Introduction: Laparoscopic lavage and drainage (LLD) emerged as an alternative to Hartmann's procedure (HP) for patients with diverticulitis and uncontained perforation. Although initially popular as a less invasive approach, its use in modern practice is in question. This summary will review the available literature to show techniques, outcomes, and indications. Methods: The literature was reviewed for relevant case studies, randomized trials, prospective series, retrospective analyses, and meta-analyses to define peritoneal lavage and determine the clinical outcomes of peritoneal lavage. Results: LLD can be considered on an individual basis for Hinchey III diverticulitis (purulent peritonitis), but there are several contraindications. The extent of adhesionolysis (limited versus extensive) as well as the management of sites of perforation found during surgery are debated. Most surgeons continue lavage with warm saline until water runs clear and place drains in the operation. Three randomized controlled trials (RCTs), the LADIES, SCANDIV, and DILALA trials compared LLD with either resection and anastomosis or Hartmann's procedure. One other RCT (the LapLAND trial) is still with results pending. The LADIES trial studied LLD versus primary anastomosis and resection in Hinchey III diverticulitis and was terminated early secondary to higher 30-day morbidity in the LLD arm; however, 3-year data showed no significant difference in morbidity and mortality. The SCANDIV trial compared LLD with resection in acute diverticulitis (Hinchey I-III) and saw no difference in 90-day morbidity or mortality; however, it noted higher rates of reoperation in the LLD group. The DILALA trial compared Hinchey III diverticulitis patients undergoing LLD with open HP and found that the LLD group had a lower rate of reoperation at 2 years, but no difference in rates of readmission or mortality. Conclusions: Debate still remains over the technique of LLD and specific indications, as well as outcomes compared with resection and primary anastomosis or HP.

Introduction: Historically, colon resection was recommended after one episode of complicated diverticulitis. However, current trends favor a more individualized approach. This review examines elective sigmoidectomy for complicated diverticulitis as well as robotic approaches for diverticular disease.Methods: The literature was reviewed for timely (post 2000) and relevant articles regarding robotics and diverticulitis. The articles included large prospective series, retrospective analysis, meta-analyses and randomized controlled trials.Results: Primary anastomosis with or without protective ileostomy has emerged as an alternative to the Hartman's procedure in emergent or urgent surgery in patients without significant comorbidities. Elective sigmoidectomy after an episode of complicated diverticulitis should be decided on a case-by-case basis considering patient characteristics, continued subacute symptoms, complications from the disease, and chance of recurrence episodes.Conclusions: There are several variations techniques for robotic sigmoidectomy outlined in this article, and familiarity with all can help depending on the logistics of the case. Minimally invasive colectomy provides superior patient satisfaction and outcomes.

Introduction: Colonic intussusception is a rare form of bowel obstruction in which a segment of the colon telescopes into the adjacent distal portion of the bowel.1 This condition may resolve and recur, or it may lead to a complete obstruction, necrosis of the bowel, and additional complications if untreated. Causes of colonic intussusception in adults include benign polyps, lipomas, lymphoid hyperplasia, or malignant tumors.2 This video depicts a colonic intussusception and a robotic resection entailing a right hemicolectomy to treat the underlying etiology.

