Abstract
Spontaneous intestinal perforation (SIP) occurs commonly in extremely low birth weight (ELBW) infants. Our understanding of its etiologies has improved dramatically over the last decade. Included in this comprehension is an ongoing reconciliation of the iatrogenic risk factors, the microbiology, and the histopathology. The latter shows focal perforations with necrosis of the muscularis externa and no sign of ischemic damage (typically characterized by mucosal necrosis in the preterm bowel). Associations include extreme prematurity, early postnatal steroids (EPS), early use of indomethacin (EUI), and two common pathogens (Candida and Staphylococcus epidermis). Animal models of SIP suggest that all risk factors converge on a common collection of signaling pathways: those of nitric oxide synthases (NOS), insulin-like growth factors (IGFs), and epidermal growth factors (EGFs). Many of these factors skew trophism of the ileum (defined as thinning of the submucosa concomitant with hyperplasia of the muscosa). Global depletion of NOS is associated with disturbed intestinal motility and diminished transforming growth factor-alpha (TGF-α) in the muscularis externa. This constellation of insults seems to make the distal intestine vulnerable to perforation during recovery of motility.
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Abbreviations
- ELBW:
-
extremely low birth weight
- EUI:
-
early use of indomethacin
- EPD:
-
early postnatal dexamethasone
- EPS:
-
early postnatal steroids
- NEC:
-
necrotizing enterocolitis
- NSAID:
-
non-steroidal anti-inflammatory drug
- PDA:
-
patent ductus arteriosus
- RCT:
-
randomized controlled trial
- SIP:
-
spontaneous intestinal perforations
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Gordon, P. Understanding Intestinal Vulnerability to Perforation in the Extremely Low Birth Weight Infant. Pediatr Res 65, 138–144 (2009). https://doi.org/10.1203/PDR.0b013e31818c7920
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DOI: https://doi.org/10.1203/PDR.0b013e31818c7920
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