Volume 54, Issue 1, Pages (July 1998)

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Presentation transcript:

Volume 54, Issue 1, Pages 268-274 (July 1998) The acu-men™: A new device for continuous renal replacement therapy in acute renal failure Markus Manns, Hans D. Polaschegg, Christian Schlaeper, Bernd Steinbach, Hans G. Evering Kidney International Volume 54, Issue 1, Pages 268-274 (July 1998) DOI: 10.1046/j.1523-1755.1998.00959.x Copyright © 1998 International Society of Nephrology Terms and Conditions

Figure 1 The acu-men;™ device with the cartridge inserted and door open. Kidney International 1998 54, 268-274DOI: (10.1046/j.1523-1755.1998.00959.x) Copyright © 1998 International Society of Nephrology Terms and Conditions

Figure 2 The acu-men;™ cartridge. Kidney International 1998 54, 268-274DOI: (10.1046/j.1523-1755.1998.00959.x) Copyright © 1998 International Society of Nephrology Terms and Conditions

Figure 3 Pneumatic blood pump. Kidney International 1998 54, 268-274DOI: (10.1046/j.1523-1755.1998.00959.x) Copyright © 1998 International Society of Nephrology Terms and Conditions

Figure 4 Operation of the acu-men™ machine in the continuous veno-venous hemofiltration mode. (A) Negative pressure cycle. The blood pump creates a negative pressure and blood runs from the patient to the blood pump. In the balancing chamber, valves 3 and 4 are closed and valves 5 and 6 are open, enabling replacement fluid to flow from the replacement fluid bag into the balancing chamber and filtrate to flow from the balancing chamber into the waste bag. The driving force is gravity, with the positive pressure from the height of the replacement fluid bag and the negative pressure from the depth of the waste bag. (B) Positive pressure cycle with 1:1 exchange. The blood pump creates a positive pressure that drives the blood through the filter and back to the patient. In the balancing chamber, valves 5 and 6 are closed and valves 3 and 4 are open. This enables production of filtrate through the filter into the balancing chamber, and flow of replacement fluid from the balancing chamber into the venous line of the extracorporeal circuit. The driving force is the filtrate pressure and the tension of the membrane. (C) Positive pressure cycle with fluid removal. The blood pump creates a positive pressure that drives the blood through the filter and back to the patient. In the balancing chamber, valves 5 and 4 are closed and valves 3 and 6 are open, enabling the production of filtrate through the filter into the balancing chamber. Since valve 4 is closed and valve 6 is open, the replacement fluid is pushed from the balancing chamber to the replacement fluid bag, and the filtrate is not replaced in this cycle. Kidney International 1998 54, 268-274DOI: (10.1046/j.1523-1755.1998.00959.x) Copyright © 1998 International Society of Nephrology Terms and Conditions

Kidney International 1998 54, 268-274DOI: (10. 1046/j. 1523-1755. 1998 Kidney International 1998 54, 268-274DOI: (10.1046/j.1523-1755.1998.00959.x) Copyright © 1998 International Society of Nephrology Terms and Conditions