Gastric emptying function after ileal J pouch-anal anastomosis for ulcerative colitis

BACKGROUND: Little is known of the effects on gastric function after ileal J pouch-anal anastomosis (IPAA) for ulcerative colitis. This study aimed to determine whether patients with postoperative high stool frequency after IPAA exhibit impaired gastric function. METHODS: Gastric emptying time (GET) for a solid diet (rice gruel) with the use of a radioisotope method and for a liquid diet (orange juice) with the use of an acetaminophen method were assessed in 36 patients with ulcerative colitis more than 30 months after closure of protective ileostomy. Patients were divided into 2 groups: 18 patients with stool frequency less than 6 per day (group A) and 18 patients with stool frequency more than 7 per day (group B). GET for solid and liquid diets in groups A and B were compared with those in 18 healthy volunteers (group C). We correlated the time of peak blood concentration of acetaminophen (TPBCA) and both individual stool frequency per day and the length of distal ileum removed. RESULTS: GET for the solid diet in groups A and B was not altered by IPAA compared with group C. GET for the liquid diet in groups A and B was slower than in group C (P<.0001). GETs for the liquid diet at 60 minutes or more in group A were slower than in group B (P<.0001); TPBCA was longer in group A than in groups B or C (P<.01). There were inverse correlations between TPBCA and individual stool frequency per day and between TPBCA and length of distal ileum removed (P<.001). CONCLUSIONS: Rapid transit from the stomach of the liquid diet in group B compared with group A may influence high stool frequency after IPAA. Our results suggested that, to obtain an adequate stool frequency after IPAA, the length of distal ileum removal should be less than 15 cm.     

Results at up to 20 years after ileal pouch-anal anastomosis for chronic ulcerative colitis

BACKGROUND: Ileal pouch-anal anastomosis (IPAA) is performed routinely for chronic ulcerative colitis. METHODS: Using data from a prospective database and annual standardized questionnaires, functional outcome, complications and quality of life (QoL) after IPAA were assessed. RESULTS: Some 1885 IPAA operations were performed for chronic ulcerative colitis over a 20-year period (mean follow-up 11 years). The mean age at the time of IPAA was 34.1 years, increasing from 31.2 years (1981-1985) to 36.3 years (1996-2000). The overall rate of pouch success at 5, 10, 15 and 20 years was 96.3, 93.3, 92.4 and 92.1 per cent respectively. Mean daytime stool frequency increased from 5.7 at 1 year to 6.4 at 20 years (P < 0.001), and also increased at night (from 1.5 to 2.0; P < 0.001). The incidence of frequent daytime faecal incontinence increased from 5 to 11 per cent during the day (P < 0.001) and from 12 to 21 per cent at night (P < 0.001). QoL remained unchanged and 92 per cent remained in the same employment. Seventy-six patients were eventually diagnosed with indeterminate colitis and 47 with Crohn's disease. CONCLUSION: IPAA is a reliable surgical procedure for patients requiring proctocolectomy for chronic ulcerative colitis and indeterminate colitis. The clinical and functional outcomes are excellent and stable for 20 years after operation.     

再造回肠储粪袋对全结肠切除术后排便的影响

为观察人工再造回肠储粪袋对结肠慢传输型便秘全结肠切除术后排便的影响,将48例结肠慢传输型便秘患者随机分为试验组和对照组,试验组24例采用全结肠切除后回肠末端造J型储粪袋后与直肠吻合治疗,对照组24例不造人工储粪袋。观察两组患者术后的排便情况。结果显示,试验组较对照组大便不成形例数、水样便例数、排便次数明显减少（P〈0．05）。结果表明,人工储粪袋对结肠慢传输型便秘患者全结肠切除术后排便影响很大,可以明显减少长期腹泻情况,提高患者的生活质量。     

Gastrointestinal transit after proctocolectomy with ileal pouch-anal anastomosis or ileostomy

