Comparison of topical glyceryl trinitrate ointment and oral nifedipine in the treatment of chronic anal fissure

This study was designed to compare the effect of topical glyceryl trinitrate (GTN) and oral nifedipine treatments on maximal anal resting pressure (MARP) and subsequently to assess their effectiveness in healing of chronic anal fissure (CAF). Patients were allocated randomly to receive either oral nifedipine retard (10 patients) 20 mg twice daily or instructed to apply glyceryl trinitrate (0.2 percent) ointment (10 patients) into the lower half of the anal canal twice daily. They were reviewed and assessed at the first visit and every fortnight for measurement of MARP, pain scores, blood pressure, pulse rate, healing of the fissure and adverse effects. Treatment were continued until healing had occurred or for up to 8 weeks. MARP values before and after application of the GTN ointment was 113.2 cm H2O and 72.5 cm H2O respectively (P < 0.001). Nifedipine caused a reduction in mean MARP from 105.2 to 74.0 cm H2O (P < 0.001). Linear analogue pain scores were significantly reduced after 2 weeks treatment with GTN and nifedipine (P < 0.001) and continued throughout the treatment period. At the end of the study; 7 of the 10 patients in the GTN group were deemed to be healed (5) or improved (2), compared with 6 of the 10 patients in the nifedipine group (5 healed, 1 improved). Headaches occurred in 3 patients in the GTN group, compared with one patient in the nifedipine group. There was no significant difference between GTN and nifedipine in terms of reduction in MARP and pain score, healing of the fissure and incidence of early recurrence and side effects of treatments. We conclude that GTN ointment and oral nifedipine are equally effective in the treatment of chronic anal fissure.     

Comparative Study of Glyceryl Trinitrate Ointment Versus Surgical Management of Chronic Anal Fissure

Chronic Anal Fissure (CAF) is common perineal condition and well-known painful entity. Standard surgical treatment even though available, may require long hospital stay and sometimes have worrying complications like anal incontinence. So non-surgical treatment, Glyceryl Trinitrate has been shown to be an effective for chronic anal fissure. It decreases anal tone and ultimately heals the anal fissure. The present study is the attempt to know the efficacy of 0.2% Glyceryl Trinitrate ointment in the treatment of chronic anal fissure and to compare the effectiveness of 0.2% Glyceryl Trinitrate ointment (GTN) versus fissurectomy with lateral internal sphincterotomy (LIS) and fissurectomy with posterior internal sphincterotomy (PIS) in the management of chronic anal fissure. This is a prospective comparative study of management of chronic anal fissure done in our hospital during the period of one and half year from October 2005 to March 2007. Thirty patients treated with 0.2% Glyceryl Trinitrate ointment and 30 patients treated with fissurectomy and lateral internal sphincterotomy and 30 patients treated with posterior internal sphincterotomy, for chronic anal fissure were selected for study. A single brand of 0.2% Glyceryl Trinitrate ointment (Nitrogesic) used for trial arm. Dose of administration was 1.5 cm to 2 cm in the anal canal with device provided by manufacturers of the proprietary preparation and applied twice a daily for 12 weeks. Patients were followed up for 12 weeks and thereafter evaluated for relief of symptoms in all three groups. Observations were recorded at 2 weeks; 6 weeks and 12 weeks of follow up period, regarding symptoms like pain and bleeding during defecation, healing of CAF and also for side effects like headache in GTN group and flatus, fecal incontinence in surgical groups. Data collected in proforma and analyzed. Study revealed CAF was more in male 59 patients (66%) than the female 31 patients (34%), the ratio being 1: 0.52. The maximum number of patients was encountered in the age group of 20 to 40 years with mean duration of age 34.14 years. In all three groups symptoms like pain, bleeding, constipation and sphincter spasm were present. Sentinel pile was present in 56% of the patients. Common site of fissure was found to be posterior in 94% of patients. Observations with respect to relief of pain, no bleeding and healing were recorded at 2, 6 and 12 weeks of duration. Lateral sphincterotomy remains effective but should be reserved for the patients who fail to respond to initial chemical sphincterotomy or GTN therapy. GTN is good alternative mode of therapy for patients who refuse surgery and prefer medical line of treatment.     

