much anxiety and may reduce quality of life in these people. Current bowel management is largely empirical, with a limited research base. This is an update of a Cochrane review first published in 2001 and subsequently updated in 2003 and 2006. The review is relevant to individuals with any disease directly and chronically affecting the central nervous system (post-traumatic, degenerative, ischaemic or neoplastic), such as multiple sclerosis, spinal cord injury, cerebrovascular disease, Parkinson's disease and Alzheimer's disease.

OBJECTIVES

To determine the effects of management strategies for faecal incontinence and constipation in people with a neurological disease or injury affecting the central nervous system.

SEARCH METHODS

We searched the Cochrane Incontinence Group Trials Register (searched 8 June 2012), which includes searches of the Cochrane Central Register of Controlled Trials (CENTRAL), MEDLINE and MEDLINE In-Process as well as handsearching of journals and conference proceedings; and all reference lists of relevant articles.

SELECTION CRITERIA

Randomised and quasi-randomised trials evaluating any type of conservative or surgical intervention for the management of faecal incontinence and constipation in people with central neurological disease or injury were selected. Specific therapies for the treatment of neurological diseases that indirectly affect bowel dysfunction were also considered.

DATA COLLECTION AND ANALYSIS

Two review authors independently assessed the risk of bias of eligible trials and independently extracted data from the included trials using a range of pre-specified outcome measures.

MAIN RESULTS

Twenty trials involving 902 people were included.Oral medicationsThere was evidence from individual small trials that people with Parkinson's disease had a statistically significant improvement in the number of bowel motions or successful bowel care routines per week when fibre (psyllium) (mean difference (MD) -2.2 bowel motions, 95% confidence interval (CI) -3.3 to -1.4) or oral laxative (isosmotic macrogol electrolyte solution) (MD 2.9 bowel motions per week, 95% CI 1.48 to 4.32) are used compared with placebo. One trial in people with spinal cord injury showed statistically significant improvement in total bowel care time comparing intramuscular neostigmine-glycopyrrolate (anticholinesterase plus an anticholinergic drug) with placebo (MD 23.3 minutes, 95% CI 4.68 to 41.92).Five studies reported the use of cisapride and tegaserod in people with spinal cord injuries or Parkinson's disease. These drugs have since been withdrawn from the market due to adverse effects; as they are no longer available they have been removed from this review.Rectal stimulantsOne small trial in people with spinal cord injuries compared two bisacodyl suppositories, one polyethylene glycol-based (PGB) and one hydrogenated vegetable oil-based (HVB). The trial found that the PGB bisacodyl suppository significantly reduced the mean defaecation period (PGB 20 minutes versus HVB 36 minutes, P < 0.03) and mean total time for bowel care (PGB 43 minutes versus HVB 74.5 minutes, P < 0.01) compared with the HVB bisacodyl suppository.Physical interventionsThere was evidence from one small trial with 31 participants that abdominal massage statistically improved the number of bowel motions in people who had a stroke compared with no massage (MD 1.7 bowel motions per week, 95% CI 2.22 to 1.18). A small feasibility trial including 30 individuals with multiple sclerosis also found evidence to support the use of abdominal massage. Constipation scores were statistically better with the abdominal massage during treatment although this was not supported by a change in outcome measures (for example the neurogenic bowel dysfunction score).One small trial in people with spinal cord injury showed statistically significant improvement in total bowel care time using electrical stimulation of abdominal muscles compared with no electrical stimulation (MD 29.3 minutes, 95% CI 7.35 to 51.25).There was evidence from one trial with a low risk of bias that for people with spinal cord injury transanal irrigation, compared against conservative bowel care, statistically improved constipation scores, neurogenic bowel dysfunction score, faecal incontinence score and total time for bowel care (MD 27.4 minutes, 95% CI 7.96 to 46.84). Patients were also more satisfied with this method.Other interventionsIn one trial in stroke patients, there appeared to be a short term benefit (less than six months) to patients in terms of the number of bowel motions per week with a one-off educational intervention from nurses (a structured nurse assessment leading to targeted education versus routine care), but this did not persist at 12 months. A trial in individuals with spinal cord injury found that a stepwise protocol did not reduce the need for oral laxatives and manual evacuation of stool.Finally, one further trial reported in abstract form showed that oral carbonated water (rather than tap water) improved constipation scores in people who had had a stroke.

