title: Coefficient of energy balance, a new parameter for basic investigation of the cerebrospinal fluid.
abstract: BACKGROUND
  The concentrations of glucose and lactate in cerebrospinal fluid (CSF) provide important information about energy metabolism in the CSF compartment. To improve our understanding of this information we introduced a new parameter resulting from a formula for calculating the fictitious production of adenosine triphosphate, i.e., the coefficient of energy balance (KEB).
  
  
  METHODS
  We evaluated cytology, the concentrations of glucose and lactate and the KEB in the CSF of 948 patients, who were divided into five groups. For statistical analysis we used the Kruskal-Wallis test with post-hoc analysis using the Dunn method and multinomial regression analysis. We determined the specificities and sensitivities of the cytological pictures and the KEB.
  
  
  RESULTS
  A KEB>28.0 corresponded to normal energy metabolism in the CSF. A KEB<28.0 corresponded to an increased level of anaerobic metabolism in the CSF during inflammation in the CNS. A KEB<10.0 corresponded to a high level of anaerobic metabolism in the CSF during severe inflammation with an oxidative burst of professional phagocytes in the CNS. The KEB parameter increased the specificities of cytological examinations of the CSF in all cases.
  
  
  CONCLUSIONS
  The KEB represents an equation for calculating the fictitious average number of ATP molecules produced in the CSF compartment from one molecule of glucose, and we used it successfully as a new parameter for evaluating energy metabolism status in the CSF.
authors.forename: Petr
authors.initials: P
authors.lastname: Kelbich
authors.forename: Aleš
authors.initials: A
authors.lastname: Hejčl
authors.forename: Iva Selke
authors.initials: IS
authors.lastname: Krulichová
authors.forename: Jan
authors.initials: J
authors.lastname: Procházka
authors.forename: Eva
authors.initials: E
authors.lastname: Hanuljaková
authors.forename: Jitka
authors.initials: J
authors.lastname: Peruthová
authors.forename: Martina
authors.initials: M
authors.lastname: Koudelková
authors.forename: Martin
authors.initials: M
authors.lastname: Sameš
authors.forename: Jan
authors.initials: J
authors.lastname: Krejsek
mesh_terms: D000255:Adenosine Triphosphate / Q000096:biosynthesis; D002493:Central Nervous System Diseases / Q000134:cerebrospinal fluid / Q000175:diagnosis* / Q000276:immunology / Q000378:metabolism; D002555:Cerebrospinal Fluid / Q000737:chemistry* / Q000378:metabolism; D004734:Energy Metabolism; D005947:Glucose / Q000032:analysis* / Q000378:metabolism; D006801:Humans; D007249:Inflammation / Q000175:diagnosis / Q000276:immunology / Q000378:metabolism; D019344:Lactic Acid / Q000032:analysis* / Q000378:metabolism; D012044:Regression Analysis
chemical_list: D019344:Lactic Acid; D000255:Adenosine Triphosphate; D005947:Glucose