Proctocolectomy with ileal pouch-anal anastomosis increases the frequency of stooling, perhaps due in part to the loss of an ileocecal or colonic braking effect on gastrointestinal transit. To assess whether colectomy with ileal pouch-anal anastomosis (IPAA) or with ileostomy accelerates gastrointestinal transit, we studied 16 IPAA patients (mean +/- SEM stool frequency, 8 +/- 1 stools/day), 5 patients after colectomy and Brooke ileostomy, and 8 healthy, unoperated controls (1 +/- 1 stools/day). Gastric emptying of liquids and small bowel transit of chyme were measured concurrently with a dual isotope technique. Gastric emptying was similar among all groups. In contrast, postprandial small bowel transit of the head of a duodenal marker was slowed, not accelerated, in IPAA patients (178 +/- 26 min) compared to Brooke subjects (80 +/- 32 min, P less than 0.05) and controls (75 +/- 15 min, P less than 0.01). Maximal filling of both the ileal pouch (341 +/- 19 min) and the ileostomy bag (348 +/- 12 min) occurred later than filling of the colon in controls (243 +/- 32 min, P less than 0.01). Overall stool frequency did not correlate with small bowel transit in the ileoanal patients, but the two ileoanal subjects with greatest stool frequency (11 and 18 stools/day) had the earliest arrival of marker at the pouch. In conclusion, removal of the colon markedly slowed small bowel transit in most patients, although it did not alter gastric emptying of liquids. Creation of an ileal pouch and ileoanal anastomosis further slowed transit of the head of the meal.(ABSTRACT TRUNCATED AT 250 WORDS)     

Female fertility and childbirth after ileal pouch-anal anastomosis for ulcerative colitis

BACKGROUND: The aim of this study was to calculate the probability of becoming pregnant after ileal pouch-anal anastomosis (IPAA) for ulcerative colitis, and to evaluate complications during pregnancy and childbirth. METHODS: A questionnaire was posted to 160 women with an IPAA and to 160 controls. The probability of becoming pregnant after IPAA was calculated by the Kaplan-Meier method. RESULTS: Of 54 women who had undergone IPAA surgery, 36 (67 per cent) succeeded in becoming pregnant naturally, compared with 49 (82 per cent) of 60 controls. The probability of pregnancy after 2 years of trying was 56 per cent in the IPAA group and 91 per cent in the control group (P < 0.001). Women in the IPAA group needed infertility investigations more often (24 versus 10 per cent; P = 0.044). In all, 39 (72 per cent) women in the IPAA group and 53 (88 per cent) in the control group bore a child. Twenty-one of 39 women in the IPAA group and 13 of 53 in the control group had a caesarean section (P = 0.005). Anal incontinence after delivery occurred more often in the control group. CONCLUSION: Women with an IPAA mostly suffer a reduction in the probability of conception rather than complete infertility. Because complications during pregnancy and delivery were rare, caesarean section should be based mainly on obstetric indications.     

家族性腺瘤性息肉病两种术式的对比研究

目的探讨家族性腺瘤性息肉病采用回肠贮袋肛管吻合术与回肠直肠吻合术两种术式的手术效果。方法回顾性分析两组在手术结果、术后排便功能和生活质量的差异。结果30例患者中行回肠直肠吻合术12例,贮袋吻合术18例,术后无死亡,无吻合口瘘等严重并发症,均无膀胱和性功能障碍。平均住院时间、手术时间和失血量直接吻合组优于贮袋组(P<0 01),在并发症发生率、术后排气排便时间和肠蠕动次数两组相似(P>0 05)。随访时间最短6个月,最长16年。3例(25% )直接吻合者术后直肠息肉癌变需切除直肠。两种术式的术后排便功能相似,仅在白天排便次数和肛周刺激方面IRA组优于IPAA组(P<0 05)。结论两组患者术后排便功能和术后生活质量相似,但回肠贮袋肛管吻合术可减少术后残留的直肠黏膜癌变机会,因而是较理想的手术方式。     

A comparison of hand-sewn versus stapled ileal pouch anal anastomosis (IPAA) following proctocolectomy: a meta-analysis of 4183 patients

