Anal physiology testing in fecal incontinence: is it of any value?

The Functional Luminal Imaging Probe (FLIP): A Good Tool for Adjustment of anal Canal Dimensions During Operative Management of Fecal Incontinence

PURPOSE

Fecal incontinence is a troublesome problem in the field of colorectal surgery. The main aim of this study was to adjust the anal canal resistance during operative management of anal incontinence using Endo-FLIP.

METHODS

This was a prospective cohort study held at Cairo university hospital. Hundred forty-eight incontinent patients treated by different surgical procedures were included. During the procedure the Endo-FLIP was applied to adjust the anal canal dimensions (ACL and ACD) so the ACR could be adjusted based on the flow equation. These were also assessed pre-operatively with Endo-FLIP system and the flow equation calculator. The clinical severity of the disease and outcome after surgical procedures were assessed and correlated to the physiologic parameters.

RESULTS

ACL, ACD and ACR had had significant correlations to the degree of incontinence (P < .001). ACL, ACD and ACR showed statistically significant change with primary repair and gluteus maximus transposition operations. After treatment of fecal incontinence, in good responders' group, the mean resting anal canal resistance increased significantly to 4649.05 ± 1161.49 (postoperative) while in poor responders' group it was 1919.9 ± 1077.73.

CONCLUSIONS

The Endo-flip can be used to measure the anal canal geometric parameters (ACL and ACD) and then anal canal resistance could be calculated by the flow equation - pre-and post-operatively- which help the adjustment of the surgical repair of sphincter injury in fecal incontinence patients which may improve the surgical outcome.

Administration of an Anal Bulking Agent With Polyacrylate-Polyalcohol Copolymer Particles Versus Endoanal Electrical Stimulation With Biofeedback for the Management of Mild and Moderate Anal Incontinence: A Randomized Prospective Study

BACKGROUND

There are few treatment options for mild-to-moderate anal incontinence with isolated internal anal sphincter defects or anal incontinence without muscle damage. Less-invasive techniques are generally favored.

OBJECTIVE

To compare the results between the use of an anal bulking agent with polyacrylate-polyalcohol copolymer particles and endoanal electrical stimulation with biofeedback in patients with mild or moderate anal incontinence.

DESIGN

This was a prospective parallel-group, single-institution, randomized clinical trial.

SETTINGS

This study was conducted in an ambulatory setting at the Colorectal Physiology Service of the Hospital das Clinicas, Medical School, University of Sao Paulo.

PATIENTS

This study included patients who had anal incontinence for >6 months with isolated internal anal sphincter muscle damage or absence of anatomical defects in the anorectal sphincter complex.

INTERVENTIONS

Anal bulking agent and endoanal electrical stimulation with biofeedback.

MAIN OUTCOME MEASURES

The primary outcome measure was the Cleveland Clinic Florida Fecal Incontinence Score, and the secondary outcome measures included quality of life, recommended procedures, and anorectal manometry.

RESULTS

There were no significant between-group differences in mean age, sex, BMI, stool consistency, and Cleveland Clinic Florida Fecal Incontinence Score (p = 0.20) at baseline. After 12 months, the Cleveland Clinic Florida Fecal Incontinence Score was found to be significantly improved in patients treated with the bulking agent compared to those treated with electrical stimulation (mean, 6.2 vs 9.2; p = 0.002), though the anorectal manometry parameters did not change significantly. The mean anal Cleveland Clinic Florida Fecal Incontinence Score declined by 4.2 points in the bulking agent group compared to a decline of 0.8 in the electrical stimulation group (mean difference in decline: 3.4 points; 95% CI, 1.2-5.5). Quality-of life evaluation showed similar results between groups comparing baseline parameters with 12-month follow-up.

LIMITATIONS

The short follow-up period of 1 year, atypical method of biofeedback, and unmatched baseline in some of the quality-of-life scales between the 2 groups limited this study.

CONCLUSIONS

In patients with mild or moderate anal incontinence, the Cleveland Clinic Florida Fecal Incontinence Score significantly improved in the bulking agent with polyacrylate-polyalcohol copolymer group compared with the endoanal electrical stimulation with biofeedback group. See Video Abstract at http://links.lww.com/DCR/B938.

ADMINISTRACIN DE UN GEL ANAL CON PARTCULAS DE COPOLMERO DE POLIACRILATOPOLIALCOHOL VERSUS ESTIMULACIN ELCTRICA ENDOANAL CON EJERCICIOS ANALES BIOFEEDBACK PARA EL MANEJO DE LA INCONTINENCIA ANAL LEVE Y MODERADA UN ESTUDI PROSPECTIVO ALEATORIZADO

ANTECEDENTES:Hasta la fecha, existen pocas opciones de tratamiento para la incontinencia anal de leve a moderada con defectos aislados del esfínter anal interno o la incontinencia anal sin daño muscular. Por lo general, se prefieren técnicas menos invasivas.OBJETIVO:El objetivo fue comparar los resultados entre el uso de un gel intra-anal con partículas de copolímero de poliacrilato-polialcohol y la estimulación eléctrica endoanal con ejercicios anales en pacientes con incontinencia anal leve o moderada.DISEÑO:Este fue un ensayo clínico aleatorio prospectivo de grupos paralelos, de una institución, realizado en cuatro etapas: base, procedimientos, postratamiento temprano y tardío.AJUSTE:Este estudio se realizó en el ambulatorio de Fisiología Colorrectal del Servicio de Coloproctología del Hospital das Clínicas, Facultad de Medicina, Universidad de São Paulo.PACIENTES:Paciente con incontinencia anal con más de 6 meses, con daño muscular aislado del esfínter anal interno o ausencia de defectos anatómicos en el esfínter anorrectal.INTERVENCIONES:Las intervenciones incluyeron la inyección del gel intra-anal y estimulación eléctrica endoanal con ejercicios anales.PRINCIPALES MEDIDAS DE RESULTADO:Indice de incontinencia fecal (Cleveland Clinic Florida), Indice de calidad de vida, los procedimientos recomendados y la manometría anorrectal.RESULTADOS:No hubo diferencias significativas entre los grupos en cuanto a la edad media, el sexo, el índice de masa corporal, la consistencia de las heces y la puntuación de incontinencia fecal (p = 0,20) al inicio del estudio. Después de 12 meses, la puntuación de incontinencia fecal mejoró significativamente en los pacientes tratados con el el gel intra-anal (media = 6,2) en comparación con los tratados con estimulación eléctrica (media = 9,2; p = 0,002), aunque los parámetros de manometría anorrectal no mejoraron significativamente. La puntuación anal media de incontinencia fecal disminuyó 4,2 puntos en el grupo del Gel intra-anal en comparación con 0,8 en el grupo de estimulación eléctrica (diferencia media en la disminución: 3,4 puntos; IC del 95%: 1,2 a 5,5). La evaluación de la calidad de vida mostró resultados similares entre los grupos que compararon los parámetros iniciales con un seguimiento de 12 meses.LIMITACIONES:Breve período de seguimiento de un año, métodos diferentes de ejercicios anales y línea de base sin igual en algunas de las escalas de calidad de vida entre los dos grupos.CONCLUSIONES:En pacientes con incontinencia anal leve y moderada, la puntuación de incontinencia fecal mejoró significativamente en el grupo de gel intra-anal con copolímero de poliacrilato-polialcohol en comparación con la estimulación eléctrica endoanal. Consulte Video Resumen en http://links.lww.com/DCR/B938. (Traducción- Dr Leonardo Alfonso Bustamante-Lopez).

