Predictors of relaparotomy for persisting intra abdominal infection in secondary peritonitis

Background: Peritonitis is one of the commonest causes of acute abdomen in Ethiopia. One of the causes of high morbidity and mortality is persistent intraabdominal infection. The two essential approaches for managing post-op collection are laparotomy on-demand and planned Relaparotomy. Despite multiple studies, both have comparative mortality. This study aimed to identify clinical variables that are predictive of persistent intraabdominal infection. Methods: A retrospective study was conducted on patients who were operated on from Sept 2018 to April 2020 at two affiliated referral hospitals of AAU, college of Medicine; Yekatit 12 hospital Medical College and Minilik II referral Hospital. All of the patients were cases of secondary peritonitis. Clinical progress of the patients from admission to discharge/death was documented. Multiple preoperative and intraoperative variables were analyzed to develop the predictive clinical model. Results: Out of 172 laparotomy cases for secondary peritonitis, 40 (23.3%) required relaparotomy for postop collection. From Patients who developed postop collection, 45% of them were diagnosed after pus/Gi content leaked through the surgical wound. The mortality rate of patients who develop postop collection and undergone relaparotomy was 27.5 % and 4.5% for those without postop collection. Logistic regression identified 4 variables as having significant predictive value: Duration of illness more than 5 days, Systolic BP 1000 ml, and small bowel as a source of contamination. Overall prediction successes of the above model is 88.4% (sensitivity 53.3%, specificity 96.8%). Conclusion: Management of persistent intra-abdominal infection is challenging. We have identified 4 clinical variables that predict persistent intraabdominal infection requiring relaparotomy. These sets of variables can be a milestone for future validation study before being inserted in today to day clinical practice.

Surgical Aspects of the Treatment of Patients With Generalized Peritonitis

BACKGROUND Much attention is currently given to the issues of surgical treatment of common forms of secondary peritonitis, which is associated with unsuccessful results of treatment of this group of patients and the lack of a unified approach to surgical tactics among patients requiring repeated surgical interventions for adequate sanitation of the abdominal cavity.AIM OF STUDY Improvement of the immediate results of treatment of patients with generalized secondary peritonitis by determining the approaches to choosing the optimal surgical tactics.MATERIAl AND METHODS We analyzed the results of treatment of 220 patients with common forms of secondary peritonitis who were treated at the Elizavetinskaya hospital of St. Petersburg in the period from 2013 to 2019. The indicated patients were divided into two groups, comparable in terms of the main features, including the depth pathomorphological changes in the abdominal cavity, assessed by calculating abdominal cavity index (ACI) and the Mannheim peritonitis Index (MPI). The main group consisted of 109 patients, where developed algorithm was used, which supposed planned sanitation relaparotomies within up to 2 days in patients with high values of ACI and MPI. The comparison group included 111 patients who underwent sanitation interventions “on demand”, that is, in the presence of signs of persistence of the infectious process in the abdominal cavity. The results of treatment were compared by assessing the level and structure of postoperative mortality, the frequency of complications, and the length of stay in intensive care units and hospital. Mathematical-statistical dataprocessing, calculations of intensive and extensive coefficients of features, assessment of the statistical significance of differences in features for the studied groups were carried out.RESUlTS The use of a differentiated approach to performing planned relaparotomy in patients with generalized peritonitis made it possible to reduce the overall mortality 1.7-fold (from 51.3 to 30.2%) (p=0.001) due to a decrease in the proportion of abdominal sepsis as a cause of unfavorable the outcome. No significant effect of the use of this algorithm on the frequency and structure of complications, as well as the duration of multiple organ failure, was found.FINDINGS The use of planned relaparotomy among the selected patients helps to reduce postoperative mortality without significantly negatively affecting other treatment results.

The Results of the Planned Relaparotomy and Laparostomy in Treatment of Generalized Purulent Peritonitis

Background.Laparostomy (open abdomen) is an aggressive surgical treatment of peritonitis and it requires justification of its effectiveness. Aims. The aim of the study was to determine the effectiveness of laparostomy and planned rehabilitation in patients with common purulent peritonitis.Materials and methods.Retrospective analysis of the results of laparostomy and planned sanations in patients with common purulent peritonitis. The study included 101 case histories. Inclusion criteria: generalized purulent peritonitis established in the primary surgical intervention that required the implementation of laparotomy. The excluded from the study were immunocompromised patients, hemodialysis patients, patients with pancreatic necrosis, closed abdominal trauma, class C liver cirrhosis, carcinomatosis, cancer cachexia, disseminated tuberculosis, total mesenteric thrombosis. In statistic processing we used indicators of median and inter quartile ranges, methods of nonparametric statistics (Mann – Whitney criterion). The level of significance was α = 0.05.Results.The whole group is divided into three subgroups according to MPI: subgroup I – 20 people, subgroup II – 57, subgroup III – 24. The method of planned sanation of the abdominal cavity in combination with laparostomy was applied in 34 cases (33.6 %). In the first subgroup in two cases (10 %), in the second – in 18 (31.6 %), in the third – 14 (58.3 %). The deceased, regardless of the chosen surgical technique, were characterized by higher values of integral scales. The severity of the condition of the surviving patients in which the technique was used at the time of admission was significantly higher than the severity of the surviving patients, in which laparostomy SAPS II was not used (p = 0.4716). However, their age was significantly older (p = 0.5476). The deceased patients were older 60 years with high rates on the above mentioned integrated scales.Conclusions.The results showed that patients older than 60 years, II & III on MPI and with high values of integral scales require more balanced and differential approach when using laparostomy (open abdomen).

Prediction for a planned relaparotomy in secondary peritonitis

Aims. To devise a scoring system for clinical variables related to positive findings at relaparotomy in secondary peritonitis. Methods. We have retrospectively studied 195 cases of patients after relaparotomy. According to the operation’s findings, the patients were divided into two groups: ‘relaparatomy unnecessary’ group A, ‘relaparotomy necessary’ group B. 6 factors (age, sex, leukocyte count, C reactive protein, time of symptoms to index operation, Mannheim Peritonitis Index) were evaluated in respect to their significance in decision making for relaparotomy. The predictive value for positive operation`s findings of these factors was evaluated by logistic multivariate regression analysis. According to this model a risk scoring system was created to support the decision whether to perform a relaparotomy. Results. Relaparotomy was unnecessary (Group A) for 154 (79,0%) patients, for 41 (21,0%) it was necessary (Group B). Comparing the groups A and B, we found a significant difference in patients’ mean age (54 v. 63 years, p=0,002), mean CRP level (133,2 v. 182,8 mg/L, p=0,025), mean time of symptoms to index operation (38,1 v. 67,1 hours, p=0,006) and mean MPI value (22,4 v. 29,4, p<0,0001). According to the above-mentioned predictors, a scoring system was devised: −0,17-(0,003×patient’s age years)+(0.153×time of symptoms to index operation hours)-(0,297×MPI)+(0,192×CRP mg/l). The score was 24,798±25,593 in group A and 36,572±32,543 in group B(p=0,028). Conclusions: Scoring system was devised to assist in creating treatment strategy after secondary peritonitis. If the score is ≥37, a planned relaparotomy should be performed. If the score is ≤24, other diagnostic and therapeutic tactics should be applied.