Complicated intra-abdominal infections: a prospective validation study of the WSES Sepsis Severity Score

Open abdomen versus primary closure in the management of severe abdominal sepsis: What is the right way? Results of the last 5 years of a reference center

PURPOSE

WSES guidelines allow open abdomen (OA) for critically ill patients due to secondary peritonitis in the case of inadequate source control, but this option results quite vague and with a low grade of evidence (Grade 2 C). Moreover, the emerging increasing in literature of complications, makes the use of OA in secondary peritonitis more debated. The aim of our study is to analyze the postoperative outcomes of patients undergoing OA versus primary closure (PC) in secondary peritonitis.

METHODS

We collected data from Tertiary Trauma Center from 2019 to 2024. The study included patients who underwent urgent laparotomy for severe secondary peritonitis, divided into two groups based on the strategy chosen in the index laparotomy: PC or OA. We retrospectively analyzed the data, considering as primary outcome post-operative mortality, while as secondary outcomes short terms complications and LOS.

RESULTS

283 patients fit the research for the diagnosis of peritonitis but only 176 were included as with a WSES-SSS > = 7. 128 patients (72,7%) were in the PC group, while 48 (27,3%) were managed with an OA strategy. There were no statistical differences in terms of mortality (p = 0.371), between the two groups. Complications were higher in the OA group (p = 0.001). From the logistic regression only MPI resulted an independent factor of mortality (p = 0.016; OR 1.080).

CONCLUSION

The study shows that OA in severe secondary peritonitis does not improve mortality and is associated with higher short-term complications and incisional hernias. However, RCT are necessary to better investigate the role of OA in the management of abdominal sepsis.

2024 Clinical Practice Guideline Update by the Infectious Diseases Society of America on Complicated Intra-abdominal Infections: Risk Assessment in Adults and Children

This paper is part of a clinical practice guideline update on the risk assessment, diagnostic imaging, and microbiological evaluation of complicated intra-abdominal infections in adults, children, and pregnant people, developed by the Infectious Diseases Society of America. In this paper, the panel provides a recommendation for risk stratification according to severity of illness score. The panel's recommendation is based on evidence derived from systematic literature reviews and adheres to a standardized methodology for rating the certainty of evidence and strength of recommendation according to the GRADE (Grading of Recommendations, Assessment, Development, and Evaluation) approach.

Interrelationship between endotoxicosis and syndrome of intraabdominal hypertension in pathogenesis of abdominal sepsis

Objective. Studying of mutual role of the main pathogenetic factors of abdominal sepsis – the inflammation origin and intraabdominal hypertension, from the one side, endotoxicosis and the abdominal compression syndrome (ACS), from the other side. Materials and methods. Into the investigation 196 patients with abdominal sepsis were included, in whom after the certain preliminary preparation the operative procedure was done. The levels of neutrophils, macrophages, interleukin–6, interleukin–10 in peritoneal exudate were studied as indices of the inflammation source for abdominal cavity. These indices were characteristic for systemic answer on general reaction, the degree of which have determined the abdominal sepsis course and result. Determination of intraabdominal pressure was applied for estimation the intraabdominal hypertension role in abdominal sepsis. Results. The ratio of the endotoxicosis and the ACS indices in the complications structure, not dependent on some differences due to the complication type present, was practically similar. Conclusion. The results of the investigation conducted, witnesses the presence of interrelationship of roles of endotoxicosis and the abdominal compression syndrome in pathogenesis of abdominal sepsis, their indices changes are characterized by mutual activity strengthening, accompanied by clinical manifestations of the organs dysfunction, determining the severity of course and result of pathological process in the organism.

[Eritonitis outcome prediction]

The review is devoted to the most common general clinical and specific grading systems for peritonitis outcome prediction. Particular attention is paid to methodological approaches, prediction reliability, simplicity of use in clinical practice and their importance in decision-making. It is shown that none of the modern grading systems is universal and absolutely reliable. Combining several systems is quite difficult and will take additional time that is impossible for intraoperative environment. Despite various systems for peritonitis outcome prediction, none of them can completely satisfy surgeons, primarily in choice of surgical access, intervention type and option for its completion.