Background Veterans undergoing elective surgery for diverticular disease have an ostomy creation rate of 18%. The purpose of this study was to analyze the outcomes and timing of ostomy reversal surgery, perioperative complications, and differences between colostomy and ileostomy reversal outcomes. Methods A retrospective review of the Veterans Affairs Surgical Quality Improvement Project (VASQIP) database was performed. Patients undergoing elective colectomy for diverticular disease between 2004 and 2018 were identified. Demographics, comorbidities, ostomy type, time to reversal, and postoperative complications were analyzed. Results 4,198 patients underwent elective colectomy for diverticular disease, with 751 patients (17.9%) receiving an ostomy. Of patients who received an ostomy, 407 had ostomy reversal surgery within the Veterans Health Administration system (54.2%), with 243 colostomies, 149 ileostomies, and 15 unspecified. Median time to ostomy reversal was 5.0 months (interquartile range 3.2, 7.8). Complication rate after reversal was 23.1%; surgical site infection was most common (9.1%). Patients with American Society of Anesthesiologists classification >3 (adjusted odds ratio (aOR) = .40[.22-.72]), increasing age (aOR = .98[.97-.99]), laparoscopic index procedure (aOR = .42[.27-.63]), and hypertension (aOR = .63[.46-.87]) were less likely to have their ostomy reversed. There were no differences in postoperative complication rates after ostomy vs ileostomy reversals. Reversals after 4.6 months were associated with 3.4-times higher odds of complications. Conclusion Ostomy creation and reversal rates are similar between the veteran and non-veteran populations in the United States. Delays in reversal surgery were associated with worse postoperative outcomes, which underscore the importance of close follow-up for patients with an ostomy after elective colectomy for diverticular disease.

Racial disparities in colorectal surgery outcomes have been studied extensively in the USA, and access to healthcare resources may contribute to these differences. The Veterans Health Administration (VHA) is the largest integrated healthcare network in the USA with the potential for equal access care to veterans. The objective of this study is to evaluate the VHA for the presence of racial disparities in 30-day outcomes of patients that underwent colorectal resection. Colon and rectal resections from 2008 to 2019 were reviewed retrospectively using the Veterans Affairs Surgical Quality Improvement Program database. Patients were categorized by race and ethnicity. Multivariable analysis was used to compare 30-day outcomes. Cases with “unknown/other/declined to answer” race/ethnicity were excluded. Thirty-six-thousand-nine-hundred-sixty-nine cases met inclusion criteria: 27,907 (75.5%) Caucasian, 6718 (18.2%) African American, 2047 (5.5%) Hispanic, and 290 (0.8%) Native American patients. There were no statistically significant differences in overall complication incidence or mortality between all cohorts. Compared to Caucasian race, African American patients had longer mean length of stay (10.7 days vs. 9.7 days; p < 0.001). Compared to Caucasian race, Hispanic patients had higher odds of pulmonary-specific complications (adjusted odds ratio with 95% confidence interval = 1.39 [1.17–1.64]; p < 0.001). The VHA provides the benefits of integrated healthcare and access, which may explain the improvements in racial disparities compared to existing literature. However, some racial disparities in clinical outcomes still persisted in this analysis. Further efforts beyond healthcare access are needed to mitigate disparities in colorectal surgery. [Outcomes]; [Database]; [Veterans]; [Colorectal Surgery]; [Morbidity]; [Mortality].

Background: Treatment for diverticular disease has evolved over time. In the United States, there has been a trend towards minimally invasive surgical approaches and fewer postoperative complications, but no study has investigated this subject in the Veterans Health Administration. Methods: This retrospective review identified patients undergoing elective surgery for diverticular disease from 2004 to 2018. Demographics, comorbidities, operative approach, rates of ostomy creation, and 30-day outcomes were compared. The 15-year time period was divided into 3-year increments to assess changes over time. Results: 4198 patients were identified. Complication rate decreased significantly over time (28.1%-15.7%, p < 0.001), as did infectious complications (21.5-6.3%, p < 0.001). Median hospital length-of-stay decreased from 7 to 5 days (p < 0.001). Rates of laparoscopic surgery increased over time (17.7% -48.1%, p < 0.001). Conclusions: Increased utilization of laparoscopy in veterans undergoing elective surgery for diverticular disease coincided with fewer complications and a shorter length-of-stay. These trends mirror outcomes reported in non-veterans. Published by Elsevier Inc.

