Method and device for detecting a configuration of withdrawal and return devices
First Claim
1. A device for detecting a reversed configuration of withdrawal and return devices coupling an extracorporeal blood flow circuit to a cardiovascular system of a subject, wherein the withdrawal and return devices are configurable in a normal configuration and the reversed configuration, wherein in the normal configuration the withdrawal device is in an upstream position of said cardiovascular system for withdrawal of fluid and the return device is in a downstream position of the cardiovascular system for return of fluid, and further wherein in the reversed configuration the positioning of the return and withdrawal devices is reversed, the device comprising:
- a primary pressure sensor in the extracorporeal blood flow circuit, the primary pressure sensor configured to provide a primary measurement signal comprising at least a subject pulse from a subject pulse generator in the cardiovascular system;
a signal processor configured to;
receive the primary measurement signal obtained by the primary pressure sensor in the extracorporeal blood flow circuit;
process the primary measurement signal for extraction of primary pressure data originating from the subject pulse generator in the cardiovascular system, the primary pressure data comprising at least a part of the subject pulse from the subject pulse generator;
calculate a parameter value from the primary pressure data; and
determine the reversed configuration based at least partly on the parameter value calculated from the primary pressure data comprising at least a part of the subject pulse from the subject pulse generator; and
a notification apparatus to provide a notification when the reversed configuration has been determined.
1 Assignment
0 Petitions
Accused Products
Abstract
A device is arranged to detect a configuration of withdrawal and return devices (1, 14, 111, 112, 211, 212, 702, 703, 802, 803) coupling an extracorporeal blood flow circuit (20) to a cardiovascular system of a subject. The device comprises a signal processor (29), which is configured to receive a primary measurement signal obtained by a primary pressure sensor (4a, 4b, 4c) in the extracorporeal blood flow circuit (20). The device is further configured to process the primary measurement signal for extraction of primary pressure data originating from a subject pulse generator (3′) in the cardiovascular system or extracorporeal blood flow circuit (20), the primary pressure data comprising at least a part of a first pulse from the subject pulse generator (3′). The device is also configured to calculate a parameter value from the primary pressure data and to determine the configuration based at least partly on the parameter value.
14 Citations
29 Claims
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1. A device for detecting a reversed configuration of withdrawal and return devices coupling an extracorporeal blood flow circuit to a cardiovascular system of a subject, wherein the withdrawal and return devices are configurable in a normal configuration and the reversed configuration, wherein in the normal configuration the withdrawal device is in an upstream position of said cardiovascular system for withdrawal of fluid and the return device is in a downstream position of the cardiovascular system for return of fluid, and further wherein in the reversed configuration the positioning of the return and withdrawal devices is reversed, the device comprising:
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a primary pressure sensor in the extracorporeal blood flow circuit, the primary pressure sensor configured to provide a primary measurement signal comprising at least a subject pulse from a subject pulse generator in the cardiovascular system; a signal processor configured to; receive the primary measurement signal obtained by the primary pressure sensor in the extracorporeal blood flow circuit; process the primary measurement signal for extraction of primary pressure data originating from the subject pulse generator in the cardiovascular system, the primary pressure data comprising at least a part of the subject pulse from the subject pulse generator; calculate a parameter value from the primary pressure data; and determine the reversed configuration based at least partly on the parameter value calculated from the primary pressure data comprising at least a part of the subject pulse from the subject pulse generator; and a notification apparatus to provide a notification when the reversed configuration has been determined. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17)
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18. A method for detecting a reversed configuration of withdrawal and return devices coupling an extracorporeal blood flow circuit to a cardiovascular system of a subject, wherein the withdrawal and return devices are configurable in a normal configuration and the reversed configuration, wherein in the normal configuration the withdrawal device is in an upstream position of said cardiovascular system for withdrawal of fluid and the return device is in a downstream position of the cardiovascular system for return of fluid, and further wherein in the reversed configuration the positioning of the return and withdrawal devices is reversed, the method comprising:
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receiving a primary measurement signal obtained by a primary pressure sensor in the extracorporeal blood flow circuit, wherein the primary measurement signal comprises at least a subject pulse from a subject pulse generator in the cardiovascular system; processing the primary measurement signal for extraction of primary pressure data originating from the subject pulse generator in the cardiovascular system, the primary pressure data comprising at least a part of the subject pulse from the subject pulse generator; calculating a parameter value from the primary pressure data; determining the reversed configuration based at least partly on the parameter value calculated from the primary pressure data comprising at least a part of the subject pulse from the subject pulse generator; and providing a notification when the reversed configuration has been determined. - View Dependent Claims (19, 20, 21, 22, 23, 24, 25)
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26. A computer-readable medium comprising computer instructions which, when executed by a processor in an extracorporeal blood treatment system, cause the processor to detect a reversed configuration of withdrawal and return devices coupling an extracorporeal blood flow circuit to a cardiovascular system of a subject by:
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receiving a primary measurement signal obtained by a primary pressure sensor in the extracorporeal blood flow circuit, wherein the primary measurement signal comprises at least a subject pulse from a subject pulse generator in the cardiovascular system; processing the primary measurement signal for extraction of primary pressure data originating from the subject pulse generator in the cardiovascular system, the primary pressure data comprising at least a part of the subject pulse from the subject pulse generator; calculating a parameter value from the primary pressure data; determining the reversed configuration based at least partly on the parameter value calculated from the primary pressure data comprising at least a part of the subject pulse from the subject pulse generator, wherein the withdrawal and return devices are configurable in a normal configuration and the reversed configuration, wherein in the normal configuration the withdrawal device is in an upstream position of said cardiovascular system for withdrawal of fluid and the return device is in a downstream position of the cardiovascular system for return of fluid, and further wherein in the reversed configuration the positioning of the return and withdrawal devices is reversed; and generating a signal to initiate notification of determination of the reversed configuration.