Usefulness of An Anal Sphincter Injury Mouse Model by Means of a Balloon Catheter and a New Method of Evaluating Anal Sphincter Function

BACKGROUND

The incidence of fecal incontinence is ~2%, and the associated symptoms significantly impact daily life. New treatment methods including electrical stimulation and regenerative therapy using stem cells for fecal incontinence have been reported. We explored the usefulness of an anal sphincter injury mouse model by means of a balloon catheter and focused on the defecation status of mice as a novel method for evaluating anal function. We examined the utility of the mouse model of anal sphincter injury and the efficacy of electrical stimulation as a treatment modality using this model.

METHODS

A 10-mm balloon catheter was used to create an anal sphincter injury model in mice. Sphincter function was evaluated in the noninjured (n = 4), injured (n = 4), noninjured electrical stimulation (n = 4), and injured electrical stimulation (n = 4) groups. Defecation status (defecation frequency in 24 h and fecal weight per stool) and pathological evaluation were used for comparison.

RESULTS

The defecation frequency increased and the fecal weight per stool decreased significantly in the anal sphincter injury model. Pathological evaluation revealed that anal sphincter tears occurred the day after the injury. Meanwhile, the defecation frequency improved on d 7, and the fecal weight per stool gradually normalized to that of the control group and exhibited significant sphincter muscle hypertrophy in the electrical stimulation group.

CONCLUSION

Anal sphincter injury using a balloon catheter in mice allowed us to create a uniform model. The evaluation of defecation status in mice is a useful method for comparatively evaluating anal function.

Prevalence and risk factors associated with depressive mood in Korean patients with fecal incontinence

Purpose

The study was aimed at assessing the prevalence of depression in individuals with fecal incontinence (FI) and the relationship between the symptoms of depression and the severity of objective test parameters.

Methods

Patients with FI for over 3 months were included in the study. The exclusion criteria were (1) diagnosis or treatment of the pelvic organ prolapse syndrome, (2) previous anorectal surgery, (3) inflammatory bowel disease, (4) previous diagnosis of psychiatric disorder, and (5) inability to read or understand the questionnaire themselves. The questionnaire included the Beck Depression Inventory-II (BDI-II) for measuring depression, and 142 patients were included for analysis.

Results

Of the 142 patients, 34 were males and 108 were females, with a mean age of 67.8 years. The mean duration of FI symptoms was 38.36 months (range, 3-600 months). The mean Cleveland Clinic Incontinence Score and BDI-II were 11.96 ± 4.76 and 12.46 ± 9.84, respectively. The Cleveland Clinic Incontinence Score showed a positive correlation with the BDI-II score (P = 0.005). Of the 142 patients, 99 showed minimal to mild BDI-II scores, and 43 showed moderate-to-severe BDI-II scores. The multivariable logistic regression analysis showed that health insurance status was related to the depression in FI patients.

Conclusion

Mood disorders related to FI are more affected by the severity of the subjective symptoms or the surrounding environment than the objective indicators derived from the test.

Validation of a Novel Fecal Incontinence Scale: The Rapid Assessment Fecal Incontinence Score (RAFIS)

OBJECTIVE

The development and validation of a new version of the fecal incontinence (FI) scale "Rapid Assessment Fecal Incontinence Score" (RAFIS) incorporating domains for severity, type of stool loss, and global perception of the effect of incontinence on quality of life (QoL).

BACKGROUND

FI negatively impacts on QoL. Currently used incontinence questionnaires have outstanding limitations on the global assessment of the impact of the disease on QoL that patients perceive. We developed a new version of RAFIS with a more complete questionnaire.

MATERIALS AND METHODS

A 3-phase study was performed to evaluate the applicability and reliability of our questionnaire as a tool for assessing FI. Our score was completed by 98 patients (78 women; mean age: 57±13 y) who presented with FI and who were referred from 4 colorectal surgery centers. The RAFIS was assessed for internal consistency, test-retest reliability, and sensitivity to change. A multivariate analysis was performed. Comparisons were made with the Wexner Cleveland Clinic Incontinence Score and the Fecal Incontinence Quality of Life Scale.

RESULTS

The RAFIS showed good internal consistency and test-retest reliability, differentiating the severity of incontinence but not the etiology. There was a moderate-high correlation between the new scale and the reference scales. Sensitivity to change, compared with the Wexner Score, was moderate. Comparison with established QoL instruments showed a moderate negative correlation. Logistic regression of the RAFIS discriminated between mild and moderate-severe impact on QoL. No correlation was detected with the new score to the presence of an anal sphincter defect or sphincter hypotonia.

CONCLUSION

The RAFIS scale is easy to administer and compares well with other validated incontinence instruments.

Establishing a peripartum perineal trauma clinic: a narrative review

INTRODUCTION AND HYPOTHESIS

Obstetric anal sphincter injury (OASI) is not rare, and its consequences are multiple and potentially severe, especially for young women. Some dedicated perineal clinics have been established to improve the management of OASI. Despite their obvious importance, these specific clinics are underrepresented and underdeveloped. The objectives of this review are to explore various options for developing a peripartum perineal clinic and to compare the different practices regarding the mode of delivery for subsequent pregnancies after an OASI.

