Operating proctoscopes designed for use in rectal anastomosis by stapling techniques

New operating proctoscopes have been designed that facilitate the passage of a stapling head without its anvil in rectal procedures which call for this technique to be used.     

Colorectal anastomosis using a novel double-stapling technique for lower rectal carcinoma

Background The conventional double-stapling technique (DST) using a standard linear stapler horizontally is sometimes difficult to apply to an anastomosis where the pelvis is narrow or the anastomosis is ultralow. In this report, we review our experiences of a novel DST (IO-DST) that employs vertical division of the rectum using an endostapler. Materials and methods One-hundred and five consecutive patients who underwent low anterior resection for rectal carcinoma below the peritoneal reflection were enrolled into this study. The clinical, oncological, and functional outcomes were studied retrospectively. Results The median distance from the anal verge to the tumor was 5.0 cm in “high risk” T1 tumors and 6.5 cm in more-advanced tumors. More than 2 cm of distal surgical margin was obtained in 80.6% of the patients with tumors deeper than T1. The median distance from the anal verge to the anastomosis was 4.2 cm in T1 tumors and 4.0 cm in more-advanced tumors. The median blood loss was 315 ml, and the median operative time was 262 min. There was no mortality in the IO-DST. Recurrence presented in 12 (13.0%) of the patients who underwent curative surgery, with local recurrence in four patients (4.3%) during a median follow-up of 46.2 months. However, no patients experienced suture-line recurrence. The early bowel frequency was four times/day after stoma closure in patients with transient covering colostomy and 3.5 times/day in patients without colostomy. The late bowel frequency was three times/day in patients with transient covering colostomy, and two times/day in patients without colostomy. Conclusions The IO-DST is a feasible and safe procedure for facilitating lower anastomosis in rectal carcinoma below the peritoneal reflection.     

Outcomes for Abdominoperineal Resections Are Not Worse Than Those of Anterior Resections

Purpose Local recurrence and cure rates following abdominoperineal resections have been reported to be much worse than sphincter-preserving anterior resections. We compared the oncologic outcomes of patients treated by abdominoperineal resections with those following sphincter-preserving anterior resections. Methods The medical records of patients who underwent radical rectal resection for rectal carcinoma at the Colorectal Surgery Department, Singapore General Hospital, during the period from April 1989 to April 2002 were reviewed. A total of 791 cases were studied. Operative procedures were classified as either abdominoperineal resections or anterior resections with either straight or pouch anastomosis. Total mesorectal excision was routinely performed for carcinomas of the lower middle and lower third of the rectum. Sentinel events, including local and systemic recurrences or morbidity and mortality, were tracked prospectively. Results There were a total of 93 abdominoperineal resections (12.1 percent), 547 anterior resections with straight anastomoses (71 percent), and 130 anterior resections with pouch anastomoses (16.9 percent). Postoperative mortality was 2.6 percent and postoperative morbidity was 13.6 percent with an overall anastomotic leakage rate of 2.5 percent. The cumulative five-year local recurrence rate was 5.4 percent for abdominoperineal resections, 3.6 percent for anterior resections with straight anastomoses, and 3.8 percent for anterior resections with pouch anastomoses (P = 0.73 by log-rank test). The median time to local recurrence also did not differ significantly between the different procedures (abdominoperineal resections, 17 months, anterior resections with straight anastomoses, 18 months, anterior resections with pouch anastomoses, 13 months). Independent predictors for local recurrence included advanced tumor stage, tumor depth, and poorly differentiated tumors. The five-year cancer-specific survival was 70 percent. The type of anastomosis did not influence disease-free survival with median disease-free survival for patients who underwent abdominoperineal resections being 100 months, survival of anterior resections with straight anastomoses being 135 months, and survival of anterior resections with pouch anastomoses being 121 months (P = 0.33 by log-rank test). The independent factors for poor survival were age greater than 65 years, advanced tumor stage, tumor depth, and poorly differentiated tumors. Conclusion Both abdominoperineal resections and sphincter-preserving anterior resections can be performed safely with low morbidity and mortality in a specialized high-volume hospital unit without compromising oncologic outcomes. With appreciation of the anatomic relations in total mesorectal excision and standardized consistent surgical technique, the oncologic outcomes of patients treated by abdominoperineal resections are not worse than those treated by sphincter-preserving anterior resections. Reprints are not available.     

