System and method for delivery of regional citrate anticoagulation to extracorporeal blood circuits
First Claim
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1. A system for regional citrate anticoagulation in an extracorporeal blood circuit including an arterial blood line arranged to be connected to a vascular access for withdrawing blood from a patient and a venous blood line arranged to be connected to the vascular access for returning blood to the patient, the system comprising:
- a hemofilter in fluid communication with the arterial and venous blood lines;
a first pre-filter infusion line connected to the arterial blood line upstream from the hemofilter for infusing a first pre-filter infusion solution comprising a citrate anticoagulant-containing solution into blood in the arterial blood line;
a second pre-filter infusion line connected to the arterial blood line upstream from the hemofilter for infusing a second pre-filter infusion solution comprising a first bicarbonate-containing solution into blood in the arterial blood line;
an effluent fluid line in fluid communication with the hemofilter for carrying effluent fluid away from the hemofilter;
a post-filter infusion line connected to the venous blood line downstream from the hemofilter for infusing a post-filter infusion solution comprising a second bicarbonate-containing solution into blood in the venous blood line;
an additional infusion line connected to the venous blood line downstream from a connection of the post-filter infusion line for infusing an additional infusion solution comprising a calcium- and magnesium-containing solution into blood in the venous blood line; and
at least one arterial hematocrit sensor operably connected to the arterial blood line upstream from the second pre-filter infusion line for providing circuit plasma flow in real time for controlling at least one of hemofilter single pass citrate extraction and an infusion rate of the additional infusion solution.
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Abstract
The present invention includes a comprehensive replacement fluid system and method for the delivery of regional citrate anticoagulation (RCA) to extracorporeal blood circuits, wherein the system may include an online clearance monitor (OCM) and a circuit effluent online sensor system (OSS) for the continuous determination of patient plasma content of ultrafilterable solutes.
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Citations
20 Claims
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1. A system for regional citrate anticoagulation in an extracorporeal blood circuit including an arterial blood line arranged to be connected to a vascular access for withdrawing blood from a patient and a venous blood line arranged to be connected to the vascular access for returning blood to the patient, the system comprising:
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a hemofilter in fluid communication with the arterial and venous blood lines; a first pre-filter infusion line connected to the arterial blood line upstream from the hemofilter for infusing a first pre-filter infusion solution comprising a citrate anticoagulant-containing solution into blood in the arterial blood line; a second pre-filter infusion line connected to the arterial blood line upstream from the hemofilter for infusing a second pre-filter infusion solution comprising a first bicarbonate-containing solution into blood in the arterial blood line; an effluent fluid line in fluid communication with the hemofilter for carrying effluent fluid away from the hemofilter; a post-filter infusion line connected to the venous blood line downstream from the hemofilter for infusing a post-filter infusion solution comprising a second bicarbonate-containing solution into blood in the venous blood line; an additional infusion line connected to the venous blood line downstream from a connection of the post-filter infusion line for infusing an additional infusion solution comprising a calcium- and magnesium-containing solution into blood in the venous blood line; and at least one arterial hematocrit sensor operably connected to the arterial blood line upstream from the second pre-filter infusion line for providing circuit plasma flow in real time for controlling at least one of hemofilter single pass citrate extraction and an infusion rate of the additional infusion solution. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13)
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14. A method for regional citrate anticoagulation in an extracorporeal blood circuit including an arterial blood line arranged to be connected to a vascular access for withdrawing blood from a patient and a venous blood line arranged to be connected to the vascular access for returning blood to the patient, the method comprising:
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providing a hemofilter in fluid communication with the arterial and venous blood lines; providing an effluent fluid line in communication with the hemofilter for carrying a filter effluent fluid away from the hemofilter; infusing a first pre-filter infusion solution comprising a citrate anticoagulant-containing solution into blood in the arterial blood line upstream from the hemofilter; infusing a second pre-filter infusion solution comprising a first bicarbonate-containing solution into blood in the arterial blood line upstream from the hemofilter; infusing a post-filter infusion solution comprising a second bicarbonate-containing solution into blood in the venous blood line downstream from the hemofilter; infusing an additional infusion solution comprising a calcium- and magnesium-containing solution into blood in the venous blood line downstream from a connection of the post-filter infusion solution; and sensing hematocrit on the arterial blood line upstream from the second pre-filter infusion line to provide circuit plasma flow in real time for controlling at least one of hemofilter single pass citrate extraction and an infusion rate of the additional infusion solution. - View Dependent Claims (15, 16, 17, 18, 19, 20)
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Specification