AUTHORS' CONCLUSIONS

There is still remarkably little research on this common and, to patients, very significant issue of bowel management. The available evidence is almost uniformly of low methodological quality. The clinical significance of some of the research findings presented here is difficult to interpret, not least because each intervention has only been addressed in individual trials, against control rather than compared against each other, and the interventions are very different from each other.There was very limited evidence from individual trials in favour of a bulk-forming laxative (psyllium), an isosmotic macrogol laxative, abdominal massage, electrical stimulation and an anticholinesterase-anticholinergic drug combination (neostigmine-glycopyrrolate) compared to no treatment or controls. There was also evidence in favour of transanal irrigation (compared to conservative management), oral carbonated (rather than tap) water and abdominal massage with lifestyle advice (compared to lifestyle advice alone). However, these findings need to be confirmed by larger well-designed controlled trials which should include evaluation of the acceptability of the intervention to patients and the effect on their quality of life.

Frequency and age effects of secondary health conditions in individuals with spinal cord injury: a scoping review

STUDY DESIGN

Scoping review.

OBJECTIVES

To gain a better understanding of the prevalence, course and association with age of secondary health conditions in individuals with spinal cord injury (SCI).

SETTING

Seattle, Washington, USA.

METHODS

We performed searches of electronic databases for studies published from 1986-2011 that provided information regarding the prevalence, course or associations with age and duration of secondary health conditions in individuals with SCI.

RESULTS

Ninety-two studies were included. The findings indicate that: (1) individuals with SCI experience a number of secondary health conditions, many of which occur at a higher rate in those with SCI than the normative population; (2) the most common conditions or symptoms are pain, bowel and bladder regulation problems, muscle spasms, fatigue, esophageal symptom and osteoporosis; (3) a number of conditions, including cardiovascular disease, diabetes, bone mineral density loss, fatigue and respiratory complications or infections, occur with higher frequency in older individuals or those with longer SCI duration, relative to younger individuals or those with shorter SCI duration; and (4) there is a marked lack of longitudinal research examining the natural course of health conditions in individuals aging with SCI.

CONCLUSIONS

The findings support the conclusion that individuals with SCI show signs of 'premature aging' in different organ systems. Longitudinal research is needed to understand when problems are most likely to emerge, and to develop and test the efficacy of interventions to prevent these health conditions and their negative impact.

Surgery for constipation in patients with prior spinal cord injury: the Department of Veterans Affairs experience

OBJECTIVE

Patients with spinal cord injury (SCI) typically have difficulty with constipation. Some undergo surgery for bowel management. We predicted that SCI patients would have higher mortality and/or morbidity rates following such surgery than neurally intact patients receiving the same procedures. We sought to evaluate this using a large population-based data set.

METHODS

Patients receiving care at Department of Veterans Affairs Medical Centers (DVAMCs) with computer codes for SCI and constipation who later underwent colectomy, colostomy, or ileostomy during fiscal years 1993-2002 were identified. Charts were requested from the VAMCs where the surgery had been performed and a retrospective chart review of these charts was done. We collected data on patient demographics, six specific pre-operative co-morbidities, surgical complications, and post-operative mortality. Comparisons were made to current literature evaluating a population receiving total abdominal colectomy and ileorectal anastomosis for constipation but not selected for SCI.

RESULTS

Of 299 patients identified by computer search, 43 (14%) had codes for SCI and 10 of 43 (24%) met our inclusion criteria. All were symptomatic and had received appropriate medical management. Co-morbid conditions were present in 9 of 10 patients (90%). There were no deaths within 30 days. The complication rate was zero. The mean post-operative length of stay was 17 days.