The value of omentoplasty in protecting colorectal anastomosis from leakage. A prospective randomized study in 126 patients

BACKGROUND/AIMS: Anastomotic leakage is a major cause of mortality in colorectal surgery. Several methods have been evaluated in order to prevent anastomotic leakage. To decrease the rate and severity of anastomotic leakage, omentoplasty (OP) has been proposed by several authors on the basis of experimental and clinical studies. A prospective, randomized trial was designed to study the influence of omentoplasty on anastomotic leakage after colorectal resection. METHODOLOGY: One hundred and twenty-six patients undergoing elective or emergency surgery for malignancy, benign tumor, diverticular disease and other were randomly assigned to omentoplasty (OP group) or not (NO group). The primary end point was the rate of clinical and radiological anastomotic leakage. Both groups were comparable in terms of demographic data, preoperative characteristics and intraoperative findings. RESULTS: Eighteen patients (14.3%) had anastomotic leakage, 4 (6.4%) in the OP group and 14 (21.9%) in the NO group. Significant differences (P<0.05) between the two groups were also found in terms of repeat operation (3.2% vs. 14.1%) and deaths (3.2 vs. 7.8%). Other factors associated with anastomotic leakage were the distal site of anastomosis (<5 cm from anal verge) and the emergency. CONCLUSIONS: Omental wrap, with its mechanical and biological properties, seems to be effective in lowering the rate and the severity of anastomotic leakage after colorectal surgery.     

Omentum as a cover for abdominal wall loss

A case of necrotising fasciitis with full-thickness loss of the entire abdominal wall is reported after an uncomplicated elective low anterior resection. Salvage was accomplished by early wide surgical extirpation and repeated re-explorations and debridements. The presence of ample omentum helped prevent evisceration and allowed granulation tissue to gradually seal the abdominal cavity over a period of 4 months without further reconstructive procedures.     

Is Rectal Washout Effective for Preventing Localized Recurrence After Anterior Resection for Rectal Cancer?

PURPOSE  The present study evaluated the effect of rectal washout in reducing local recurrence after resection for rectal cancer. METHODS  A literature search was performed on studies published since 1989 that compared rectal washout to no washout for rectal cancer resection. Primary end point was local cancer recurrence. Random-effect meta-analysis was used and subgroup analysis was performed. RESULTS  Five studies matched the selection criteria, and reported on 176 patients who underwent rectal washout and 256 who did not undergo washout. Different washout solutions were used in every study, and total mesorectal excision was not universally applied. Overall local recurrence rate was 8 percent (33/432). Local recurrence rate for rectal washout patients was 4.8 percent compared with 10.2 percent for patients who did not undergo rectal washout, a difference that was not statistically significant (odds ratio = 0.64; 95 percent confidence interval = 0.2–2.04). When only studies using total mesorectal excision were considered, there was no significant difference between the two groups (odds ratio = 1.21; 95 percent confidence interval = 0.37–3.92). CONCLUSIONS  Although no definitive conclusions may be drawn because of the nonrandomized nature of the included studies, rectal washout is relatively risk-free and adds little to the operative time. This may be performed until a randomized, controlled trial is undertaken to resolve this contentious issue.     

Defunctioning stoma in low anterior resection with colonic pouch for rectal cancer: a comparison between two hospitals with a different policy

