Relationship of computed tomography quantified visceral adiposity with the severity and complications of acute pancreatitis: a systematic review.

Whilst obesity and visceral adipose tissue (VAT) have been reported to be associated with an increased risk of severe AP, the established predictive scoring systems have not yet encompassed the impact of obesity or visceral adiposity. In the acute setting, computed tomography (CT) is often performed to assess AP severity and associated complications. With the added benefit of quantifying body fat distribution, it can be opportunistically used to quantify visceral adiposity and assess its relationship with the course of AP. This systematic review identified fifteen studies evaluating the relationship between visceral adiposity measured on CT and the severity of presentations of acute pancreatitis from January 2000 to November 2022. The primary outcome was to assess the relationship between CT quantified VAT and AP severity. The secondary outcomes were to assess the impact of VAT on patients developing local and systemic complications associated with AP. Whilst ten studies showed there was a significant correlation between an increased VAT and AP severity, five studies found otherwise. The majority of current literature demonstrate a positive correlation between increased VAT and AP severity. CT quantification VAT is a promising prognostic indicator with the potential to guide initial management, prompt more aggressive treatment measures or earlier re-evaluation and to aid disease prognostication in patients with acute pancreatitis.

Poorer outcomes associated with sarcopenia following emergency laparotomy: a systematic review and meta-analysis.

BACKGROUND: Despite the negative effect of sarcopenia on postoperative outcomes being well recognized in the elective setting, there remains a paucity of studies describing this phenomenon in the emergency laparotomy (EL) setting. This systematic review and meta-analysis aimed to compare short- and long-term postoperative outcomes following EL in patients with and without sarcopenia. METHODS: A systematic review using PRISMA guidelines was used to identify studies comparing perioperative outcomes following EL for patients with and without sarcopenia. A subsequent meta-analysis was conducted. The following data were extracted from the included studies: patient demographics, pathology or type of operation performed for EL, post-operative mortality at inpatient, 30-day, 90-day and 1-year, and functional outcomes. A quality assessment of included studies was undertaken. RESULTS: Twelve studies reporting the outcomes of sarcopenia following EL were identified. Sarcopenia was significantly associated with higher 30-day and 1-year mortality rates following EL (OR 3.50, P < 0.01; OR 3.49, P < 0.01, respectively). Additionally, sarcopenia was significantly associated with unfavourable functional outcomes at discharge following emergency laparotomy (OR 2.44, p < 0.01). CONCLUSION: Opportunistically identified on cross-sectional imaging, sarcopenia is a valuable predictor of short- and long-term morbidity and mortality following EL. Further studies are required to identify the most appropriate diagnostic criteria of sarcopenia and better define this physiological phenomenon.

Duplicated gallbladder with double cystic duct: hidden in plain sight.

Duplicated gallbladder with double cystic duct is a rare anomaly, with 62 cases reported including this case. We present a 76-year-old man who underwent interval laparoscopic cholecystectomy after previous conservative management of acute cholecystitis. Retrograde dissection of gallbladder was performed due to difficult access. Gallbladder was opened at Hartman's pouch which revealed two bile-flowing structures. Cholangiogram was only successful via one of the ducts with no evidence of leak. Subtotal cholecystectomy was performed after consultation with a Hepatobiliary surgeon. Preoperative computed tomography (CT) and magnetic resonance cholangiopancreatography (MRCP) were reviewed which revealed duplicated gallbladder. CT cholangiogram was performed post-operatively, confirming two separate cystic ducts. Our case emphasizes that anatomical anomalies can still be unappreciated despite having high-resolution CT and MRCP preoperatively, which poses increased risk of biliary tree injury. Routine intraoperative cholangiogram will help avoid bile duct injuries. Literature advises that both gallbladders should be removed to avoid relapse of gallbladder disease.

The role of quantitative radiological measures of visceral adiposity in diverticulitis.

BACKGROUND: Diverticular disease has been linked to obesity. Recent studies have assessed the role of visceral adiposity with diverticulitis and its complications. The aim of this study was to evaluate the association of quantitative radiological measures of visceral adiposity in patients with diverticulitis with vital signs, biochemistry results, uncomplicated versus complicated diverticulitis and its interventions. METHODS: A retrospective analysis of all patients with diverticulitis admitted from November 2015 to April 2018 at a single institution was performed. Data collected included demographics, vital signs, biochemistry results, CT scan findings and management outcomes. The patients were divided into uncomplicated (U) and complicated diverticulitis (C) groups. Visceral fat area (VFA), subcutaneous fat area (SFA) and VFA/SFA ratio (V/S) were measured at L4/L5 level by the radiologist. Statistical analysis was performed to evaluate the association of VFA, SFA, V/S with the parameters in both U and C groups. RESULTS: 352 patients were included in this study (U:C = 265:87). There was no significant difference in vital signs and biochemistry results in both groups. There was no significant difference in VFA, SFA, V/S ratios in both groups. In patients with V/S ratio > 0.4, they were 5.06 times more likely to undergo emergency intervention (95% CI 1.10-23.45) (p = 0.03). On multivariate analysis, a heart rate > 100 (OR 2.9, 95% CI 1.2-6.7), CRP > 50 (OR 3.4, 95% CI 1.9-6.0), WCC < 4 or > 12 (OR 2.1, 95% CI 1.2-3.6) and V/S ratio > 0.4 (OR 2.8, 95% CI 1.5-5.4) were predictive of complicated diverticulitis. CONCLUSION: The quantitative radiological measurement of visceral adiposity is useful in prognostication in patients presenting with diverticulitis.