CONCLUSIONS

Patients with SCI comprise about 14% of the population who receive surgery for severe constipation in the Department of Veterans Affairs system. The mortality and morbidity rates in these patients are similar to those reported in other constipated patients who have surgery for intractable constipation. Our data suggest that stoma formation ± bowel resection in patients with SCI is a safe and effective treatment for chronic constipation.

Early recognition of pelvic floor dyssynergia and colorectal assessment in Parkinson's disease associated with bowel dysfunction

AIM

Slow colonic transit time (CTT) and pelvic floor dyssynergia (PFD) are major contributors to constipation in patients with Parkinson's disease (PD). However, no symptom survey yet exists that effectively differentiates the contributing aetiologies. The significance of individual pelvic floor musculature behaviours and their relationship with colorectal dysmotility in constipated patients with PD are still controversial and need further clarification. We aimed to investigate how differentiated constipation-related symptoms of PD patients with constipation may identify constipation groupings and to register the pathophysiological features of the pelvic musculature.

METHOD

Our subjects undertook CTT, defaecography and the Knowles-Eccersley-Scott Symptom questionnaire. The pathological aetiologies were categorized as group 1 (slow CTT) and/or group 2 (puborectalis syndrome) and/or group 3 (pubococcygeus syndrome), in accordance with the CTT and defaecography results.

RESULTS

Constipation-related symptoms such as incomplete evacuation and defaecation difficulty yielded high post-test probabilities (81% and 88%, respectively) in groups 3 and 2, but a low post-test probability in group 1 (58%). Changes in the anorectal angle and perineum descent during straining were significantly correlated with CTT (r = 0.57 and r = 0.61, respectively) and with each other (r = 0.82).

CONCLUSION

Our findings that neural control of the puborectalis and pubococcygeus, along with colorectal peristalsis, were in a similar state of degeneration is key information that should assist physicians to instigate more effective management for colonic dysmotility or PFD.

Abdominal Pain: A Comparison between Neurogenic Bowel Dysfunction and Chronic Idiopathic Constipation

Introduction. Most spinal-cord-injured patients have constipation. One-third develop chronic abdominal pain 10 years or more after injury. Nevertheless, very little is known about the nature of abdominal pain after spinal cord injury (SCI). It may be neuropathic or caused by constipation. Aim. To compare characteristics of abdominal pain in SCI with able-bodied with chronic idiopathic constipation (CIC). Subjects and Methods. 21 SCI and 15 CIC patients were referred for treatment of bowel symptoms. Constipation-related symptoms were assessed with the Cleveland Constipation Scoring System and the International Spinal Cord Injury Basic Bowel Function Data Set. Characteristics of abdominal pain were described using the Brief Danish Pain Questionnaire. Total gastrointestinal transit times (GITT) were measured by radiopaque markers. Results. Seventeen (81%) SCI and 14 (93%) CIC patients reported abdominal pain or discomfort within the last month (P = 0.38). Pain was considered more intense by CIC than by SCI patients (P < 0.05). Only minor differences were found in patient's qualitative description of abdominal pain or in the location of pain. In neither SCI nor CIC was pain associated with GITT. Conclusion. Most characteristics of abdominal pain among SCI patients resemble those of CIC. This indicates that constipation is a major cause of pain after SCI.

