title: Hypothermic reconditioning by gaseous oxygen persufflation after cold storage of porcine kidneys.
abstract: BACKGROUND
  Delayed graft function still represents a major complication in clinical kidney transplantation. Here we tested the possibility to improve functional outcome of cold stored kidneys a posteriori by hypothermic reconditioning using retrograde oxygen persufflation (ROP) immediately prior to reperfusion.
  
  
  METHODS
  Kidneys from female German Landrace pigs were flushed with Histidine-Tryptophan-Ketoglutarate (HTK) solution and cold-stored for 18 h (control). Some grafts were subsequently subjected to 90 min of retrograde oxygen persufflation (ROP) via the renal vein during cold preservation. Early graft function of all kidneys was assessed thereafter by warm reperfusion in vitro (n=6, resp.).
  
  
  RESULTS
  Renal function upon reperfusion was significantly enhanced by ROP with an approximately twofold increase in renal clearances of creatinine and urea. ROP also led to higher renal vascular flow rates, enhanced urine output and mitigated histological alterations.
  
  
  CONCLUSIONS
  It is concluded that initial graft function can be improved by 90 min of hypothermic gaseous oxygenation after arrival of the preserved organ in the transplantation clinic.
authors.affiliation: Surgical Research Division, University Clinic of Surgery, Bonn, Germany. minor@uni-bonn.de
authors.forename: Thomas
authors.initials: T
authors.lastname: Minor
authors.forename: Patrik
authors.initials: P
authors.lastname: Efferz
authors.forename: Bastian
authors.initials: B
authors.lastname: Lüer
mesh_terms: D000818:Animals; D003080:Cold Temperature; D003404:Creatinine / Q000378:metabolism; D005260:Female; D006085:Graft Survival; D007036:Hypothermia, Induced / Q000379:methods*; D007668:Kidney / Q000378:metabolism*; D016030:Kidney Transplantation / Q000379:methods*; D009926:Organ Preservation / Q000379:methods*; D010100:Oxygen / Q000008:administration & dosage*; D010477:Perfusion / Q000379:methods; D013552:Swine; D016896:Treatment Outcome
chemical_list: D003404:Creatinine; D010100:Oxygen