Changing patterns of treatment for chronic anal fissure.

To assess changing patterns of treatment for chronic anal fissure, a retrospective analysis of treatment for chronic anal fissure within one hospital between January 1990 and December 1996 was undertaken. A total of 221 patients received treatment for a chronic anal fissure in this period, of whom 209 had a surgical procedure. Manual dilatation of the anus was performed in 21 patients (10%) and has not been performed since 1995. Lateral internal sphincterotomy was performed in 183 patients (88%) and continues to be the mainstay of treatment. Five female patients (2%) were identified as having a sphincter defect by anal manometry combined with endoanal ultrasound and were treated by an anal advancement flap. From 1996 onwards, 15 patients (7%) were treated by topical glyceryl trinitrate (GTN) paste as the first line of treatment. Of these patients, nine have experienced healing of their fissure, and three have had relief of pain without healing of the fissure. Three have gone on to have a lateral internal sphincterotomy. Lateral internal sphincterotomy remains the primary form of treatment for chronic anal fissure. GTN cream has increasingly been offered as preliminary treatment over the last 12 months. Perioperative use of endoanal ultrasound allowed identification of patients who may be at high risk of postoperative incontinence from a sphincterotomy. An anal advancement flap has been used as an alternative surgical approach for these patients.     

The role of topical diltiazem in the treatment of chronic anal fissures that have failed glyceryl trinitrate therapy

Objective The treatment of anal fissures has evolved over the last 5 years with the development of topical treatments aimed at reducing sphincter hypertonia. This is thought to improve anal mucosal blood flow and promote healing of the fissure. This study reports the use of topical diltiazem in patients with chronic anal fissures that have failed previous treatment with topical 0.2% glyceryl trinitrate (GTN). Patients and methods Forty‐seven patients with chronic anal fissure who had previously failed at least one course of topical GTN were recruited prospectively from a single centre. Patients were instructed to apply 2 cm (approximately 0.7 g) of 2% diltiazem cream to the anal verge twice daily for eight weeks. Symptoms of pain, bleeding and itching were recorded on a linear analogue score prior to starting the cream and then repeated at 2 weekly intervals. Patients were asked to report side‐effects throughout the study period. Healing of the fissure was assessed after 8 weeks of treatment. Results Forty‐six patients completed treatment; of these, 22 had healed fissures (48%). Ten of the 24 patients with persistent fissures were symptomatically improved and wished no further treatment. Of the 14 patients who remained symptomatic, one was given a repeat course of 0.2% glyceryl trinitrate with subsequent healing of the fissure, 10 were recruited into an ongoing study involving injections of botulinum toxin into the internal anal sphincter and three were referred for surgery. Conclusion This study shows that topical 2% diltiazem is an effective and safe treatment for chronic anal fissure in patients who have failed topical 0.2% GTN. The need for sphincterotomy can be avoided in up to 70% of cases.     

A Comparison of the Effects of Diltiazem and Glyceryl Trinitrate Ointment in the Treatment of Chronic Anal Fissure: A Randomized Clinical Trial

Purpose Anal fissure is a common problem affecting all age groups with an equal incidence in both sexes. Traditional surgical treatments, like manual anal dilatation or a sphincterotomy, effectively heal most fissures within a few weeks but such procedures may result in anal incontinence. In recent years, various medical therapies have been used for the treatment of chronic anal fissure without fear of incontinence. Methods Ninety patients with a symptomatic anal fissure were randomly divided into three groups. Group I was treated with 2% diltiazem ointment, Group II was treated with 0.2% glyceryl trinitrate (GTN) ointment, and Group III was kept as the control group. The improvement in the signs and symptoms, the time taken for healing, and side effects were recorded in each group. The patients were followed up monthly and then every 3 months for any recurrence of fissure. Comparative evaluations of the three groups regarding an improvement in symptoms, progress in healing, appearance of side effects, and recurrence were made using the Tukey HSD test. Results Diltiazem ointment was found to be superior regarding pain relief, fewer side effects, and late recurrence as compared with GTN ointment. Conclusion Diltiazem ointment (2%) and GTN ointment (0.2%) are both effective treatment modalities for chronic anal fissure, with diltiazem giving better patient outcome.     