Do the urinary bladder and large bowel interact, in sickness or in health? ICI-RS 2011

Normal functioning of the urinary bladder and the distal gut is an essential part of daily physiological activity coordinated by the peripheral and central nervous systems. Pathological changes in one of these organs may induce the development of cross-organ sensitization in the pelvis and underlie clinical co-morbidity of genitourinary and GI dysfunctions. Experimental human and animal data suggest that the bladder and distal colon interact under both normal and pathological conditions, however, the directions of these interactions can change dramatically depending on the nature and duration of the applied stimuli. This review article aimed to summarize the clinical data on colon-bladder cross-reflexes in healthy individuals, as well as in patients with co-morbid disorders. It also discusses currently used animal models, experimental approaches, and suggested mechanisms of colon-bladder cross-talk. Additionally, it provides an overview of the potential pharmacological targets to develop treatment options for patients with co-morbid disorders. Presented work resulted from the discussion of colon/bladder interactions during "Think Tank 9" presentations at the International Consultation on Incontinence Research Society meeting held in Bristol, UK, 2011.

Comparison of nutritional intake between individuals with acute and chronic spinal cord injury

OBJECTIVE

To compare the nutritional intake of patients with acute and chronic spinal cord injury (SCI).

DESIGN

Cross-sectional, observational study.

SETTING

Spinal cord unit.

METHODS

Twelve in-house patients of a spinal cord unit with acute SCI and paralysis duration of 5.3 ± 2.5 months (acute group) were compared with 12 subjects with chronic SCI (chronic group) with lesion duration of 55.5 ± 21.0 months. All subjects recorded their nutritional intake for 7 days, which was analyzed for intake of energy, proteins, fat, carbohydrates, vitamins, mineral nutrients, fluid, and dietary fiber. Resting energy expenditure (REE) and total body fat were also determined.

RESULTS

The chronic group showed a significantly higher total body fat content compared to the acute group (19.4 ± 3.8 vs. 15.7 ± 4.3%). All other parameters were not significantly different between groups. Both groups ingested excessive fat and insufficient amounts of carbohydrates compared with common nutritional recommendations. Low intakes of vitamins C, D, E, biotin, folic acid, as well as potassium and iron were found.

CONCLUSIONS

No differences were found in the nutritional intakes of two comparable groups of subjects with acute and chronic SCI. Independent of lesion duration, subjects with SCI showed considerable deviations from the general accepted nutritional recommendations concerning macro- and micronutrients intake. Professional nutritional education for persons with SCI should start as soon as possible after injury to prevent nutrition-related secondary complications like cardiovascular diseases. Periodic determinations of body fat content and REE combined with a physical activity program might be helpful as well.

Translumbar and transsacral motor-evoked potentials: a novel test for spino-anorectal neuropathy in spinal cord injury

OBJECTIVES

Spinal cord injury (SCI) causes anorectal problems, whose pathophysiology remains poorly characterized. A comprehensive method of evaluating spino-anorectal function is lacking. The aim of this study was to investigate the neuropathophysiology of bowel dysfunction in SCI by evaluating motor-evoked potentials (MEP) of anus and rectum following transspinal magnetic stimulation and anorectal physiology.

METHODS

Translumbar and transsacral magnetic stimulations, anorectal manometry, and pudendal nerve terminal motor latency (PNTML) were performed in 39 subjects with SCI and anorectal problems and in 14 healthy controls, and data were compared. MEPs were recorded with an anorectal probe containing bipolar ring electrodes.

RESULTS

The MEPs were significantly prolonged (P<0.05) bilaterally, and at lumbar and sacral levels, as well as at rectal and anal sites in SCI subjects compared with controls. A total of 95% of SCI subjects had abnormal MEPs and 53% had abnormal PNTML. All subjects with abnormal PNTML also demonstrated abnormal MEP, but 16/17 subjects with normal PNTML had abnormal MEP. Overall, SCI patients had weaker anal sphincters (P<0.05), higher prevalence of dyssynergia (85%), and altered rectal sensation (82%).

CONCLUSIONS

Translumbar and transsacral MEPs revealed significant and hitherto undetected lumbosacral neuropathy in 90% of SCI subjects. Test was safe and provided neuropathophysiological information that could explain bowel dysfunction in SCI subjects.

Anorectal function and the effect of biofeedback therapy in ambulatory spinal cord disease patients having constipation

OBJECTIVE

Constipation in patients with mild spinal cord disease is not well investigated yet. We aimed to investigate anorectal function and the effect of biofeedback therapy in constipated patients with mild spinal cord diseases.

