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External Ventricular Drains and Mortality in Patients with Severe Traumatic Brain Injury

Published online by Cambridge University Press:  02 December 2014

Donald E. G. Griesdale*
Affiliation:
Department of Anesthesiology, Pharmacology & Therapeutics, University of British Columbia & Program of Critical Care Medicine, Vancouver General Hospital, Vancouver BC Department of Anesthesia, University of British Columbia & Program of Critical Care Medicine, Vancouver General Hospital, Vancouver BC Department of Medicine, Division of Critical Care Medicine, University of British Columbia & Program of Critical Care Medicine, Vancouver General Hospital, Vancouver BC
Jonathan McEwen
Affiliation:
Department of Anesthesiology, Pharmacology & Therapeutics, University of British Columbia & Program of Critical Care Medicine, Vancouver General Hospital, Vancouver BC Department of Anesthesia, University of British Columbia & Program of Critical Care Medicine, Vancouver General Hospital, Vancouver BC
Tobias Kurth
Affiliation:
Inserm Unit 708 Neuroepidemiology, University Pierre et Marie Currie, Paris, France Department of Epidemiology, Harvard School of Public Health & Division of Preventive Medicine, Brigham and Women's Hospital, Harvard Medical School, Boston, Massachusetts, USA
Dean R. Chittock
Affiliation:
Department of Medicine, Division of Critical Care Medicine, University of British Columbia & Program of Critical Care Medicine, Vancouver General Hospital, Vancouver BC
*
Critical Care Medicine, Vancouver General Hospital, Room 2438, Jim Pattison Pavilion, 2nd Floor, 855 West 12th Avenue, Vancouver British Columbia, V5Z 1M9, Canada.
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Abstract

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Purpose:

To determine our institutional adherence to the Brain Trauma Foundation guidelines with respect to intracranial pressure (ICP) monitoring, and examine the relationship between external ventricular drain (EVD) use and mortality.

Materials & Methods:

Retrospective cohort study of 171 patients with severe traumatic brain injury (TBI). Propensity score adjusted logistic regression was used to model the association between EVD use and mortality.

Results:

EVDs were inserted in 98 of 171 patients. Of the 73 patients without an EVD, 63 (86%) would have qualified for ICP monitoring under the current guidelines. EVDs were in situ for a median of 8 days (SD 6). In adjusted analyses, EVD use was associated with hospital mortality (OR 2.8, 95% CI: 1.1 - 7.1, p=0.04) and 28-day mortality (OR 2.1, 95% CI: 0.80 - 5.6, p=0.13). We observed significant modification of the association between EVD and 28-day mortality by GCS within 12 hours (p-interaction = 0.04), indicating strong association only among those patients with GCS score of at least 6 (OR 5.0, 95% CI: 1.5 - 16.7, p<0.01).

Conclusions:

The association of EVD with 28-day mortality was only apparent among patients with GCS score of ≥ 6. Further research is warranted to further refine which patients may benefit from ICP monitoring.

Résumé:

RÉSUMÉ:Objectif:

Cette étude visait à déterminer la fidélité de notre institution aux lignes directrices de la Brain Trauma Foundation concernant la surveillance de la pression intracrânienne (PIC) et à examiner la relation entre l'utilisation d'un drain ventriculaire externe (DVE) et la mortalité.

Matériels et méthodes:

Il s'agit d'une étude rétrospective portant sur une cohorte de 171 patients atteints de lésion cérébrale traumatique (LCT). Nous avons utilisé une analyse de régression logistique ajustée pour l'indice de tendance pour modéliser l'association entre l'utilisation d'un DVE et la mortalité.

Résultats:

Un DVE a été mis en place chez 98 des 171 patients. Parmi les 73 patients qui n'ont pas reçu de DVE, 63 patients (86%) auraient dû en recevoir un selon les lignes directrices actuelles. La médiane du temps pendant lequel le DVE a été laissé en place était de 8 jours (écart type de 6 jours). Les analyses ajustées ont montré que l'utilisation d'un DVE était associée à la mortalité hospitalière (RC 2,8; IC à 95% de 1,1 à 7,1; p = 0,04) et à la mortalité au cours des 28 premiers jours (RC 2,1; IC à 95% de 0,80 à 5,6; p = 0,13). Nous avons observé que l'association entre le DVE et la mortalité au cours des 28 premiers jours était modifiée significativement par le score à l'échelle de coma de Glasgow (SCG) dans les 12 premières heures (p-interaction = 0,04), ce qui indique une association importante seulement chez les patients dont le SCG était d'au moins 6 (RC 5,0; IC à 95% de 1,5 à 16,7; p < 0,01).

Conclusions:

L'association entre le DVE et la mortalité au cours des 28 premiers jours n'était évidente que chez les patients dont le SCG était de 6 ou plus. Il faudra effectuer d'autres recherches pour mieux définir quels patients sont susceptibles de bénéficier de la surveillance de la PIC.

Type
Research Article
Copyright
Copyright © The Canadian Journal of Neurological 2010

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