title: Relationship between laboratory findings and the outcome of cardiopulmonary arrest.
abstract: OBJECTIVE
  The aim of this study was to investigate whether laboratory findings on arrival may be useful in predicting the outcome of out-of-hospital cardiopulmonary arrest (CPA).
  
  
  METHODS
  Between January 2005 and September 2007, a medical chart review was retrospectively performed for CPA. The individual medical records were reviewed for the following data: background of CPA, arterial blood gas, cell blood count, serum biochemical, and cerebral performance category (CPC) 1 month after the CPA. The subjects were divided into patients with a CPC ranging from 3 to 5 (CPC 3-5 group) and from 1 to 2 (CPC 1-2 group).
  
  
  RESULTS
  The total protein, platelets, pH, and Po(2) in the CPC 1-2 group tended be higher than those in the CPC 3-5 group. The Pco(2), potassium, phosphorus, and ammonia in the CPC 1-2 group tended be lower than those in the CPC 3-5 group. However, there were no factors independently associated with the outcome by multivariate analysis.
  
  
  CONCLUSIONS
  Some of the biochemical-hematologic parameters demonstrate significant changes concerning the outcome. However, initial blood work cannot be used to make clinical decisions because there are no factors independently associated with the outcome.
authors.affiliation: Department of Traumatology and Critical Care Medicine, National Defense Medical College, Saitama, Japan. yanagawa@ndmc.ac.jp
authors.forename: Youichi
authors.initials: Y
authors.lastname: Yanagawa
authors.forename: Toshihisa
authors.initials: T
authors.lastname: Sakamoto
authors.forename: Hiroki
authors.initials: H
authors.lastname: Sato