Neonatal pneumoperitoneum: a critical appraisal of its causes and subsequent management from a developing country

Benign pneumoperitoneum in a neonate receiving positive pressure ventilation: A case report and clinical insights

The presence of air in the peritoneal cavity demonstrated radiographically as the crescent of air under the diaphragm is termed pneumoperitoneum. The causative agents may be divided into spontaneous, traumatic, iatrogenic, and miscellaneous. The majority (∼ 90%) of cases are attributed to hollow viscus perforation which requires immediate surgical attention. Neonatal pneumoperitoneum is a surgical emergency unless proven otherwise. A distinct entity termed benign pneumoperitoneum occurs in the absence of clinical and paraclinical features of peritonitis. Benign pneumoperitoneum may be caused by various thoracic, abdominal, and gynecological conditions. In neonates with respiratory distress pneumoperitoneum is a frequent association especially when treated with mechanical ventilation. The air leak phenomenon leads to air tracking from the ruptured alveoli along the interstitium to the mediastinum then to the retroperitoneum and ultimately into the peritoneal cavity. Such patients usually do not require surgical intervention and are managed conservatively. Knowledge of the existence of benign pneumoperitoneum helps to avoid unnecessary surgery thereby reducing operative morbidity and mortality.

Perforated Meckel's Diverticulum and Adhesive Intestinal Obstruction in a Preterm Neonate: A Case Report

Perforated bowel and adhesive intestinal obstruction are common indications for emergency surgical intervention in a preterm neonate. The initial approach to managing perforation involves either peritoneal drain insertion or formal laparotomy. Once a neonate presents with complete bowel obstruction, prompt abdominal exploration becomes crucial. One prevalent cause of bowel obstruction in this population is adhesions resulting from previous surgeries. This report details the case of a preterm, extremely low birth weight neonate experiencing pneumoperitoneum, initially managed with an intraperitoneal drain. Despite temporary improvement, the infant developed recurrent pneumoperitoneum, necessitating formal exploratory laparotomy. Approximately one month post-surgery, the baby encountered complete bowel obstruction due to adhesive intestinal obstruction, requiring a second exploratory laparotomy. The child survived both surgical interventions and is thriving at follow-up. Our findings suggest that in select cases, intraperitoneal drain placement may suffice. However, there is a need for further research to improve the suspicion and diagnosis of Meckel's diverticulum perforations in neonates. Additionally, vigilant assessment and timely intervention for adhesive intestinal obstruction can enhance bowel salvage outcomes.

Distinctive clinical features of spontaneous pneumoperitoneum in neonates: A retrospective analysis

BACKGROUND

Spontaneous pneumoperitoneum (SP) without gastrointestinal perforation rarely occurs in neonates, with most SP cases being idiopathic. Although SP usually follows a benign clinical course with favorable prognosis, it can become life-threatening in certain situations. In these cases, urgent surgical intervention may be required. Therefore, it may be difficult to decide when or how to perform prompt interventions.

AIM

To demonstrate the distinct clinical features of SP to guide appropriate management by comparing characteristics between SP and typical pneumoperitoneum secondary to gastrointestinal perforation.

METHODS

We retrospectively reviewed electronic medical records and identified 37 neonates with radiological evidence of pneumoperitoneum who were treated at our institution. Clinical variables were compared between neonates with SP without gastrointestinal perforation (Group A) and those with pneumoperitoneum secondary to gastrointestinal perforation (Group B). Clinical variables between groups were compared using Student’s t-test and the chi-square test. The risk factors related to mortality were examined using multi-logistic regression analysis.

RESULTS

Group A comprised 35.1% (13/37) of the patients. The frequency of persistent pulmonary hypertension (53.8%) and pneumothorax (46.2%) before the development of pneumoperitoneum was significantly higher in group A than in group B (P = 0.004). Platelet count and partial pressure of arterial oxygen (PaO2) were significantly lower in group A (P = 0.015 and 0.025, respectively). Overall mortality was significantly higher in group A than in group B (76.9% vs 16.7%, P = 0.001). Only preterm infants were significantly associated with high mortality (P = 0.041; odds ratio = 18.0). Accompaniment with persistent pulmonary hypertension and pneumothorax were also significantly high (P = 0.004) in group A, but these were not strongly associated with high mortality.

CONCLUSION

This study identified a higher mortality rate in patients with SP than that described in previous reports. Neonates with SP were more likely to have thrombocytopenia, pneumothorax, and persistent pulmonary hypertension. Prematurity was the most significant factor affecting mortality.

