Medical fluid therapy flow control systems and methods
First Claim
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1. A medical fluid system comprising:
- a medical fluid flow path having a medical fluid supply, a first pump operable in a non-isolated condition to pump medical fluid from the supply to an extracorporeal circuit/blood filtering device and a second pump operable to pull fluid from the blood filtering device;
at least one ultrafilter upstream of the blood filtering device;
a flowmeter in fluid communication with a rinse outlet of the at least one ultrafilter;
an apparatus operable to isolate the blood filtering device from the rest of the medical fluid flow path to form an isolated condition; and
a control scheme programmed to (a) receive a volume from an entry by an operator when commencing delivery of the volume and (b) deliver the volume of fluid to the extracorporeal circuit by commanding;
(i) the isolating apparatus to isolate the blood filtering device and (ii) the first pump to concurrently deliver the volume of fluid from the medical fluid supply to the extracorporeal circuit.
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Abstract
Systems and methods for improving medical fluid delivery systems, such as hemofiltration (“HF”) and hemodiafiltration (“HDF”) are provided. In first embodiments, systems and methods for selectively performing pre- and postdilution HF and HDF clearance modes is provided. In other embodiments, systems and methods for providing prime bolus and rinseback fluid volumes before, during and/or after HF and HDF therapies are provided. In further embodiments, improved systems and methods for removing ultrafiltrate from the patient are provided. Still further, improved filtration configurations and methods are provided.
275 Citations
22 Claims
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1. A medical fluid system comprising:
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a medical fluid flow path having a medical fluid supply, a first pump operable in a non-isolated condition to pump medical fluid from the supply to an extracorporeal circuit/blood filtering device and a second pump operable to pull fluid from the blood filtering device; at least one ultrafilter upstream of the blood filtering device; a flowmeter in fluid communication with a rinse outlet of the at least one ultrafilter; an apparatus operable to isolate the blood filtering device from the rest of the medical fluid flow path to form an isolated condition; and a control scheme programmed to (a) receive a volume from an entry by an operator when commencing delivery of the volume and (b) deliver the volume of fluid to the extracorporeal circuit by commanding;
(i) the isolating apparatus to isolate the blood filtering device and (ii) the first pump to concurrently deliver the volume of fluid from the medical fluid supply to the extracorporeal circuit. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
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9. A medical fluid system, comprising:
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a medical fluid flow path having a medical fluid supply, a first pump operable to pump medical fluid from the supply to an extracorporeal circuit/blood filtering device and a second pump operable to pull fluid from the blood filtering device; at least one ultrafilter upstream of the blood filtering device; an apparatus operable to isolate the blood filtering device from the rest of the medical fluid flow path to form an isolated condition; and a control scheme programmed to (a) receive an amount of a volume prior to commencement of therapy and (b) deliver the volume of fluid to the extracorporeal circuit as a prime, a rinseback or a bolus by commanding;
(i) the isolating apparatus to isolate the blood filtering device and (ii) the first pump to concurrently deliver the volume of fluid from the medical fluid supply. - View Dependent Claims (10, 11, 12, 13, 14, 15)
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16. A medical fluid system comprising:
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a medical fluid flow path having a medical fluid supply, a first pump operable in a non-isolated condition to pump medical fluid from the supply to an extracorporeal circuit and a blood filtering device, a second pump operable to pull fluid from the blood filtering device and a third pump operably connected to the extracorporeal circuit; at least one ultrafilter upstream of the blood filtering device and a flowmeter in fluid communication with a rinse outlet of the at least one ultrafilter and the medical fluid flow path; an apparatus operable to isolate the blood filtering device from the rest of the medical fluid flow path to form an isolated condition; and a control scheme configured for periodic flow from the rinse outlet of the at least one ultrafilter to a drain, the control scheme programmed to deliver a volume of fluid to the extracorporeal circuit by commanding;
(i) the isolating apparatus to isolate the blood filtering device and (ii) the third pump to deliver the volume of fluid from the apparatus operable to isolate to the extracorporeal circuit. - View Dependent Claims (17, 18, 19, 20, 21, 22)
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Specification