PURPOSE: The aim of this study was to compare surgical outcome, after low anterior resection for rectal cancer with colonic J-pouch, at two departments with a different policy regarding the use of a routine diverting stoma. METHODS: A total of 161 consecutive patients with invasive rectal carcinomas operated on between 1990 and 1997 with a total mesorectal excision and a colonic J-pouch were included in the study. Eighty patients were operated on in a surgical unit using routine defunctioning stomas (96 percent), whereas 81 were operated on in a department in which diversion was rarely used (5 percent). Recorded data with respect to surgical outcome were analyzed and compared. RESULTS: There was no difference between the two centers in postoperative mortality in connection with the primary resection and subsequent stoma reversal (3.7 vs. 3.8 percent). No significant difference could be found in the number of patients with pelvic sepsis (anastomotic leaks; 9 vs.12 percent). Surgical outcome in patients with pelvic sepsis was also similar. The frequency of reoperations associated with the anterior resection and subsequent stoma reversal was identical (14 percent). The total hospital stay (primary operation and stoma reversal) was significantly longer with than without a routine stoma (17 (range, 2–59) vs. 12 (range, 5–55) days, respectively; P < 0.001). CONCLUSION: This study suggests that the routine use of diversion does not protect the patient from anastomotic complications or pelvic sepsis and its use requires a second admission for closure.     

低位直肠癌患者使用直肠拖出切除吻合术的临床优势

目的探讨低位直肠癌患者使用直肠拖出切除吻合术的临床优势,为该手术的临床应用提供理论支持。 方法对重庆市人民医院36例低位直肠癌患者随机分为实验组及对照组,每组各18例,实验组行直肠拖出切除吻合术,对照组行经腹直肠前切除吻合术。评估两组患者的的临床指标、肛门功能以及其预后情况。 结果对两组的临床基本资料进行比较,其中手术时间（t=15.728,P=0.000）、住院天数（t=4.391,P=0.044）、术中出血量（t=5.231,P=0.029）差异具有统计学意义（均P<0.05）;对两组患者术后不同时段的肛门功能进行比较,其中6个月时各等级（t=10.000,P=0.040）差异具有统计学意义;对两组患者的预后情况进行比较,其中两组患者在复发例数上（χ²=4.500,P=0.034）差异具有显著统计学意义。 结论低位直肠癌患者使用直肠拖出切除吻合术能有效的减少患者的手术时间,提高患者的生活质量,不失为一种安全、可行的手术方法。     

Procidentia in identical twins

Within a six-week interval, adult identical twin brothers presented with third-degree complete rectal prolapse. Since no other predisposing factors were evident, contribution of an inherited predisposition is implied. Evaluation of alternatives supports use of presacral rectal mobilization with subtotal anterior resection and reanastamosis of sigmoid colon and rectum as the curative procedure.     

A simplified draping of patients in the lithotomy-trendelenburg position for anterior resection by stapling or abdominoperineal excision of the rectum

Thorlakson RH. A simplified draping of patients in the lithotomy-Trendelenburg position for anterior resection by stapling or abdominoperineal excision of the rectum.     

Laparoscopic rectal cancer surgery: Where do we stand?

Large comparative studies and multiple prospective randomized control trials (RCTs) have reported equivalence in short and long-term outcomes between the open and laparoscopic approaches for the surgical treatment of colon cancer which has heralded widespread acceptance for laparoscopic resection of colon cancer. In contrast, laparoscopic total mesorectal excision (TME) for the treatment of rectal cancer has been welcomed with significantly less enthusiasm. While it is likely that patients with rectal cancer will experience the same benefits of early recovery and decreased postoperative pain from the laparoscopic approach, whether the same oncologic clearance, specifically an adequate TME can be obtained is of concern. The aim of the current study is to review the current level of evidence in the literature on laparoscopic rectal cancer surgery with regard to short-term and long-term oncologic outcomes. The data from 8 RCTs, 3 meta-analyses, and 2 Cochrane Database of Systematic Reviews was reviewed. Current data suggests that laparoscopic rectal cancer resection may benefit patients with reduced blood loss, earlier return of bowel function, and shorter hospital length of stay. Concerns that laparoscopic rectal cancer surgery compromises short-term oncologic outcomes including number of lymph nodes retrieved and circumferential resection margin and jeopardizes long-term oncologic outcomes has not conclusively been refuted by the available literature. Laparoscopic rectal cancer resection is feasible but whether or not it compromises short-term or long-term results still needs to be further studied.     