Idiopathic pneumoperitoneum without gastrointestinal perforation in a low-birth weight infant: A rare type of air leak syndrome

Neonatal free air on X-ray images is generally due to intestinal perforation, and requires surgical intervention. However, some cases without intestinal perforation show free air on X-ray images. Pneumoperitoneum without perforation is caused by an air leak syndrome. We present here the case of a low-birth-weight infant with free air on X-ray images, who had no evidence of intestinal perforation intraoperatively.

[Neonatal caecal perforation revealing congenital megacolon]

Spontaneous intestinal perforations are rare in a full term new-born. We report the case of an infant born at 41 weeks' gestation who, three days after birth, had pneumoperitoneum revealing congenital megacolon. Surgical exploration showed diastatic perforation of the cecum associated with a disparity in rectosigmoid caliber. The patient underwent emergency caecostomy after peritoneal washing. Histological examination of the biopsy specimens confirmed the diagnosis of congenital megacolon. The postoperative course was simple and radical treatment was performed six months later.

Spontaneous Pneumoperitoneum in Pediatric Patients: Dilemmas in Management

Context:

Pneumoperitoneum is typically a surgical emergency, particularly in neonates. However, pneumoperitoneum can rarely present without gastrointestinal perforation which is known as spontaneous pneumoperitoneum.

Aims:

This study aims to analyze the outcome of pediatric patients with spontaneous pneumoperitoneum and describe our experience.

Settings and Design:

A retrospective study performed from January 2014 to May 2017.

Materials and Methods:

The study included all pediatric patients admitted in a tertiary care institute.

Results:

There were 9 patients with 5 males and 4 females, out of which 7 were neonates. At presentation, respiratory distress was a common complaint (8/9). 5 out of all patients developed abdominal distension. Associated malformations were seen in 5 patients. Pneumoperitoneum was preceded by mechanical ventilation in 5 patients. Abdominal examination revealed soft distension with relaxed abdominal wall in 7, while marked distension was present in 2 cases. Features suggestive of peritonitis were absent in all the patients. Abdominal radiographs revealed free air in all, while, radiographic evidence of pneumothorax was seen in 2 patients. Conservative management without any operative intervention was performed in 3 patients with favorable outcome. Laparotomy was performed in 1 patient; negative for any perforation and outcome was unfavorable. In 5 patients, abdominocentesis was performed followed by abdominal drain placement. No patient had any evidence of leakage of intestinal contents from gastrointestinal tract after insertion of abdominal drain. Favorable outcome was present in 5 patients. Out of 4 cases with unfavorable outcome, 3 patients were having esophageal atresia.

Conclusions:

A high index of suspicion for spontaneous pneumoperitoneum must be present when dealing with pediatric patients, especially neonates with pneumoperitoneum and without clinical signs of peritonitis. A comprehensive clinical evaluation with sepsis screen must be carried out to supplement the diagnosis. Pneumoperitoneum in pediatric patients, especially neonates, is not always an absolute indication for surgery.

Pneumoperitoneum without Intestinal Perforation in a Neonate: Case Report and Literature Review

Pneumoperitoneum in a preterm neonate usually indicates perforation of the intestine and is considered a surgical emergency. However, there are cases of pneumoperitoneum with no evidence of rupture of the intestine reported in the literature. We report a case of pneumoperitoneum with no intestinal perforation in a preterm neonate with respiratory distress syndrome who was on high frequency oscillatory ventilation (HFOV). He developed bilateral pulmonary interstitial emphysema with localized cystic lesion, likely localized pulmonary interstitial emphysema, and recurrent pneumothoraces. He was treated with dexamethasone to wean from the ventilator. Pneumoperitoneum developed in association with left sided pneumothorax following mechanical ventilation and cardiopulmonary resuscitation. Pneumoperitoneum resolved after the pneumothorax was resolved with chest tube drainage. He died from acute cardiorespiratory failure. At autopsy, there was no evidence of intestinal perforation. This case highlights the fact that pneumoperitoneum can develop secondary to pneumothorax and does not always indicate intestinal perforation or require exploratory laparotomy.

Perinatal risk factors in newborns with gastrointestinal perforation

AIM

To investigate correlation of perinatal risk factors in newborns with gastrointestinal perforation (GIP).

METHODS

Single-center retrospective cohort study was conducted between January 1990 and December 2012. Medical records on all newborns with GIP were reviewed (n = 35). Surgical records and histopathologic examination of all perforated intestine samples were also reviewed.

RESULTS

The most common cause of GIP was necrotizing enterocolitis (51.4%). The most common site of perforation was large intestine. Mortality rate was 31%. Infants with GIP more frequently had very low birth weight (< 1500 g), especially birth weight below 10^th percentile according to gestational age. Ponderal index was not differing between infants with GIP and control subjects. In infants with GIP anemia was more frequently found than in control group.