Opportunistic use of radiological measures of visceral adiposity for assessment of risk of colorectal adenoma.

BACKGROUND: Recent evidence suggested that radiological measures of visceral adiposity are a better tool for risk assessment of colorectal adenomas. The aim of this study was to investigate the association of visceral adiposity with the development of colorectal adenomas. METHODS: A retrospective review of all cases of computed tomography-confirmed acute diverticulitis from November 2015 to April 2018 was performed. Data collated included basic demographics, computed tomography scan results (uncomplicated versus complicated diverticulitis), treatment modality (conservative versus intervention), outcomes and follow-up colonoscopy results within 12 months of presentation. The patients were divided into no adenoma (A) and adenoma (B) groups. Visceral fat area (VFA), subcutaneous fat area (SFA) and VFA/SFA ratio (V/S) were measured at L4/L5 level. Statistical analysis was performed to evaluation the association of VFA, SFA, V/S and different thresholds with the risk of adenoma formation. RESULTS: A total of 169 patients were included in this study (A:B = 123:46). The mean ± standard deviation for VFA was higher in group B (201 ± 87 cm2 versus 176 ± 79 cm2 ) with a trend towards statistical significance (P = 0.08). There was no difference in SFA and V/S in both groups. When the VFA >200 cm2 was analysed, it was associated with a threefold risk of adenoma formation (odds ratio 2.7, 95% confidence interval 1.35-5.50, P = 0.006). Subgroup analysis of gender with VFA, SFA and V/S found that males have a significantly higher VFA in group B (220.0 ± 95.2 cm2 versus 187.3 ± 69.2 cm2 ; P = 0.05). CONCLUSIONS: The radiological measurement of visceral adiposity is a useful tool for opportunistic assessment of risk of colorectal adenoma.

A Multicenter Trial of Vena Cava Filters in Severely Injured Patients.

BACKGROUND: Whether early placement of an inferior vena cava filter reduces the risk of pulmonary embolism or death in severely injured patients who have a contraindication to prophylactic anticoagulation is not known. METHODS: In this multicenter, randomized, controlled trial, we assigned 240 severely injured patients (Injury Severity Score >15 [scores range from 0 to 75, with higher scores indicating more severe injury]) who had a contraindication to anticoagulant agents to have a vena cava filter placed within the first 72 hours after admission for the injury or to have no filter placed. The primary end point was a composite of symptomatic pulmonary embolism or death from any cause at 90 days after enrollment; a secondary end point was symptomatic pulmonary embolism between day 8 and day 90 in the subgroup of patients who survived at least 7 days and did not receive prophylactic anticoagulation within 7 days after injury. All patients underwent ultrasonography of the legs at 2 weeks; patients also underwent mandatory computed tomographic pulmonary angiography when prespecified criteria were met. RESULTS: The median age of the patients was 39 years, and the median Injury Severity Score was 27. Early placement of a vena cava filter did not result in a significantly lower incidence of symptomatic pulmonary embolism or death than no placement of a filter (13.9% in the vena cava filter group and 14.4% in the control group; hazard ratio, 0.99; 95% confidence interval [CI], 0.51 to 1.94; P = 0.98). Among the 46 patients in the vena cava filter group and the 34 patients in the control group who did not receive prophylactic anticoagulation within 7 days after injury, pulmonary embolism developed in none of those in the vena cava filter group and in 5 (14.7%) in the control group, including 1 patient who died (relative risk of pulmonary embolism, 0; 95% CI, 0.00 to 0.55). An entrapped thrombus was found in the filter in 6 patients. CONCLUSIONS: Early prophylactic placement of a vena cava filter after major trauma did not result in a lower incidence of symptomatic pulmonary embolism or death at 90 days than no placement of a filter. (Funded by the Medical Research Foundation of Royal Perth Hospital and others; Australian New Zealand Clinical Trials Registry number, ACTRN12614000963628.).

CT grading scales for splenic injury: why can't we agree?

INTRODUCTION: Computed tomography (CT) has been proven to be able to accurately diagnose splenic injury. Many have published CT splenic injury grading scales to quantify the extent of injury. However, these scales have failed at predicting clinical outcomes and therefore cannot be used to accurately predict the need for intervention. We hypothesised that low interrater reliability is the reason why these scales have failed at predicting clinical outcomes. METHODS AND MATERIALS: This is a retrospective study of patients who were admitted to the Royal Perth Hospital with blunt splenic injury as coded in the trauma registry. The abdominal CT images of these patients were reviewed by three consultant radiologists and were graded using the six different splenic injury grading scales. We assessed interrater reliability between each of the scales using generalised kappa and proportion of agreement calculations. RESULTS: The images of 64 patients were reviewed. The interrater reliability yielded a generalised kappa score of 0.32-0.60 and proportion of agreement ranging from 34.4% to 65.5%. CONCLUSION: The six studied CT splenic injury grading scales did not have a high enough interrater reliability to be adequate for clinical use. The poor interrater reliability is likely to contribute to the failure of the scales at predicting clinical outcomes. Further research to improve the interrater reliability is recommended.