title: Hyperbaric oxygen therapy prevents coagulation disorders in an experimental model of multiple organ failure syndrome.
abstract: OBJECTIVE
  To evaluate the effects of hyperbaric oxygen (HBO) therapy on the coagulation cascade using an experimental model of multiple organ failure syndrome (MOFS).
  
  
  METHODS
  MOFS was induced by zymosan (500mg/kg i.p.) in rats. HBO therapy (2ATA) was administered in a cylindrical steel chamber 4 and 11h after zymosan administration. In a separate set of experiments animals were monitored for 72h, and systemic toxicity was scored.
  
  
  METHODS
  Eighteen hours after zymosan administration, rats were killed and blood samples were used for analysis of hemocoagulative parameters, hemodynamics, and arterial blood gas.
  
  
  RESULTS
  Zymosan administration caused MOFS by affecting the coagulation cascade, as shown by a significant increase in plasma levels of fibrinogen, tissue plasminogen activator, inhibitor of tissue plasminogen activator of type 1, and plasma levels of fibrin degradation products vs. control rats. Zymosan-induced MOFS was also characterized by a significant increase in von Willebrand antigen plasma levels vs. controls. Moreover, zymosan administration induced a significant fall in mean arterial blood pressure and alteration in blood gas values. HBO therapy significantly reduced the derangements of coagulation cascade, the fall in mean blood pressure and alteration in blood gas induced by zymosan administration.
  
  
  CONCLUSIONS
  The hypercoagulability induced by zymosan could be responsible for organ failure and death. Our data demonstrate that HBO therapy significantly prevents the alteration in the coagulation cascade and arterial blood gas in an experimental model of MOFS.
authors.affiliation: Department of Experimental Medicine, Section of Pharmacology L. Donatelli, Faculty of Medicine, Second University of Naples, via Michele Tenore 14, 80137, Naples, Italy. francesco.imperatore@fastwebnet.it
authors.forename: Francesco
authors.initials: F
authors.lastname: Imperatore
authors.forename: Salvatore
authors.initials: S
authors.lastname: Cuzzocrea
authors.forename: Domenico
authors.initials: D
authors.lastname: De Lucia
authors.forename: Marcella
authors.initials: M
authors.lastname: Sessa
authors.forename: Barbara
authors.initials: B
authors.lastname: Rinaldi
authors.forename: Annalisa
authors.initials: A
authors.lastname: Capuano
authors.forename: Giovanni
authors.initials: G
authors.lastname: Liguori
authors.forename: Amelia
authors.initials: A
authors.lastname: Filippelli
authors.forename: Francesco
authors.initials: F
authors.lastname: Rossi
mesh_terms: D000818:Animals; D001778:Blood Coagulation Disorders / Q000517:prevention & control*; D006931:Hyperbaric Oxygenation; D008297:Male; D009102:Multiple Organ Failure / Q000628:therapy*; D011897:Random Allocation; D051381:Rats; D017207:Rats, Sprague-Dawley; D016019:Survival Analysis; D015054:Zymosan
chemical_list: D015054:Zymosan