New System For Predicting The Outcome Of Secondary Peritonitis

Despite improvements in the methods of diagnostics, surgical interventions and intensive care, the problem of treating patients with diffuse peritonitis remains relevant. Diffuse peritonitis is a major contributor to mortality in all urgent care settings and the second leading cause of sepsis in critically ill patients. At the same time, even in developed countries, the number of patients with peritonitis does not tend to decrease, and mortality rates remain high, reaching 90-93% with the development of abdominal sepsis and toxic shock syndrome. One of the ways to reduce mortality in peritonitis is the use of objective systems for prognosis of the peritonitis outcome, allowing to compare the results of patient treatment and to choose the optimal treatment tactics for each particular patient. The objective — To develop a new system for predicting the outcome of secondary peritonitis (survival or death) focused on the criteria of abdominal sepsis and multiple organ dysfunction syndrome (associated or not associated with peritonitis), and to analyze its accuracy versus the most common comparable systems. Material and Methods — Our study was based on analyzing the treatment outcomes in 352 patients with secondary diffuse peritonitis. On admission, sepsis was diagnosed in 15 (4.3%), and toxic shock in 4 (1.1%) patients. The main causes of death were purulent intoxication and/or sepsis (51 cases or 87.9%), cancer intoxication (4 cases or 6.9%), and acute cardiac failure (3 cases or 5.2%). We analyzed the effectiveness of several systems of predicting the peritonitis outcomes: the Mannheim’s Peritoneal Index (MPI), World Society for Emergency Surgery Sepsis Severity Score (WSES SSS), Acute Physiology and Chronic Health Evaluation II (APACHE II) system, general Sequential Organ Failure Assessment Score (gSOFA), as well as the Peritonitis Prognosis System (PPS) developed by the authors. The probability of the effect of 40 clinical and laboratory parameters on the outcome of patients with secondary peritonitis was analyzed via using parametric and nonparametric methods of statistical analysis (Fisher’s test, Mann-Whitney U test, Chi-squared test with Yates’s continuity correction). The criteria were selected that had a predictive power for the lethal outcome (p <0.05), and they were included in the PPS system. To compare the predictive value of the PPS, ROC analysis was conducted with construction of receiver operating characteristic curves for each analyzed system of predicting the peritonitis outcome. The STATISTICA 8 software was used for performing the statistical analysis. Results — The following criteria were of greatest importance in predicting the lethal outcome: a patient’s age, a presence of a malignant neoplasm, a nature of the exudate, the development of sepsis (toxic shock), as well as multiple organ dysfunction not associated with the developed peritonitis. PPS exhibited the greatest accuracy in terms of predicting mortality in patients with secondary diffuse peritonitis (AUC=0.942) versus minimal in APACHE II (AUC=0.840). Conclusion — APACHE II, MPI, WSES SSS and PPS can be considered reliable in terms of mortality prognosis in peritonitis patients. PPS has the greatest accuracy of predicting the mortality in patients with secondary diffuse peritonitis (94%).

Management of abdominal tuberculosis in a community-based hospital in a high-income developing country

Background

The delayed diagnosis and management of abdominal tuberculosis increases its mortality. We aimed to study the clinical presentation, management, and outcome of patients who had abdominal tuberculosis and were treated at Al-Ain Hospital, Al-Ain City, United Arab Emirates.

Methods

All patients who had abdominal tuberculosis and were treated at Al-Ain Hospital between January 2011 and December 2018 were studied. Data were collected retrospectively using a structured protocol including demography, clinical presentation, diagnostic methods, management, and outcome.

Results

Twenty-four patients having a median age of 30 years were studied with an incidence of 0.6/100,000 population. The most common symptoms were abdominal pain (95.8%) and malaise (79.2%). Fever was present only in nine patients (37.5%). Laboratory investigations, except for polymerase chain reaction immunoassay, were not helpful. Chest X-ray was abnormal in three patients (12.5%). Ultrasound and abdominal CT scan were non-specific. Thirteen patients needed surgical intervention for diagnosis or therapy. Diagnosis was confirmed by histopathology in 15 patients (62.5%), immunological assays in 7 patients (29.2%), microbiological culture in 1 patient (4%), and therapeutic trial in 1 patient (4%). The most common type of abdominal tuberculosis was gastrointestinal in 13 patients (54.2%) followed by free wet peritonitis in 5 patients (20.8%). All patients had quadruple anti-tuberculous therapy for a minimum of 6 months. The median hospital stay was 6.5 days. None of our patients died.

