title: Development of venovenous extracorporeal blood purification circuits in rodents for sepsis.
abstract: BACKGROUND
  Unlike pharmacologic interventions in sepsis, extracorporeal blood purification, which is widely used in septic patients, is not typically studied in experimental rodents. Most of the previous studies have performed extracorporeal blood purification in larger animals and typically use arteriovenous (AV) vascular access. We developed a venovenous (VV) purification model in the rat as an adjunct for the treatment of sepsis.
  
  
  METHODS
  Using adult male Sprague-Dawley rats, we cannulated the femoral artery or vein and the jugular vein with P50 tubing and created an AV or VV circuit. Blood flow was maintained by arterial pressure in the AV circuit, whereas in the VV circuit the blood flow was regulated using a rotary pump. The safety of this circuit was evaluated using the changes of blood interleukin 6, rectal temperature, and 7-d survival with sham extracorporeal circulation (circuit connection without treatment) compared with the control (without circuit). The main side complications of this VV circuit were compared with those of the AV circuit.
  
  
  RESULTS
  The differences in interleukin 6, body temperature, and cumulative survival were not statistically significant after extracorporeal circulation. The main complications of extracorporeal circulation occurred less often with VV compared with AV therapy: massive bleeding (2.5% versus 15%, P = 0.04); clot formation (2.5% versus 15%, P = 0.04). This VV circuit has been successfully used in different septic rodent models with different techniques (hemoadsorption and hemofiltration).
  
  
  CONCLUSIONS
  VV blood purification in a rodent model appears to be effective and is safer than AV circuit.
authors: The CRISMA (Clinical Research, Investigation, and Systems Modeling of Acute Illness) Center, Department of Critical Care Medicine, University of Pittsburgh School of Medicine, Pittsburgh, Pennsylvania. Electronic address: pengzy5@hotmail.com.
authors: Zhi-Yong
authors: ZY
authors: Peng
authors: Jicheng
authors: J
authors: Zhang
authors: Thomas
authors: T
authors: Rimmelé
authors: Feihu
authors: F
authors: Zhou
authors: Anan
authors: A
authors: Chuasuwan
authors: A Murat
authors: AM
authors: Kaynar
authors: John A
authors: JA
authors: Kellum
mesh_terms: D000818:Animals; D016470:Bacteremia / Q000097:blood / Q000401:mortality / Q000628:therapy; D001831:Body Temperature; D002404:Catheterization / Q000379:methods; D004195:Disease Models, Animal; D004731:Endotoxins / Q000633:toxicity; D004927:Escherichia coli Infections / Q000097:blood / Q000401:mortality / Q000628:therapy; D005263:Femoral Artery; D006440:Hemofiltration / Q000295:instrumentation / Q000379:methods*; D006801:Humans; D015850:Interleukin-6 / Q000097:blood; D007601:Jugular Veins; D008297:Male; D051381:Rats; D017207:Rats, Sprague-Dawley; D018805:Sepsis / Q000097:blood / Q000401:mortality / Q000628:therapy*; D016060:Sorption Detoxification / Q000295:instrumentation / Q000379:methods*
chemical_list: D004731:Endotoxins; D015850:Interleukin-6
keywords: Animal model; Apheresis; Hemofiltration; Rat; Sepsis
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