Quantitative proteomics analysis reveals the pathogenesis of obstructed defecation syndrome caused by abnormal expression of dystrophin

BACKGROUND Obstructed defecation syndrome(ODS)represents the most prevalent form of chronic constipation,affecting a diverse patient population,leading to numerous complications,and imposing a significant burden on healthcare resources.Most ODS patients have insufficient rectal propulsion,but the exact mechanism underlying the pathogenesis of ODS remains unclear.AIM To explore the molecular mechanism underlying the pathogenesis of ODS.METHODS A total of 30 pairs of rectal samples were collected from patients with ODS(ODS group)or grade IV prolapsed hemorrhoids without constipation(control group)for quantitative proteomic and bioinformatic analysis.Subsequently,50 pairs of paraffin-embedded rectal specimens were selected for immunohistochemistry and immunofluorescence studies to validate the analysis results.Human intestinal smooth cell contractile function experiments and electrophysiological experiments were conducted to verify the physiological functions of target proteins.Cellular ultrastructure was detected using transmission electron microscopy.RESULTS In comparison to the control group,the expression level of dystrophin(DMD)in rectal specimens from ODS patients was markedly reduced.This finding was corroborated using immunohistochemistry and immunofluorescence techniques.The diminished expression of DMD compromised the contractile function of intestinal smooth muscle cells.At the molecular level,nucleoporin protein 153 and L-type voltage-gated calcium channel were found to be overexpressed in intestinal smooth muscle cells exhibiting downregulated DMD expression.Electrophysiological experiments confirmed an excessive influx of calcium ions into these cells.Moreover,vacuolar-like structures which may be associated with excessive calcium influx were observed in the cells by transmission electron microscopy.CONCLUSION Decreased DMD expression in intestinal smooth muscle may upregulate L-type voltage-gated calcium channel expression,leading to excessive calcium influx which may cause a decrease in rectal propulsion,thereby contributing to the pathogenesis of ODS.

Surface Water Quality Profiling Using Physicochemical Parameters in Open Defecation Free and Non-Open Defecation Free Local Government Areas in Benue State, Nigeria

Physicochemical parameters of surface water sources in the study of local government areas (LGAs) were assessed using standard procedures. The mean physicochemical parameters for pH (5.49), NO2 (0.23 mg/L), SO4 (0.77 mg/L), Na (28.72 mg/L), Ca (28.94 mg/L), Mg (17.50 mg/L), Cl (11.65 mg/L), TSS (6.27 mg/L), TDS (104.23 mg/L), BOD (2.83 mg/L) and F (0.87 mg/L) were below WHO standards irrespective of their defecation status. The values for electrical conductivity (EC) (2770.50 µs/cm, turbidity (481.24 NTU), dissolved oxygen (DO) (5.32 mg/L), chemical oxygen demand (COD) (445.50 mg/L), K (125.06 mg/L), PO4 (0.78 mg/L) and Fe (0.57 mg/L) were above the WHO limits for safe water. Higher EC and COD values obtained in the study is evidence of pollution of the water sources by organic matter.

Biofeedback therapy for dyssynergic defecation

Dyssynergic defecation is one of the most common forms of functional constipation both in children and adults; it is defined by incomplete evacuation of fecal material from the rectum due to paradoxical contraction or failure to relax pelvic floor muscles when straining to defecate. This is believed to be a behavioral disorder because there.are no associated morphological or neurological abnormalities, and consequently biofeedback training has been recommended for treatment. Biofeedback involves the use of pressure measurements or averaged electromyographic activity within the anal canal to teach patients how to relax pelvic floor muscles when straining to defecate. This is often combined with teaching the patient more appropriate techniques for straining （increasing intra-abdominal pressure） and having the patient practice defecating a water filled balloon. Tn adults, randomized controlled trials show that this form of biofeedback is more effective than laxatives, general muscle relaxation exercises （described as sham biofeedback）, and drugs to relax skeletal muscles. Moreover, its effectiveness is specific to patients who have dyssynergic defecation and not slow transit constipation. However, in children, no clear superiority for biofeedback compared to laxatives has been demonstrated. Based on three randomized controlled studies in the last two years, biofeedback appears to be the preferred treatment for dyssynergic defecation in adults.

