Recirculation of blood in an extracorporeal blood treatment system
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United States of America Patent
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Jul 19, 2011
Grant Date -
Jul 12, 2007
app pub date -
May 31, 2006
filing date -
Jan 6, 2006
priority date (Note) -
In Force
status (Latency Note)
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Abstract
An extracorporeal blood treatment apparatus includes a blood treatment unit, a treatment fluid circuit, and a blood circuit. The treatment fluid circuit has a treatment fluid pump for circulating treatment fluid around the treatment fluid circuit and through the blood treatment unit. The blood circuit has a dual chamber blood pump for circulating blood around the blood circuit and through the blood treatment unit. An arterial line withdraws blood from a patient and delivers the withdrawn blood to the blood treatment unit. A venous line returns the treated blood to the patient. The arterial and venous lines can be switched between a first condition in which they are connected to the patient and a second condition in which they are disconnected from the patient and connected to each other for recirculation of blood through the blood circuit. A controller operates the blood pump, and switches the blood pump between a condition in which the dual chambers operate in phase with each other and a condition in which the dual chambers operate out of phase with each other.
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