CONCLUSION

GIP in newborns is mostly disease of infants with birth weight below 10^th percentile according to gestational age. GIP occurs more often in infants with anemia.

Diagnosis and treatment of pediatric benign pneumoperitoneum: A case report series of 9 patients

INTRODUCTION

Benign pneumoperitoneum (BPPT) is defined as asymptomatic free intraabdominal air or as pneumoperitoneum without peritonitis. Symptomatic free air requires surgical anagement, but management of asymptomatic pneumoperitoneum is controversial. In this study, we investigate the diagnosis and treatment of BPPT in children.

CLINICAL FINDINGS

The clinical data of 9 pediatric patients with BPPT who were admitted to our hospital from January 2000 to January 2015 were retrospectively analyzed to summarize the diagnosis and treatment. Overall, 9 cases were included with 8 males and 1 female, aged from 4 days to 4 years. Among them there were 6 newborns (including 1 premature infant). Patients were all admitted to hospital with the major clinical symptom of abdominal distension, including 2 cases accompanied by tachypnea, 2 cases with vomiting, 1 case with diarrhea, and 2 cases with fever. No previous constipation or obstructive defecation existed. Six newborns had meconium defecation within 24 hours after birth. Physical examination revealed all patients with relaxed abdominal wall except 1 patient with abdominal distension had slight muscle stiffness and hyperactive bowel sounds. Abdominal X-ray suggested free air under the diaphragm in all cases.

INTERVENTIONS/OUTCOMES

All patients except for one case of laparotomy were conservatively treated and cured with fasting, infection prevention, rehydration, abdominocentesis, and close observation. Nine cases of patients were all discharged with no death occurrence. After discharge follow-up of 7 months to 6 years was conducted. There was no recurrence of similar symptoms, and children were in good growth and development.

CONCLUSION

The diagnosis of BPPT mainly relies on clinical symptoms in patient, careful abdominal examination, abdominal X-ray combined with abdominocentesis, and the exclusion of gastrointestinal perforation for confirmation. Conservative treatment can cure the disease. Attention should be paid to distinguish with surgical pneumoperitoneum to avoid unnecessary surgical exploration.

Benign pneumoperitoneum in newborns: which abdomen to open and which one to observe?

Benign pneumoperitoneum in newborns is not a rare condition that should be managed conservatively. Neonatologists and surgical teams should work together to avoid unnecessary and potentially risky procedures.

Neonatal Sigmoid Colon Perforation: A Rare Occurrence in Low Anorectal Malformation and Review of the Literature

Gastrointestinal perforation in neonates with anorectal malformation (ARM) is extremely uncommon. Delayed patient presentation is an important causative factor. A 2.5-kg neonate presented 72 hours after birth with abdominal distention and absent anal opening with meconium pearls. An abdominal X-ray revealed the presence of free gas. After adequate resuscitation patient underwent surgery. Closure of the sigmoid colon perforation with a proximal diverting loop colostomy with anoplasty was done. The literature reveals only two cases of sigmoid colon perforation with low ARM. Ours is the third case, in whom repair of the perforation and correction of the ARM was managed successfully at the same time.

Pneumoperitoneum in in-vitro Conceived Quadruplet Neonate: Rare Manifestation of Hirschsprung's Disease--Report of a Case

INTRODUCTION

Hirschsprung's disease is a congenital colonic aganglionosis, usually presented as inability or difficulty in passing of meconium, chronic and persistent obstipation, maleficent feeding, vomiting, distension and lethargy.

CASE PRESENTATION

We presented a case of an in-vitro conceived quadruplet premature neonate who presented with pneumoperitoneum caused by transverse colon spontaneous perforation and microcolon appearance of distal bowel, treated by resection and temporary colostomy turns to be a rare manifestation of Hirschsprung's disease.

CONCLUSION

Assisted reproductive technologies increases chances for multiple pregnancies and may increase chance for major congenital anomalies. Rare manifestation of Hirschsprung's disease is spontaneous pneumoperitoneum which remains a surgical emergency. Delay in recognizing and treatment can significantly worsen prognosis. In neonate with intestinal perforation one should consider Hirschsprung's disease.

Neonatal colonic perforation

Neonatal colonic perforation is a rarely seen condition. Plain abdominal radiography of a 28-hour newborn consulted for vomiting and bloody stool revealed the presence of subdiaphragmatic free air, which necessitated surgical exploration. Transverse colonic perforation was detected during the exploration, and subsequently, a colostomy and appendectomy were performed. The postoperative follow-up period was uneventful. Necrotizing enterocolitis, Hirschsprung disease, and mechanical obstruction are some of the causes of colonic perforation during the neonatal period. Herein, we have shared a case of colonic perforation in an asphyctic newborn delivered after prolonged labor.

