Examining the transferability of colon and rectal operative experience on outcomes following laparoscopic rectal surgery.

BACKGROUND: Laparoscopic rectal surgery is technically challenging and often low volume. Alternatively, colon resections utilize similar advanced laparoscopic skills and are more common but it is unknown whether this experience affects laparoscopic rectal surgery outcomes. The purpose of this paper is to determine the volume-outcome relationship between several colorectal procedures and laparoscopic rectal surgery outcomes. METHODS: This was a population-based retrospective cohort of all colorectal surgeries with primary anastomoses performed across Canada (excluding Quebec) between April 2008 and March 2015. Patient characteristics, comorbidities, procedures, and discharge details were collected from the Canadian Institute for Health Information. Volumes for common colorectal procedures were calculated for individual surgeons. All-cause morbidity, defined as complications arising during the index admission and contributing to an increased length of stay by more than 24 h, was the primary outcome examined. RESULTS: A total of 5323 laparoscopic rectal surgery cases and 108,034 colorectal cases, between 180 hospitals and 620 surgeons, were identified. Data analysis demonstrated that high-volume laparoscopic rectal surgeons (OR 0.77, CI 0.61-0.96, p = 0.020) and high-volume open rectal surgeons (OR 0.76, CI 0.61-0.93, p = 0.009) significantly reduced all-cause morbidity. Conversely, surgeon volumes for laparoscopic and open colon cases had no effect on laparoscopic rectal outcomes. CONCLUSION: High-volume surgeon status in laparoscopic and open rectal surgery are important predictors of all-cause morbidity after laparoscopic rectal surgery, while laparoscopic colon surgery volumes did not impact outcomes. This may reflect more dissimilarity between colon and rectal cases and less transferability of advanced laparoscopic skills than previously thought.

Drivers of Inpatient Costs After Colorectal Surgery Within a Publicly Funded Healthcare System.

BACKGROUND: The morbidity and mortality associated with colorectal resections are responsible for significant healthcare use. Identification of efficiencies is vital for decreasing healthcare cost in a resource-limited system. OBJECTIVE: The purpose of this study was to characterize the short-term cost associated with all colon and rectal resections. DESIGN: This was a population-based, retrospective administrative analysis. SETTINGS: This analysis was composed of all colon and rectal resections with anastomosis in Canada (excluding Quebec) between 2008 and 2015. PATIENTS: A total of 108,304 patients ≥18 years of age who underwent colon and/or rectal resections with anastomosis were included. MAIN OUTCOME MEASURES: Total short-term inpatient cost for the index admission and the incremental cost of each comorbidity and complication (in 2014 Canadian dollars) were measured. Cost predictors were modeled using hierarchical linear regression and Monte Carlo Markov Chain estimation. RESULTS: Multivariable regression demonstrated that the adjusted average cost of a 50-year-old man undergoing open colon resection for benign disease with no comorbidities or complications was $9270 ((95% CI, $7146-$11,624; p = <0.001). With adjustment for complications, laparoscopic colon resections carried a cost savings of $1390 (95% CI, $1682-$1099; p = <0.001) compared with open resections. Surgical complications were the main driver for increased cost, because anastomotic leaks added $9129 (95% CI, $8583-$9670; p = <0.001). Medical complications such as renal failure requiring dialysis ($16,939 (95% CI, $15,548-$18,314); p = <0.001) carried significant cost. Complications requiring reoperation cost $16,313 (95% CI, $15,739-$16,886; p = <0.001). The costliest complication cumulatively was reoperation, which exceeded $95 million dollars over the course of the study. LIMITATIONS: Inherent biases associated with administrative databases limited this study. CONCLUSIONS: Medical and surgical complications (especially those requiring reoperation) are major drivers of increased resource use. Laparoscopic colorectal resection with or without adjustment for complications carries a clear cost advantage. There is opportunity for considerable cost savings by reducing specific complications or by preoperatively optimizing select patients susceptible to costly complication. See Video Abstract at http://links.lww.com/DCR/A839.

Geographic variation in the provider of screening colonoscopy in Canada: a population-based cohort study.