Treatment of anal fissure with glyceryl trinitrate in patients referred for surgical management

Background : A number of recent studies indicate that anal fissure may be treated by applying glyceryl trinitrate (GTN) ointment. The present study aims to determine the effectiveness and patient acceptability of GTN treatment for patients referred to a consultant surgeon. Methods : A prospective study of 65 consecutive patients referred to one surgeon (ALP) over a 12‐month period was undertaken. All patients were offered 0.2% GTN ointment to be applied intra‐anally four times daily for 4 weeks. Informed consent was obtained and review planned for 4 weeks. Results : Fourteen patients declined treatment and nine of the 14 (64%) subsequently underwent lateral sphincterotomy. Twelve of the 51 patients (18.5%) who accepted treatment could not complete it due to headache or persisting severe anal pain. Thirty‐nine of the 51 patients (77%) were able to complete 4 weeks of treatment. Twenty‐two of the 39 reported an improvement in symptoms. A total of 22 patients (43%) who started GTN treatment subsequently underwent lateral sphincterotomy. Conclusions : Evidence from the present study suggests that GTN ointment has a place in the management of referred patients with severe and/or chronic anal fissure, but sphincterotomy remains an important treatment option for the majority.     

A prospective randomized trial of diltiazem and glyceryltrinitrate ointment in the treatment of chronic anal fissure

Objective The aim of this study was to compare prospectively diltiazem with GTN ointment in the treatment of anal fissure. Patients and methods Of 43 outpatients with chronic anal fissure, 22 patients were randomized to topical diltiazem (2%) ointment and 21 patients to glyceryltrinitrate (GTN) (0.5%) ointment twice daily for 8 weeks. During the course of treatment each patient was seen three times. Side‐effects and healing were recorded. Results Healing occurred in 19 of 22 patients treated with diltiazem and 18 of 21 patients were cured with GTN (P = 0.95). Those who were treated with nitroglycerin ointment developed headache and dizzness developed after GTN in 33.3% of cases while no patient had any side‐effects after diltiazem. Conclusions Diltiazem and glyceryltrinitrate (GTN) were equally effective in healing anal fissure but the former resulted in fewer side‐effects.     

A Study of Fecal Incontinence in Patients with Chronic Anal Fissure: Prospective,Randomized, Controlled Trial of the Extent of Internal Anal Sphincter Division During Lateral Sphincterotomy

Background Troublesome fecal incontinence following a lateral internal sphincterotomy is often attributed to faulty surgical technique. However, it may be associated with coexisting occult sphincter defects. Whether continence is related to the extent of sphincterotomy remains debatable. The aim of the study is to identify fecal incontinence related to chronic anal fissure before and after lateral internal sphincterotomy and its relationship to the extent of internal anal sphincter division. Methods One hundred eight patients with chronic anal fissure were prospectively studied before and after lateral internal sphincterotomy. A questionnaire was completed for each patient before and after surgery with regard to any degree of fecal incontinence. Fecal incontinence severity index was assessed using the Cleveland Clinic Incontinence Score. The patients with preoperative perfect continence were randomized into two groups (46 patients in each group): Group 1 underwent traditional lateral internal sphincterotomy (up to the dentate line) and Group 2 were underwent a conservative internal anal sphincterotomy (up to the height of the fissure apex or just below it). Results Minor degrees of incontinence were present before surgery in 16 patients (14.8%). Results of the randomized trial revealed that temporary postoperative incontinence was newly developed in 6/92 of patients (6.52 %) who did not have it before surgery. Five of the six (10.86%) were in Group 1 one (2.17%) was in Group 2 (p = 0.039). Persistent incontinence occurred in two in Group 1 (4.35%). All of them were females. All have had a history of one or more vaginal deliveries. Conclusion A mild degree of fecal incontinence may be associated with chronic anal fissure at presentation rather than as a result of internal sphincterotomy. Troublesome fecal incontinence after lateral internal sphincterotomy is uncommon. Sphincterotomy up to the dentate line provided faster pain relief and faster anal fissure healing, but it was associated with a significant postoperative alteration in fecal incontinence than was sphincterotomy up to the fissure apex. Care should be exercised in female patients with a history of previous obstetric trauma, as internal anal sphincter division may further compromise sphincter function.     