OBJECTIVE: Using meta-analytical techniques, the study compared postoperative adverse events and functional outcomes of stapled versus hand-sewn ileal pouch-anal anastomosis (IPAA) following restorative proctocolectomy. BACKGROUND: The choice of mucosectomy and hand-sewn versus stapled pouch-anal anastomosis has been a subject of debate with no clear consensus as to which method provides better functional results and long-term outcomes. METHODS: Comparative studies published between 1988 and 2003, of hand-sewn versus stapled IPAA were included. Endpoints were classified into postoperative complications and functional and physiologic outcomes measured at least 3 months following closure of ileostomy or surgery if no proximal diversion was used, quality of life following surgery, and neoplastic transformation within the anal transition zone. RESULTS: Twenty-one studies, consisting of 4183 patients (2699 hand-sewn and 1484 stapled IPAA) were included. There was no significant difference in the incidence of postoperative complications between the 2 groups. The incidence of nocturnal seepage and pad usage favored the stapled IPAA (odds ratio [OR] = 2.78, P < 0.001 and OR = 4.12, P = 0.007, respectively). The frequency of defecation was not significantly different between the 2 groups (P = 0.562), nor was the use of antidiarrheal medication (OR = 1.27, P = 0.422). Anorectal physiologic measurements demonstrated a significant reduction in the resting and squeeze pressure in the hand-sewn IPAA group by 13.4 and 14.4 mm Hg, respectively (P < 0.018). The stapled IPAA group showed a higher incidence of dysplasia in the anal transition zone that did not reach statistical significance (OR = 0.42, P = 0.080). CONCLUSIONS: Both techniques had similar early postoperative outcomes; however, stapled IPAA offered improved nocturnal continence, which was reflected in higher anorectal physiologic measurements. A risk of increased incidence of dysplasia in the ATZ may exist in the stapled group that cannot be quantified by this study. We describe a decision algorithm for the choice of IPAA, based on the relative risk of long-term neoplastic transformation.     

Octreotide for the treatment of diarrhoea in patients with ileal pouch anal anastomosis: a placebo-controlled crossover study

Aim Diarrhoea with urgency is a debilitating long‐term complication of ileal pouch anal anastomosis (IPAA) after a proctocolectomy. Somatostatin analogues are used to control diarrhoea and high‐output ostomies. Hence, we designed a prospective, double‐blind, crossover trial to explore the efficacy and tolerability of octreotide to reduce diarrhoea in adult patients with IPAA. Method Patients were randomized to octreotide subcutaneously (SC), 500 μg three times daily (t.i.d.), or matching placebo SC for 7 days. Responders (a reduction in stool frequency of three or more stools per 24‐h period and with a reduction in stool frequency of at least 30% after 7 days of treatment compared with baseline; the primary end‐point) remained in the same group and nonresponders could cross over to the alternative treatment for 7 days. Open‐label octeotide LAR 30 mg was offered to all responders on day 14. Flexible pouchoscopy with biopsies was performed at baseline in all patients and was repeated on days 7 and 14 in patients with pouchitis. Results Fifteen patients (11 men, median age 52 years), all with ulcerative colitis, were randomized. Three patients were withdrawn for side effects during the blinded phase. Response was achieved by two of 12 and two of 11 patients treated with octreotide or placebo, respectively (including crossover, P = 0.9). The median stool frequency remained stable in both groups [Δoctreotide: 0 (IQR, ?4 to 0), Δplacebo: ?1 (IQR, ?1 to 1), P = 0.45]. Octreotide had no effect on the modified pouch disease activity index (mPDAI), and pouchitis persisted in five of six subjects with pouchitis at onset. One subject received open‐label octreotide LAR. Conclusion Octreotide has no clear beneficial effect on the stool pattern or on pouchitis severity in patients with high stool frequency after IPAA.     

Changes in Intestinal Transit Time after Proctocolectomy Assessed by the Lactulose Breath Test