MATERIAL AND METHODS

A total of 14 constipated patients with myelopathy and 32 with radiculopathy were enrolled retrospectively. All patients were able to walk independently. The control group comprised of 100 constipated patients without any neurologic problem. Colonic transit time and the presence of dyssynergia were assessed before biofeedback therapy. All patients answered structured questionnaires on constipation, before and after biofeedback therapy.

RESULTS

The mean rectosigmoid colonic transit time of the myelopathy group was significantly delayed (myelopathy, 18.6 ± 14.6 h; radiculopathy, 12.8 ± 11.9 h; control, 9.6 ± 11.2 h; p = 0.032). Delay in total colonic transit time was more frequent in the myelopathy group (myelopathy, 57.1%; radiculopathy, 23.3%; control, 18.5%; p = 0.004). On anorectal manometry, the squeezing pressure of the anal sphincter was decreased in the myelopathy group (myelopathy, 132.3 ± 73.3 mmHg; radiculopathy, 179.9 ± 86.1 mmHg; control 200.4 ± 82.4 mmHg; p < 0.05). The success rate of biofeedback therapy was lower in the myelopathy group (28.6% for myelopathy vs. 62.0% for control group; p = 0.034). The response rate to biofeedback therapy was similar between radiculopathy and control group (62.5% for radiculopathy vs. 62.0% for control group; p = 1.000).

CONCLUSIONS

In constipation associated with mild myelopathy, delayed colonic transit and dyssynergic defecation were major pathophysiologic abnormalities and biofeedback was less effective compared with control group. However, in the radiculopathy group, biofeedback was as effective as in the control group.

How do patients with chronic spinal injury in Pakistan manage their bowels? A cross-sectional survey of 50 patients

STUDY DESIGN

A cross-sectional survey.

OBJECTIVES

To document bowel care practices of chronic spinal cord injury (SCI) patients in Pakistan.

SETTINGS

Outpatient Department, Armed Forces Institute of Rehabilitation Medicine, Rawalpindi, Pakistan.

METHODS

A total of 50 adult patients (18-65 years) with SCI of duration >12 months were sampled by convenience sampling. Medical record was reviewed, detailed neurological examination was performed and face-to-face semistructured interviews were conducted. Data were collected and analysed using SPSS v10. Frequencies and descriptive statistics were calculated for the various variables.

RESULTS

Most of the patients (29) were males. The mean age was 33±11 years. Majority of the patients (76%) had thoracic-level injury. In all, 43 patients gave a history of occasional or regular faecal incontinence. In addition, 17 patients reported the regular use of laxatives whereas 22 used bulk-forming agents on a regular basis. Majority of the patients (56%) had at least one bowel evacuation daily. In addition, 31 patients required 16-30 min to complete the bowel evacuation. Approximately half (54%) required assistance in bowel evacuation.

CONCLUSION

A large number of patients with chronic SCI in Pakistan had faecal incontinence. A majority of patients used methods such as suppositories, laxatives and bulk-forming agents to control the frequency and duration of the bowel programme. Adherence to standard bowel care programme and practices are influenced by sociocultural factors and lack of education on the part of the patients.

Prediction of severe neurogenic bowel dysfunction in persons with spinal cord injury

STUDY DESIGN

Cross-sectional study.

OBJECTIVE

To analyze the predictors of severe neurogenic bowel dysfunction (NBD) in persons with spinal cord injury (SCI).

SETTING

The Kaohsiung Medical University Hospital, Taiwan.

METHODS

Two questionnaires-the NBD score and the Beck Depression Inventory second edition-were sent to 232 persons with SCI by mail. The demographic factors and injury-related factors were recorded to evaluate any relationships with severe NBD. The associations between the severity of NBD and psychological condition were also measured.