Walters, Jarvis W. DO; Phillips, Joshua K. MD; Brody, Fredrick J. MD, FACS; Duncan, James E. MD, FACS Author Information

BACKGROUND: During the past decade of conflict, numerous patients with combat-associated injuries required the formation of an ostomy. However, outcomes in those patients undergoing ostomy reversal have yet to be analyzed. We review the experience and identify risk factors for complications after ostomy reversal in a series of patients with combat injuries at our military treatment facility. STUDY DESIGN: A retrospective review of patients with combat-associated injuries managed with a diverting ostomy who underwent ostomy reversal at our military treatment facility during a 13-year period. Demographic and clinical data were collected for all patients and postoperative complications were identified. Multivariate analysis was performed to identify independent risk factors for complications after reversal. Complication rates were calculated for 90-day periods of time after ostomy creation and best-fit curve analysis was conducted. RESULTS: Ninety-nine patients were identified who underwent ostomy reversal. Forty patients (40.4%) suffered a post-reversal complication. On multivariate analysis, older age (odds ratio 1.11/y; p = 0.038), severe perineal injury indication for diversion (odds ratio 4.37; p = 0.028), and increased time interval between ostomy creation and reversal (odds ratio 1.005/d; p = 0.037), were independently associated with postoperative complications. A cubic regression best fit quarterly complication rate data (R-2 0.526; p < 0.001) and calculates a minimum complication rate for reversal 90 to 180 days after ostomy creation. CONCLUSIONS: Ostomy reversal in patients wounded in combat is a major undertaking with a high complication rate. The finding of a shorter interval from ostomy creation to reversal independently associated with a reduction in complications provides a modifiable risk factor to guide future practice and potentially reduce complications. Our modeling suggests reversal in the 3- to 6-month time frame can have the lowest rate of complications. Future research to reduce complications is indicated, especially in older patients with perineal wounds. (C) 2018 by the American College of Surgeons. Published by Elsevier Inc. All rights reserved.

Introduction The role for diverting ostomy as a method to help reduce morbidity and mortality has been well established in the combat trauma population. However, factors that influence the type of ostomy used and which ostomies become permanent are poorly studied. We examine patterns of ostomy usage and reversal in a large series of combat trauma patients. Methods We performed a retrospective review of combat casualties treated at our continental U.S. military treatment facility from 2003 to 2015. All patients who underwent ostomy formation were included. Clinical and demographic factors were collected for all patients including the type of ostomy and whether or not ostomy reversal took place. Patients were grouped and analyzed based on ostomy type and by ostomy reversal. Results We identified 202 patients who had ostomies created. End colostomies were most common ( N = 149) followed by loop colostomies ( N = 34) and end ileostomies ( N = 19). Casualties that underwent damage control laparotomy (DCL) were less likely to have a loop colostomy created ( p < 0.001). Ostomy reversal occurred in 89.9% of patients. There was no difference in ostomy reversal rates by ostomy type ( p = 0.080). Presence of a pelvic fracture was associated with permanent ostomy (OR = 3.28, p = 0.019), but no factor independently predicted a permanent ostomy on multivariate analysis. Discussion DCL and a severe perineal injury most strongly influence ostomy type selection. Most patients undergo colostomy reversal, and no factor independently predicted an ostomy being permanent. These findings provide a framework for understanding the issue of fecal diversion in the combat trauma population and inform military surgeons about injury patterns and treatment options.

In 2015, the United States Navy hospital ship (USNS) COMFORT, deployed to 11 Caribbean and Latin American countries over a six-month period to provide humanitarian civic assistance. Personnel from the United States Navy and multiple nongovernmental organizations collaborated to offer surgical and medical care. Data from past deployments aid in planning for future missions by prioritizing finite resources and maximizing care. The data analyzed included all patients evaluated and treated by the Directorate of Surgical Services of the USNS COMFORT between April and September 2015. Comparative and descriptive statistics were performed to analyze patient demographics, surgical subspecialty performing the procedures, types of general and pediatric surgical procedures performed, operative times, and complication rates. Of the 1256 surgical cases performed aboard USNS COMFORT during CP15, 24.8 per cent were general surgery cases, followed by 16 per cent ophthalmology, 10.6 per cent pediatric surgery, 10 per cent plastic surgery, and eight additional specialties with <10 per cent of the cases each. Total operative time was 1253 hours with a total room time of 1896.5 hours. The identified complication rate was 1.99 per cent across all specialties. The USNS COMFORT platform offers the unique capability to provide humanitarian surgical assistance. Reporting these data demonstrate that there is a need for humanitarian assistance and this can be provided safely through the Continuing Promise mission. Future deployments may target resources toward the surgical services with higher volumes, which were general surgery, ophthalmology, pediatric surgery, and plastic surgery.

