3D mesenteric angiogram-based assessment of Arc of Riolan crossing the inferior mesenteric vein: important considerations in high ligation during splenic flexure takedown in anterior resection.

BACKGROUND: Recent studies have described the finding of the Arc of Riolan (AoR) crossing the inferior mesenteric vein (IMV) seen during high ligation of IMV while performing minimally invasive colectomies. However, the AoR usually has a medial course, and this variant AoR anatomic course and the clinical importance of its preservation during splenic flexure takedown in anterior resection remains controversial. METHODS: After institutional approval (QA-5775), radiological identification of and mapping of the vessel horizontally crossing the IMV under the pancreas, when present, was performed at a single institution (Westmead Hospital, New South Wales, Australia). One hundred consecutive computed tomographic (CT) mesenteric angiograms conducted in 2018 were reviewed retrospectively to determine the presence of a vessel horizontally crossing the IMV. 3D reconstructions were used to map out its course to understand its origin and full course. Baseline characteristics, including demographic and comorbidity data, were obtained from the medical record. RESULTS: On 3D mesenteric angiogram reconstructions, a vessel crossing anterior to the IMV was present in 11 of 98 cases (11.2%). Two cases were excluded as the presence of this vessel was indeterminate. Eight of 11 patients (72.7%) were male, and the mean age was 49.3 years (range: 21-80 years). There was no statistically significant difference in age and comorbidities between the groups. Importantly, in all 11 cases, there was an arterial vessel crossing the IMV originating from the SMA and communicating with the IMA or a branch of the IMA, proving definitively that this vessel was by definition the AoR. CONCLUSION: This 3D mesenteric angiogram mapping study has shown definitively that the vessel horizontally crossing anterior to the IMV and inferior to the pancreas is an arterial vessel from the SMA to IMA, and by definition the Arc of Riolan. When present, identification and preservation of this collateral arterial vessel during splenic flexure takedown in anterior resection may be important in reducing the risk of post-operative bowel ischaemia.

The impact of variations in care and complications within a colorectal Enhanced Recovery After Surgery program on length of stay.

PURPOSE: Enhanced Recovery After Surgery (ERAS) has become standard of care in colorectal surgery. However, there is not a universally accepted colorectal ERAS protocol and significant variations in care exist between institutions. The aim of this study was to examine the impact of variations in ERAS interventions and complications on length of stay (LOS). METHODS: This study was a single-center review of the first 200 consecutive patients recruited into our prospectively collected ERAS database. The primary outcome of this study was to examine the rate of compliance to ERAS interventions and the impact of these interventions on LOS. The secondary outcome was to assess the impact of complications (anastomotic leak, ileus, and surgical site infections) on LOS. ERAS interventions, rate of adherence, LOS, readmissions, morbidity, and mortality were recorded, and statistical analysis was performed. RESULTS: ERAS variations and complications significantly influenced patient LOS on both univariate and multivariate analysis. ERAS interventions identified as the most important strategies in reducing LOS included laparoscopic surgery, mobilization twice daily postoperative day (POD) 0 to 1, discontinuation of intravenous fluids on POD 0 to 1, upgrading to solid diet by POD 0 to 2, removal of indwelling catheter by POD 0 to 2, avoiding nasogastric tube reinsertion and removing drains early. Both major and minor complications increased LOS. Anastomotic leak and ileus were associated with the greatest increase in LOS. CONCLUSION: Seven high-yield ERAS interventions reduced LOS. Major and minor complications increased LOS. Reducing variations in care and complications can improve outcomes following colorectal surgery.

Chyme reinfusion nutritional management for enterocutaneous fistula: first international application of a novel pump technique.

AIM: High-output enterocutaneous fistulas (ECFs) are an established cause of intestinal failure. Parenteral nutrition (PN) remains the gold standard for nutritional management but is complex, expensive and associated with significant complications. Chyme reinfusion (CR) has been reported by multiple centres as a viable option for nutritional management that improves nutritional status, provides the capacity to cease PN and is cost-effective. The aim of this paper is to describe the first use of a novel pump device (The Insides System™) by an independent centre in Australia for the nutritional management of a patient with high-output ECF. METHOD: CR was performed on a 66-year-old woman with a high-output ECF. The device consists of two main components: a centrifugal pump that sits inside the stoma appliance and a battery-powered driver that is magnetically coupled externally onto the pump. The device allows for bolus CR at a rate of infusion that is manually controlled by the patient based on comfort, volume and effluent viscosity. RESULTS: CR provided adequate nutritional support, with successful cessation of PN. Effective use of the device was learnt easily by the patient with minimal demands on nursing assistance. Side effects of CR (diarrhoea, abdominal cramping) were overcome by the patient's ability to manually adjust the reinfusion rate. CONCLUSION: Our experience with the novel Insides System™ device showed promising results in maintaining nutritional status as well as providing a minimally invasive, easy to use and low-cost system for CR. CR should be considered as a viable alternative for the nutritional management of patients with a high-output ECF.

Dangers of delayed diagnosis of perianal abscess and undrained perianal sepsis in Fournier's gangrene: a case series.

Fournier's gangrene (FG) is a rapidly progressing infective necrotising fasciitis of the perianal, perineal and genital region. It is characterised by its aggressive nature and high mortality rates of between 15% and 50%. While it has been commonly found to primarily develop from urological sources, there have been increasing reports of the role of colorectal sources as the underlying aetiology of FG. Presented is a case series of four FG presentations at a single institution during a 12-month period as a result of underlying untreated perianal disease highlighting its dangers in progressing to a deadly infection, advocating for early and aggressive surgical debridement, and the role of adjunct scoring systems, such as Laboratory Risk Indicator for Necrotising Fasciitis, in guiding clinical diagnosis.