Intestinal muscularis propria increases in thickness with corrected gestational age and is focally attenuated in patients with isolated intestinal perforations

PURPOSE

Intestinal perforations are common in premature infants, leading to a diagnostic dilemma between necrotizing enterocolitis and isolated intestinal perforation (IIP). IIP is thought to result from a congenital or acquired absence of the muscularis propria. However, developmental events leading to IIP are not well understood. This study examines the relationship between corrected gestational age (CGA) and intestinal muscle development in controls and patients with IIP.

METHODS

Specimens from stillbirths and infants undergoing intestinal surgery from 8 to 48weeks' CGA were collected from 2005 to 2012. Twelve patients with IIP were identified. Control specimens were collected during 25 fetal autopsies and 39 bowel resections. In each case, three sections of intestine were examined histologically for muscularis mucosa, circular and longitudinal muscle thickness. Comparisons of control and perforated specimens were performed via linear regression and ANOVA.

RESULTS

Controls and adjacent normal segments in IIP showed a linear relationship between thickness of circular and longitudinal muscles with CGA. Circular and longitudinal muscles were thinner in perforated segments than in adjacent normals and CGA-matched controls (p<0.05).

CONCLUSION

Intestinal muscularis propria increases in thickness with CGA. Muscle thickness is focally attenuated in patients with isolated intestinal perforations, while the remaining intestine is normal, suggesting that primary repair is an appropriate treatment.

Neonatal pneumoperitoneum and meconium-stained peritoneal fluid of uncertain cause

A 2-day-old male infant was referred to hospital because he was continually moaning. Massive pneumoperitoneum was observed on plain radiographs on the day of admission. This case is unique in that the massive pneumoperitoneum with meconium-stained peritoneal fluid was not associated with any evidence of bowel perforation seen on laparotomy.

A case of congenital infantile fibrosarcoma of sigmoid colon manifesting as pneumoperitoneum in a newborn

Congenital infantile fibrosarcoma (CIF) is a rare soft-tissue tumor in the pediatric age group and seldom involves the gastrointestinal tract. A 2-day-old boy was transferred to our hospital with a pneumpoperitoneum. After emergency operation, we could find a solid mass wrapping around a sigmoid colon and performed a segmental resection of sigmoid colon including a mass. Histopathologic examination showed an infantile fibrosarcoma origining from the muscular layer of colon. The baby was discharged on the 17th hospital day and followed for 1 yr without recurrence.

Spontaneous perforation of the colon and rectum complicating anorectal malformations in neonates

BACKGROUND

Spontaneous perforation of the colon is a rare complication in neonates with anorectal malformations (ARMs). There are no detailed studies concerning this complication.

MATERIALS AND METHODS

A retrospective review of hospital records between 1994 and 2010 revealed 8 cases of bowel perforation among 136 cases of ARM. Eighteen additional cases were culled from the literature by searching Pubmed, Indmed, Embase, and Google Scholar.

RESULTS

Perforations occurred more commonly in males with ARM (85%). Low and high anomalies were equally affected. The median age at diagnosis was 48 hours. Pneumoscrotum and abdominal wall erythema were occasionally suggestive of perforation. In addition to the Rigler sign and collapsed bowel on plain radiographs, a newly described "rectal-tail sign" was useful in recognizing pneumoperitoneum in the lateral view invertogram. A lower midline incision offered optimal surgical access. Two distinct patterns of perforation were identified: type 1 (88%) occurred before surgical decompression of the obstructed colon, whereas type 2 (12%) occurred postoperatively. Type 1 cases were subdivided into cecal (type 1a, 16%), transverse colon (type 1b, 8%), rectosigmoid (type 1c, 60%), and miscellaneous (type 1d, 4%) perforations. Type 1a is best treated with cecostomy and distal colostomy; type 1b, with exteriorization of the perforation; and types 1c and 1d, with closure of the perforation and proximal colostomy. Dense fibrous adhesions caused by extravasated meconium posed technical difficulty during the definitive pull-through operation and was responsible for considerable morbidity. The overall mortality was 19%.

CONCLUSIONS

Colorectal perforation is associated with considerable morbidity and mortality in neonates with ARM. Radiographs rather than clinical examination should be relied on for diagnosis of bowel perforation in ARM. Treatment options are chosen according to the subtype of perforation. Because most perforations occurred more than 24 hours after birth, early referral and surgical decompression of the colon may avoid this complication.