METHODS

This narrative review covers information from patients' questionnaires specific to anal incontinence, anal physiology assessment, pelvic floor and anal sphincter imaging, and the arguments for choosing the mode of delivery after an OASI.

RESULTS

This review highlights the extensive range of practices regarding the delivery mode after an OASI throughout national professional organizations and experienced perineal clinics.

CONCLUSION

This review summarizes the different choices in developing a perineal clinic to facilitate their development in promoting health care and education specific for peripartum women concerning the perineal consequences of delivery for obstetrician-gynaecologists, family doctors, and residents.

The relationships between the results of contemporary tests of anorectal structure and sensorimotor function and the severity of fecal incontinence

BACKGROUND

Diagnostic investigations for fecal incontinence (FI) assess the structure and sensorimotor function of the anorectum. Investigations include anorectal manometry, anorectal sensory testing, pudendal nerve terminal motor latencies (PNTML), and endoanal sonography. The severity of FI and results of investigations are often discordant and the rate of symptom resolution following treatment remains <40%. High-resolution anorectal manometry (HRAM) and three-dimensional endoanal ultrasound (3D-US) have been introduced during the last decade. This study aims to assess the strength of relationships between contemporary investigation results and FI severity.

METHODS

Adults presenting for investigation of FI were assessed using the St Mark's FI severity score (SMIS), HRAM, anorectal sensory testing, PNTML, and 3D-US.

KEY RESULTS

246 patients were included. There were significant relationships between the SMIS and HRAM (resting pressure r_s = -0.23, 95% CI = (-0.34, -0.11), P < .001; squeeze pressure (r_s  = -0.26, 95% CI = (-0.37, -0.14), P < .001) and 3D-US (anterior EAS length r_s = -0.22, 95% CI = (-0.34, -0.09), P = .001). The relationships between SMIS and HRAM had a greater effect size in those with urge-predominant symptoms (resting pressure: r_s = -0.40, 95% CI = (-0.57, -0.20), P < .001, squeeze pressure: r_s = -0.34, 95% CI = (-0.52, -0.12), P = .003). Overall, the variance in SMIS accounted for by anorectal investigations was 8.6% (R² = 0.098, adjusted R² = 0.086, P < .001).

CONCLUSIONS AND INFERENCES

Anorectal investigations are not strong predictors of FI severity. These findings may reflect the multifactorial, heterogeneous pathophysiology of FI, the limitations of the SMIS and anorectal investigations, and contributing factors extrinsic to the anorectum.

Tools for fecal incontinence assessment: lessons for inflammatory bowel disease trials based on a systematic review

BACKGROUND

Fecal incontinence is a disabling condition affecting up to 20% of women.

OBJECTIVE

We investigated fecal incontinence assessment in both inflammatory bowel disease and non-inflammatory bowel disease patients to propose a diagnostic approach for inflammatory bowel disease trials.

METHODS

We searched on Pubmed, Embase and Cochrane Library for all studies on adult inflammatory bowel disease and non-inflammatory bowel disease patients reporting data on fecal incontinence assessment from January 2009 to December 2019.

RESULTS

In total, 328 studies were included; 306 studies enrolled non-inflammatory bowel disease patients and 22 studies enrolled inflammatory bowel disease patients. In non-inflammatory bowel disease trials the most used tools were the Wexner score, fecal incontinence quality of life questionnaire, Vaizey score and fecal incontinence severity index (in 187, 91, 62 and 33 studies). Anal manometry was adopted in 41.2% and endoanal ultrasonography in 34.0% of the studies. In 142 studies (46.4%) fecal incontinence evaluation was performed with a single instrument, while in 64 (20.9%) and 100 (32.7%) studies two or more instruments were used. In inflammatory bowel disease studies the Wexner score, Vaizey score and inflammatory bowel disease quality of life questionnaire were the most commonly adopted tools (in five (22.7%), five (22.7%) and four (18.2%) studies). Anal manometry and endoanal ultrasonography were performed in 45.4% and 18.2% of the studies.

CONCLUSION

Based on prior validation and experience, we propose to use the Wexner score as the first step for fecal incontinence assessment in inflammatory bowel disease trials. Anal manometry and/or endoanal ultrasonography should be taken into account in the case of positive questionnaires.

Relationships between the results of anorectal investigations and symptom severity in patients with faecal incontinence

PURPOSE

Anorectal dysfunction is the focus of diagnostic investigations for faecal incontinence. However, severity of incontinence and anorectal investigation results can be discordant. The aim of this study was to define the relationships between anorectal investigation results and incontinence severity to determine which measures, if any, were predictive of incontinence severity.

METHODS

Patients presenting for investigation of faecal incontinence completed a symptom questionnaire, anorectal manometry, rectal sensation, pudendal nerve terminal motor latency, and endoanal ultrasound. Bivariate analyses were conducted between the Jorge-Wexner score and investigation results. Subgroup analyses were performed for gender and symptom subtypes (urge, passive, mixed). A multiple regression analysis was performed.

RESULTS

Five hundred and thirty-eight patients were included. There were weak correlations between the Jorge-Wexner score and maximal squeeze pressure [r = - 0.24, 95%CI(- 0.31, - 0.16), p < 0.001], and resting pressure [r = - 0.18, (95%CI(- 0.26, - 0.10), p < 0.001]. In men only, there were significant associations between the Jorge-Wexner score and endoanal sonography [IAS defects: t(113) = - 2.26, p = 0.03, d = 0.58, 95%CI(- 4.38, - 0.29)] and rectal sensation (MTV: r_s = - 0.24, 95%CI(- 0.41, - 0.06), p = 0.01). No substantial differences were observed in the urge/passive/mixed subgroup analyses. Multiple regression analysis included three variables: age (β = 0.02, p = 0.17), maximal resting pressure (β = - 0.01, p = 0.28), and maximal squeeze pressure (β = - 0.01, p < 0.01). The variance in the Jorge-Wexner score accounted for by this model was < 10%, (R² = 0.07, p = < 0.01, adjusted R² = 0.06).

CONCLUSION

Anorectal investigations cannot predict the severity of faecal incontinence. This may be due to limitations of diagnostic modalities, the heterogeneity of anorectal dysfunction in these patients, or contributing factors which are extrinsic to the anorectum.

Methodologic Validation of a Faster Pelvic Floor Test: Two Randomized Studies in Anal Acoustic Reflectometry

BACKGROUND

Anal acoustic reflectometry investigates the opening and closing function of the anal canal using reflected sound waves to measure a cross-sectional area at different pressures. Anal acoustic reflectometry is reliable and repeatable, distinguishes between continence and incontinence and between subgroups of incontinence, correlates with symptom severity, and does not distort the anal canal during investigation.

