Spectrum of gastrointestinal perforation and its determinants: a single-center hospital-based prospective observational study from North India

Introduction

Gastrointestinal tract perforation is one of the most common and life-threatening abdominal emergencies encountered in general surgical practice. It is defined as a full-thickness breach in the wall of any part of the gastrointestinal tract, leading to leakage of gastric, intestinal, biliary, or fecal contents into the peritoneal cavity. This contamination rapidly results in peritonitis, systemic inflammatory response, sepsis, and, if not treated promptly, multiorgan dysfunction and death. The pylorus of the stomach, first part of the duodenum, and terminal ileum are frequently involved sites, particularly in the Indian subcontinent and other low- and middle-income settings.^1–3 The etiology of gastrointestinal perforation varies across regions and depends on local disease patterns, sanitation, burden of infectious diseases, trauma exposure, health-seeking behavior, and access to emergency surgical care. In many low- and middle-income countries, gastroduodenal and enteric perforations continue to form a large proportion of cases. Peptic ulcer disease remains an important cause of gastroduodenal perforation, especially among patients with delayed treatment, nonsteroidal anti-inflammatory drug use, smoking, alcohol intake, physiological stress, or possible Helicobacter pylori infection. Enteric perforation, commonly involving the terminal ileum, remains a major concern in areas where enteric fever is still prevalent. Tubercular perforation, although less common, is also clinically important in regions with a high burden of abdominal tuberculosis.

Trauma is another important contributor to gastrointestinal perforation. The increasing incidence of road traffic accidents has added to the burden of traumatic abdominal injuries, including hollow viscus perforations. Blunt abdominal trauma may cause bowel wall injury, mesenteric tears, ischemia, and delayed perforation. Large hollow visceral defects may be seen in both the small and large intestine following trauma. Colorectal perforations may occur due to diverticulitis, volvulus, mesenteric ischemia, malignancy, trauma, idiopathic causes, or proximal blow-out lesions.^4–6 Thus, gastrointestinal perforation is not a single disease entity but a heterogeneous emergency condition with varying anatomical sites, causes, clinical severity, and outcomes.

The clinical presentation is usually acute and severe. Patients commonly present with sudden abdominal pain, abdominal distension, vomiting, constipation, fever, tachycardia, dehydration, abdominal tenderness, guarding, rigidity, and features of generalized peritonitis. Erect abdominal radiography may demonstrate free air under the diaphragm, which supports the diagnosis of hollow viscus perforation. However, absence of pneumoperitoneum does not rule out perforation, especially in sealed, posterior, small, or localized perforations. Therefore, diagnosis requires a combination of clinical suspicion, laboratory evaluation, radiological assessment, and intraoperative confirmation. Outcomes in perforation peritonitis depend largely on the duration between symptom onset and definitive treatment. Delay in presentation, preoperative shock, advanced age, comorbid illness, poor nutritional status, severe peritoneal contamination, and delayed operative intervention are associated with worse outcomes. Reported mortality among patients with perforation peritonitis varies from 4% to 11%, with higher mortality among patients presenting late or in poor general condition.⁷ In the Indian context, delays may occur due to late recognition of symptoms, initial treatment from peripheral or informal providers, transport barriers, financial constraints, and delayed referral to tertiary centers.

The management of gastrointestinal perforation is primarily surgical and depends on the site, size, etiology, bowel viability, degree of contamination, and overall condition of the patient. Standard treatment includes early resuscitation, broad-spectrum antibiotics, evacuation of contaminated peritoneal fluid, peritoneal lavage, repair or closure of the perforation, and drainage where indicated.⁸ Procedures may include primary closure with omental patch, resection and anastomosis, exteriorization, ileostomy, or other site-specific interventions. Postoperative care is equally important because complications such as septicemia, surgical site infection, respiratory complications, paralytic ileus, burst abdomen, fecal fistula, and mortality remain common. Local evidence is needed to understand the changing spectrum of gastrointestinal perforation in North India, especially from newly established tertiary care institutions. Such evidence can help improve emergency preparedness, early referral, operative planning, and postoperative monitoring. Therefore, the present study was conducted to describe the etiology, clinical presentation, management, complications, and outcomes of patients presenting with gastrointestinal perforation as a surgical emergency at a tertiary care institute in North India.