Preoperative irradiation affects functional results after surgery for rectal cancer

PURPOSE: The Swedish Rectal Cancer Trial has unequivocally demonstrated that preoperative high-dose (5 × 5 Gy) radiotherapy reduces local failure rates and improves overall survival. This will have an impact on the primary treatment of rectal cancer. This study investigates the effect of preoperative high-dose radiotherapy on long-term bowel function in patients treated with anterior resection. METHODS: A questionnaire was answered by 92 percent (203/220) of patients who were included in the Swedish Rectal Cancer Trial and who were alive after a minimum of five years. Thirty-two patients were excluded, mainly because of postoperative stomas and dementia, which left 171 for analysis. RESULTS: Median bowel frequency per week was 20 in the irradiated group (n=84) and 10 in the surgery-alone group (n=87;P<0.001). Incontinence for loose stools (P<0.001), urgency (P<0.001), and emptying difficulties (P<0.05) were all more common after irradiation. Sensory functions such as discrimination between gas and stool and ability to safely release flatus did not, however, differ between groups. Thirty percent of the irradiated group stated that they had an impaired social life because of bowel dysfunction, compared with 10 percent of the surgery-alone group (P<0.01). CONCLUSIONS: The study indicates that high-dose radiotherapy influences long-term bowel function, thus emphasizing the need for finding predictive factors for local recurrence to exclude patients with a very high probability for cure with surgery alone and to use optimized radiation techniques.Supported by the Swedish Cancer Society (Grant 1921-B97-15XCC).Read at the meeting of The American Society of Colon and Rectal Surgeons, Philadelphia, Pennsylvania, June 22 to 26, 1997.     

Systematic review of oncological outcomes following laparoscopic vs open total mesorectal excision

AIM: To systematically analyze the randomized trials comparing the oncological and clinical effectiveness of laparoscopic total mesorectal excision (LTME) vs open total mesorectal excision (OTME) in the management of rectal cancer.METHODS: Published randomized, controlled trials comparing the oncological and clinical effectiveness of LTME vs OTME in the management of rectal cancer were retrieved from the standard electronic medical databases. The data of included randomized, controlled trials was extracted and then analyzed according to the principles of meta-analysis using RevMan^® statistical software. The combined outcome of the binary variables was expressed as odds ratio (OR) and the combined outcome of the continuous variables was presented in the form of standardized mean difference (SMD).RESULTS: Data from eleven randomized, controlled trials on 2143 patients were retrieved from the electronic databases. There was a trend towards the higher risk of surgical site infection (OR = 0.66; 95%CI: 0.44-1.00; z = 1.94; P < 0.05), higher risk of incomplete total mesorectal resection (OR = 0.62; 95%CI: 0.43-0.91; z = 2.49; P < 0.01) and prolonged length of hospital stay (SMD, -1.59; 95%CI: -0.86--0.25; z = 4.22; P < 0.00001) following OTME. However, the oncological outcomes like number of harvested lymph nodes, tumour recurrence and risk of positive resection margins were statistically similar in both groups. In addition, the clinical outcomes such as operative complications, anastomotic leak and all-cause mortality were comparable between both approaches of mesorectal excision.CONCLUSION: LTME appears to have clinically and oncologically measurable advantages over OTME in patients with primary rectal cancer in both short term and long term follow ups.     

Influence of Intraoperative and Postoperative Radiotherapy on Functional Outcome in Patients Undergoing Standard and Deep Anterior Resection for Rectal Cancer