OBJECTIVE

The purpose of this study was to validate anal acoustic reflectometry methodology by asking 2 questions: can anal acoustic reflectometry be used alongside manometry (order study) and can anal acoustic reflectometry be performed faster (filling study). The secondary aim was to assess the response of the anal canal to stretch using anal acoustic reflectometry.

DESIGN

This research included 2 prospective randomized studies.

SETTINGS

The study was conducted at a tertiary referral center.

PATIENTS

Patients undergoing investigation for fecal incontinence were included.

INTERVENTION

For the order study, patients were prospectively randomized to anal acoustic reflectometry, manometry, 2-minute rest and then manometry, anal acoustic reflectometry, or vice versa. For the filling study, patients were prospectively randomized to fast rate anal acoustic reflectometry (5 cm H2O/1 s), manometry, 2-minute rest and then manometry, normal rate anal acoustic reflectometry (5 cm H2O/3 s), or vice versa.

MAIN OUTCOME MEASURES

The primary outcome was no difference in anal acoustic reflectometry or manometry variables. Demographic and clinical data were recorded.

RESULTS

The order study included 30 patients with a median age of 63 years (range, 30-84 y); 77% were women. No difference was found among all of the variables of anal acoustic reflectometry and manometry regardless of which test was performed first. The filling study included 50 patients with a median age of 62 years (range, 30-78 y); 80% were women. No difference was found between fast and normal rates of anal acoustic reflectometry and manometry in any order.

LIMITATIONS

This study was limited by its comparison with water-perfused manometry.

CONCLUSIONS

Anal acoustic reflectometry and manometry can be performed at the normal or fast rate of anal acoustic reflectometry in any order. A fast rate of anal acoustic reflectometry did not augment the response of the anal canal to stretch as measured by anal acoustic reflectometry and manometry. This study validates a faster anal acoustic reflectometry technique and vindicates previous data. See Video Abstract at http://links.lww.com/DCR/A821.

Electrophysiological Basis of Fecal Incontinence and Its Implications for Treatment

The majority of patients with neuropathic incontinence and other pelvic floor conditions associated with straining at stool have damage to the pudendal nerves distal to the ischial spine. Sacral nerve stimulation appears to be a promising innovation and has been widely adopted and currently considered the standard of care for adults with moderate to severe fecal incontinence and following failed sphincter repair. From a decision-to-treat perspective, the short-term efficacy is good (70%-80%), but the long-term efficacy of sacral nerve stimulation is around 50%. Newer electrophysiological tests and improved anal endosonography would more effectively guide clinical decision making.

Fecal incontinence - Challenges and solutions

Fecal incontinence is not a diagnosis but a frequent and debilitating common final pathway symptom resulting from numerous different causes. Incontinence not only impacts the patient's self-esteem and quality of life but may result in significant secondary morbidity, disability, and cost. Treatment is difficult without any panacea and an individualized approach should be chosen that frequently combines different modalities. Several new technologies have been developed and their specific roles will have to be defined. The scope of this review is outline the evaluation and treatment of patients with fecal incontinence.

Effect of age, patient's sex, and type of trauma on the correlation between size of sphincter defect and anal pressures in posttraumatic fecal incontinence

BACKGROUND

The physiologic assessment of anal sphincters in cases of posttraumatic fecal incontinence is a fundamental step in planning operative treatment. In this study, we evaluate the correlation between size of anal sphincter defect, anal pressures, and clinical symptoms in patients with posttraumatic fecal incontinence. We also investigate the impact of patients' age, sex, and type of trauma on this correlation.

METHODS

Records of 70 patients fitting the study's eligibility criteria were collected retrospectively from the archives of Mansoura University Hospitals' colorectal surgery unit. Demographic data of patients, causes of fecal incontinence, images of sphincter defects on endorectal ultrasonography, anal resting and squeeze pressures, and Wexner continence scores were collected, and correlation analysis was performed.

RESULTS

Seventy patients (54 males and 16 females) with a mean (±standard deviation) age of 36 ± 16 years were studied. Mean maximal resting anal pressure was 42 ± 16 mm Hg, and mean maximal squeeze anal pressure was 80 ± 35 mm Hg. Size of external anal sphincter defect was negatively correlated with mean maximal squeeze (r = -0.4298). Mean Wexner continence score was correlated positively with size of external anal sphincter defect (r = 0.3743). Both correlations became significantly stronger in female patients, patients greater than 50 years, postfistulectomy patients, and patients with obstetric injuries.

CONCLUSION

Size of external anal sphincter defect correlates negatively with mean maximal squeeze and positively with symptoms score. This correlation is stronger in females, patients greater than 50 years, and patients with postfistulectomy or obstetric injuries. These findings suggest that this group of patients requires additional assessment before surgical repair.

Pudendal nerve testing does not contribute to surgical decision making following anorectal testing in patients with faecal incontinence

PURPOSE

Faecal incontinence (FI) is a debilitating condition, which affects approximately 2-17 % of the population. Clinical assessment, physiological testing and imaging are usually used to evaluate the pathophysiology and guide management of FI. By analysing patient characteristics, symptoms and investigative findings, the aim of this study was to identify which patient characteristics and investigations influence patient management.

METHODS

Data was prospectively collected for all patients with FI presenting to a single surgeon at the Royal Prince Alfred Hospital, Sydney, between March 2002 and September 2013. Continuous data was analysed using the independent T-test. Categorical data was analysed using chi-square tests and logistic regression.

RESULTS

Three hundred ninety-eight patients were reviewed; 96 % were female and the mean age was 57 years. Surgical intervention was recommended for 185 patients (47 %) should biofeedback fail. Independent predictors for surgical recommendation were prolapse (p < 0.001, adjusted OR = 4.9 [CI 2.9-8.2]), a functional sphincter length <1 cm (p = 0.032, OR = 1.7 [CI 1.1-2.8]), an external anal sphincter defect (p = 0.028, OR = 1.8 [CI 1.1-3.1]) and a Cleveland Clinic Incontinence Score ≥10 (p = 0.029, OR = 1.7 [CI 1.1-2.6]).