After proctocolectomy with ileal pouch-anal anastomosis (IPAA) patients have increased stool frequency and intermittently use antidiarrheal medication. In addition to other factors, gastrointestinal transit time (MTT) could influence stool frequency. The aim of this study was to investigate how MTT changes after IPAA and to study whether MTT has an influence on daily stool frequency. In a prospective trial MTT was investigated with the lactulose breath test in 12 patients undergoing surgery for chronic ulcerative colitis (CUC) or familial adenomatous polyposis coli (FAPC) at different stages: before proctocolectomy, after IPAA with loop ileostomy, and 3 months and 1 year after ileostomy closure. MTT was also measured in 12 patients with IPAA, 12 patients with subtotal colectomy and ileorectal anastomosis (IRA), and 8 patients with conventional proctocolectomy and Brooke ileostomy (CPC) several years after surgery. Twelve healthy volunteers served as controls. Before IPAA, MTT was prolonged in CUC versus FAPC and controls. After restoration of gut continuity MTT was markedly accelerated. After 1 year MTT was slowed again, though values before proctocolectomy and those in controls were not reached. Several years after surgery MTT was significantly prolonged in IPAA and IRA versus controls. In CPC, MTT could not be determined by lactulose breath test. Stool frequency showed an inverse correlation to MTT in IPAA. In conclusion, this study shows that orocecal and oropouch transit are accelerated in the early postoperative period after (procto)colectomy but prolonged in the long-term course. Adaptation of the small bowel takes longer than 1 year. Impairment of stool frequency may be partly due to this adaptation.     

Home transcutaneous electrical stimulation to treat children with slow-transit constipation

PurposeThis study aimed to test the effectiveness of home transcutaneous electrical stimulation (TES) when patients with slow-transit constipation (STC) were trained by a naive clinician.MethodsA surgeon was trained to teach the TES method to STC children who then self-administered at home (1 hour a day, 3-6 months) using a battery-powered interferential stimulator. Bowel diaries, PedsQL4.0 questionnaires, and radio-nuclear colonic transit studies were completed before and after treatment.ResultsThirty-two children (16 female; mean age, 8.3 years; range, 3-17 years) self-administered 3 to 6 months of TES. Three did not return diaries. Group 1 (n = 13) started with less than 3 bowel actions per week, and group 2 (n = 16), with more than 3 bowel actions per week. Defecation frequency increased in 69% of group 1 (mean, 1.4-3.0 per week; P = .02). Soiling frequency decreased in 50% of group 2 (5.4-1.9 per week, P = .04). Of 13 patients, 7 improved with development of urge-initiated defecation. Abdominal pain decreased in 48% (1.6 episodes per week to 0.9 per week, P = .06). Stool consistency improved in 56%. There was significant improvement in child-reported and parent-reported PedsQL Scores. Colonic transit improved in 13 of 25 patients.ConclusionHome TES provides a new treatment for STC children, with 50% of treatment-resistant patients benefited. Success requires clinician training and close patient contact. Transcutaneous electrical stimulation increased defecation and reduced soiling.     

Influence of dietary calcium supplements on ileoanal pouch function and cytokinetics.

A double-blind cross-over study was undertaken in 16 patients after panproctocolectomy and ileoanal pouch reconstruction to compare supplementary calcium (1.5 g/day) with placebo over 2 months with a 2-week washout period. Stool frequency was recorded and the effects on pouch mucosal crypt cellular proliferation were determined using an in vitro stathmokinetic technique which measures the crypt cell production rate (CCPR) and an immunohistochemical method using the Ki67 monoclonal antibody for proliferating nuclei. The median (interquartile range) diurnal stool frequency was reduced by calcium (4 (3-5) per day) compared with values obtained before treatment (7 (5-10) per day, P less than 0.002) and with placebo (7 (6-9) per day, P = 0.002). Similarly, calcium reduced nocturnal stool frequency (1 (0-1) per night) compared with pretreatment and placebo (both 2 (1-3) per night, P less than 0.05) values. Calcium reduced the mean(s.e.m.) CCPR to 1.88(0.41) cells per crypt per hour compared with pretreatment (3.63(0.53), P = 0.01) and placebo (3.24(0.43), P = 0.002) values. Median (interquartile range) Ki67 activity was also reduced by calcium (13.2 (9.7-16.7) per cent), compared with values obtained before treatment (27.3 (14.3-30.2) per cent, P = 0.001) and with placebo (26.0 (17.2-32.0) per cent, P = 0.001). Stool frequency was significantly correlated with the CCPR (diurnal: r = 0.37; nocturnal: r = 0.31, both P less than 0.05). Nine patients used antidiarrhoeal medication while receiving placebo compared with four patients receiving calcium (P = 0.032). This study has shown that supplementary oral calcium significantly reduced stool frequency in patients with pouches, a reduction that was associated with reduced cell proliferation. The mechanisms for this effect are not known.     