Randomized clinical trial comparing oral nifedipine with lateral anal sphincterotomy and tailored sphincterotomy in the treatment of chronic anal fissure

BACKGROUND: The conventional treatment of chronic anal fissure is lateral sphincterotomy (LAS). The alternative options of tailored sphincterotomy (TS) and 'chemical sphincterotomy' using medication such as nifedipine have recently become available. METHODS: A prospective randomized trial was conducted to compare LAS with TS and oral nifedipine. The main endpoints were fissure healing, symptom relief, recurrence and continence. RESULTS: One hundred and thirty-two patients were treated and followed up for 4 months. LAS was significantly more effective than TS in providing pain relief (P = 0.004) and better patient satisfaction (P = 0.020) at 4 weeks. Surgery (LAS and TS) was associated with significantly better fissure healing rates (both P < 0.001 at 16 weeks) and less recurrence (both P = 0.003) than nifedipine. There were substantial problems with compliance in the nifedipine group (17 of 41 patients), related to side-effects and slow healing. There were no differences in continence between the three treatment groups. CONCLUSION: LAS was most effective in providing pain relief and allowing rapid fissure healing, with minimal recurrence and no increased risk of incontinence, in patients with good anal sphincter function.     

Recent advances in the pharmacotherapy of chronic anal fissure: an update

Surgical sphincterotomy reduces anal tone and sphincter spasm and promotes ulcer healing. Because the surgery is associated with the side effect of faecal incontinence, pharmacological agents to treat chronic anal fissure have been explored recently. Glyceryl trinitrate (GTN) ointment (0.2%) has an efficacy of up to 68% in healing chronic anal fissure, but it is associated with headache as the major and most common side effect. Though botulinum toxin injected into the anal sphincter healed over 80% of chronic anal fissures, it is more invasive and expensive than GTN therapy. Diltiazem ointment achieved healing of chronic anal fissure comparable to 0.2% GTN ointment but was associated with fewer side effects. Other drugs that have been tried are lidocaine, the alpha-adrenergic antagonist indoramin, and the potassium channel opener minoxidil.     

Effect of topical glyceryl trinitrate on anodermal blood flow in patients with chronic anal fissures

Introduction : Recent studies have highlighted the role of increased internal anal sphincter pressure and decreased anodermal blood flow in the pathogenesis of chronic anal fissures. The duration of the effect of topical 0.2% glyceryl trinitrate (GTN) ointment on anodermal blood flow in fissure and normal areas was investigated in patients with chronic anal fissures. Methods : Six patients with chronic anal fissures in the posterior midline participated in the study. Blood flow measurements were performed on the anoderm using laser Doppler flowmetry before and immediately after the topical application of 0.2% GTN ointment and subsequent readings were taken at 5, 15, 30, 45 and 60 min in all four quadrants. Results : The mean anodermal blood flow in the fissure region is significantly lower than the mean blood flow of the rest of the anoderm before 0.2% GTN ointment is applied (228.7 ± 61.8 flux units vs 439.3 ± 25.5 flux units, respectively; P < 0.05). Immediately after the application of local 0.2% GTN ointment there is a significant increase in anodermal blood flow over the anal fissure region (457.8 ± 56.5 flux units; P < 0.05) compared to the rest of the anoderm (457.4 ± 30.8 flux units). This increase is most marked at 5 min post‐GTN ointment application in the fissure area (474.6 ± 41.1 flux units) and the blood flow in the fissure region is consistently above the rest of the anoderm for most of the 60 min. Conclusion : There is clearly reduced blood flow to the chronic anal fissure region compared to the rest of the anoderm. Topical application of glyceryl trinitrate ointment seems to significantly improve the blood flow to the fissured area in the first hour. This may therefore help in the healing of chronic anal fissures.     

