Does release of antimicrobial agents from impregnated external ventricular drainage catheters affect the diagnosis of ventriculitis?
OBJECT Recently concern has arisen over the effect of released antimicrobial agents from antibiotic-impregnated external ventricular drainage (EVD) catheters on the reliability of CSF culture for diagnosis of ventriculitis. The authors designed a laboratory study to investigate this possibility,...
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| Format: | Article |
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American Association of Neurological Surgeons
2015
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| Online Access: | https://eprints.nottingham.ac.uk/45050/ |
| _version_ | 1848797057924464640 |
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| author | Bayston, Roger Ashraf, Waheed Ortori, Catherine |
| author_facet | Bayston, Roger Ashraf, Waheed Ortori, Catherine |
| author_sort | Bayston, Roger |
| building | Nottingham Research Data Repository |
| collection | Online Access |
| description | OBJECT
Recently concern has arisen over the effect of released antimicrobial agents from antibiotic-impregnated external ventricular drainage (EVD) catheters on the reliability of CSF culture for diagnosis of ventriculitis. The authors designed a laboratory study to investigate this possibility, and to determine whether there was also a risk of loss of bacterial viability when CSF samples were delayed in transport to the laboratory.
METHODS
Three types of commercially available antibiotic-impregnated EVD catheters were perfused with a suspension of bacteria (Staphylococcus epidermidis) over 21 days. Samples were analyzed for bacterial viability and for concentrations of antibiotics released from the catheters. The authors also investigated the effect on bacterial viability in samples stored at 18°C and 4°C to simulate delay in CSF samples reaching the laboratory for analysis.
RESULTS
Bacterial viability was significantly reduced in all 3 catheter types when sampled on Day 1, but this effect was not observed in later samples. The results were reflected in stored samples, with significant loss of viability in Day 1 samples but with little further loss of viable bacteria in samples obtained after this time point. All samples stored for 18 hours showed significant loss of viable bacteria.
CONCLUSIONS
While there were differences between the catheters, only samples taken on Day 1 showed a significant reduction in the numbers of viable bacteria after passing through the catheters. This reduction coincided with higher concentrations of antimicrobial agents in the first few hours after perfusion began. Similarly, bacterial viability declined significantly after storage of Day 1 samples, but only slightly in samples obtained thereafter. The results indicate that drugs released from these antimicrobial catheters are unlikely to affect the diagnosis of ventriculitis, as sampling for this purpose is not usually conducted in the first 24 hours of EVD. |
| first_indexed | 2025-11-14T19:57:50Z |
| format | Article |
| id | nottingham-45050 |
| institution | University of Nottingham Malaysia Campus |
| institution_category | Local University |
| last_indexed | 2025-11-14T19:57:50Z |
| publishDate | 2015 |
| publisher | American Association of Neurological Surgeons |
| recordtype | eprints |
| repository_type | Digital Repository |
| spelling | nottingham-450502020-05-04T17:10:49Z https://eprints.nottingham.ac.uk/45050/ Does release of antimicrobial agents from impregnated external ventricular drainage catheters affect the diagnosis of ventriculitis? Bayston, Roger Ashraf, Waheed Ortori, Catherine OBJECT Recently concern has arisen over the effect of released antimicrobial agents from antibiotic-impregnated external ventricular drainage (EVD) catheters on the reliability of CSF culture for diagnosis of ventriculitis. The authors designed a laboratory study to investigate this possibility, and to determine whether there was also a risk of loss of bacterial viability when CSF samples were delayed in transport to the laboratory. METHODS Three types of commercially available antibiotic-impregnated EVD catheters were perfused with a suspension of bacteria (Staphylococcus epidermidis) over 21 days. Samples were analyzed for bacterial viability and for concentrations of antibiotics released from the catheters. The authors also investigated the effect on bacterial viability in samples stored at 18°C and 4°C to simulate delay in CSF samples reaching the laboratory for analysis. RESULTS Bacterial viability was significantly reduced in all 3 catheter types when sampled on Day 1, but this effect was not observed in later samples. The results were reflected in stored samples, with significant loss of viability in Day 1 samples but with little further loss of viable bacteria in samples obtained after this time point. All samples stored for 18 hours showed significant loss of viable bacteria. CONCLUSIONS While there were differences between the catheters, only samples taken on Day 1 showed a significant reduction in the numbers of viable bacteria after passing through the catheters. This reduction coincided with higher concentrations of antimicrobial agents in the first few hours after perfusion began. Similarly, bacterial viability declined significantly after storage of Day 1 samples, but only slightly in samples obtained thereafter. The results indicate that drugs released from these antimicrobial catheters are unlikely to affect the diagnosis of ventriculitis, as sampling for this purpose is not usually conducted in the first 24 hours of EVD. American Association of Neurological Surgeons 2015-06-12 Article PeerReviewed Bayston, Roger, Ashraf, Waheed and Ortori, Catherine (2015) Does release of antimicrobial agents from impregnated external ventricular drainage catheters affect the diagnosis of ventriculitis? Journal of Neurosurgery, 124 (2). pp. 375-381. ISSN 1933-0693 http://thejns.org/doi/10.3171/2014.12.JNS141900 doi:10.3171/2014.12.JNS141900 doi:10.3171/2014.12.JNS141900 |
| spellingShingle | Bayston, Roger Ashraf, Waheed Ortori, Catherine Does release of antimicrobial agents from impregnated external ventricular drainage catheters affect the diagnosis of ventriculitis? |
| title | Does release of antimicrobial agents from impregnated external ventricular drainage catheters affect the diagnosis of ventriculitis? |
| title_full | Does release of antimicrobial agents from impregnated external ventricular drainage catheters affect the diagnosis of ventriculitis? |
| title_fullStr | Does release of antimicrobial agents from impregnated external ventricular drainage catheters affect the diagnosis of ventriculitis? |
| title_full_unstemmed | Does release of antimicrobial agents from impregnated external ventricular drainage catheters affect the diagnosis of ventriculitis? |
| title_short | Does release of antimicrobial agents from impregnated external ventricular drainage catheters affect the diagnosis of ventriculitis? |
| title_sort | does release of antimicrobial agents from impregnated external ventricular drainage catheters affect the diagnosis of ventriculitis? |
| url | https://eprints.nottingham.ac.uk/45050/ https://eprints.nottingham.ac.uk/45050/ https://eprints.nottingham.ac.uk/45050/ |