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Meconium obstruction in markedly premature infant
S K Greenholz1, C Perez, J R Wesley
1Division of Pediatric Surgery, Sutter Childrens Center, University of California Medical Center (Davis), Sacramento, USA.
Insights
Premature infants can develop intestinal obstruction from inspissated meconium, even without cystic fibrosis. Early diagnosis and intervention are crucial for managing this serious condition in neonates.
Area of Science:
- Neonatalogy
- Pediatric Surgery
- Gastroenterology
Background:
- Markedly premature infants are at risk for intestinal obstruction and perforation due to inspissated meconium.
- This condition can occur in the absence of cystic fibrosis.
Purpose of the Study:
- To review the clinical presentation, risk factors, and outcomes of intestinal obstruction caused by inspissated meconium in extremely premature infants.
- To highlight the importance of prompt diagnosis and intervention.
Main Methods:
- Retrospective review of 13 extremely premature infants treated for inspissated meconium obstruction between 1990 and 1994.
- Analysis of prenatal/postnatal risk factors, clinical presentation, surgical interventions, and outcomes.
Main Results:
- Average birth weight was 760g; obstruction/perforation occurred between days 2-17 of life.
- Twelve patients required surgery, with findings including meconium plugs, distension, and necrosis.
- Ten patients survived and were discharged, testing negative for cystic fibrosis; three died.
Conclusions:
- Inspissated meconium leading to obstruction and perforation is a significant risk in extremely premature infants, likely related to intestinal dysmotility.
- A high index of suspicion, careful examination, and radiographic screening are essential for timely diagnosis and management.
- Surgical intervention is often necessary, but non-operative management may be successful in select cases.
Abstract:
Markedly premature infants may present with intestinal obstruction and perforation secondary to inspissated meconium in the absence of cystic fibrosis. Between 1990 and 1994, 13 patients were treated for intestinal obstruction secondary to inspissated meconium. The average birth weight was 760 g. Prenatal and postnatal risk factors were identified, and included intrauterine growth retardation, maternal hypertension, prolonged administration of tocolytics, patent ductus arteriosus, hyaline membrane disease, and intraventricular hemorrhage. Stooling was absent or infrequent during the first 2 weeks of life. Surgical presentation consisted of distension and/or perforation between days 2 and 17 of life. Twelve patients required operative intervention. Findings invariably included one or more obstructing meconium plugs with proximal distension and frequent necrosis of the dilated segments. Surgical options consisted of resection or enterotomy, accompanied by primary closure or by distal irrigation and exteriorization. Irrigation led to iatrogenic bowel injury in two patients. One patient was managed successfully with oral and rectal gastrograffin and oral acetylcysteine. Ten patients were discharged, all of whom had normal stooling patterns and tested negatively for cystic fibrosis. Three patients died, two from the primary disease. The markedly premature infant is at risk for obstruction and eventual perforation secondary to meconium plugs, presumably formed in conjunction with intestinal dysmotility. Prompt diagnosis and timely intervention require a high index of suspicion, attention to stooling patterns and abdominal examinations, and screening radiographs when indicated.