A prospective, randomized, double-blind, placebo-controlled trial of glyceryl-trinitrate ointment in the treatment of children with anal fissure

BACKGROUND: Anal fissure in children usually is treated by sitz baths, stool softeners, and analgesic ointments. However, some cases are intractable to the treatment. In recent years, it has been reported that nitric oxide donors such as local glyceryl-trinitrate (GTN) ointment causes a reversible chemical sphincterotomy. Although the GTN ointment can be an alternative therapy for adult cases, it has not yet been studied in the children who suffer from anal fissure. METHODS: Sixty-five children with anal fissure were divided randomly into 3 groups. Each group received double-blinded a topical ointment that contained either 0.2% GTN, 10% lidocaine, or placebo. These ointments were applied to the lowest part of the anal canal twice daily. Patients were periodically reviewed, and the study was ended after 8 weeks. RESULTS: Complete healing of the fissure occurred in 26 of 31 (83.9%) patients treated with GTN, 7 of 14 (50%) patients treated with lidocaine, and 6 of 17 (35.2%) treated with placebo. In 29 of 31 (93.5%) GTN-treated patients, a total relief of symptoms was observed, whereas this occurred in 7 of 14 (50%) treated with lidocaine and 6 of 11 (35.3%) in the placebo group. The differences between the study group and control groups were highly statistically significant (P < .001). CONCLUSION: The majority of children suffering from anal fissure will be cured and have relief of symptoms after topical application of GTN ointment to the anal canal.     

Nonsurgical treatment of chronic anal fissure: nitroglycerin and dilatation versus nifedipine and botulinum toxin.

BACKGROUND: Surgical sphincterotomy for chronic anal fissure can cause fecal incontinence. This has led to the investigation of nonsurgical treatment options that avoid permanent damage to the internal anal sphincter. METHODS: We conducted a retrospective, ongoing chart review with telephone follow-up of 88 patients treated for chronic anal fissure between November 1996 and December 2002. During the first half of the study period, patients were treated with topical nitroglycerin and pneumatic dilatation. With the availability of new therapies in June 1999, subsequent patients received topical nifedipine and botulinum toxin injections (30-100 units). Lateral anal sphincterotomy was reserved for patients who failed medical treatment. RESULTS: In 98% of patients the fissure healed with conservative nonsurgical treatment. The combination of nifedipine and botulinum toxin was superior to nitroglycerin and pneumatic dilatation with respect to both healing (94% v. 71%, p < 0.05) and recurrence rate (2% v. 27%, p < 0.01). There was no statistical difference between the number of dilatations and botulinum toxin injections needed to achieve healing. Three patients who received botulinum toxin reported mild transient flatus incontinence. At an average telephone follow-up of 27 months, 92% of patients reported having no pain or only mild occasional pain with bowel movements. CONCLUSIONS: Chronic anal fissures can be simply and effectively treated medically without the risk of incontinence associated with sphincterotomy. Topical nifedipine and botulinum toxin injections are an excellent combination, associated with a low recurrence rate and minimal side effects.     

硝酸甘油软膏治疗肛裂的多中心随机对照研究

目的评价硝酸甘油软膏治疗肛裂的临床疗效和安全性。方法采用多中心、随机、双盲、安慰剂平行对照的临床试验方法,从7个临床中心入组240例慢性肛裂患者,按随机数字表法随机分为试验组（硝酸甘油软膏,120例）和对照组（凡士林软膏,120例）,疗程为8周。比较两组肛裂愈合率、肛裂疼痛强度VAS评分、肛管静息压的变化及不良反应事件发生率。结果共有221例（92．1％）完成了试验,其中试验组114例,对照组107例。治疗终点（56d）,试验组和对照组肛裂愈合率分别为78．9％（90／114）和29．0％（31／107）,排粪后肛裂疼痛VAS评分下降率分别为（94．8±15．7）％和（61．2±35．7）％,差异均有统计学意义（均P〈0．01）。试验组和对照组分别有12例和6例患者接受了肛门直肠测压,首次用药前后肛管静息压下降值试验组为（20．2±18．5）mmHg,对照组为（7．1±14．7）mmHg,但两组差异并无统计学意义（P=0．152）。试验组不良反应事件发生率明显高于对照组[42．1％（48／114）比913％（10／107）,P〈0．05],但不良反应事件主要为轻度的头痛、头胀,可自行缓解。结论硝酸甘油软膏可有效缓解肛裂疼痛,促进肛裂愈合,且使用安全、耐受性好。     