RESULTS

In all, 39.4% of the respondents suffered from severe NBD. Multiple logistic regression analysis showed that those with a cervical injury (odds ratios (OR)=10.5, 95% confidence interval (CI) 1.6-67.7) or a thoracic injury (OR=7.1, 95% CI 1.2-40.3) had a higher risk of severe NBD than those with a lumbar injury. Persons with American Spinal Injury Association (ASIA) A had a 12.8-fold higher risk of severe NBD than persons with ASIA D (OR=12.8, 95% CI 3.3-50.1). Longer duration of injury (> or =10 years) was another risk factor of severe NBD. Moderate-to-severe depression was associated with reduced bowel function.

CONCLUSIONS

This study showed that high level of cord lesion, completeness of cord injury and longer duration of injury (> or =10 years) could predict the severity of NBD in patients with SCI.

Rectal evacuation and antegrade colonic luminal transport by sacral anterior root stimulation in pigs

PURPOSE

Electrical sacral anterior root stimulation with a selective anodal block may relieve difficulties with bowel evacuation by selective colorectal activation and anal sphincter suppression. This study compares rectal evacuation induced by anodal block with that induced by unselective stimulation.

METHODS

The sacral anterior roots were stimulated with cuff electrodes in seven chloralose-anesthetized minipigs. Anodal block and unselective stimulation were applied in random order and compared by anorectal manometry and by the obtained colorectal evacuation. Evacuation was quantified scintigraphically after retrograde radioactive paste installation.

RESULTS

Unselective stimulation evoked sphincter activation which obstructed rectal evacuation during the 30-second stimulation period, after which poststimulation evacuation occurred (mean, 13%; P < 0.05). Anodal block reduced the anal canal pressure by median 83% compared with unselective stimulation. With unrestrained evacuation, a different evacuation pattern (mean, 18%; P < 0.05) occurred within the first ten seconds of the stimulation period and evacuated volume was higher (P = 0.08). Colonic evacuation reached a mean of 17% with unselective stimulation and 11% with anodal block.

CONCLUSION

Anodal block and unselective sacral root stimulation induce rectal evacuation and colonic luminal transport in pigs. However, anodal block may improve stimulation-induced defecation by enabling a near-physiologic defecation pattern.

Clinical outcome of sacral neuromodulation in incomplete spinal cord-injured patients suffering from neurogenic bowel dysfunctions

STUDY DESIGN

Retrospective study.

OBJECTIVES

Efficacy and safety of sacral neuromodulation (SNM) in incomplete spinal cord-injured patients (SCIPs) affected by chronic neurogenic bowel symptoms (NBSs).

SETTING

Neurourology Department. Primary to tertiary care.

METHODS

Retrospective non-blinded study without controls. Thirty-nine SCIPs were submitted to temporary stimulation for NBS. Permanent implantation was carried out if both their NBSs improved and the Wexner questionnaire scores were reduced by at least 50% during the first stage compared with that at baseline. Outcome measures included episodes of fecal incontinence and number of evacuations per week, as well as the Wexner score and the Short Form 36 (SF-36) Health Survey questionnaire.

RESULTS

Twenty-three SCIPs were submitted to definitive SNM, maintaining their clinical benefits after permanent implantation with a median follow-up of 38 months. The length of time since neurological diagnosis to SNM therapy represents the only factor related to the success of the implantation, P<0.05. In subjects with constipation (12), the median number of evacuations shifted from 1.65 to 4.98 per week, whereas the Wexner score changed from 19.91 to 6.82 in the final checkup with P<0.05. In subjects with fecal incontinence (11), the median number of episodes per week in the final follow-up was 1.32 compared with 4.55 pre-SNM. The general and mental health of both groups was measured with the SF-36 questionnaire and consistently showed statistical improvement (P<0.05).Anorectal manometry showed no important variation compared with baseline. There were no major complications.

CONCLUSIONS

SNM therapy should be considered for the treatment of NBS for select patients with incomplete spinal cord injury when conservative treatments fail.