Methods

Study design: A single-center, hospital-based, prospective observational study was conducted among patients presenting with gastrointestinal perforation as a surgical emergency. The study was descriptive in nature and aimed to assess the etiological spectrum, clinical presentation, intraoperative findings, postoperative complications, and outcomes among patients with gastrointestinal perforation.

Study duration: The study was conducted from June to December 2024.

Study setting: The study was conducted in the Department of General Surgery, All India Institute of Medical Sciences, Bathinda, Punjab, India. Patients presenting to the surgical emergency with clinical features suggestive of hollow viscus perforation were evaluated and managed according to standard institutional surgical protocols.

Study participants: All patients presenting during the study period with suspected gastrointestinal perforation were screened. Patients were included if the diagnosis was supported by clinical features, radiological findings, and/or confirmed intraoperatively during exploratory laparotomy. Patients of all age groups and both sexes were eligible for inclusion. Patients in whom perforation was not confirmed at evaluation or intraoperatively were excluded from the final analysis.

Sample size and sampling strategy: The sample size was calculated using the single-proportion formula, assuming a 50% expected proportion for the most common etiological category of gastrointestinal perforation. This assumption was used to determine the required sample size at the maximum level in the absence of precise local estimates. At 95% confidence level and 16% absolute precision, using the formula n = Z²pq/d², the minimum required sample size was 38. After accounting for incomplete records or missing postoperative outcome documentation, the final sample size was rounded to 40 patients.

A consecutive sampling strategy was used. All eligible patients presenting to the surgical emergency with suspected gastrointestinal perforation between June and December 2024 were screened. Patients with clinically, radiologically, and/or intraoperatively confirmed gastrointestinal perforation were enrolled consecutively until the required sample size was achieved. Consecutive sampling was considered appropriate because gastrointestinal perforation is an emergency condition, and random sampling is not feasible in acute surgical care.

Results

A total of 40 patients with gastrointestinal perforation were included. Most patients were aged 21–30 years [15/40, 37.5%], followed by 31–40 years [13/40, 32.5%], above 40 years [9/40, 22.5%], and 11–20 years [3/40, 7.5%]. Males predominated [33/40, 82.5%]. The commonest etiology was gastroduodenal perforation [19/40, 47.5%], followed by enteric perforation [17/40, 42.5%]. Traumatic perforation accounted for 2 cases [5.0%], while tubercular and other causes accounted for 1 case each [2.5%] [ Table 1].

Gastroduodenal perforation was more common in older age groups, with 7 patients each in the 31–40 years and above 40 years categories [36.8% each]. Enteric perforation was more frequent among younger adults, especially the 21–30 years age group [8/17, 47.1%]. Male predominance was seen across all etiologies, particularly in gastroduodenal perforation [18/19, 94.7%]. Among enteric perforations, 11 patients [64.7%] were male and 6 [35.3%] were female [ Table 2]. The clinical profile was typical of acute perforation peritonitis. Abdominal pain and tachycardia were present in all patients [100.0%]. Air under the diaphragm was seen in 39 patients [97.5%]. Other common findings included abdominal tenderness [36/40, 90.0%], dehydration [34/40, 85.0%], abdominal distension [34/40, 85.0%], guarding [29/40, 72.5%], fever [24/40, 60.0%], and constipation [12/40, 30.0%]. Fever and constipation were more frequent in patients with enteric perforation, observed in 16 [94.1%] and 11 [64.7%] patients, respectively [ Table 3].

Postoperative morbidity was high. Septicemia was the most common complication [35/40, 87.5%], followed by surgical site infection [25/40, 62.5%] and respiratory complications [24/40, 60.0%]. Paralytic ileus occurred in 10 patients [25.0%], burst abdomen in 4 [10.0%], fecal discharge in 2 [5.0%], and transfusion reaction in 1 [2.5%]. Septicemia was common in both gastroduodenal [17/19, 89.5%] and enteric perforations [14/17, 82.4%] [ Table 4]. There were 3 deaths, giving an overall mortality of 7.5%. Mortality occurred in 2 patients with gastroduodenal perforation [10.5%] and 1 patient with enteric perforation [5.9%]. Overall, all patients developed at least one listed postoperative complication, while major complications were observed in 38 patients [95.0%] [ Table 5].