Consensus statement AIGO/SICCR:Diagnosis and treatment of chronic constipation and obstructed defecation(partⅠ:Diagnosis)

Chronic constipation is a common and extremely troublesome disorder that significantly reduces the quality of life,and this fact is consistent with the high rate at which health care is sought for this condition.The aim of this project was to develop a consensus for the diagnosis and treatment of chronic constipation and obstructed defecation.The commission presents its results in a "Question-Answer" format,including a set of graded recommendations based on a systematic review of the literature and evidence-based medicine.This section represents the consensus for the diagnosis.The history includes information relating to the onset and duration of symptoms and may reveal secondary causes of constipation.The presence of alarm symptoms and risk factors requires investigation.The physical examination should assess the presence of lesions in the anal and perianal region.The evidence does not support the routine use of blood testing and colonoscopy or barium enema for constipation.Various scoring systems are available to quantify the severity of constipation;the Constipation Severity Instrument for constipation and the obstructed defecation syndrome score for obstructed defecation are the most reliable.The Constipation-Related Quality of Life is an excellent tool for evaluating the patient's quality of life.No single test provides a pathophysiological basis for constipation.Colonic transit and anorectal manometry define the pathophysiologic subtypes.Balloon expulsion is a simple screening test for defecatory disorders,but it does not define the mechanisms.Defecography detects structural abnormalities and assesses functional parameters.Magnetic resonance imaging and/or pelvic floor sonography can further complement defecography by providing information on the movement of the pelvic floor and the organs that it supports.All these investigations are indicated to differentiate between slow transit constipation and obstructed defecation because the treatments differ between these conditions.

Management of obstructed defecation

The management of obstructed defecation syndrome(ODS) is mainly conservative and mainly consists of fiber diet, bulking laxatives, rectal irrigation or hydrocolontherapy, biofeedback, transanal electrostimulation, yoga and psychotherapy. According to our experience, nearly 20% of the patients need surgical treatment. If we consider ODS an "iceberg syndrome", with "emerging rocks", rectocele and rectal internal mucosal prolapse, that may benefit from surgery, at least two out of ten patients also has "underwater rocks" or occult disorders, such as anismus, rectal hyposensation and anxiety/depression, which mostly require conservative treatment. Rectal prolapse excision or obliterative suture, rectoceleand/or enterocele repair, retrograde Malone's enema and partial myotomy of the puborectalis muscle are effective in selected cases. Laparoscopic ventral sacral colporectopexy may be an effective surgical option. Stapled transanal rectal resection may lead to severe complications. The Transtar procedure seems to be safer, when dealing with recto-rectal intussusception. A multidisciplinary approach to ODS provides the best results.

Stapled transanal rectal resection for obstructed defecation syndrome associated with rectocele and rectal intussusception

AIM:To evaluate the safety and efficacy of stapled transanal rectal resection(STARR),and to analyze the outcome of the patients 12-mo after the operation.METHODS:From May 2007 to October 2008,50 female patients with rectocele and/or rectal intussusception underwent STARR.The preoperative status,perioperative and postoperative complications at baseline,3,6 and 12-mo were assessed.Data were collected prospectively from standardized questionnaires for the assessment of constipation[constipation scoring system,Longo’s obstructed defecation syndrome(ODS)score system,symptom severity score],patient satisfaction (visual analogue scale),and quality of life(Patient Assessment of Constipation-Quality of Life Questionnaire).RESULTS:At a 12-mo follow-up,significant improvement in the constipation scoring system,ODS score system,symptom severity score,visual analog scale and quality of life(P<0.0001)was observed.The symptoms of constipation improved in 90%of patients at 12 mo after surgery.The self-reported definitive outcome was excellent in 15(30%)patients,fairly good in 8(16%),good in 22(44%),and poor in 5(10%).CONCLUSION:STARR can be performed safely without major morbidity.Moreover,the procedure seems to be effective for patients with obstructed defecation associated with symptomatic rectocele and rectal intussusception.