Neurogenic colorectal and pelvic floor dysfunction

Constipation and faecal incontinence are common symptoms among patients with spinal cord injury (SCI), myelomeningocoele (MMC), multiple sclerosis (MS), Parkinson's disease (PD) and stroke. Faecal incontinence in SCI, MMC and MS is mainly due to abnormal rectosigmoid compliance and rectoanal reflexes, loss of rectoanal sensibility and loss of voluntary control of the external anal sphincter. Constipation in SCI, MMC and MS is probably due to immobilisation, abnormal colonic contractility, tone and rectoanal reflexes or side effects from medication. In PD, dystonia of the external anal sphincter causes difficult rectal evacuation and the loss of dopaminergic neurons in the enteric nervous system probably causes slow-transit constipation. Changes after stroke remain to be studied. Though dietary adjustments, oral laxatives, suppositories and other conservative treatment modalities are commonly used, evidence for their use in patients with central neurological disorders is scarce. For patients with severe symptoms trans-anal irrigation, the Malone appendicostomy or a colostomy can be recommended.

Reproducibility and validity of radiographically determined gastrointestinal and segmental colonic transit times in spinal cord-injured patients

BACKGROUND

Total gastrointestinal transit times (GITT) and segmental colonic transit times (CTT) are commonly used to describe bowel function in individuals with spinal cord injury (SCI).

STUDY DESIGN

Reproducibility study.

OBJECTIVES

To describe inter- and intrasubjective as well as interobserver variations in GITT and segmental CTT in patients with SCI. Furthermore, to study associations between GITT or segmental CTT and colorectal symptoms.

SETTING

Spinal Cord Unit, Viborg Hospital, Denmark.

METHODS

Thirty SCI patients took 10 radio-opaque markers on 6 consecutive days and an abdominal X-ray was taken on day 7. The same procedure was repeated after 3 months. GITT and CTT were computed from the number of markers in the entire colorectum and in the left and the right colon. Intra- and interobserver variations were described as dispersion (numerical difference/mean).

RESULTS

Intersubjective variation was large for GITT (range: 0.6-6.3 days), right CTT (range: 0.1-5.5 days) and left CTT (range: 0-4.9 days). Intrasubjective variation was acceptable for GITT (dispersion: 0.28) but less good for right (dispersion: 0.63) and left CTT (dispersion: 0.68). Interobserver variation was very small. No correlations were found between GITT, right or left CTT and colorectal symptoms.

CONCLUSION

GITT and right and left CTT are of limited value for clinical decision-making in individual patients but may be useful for comparison of groups of patients with SCI.

Optimal treatment for severe neurogenic bowel dysfunction after chronic spinal cord injury: a decision analysis

BACKGROUND

When conservative management fails in patients with chronic spinal cord injury (SCI) and neurogenic bowel dysfunction, clinicians have to choose from a variety of treatment options which include colostomy, ileostomy, Malone anterograde continence enema (MACE) and sacral anterior root stimulator (SARS) implantation. This study employed a decision analysis to examine the optimal treatment for bowel management of young individuals with chronic refractory constipation in the setting of chronic SCI.

METHODS

A decision analysis was created to compare the four surgical strategies using baseline analysis, one-way and two-way sensitivity analyses, 'worst scenario' and 'best scenario' sensitivity analyses, and probabilistic sensitivity analyses. Quality-adjusted life expectancy (QALE) was the primary outcome.

RESULTS

The baseline analysis indicated that patients who underwent the MACE procedure had the highest QALE value compared with the other interventions. Sensitivity analyses showed that these results were robust.

CONCLUSION

The MACE procedure may provide the best long-term outcome in terms of the probability of improving bowel function, reducing complication rates and the incidence of autonomic dysreflexia, and being congruent with patients' preferences. The analysis was sensitive to changes in assumptions about quality of life/utility, and thus the results could change if more specific estimates of utility became available.