Randomised trial of topical 0.2% glyceryl trinitrate and lateral internal sphincterotomy for the treatment of patients with chronic anal fissure: long-term follow-up.

OBJECTIVE: To compare outcomes 24 months after treatment of chronic anal fissure with 0.2% glyceryl trinitrate ointment (GTN) or lateral internal sphincterotomy. DESIGN: Prospective, randomised trial. SETTING: One teaching, one private, and 3 district hospitals, U.K. SUBJECTS: Seventy patients were randomised into two groups of 35 each to use 0.2% GTN ointment or have a lateral internal sphincterotomy. MAIN OUTCOME MEASURES: Resolution of symptoms and healing of fissures assessed after 24 months. RESULTS: All those operated on were initially cured but one fissure recurred after 8 months. Nineteen of 35 fissures treated with GTN healed. The remaining 16 patients randomised to use GTN ointment whose fissures did not heal were then treated by sphincterotomy. Three patients whose fissures healed successfully with GTN developed recurrences within 6 months of completing treatment. The remaining 16 of 19 patients treated with GTN whose fissures healed were free of symptoms with no clinical evidence of recurrence after 24 months follow-up. CONCLUSIONS: Many anal fissures heal with topical treatment with GTN. Lateral internal sphincterotomy remains effective but should be reserved for patients who fail to respond to initial chemical sphincterotomy.     

Fissure-in-ano, to divide or not to divide?

Anal fissure is one of the most common and painful proctological pathologies affecting mainly young individuals. The physiopathology in the development of a chronic anal fissure seems to be a combination of internal anal sphincter hypertonia and poor vascularization at the posterior midline. Treatment of acute fissures is conservative with supportive therapy, leading to healing in the majority of the patients. Open or closed lateral internal sphincterotomy is the treatment of choice for chronic anal fissures. In low pressure chronic fissures, sphincterotomy should be avoided and a V-Y island advancement flap may be an alternative procedure. Sphincterotomy can induce anal incontinence, a feared complication of this technique. Recent interest has developed in chemical sphincterotomy with local botulin toxin injections or glyceryl trinitrate application. Long-term follow-up is needed to evaluate these new therapeutic options.     

CUT OR PASTE? THE USE OF GLYCERYL TRINITRATE PASTE IN THE TREATMENT OF ACUTE AND CHRONIC ANAL FISSURE

Background : Anal fissure unresponsive to conservative measures such as stool softeners frequently requires surgical intervention. The present study describes the use of glyceryl trinitrate (GTN) in the treatment of acute and chronic anal fissure. Methods : Eighteen consecutive patients with anal fissure were treated with 0.5% GTN paste in soft white paraffin applied twice daily to the anus. These patients were followed at regular intervals to assess symptom control, rate of healing, adverse effects and recurrence rate. Results : Two patients were lost to follow‐up. Twelve of the remaining 16 were cured. Of these, symptomatic relief was obtained for most within 2 days, and for all within 1 week. No patient required cessation of treatment due to adverse effects. Treatment failed in four of 16 patients. Two of these patients subsequently underwent successful surgical procedures, and two patients (while not completely cured) had sufficient symptomatic relief to decide against surgery. Conclusions : The use of GTN paste in the treatment of acute and chronic anal fissure may be a safe and effective modality that can be considered as first‐line treatment for this condition.     