CONCLUSION

Independent predictors of surgical recommendation included the presence of prolapse, a functional sphincter length <1 cm, an external anal sphincter defect and a Cleveland Clinic Incontinence Score ≥ 10. Pudendal neuropathy was not a predictor of surgical intervention, leading us to question the utility of this investigation.

Libertas: a phase II placebo-controlled study of NRL001 in patients with faecal incontinence showed an unexpected and sustained placebo response

PURPOSE

Faecal incontinence (FI) is distressing, significantly reduces quality of life (QoL) and has few pharmacological treatments. The α1-adrenoceptor agonist NRL001 (1R,2S-methoxamine hydrochloride) improves anal sphincter tone. NRL001 efficacy was evaluated by changes in Wexner scores at week 4 vs. baseline in NRL001-treated patients compared with placebo. Impact of NRL001 on QoL and safety were also assessed.

METHODS

Four hundred sixty-six patients received NRL001 (5, 7.5 or 10 mg) or placebo as suppository, once daily over 8 weeks. Wexner score, Vaizey score and QoL were analysed at baseline, week 4 and week 8. FI episodes and adverse events were recorded in diaries.

RESULTS

At week 4, mean reductions in Wexner scores were -3.0, -2.6, -2.6 and -2.4 for NRL001 5, 7.5, 10 mg and placebo, respectively. All reduced further by week 8. As placebo responses also improved, there was no significant treatment effect at week 4 (p = 0.6867) or week 8 (p = 0.5005). FI episode frequency improved for all patients, but not significantly compared with placebo (week 4: p = 0.2619, week 8: p = 0.5278). All patients' QoL improved, but not significantly for all parameters (p > 0.05) except depression/self-perception at week 4 (p = 0.0102) and week 8 (p = 0.0069), compared with placebo. Most adverse events were mild and judged probably or possibly related to NRL001.

CONCLUSIONS

All groups demonstrated improvement in efficacy and QoL compared with baseline. NRL001 was well-tolerated without serious safety concerns. Despite the improvement in all groups, there was no statistically significant treatment effect, underlining the importance of relating results to a placebo arm.

Implantation of autologous muscle-derived stem cells in treatment of fecal incontinence: results of an experimental pilot study

Background

The aim of this study is to present results of the implantation of autologous myoblasts into the external anal sphincter (EAS) in ten patients with fecal incontinence.

Methods

After anatomical and functional assessment of the patients’ EAS, a vastus lateralis muscle open biopsy was performed. Stem cells were extracted from the biopsy specimens and cultured in vitro. Cell suspensions were then administered to the EAS. Patients were scheduled for follow-up visits in 6-week intervals. Total follow-up was 12 months.

Results

All biopsy and cell implantation procedures were performed without complications. Nine of the patients completed a full 12-month follow-up. There was subjective improvement in six patients (66.7 %). In manometric examinations 18 weeks after implantation, squeeze anal pressures and high-pressure zone length increased in all patients, with particularly significant sphincter function recovery in five patients (55.6 %). Electromyographic (EMG) examination showed an increase in signal amplitude in all patients, detecting elevated numbers of propagating action potentials. Twelve months after implantation two patients experienced deterioration of continence, which was also reflected in the deterioration of manometric and EMG parameters. The remaining four patients (44.4 %) still described their continence as better than before implantation and retained satisfactory functional examination parameters.

Conclusions

Implantation of autologous myoblasts gives good short-term results not only in a subjective assessment, but also in objective functional tests. It seems that this promising technology can improve the quality of life of patients with fecal incontinence, but further study is required to achieve better and more persistent results.

Diagnostic testing for fecal incontinence

Many tests are available to assist in the diagnosis and management of fecal incontinence. Imaging studies such as endoanal ultrasonography and defecography provide an anatomic and functional picture of the anal canal which can be useful, especially in the setting of planned sphincter repair. Physiologic tests including anal manometry and anal acoustic reflexometry provide objective data regarding functional values of the anal canal. The value of this information is of some debate; however, as we learn more about these methods, they may prove useful in the future. Finally, nerve studies, such as pudendal motor nerve terminal latency, evaluate the function of the innervation of the anal canal. This has been shown to have significant prognostic value and can help guide clinical decision making. Significant advances have also happened in the field, with the relatively recent advent of magnetic resonance defecography and high-resolution anal manometry, which provide even greater objective anatomic and physiologic information about the anal canal and its function.

An Evidence-Based Approach to the Evaluation, Diagnostic Assessment and Treatment of Fecal Incontinence in Women

Fecal incontinence (FI) is a debilitating disorder which negatively impacts quality of life. The etiology is often multifactorial and although most women with FI are able to be treated, many remain untreated because a significant proportion of women do not report their symptoms and seek care. The evaluation and treatment of FI can be also hindered by a lack of understanding of the mechanisms and current options. This article provides a review on the evidence-based evaluation and management for FI.

Pelvic floor muscle training for bowel dysfunction following colorectal cancer surgery: A systematic review

AIMS

To identify, evaluate and synthesize the evidence examining the effectiveness of pelvic floor muscle training (PFMT) on bowel dysfunction in patients who have undergone colorectal cancer surgery.

METHODS

Eight electronic databases (MEDLINE 1950-2014; CINAHL 1982-2014; EMBASE 1980-2014; Scopus 1823-2014; PsycINFO 1806-2014; Web of Science 1970-2014; Cochrane Library 2014; PEDro 1999-2014) were systematically searched in March 2014. Reference lists of identified articles were cross referenced and hand searched. Randomized controlled trials, cohort studies and case series were included if they investigated the effects of conservative treatments, including PFMT on bowel function in patients with colorectal cancer following surgery. Two reviewers independently assessed the risk of bias of studies using the Newcastle-Ottawa Scale (NOS).

RESULTS

Six prospective non-randomized studies and two retrospective studies were included. The mean (SD) NOS risk of bias score was 4.9 (1.2) out of 9; studies were limited by a lack of non-exposed cohort, lack of independent blinded assessment, heterogeneous treatment protocols, and lack of long-term follow-up. The majority of studies reported significant improvements in stool frequency, incontinence episodes, severity of fecal incontinence, and health-related quality of life (HRQoL) after PFMT. Meta-analysis was not possible due to lack of randomized controlled trials.

CONCLUSIONS

Pelvic floor muscle training for patients following surgery for colorectal cancer appears to be associated with improvements in bowel function and HRQoL. Results from non-randomized studies are promising but randomized controlled trials with sufficient power are needed to confirm the effectiveness of PFMT in this population.