长方案中小剂量曲普瑞林对体外受精胚胎移植者垂体降调节的效果观察

目的 :观察小剂量曲普瑞林黄体后期给药对体外受精 胚胎移植者垂体降调节的效果。　方法 :1 2 0例病人随机分成两组。A组于月经第 2 1d起每日皮下注射曲普瑞林 0 .1mg ,共 7d ;B组采用贝苏林喷鼻长方案。比较两组超排卵周期第 3d(D3)和绒毛膜促性腺激素 (hCG)注射日血清性激素水平及高纯度促卵泡素 (HP)用药剂量等指标。　结果 :A组D3和hCG注射日平均血清黄体生成素 (LH)水平分别为 (1 .55± 0 .99)U/L和 (2 .70± 1 .45)U/L ,血清雌二醇 (E2 )水平分别为 (85 .66± 48.1 9)pmol/L和 (5 451 .31± 1 90 0 .61 )pmol/L ,显著低于B组 (P <0 .0 0 1 ;P <0 .0 1 ;P <0 .0 5 ;P <0 .0 0 1 ) ;而A组平均每周期用HP(2 8.2 0± 1 1 .0 3)支 ,显著高于B组用量 [(2 2 .30± 6 .39)支 ,P<0 .0 0 1 ) ]。　结论 :使用小剂量曲普瑞林对垂体降调节作用比常规贝苏林喷鼻方案效果好     

Short ileal segment for orthotopic neobladder: A feasibility study

Objectives: The objective of this study was to present the construction of a neobladder with a modified pouch technique using 25–35 cm of terminal ileum. Methods: Thirty‐eight patients whose pouch was constructed from 25–35 cm of terminal ileum (short pouch [SP] group) were prospectively evaluated vs 41 patients whose pouch was constructed from 50–70 cm of terminal ileum (long pouch group). Pouch volume, post‐void residual (PVR) volume, need for catheterization, continence and voiding frequency were evaluated at 3 and 12 months after surgery. Results: SP group patients had significantly smaller pouch capacity (440 vs 840 mL, P < 0.001) at month 12, and smaller PVR at postoperative months 3 (11 [0–43]vs 40 [0–147] mL, P < 0.001) and 12 (10 [0–90]vs 72 [0–570] mL, P < 0.001). SP group patients had significantly higher voiding frequency on postoperative month 3 (10 vs 9, P < 0.001) and 12 (7 vs 6, P < 0.005). Continence was significantly improved in the SP group compared with the long pouch group after 12 months (63.2% vs 34.1%, respectively, P = 0.034). Full continence improved significantly over time (P < 0.001) in the SP group, from 26.3% at month 3 to 63.2% at month 12. Conclusion: A pouch constructed from 25–35 cm of terminal ileum provides adequate capacity, smaller PVR, satisfactory continence and a better 24‐h voiding frequency pattern during the first postoperative year.     

Does botulinum type-A toxin affect motor activity after proctocolectomy and ileal pouch-anal anastomosis? An experimental study in dogs

AIM OF THE STUDY: The use of anticholinergic drugs has provided a useful therapeutic approach to reduce stool frequency in patients with proctocolectomy and ileal pouch-anal anastomosis (IPAA). Botulinum type-A (BTA) toxin has been shown to specifically block acetylcholine release in the intestinal wall. Therefore this study investigated the effect of BTA on small intestinal and J-pouch motility after IPAA. MATERIAL AND METHODS: Proctocolectomy and IPAA were performed in 4 dogs. The motility of the small intestine and the ileal pouch was recorded by serosal electrodes and strain gauge transducers. The intestinal transit time was determined radiologically and pouch compliance was determined manometrically. Multiple measurements were performed before and after endoscopic injection of BTA into the pouch wall. RESULTS: This treatment did not significantly influence stool frequency, intestinal transit time or pouch compliance. Intrinsic pouch motility was characterized by irregular contractions, the amplitudes and frequencies of which remained unchanged after BTA administration. With the exception of lower contraction amplitudes directly proximal to the pouch, there were no significant differences in the characteristics of the migrating myoelectric complex or in the fed pattern of the small intestine and ileal pouch. CONCLUSIONS: BTA does not significantly affect ileal pouch motility. The beneficial effects of anticholinergic drugs therefore seem to be due to their multifactorial mode of action and not to the inhibition of cholinergic neurons in the pouch.     

