Etiologies and Outcomes Following Duodenal Perforation in Acute Peritonitis: A Systematic Review

Abstract

Duodenal perforation often presents as an acute onset of abdominal pain and potential complications such as systemic infection, multiple organ system failure, and even death. It can result from various causes, including peptic ulcer disease (PUD), trauma, malignancies, and infections. Prompt diagnosis and timely intervention are critical for better outcomes, though mortality can be high, particularly in delayed cases. This systematic review aims to synthesize available literature on the etiologies and outcomes associated with duodenal perforation presenting as acute peritonitis, offering a comprehensive overview for guiding effective management strategies.

A systematic search was conducted across electronic databases including PubMed, CINAHL, and Google Scholar to identify relevant studies published up to August 2024. Inclusion criteria comprised observational studies, case reports, and case series on duodenal perforation in acute peritonitis. Review articles and non-English language studies were excluded. Two reviewers independently performed data extraction with the opinion of a third reviewer to resolve controversies. Information was gathered on study characteristics, patient demographics, etiology, treatment, and outcomes.

A total of 18 studies with 536 participants were included, encompassing a diverse patient population. The primary etiologies identified were PUD, trauma, foreign body, and iatrogenic causes. Treatment approaches ranged from conservative management to surgical interventions, with outcomes varying based on the underlying cause and timeliness of treatment. Postoperative complications were significant, including wound infections, anastomotic leaks, and, in severe cases, multiorgan failure. Mortality was largely associated with delayed intervention. Despite advancements in surgical techniques, the condition still carries a significant risk of complications and mortality, underscoring the need for timely and effective medical care. Future research should focus on developing standardized guidelines to optimize the management of duodenal perforations and reduce associated morbidity and mortality.

Introduction and background

Duodenal perforation most often manifests as acute peritonitis and is characterized by sudden onset of abdominal pain and other clinical features. It may accompany gastrointestinal bleeding with systemic signs of infection and can lead to severe complications if go unrecognized and not managed appropriately [1]. The duodenum is the first segment of the small intestine that continues with the stomach. It is prone to perforation from various etiologies, peptic ulcer disease (PUD) being the most common cause among them [2]. Other significant causes include trauma, malignancies, infections particularly typhoid and tuberculosis, ischemia, diverticula, and some autoimmune diseases [3-5]. Duodenal perforation occurs more commonly among males, with individuals aged between 19 and 45 years and from lower socioeconomic status [6].

Free intraperitoneal gas on abdominal plain film in an erect position is a direct sign of perforation, while intraperitoneal free fluid and reduced intestinal peristalsis are indirect signs. Abdominal ultrasound or computed tomography (CT) scans efficiently diagnose duodenal perforation [7]. Diagnosis can be delayed in atypical cases and when symptoms are masked by other conditions, such as preeclampsia in pregnant women [8]. Prompt recognition and effective management are crucial to prevent severe complications and unfavorable outcomes.

Wound infection, anastomotic leak, burst abdomen, pneumonia, septicemia, and acute renal failure are among some common postoperative complications. In rare cases, patients may present with an anterior abdominal abscess or altered neurological status [9,10]. Mortality rates vary but can be as high as 10%. Septic shock and multiorgan failure are the leading causes of death [9]. Understanding the causes and outcomes of this condition is crucial for effective management and improving patient outcomes. This systematic review aims to comprehensively analyze the etiologies and outcomes of duodenal perforation presenting as acute peritonitis.

Review

Search strategy

A systematic search of the literature was conducted in PubMed, CINAHL, and Google Scholar to identify studies published since inception up to August 2024. The search terms included "duodenal perforation", "acute peritonitis", "etiologies", and "outcomes" in various combinations using Boolean operators. The search was limited to human studies published in the English language.

Inclusion and exclusion criteria

Studies reporting on patients with duodenal perforation presenting as acute peritonitis, studies detailing etiology and outcome with or without treatment methods, observational studies, case reports, and case series were included in this review.

Editorials, commentary, perspectives, opinion papers, review articles, studies focusing on other types of intestinal perforations, non-English language publications, and animal studies were excluded.

Data extraction and analysis

Data were extracted independently by two reviewers IAK and NH using a standardized form. Extracted information included study characteristics, patient demographics, etiology, treatment modalities, and outcomes. Discrepancies were resolved through discussion among the reviewers and the third reviewer MAB.

Results

A total of 340 potentially relevant articles were identified from PubMed (86), CINAHL (216), and Google Scholar (38) of which 322 were available for title and abstract screening. The screening of titles and abstracts rejected 277 studies and 45 articles were retrieved for full-text after the reviewers’ approval based on the selection criteria, of which full texts of 25 articles could not be retrieved and a further two articles were excluded due to inadequate information at this stage. Finally, 18 articles were selected for this systematic review comprising a total of 536 participants. The Preferred Reporting Items for Systematic Reviews and Meta-Analyses (PRISMA) 2020 flow diagram depicting the search, screening, and inclusion is presented in Figure 1.

Selected articles and the summary of the results are presented in Table 1. The included studies span a wide range of geographical locations, including Canada, the USA, the UK, Spain, India, Italy, Japan, Saudi Arabia, Taiwan, France, Turkey, China, and Pakistan. The studies comprised case reports, retrospective studies, and case series, with sample sizes ranging from a single case to 344 patients.