Discussion

Gastrointestinal perforation remains a major surgical emergency because it progresses rapidly from localized peritoneal contamination to generalized peritonitis, sepsis, postoperative morbidity, and death if not managed promptly. The present study describes the etiological spectrum, clinical presentation, postoperative complications, and outcomes among 40 patients presenting with gastrointestinal perforation at a tertiary care institute in North India. Four key messages emerge from this study: first, gastroduodenal and enteric perforations formed the major etiological burden; second, the disease predominantly affected young and middle-aged males; third, most patients presented with classical features of perforation peritonitis, making early clinical recognition feasible; and fourth, postoperative morbidity was substantial, with septicemia, surgical site infection, and respiratory complications being the major adverse outcomes.

The first important finding was that gastroduodenal perforation was the most common etiology, followed closely by enteric perforation. In the present study, 19 patients had gastroduodenal perforation and 17 had enteric perforation, while traumatic, tubercular, and other causes were less frequent. This pattern is consistent with the clinical profile reported from many Indian and other low- and middle-income settings, where peptic ulcer disease and enteric fever continue to contribute substantially to perforation peritonitis. Nair et al. also reported comparable findings in non-traumatic intestinal perforation.⁹ The predominance of gastroduodenal perforation may reflect persistent exposure to risk factors such as untreated peptic ulcer disease, self-medication with nonsteroidal anti-inflammatory drugs, smoking, alcohol use, physiological stress, and delayed care-seeking. The continued occurrence of enteric perforation also suggests the ongoing burden of enteric fever and delayed diagnosis or treatment of febrile gastrointestinal illness in the community.

The second key finding was the age and sex pattern of gastrointestinal perforation. Most patients belonged to the 21–30 and 31–40 years age groups, indicating that perforation affected individuals in economically productive age groups. Gastroduodenal perforations were more common in the 31–40 years and above-40 years groups, while enteric perforations were more frequent among younger adults, particularly those aged 21–30 years. This is broadly similar to earlier case series by Dickson and Cole, Baliga, Ahmed et al., and Vaidyanathan, where enteric perforation was commonly observed in younger adults.^10–13 Other studies have shown variable age distribution, which may be explained by differences in local epidemiology, infectious disease burden, trauma exposure, and access to care.^14–19

A marked male predominance was observed in this study. Males accounted for more than four-fifths of the study population, and male predominance was particularly pronounced among cases of gastroduodenal perforation. Similar male predominance has been reported by Karmarkar, Vyas, Rao, Sepaha, and Prasad.,^{14,15,21–23} This may be due to greater occupational and outdoor exposure, higher rates of smoking and alcohol use, increased exposure to trauma, and possible delay in seeking care among men. However, this explanation remains speculative, as the present study did not systematically collect behavioral risk factors such as tobacco use, alcohol intake, NSAID use, or prior peptic ulcer disease.

The third key message relates to the clinical and radiological presentation. Most patients had classical features of perforated peritonitis. Abdominal pain and tachycardia were present in all patients, while air under the diaphragm was seen in nearly all cases. Abdominal tenderness, dehydration, distension, guarding, fever, and constipation were also common. Similar clinical features have been documented by Archampong, Swadia, and Chouhan.,^20,17,8 The high frequency of classical signs suggests that careful clinical evaluation remains central to early diagnosis, especially in emergency settings where advanced imaging may not be immediately available. The presence of air under the diaphragm in most patients was also consistent with findings reported by Shah, Welch, and Mahendra.,^24,18,25 However, one patient did not show air under the diaphragm, reinforcing that absence of pneumoperitoneum should not exclude the diagnosis when clinical suspicion is high.