The effect of ageing on function and quality of life in ileal pouch patients: a single cohort experience of 409 patients with chronic ulcerative colitis

OBJECTIVE: To evaluate in what manner ageing affects functional outcome and quality of life (QoL) in patients with chronic ulcerative colitis (CUC) after ileal pouch-anal anastomosis (IPAA). SUMMARY BACKGROUND DATA: Short-term function and QoL after IPAA is good. However, patients are usually young, and little is known about the influence of time and ageing on long-term outcomes after IPAA. METHODS: Using a standardized questionnaire, functional outcome, QoL, and complications were assessed prospectively in a cohort of 409 patients followed annually for 15 years after IPAA. RESULTS: Follow-up was complete in the single cohort of 409 patients and functional and QoL outcomes summarized at 5, 10, and 15 years. Daytime stool frequency changed little (mean 6), while nighttime frequency increased from 1 stool to 2 stools. Incontinence for gas and stool increased from 1% to 10% during the day and from 2% to 24% at night over 15 years. The cumulative probability of pouchitis increased from 28% at 5 years to 38% at 10 years and to 47% at 15 years. Bowel obstruction and stricture were other principal long-term complications. At 15 years, 91% of patients had kept the same job. Work was not affected by the surgery in 83%, while social activities, sports, traveling, and sexual life all improved after surgery and did not deteriorate over time. CONCLUSIONS: These long-term results in a single cohort of 409 IPAA patients are unique and are likely a more accurate reflection of long-term outcome than has been previously reported. These data support the conclusion that IPAA is a durable operation for patients requiring proctocolectomy for CUC; functional and QoL outcomes are good, predictable, and stable for 15 years after operation.     

Anorectal physiology in relation to clinical subgroups of patients with severe constipation

OBJECTIVE: The aim of this study was to evaluate anorectal physiology in relation to clinically defined subgroups of patients with idiopathic constipation and to analyse relationships between anorectal physiology and rectal evacuation. SUBJECTS AND METHODS: One hundred consecutive patients with idiopathic constipation were clinically categorized as slow transit (n=19), outlet obstruction (n=52) and a group with mixed symptoms (n=29). They were examined by recording anal pressures and also rectal volumes in response to stepwise increases in rectal pressure (5-60 cm H2O). The manovolumetric results were compared with 28 sex and aged matched controls. Rectal evacuation was measured by computer-based image analysis of rectal emptying rate in defaecography. RESULTS: The rectal pressure thresholds for filling, urge and pain did not differ between the groups but there were proportionally more patients in the slow transit and mixed group with thresholds for filling exceeding 25 cm H2O (P=0.04). In total, 18% of patients had impaired sensitivity which was associated with long duration of symptoms (P < 0.05). Patients with grossly impaired rectal sensitivity (filling threshold > 40 cm H2O) had impaired rectal evacuation (P < 0.05). The rectal compliance was increased in the slow transit and mixed group (P < 0.01-0.05) in the pressure interval 5-15 cm H2O. Anal resting and squeeze pressures did not differ between the groups although 7/19 in the slow transit group had values around the lower limit of controls. Slow wave frequency was lower in all patient groups (P < 0.001 vs. controls). Rectal evacuation was not related to sphincter function or to rectal compliance. CONCLUSIONS: Clinical categorization of constipated patients defines groups where altered anorectal physiology is not uncommon. Constipation with symptoms of infrequent defaecation may be associated with impaired rectal sensitivity and increased rectal compliance whereas outlet obstruction symptoms are not clearly related to changes in anorectal physiology.     