Treatment strategies in obstructed defecation and fecal incontinence

Obstructed defecation （OD） and fecal incontinence （FI） are challenging clinical problems, which are commonly encountered in the practice of colorectal surgeons and gastroenterologists. These disorders sodally and psychologically distress patients and greatly impair their quality of life. The underlying anatomical and pathophysiological changes are complex, often incompletely understood and cannot always be determined. As a consequence, many medical, surgical, and behavioral approaches have been described, with no panacea. Over the past decade, advances in an understanding of these disorders together with rational and similar methods of evaluation in anorectal physiology laboratories （ARP）, radiology studies, and new surgical techniques have led to promising results. In this brief review, we discuss treatment strategies and recent updates on clinical and therapeutic aspects of obstructed defecation and fecal incontinence.

Transanal surgery for obstructed defecation syndrome: Literature review and a single-center experience

Obstructed defecation syndrome(ODS) is a functional disorder commonly encountered by colorectal surgeons and gastroenterologists, and greatly affects the quality of life of patients from both societal and psychological aspects. The underlying anatomical and pathophysiological changes of ODS are complex. However, intra-rectal intussusception and rectocele are frequently found in patients with ODS and both are thought to play an important role in the pathogenesis of ODS. With the development of evaluation methods in anorectal physiology laboratories and radiology studies, a great variety of new operative procedures, especially transanal procedures, have been invented to treat ODS. However, no procedure has been proved to be superior to others at present. Each operation has its own merits and defects. Thus, choosing appropriate transanal surgical procedures for the treatment of ODS remains a challenge for all surgeons. This review provides an introduction of the current problems and options for treatment of ODS and a detailed summary of the essential assessments needed for patient evaluation before carrying out transanal surgery. Besides, an overview of the benefits and problems of current transanal surgical procedures for treatment of ODS is summarized in this review. A report of clinical experience of some transanal surgical techniques used in the authors' center is also presented.

Biofeedback-guided pelvic floor exercise therapy for obstructive defecation: An effective alternative

AIM: To compare biofeedback-guided pelvic floor exercise therapy (BFT) with the use of oral polyethylene glycol (PEG) for the treatment of obstructive defecation.

Surgery for obstructed defecation syndrome-is there an ideal technique

Obstructive defecation syndrome(ODS) is a common disorder with a considerable impact on the quality of life of affected patients.Surgery for ODS remains a challenging topic.There exists a great variety of operative techniques to treat patients with ODS.According to the surgeon's preference the approach can be transanal,transvaginal,transperineal or transabdominal.All techniques have its advantages and disadvantages.Notably,high evidence based studies are significantly lacking in literature,thus making accurate assessments difficult.Careful patient's selection is crucial to achieveoptimal functional results.It is mandatory to assess not only defecation disorders but also evaluate overall pelvic floor symptoms,such as fecal incontinence and urinary disorders for choosing an appropriate and tailored strategy.Radiological investigation is essential but may not explain complaints of every patient.

Modulatory effects of Bifidobacterium longum BB536 on defecation in elderly patients receiving enteral feeding