BACKGROUND: Screening colonoscopy for the detection of colorectal carcinoma is provided by several specialties. Few studies have assessed geographic variation in the delivery of this care. Our objective was to investigate how geographic and socioeconomic factors affect who provides screening colonoscopy in Canada. METHODS: This was a population-based cohort of all screening colonoscopy procedures performed at publicly funded Canadian health care facilities (excluding those in Quebec) between April 2008 and March 2015. The main outcome of interest was the proportion of colonoscopy procedures performed by surgeons versus gastroenterologists at the neighbourhood level. Predictors of interest included socioeconomic and geographic variables. We used spatial analysis to evaluate significant clustering of practitioner services and multinomial logistic regression to model predictors. RESULTS: We identified 658 113 screening colonoscopy procedures performed by 1886 providers (1169 surgeons and 717 gastroenterologists) over the study period, of which 353 165 (53.7%) were performed by surgeons. A total of 24.2% of neighbourhoods were located within clusters predominantly served by gastroenterologists, and 19.5% were within surgeon clusters; the remainder were in mixed clusters. Rural neighbourhoods had a significantly increased relative risk of being within a surgeon cluster (relative risk [RR] 5.38, 95% confidence interval [CI] 3.48-8.01) compared to mixed clusters and nearly 100 times higher relative risk of being in a surgeon cluster compared to gastroenterologist clusters (RR 98.95, 95% CI 15.3-427.2). Neighbourhoods with the highest socioeconomic status were 1.74 (95% CI 1.14-2.56) times likelier to be in gastroenterologist clusters than in mixed clusters. INTERPRETATION: Surgeons provide a large proportion of colonoscopy procedures in Canada and are essential for access to care, particularly in rural regions. Most Canadians are served relatively equally by surgeons and gastroenterologists. This emphasizes the importance of both specialties to the delivery of colonoscopy care across the country.

Neighborhood Variation in the Utilization of Laparoscopy for the Treatment of Colon Cancer.

BACKGROUND: The rates of laparoscopic colectomy for colon cancer have steadily increased since its inception. Laparoscopic colectomy currently accounts for a third of colectomy procedures in the United States, but little is known regarding the spatial pattern of the utilization of laparoscopy for colon cancer. OBJECTIVE: This study evaluated the utilization of laparoscopy for colon cancer at the neighborhood level in Ontario. DESIGN: Retrospective analysis of prospectively collected data was performed. SETTING: This study was conducted at all hospitals in the province of Ontario. PATIENTS: This population-based study included all patients aged ≥18 who received an elective colectomy for colon cancer from April 2008 until March 2012 in the province of Ontario. MAIN OUTCOME MEASURES: The primary outcome measure was the neighborhood rates of laparoscopy. RESULTS: Overall, 9,969 patients underwent surgery, and the cluster analysis identified 74 cold-spot neighborhoods, representing 1.8 million people, or 14% of the population. In the multivariate analysis, patients from rural neighborhoods were less than half as likely to receive laparoscopy, OR 0.44 (95% CI, 0.24-0.84; p = 0.012). Additionally, having a minimally invasive surgery fellowship training facility within the same administrative health region as the neighborhood made it more than 23 times as likely to be a hot spot, OR 25.88 (95% CI, 12.15-55.11; p < 0.001). Neighborhood socioeconomic status was not associated with variation in the utilization of laparoscopy. LIMITATIONS: Patient case mix could affect laparoscopy use. CONCLUSION AND RELEVANCE: This study identified an unequal utilization of laparoscopy for colon cancer within Ontario with rural neighborhoods experiencing low rates of laparoscopic colectomy, whereas neighborhoods in the same administrative region as minimally invasive surgery training centers experienced increased utilization. Further study into the causes of this variation in resource allocation is needed to identify ways to improve more efficient spread of knowledge and technical skills advancement.

A comparison of 30-day versus 90-day proton pump inhibitor therapy in prevention of marginal ulcers after laparoscopic Roux-en-Y gastric bypass.

