Abstract
The Consistency Of The Determination Of A-V Fistula Recirculation (R) Using The Thermodilution Method (T) With A New Probe (Blood Temperature Monitor, Btm Fresenius A.G.) Was Studied In 32 Patients (Avf: Proximal 34%, Distal 63%, Graft 3%). We Compared R Calculated By T With Both The Traditional Three-Sample Method (C) And The Low-Flow Three-Sample Method (L); Both Bun And Creatinine (Cr) Were Measured In All Samples At The Beginning And At The End Of The Session. T Was Also Determined At The 2Nd And 3Rd Hour. There Was A Significant Correlation Between T And Either C Or L At The Start Of The Session (Bun And Cr) As Well As At The End (Only Cr). R Was Higher (11.9±10) In Proximal Avf Than In The Distal (5+3.1%; P0.01) When Measured By T At The Same Blood Flow (Qb: 313±45 Vs 343+52 Mls/Min, P=Ns). T Increased But Not Significantly By Increasing Qb From 150 To 300 Mls/Min In Ten Patients. No Correlation Was Found During The Session Between Blood Pressure And T Variations. In Conclusion, T And L Give Very Similar Results While C Overestimates Recirculation. R Is Easy To Perform Repeteadly By T With Results Available Online.
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