AIM:To investigate the effects of the probiotic Bifidobacterium longum BB536 on the health management of elderly patients receiving enteral feeding.METHODS:Two double-blind,placebo-controlled trials were performed with long-term inpatients receiving enteral tube feeding at Kitakyushu Hospital Group,Fukuoka,Japan.BB536 was administered as BB536-L and BB536-H powders that contained approximately 2.5 × 10 10 and 5 × 10 10 cfu of BB536,respectively.In the first trial,83 patients(age range:67-101 years) were randomized into 2 groups that received placebo(placebo group) or BB536-H(BB536 group) powders.In the second trial,123 patients(age range:65-102years) were randomized into 3 groups,and each group received placebo(placebo group),BB536-L(BB536-L group),or BB536-H(BB536-H group) powders.Each patient received the study medication for 16 wk after 1 wk of pre-observation.Fecal samples were collected from each patient prior to and after the intervention during Trial 2.Clinical observations included body temperature,occurrence of infection,frequency of defecation,and fecal microbiota.RESULTS:No significant changes were observed in the frequency of defecation for either treatment in Trial 1.However,a significant change was noted in the BB536-L group(P = 0.0439) in Trial 2 but not in the placebo or BB536-H groups.Subgroup analyses based on the frequency of defecation for each patient during the pre-observation period for both trials revealed significant increases in bowel movements in patients with a low frequency of defecation and significant decreases in the bowel movements of patients with a high frequency of defecation during the intervention period in the BB536 groups.The combination of Trials 1 and 2 data revealed a modulatory effect of BB536 ingestion on the changes in bowel movements.Significantly increased bowel movements were observed in patients in the low frequency subgroup with significant intergroup differences(P < 0.01).Significantly decreased bowel movements were observed in patients in the high subgroup,but no significant intergroup differences were observed compared with the placebo group.BB536 ingestion increased the prevalence of normally formed stools.BB536 intake also significantly(P < 0.01) increased the cell numbers of bifidobacteria in fecal microbiota,and significant intergroup differences were observed at week 16.No adverse events were reported in any group.CONCLUSION:Our results suggest that BB536 ingestion modulated the intestinal environment and may have improved the health care of elderly patients receiving enteral feeding.

Defecation function and quality of life in patients with slow-transit constipation after colectomy

BACKGROUND Although total or subtotal colectomy for slow-transit constipation(STC)has been proven to be a definite treatment,the associated defecation function and quality of life(QOL)are rarely studied.AIM To evaluate the effectiveness of surgery for STC regarding defecation function and QOL.METHODS From March 2013 to September 2017,30 patients undergoing surgery for STC in our department were analyzed.Preoperative,intra-operative,and postoperative 3-mo,6-mo,1-year,and 2-year follow-up details were recorded.Defecation function was assessed by bowel movements,abdominal pain,bloating,straining,laxative,enema use,diarrhea,and the Wexner constipation and incontinence scales.QOL was evaluated using the gastrointestinal QOL index and the 36-item short form survey.RESULTS The majority of patients(93.1%,27/29)stated that they benefited from the operation at the 2-year follow-up.At each time point of the follow-up,the number of bowel movements per week significantly increased compared with that of the preoperative conditions(P<0.05).Similarly,compared with the preoperative values,a marked decline was observed in bloating,straining,laxative,and enema use at each time point of the follow-up(P<0.05).Postoperative diarrhea could be controlled effectively and notably improved at the 2-year follow-up.The Wexner incontinence scores at 6-mo,1-year,and 2-year were notably lower than those at the 3-mo follow-up(P<0.05).Compared with those of the preoperative findings,the Wexner constipation scores significantly decreased following surgery(P<0.05).Thus,it was reasonable to find that the gastrointestinal QOL index scores clearly increase(P<0.05)and that the 36-item short form survey results displayed considerable improvements in six spheres(role physical,role emotional,physical pain,vitality,mental health,and general health)following surgery.CONCLUSION Total or subtotal colectomy for STC is not only effective in alleviating constipation-related symptoms but also in enhancing patients’QOL.

Comparative outcome of stapled trans-anal rectal resection and macrogol in the treatment of defecation disorders

AIM:To prospectively assess the eff icacy and safety of stapled trans-anal rectal resection(STARR) compared to standard conservative treatment,and whether preoperative symptoms and findings at defecography and anorectal manometry can predict the outcome of STARR.METHODS:Thirty patients(Female,28;age:51 ± 9 years) with rectocele or rectal intussusception,a defecation disorder,and functional constipation were submitted for STARR.Thirty comparable patients(Female,30;age 53 ± 13 years),who presented with symptoms of rectocele or rectal intussusception and were treated with macrogol,were assessed.Patients were interviewed with a standardized questionnaire at study enrollment and 38 ± 18 mo after the STARR procedure or during macrogol treatment.A responder was def ined as an absence of the Rome Ⅲ diagnostic criteria for functional constipation.Defecography and rectoanal manometry were performed before and after the STARR procedure in 16 and 12 patients,respectively.RESULTS:After STARR,53% of patients were responders;during conservative treatment,75% were responders.After STARR,30% of the patients reported the use of laxatives,17% had intermittent anal pain,13% had anal leakage,13% required digital facilitation,6% experienced defecatory urgency,6% experienced fecal incontinence,and 6% required re-intervention.During macrogol therapy,23% of the patients complained of abdominal bloating and 13% of borborygmi,and 3% required digital facilitation.No preoperative symptom,defecographic,or manometric finding predicted the outcome of STARR.Post-operative defecography showed a statistically significant reduction(P < 0.05) of the rectal diameter and rectocele.The postoperative anorectal manometry showed that anal pressure and rectal sensitivity were not significantly modified,and that rectal compliance was reduced(P = 0.01).CONCLUSION:STARR is not better and is less safe than macrogol in the treatment of defecation disorders.It could be considered as an alternative therapy in patients unresponsive to macrogol.