BACKGROUND: Marginal ulceration is one of the most common complications after laparoscopic Roux-en-Y gastric bypass (LRYGB) surgery. Proton pump inhibitors (PPIs) are commonly administered to decrease the incidence of marginal ulcer development. OBJECTIVE: We examine the differential impact of employing a 30-day versus 90-day postoperative PPI regimen on the development of marginal ulceration after LRYGB. SETTING: University hospital. METHODS: A retrospective cohort design was used to study all patients undergoing LRYGB at a single, high-volume bariatric center in Hamilton, Ontario, Canada. Three years previously, the duration of postoperative PPI administration was increased at our center from 30 to 90 days. Diagnosis of marginal ulceration was confirmed by upper endoscopy in patients presenting with epigastric pain and a clinical history suggestive of marginal ulceration. A χ(2) test of independence was performed to examine incidence of marginal ulceration and PPI duration. RESULTS: A total of 1016 patients underwent LRYGB at our center between January 2009 and January 2013. No differences in baseline characteristics were observed between groups. Of the 1016 patients followed, 614 received 30 days of PPI therapy and 402 received 90 days of PPI therapy. The incidence of marginal ulceration after LRYGB decreased significantly (P<.05) among patients receiving daily PPI for 90 days (n = 26, 6.5%) compared with those receiving PPI for 30 days (n = 76, 12.4%). CONCLUSION: This study suggests a significant benefit to longer duration prophylactic PPI administration after gastric bypass surgery to minimize the risk of symptomatic marginal ulceration.

Early clinical experience with the POEM procedure for achalasia.

BACKGROUND: Per oral endoscopic myotomy (POEM) is a viable alternative to standard Heller myotomy for surgical treatment of achalasia. Outcomes from the United States, Europe and Asia have been reported. We sought to report data after the initiation of POEM in a Canadian centre. METHODS: We enrolled patients with achalasia in a research ethics board-approved pilot study. Surgeons learned the POEM procedure in a systematic manner that included visiting experts in POEM, practice in an animal laboratory and mentoring from POEM experts. Preoperative evaluation included manometry, 24-hour pH, barium swallow, endoscopy and Eckhardt Symptom Score. All patients underwent gastrograffin swallow on postoperative day 1. Patients were re-evaluated using the Eckhardt score on postoperative day 14. RESULTS: Ten patients underwent POEM. Seven patients had previous endoscopic treatments: 6 had balloon dilatation and 1 had botulinum toxin injection. Mean preoperative Eckhardt score was 8.1 ± 2.4. Mean preoperative lower esophageal sphincter resting and residual pressure was 32.3 ± 9.2 and 20.8 ± 5.3, respectively. Mean duration of surgery was 141.3 ± 43.7 minutes. Mean length of hospital stay was 1 day. No major perioperative complications occurred. On postoperative day 14, the mean Eckhardt score was 1 ± 1.2. CONCLUSION: Our approach to POEM introduction was systematic and deliberate. The procedure is safe, feasible and has good perioperative outcomes. Our early results are consistent with current literature.

CONTEXTE: La myotomie perorale endoscopique (POEM) est une solution de rechange viable à la myotomie de Heller standard pour le traitement chirurgical de l'achalasie. Des rapports ont fait état de résultats enregistrés aux États-Unis, en Europe et en Asie. Nous avons voulu faire le point après l'instauration de la méthode POEM dans un centre canadien. MÉTHODES: Nous avons inscrit des patients atteints d'achalasie à une étude de recherche pilote, approuvée par le comité d'éthique. Les chirurgiens se sont initiés à la technique POEM de façon systématique auprès d'experts de cette technique, en s'exerçant sur des animaux de laboratoire et ensuite auprès d'experts-mentors. L'examen préopératoire incluait : manométrie, pH des 24 heures, repas baryté, endoscopie et score d'Eckardt (pour les symptômes). Tous les patients ont subi un transit du grêle avec Gastrografin au jour 1 postopératoire. Le score d'Eckardt des patients a été réévalué au jour 14 postopératoire. RÉSULTATS: Dix patients ont subi la technique POEM. Sept avaient déjà reçu des traitements endoscopiques : 6 avaient subi une dilatation par ballonnet et 1 avait reçu une injection de toxine botulique. Le score d'Eckardt préopératoire moyen était de 8,1 ± 2,4. La pression préopératoire moyenne du sphincter oesophagien inférieur au repos et résiduelle était de 32,3 ± 9,2 et de 20,8 ± 5,3, respectivement. La durée moyenne de la chirurgie a été de 141,3 ± 43,7 minutes. La durée moyenne du séjour hospitalier a été d'un jour. Aucune complication périopératoire majeure n'est survenue. Au jour 14 postopératoire, le score d'Eckardt moyen était de 1 ± 1,2. CONCLUSION: Notre approche à l'instauration de la technique POEM a été systématique et délibérée. L'intervention s'est révélée sécuritaire, réalisable et a procuré des résultats périopératoires positifs. Nos résultats préliminaires concordent avec ceux de la littérature actuelle.

