SYSTEM AND METHOD FOR DETECTING ACCESS DISCONNECTION
First Claim
1. A dialysis system comprising:
- a blood filter;
a dialysate pump connected to a dialysate portion of the blood filter;
a blood pump connected to a blood portion of the blood filter, the blood pump including a diaphragm that is moved in cycles to pump the blood, the cycles having a flow period and a no-flow period;
a patient access device in fluid communication with the blood portion of the blood filter, the no-flow period having a first characteristic of a property when the patient access device is lodged in a patient and a second characteristic of the property when the patient access device is dislodged from the patient; and
a logic implementer configured to determine that the patient access device has been dislodged from the patient when the second characteristic of the parameter is detected.
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Accused Products
Abstract
A dialysis system includes: a blood filter; a dialysate pump connected to a dialysate portion of the blood filter; a blood pump connected to a blood portion of the blood filter, the blood pump including a diaphragm that is moved in cycles to pump the blood, the cycles having a flow period and a no-flow period; a patient access device in fluid communication with the blood portion of the blood filter, the no-flow period having a first characteristic of a property when the patient access device is lodged in a patient and a second characteristic of the property when the patient access device is dislodged from the patient; and a logic implementer configured to determine that the patient access device has been dislodged from the patient when the second characteristic of the parameter is detected.
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Citations
41 Claims
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1. A dialysis system comprising:
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a blood filter; a dialysate pump connected to a dialysate portion of the blood filter; a blood pump connected to a blood portion of the blood filter, the blood pump including a diaphragm that is moved in cycles to pump the blood, the cycles having a flow period and a no-flow period; a patient access device in fluid communication with the blood portion of the blood filter, the no-flow period having a first characteristic of a property when the patient access device is lodged in a patient and a second characteristic of the property when the patient access device is dislodged from the patient; and a logic implementer configured to determine that the patient access device has been dislodged from the patient when the second characteristic of the parameter is detected. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16)
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17. A dialysis system comprising:
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a blood filter; a dialysate pump connected to a dialysate portion of the blood filter; a blood pump connected to a blood portion of the blood filter, the blood pump including a diaphragm that is moved in cycles to pump the blood, the cycles having a flow period and a no-flow period; a patient access device in fluid communication with the blood portion of the blood filter, the no-flow period having a first duration when the patient access device is lodged in a patient and a second duration when the patient access devices is dislodged from the patient; and a logic implementer configured to determine that the patient access device has been dislodged from the patient when the second duration is detected. - View Dependent Claims (18)
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19. A dialysis system comprising:
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a blood filter; a dialysate pump connected to a dialysate portion of the blood filter; a blood pump connected to a blood portion of the blood filter, the blood pump including a diaphragm that is moved in cycles to pump the blood, the cycles having a flow period and a no-flow period; a patient access device in fluid communication with the blood portion of the blood filter, the no-flow period having a characteristic duration when the patient access device is lodged in a patient; and a logic implementer configured to determine that the patient access device has been dislodged from the patient when the characteristic duration of the no-flow period is exceeded. - View Dependent Claims (20)
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21. A dialysis system comprising:
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a blood filter; a dialysate pump connected to a dialysate portion of the blood filter; a blood pump connected to a blood portion of the blood filter, the blood pump operates so as to have a flow period and a no-flow period; a patient access device in fluid communication with the blood portion of the blood filter, the no-flow period having a first blood pressure when the patient access device is lodged in a patient and a second blood pressure when the access devices is dislodged from the patient; and a logic implementer configured to determine that the patient access device has been dislodged from the patient when the second blood pressure is detected. - View Dependent Claims (22, 23, 24, 25)
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26. A dialysis system comprising:
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a blood filter; a dialysate pump connected to a dialysate portion of the blood filter; a blood pump connected to a blood portion of the blood filter, the blood pump operated so as to have a flow period and a no-flow period; a patient access device in fluid communication with the blood portion of the blood filter, the no-flow period having a characteristic blood pressure when the patient access device is lodged in a patient; and a logic implementer configured to determine that the patient access device has been dislodged from the patient when the characteristic blood pressure of the no-flow period is lowered. - View Dependent Claims (27)
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28. A dialysis system comprising:
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a blood filter; a dialysate pump connected to a dialysate portion of the blood filter; a blood pump connected to a blood portion of the blood filter, the blood pump operated so as to have a flow period and a no-flow period; a patient access device in fluid communication with the blood portion of the blood filter, the no-flow period having a first characteristic of a property when the patient access device is lodged in a patient and a second characteristic of the property when the patient access device is dislodged from the patient; and a logic implementer configured to determine that the patient access device has been dislodged from the patient when the second characteristic of the parameter is detected. - View Dependent Claims (29, 30)
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31. An access disconnection system for a dialysis machine operable with a blood filter, the dialysis machine including a dialysate pump connectable to a dialysate portion of the blood filter and a blood pump connectable to a blood portion of the blood filter, and a patient access device in fluid communication with the blood portion of the blood filter, the access disconnection system comprising:
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a logic implementer programmed to; (i) operate the blood pump so as to have a flow period and a no-flow period, the no-flow period having a first characteristic of a property when the patient access device is lodged in a patient and a second characteristic of the property when the patient access device is dislodged from the patient, and (ii) determine that the patient access device has been dislodged from the patient when the second characteristic of the property is detected.
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32. An access disconnection system for a dialysis machine operable with a blood filter, the dialysis machine including a dialysate pump connectable to a dialysate portion of the blood filter, a blood pump connectable to a blood portion of the blood filter, the blood pump operated so as to have a flow period and a no-flow period, and a patient access device in fluid communication with the blood portion of the blood filter, the access disconnection system comprising:
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a logic implementer programmed to; (i) store a first characteristic of a property when the patient access device is lodged in a patient and a second characteristic of the property when the patient access device is dislodged from the patient, and (ii) determine that the patient access device has been dislodged from the patient when the second characteristic of the property is detected.
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33. An access disconnection method comprising:
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allowing a blood pump to stop; while the blood pump is stopped, taking a measurement indicative of whether a patient access device is lodged in a patient or dislodged from the patient; and actuating the blood pump if the measurement is indicative of the patient access device being lodged in the patient. - View Dependent Claims (34, 35, 36, 37, 38, 39, 40, 41)
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Specification