Predictive factors for compliance with transanal irrigation for the treatment of defecation disorders

AIM To investigate compliance with transanal irrigation(TAI) one year after a training session and to identify predictive factors for compliance.METHODS The compliance of one hundred eight patients [87 women and 21 men; median age 55 years(range 18-83)] suffering from constipation or fecal incontinence(FI) was retrospectively assessed. The patients were trained in TAI over a four-year period at a single institution. They were classified as adopters if they continued using TAI for at least one year after beginning the treatment or as non-adopters if they stopped. Predictive factors of compliance with TAI were based on pretreatment assessments and trainingprogress. The outcomes of the entire cohort of patients who had been recruited for the TAI treatment were expressed in terms of intention-to-treat.RESULTS Forty-six of the 108(43%) trained patients continued to use TAI one year after their training session. The patients with FI had the best results, with 54.5% remaining compliant with TAI. Only one-third of the patients who complained of slow transit constipation or obstructed defecation syndrome continued TAI. There was an overall discontinuation rate of 57%. The most common reason for discontinuing TAI was the lack of efficacy(41%). However, 36% of the patients who discontinued TAI gave reasons independent of the efficacy of the treatment such as technical problems(catheter expulsion, rectal balloon bursting, instilled water leakage or retention, pain during irrigation, anal bleeding, anal fissure) while 23% said that there were too many constraints. Of the patients who reported discontinuing TAI, the only predictive factor was the progress of the training(OR = 4.9, 1.3-18.9, P = 0.02).CONCLUSION The progress of the training session was the only factor that predicted patient compliance with TAI.

Sacral anterior root stimulated defecation in spinal cord injuries: An experimental study in canine model

AIM: To investigate whether there was a dominant sacral root for the motive function of rectum and anal sphincter, and to provide an experimental basis for sacral root electrically stimulated defecation in spinal cord injuries. METHODS: Eleven spinal cord injured mongrel dogs were included in the study. After L4-L7 laminectomy, the bilateral L7-S3 roots were electrostimulated separately and rectal and sphincter pressure were recorded synchronously. Four animals were implanted electrodes on bilateral S2 roots. RESULTS: For rectal motorial innervation, S2 was the most dominant (mean 15.2 kPa, 37.7% of total pressure), S1(11.3 kPa, 27.6%) and S3 (10.9 kPa, 26.7%) contributed to a smaller part. For external anal sphincter, S3 (mean 17.2 kPa, 33.7%) was the most dominant, S2 (16.2 kPa, 31.6%) and S1(14.3 kPa, 27.9%) contributed to a lesser but still a significant part. Above 85% L7 roots provided some functional contribution to rectum and anal sphincter. For both rectum and sphincter, the right sacral roots provided more contribution than the left roots. Postoperatively, the 4 dogs had electrically stimulated defecation and micturition under the control of the neuroprosthetic device. CONCLUSION: S2 root is the most dominant contributor to rectal pressure in dogs. Stimulation of bilateral S2 with implanted electrodes contributes to good micturition and defecation in dogs.