An Internet-Based Collaborative Cancer Conference for Rectal Cancer Influenced Surgeon Treatment Recommendations.

INTRODUCTION: In many jurisdictions geographic and resource constraints are barriers to multidisciplinary cancer conference review of all patients undergoing cancer surgery. We piloted an internet-based collaborative cancer conference (I-CCC) for rectal cancer to overcome these barriers in the LHIN4 region of Ontario (population 1.4 million). METHODS: Surgeons practicing at one of 10 LHIN4 hospitals were invited to participate in I-CCC reviews. A secure internet audio and visual link facilitated review of cross-sectional images and case details. Before review, referring surgeons detailed initial treatment plans. Main treatment options included preoperative radiation, straight to surgery, and plan uncertain. Changes were noted following I-CCC review from initial to final treatment plan. Major changes included: redirect patient to preoperative radiation from straight to surgery or plan uncertain; and redirect patient to straight to surgery from preoperative radiation or plan uncertain. Minor changes included: change type of neoadjuvant therapy; request additional tests (e.g., pelvic MRI); or formal MCC review. RESULTS: From November 2010 to May 2012, 20 surgeons (7 academic and 13 community) submitted 57 rectal cancer cases for I-CCC review. After I-CCC review, 30 of 57 (53 %) cases had treatment plan changes: 17 major and 13 minor. No patient or tumour factors predicted for treatment plan change. CONCLUSIONS: An I-CCC for rectal cancer in a large geographic region was feasible and influenced surgeon treatment recommendations in 53 % of cases. Because no factor predicted for treatment plan change, it is likely prudent that all rectal cancer patients undergo some form of collaborative review.

Quality improvement in colorectal cancer in local health integration network 4 (LHIN 4) project (QICC-L4): integrated knowledge translation in a large geographic region.

BACKGROUND: Stakeholders suggest that integrating end users into the planning and execution of quality improvement interventions may more effectively close quality gaps. We tested if such an approach could improve the quality of colorectal cancer surgery in a large geographic region (i.e., LHIN4) in Ontario, Canada. METHODS: All LHIN4 surgeons who provide colorectal cancer surgery were invited to an October 2006 inaugural QICC-L4 workshop and subsequent workshops in 2008, 2010, and 2012. At workshops, surgeons selected clinically relevant quality markers for targeted improvement and interventions to achieve improvements. Selected markers included rates of colon and rectal radiology imaging, rate of pathology reporting of rectal radial margin distance, and rate of positive rectal radial margins. To date, implemented interventions have included audit and feedback, tailoring interviews to identify barriers and facilitators to optimal quality, and preoperative internet-based patient reviews. Hospital and regional cancer centre charts provide audit data for annual feedback reports to surgeons. RESULTS: Participating surgeons at workshops and surgeon participants in preoperative reviews treated approximately 70 % of all LHIN4 patients undergoing colorectal surgery. For years 2006-2012, the rate of radiology imaging for colon and rectal cases increased from 70 to 91 % and from 71 to 91 %, respectively. For rectal cases, the rate of reporting radial margins increased (55-93 %), and the rate of positive radial margins decreased (14-6 %). CONCLUSIONS: Initiation of the integrated knowledge translation QICC-L4 project in a large geographic region was associated with marked improvements in relevant colorectal cancer surgery quality markers.

Uptake and patient outcomes of laparoscopic colon and rectal cancer surgery in a publicly funded system and following financial incentives.