结肠成形袋与结肠J型袋改善直肠癌术后排便功能的比较

目的比较结肠成形袋和结肠J型袋对改善直肠癌术后排便功能的作用。方法将73例中下段直肠癌随机分成两组，第1组（CPP组）36例，行结肠成形袋手术。第2组（CJP组）37例，行结肠J型袋手术。分别于术后6、12个月对患者排便功能进行评价。结果CPP组均成功实施了结肠成形袋手术，但CJP组有4例（10％）因盆腔狭窄、肥胖未能成功实施结肠J形袋手术。术后6个月时两组每日平均排便次数为4．3和4．5，便后1h内需再次排便为23％和20％，大便失禁评分为3和4。两组差异无统计学意义（t=0．384，x^2=0，101，t=0．643，P〉0．05）。术后12个月对每日平均便次、便后1h内需再次排便、大便失禁等情况进行综合评分。CPP组和CJP组分别为：2．4次、2．2次；5％、6％及2、3分。两组差异无统计学意义（t=0．419，x^2=0．506，t=0．582，P〉0．05）。结论结肠成形袋和结肠J型袋对改善直肠癌术后排便功能的作用相似。结肠成形袋方法简单、临床效果肯定，是一种很有前途的结肠贮袋手术.     

Decreased levels of mucosal detoxification enzymes in the pouch of patients with familial adenomatous polyposis

BACKGROUND: Adenomas can develop in the pouch after colectomy with ileal pouch-anal anastomosis (IPAA) in patients with familial adenomatous polyposis (FAP). Glutathione S-transferases (GSTs) have a protective role in carcinogenesis. GST activity is much higher in the ileum than in the colon. The present study examined the hypothesis that the protective capacity of GSTs may be lowered as a result of colonic metaplasia of the ileal pouch. METHODS: Levels of GSTs, glutathione and cysteine, and the degree of inflammation and colonic metaplasia were quantified in biopsies from the pouch and afferent loop of 26 patients with FAP. RESULTS: GST enzyme activity, and levels of GST alpha, glutathione and cysteine in the pouch were significantly lower than those in the afferent loop (308 versus 398 nmol per min per mg protein (P<0.001), 4604 versus 5286 ng per mg protein (P=0.010), 27.1 versus 34.8 nmol per mg protein (P=0.023) and 0 versus 4.8 nmol per mg protein (P=0.009) respectively). No correlation was found between inflammation or colonic metaplasia of the pouch and GST enzyme activity in the pouch. CONCLUSION: After IPAA, GST detoxification activity in the pouch is significantly lower than that in the afferent ileal loop, which may promote tumorigenesis.     

Ileoanal pouch function is related to postprandial pouch tone.

BACKGROUND: Functional impairments are frequently observed in patients with an ileoanal pouch. Meal ingestion increases pouch tone and motility. Little is known, however, about the influence of meal-stimulated pouch characteristics on pouch function. The aim was to characterize basal and postprandial pouch motor and sensory characteristics in relation to clinical pouch function in patients with an ileoanal pouch. METHODS: Nineteen patients with an ileoanal pouch, without faecal incontinence but with either a high stool frequency (n = 8) or an adequate stool frequency (n = 11), underwent pressure distension of the pouch, by which pouch compliance and sensitivity characteristics were assessed using an electronic barostat. A set pressure procedure was performed to assess the influence of a meal on pouch tone and motility. RESULTS: Mean(s.d.) compliance was 10(6) and 11(4) ml/mmHg in the groups with poor and adequate pouch function respectively (P not significant). Mean(s.d.) visual analogue scale scores (0-10 cm) for urge at the highest pressure of 28 mmHg were 2.3(1.0) versus 2.3(2.4) cm respectively (P not significant); those for pain were 0.8(1.0) versus 0.5(0.7) (P not significant). Postprandially mean(s.d.) pouch volume decreased by 70(24) per cent in the group with poor pouch function and 29(25) per cent in the group with adequate pouch function (P < 0.01). The frequency and amplitude of phasic pouch contractions increased significantly postprandially, but no differences in motility characteristics were observed between the two groups. CONCLUSION: In patients with uniform pouch design and follow-up after pouch construction, pouch compliance and sensitivity were no different between patients with normal and high stool frequency; however, postprandial pouch tone was increased significantly in patients with a high stool frequency.