ENHANCED SIGNAL DETECTION FOR ACCESS DISCONNECTION SYSTEMS
First Claim
Patent Images
1. An access disconnection system comprising:
- an extracorporeal circuit;
first and second contacts provided in the extracorporeal circuit;
a signal source communicating with the first contact and configured to generate a signal within fluid flowing through the extracorporeal circuit;
an isolation ground in communication with the second contact; and
an apparatus positioned to apply a voltage at multiple points along a path from the extracorporeal circuit to earth ground, the voltages tending to prevent at least a portion of the signal from traveling through earth ground to the isolation ground.
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Abstract
An access disconnection system includes an extracorporeal circuit; first and second contacts provided in the extracorporeal circuit; a current source communicating with the first contact and configured to generate a current within fluid flowing through the extracorporeal circuit; and an apparatus positioned to apply a signal at multiple points along a path from the extracorporeal circuit, the signals tending to prevent at least a portion of the current from traveling through a ground path in parallel to the extracorporeal circuit.
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Citations
50 Claims
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1. An access disconnection system comprising:
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an extracorporeal circuit;
first and second contacts provided in the extracorporeal circuit;
a signal source communicating with the first contact and configured to generate a signal within fluid flowing through the extracorporeal circuit;
an isolation ground in communication with the second contact; and
an apparatus positioned to apply a voltage at multiple points along a path from the extracorporeal circuit to earth ground, the voltages tending to prevent at least a portion of the signal from traveling through earth ground to the isolation ground. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14)
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15. An access disconnection system comprising:
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an extracorporeal circuit;
first and second contacts provided in the extracorporeal circuit;
a current source communicating with at least one of the first and second contacts and configured to generate a current within fluid flowing through the extracorporeal circuit; and
an apparatus positioned to apply a signal at multiple points along a path in parallel to the extracorporeal circuit, the signals tending to prevent at least a portion of the current from traveling through the parallel path. - View Dependent Claims (16, 17, 18)
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19. An access disconnection system comprising:
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an extracorporeal circuit;
first and second contacts provided in the extracorporeal circuit;
a signal source communicating with at least one of the first and second contacts and configured to generate a signal within fluid flowing through the extracorporeal circuit; and
an apparatus positioned to apply a potential at multiple points along a path in parallel to the extracorporeal circuit, the applied potentials creating a virtual open circuit between the multiple points. - View Dependent Claims (20)
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21. An access disconnection system comprising:
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an extracorporeal circuit;
a dialysate circuit;
a first sensing apparatus configured to sense a first signal indicative of a first impedance produced by fluid flowing through the extracorporeal circuit; and
a second sensing apparatus configured to sense a second signal indicative of a second impedance produced by fluid flowing through the dialysate circuit. - View Dependent Claims (22, 23, 24, 25, 26, 27, 28, 29)
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30. An access disconnection system comprising:
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an extracorporeal circuit;
arterial and venous contacts provided in the extracorporeal circuit;
arterial and venous patient access apparatuses;
a signal source communicating with at least one of the arterial and venous contacts and configured to generate a signal within fluid flowing through the extracorporeal circuit;
a sensing apparatus configured to sense a first portion of the signal indicative of a first impedance produced by fluid flowing through the extracorporeal circuit; and
wherein at least one of the arterial and venous contacts is placed close enough to a respective arterial and venous patient access apparatus such that a second portion of the signal indicative of a second impedance produced by fluid flowing through a parallel ground loop can be ignored. - View Dependent Claims (31, 32)
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33. An access disconnection system comprising:
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an extracorporeal circuit;
a dialysate circuit;
an apparatus positioned to apply a potential at multiple points along the dialysate circuit, the applied potentials creating a virtual open circuit between the multiple points;
an electrical path extending from the multiple points, to the extracorporeal circuit; and
a device configured to bring a patient to ground, such that when the patient is connected to the extracorporeal circuit and to grounding device, the electrical path extends from the extracorporeal circuit to ground. - View Dependent Claims (34, 35, 36, 37, 38)
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39. An access disconnection system comprising:
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an extracorporeal circuit;
a dialysate circuit;
an electrical path extending from the dialysate circuit to the extracorporeal circuit;
a signal source configured to induce a signal into the electrical path from the signal source; and
a sensing apparatus configured to sense the signal, the signal indicative of an impedance of the electrical path. - View Dependent Claims (40, 41, 42, 43, 44)
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45. An access disconnection system comprising:
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an extraporaneous circuit;
a dialysate circuit;
a signal source configured to induce a signal into the dialysate circuit;
a sensing apparatus configured to sense the signal, the signal indicative of at lease one electrical impedance in the extracorporeal circuit and at least one electrical impedance in the dialysate circuit. - View Dependent Claims (46, 47)
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48. An access disconnection system comprising:
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a protector module including at least one line clamp and a wireless receiver, the protector module configured to be positioned with respect to a blood treatment machine so as to be able to at least partially occlude at least one of an arterial line and a venous line using the at least one line clamp upon a signal received by the wireless receiver; and
a detector module including a sensor and a wireless emitter, the detector module configured to be prositioned with respect to the arterial and venous lines so as to be able to sense a disconnection of one of the arterial and venous lines from a patient and send the signal to the wireless receiver of the protector module via the wireless emitter. - View Dependent Claims (49, 50)
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Specification