The past three decades have witnessed a remarkable evolution of minimally invasive approaches to colon and rectal surgery. The present state of our surgical “know-how” and technology offers an exciting time for surgeons, adapting and applying new techniques in an ongoing quest for better and safer outcomes for our patients. Future applications of emerging, improving technologies—some in development, others yet to be designed—in the hands of creative, innovative surgeons promise a new frontier in our approaches to surgery for colorectal diseases. The articles contained within this issue offer both a comprehensive review of minimally invasive surgery (MIS) as it applies to colorectal surgery and a glimpse of new and emerging MIS approaches that further the pursuit of advancing surgery while minimizing the impacts on our patients. I am thankful for the opportunity provided to edit this issue for Clinics in Colon and Rectal Surgery, and I am likewise extremely grateful for the generous, knowledgeable contributions of the authors. I am fortunate and proud to have such talented colleagues willing to volunteer their expertise by composing timely, informative articles spanning the spectrum of minimally invasive colorectal surgery. I found each article to be both a concise and authoritative topical summary, and I hope that readers will find these contents useful and informative as I do. In contemplating the arc of MIS approaches in our field over time, it is indeed remarkable to reflect upon the past, understand the present, and imagine what the future may hold. James E. Duncan, MD, FACS, FASCRS

INTRODUCTION:Penetrating injuries to the pelvis and perineum can result in fistulas between the rectum and lower urinary tract. These injuries are often complicated, which creates challenges for successful repair. Operative strategies may include initial fecal and/or urinary diversion combined with an eventual trans-perineal, trans-anal, or posterior/transrectal approach, but the selected approach should be guided by precise anatomic localization of the injury. We aim to discuss different possible repair strategies as well as the relevant data surrounding gastrointestinal-genitourinary (GI-GU) fistula management.MATERIALS AND METHODS:We present this series of three post-traumatic rectovesical and rectourethral fistulas to illustrate the surgical options for treatment of these conditions. In this series, we have retrospectively reviewed our experience at Walter Reed National Military Medical Center in caring for three Wounded Warriors who had suffered these types of injuries. The study was exempt from institutional review board approval because of the size of the series.RESULTS:Our three patients all were managed with initial urinary and fecal diversion before an eventual trans-perineal, trans-anal, or posterior/transrectal approach. All three patients ultimately underwent reversal of diverting ostomies with good functional results and successful resolution of their GI-GU fistulas.CONCLUSIONS:This series demonstrates the complexity of traumatic GI-GU fistulas. Successful management depended on early diversion of both urine and feces, localization of the fistula, and an interdisciplinary surgical approach specifically tailored to each patient. All three patients had favorable overall functional outcomes despite their devastating injuries. This review should help to illustrate some of the possible repair strategies for these difficult surgical problems.

1Walter Reed National Military Medical Center, Bethesda, Maryland, USA 2Uniformed Services University of Health Services, Bethesda, Maryland, USA

Quality improvement in health care has become a major topic of discussion among health care providers, patients, insurance companies, and the government. National Surgical Quality Improvement Project (NSQIP), along with a multitude of other programs, exists in an attempt to create objective data that can be used to compare hospitals and providers against a national average. Studies have shown that despite good patient care and proper surgical technique, patients who undergo procedures such as colectomy have a higher incidence of surgical site infection (SSI) and other morbidities. Therefore, hospitals with a large volume of colon and rectal surgery cases are routinely identified as "high outliers" in these quality improvement programs. Programs, such as NSQIP, may not be the best way to measure quality in specific subspecialties such as colon and rectal surgery.

