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  • Title: Distal catheter obstruction from non-infectious cause in ventriculo-peritoneal shunted children.
    Author: Arnell K, Olsen L.
    Journal: Eur J Pediatr Surg; 2004 Aug; 14(4):245-9. PubMed ID: 15343464.
    Abstract:
    In hydrocephalic children, ventriculo-peritoneal shunting is the preferred treatment with few complications. However, an obviously non-infectious peritoneal reaction to the cerebrospinal fluid (CSF) may occasionally lead to shunt malfunction. In eight hydrocephalic children, shunt malfunction with distal catheter complication was found with abdominal pseudocyst formation in seven cases and accumulation of the CSF in one. All children had a normal CSF cell count and glucose concentration, and white cell count, and C-reactive protein in peripheral blood were normal. No CSF infection could be detected despite prolonged aerobic and anaerobic cultures. After initial externalisation of the shunt and subsequent routine administration of antibiotics because infection initially was suspected, ventriculo-peritoneal shunting was attempted one to three times with identical failure before successful conversion to a ventriculo-atrial system. At laparotomy the peritoneum and intestinal serosa were hyperaemic and oedematous in all patients, five of whom also had pseudocysts and two of whom also had intra-abdominal adhesions. Four children had a revision 6-24 years after the ventriculo-atrial conversion due to short atrial catheter with distal obstruction. In three of them, the distal catheter was successfully replaced into the peritoneal cavity. The fourth child, however, developed an infectious abdominal pseudocyst with adhesions due to a then undetected Propionibacterium acnes infection. After externalisation and antibiotics, a new ventriculo-atrial shunt was inserted. At follow-up between 5 months to nearly 6 years later, the three children with peritoneal catheters did not show any signs of shunt malfunction or abdominal problems. Thus hydrocephalic children may develop shunt malfunction with distal catheter obstruction due to a still unexplained, transient, non-infectious peritoneal reaction leading to abdominal pseudocyst formation or accumulation of CSF. In some children, however, it may later be possible to replace the distal catheter into the peritoneal cavity, if no infection is involved.
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