Abdominal ventral rectopexy with colectomy for obstructed defecation syndrome:An alternative option for selected patients

BACKGROUND Abdominal ventral rectopexy(AVR)with colectomy is controversial in the treatment of obstructed defecation syndrome(ODS).Literature data on this technique for ODS are very limited.AIM To evaluate the safety and efficacy of AVR with colectomy for selected patients with ODS.METHODS Consecutive patients who underwent AVR with colectomy for ODS were identified prospectively from 2016 to 2017 in our department.Patient demographics,perioperative surgical results,and postoperative follow-up outcomes were collected and analyzed.Long-term follow-up was evaluated with standardized questionnaires.The severity of symptoms was assessed by the objective Wexner Constipation Score(WCS)and ODS Score.The quality of life was assessed by the Patients Assessment of Constipation Quality of Life score.Functional outcome was compared pre-and post-operatively for each patient.The primary outcomes were determined by the improvement in symptoms and quality of life.Secondary outcome measures were operating time,postoperative length of stay,morbidity and mortality,improvement of pelvic floor structure,and patient satisfaction.RESULTS Four patients underwent robotic-assisted surgery,and two patients underwent a laparoscopic-assisted procedure.The mean operating time for the robotic approach was 243 min(range 160–300 min),and the mean operating time for the laparoscopic approach was 230 min(range 220-240 min).The mean postoperative length of stay was 8.2 d(range 6-12 d).There was no conversion to open procedure and no postoperative mortality.No urinary retention,wound infection,prolonged ileus,pelvic infection and anastomosis leakage occurred.Six patients were followed up for 36 mo.The WCS,ODS,and Patients Assessment of Constipation Quality of Life score improved significantly postoperatively(P<0.05).The WCS and ODS scores showed the best remission and stabilization at 6 to 12 mo after surgery.There was no recurrence or novel constipation after surgery.None of the patients used laxative medication.CONCLUSION Robotic and laparoscopic-assisted ventral rectopexy with colectomy is a safe and effective procedure for selected patients with ODS.However,comprehensive preoperative evaluation and careful patient selection are essential.

Stapled Trans-Anal Rectal Resection (STARR) for Obstructive Defecation Syndrome—Functional Outcome and Quality of Life after Two Years

Background: Stapled transanal rectal resection (STARR) has been shown to improve patients’ functional and quality of life outcomes in several studies. Although it is a safe and effective treatment for obstructive defecation syndrome, still data on long-term follow-up are missing. Methods: From January 2010 to July 2014, 46 consecutive patients undergoing STARR using the CONTOUR&reg TRANSTAR&#8482 device, shortly named TRANSTAR (transanal stapler assisted resection), were prospectively followed. Recurrence rate, quality of life (Patient Assessment of Constipation-Quality of Life (PAC-Qol)) and complication were documented at baseline, 12 and 24 months after operation. Two subgroups of patients were compared to assess the impact of resection length on outcome. Results: We included 46 patients (89% female) in the study. The mean age was 65 ± 16 years and the duration of the operation was 48 ± 4 min. Total PAC-QoL score improved from 2.0 (SD 0.3) to 0.9 (1.4) after 12 months, but deteriorated to 1.2 (0.3) after 24 months (p < 0.001 for both comparisons). Complications were noted in 7% of the patients: Urinary retention (2 patients), postoperative bleeding (1 patient). No major complications or mortality were seen. After one year, we had one prolapse recurrence and after 24 month we had another. There was no significant relation between the length of the specimen and the improvement of life quality. Conclusions: The STARR procedure seems to be a safe and fast therapeutic option for patients with ODS and/or rectal prolapse. It is a tailored transanal full-thickness rectal resection improving the patients’ quality of life still two years after the operation.