Early functional results of biofeedback and its impact on quality of life of patients with anal incontinence

CONTEXT

Biofeedback has been used successfully in the treatment of fecal incontinence, working mainly on rehabilitation of the sphincter muscle. However, there are few studies presenting objective results of biofeedback, in terms of functional results and those related to the quality of life.

OBJECTIVES

The aims of this study was to evaluate the immediate results of biofeedback in the treatment of fecal incontinence and its impact on the quality of life of patients by using validated questionnaires, correlating the results with those related to functional parameters of quality of life and clinical variables.

METHODS

We analyzed and compared the results of biofeedback in 52 patients with fecal incontinence before the start of the sessions and immediately after the end of them, by applying validated questionnaires assessing the degree of intensity of fecal incontinence (FISI - Fecal Incontinence Severity Index) and evaluation of quality of life related to fecal incontinence (FIQL - Faecal Incontinence Quality of Life Scale) as compared to clinical variables (age, onset of symptoms, etiology of the fecal incontinence, number of sessions of biofeedback and number and types of deliveries).

RESULTS

The evaluation of the results of FISI showed a significant increase in the number of individuals who had low severity scores of symptoms before and after the biofeedback (from 48.1 to 65.4%) with P = 0.004. There was significant improvements in domains of the FIQL, behavior (P = 0.008), depression (P = 0.006) and embarrassment (P = 0.008) after biofeedback. There was no significant correlation between the improvement of functional parameters evaluated by FISI and the improvement of quality of life. Positive correlation was found between the improvements of the domains of FIQL. There was no significant correlation between the results obtained using the FISI and FIQL with clinical variables assessed.

CONCLUSIONS

Biofeedback has proven to be an effective therapy in the treatment of fecal incontinence, improving symptoms and/or quality of life for most patients, regardless of clinical presentation of this functional disorder.

Novel artificial anal sphincter system based on transcutaneous energy transmission system tested in vivo

This paper proposes a novel artificial anal sphincter system (AASS) for severe fecal incontinence. The AASS is composed of an artificial anal sphincter (AAS), an external transcutaneous energy transmission system (TETS), and an external control device. The AAS is composed of a cuff, a micropump, a reservoir, and a remote control device. It is designed to be implanted into the body of the patient. The function of the AAS is to open and close the patient's natural anus. Patients suffering from loss of their natural sphincter lose rectal sensation and are thus unable to perceive imminent fecal incontinence. In order to restore rectal sensation, a pressure sensor in the AAS cuff is designed to detect pressure in the colon. The pressure reflects the present quantity of colon contents, allowing patients to control the AAS to open or close the anus according to the pressure. The TETS is designed to provide electrical energy to the implanted AAS without wire connections. The external control device is designed to receive the pressure information from the AAS and send the patient's command to the implanted device. This paper provides a thorough discussion of the design of the novel AASS and describes the performance of the AASS when tested in vivo on two Beagle dogs who were chosen to be the subjects for receiving the implant. The experimental results verified that the performance of the AASS met the functional requirements it was designed for; however, the trial also revealed some challenges to be further studied.

[Treatment of sphincter insufficiency]

Surgical therapy of anal sphincter insufficiency is only indicated if it leads to symptoms and conservative treatment fails to achieve adequate symptom relief. Various new surgical options have evolved over the last decade but evidence of the efficacy varies substantially. Some have gained broader clinical acceptance based on the efficacy, ease of applicability and low risk profile. The paper aims to outline the currently commonly accepted and frequently applied surgical techniques for the treatment of anal sphincter insufficiency and the results, put these into the context of a treatment algorithm and to present novel techniques which carry potential for the future.

[Anorectal diagnostics for proctological diseases]

The majority of proctological diseases can be defined by a structured evaluation of the symptoms and a physical examination. Magnetic resonance imaging (MRI) and anal endosonography can detect complex anal fistulas with a high accuracy but MRI should be preferred because of its objective visualization. Functional anorectal disorders are multifactorial and show morphological and functional irregularities in different compartments of the pelvic floor which is why MR defecography is now one of the most important methods in diagnostic algorithms. Interpreting the results of anal endosonography, anal manometry and neurophysiological testing is highly demanding because of large interindividual variability. Scores are used for objective measurement of symptom severity and quality of life. In clinical practice, well validated scores evaluated in large patient groups with predetermined circumstances are needed. Bringing together morphological results with scores based on subjective perception is required to optimize diagnostics and therapy evaluation in proctology.

Comparative study of anal acoustic reflectometry and anal manometry in the assessment of faecal incontinence

Background

Anal acoustic reflectometry (AAR) is a reproducible technique providing a novel physiological assessment of anal sphincter function. It may have advantages over conventional anal manometry. The aims of this study were to determine the ability of AAR and anal manometry to identify changes in anal sphincter function in patients with faecal incontinence (FI) and to relate these changes to the severity of FI.

Methods

Women with FI underwent assessment with AAR and anal manometry. All patients completed the Vaizey FI questionnaire and were classified according to symptom type (urge, passive or mixed) and integrity of the anal sphincters. The ability of AAR and anal manometry to correlate with symptom severity was evaluated. AAR was compared with anal manometry in detecting differences in anal sphincter function between symptomatic subgroups, and patients with and without a sphincter defect.

Results

One hundred women with FI were included in the study. The AAR variables opening pressure, opening elastance, closing elastance and squeeze opening pressure correlated with symptom severity, whereas the manometric measurements maximum resting pressure and maximum squeeze pressure did not. Unlike anal manometry, AAR was able to detect differences in anal sphincter function between different symptomatic subgroups, whereas anal manometry was not. An anal sphincter defect was not associated with a significant change in anal sphincter function determined by either AAR or anal manometry.

Conclusion

In the assessment of women with FI, AAR variables correlated with symptom severity and could distinguish between different symptomatic subgroups. AAR may help to guide management in these patients.

Low-anterior-resection syndrome. How does neoadjuvant radiotherapy and low resection of the rectum influence the function of anal sphincters in patients with rectal cancer? Preliminary results of a functional assessment study

The aim of the study was to assess the influence of neoadjuvant radiotherapy and resection of the rectum on the functional parameters of anal sphincters.

MATERIAL AND METHODS

20 patients with rectal cancer, qualified for low anterior rectal resection with neoadjuvant radiotherapy were enrolled in the study group. The study protocol included an anorectal manometry, electromyography and fecal incontinence questionnaire (FISI) before radiotherapy, after radiotherapy, and after the operation.

