Extracorporeal blood handling system with automatic flow control and methods of use
First Claim
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1. An apparatus for processing blood in an extracorporeal circuit, comprising:
- a venous line;
an arterial line;
a blood processing system having a pump, a filter having a gas collection plenum and an oxygenator, the blood processing system having an inlet to receive blood from a patient via the venous line and an outlet for reperfusing blood to the patient via the arterial line, the pump operably coupled to the filter to communicate suction to the venous line;
a sensor coupled to the gas collection plenum to detect the presence of air in the venous line or filter and generates an output; and
a controller programmed to modulate operation of a speed of the pump responsive to the output while retaining some forward flow through the arterial line to the patient.
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Abstract
Apparatus for processing blood in an extracorporeal circuit with automatic flow control is provided in which error conditions are sensed and system operation is modulated responsive to the error conditions. The apparatus includes an extracorporeal blood processing system, at least one sensor that senses the presence or absence of gas or monitors venous pressure, and a controller operably coupled to the blood processing system to selectively reduce pump speed or to reconfigure flow paths within the blood processing system responsive to the sensor output.
121 Citations
26 Claims
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1. An apparatus for processing blood in an extracorporeal circuit, comprising:
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a venous line;
an arterial line;
a blood processing system having a pump, a filter having a gas collection plenum and an oxygenator, the blood processing system having an inlet to receive blood from a patient via the venous line and an outlet for reperfusing blood to the patient via the arterial line, the pump operably coupled to the filter to communicate suction to the venous line;
a sensor coupled to the gas collection plenum to detect the presence of air in the venous line or filter and generates an output; and
a controller programmed to modulate operation of a speed of the pump responsive to the output while retaining some forward flow through the arterial line to the patient. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13)
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14. An apparatus for processing blood in an extracorporeal circuit, comprising:
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a venous line;
an arterial line;
a blood processing system including a pump, a filter having an air collection plenum and an oxygenator, the blood processing system having an inlet to receive blood from a patient via the venous line and an outlet for reperfusing blood to the patient via the arterial line;
a sensor operably coupled to the filter to generate an output;
a valve coupled to the filter to selectively remove air from the air collection plenum; and
a controller programmed to modulate operation of the valve and the pump responsive to the output while retaining some forward flow through the arterial line to the patient. - View Dependent Claims (15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26)
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Specification