The Role of Acupuncture Treatment in Obstructed Defecation Syndrome

Background:Obstructed defecation syndrome(ODS)is a group of symptoms that are mainly caused by pelvic floor dysfunction concerning bowel symptoms.It is challenging in clinical practice.Acupuncture has advantages in the treatment of complex symptoms because of its multi-target and bi-directional regulation of the human body.Since 2500 years ago,acupuncture has been applied empirically to the treatment of constipation.Does acupuncture have any effect on ODS?Objectives:By showing the clinical thoughts,methods,and achievements of acupuncture series in ODS in recent ten years by the author’s team,and two scientific papers published in English on acupuncture treatment of chronic intractable constipation and stress urinary incontinence,it is proved that the core scheme of acupuncture treatment of defecation disorder syndrome(ODS)is flexible.In order to raise awareness of the therapeutic effect of acupuncture in ODS,it can be integrated into existing practice to get opportunities for multidisciplinary cooperation and further research and development.Materials and Methods:By summarizing the diagnosis and treatment of ODS,the first-line selection of pelvic floor rehabilitation and the minimally invasive sacral neuromodulation were reviewed,and it was pointed out that there was a gap between the high demand of patients and the expectation of cost-effectiveness.Then,on the basis of modern eastern and western medical achievements,the holistic concept was introduced into the treatment of pelvic floor dysfunction,and an acupuncture scheme suitable for ODS was proposed.Results:Acupuncture is based on the idea of improving the patients’central nervous system,autonomic nervous system and intestinal nervous system,and is effective in treating ODS.The acupoints were set two groups when patient in supine position,which includes ST 25(Tianshu),SP 15(Daheng),SP 14(Fujie),CV 6(Qihai),CV 4(Guanyuan),ST 36(Zusanli),ST 37(Shangjuxu);When patient is in prone position,it includes BL 20(Pishu),BL 23(Shenshu),BL 25(Dachangshu),BL 33(Zhongliao),BL 34(Xialiao),and GV 20(Baihui).The key was the technique of deep needling of the ST 25(Tianshu)and deep needling of the BL 33(Zhongliao)&BL 34(Xialiao).It needs 2-15 Hz sparse-dense wave electrical stimulation,30 minutes each time,a total of 20 times,which was a scheme that could achieve satisfactory short-term and long-term effects.Conclusion:At present,clinical and basic experimental studies have proved that acupuncture plays a role in treating ODS in a multi-target way.This is a very promising research direction of pelvic floor integrated medicine.In the future,further study on optimizing the protocol and meeting the patient’s gap individually and cost-effectively.

Giant vesical diverticulum:A rare cause of defecation disturbance

Vesical diverticula frequently result from bladder outlet obstructions. However, giant vesical diverticula which cause acute abdomen or intestinal obstruction are very rare. Our review of the English medical literature found 3 cases of bladder diverticula which caused gastrointestinal symptoms. Here, we present a 57-yearold man with a giant diverticulum of the urinary bladder who complained of abdominal pain, nausea and vomiting, constipation, no passage of gas or feces, and abdominal distension for 3 d. A 20 cm x 15 cm diverticulum was observed upon laparotomy. The colonic obstruction was secondary to external compression of the rectum against the sacrum by a distended vesical diverticulum. We performed a diverticulectomy and primary closure. Twelve months postoperatively, the patient had no difficulty with voiding or defecation.

Effect of the Artificial Somato-Autonomic Neuroanastomosis on Defecation after Spinal Cord Injury and Its Underlying Mechanisms

A new artificial somatic-autonomic neuroanastomosis has been established in male rats with spinal cord injury (SCI). Anorectal manometry and neural retrograde tracing were conducted in this animal model to analyze the mechanisms and the effects on recovery of anorectal function. The left L4 ventral root (L4VR) was intradurally micro-anastomosed to the L6 ventral root (L6VR) to establish the new regenerated neural pathway. Three months later the spinal cord was completely transected at the T9-10 level. Eight weeks later the model rats were randomly divided into two groups. The rats in the group 1 (n=8) were applied for anorectal manometry, and those in the group 2 (n=4) were used for neural retrograde tracing study with fluorogold (FG) and dextran tetramethylrhodamine (TMR). The results of anorectal manometry showed the new reflex pathway could induce rectum to contract and simultaneously electric activity of external anal sphincter (EAS) to become weak or disappearing (indicating synergetic relaxation of EAS). FG and TMR dual labeled neurons with round and elliptical shape were mainly observed in L4 angulus anterior of model rats. The regenerated neural pathways were effective to improve the rectum external sphincter synergetic status and restore the anorectal function.