RESULTS

Of the 20 patients 12 were included in the final analysis, because 8 patients were re-qualified to abdomino-perineal resection of the rectum after neoadjuvant treatment. There were no significant changes in anal pressures assessed 5 to 8 days after radiotherapy. In 3 cases (25%) pathological changes in RAIR reflex were found in the manometric examination. After low anterior resection mean basal anal pressures were significantly lower, whereas squeeze anal pressures did not change significantly. In 7 patients (58%) the RAIR reflex was pathological or even absent after low anterior resection. Changes in manometric parameters correlated with FISI incontinence assessment after the operation. In electromyographic examination action potentials of motoric units of the external anal sphincter were still present both after radiotherapy, and after operation.

CONCLUSIONS

Fecal incontinence after low anterior resection of the rectum seems to be caused mostly by changes in autonomic functionality of anal sphincters and lack of compliance of the neorectum, since the influence of neoadjuvant radiotherapy and the operation itself on the somatic innervation of anal sphincters seems to be minimal.

Fecal incontinence: etiology, evaluation, and treatment

Fecal incontinence is a debilitating problem facing ~2.2% of the U.S. general population over 65 years of age. Etiologic factors include traumatic, neurologic, congenital, and iatrogenic. Most commonly, obstetric trauma causes fecal incontinence as well as poorly performed anorectal surgery or pelvic radiation. Several severity scores and quality of life indexes have been developed to quantify incontinent symptoms. There are several nonsurgical and surgical options for the treatment of fecal incontinence. Biofeedback is among the most successful nonoperative strategies. Depending on the cause, anal sphincter repair, artificial bowel sphincter, and sacral nerve stimulation are used to treat fecal incontinence with some success. Unfortunately, fecal incontinence is an extremely difficult problem to manage: there has not been one, single treatment option that has proven to be both safe and effective in long-term studies.

Stapled transanal rectal resection and sacral nerve stimulation - impact on faecal incontinence and quality of life

AIM

The aim of the study was to assess the impact of stapled transanal rectal resection (STARR) on pre-existing faecal incontinence and quality of life in patients suffering from obstructive defaecation syndrome (ODS) and to evaluate the efficiency of sequential sacral nerve stimulation (SNS) for improvement of persistent incontinence after STARR.

METHOD

Thirty-one patients with ODS and major faecal incontinence prior to STARR were prospectively enrolled. The outcome was measured using the Cleveland Clinic Constipation and Incontinence score (CCS, CCIS), Faecal Incontinence Qualities-of-Life Index (FIQL), Patient Assessment of Constipation Quality-of-Life (PAC-QOL) and EuroQol visual analogue scale (EQ-VAS).

RESULTS

The overall levels of constipation (CCS from 13.1 ± 3.8 to 6.2 ± 5.4; P < 0.001) and incontinence (CCIS from 12.6 ± 3.2 to 9.4 ± 5.1; P = 0.005) were significantly improved after STARR; concordantly, the global and specific quality of life were significantly improved. Following postoperative constipation and incontinence, three different groups of patients were differentially referred to SNS. In group I (n = 16, 52%), both constipation (CCS from 12.6 ± 4.0 to 3.6 ± 1.9; P < 0.001) and incontinence (CCSI from 12.43 ± 3.2 to 5.1 ± 1.9; P < 0.001) were improved. In group II (n = 8, 25%), only constipation was improved (CCS from 12.3 ± 2.3 to 3.3 ± 2.2; P < 0.001), while incontinence persisted (CCIS from 12.8 ± 2.9 to 13.1 ± 3.1; P > 0.05). In group III (n = 7, 23%) there was no improvement at all. Sacral nerve stimulation was successfully carried out in six (85%) of seven patients in group II (post-SNS CCSI 6.1 ± 1.7; P = 0.01) but failed in five of five patients in group III.

CONCLUSION

Stapled transanal rectal resection improves quality of life in ODS patients with both severe constipation and faecal incontinence. Sacral nerve stimulation may efficiently improve persisting incontinence after STARR in selected patients.

Anorectal function evaluation and predictive factors for faecal incontinence in 600 patients

AIM

Anorectal function was assessed in patients with and without faecal incontinence (FI) . Risk factors predictive for FI were determined.

METHOD

Between 2003 and 2009, all consecutive patients referred were assessed by questionnaire, anorectal manometry and anal endosonography. Predictive factors were identified and used to develop a statistical model to predict FI.

RESULTS

Of 600 patients (519 women), 285 (48%) were faecally incontinent. In comparison with continent women, incontinent women (mean Vaizey score 15.4), were older, had more liquid stools, more deliveries, more urinary incontinence, lower anal pressures, shorter sphincter length, smaller rectal capacity and more sphincter defects. Incontinent men (mean Vaizey score 15.3) were older and had lower anal pressures. Incontinent and continent patients showed an overlap in test results. Predictors in women were age, stool consistency, anal pressures, rectal capacity, and internal and external sphincter defects. The area under the ROC-curve was 0.84 (P < 0.001; 95% confidence interval, 0.80-0.87). Using a cut off point of 0.4, FI was predicted with sensitivity, specificity, positive and negative predictive values of 86%, 68%, 74% and 82%, respectively. The model was studied in five women with a temporary stoma and was accurate in predicting FI after stoma closure.

CONCLUSION

Incontinent patients have lower pressures, smaller rectal capacity and more sphincter defects than controls, but show a large overlap. Our model shows a relatively high sensitivity and negative predictive value for predicting FI in women. The model seems promising in the patients studied with a temporary stoma.

Total mesorectal excision with intraoperative assessment of internal anal sphincter innervation provides new insights into neurogenic incontinence

BACKGROUND

The aim of this prospective study was to assess internal anal sphincter (IAS) innervation in patients undergoing total mesorectal excision (TME) by intraoperative neuromonitoring (IONM).

STUDY DESIGN

Fourteen patients underwent TME. IONM was carried out through pelvic splanchnic nerve stimulation under continuous electromyography of the IAS. Anorectal function was assessed with the digital rectal examination scoring system and a standardized questionnaire.