Conclusions

Diagnosis of abdominal tuberculosis remains challenging despite advances in medical technology and diagnostic tools. The limited need for diagnostic therapy in our study supports the benefit of PCR assay. Surgery was mainly indicated as the last option to reach the diagnosis or to treat complications.

Novel Multiparametric Nomogram for Overall Survival Prediction in Complicated Intra-Abdominal Infection: A Multicenter Study in China

Background: Complicated intra-abdominal infections (cIAIs) in the abdominal cavity or within an abdominal organ are numerous and frequent dangerous entities in the treatment of critically ill patients. Early clinical evaluation is necessary.

Methods: This retrospective multicenter study included patients from 10 intensive care units (ICUs). Risk factors for the overall survival (OS) of patients with cIAI were selected using least absolute shrinkage and selection operator regression, and a nomogram was constructed subsequently. Calibration curve and receiver operating characteristic (ROC) curve were used to evaluate the calibration and discriminative ability.

Results: In total, 544 patients diagnosed with cIAI were enrolled and divided into the study (n = 276) and validation (n = 268) sets. Sex, acute gastrointestinal injury, acute kidney injury, rare bacterium infection, Charlson score, and APACHE II score were identified as independent risk factors and were constructed for the nomogram. The nomogram showed marked calibration capability with a concordance index (C-index) of 0.909 and 0.831 in the study and validation set, respectively. Compared with the common clinical prognostic scoring system, the nomogram achieved the highest discrimination ability with an area under the curve (AUC) value of 0.91 and 0.83 in the study set and validation set, respectively.

Conclusions: Our newly constructed nomogram provides a useful tool for risk stratification and prognosis evaluation of cIAI.

MANAGEMENT OF POSTOPERATIVE PERITONITIS IN LOW-RESOURCES SERVICES

Background. Postoperative peritonitis (PP) reminds one of the most difficult complications in abdominal surgery with mortality rate 22.3 – 90 %. Methods. In Ivano-Frankivsk Regional (tertiary level) Clinical Hospital (Ivano-Frankivsk, Ukraine) during 2010–2017 were operated 8762 patients with acute and chronic diseases of digestive system (appendicitis, pancreatitis, cholecystitis, bowel obstruction, complicated ulcer of upper gastrointestinal truck, mesenteric vessels thrombosis, abdominal adhesion diseases, hernia, Chron’s diseases, abdominal trauma), among them in 209 (2.4 %) patients developed PP. Local PP (abscess of abdominal cavity) had 142 (67.9 %), diffuse PP – 67 (42.1 %) patients. Results. Clear local symptoms of peritonitis were absent in 178 (85.1 %) of 209 patients. General complication, such as acute respiratory failure had 95 (45.5 %), cardiovascular insufficiency – 68 (32.5 %), hepato-renal dysfunction - 46 (22 %) patients with PP. 129 (61.7 %) patients were treated by minimally invasive approach: 24 patients had laparoscopic lavage with drain of abdominal cavity abscess and 105 - ultrasound guided drain of abscess with catheter. 80 (38.3 %) patients had re-laparotomy (RL): 61 (91 %) from 67 with diffuse PP, 19 (13.4 %) from 142 patients – with local PP. 46 (57.5 %) patients underwent one RL, 26 (32.5 %) – two, 8 (10 %) patients – three RL. With increasing numbers of RL, increase mortality rate: after first RL died 7 (15.2 %) of 46 patients, after second RL – 12 (63.2 %) of 19, after third RL 6 (75 %) of 8 patients. Conclusions. Together with standard surgical methods and precise technique were used lavage of abdominal cavity with 8 – 12 litres of antiseptic solutions, solution for peritoneal dialysis intraabdominally, nasointestinal drain tube, what was favourable for faster treatment of abdominal sepsis, reducing number of RL and postoperative mortality.