BACKGROUND:Traumatic injuries to the lower gastrointestinal tract occur in up to 15% of all injured combatants, with significant morbidity (up to 75%) and mortality. The incidence, etiology, associated injuries, and overall mortality related to modern battlefield colorectal trauma are poorly characterized.METHODS:Using data from the Joint Theater Trauma Registry and other Department of Defense electronic health records, the ongoing Joint Surgical Transcolonic Injury or Ostomy Multi-theater Assessment project quantifies epidemiologic trends in colon injury, risk factors for prolonged or perhaps unnecessary fecal diversion, and quality of life in US military personnel requiring colostomies. In the current study, all coalition troops with colon or rectal injuries as classified by DRG International Classification of Diseases-9th Rev. diagnosis and Abbreviated Injury Scale (AIS) codes in the Joint Theater Trauma Registry were included.RESULTS:During 8 years, 977 coalition military personnel with colorectal injury were identified, with a mean (SD) Injury Severity Score (ISS) of 22.2 (13.2). Gunshot wounds remain the primary mechanism of injury (57.6%). Compared with personnel with colon injuries, those with rectal trauma sustained greater injury to face and extremities but fewer severe thoracic and abdominal injuries (p < 0.005). Overall fecal diversion rates were significantly higher in Iraq than in Afghanistan (38.7% vs. 31.6%, respectively; p = 0.03), predominantly owing to greater use of diversion for colon trauma. There was little difference in diversion rates between theaters for rectal injuries (59.6% vs. 50%, p < 0.15). The overall mortality rate was 8.2%. Notably, the mortality rate for patients with no fecal diversion (10.8%) was significantly greater than those with fecal diversion (3.7%, p < 0.0001).CONCLUSION:Military personnel sustaining colon or rectal trauma continue to have elevated mortality rates, even after reaching surgical treatment facilities. Furthermore, associated serious injuries are commonly encountered. Fecal diversion in these patients may lead to reduced mortality, although prospective selection criteria for diversion do not currently exist. Future research into risk factors for colostomy creation, timing of diversion in relation to damage-control laparotomy, and quality of life in veterans with stomas will produce useful insights and help guide therapy.LEVEL OF EVIDENCE:Epidemiologic study, level III.

Computed Tomography Colonography (CTC) is an accepted option for colorectal cancer screening. Benefits of CTC over optical colonoscopy (OC) include less invasion and risk, no need for sedation, and identification of extracolonic pathology. The major benefit of OC over CTC is the ability to remove polyps or obtain tissue from detected abnormalities for therapy and/or histologic diagnosis. Both procedures require mechanical bowel preparation. An ideal, efficient CTC screening program would offer same-day OC should findings dictate in order to avoid repeat bowel preparation. We sought to identify from our institutional experience: 1) the expected number of patients that would require OC based upon their screening CTC, and 2) the expected duration of time to complete both procedures in a same-day, outpatient setting. This important data will allow for resource allocation and endoscopy staffing to craft and support an efficient CTC screening model. CTC colorectal cancer screening has been operational at National Naval Medical Center since July 2004. We reviewed data from an existing QA database on all CTC performed at our institution for the calendar years 2004-2010. Using a sample population, we identified the number of patients that were recommended to undergo OC based on established criteria for an abnormal CTC. In addition, for those patients that underwent same-day OC, the amount of time that transpired from arrival for CTC until the discharge after OC was calculated. The typical process events that occurred during the patient's wait time were identified. During the time period of July 2004 - November 2010, 10,152 CTC's were performed, of which 1,137 OC were required (11%). There were a total of 130 CTC where same-day OC was performed and complete data regarding timing of each procedure was available. The average wait time from arrival for CTC to discharge after OC was 348 minutes (Range 178 - 684, SD 100, Median 333). Identified process events that occur during the patient wait time included patient time (arrival, check-in, dressing), radiologist CTC interpretation time, endoscopy unit registration time, OC preparation and completion time, and discharge time following OC recovery. Implementation of an efficient colorectal cancer screening based on CTC requires coordination of several key processes and availability of same-day optical colonoscopy. Based upon our established colorectal cancer screening program using this model, more than 1 out of every 10 patients would benefit from same-day OC. Patients can be counseled that they can expect to wait, on average, 5.8 hours until completion of both screening procedures. Further study of this model will identify areas for intervention to further streamline the process, shorten wait times, and create an efficient delivery system.

