Germain M, Steuer R, Miller D, Mulhern J, O'Shea M, Braden G
Simplified accurate measurement of access recirculation with an in-line hematocrit device
Am Soc Nephrol
J Am Soc Nephrol (abstract) (Nov) 6:489 1995

Measuring access recirculation should soon be quite easy with the variety of new methods being developed. In this paper, the optical hematocrit method is described. A hematocrit sensor on the arterial line is perturbed by a venous saline injection. If there is an early arterial peak, this signifies access recirculation. Not surprisingly, in 46 patients, the correlation between in-line hematocrit monitoring with saline dilution and urea methods of measuring recirculation was quite high; 7 of 46 patients had recirc > 20% by both methods, In the remainder recirculation was < 10%.

Comment: The in-line hematocrit sensing technology is being incorporated in the B. Braun dialysis machine line. (Daugirdas)

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Am Soc Nephrol
Basic hemodialysis : Vascular Access: graft/fistula
Basic hemodialysis : Dialysis machines

A slight correction the In Line Diagnostics Hct technology has been exclusively integrated in the Althin System 1000 and new System 1000 TINA Dialysis Delivery Systems available this summer.
Thomas D Kelly (
Portland , OR USA-Friday, July 11, 1997 at 16:06:10 (PDT)