Purpose This study was designed to investigate the influence of intraoperative and postoperative radiotherapy on functional outcome after rectal resection for rectal cancer. Methods One hundred patients who underwent deep or standard anterior resection for rectal cancer were included in this follow-up study. All patients filled out questionnaires regarding morbidity and functional outcome; a subgroup (n = 63) underwent further clinical evaluation. The results were stratified according to radiation: Group I, no radiation (n = 37); Group II, only intraoperative radiation (n = 12); Group III, intraoperative and postoperative radiation (n = 51). Results Anal continence measured by Kirwan-Parks classification and Wexner score was significantly different within the three groups (P < 0.005, P < 0.0001), whereas continence impairment was least in Group I and greatest in Group III. Patients in Group III demonstrated a significantly worsecategory in the Kirwan-Parks classification and worse Wexner scores compared with patients in Group I (P < 0.0001). Patients only having undergone intraoperative radiotherapy had a significantly worse continence (Kirwan-Parks classification) than patients without any radiotherapy (P < 0.05). More patients after intraoperative and postoperative radiation therapy complained of fragmented stools (P < 0.05) and urgency (P < 0.05) compared with patients only having undergone surgery; the need towear pads was higher (P = 0.001). Vector volume manometry revealed better resting sphincter function in Group I compared with Group III (P ≤ 0.005). Conclusions Patients with anterior resection for rectal cancer who undergo full-dose radiotherapy have significantly more impairment of anorectal function than patients without radiotherapy. Patients who were only exposed to intraoperative radiotherapy showed moderate impairment of continence function, suggesting that the influence of radiotherapy on anal function may be dose-dependent and application-dependent.     

Local recurrence of rectal carcinoma after hand-sewn and stapled anastomoses

A retrospective analysis was conducted of 119 consecutive patients in whom potentially curative anterior resection of invasive rectal carcinoma was performed between 1976 and 1982. Seventy-six anastomoses were stapled and 43 were hand-sewn. The distributions of tumor stage, location, histologic grade, size, and margins of resection were similar for both groups. The probability of local recurrence by two years for middle rectal tumors was 26±7 percent for the group with stapled anastomoses and 10±7 percent for those with hand-sewn anastomoses (P=0.07, log-rank test). Local recurrence probabilities did not differ for upper rectal tumors (P=0.14) or lower rectal tumors (P=0.20). Anatomic considerations that encourage use of the stapler may explain our findings. Read at the joint meeting of the American Society of Colon and Rectal Surgeons with the Section of Colo-Proctology, Royal Society of Medicine, and the Section of Colonic and Rectal Surgery, Royal Australasian College of Surgeons, New Orleans, Louisiana, May 6 to 11, 1984.     

Anterior resection for complete rectal prolapse

One hundred thirteen patients underwent anterior resection for complete rectal prolapse betwen 1968 and 1980. These patients were followed for an average of seven years; recurrence developed in eight patients (9 percent). Recurrences were found to occur at three months to eight years postoperatively, and the probability of a recurrence at two, five, and ten years was 3 percent, 6 percent, and 12 percent, respectively. Operative mortality was 1 percent and morbidity was 29 percent. Low anterior resectioin, with anastomosis in the deperitonealized portion of the colon, was found to increase morbidity without significantly decreasing recurrence when compared with high anterior resection. The effects of repair on patient continence were unpredictable. High anterior resection is preferable to low anterior resection in the treatment of rectal prolapse and offers results comparable to those of other repairs currently being performed.     

Laparoscopic Surgery in Rectal Cancer: A Prospective Analysis of Patient Survival and Outcomes

Purpose The role of laparoscopic resection in the management of rectal cancer is still controversial. We prospectively evaluated patient survival and outcomes in patients undergoing laparoscopic rectal resection for rectal cancer at a single institution. Methods From November 1999 to November 2005, 107 patients with rectal cancer were treated by laparoscopy. Exclusion criteria were: metastatic disease, advanced disease with invasion of adjacent structures, clinical or radiologic involvement of the external anal sphincter, previous colonic resection, synchronous colonic adenocarcinoma, and contraindications to laparoscopy. All patients were followed prospectively for survival and complications. Survival was calculated by the Kaplan-Meier method. Results A laparoscopic sphincter-saving procedure was performed in 104 patients, 2 patients had a laparoscopic Miles operation, and 1 underwent a laparoscopic Hartmann’s procedure. Mean operating time was 278 (range, 135–430) minutes. Conversion to open surgery was required in 20 of 107 patients (18.7 percent). Overall morbidity was 27 percent, anastomotic leakage occurred in 14 of 104 patients (13.5 percent). There was no postoperative mortality. A mean of 18 (range, 1–49) lymph nodes was removed. Mean distance of distal margin from tumor was 2.6 (range, 0.5–10) cm; in two patients there was microscopic invasion of the distal margin. Mean hospital stay was nine (range, 4–43) days. Mean follow-up was 35.8 months. There was local recurrence in 1 of 107 patients (0.95 percent); there were no port site metastases. Actuarial five-year and disease-free survival rates are 81.4 and 79.8 percent, respectively. Conclusions Laparoscopic rectal surgery is feasible and oncologically radical but also technically demanding (conversion rate, 18.7 percent), time-consuming (mean operating time, 278 minutes), and associated with specific intraoperative complications. At present, the technique should only be performed in specialist centers by teams experienced in laparoscopic surgery. Presented at the meeting of The Society for Surgery of the Alimentary Tract, Los Angeles, California, May 20 to 24, 2006.     