PURPOSE: To assess patterns of uptake and outcomes of laparoscopic colon and rectal cancer surgery in Ontario, and the potential influence of surgical fee incentives instituted on October 1, 2005. METHODS: We used Ontario administrative databases from fiscal years 2002 to 2009. Study outcomes were uptake rates of laparoscopic surgery, hospital length of stay, 30-day operative mortality, cancer-specific survival, and overall survival. The main descriptor for multivariable regression models was a 5% increase in rate of laparoscopic colon cancer surgery in the previous year. RESULTS: The annual rate of laparoscopic colon and rectal cancer surgery, respectively, rose from 8.7 to 38.9% and from 4.8 to 19.6%. The greatest increase in rate of laparoscopic colon surgery occurred shortly after October 1, 2005. For each 5% increase in rate of laparoscopic surgery, the odds of 30-day mortality was 1.0 [95% confidence interval (CI) 0.96-1.01, p = 0.264], the hazard of cancer-specific survival was 1.0 (95% CI 0.97-1.00, p = 0.139), the hazard of overall survival was 1.0 (95% CI 0.98-1.00, p = 0.051), and length of hospital stay was lower (estimate = -0.10, 95% CI -0.14 to -0.06, p < 0.001). CONCLUSIONS: In Ontario by the year 2009, 39% of colon and 20% of rectal cancer surgery was provided laparoscopically. Increased rates were associated with a minimal decrease in hospital length of stay and no changes in 30-day mortality, cancer-specific survival, or overall survival. Financial incentives were likely responsible for the marked increase in laparoscopic colon cancer surgery observed after October 1, 2005.

Midterm outcomes of laparoscopic surgery for rectal cancer.

In this study, the authors examine midterm survival and recurrence after laparoscopic and open surgery for rectal cancer. This is a retrospective review of a prospective database for rectal cancer surgeries performed at the authors' institution, with follow-up data obtained through chart review. In all, 74 patients in this study had open surgery, and 93 had laparoscopic surgery. The 5-year overall survival was 73.6% ± 12.0% in the open group and 80.0% ± 12.8% in the laparoscopic group (P = .159). Disease-free survival at 5 years was better in the laparoscopic group (71.0% ± 13.4%) than in the open group (50.3% ± 12.7%), with a P value of .01. Laparoscopic surgery remained an independent predictor of disease-free survival in the multivariate analysis. Results of prospective randomized trials are awaited, and the authors expect that the laparoscopic approach will be shown to be a safe and effective option for the management of rectal cancer.

A hinged metalloplastic anastomotic device: a novel method for choledochoduodenostomy.

BACKGROUND: In biliary obstruction, the creation of a large-diameter permanent fistula between the bile duct and the duodenum would be attractive. OBJECTIVE: To invent, prototype, and test a new method of forming a biliary duodenal anastomosis. DESIGN: Survival and nonsurvival porcine model. SETTING: An animal laboratory with general anesthesia. INTERVENTION: A novel hybrid metalloplastic 7F anastomosis device that consisted of a central ferrous metallic tube sandwiched between 2 tapered flexible plastic end pieces was used. The device was hinged on either side of the metal insert so that a magnetic force could form an anastomosis and then the plastic components of the device could deform to fall through the compression anastomosis. These devices were inserted into the bile duct of the pigs over a 0.035-inch guidewire with a pusher tube. Cylindrical-shaped magnets were then positioned over the intraduodenal bile duct so that they exerted compressive ischemic force on the duodenum and bile duct above the papilla. MAIN OUTCOME MEASUREMENTS: Choledochoduodenal anastomoses created were inspected at subsequent endoscopy and postmortem for patency and size. RESULTS: Seven anastomosis devices were placed in the bile duct of pigs (weight 22-54 kg). All 4 survival animals were well and eating as soon as they were awake. Anastomoses were successfully accomplished in all survival animals. The supra-ampullary opening into the bile duct ranged from 5 to 10 mm. LIMITATION: The small number of animals. CONCLUSIONS: A new method for achieving larger-diameter biliary drainage was developed. Four animals were euthanized after 2 to 7 days. Our best anastomosis resulted from 2 magnets left in the animals for 4 days.

Laparoscopic surgery for colon cancer: a systematic review.

