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Cerebral Lactate Correlates with Early Onset Pneumonia after Aneurysmal SAH.
MedLine Citation:
PMID:  24323715     Owner:  NLM     Status:  Publisher    
Pneumonia is a significant medical complication following aneurysmal subarachnoid hemorrhage (aSAH). The aSAH may initiate immune interactions leading to depressed immunofunction, followed by an increased risk of infection. It remains unclear as to whether there is a possible association between cerebral metabolism and infections. Clinical and microdialysis data from aSAH patients prospectively included in the CoOperative Study on Brain Injury Depolarisations protocol Berlin were analyzed. Levels of glucose, lactate, pyruvate, and glutamate were measured hourly using microdialysis in the cerebral extracellular fluid. The occurrence of pneumonia (defined by positive microbiological cultures) and delayed ischemic neurological deficits (DIND) was documented prospectively. Eighteen aSAH patients (52.7 ± 10.7 years), classified according to the World Federation of Neurological Surgeons in low (I-III, n = 9) and high (IV-V, n = 9) grades, were studied. Eight patients (45 %) experienced DIND, 10 patients (56 %) pneumonia (mean onset day 2.6). Lactate was elevated at day 3 in infected patients (n = 9, median = 6.82 mmol/L) vs. patient without infections (n = 6, median = 2.90 mmol/L, p = 0.036). The optimum cut-off point to predict pneumonia at day 3 was 3.57 mmol/L with a sensitivity of 0.77, and a specificity of 0.66 (area under curve was 0.833 with p = 0.034). Lactate at day 7 was higher in DIND patients compared to no-DIND-patients (p = 0.016). Early elevated lactate correlated with occurrence of bacterial pneumonia, while late elevations with DIND after aSAH. Future investigations may elucidate the relationship between cerebral lactate and markers of immunocompetence and more detailed to identify patients with higher susceptibility for infections.
S Radolf; N Smoll; C Drenckhahn; J P Dreier; P Vajkoczy; A S Sarrafzadeh
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Publication Detail:
Type:  JOURNAL ARTICLE     Date:  2013-10-17
Journal Detail:
Title:  Translational stroke research     Volume:  -     ISSN:  1868-601X     ISO Abbreviation:  Transl Stroke Res     Publication Date:  2013 Oct 
Date Detail:
Created Date:  2013-12-10     Completed Date:  -     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  101517297     Medline TA:  Transl Stroke Res     Country:  -    
Other Details:
Languages:  ENG     Pagination:  -     Citation Subset:  -    
Department of Neurosurgery, Charité - Universitätsmedizin Berlin, Berlin, Germany.
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