Audit of topical glyceryl trinitrate for treatment of fissure-in-ano

PURPOSE: To clarify the clinical role of topical glyceryl trinitrate (GTN) in the management of anal fissures. PATIENTS AND METHODS: Fifty-six consecutive patients with fissure-in-ano attending a colorectal clinic from April 1997 to May 1998 included 16 acute and 40 chronic anal fissures. Patients were instructed to apply 0.2% 0.5 g of GTN to the painful area of the anus. Patients were followed-up in the clinic at 4, 8 and 12 weeks, and by telephone interviews at a median follow up of 10 months. RESULTS: Ten of 16 acute fissures (63%) were healed by 4 weeks and 13 (81%) by 8 weeks. Thirteen of 40 chronic fissures (33%) were healed by 8 weeks and 20 (50%) by 12 weeks. Seventeen patients (30%) underwent lateral sphincterotomy and all healed. There were five recurrences within 3 months of treatment with GTN. Thirty-four (61%) suffered from headaches, eight being severe headaches. None of the patients developed incontinence with GTN or lateral sphincterotomy. CONCLUSIONS: Treatment of fissure-in-ano using GTN ointment was effective in up to 50% of patients with chronic anal fissure, and has the benefit of being repeatable if the fissure recurs. Patients should be aware that treatment is likely to take some months to be effective and is associated with significant side effects in up to 15% of patients.     

Randomized prospective controlled trial of lateral internal sphincterotomy versus injection of botulinum toxin for the treatment of idiopathic fissure in ano

BACKGROUND: Chronic anal fissure is a significant cause of morbidity. Internal sphincterotomy has long been the operative treatment of choice. Concerns remain, however, on its effects on continence. Botulinum toxin has been used as an agent for chemical sphincterotomy, causing temporary alleviation of sphincter spasm and allowing the fissure to heal. The aim of the present study was to compare the results of sphincterotomy to botulinum toxin. METHODS: The study was designed as a randomized controlled trial. All adult patients over the age of 18 with chronic idiopathic fissure in ano who had failed conservative treatment were included in the trial. Patients were randomized to receive either Botox or sphincterotomy. Pain, healing of fissure and continence scores were the outcomes assessed. RESULTS: A total of 38 patients were studied. Seventeen patients were randomized to receive Botox and 21, sphincterotomy. Patients in the Botox group were found to have significantly higher 2-week pain scores and reoperation rates, and poor healing. Continence scores were not significantly different in the two groups. CONCLUSION: Sphincterotomy gives better results than Botox in the treatment of fissure. Botox, however, is safe with no complications and no detriment to continence and could be used in certain situations.     

Topical diltiazem ointment in the treatment of chronic anal fissure

BACKGROUND: Chronic anal fissure has traditionally been treated surgically. Initial enthusiasm for chemical sphincterotomy has waned because of poor outcomes with glyceryl trinitrate ointment. In this study the use of topical 2 per cent diltiazem ointment has been investigated as an alternative method of chemical sphincterotomy. METHODS: A prospective assessment of 71 consecutive patients with a chronic anal fissure treated with 2 per cent topical diltiazem ointment for a median duration of 9 (range 2--16) weeks was performed. RESULTS: Fifty-one patients (75 per cent) experienced healing of the fissure after 2--3 months of treatment with topical diltiazem. Seventeen patients who did not heal were treated for a further 8 weeks with topical diltiazem. Eight of these patients subsequently healed with diltiazem. Fifty-nine of 67 patients who completed follow-up therefore healed on diltiazem ointment. Four patients experienced perianal dermatitis and one patient experienced headaches. No other side-effects were recorded. After a median of 32 (range 14--67) weeks' follow-up following completion of treatment, 27 of 41 patients available remain symptom free. Six of seven patients with recurrent fissure were treated successfully by repeat chemical sphincterotomy. CONCLUSION: Topical 2 per cent diltiazem ointment used as an agent for chemical sphincterotomy for chronic anal fissure offers significant healing rates but does not have a significant side-effect profile, which may aid compliance to treatment. Early recurrences are common but usually amenable to further chemical sphincterotomy.