INTRODUCTION: Colorectal cancer is the second leading cause of cancer-related death in western countries. The objective of this systematic review was to show that laparoscopic-assisted colon resection for cancer is not inferior to open colectomy with respect to cancer survival and perioperative outcomes. METHOD: We performed a comprehensive literature review. Inclusion criteria were adults aged over 16 years with a colon resection for documented colon cancer and randomized controlled trials with laparoscopic- assisted or open resections. We excluded studies that did not document colon cancer recurrence in their article. We assessed data extraction and study quality and performed a quantitative data analysis. RESULTS: Six published and 4 unpublished studies fulfilled our inclusion criteria, with a total of 1262 patients. All primary and secondary outcomes showed good homogeneity, except for morbidity, which was described heterogeneously between the studies. There was no disadvantage to laparoscopic colon resection in any of these primary and secondary outcomes, compared with the conventional open technique. CONCLUSION: The results of this study suggest that, although there is no definitive answer, present evidence indicates that laparoscopic colon cancer resection is as safe and efficacious as the conventional open technique.

Management of spleen injuries in the adult trauma population: a ten-year experience.

BACKGROUND: Increasing awareness of the postoperative risks associated with splenectomies has led physicians and surgeons to use an alternative nonoperative strategy in handling traumatic spleen injuries. Our primary objective was to compare clinical outcomes between operative and nonoperative managements in adult patients with blunt splenic injuries. The secondary objective was to assess the changes in the patterns of managing splenic injuries in the past 10 years. METHODS: We performed a retrospective chart review on 266 adult patients with a spleen injury who were admitted to a tertiary trauma centre in Ontario between 1992 and 2001. We grouped and compared the patients according to the treatment received, either operative or nonoperative. Frequencies and confidence intervals are reported. Categorical variables were compared with chi-square or Fisher's exact tests. Continuous variables were reported as median and quartile (Q) and were compared with the nonparametric Mann-Whitney U test. RESULTS: Of 266 patients, 118 had surgery and 148 were managed nonoperatively. The mortality rate was similar between operative and nonoperative groups (9.3% v. 6.8%, p = 0.49), respectively. The rate of any complication was 47.9% for the operative group and 37.9% for the nonoperative group. The median length of stay in hospital was significantly higher in the operative group than in the nonoperative group (21.0 [Q 11.0-40.5] v. 14.0 [Q 7.0-31.5] d, p < 0.001), respectively. This difference was more likely related to a higher proportion of patients having injury severity scores greater than 25 in the operative group. The rate of nonoperative management of spleen injuries was significantly increased from 48.5% to 63.1% between 1992-1996 and 1997-2001 (p = 0.02). CONCLUSION: The present study has shown that nonoperative management of blunt spleen trauma has increased over time and has acceptable mortality and complication rates in selected patients. Additional prospective studies are needed to assess the feasibility and safety of nonoperative management in adult spleen injuries. Furthermore, the management of traumatic spleen injuries with respect to associated injuries, such as head injuries or intra-abdominal injuries, needs ongoing evaluation.

A minimally invasive approach to the treatment of aberrant splenic artery aneurysms: a report of two cases.

Symptomatic aneurysms of an aberrant splenic artery originating from the superior mesenteric artery are rare, with only five previous reports in the literature. The retropancreatic position renders their treatment more complex than aneurysms of orthotopic splenic arteries. Traditional treatment has been open surgical repair, with or without maintenance of flow through the splenic artery. We present our experience with two patients treated with a combination of coil embolization and laparoscopic occlusion of the splenic artery achieved by developing a retropancreatic plane and applying clips immediately distal to the aneurysm. This appears a promising minimally invasive technique to treat this rare condition. Long term follow up, however, is necessary to determine the applicability and results.

Minimally invasive adrenalectomy for pheochromocytoma during pregnancy.

Pheochromocytoma during pregnancy is a very rare condition; fewer than 200 cases have been reported in the literature. We present the case of a 24-year-old pregnant woman found to have a pheochromocytoma during investigation of abdominal pain. This is the second reported case of laparoscopic adrenalectomy for pheochromocytoma detected during pregnancy. After appropriate radiologic investigation and medical management, a laparoscopic left adrenalectomy was performed at the beginning of the second trimester. There were no complications, and she was delivered of a healthy baby at term. We review the management of pheochromocytoma in pregnant patients and discuss the role of laparoscopy.

Laparoscopic excision of urachal anomalies: a review.

Technological advancements have refined laparoscopic surgery and expanded its application to include many disease processes and organs. As next-generation instruments become smaller (<5 mm), secondary benefits such as cosmesis, patient satisfaction, and decreased postoperative analgesic requirements are being realized. Urachal anomalies are rare, and their management is evolving from total radical open, to needlescopic (