RESULTS

Nine of 11 patients who underwent low anterior resection had positive IONM results, with stimulation-induced increased IAS electromyographic amplitudes (median 0.23 μV (interquartile range [IQR] 0.05, 0.56) vs median 0.89 μV (IQR 0.64, 1.88), p < 0.001) after TME. The patients with the positive IONM results were continent after stoma closure. Of 2 patients with negative IONM results, 1 had fecal incontinence after closure of the defunctioning stoma and received a permanent sigmoidostomy. In the other patient the defunctioning stoma was deemed permanent due to decreased anal sphincter function. In 3 patients who underwent abdominoperineal excision, IONM assessed denervation of the IAS after performance of the abdominal part.

CONCLUSIONS

This study demonstrated that IONM of IAS innervation in rectal cancer patients is feasible and may predict neurogenic fecal incontinence.

Critical reappraisal of anorectal function tests in patients with faecal incontinence who have failed conservative treatment

OBJECTIVE

Anorectal function tests are often performed in patients with faecal incontinence who have failed conservative treatment. This study was aimed to establish the additive value of performing anorectal function tests in these patients in selecting them for surgery.

PATIENTS AND METHODS

Between 2003 and 2009, all referred patients with faecal incontinence were assessed by a questionnaire, anorectal manometry and anal endosonography. Patients with diarrhea, inflammatory bowel disease, pouches or rectal carcinoma were excluded.

RESULTS

In total, 218 patients were evaluated. Of these, 107 (49%) patients had no sphincter defects, 71 (33%) had small defects and 40 (18%) had large defects. Anorectal manometry could not differentiate between patients with and without sphincter defects. Patients with sphincter defects were only found to have a significantly shorter sphincter length and reduced rectal capacity compared to patients without sphincter defects. Forty-three patients (20%) had a normal anal pressures ≥ 40 mmHg. Seventeen patients (8%) had also a dyssynergic pelvic floor both on clinical examination and anorectal manometry. Fifteen patients (7%) had a reduced rectal capacity between 65 and 100 ml. There was no difference in anal pressures or the presence of sphincter defects in these patients compared to patients with a rectal capacity >150 ml. There was no correlation between anorectal manometry, endosonography and faecal incontinence severity scores.

CONCLUSION

In patients with faecal incontinence who have failed conservative treatment, only anal endosonography can reveal sphincter defects. Anorectal manometry should be reserved for patients eligible for surgery to exclude those with suspected dyssynergic floor or reduced rectal capacity.

Anal sphincter repair for fecal incontinence: effect on symptom severity, quality of life, and anal sphincter squeeze pressures

INTRODUCTION AND HYPOTHESIS

The objective of this study was to determine the effect of external anal sphincter repair on fecal incontinence symptoms, quality of life, and anal sphincter squeeze pressures.

METHODS

The fecal incontinence symptoms and impact on quality of life, patient satisfaction, and anorectal manometry were assessed pre- and post-operatively.

RESULTS

One hundred four women were eligible and 74/104 (71%) returned post-operative questionnaires. Fifty-four of 74 (73%) had pre- and post-operative questionnaires. Twenty-five of 74 (34%) had pre- and post-operative anorectal manometry measures. Mean length of follow-up for participants (n = 54) was 32 ± 19 months. Modified Manchester Health Questionnaire scores decreased from 47.3 ± 21.9 to 28.4 ± 24.3 (p < 0.01) and Fecal Incontinence Severity Index scores from 30.6 ± 13.0 to 21.6 ± 15.5 (p < 0.01). Seventy-seven percent of the participants was satisfied. Sphincter squeeze pressures increased from 53.4 ± 25.0 to 71.8 ± 29.1 mmHg (p < 0.01).

CONCLUSIONS

External anal sphincter repair resulted in sustained improvements in fecal incontinence severity and quality of life along with improved anal sphincter squeeze pressures.

Validation of the Wexner scale in women with fecal incontinence in a Turkish population

INTRODUCTION AND HYPOTHESIS

The main aim of this study was to validate the Turkish translated version of the Wexner scale.

METHODS

After establishing the test-retest reliability and internal consistency of the Turkish version of Wexner scale on 31 patients, total and subscale scores and anal manometric measurements of 60 participants were performed. Correlation between Wexner scale scores and manometric measurement values were analyzed and those values of patients with or without anal incontinence symptoms were compared.

RESULTS

Of the 60 participants, 47 (78%) showed no signs or symptoms of anal incontinence. Wexner scale showed a high internal consistency (Cronbach's alpha = 0.816). Total and each subscale score of Wexner scale showed strong correlation with resting and maximal squeeze pressures and between each other (p < 0.005). The pressure values were significantly less in asymptomatic patients compared to patients with any degree of symptoms (p < 0.05).

CONCLUSION

The Turkish translated version of the Wexner scale is a reliable, consistent, and valid instrument to evaluate anal functions in women with anal incontinence for Turkish speaking women. Total and subscale scores of the Wexner scale and anal manometric measurements showed significant correlation.

Quality of life and functional results of submucosal injection therapy using dextranomer hyaluronic acid for fecal incontinence

BACKGROUND AND AIM

The aim of this prospective study was to analyze safety and functional outcome of transanal submucosal injection of dextranomer hyaluronic acid ("bulking agents therapy") in patients with passive fecal incontinence.

METHODS

All patients who underwent transanal injection therapy were prospectively enrolled in this study. Inclusion criteria included fecal incontinence (internal anal sphincter dysfunction) after failed conservative treatment. The procedure was performed in a standardized technique, including submucosal injection of 4 × 1 mL dextranomer hyaluronic acid 5 mm above the dentate line. The primary endpoint focused on symptom improvement provided as the change in incontinence status and quality of life using validated scores (Wexner incontinence score, symptom-specific Fecal Incontinence Quality of Life [FIQoL] scale, and generic EQ-5D-Visual Analogue Scale [EQ-5D-VAS]).

RESULTS

Within the observation period (July 2007 to May 2009), a total of 21 patients (17 women) with passive fecal incontinence were treated. Neither morbidity nor adverse events were documented. Three months postoperatively, 61.1% (11/18) showed significant improvement of symptoms (reduction of incontinence episodes and soiling), which was sustained after 20 months in 55.6% (10/18). Wexner incontinence score decreased from 16.8 to 12.3 (P > .05). Significant improvement was documented for FIQoL and EQ-5D-VAS (P < .05).

CONCLUSION

The current results indicate that injection therapy using hyaluronic acid is an innovative and minimally invasive procedure with no morbidity. Although Wexner incontinence score is not significantly influenced, a significant improvement in quality of life was observed in more than 50% of patients.