Colonic J-Pouch vs. Coloplasty Following Resection of Distal Rectal Cancer

PURPOSE: In terms of functional outcome, there is evidence of the superiority of the colonic J-pouch over a straight coloanal anastomosis. Even though the colonic J-pouch was created to restore a neorectal reservoir, manometric data show that the volume of a short colonic J-pouch does not differ from a straight coloanal anastomosis. We speculate that the advantage of the colonic J-pouch is not in creating a larger neorectal reservoir, but rather related to decreased motility. Maurer and Zgraggen recently described a new colonic pouch design, performing a transverse coloplasty pouch. The purpose of this pilot study was to compare the feasibility and functional outcome of the 5-cm colonic J-pouch vs. the coloplasty pouch. METHODS: From February 2000 to June 2001, we randomized 40 consecutive patients with distal rectal cancer (<12 cm from the anal verge) into the J-pouch or coloplasty group. A low rectal resection and coloanal anastomosis was performed in all patients. Functional data were collected by a standardized questionnaire and anorectal manometry, preoperatively and six months postoperatively. Primary end points of the study were potentially differences of both groups regarding technical feasibility, stool frequency, and anorectal manometry. RESULTS: The construction of a coloplasty pouch was feasible in all cases of the coloplasty group, but not in 5 of 20 (25 percent) patients of the J-pouch group, because of colonic adipose tissue. Six months after operation or stoma closure, respectively, stool frequency was 2.75 ± 1 per day in the J-pouch group and 2 ± 2 per day in the coloplasty group. There was no significant difference in resting and squeeze pressure and neorectal volume between both groups, but an increased neorectal sensitivity in the coloplasty group. CONCLUSION: We found similar functional results in the coloplasty group compared to the J-pouch group. The neorectal sensitivity was increased in the coloplasty group. Therefore, the colonic coloplasty seems to be an attractive pouch design because of its feasibility, simplicity, and effectiveness.     

Routine Mobilization of the Splenic Flexure is not Necessary During Anterior Resection for Rectal Cancer

Purpose Splenic flexure mobilization is widely considered to be an essential component of anterior resection for rectal cancer. It was our hypothesis that selective splenic flexure mobilization would reduce operative times without increasing morbidity or affecting cure. Methods A total of 100 consecutive patients with rectal cancer (mean 8 (range, 4–15) cm from anal verge) who underwent anterior resection for cure between 1996 and 2002 had splenic flexure mobilization only as required to achieve a tension-free anastomosis. Operative time, postoperative morbidity, pathologic findings, and recurrence rates were recorded. Results There were no clinicopathologic differences between those who had splenic flexure mobilization (n = 26) and those who did not (n = 74). Mean operative time in the splenic flexure mobilization group was longer, 167 (range, 130–200) minutes vs. 120 (range, 95–180) minutes in the nonmobilized group (P = 0.023). Mean length of specimen resected was longer in the splenic flexure mobilization group: 36 vs. 18 cm (P = 0.008). Anastomotic complications (4 percent), local recurrence (7 percent, median follow-up, 38 months), perioperative morbidity (32 percent) and mortality (2 percent), and survival did not differ between the two groups. Conclusions Routine splenic flexure mobilization is not required for safe anterior resection in patients with rectal cancer. Avoiding splenic flexure mobilization results in shorter operative times and does not increase postoperative morbidity, anastomotic leakage, or local recurrence. Presented at the Freyer Surgical Meeting, Galway, Ireland, September 2 to 3, 2005.