Pilonidal disease is a common condition, ranging from the routine cyst with abscess to extensive chronic infection and sinus formation. It can be associated with significant morbidity and prolonged wound healing after definitive surgery. This article reviews the history and pathogenesis of this often challenging surgical problem and the numerous nonoperative and operative treatment options currently available for it.

Background: Inguinal hernia is a common surgical problem in the active duty population. The decision to perform a hernia repair in the traditional open manner versus a laparoscopic approach is somewhat controversial. Furthermore, the type of repair performed has not been analyzed in a systematic manner within an operational setting. Methods: We retrospectively reviewed all inguinal hernia repairs performed at Expeditionary Medical Facility Kuwait (EMFK) over an 18-month period, from April 2007 through October 2008. Operative times and time to return to duty were compared between active duty personnel undergoing open mesh repair and laparoscopic extraperitoneal inguinal hernia repair. Results: One hundred seventy-six consecutive patients who underwent inguinal hernia repair by six different surgeons were analyzed. One hundred and four patients had an open repair and 72 patients underwent laparoscopic repair. The mean operative time was significantly longer in the laparoscopic group (20.2 minutes, p < 0.001). The mean time to return to duty was significantly shorter in the laparoscopic group (2.3 days, p = 0.008). Conclusions: Laparoscopic inguinal hernia repair is associated with longer operative times but shorter recovery periods. The laparoscopic approach may be a viable option for patients in the expeditionary setting.

Despite emerging evidence from randomized controlled trials and meta-analyses questioning its use, mechanical bowel preparation (MBP) continues to hold an accepted place among surgeons. MBP has been administered to patients for over a century, and though the methods and agents used for intestinal cleansing have evolved over time, many surgeons still embrace MBP as a necessary, essential regimen. The accepted rationale for MBP includes evacuation of stool to allow visualization of the luminal surfaces as well as to reduce the fecal flora, which is believed to translate into lower risk of infectious and anastomotic complications at surgery. The authors describe the history of MBP as it relates to colorectal surgery and review the agents currently used for mechanical bowel preparation. Additionally, they summarize the recent trials, meta-analyses, and other emerging data from the medical literature that suggest MBP offers no benefit as a preoperative measure and question its place in current surgical practice.

OBJECTIVE. The purpose of this study was to determine the discrepancy between CT colonography (CTC) and optical colonoscopy (OC) measurements for both anus-to-cecum length and anus-to-polyps distance and then determine whether a conversion factor could be generated to equate these CTC and OC distances.MATERIALS AND METHODS. We retrospectively reviewed CTC and OC reports from patients who had undergone both procedures as part of an established protocol. The anus-to-cecum measurement recorded on a single proprietary CTC workstation was compared with the OC cecal length for each patient. Likewise, anus-to-polyp distances were compared as measured by the radiologist and endoscopist.RESULTS. Three hundred thirty-eight patients and 437 polyps were identified with complete data from both CTC and same-day OC. The average anus-to-cecum distance measured at CTC was 189 cm (range, 75-257 cm) and at OC, 108 cm (range, 65-150 cm). For polyps proximal to the splenic flexure (n = 145), the CTC anus-to-polyp measurement was on average 1.7 times that measured at OC. For left-sided polyps (n = 292), the CTC measurement was, on average, within 12 cm or 1.3 times that of the OC anus-to-polyp measurement. All the differences between CTC and OC measurements of cecal length and polyp distances were found to be statistically significant using a paired Student's t test of means (p < 0.001).CONCLUSION. Anus-to-cecum and anus-to-polyp distances are disparate but comparable using a conversion factor of 0.57 for the CTC anus-to-cecum measurement and 0.59 for right-sided CTC anus-to-polyp or 0.78 for left-sided CTC anus-to-polyp measurements. These anus-to-polyp conversion factors could potentially augment current CTC guidelines for accurate and precise polyp localization and removal at endoscopy.