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Infections of cerebrospinal fluid shunts: epidemiology, clinical manifestations, and therapy
Insights
Cerebrospinal fluid shunt infections in hydrocephalic patients are common, occurring in 27% of cases. Prompt removal of infected shunts with antibiotics is crucial for survival.
Area of Science:
- Neurosurgery
- Infectious Diseases
- Pediatric Medicine
Background:
- Hydrocephalus affects numerous pediatric patients, often requiring cerebrospinal fluid (CSF) shunts.
- Shunt infections represent a significant complication, impacting patient outcomes and mortality.
- Understanding infection patterns is vital for improving management strategies.
Purpose of the Study:
- To determine the incidence and characteristics of shunt infections in pediatric hydrocephalic patients.
- To evaluate the efficacy of different treatment modalities for shunt infections.
- To identify risk factors and potential sources of shunt infections.
Main Methods:
- Retrospective analysis of 289 hydrocephalic patients undergoing CSF shunt insertion over a 10-year period.
- Categorization of infection rates by shunt type and causative organisms.
- Comparison of treatment outcomes for infected shunts, including surgical removal and antibiotic therapy.
Main Results:
- A 27% infection rate was observed in patients with CSF shunts.
- Staphylococcus epidermidis and Staphylococcus aureus were the most common pathogens.
- Shunt removal with systemic antibiotics proved effective, while antibiotics alone were largely ineffective and increased mortality.
- Infection significantly increased mortality from 17% to 40%.
Conclusions:
- CSF shunt infections are a major cause of increased mortality in hydrocephalic patients.
- Perioperative contamination is the likely source of infection, as indicated by infection clustering.
- Effective management involves prompt shunt removal and antibiotic administration; further research into prophylactic measures is warranted.
Abstract:
During a 10-year period shunt infections occurred in 27% of the 289 hydrocephalic patients who had cerebrospinal fluid shunts inserted at Children's Hospital Medical Center. The rate of infection did not vary with the type of shunt. Staphylococcus epidermidis and Staphylococcus aureus were responsible for one-half and one-quarter of the infections, respectively. Removal of the infected shunt in conjunction with administration of systemic antibiotics was effective therapy. Use of systemic antibiotics alone was generally ineffective and was associated with an increased mortality rate. Infection itself was a significant risk factor, raising the mortality rate from 17% to 40%. Clustering of infection within two months of surgery and similar rates of infection for ventriculo-atrial and ventriculo-peritoneal shunts indicate that the infecting organisms are usually introduced during the perioperative period. The possibility that prophylactic antibiotics or different shunt materials might reduce the infection rate requires further study.