Table 2 shows the reported aetiologies and outcomes from the included articles. Duodenal perforation shows varied aetiologies and outcomes-the majority of patients presented with peritonitis with varying pathogens and commensals.

Etiology

The primary etiology of duodenal perforation identified across the studies was PUD, with various contributing factors including surgical interventions, endoscopic procedures, foreign body (FB) ingestion, trauma, and infections. Several studies highlighted specific risk factors.

PUD is a common cause of duodenal perforation, with mortality rates ranging from 2.9% to 3% in large cohorts [11,12]. Some surgical and endoscopic Interventions like laparoscopic cholecystectomy [13], and endoscopic biliary stent migration [19], were identified as procedural causes of duodenal perforation. Several cases reported perforation due to ingested FBs, such as fish bones [18], and endoscopic clips [27]. Rare pathogens like Candida krusei [16] and Rhizobium radiobacter [20], were implicated in some cases of peritonitis following duodenal perforation.

Outcomes

Timing of surgical intervention, type of surgical intervention, and method of wound closure play a crucial role in patient outcome [19,22]. Multiple organ systems were found affected in a few cases. Mortality was a concern in delayed diagnosis and treatment of duodenal perforation patients. The outcomes varied widely depending on the underlying etiology, promptness of diagnosis, and the management approach. The mortality rates reported were relatively low, with a significant cohort study showing a 2.9% mortality rate [11], and another reporting 3% [12]. However, mortality was not uniformly reported across all studies. Many studies highlighted the importance of timely surgical intervention. Techniques such as primary repair, omental patching, and in more severe cases, complex procedures like gastric disconnection [22], were utilized. Some studies reported successful outcomes with conservative management, such as sealing perforations and using systemic antibiotics [17]. Cases involving rare pathogens were successfully managed with targeted antimicrobial therapy, which was crucial for improving survival rates [16,25]. Postoperative complications such as leakage of the duodenal ulcer [26], and biliary peritonitis [19], were noted, requiring repeat surgical interventions.

Discussion

The findings of this systematic review highlight the multifactorial etiology of duodenal perforations presenting as acute peritonitis, with PUD remaining the predominant cause highlighting the role of effective management of PUD to prevent perforation. Trauma and malignancy also contribute significantly necessitating a high index of suspicion in appropriate clinical contexts. The variability in outcomes is closely linked to the timeliness of diagnosis, the underlying cause, and the management approach. Early diagnosis, facilitated by prompt imaging, and timely surgical intervention are paramount in improving patient outcomes. Conservative management may be suitable for select cases with contained perforations and stable clinical presentation.

PUD was a leading cause, particularly in older studies, highlighting the role of medical advancements in reducing the incidence of such perforations over time [29,30]. Helicobacter pylori infection and the use of non-steroidal anti-inflammatory drugs (NSAIDs) are leading causes of PUD and subsequent duodenal perforation [31]. Other contributing factors include smoking, psychological stress, and certain medical conditions like Zollinger-Ellison syndrome [32].

The role of surgical intervention remains central to the management of duodenal perforations, with various techniques proving effective in different clinical scenarios. The management approach may include a conservative approach, minimally invasive surgeries, or an urgent exploratory laparotomy tailored to the clinical course of the patient [33-35].

Our analysis found that the use of non-operative management in selected cases suggests that conservative approaches can be considered in well-defined situations, particularly where the perforation is sealed and the patient is stable [12,17]. Endoscopic removal of duodenal perforating FBs was found safe and effective and can be the first choice of treatment for experienced endoscopists [27]. Various surgical techniques are used to treat large duodenal perforations, ranging from simple damage-control operations to complex resections. The choice of technique should be guided by factors such as the location of the perforation, degree of tissue loss, and patient stability [26,28,36]. The mortality rate for duodenal perforation varies widely in the literature depending on the complexity of the cases, patient population, and management strategies with reported rates ranging from 2.9% to 26% [37-39].

The review also brought attention to less common causes of duodenal perforation, such as FB ingestion and rare infections, which require a high index of suspicion and prompt management [18,27]. The successful treatment of cases with rare pathogens like Candida krusei and Rhizobium radiobacter highlights the importance of targeted antimicrobial therapy [16,20].

The review also identifies gaps in the literature, including the need for standardized treatment protocols and larger, multicentre studies to better define optimal management strategies. The heterogeneity of the studies and the variability in treatment approaches highlight the necessity for individualized patient care based on clinical presentation and underlying etiology.

The study has a few limitations requiring a careful interpretation. Potential publication bias, heterogeneity, and the quality of the included studies are a few noticeable limitations of this review.

Conclusions

Duodenal perforation presenting as acute peritonitis is a medical emergency requiring prompt diagnosis and evidence-based management. PUD remains the leading cause of duodenal perforation followed by trauma, FB, and iatrogenic causes. Early surgical intervention significantly improves outcomes, although conservative management may be appropriate for certain cases. Despite advancements in surgical techniques, the condition still carries a significant risk of complications and mortality, highlighting the need for timely and effective medical care. This systematic review emphasizes the importance of a tailored approach to the management of duodenal perforations, taking into account the underlying etiology, patient condition, and available resources. Future research should focus on establishing standardized treatment protocols and further exploring the role of minimally invasive techniques in the management of duodenal perforations.