The fourth and most clinically important finding was the high postoperative morbidity. Septicemia was the most common postoperative complication, followed by surgical site infection and respiratory complications. Paralytic ileus, burst abdomen, fecal discharge, transfusion reaction, and mortality were also observed. These complications are expected in perforation peritonitis because patients often present with established contamination, dehydration, electrolyte imbalance, sepsis, and poor physiological reserve. Similar postoperative complications have been reported by Karmarkar and Nair.,^14,9 The findings emphasize that surgical repair alone is not sufficient; outcomes depend equally on timely resuscitation, source control, antibiotic coverage, sepsis monitoring, wound care, respiratory support, and postoperative surveillance.

The mortality in the present study was 7.5%, with deaths occurring among patients with gastroduodenal and enteric perforations. Previous studies by Franklin and Vaidyanathan reported lower death rates.,^26,13 Mortality in perforation peritonitis is commonly related to delayed presentation, toxemia, anemia, dehydration, electrolyte imbalance, preoperative shock, and severe peritoneal contamination. Although this study did not quantify duration of symptoms before admission or preoperative shock in detail, delayed presentation is likely to remain a major determinant of poor outcome in this setting. Strengthening early referral and emergency transport may therefore reduce avoidable mortality.

This study has some strengths. It was a prospective observational study conducted in a real-world surgical emergency setting. Patients were recruited consecutively, reducing selection bias within the hospital setting. The study captured clinically relevant variables, including etiology, age and sex distribution, presenting features, radiological findings, postoperative complications, and mortality. It also provides useful local evidence from a newly established tertiary care institute in North India, where such data are limited.

However, the study has important limitations. First, the sample size was small, limiting subgroup comparisons and statistical inference. Second, it was a single-center study, and findings may not be generalizable to other regions or levels of care. Third, several important determinants of outcome, such as duration from symptom onset to admission, preoperative shock, comorbidities, NSAID use, tobacco or alcohol exposure, nutritional status, severity of peritoneal contamination, and time to surgery, were not analyzed in detail. Fourth, postoperative outcomes were assessed during hospital stay only; long-term morbidity, readmission, stoma-related outcomes, and quality of life were not evaluated. Finally, the study was descriptive, so causal associations between etiological factors, management patterns, and outcomes cannot be established.

Several clinical recommendations emerge from this study. Patients presenting with acute abdominal pain, distension, fever, tachycardia, dehydration, guarding, or features of peritonitis should be evaluated urgently for possible gastrointestinal perforation. Erect abdominal X-ray remains a useful first-line investigation, but absence of air under the diaphragm should not delay surgical decision-making if clinical suspicion is high. Early resuscitation, broad-spectrum antibiotics, correction of fluid and electrolyte imbalance, timely exploratory laparotomy, adequate peritoneal lavage, and appropriate procedure selection are essential. Postoperatively, sepsis surveillance, wound monitoring, respiratory care, nutritional support, and early identification of complications should be standardized. At the health-system level, early referral pathways, ambulance access, and timely transfer from peripheral centers to surgical facilities should be strengthened.

In conclusion, gastroduodenal and enteric perforations were the predominant causes of gastrointestinal perforation in this hospital-based study from North India. The condition mainly affected young and middle-aged males and commonly presented with classical features of perforation peritonitis, including abdominal pain, tachycardia, tenderness, dehydration, distension, guarding, and radiological evidence of pneumoperitoneum. Postoperative morbidity was high, with septicemia, surgical site infection, and respiratory complications being the major complications. Mortality was observed mainly among gastroduodenal and enteric perforation cases. Early recognition, prompt referral, aggressive resuscitation, timely surgical intervention, and structured postoperative care are essential to reduce morbidity and mortality among patients with gastrointestinal perforation.

Ethics approval

This study was conducted in accordance with the principles of the Declaration of Helsinki and applicable institutional ethical requirements. Ethical approval was obtained from the Institutional Ethics Committee, AIIMS Bathinda [Approval No.: IEC/AIIMS/BTI/2023/11/01; Date: 4 November 2023]. Written informed consent was obtained from all participants before enrolment. For patients with emergency surgical conditions who were unable to provide consent at presentation, consent was obtained from their legally authorized representatives. As this was an observational study of routinely managed emergency surgical patients using anonymized clinical data, no additional interventions were performed beyond standard care. Patient confidentiality was maintained, and no personal identifiers were used in the analysis or manuscript.