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27. A device for detecting a reversed configuration of withdrawal and return devices coupling an extracorporeal blood flow circuit to a cardiovascular system of a subject, wherein the withdrawal and return devices are configurable in a normal configuration and the reversed configuration, wherein in the normal configuration the withdrawal device is in an upstream position of said cardiovascular system for withdrawal of fluid and the return device is in a downstream position of the cardiovascular system for return of fluid, and further wherein in the reversed configuration the positioning of the return and withdrawal devices is reversed, said device comprising:
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primary pressure sensing means in the extracorporeal blood flow circuit, the primary pressure sensing means for providing a primary measurement signal comprising at least a subject pulse from a subject pulse generator in the cardiovascular system; means for receiving the primary measurement signal obtained by the primary pressure sensing means in the extracorporeal blood flow circuit; means for processing the primary measurement signal for extraction of primary pressure data originating from the subject pulse generator in the cardiovascular system, the primary pressure data comprising at least a part of the subject pulse from the subject pulse generator; means for calculating a parameter value from the primary pressure data; means for determining the reversed configuration based at least partly on the parameter value calculated from the primary pressure data comprising at least a part of the subject pulse from the subject pulse generator; and means for providing a notification when the reversed configuration has been determined.
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28. A device for detecting a reversed configuration of withdrawal and return devices coupling an extracorporeal blood flow circuit to a cardiovascular system of a subject, wherein the withdrawal and return devices are configurable in a normal configuration and the reversed configuration, wherein in the normal configuration the withdrawal device is in an upstream position of said cardiovascular system for withdrawal of fluid and the return device is in a downstream position of the cardiovascular system for return of fluid, and further wherein in the reversed configuration the positioning of the return and withdrawal devices is reversed, the device comprising:
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a primary pressure sensor in the extracorporeal blood flow circuit, the primary pressure sensor configured to provide a primary measurement signal comprising at least a pump pulse from a pump pulse generator; a signal processor configured to; receive the primary measurement signal obtained by the primary pressure sensor in the extracorporeal blood flow circuit; process the primary measurement signal for extraction of primary pressure data originating from the pump pulse generator in the extracorporeal blood flow circuit, the primary pressure data comprising at least a part of the pump pulse from the pump pulse generator; calculate a parameter value from the primary pressure data, the parameter value being indicative of a cross-talk pressure pattern generated from a combination of pressure pulses from the pump pulse generator obtained by the primary pressure sensor from two directions, one passing through the cardiovascular system of the subject and the other from the pump pulse generator within the extracorporeal circuit; and determine the reversed configuration based at least partly on the parameter value calculated from the primary pressure data; and a notification apparatus to provide a notification when the reversed configuration has been determined.
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29. A method for detecting a reversed configuration of withdrawal and return devices coupling an extracorporeal blood flow circuit to a cardiovascular system of a subject, wherein the withdrawal and return devices are configurable in a normal configuration and the reversed configuration, wherein in the normal configuration the withdrawal device is in an upstream position of said cardiovascular system for withdrawal of fluid and the return device is in a downstream position of the cardiovascular system for return of fluid, and further wherein in the reversed configuration the positioning of the return and withdrawal devices is reversed, the method comprising:
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receiving a primary measurement signal obtained by a primary pressure sensor in the extracorporeal blood flow circuit, wherein the primary measurement signal comprises at least a pump pulse from a pump pulse generator; processing the primary measurement signal for extraction of primary pressure data originating from the pump pulse generator in the extracorporeal blood flow circuit, the primary pressure data comprising at least a part of the pump pulse from the pump pulse generator; calculating a parameter value from the primary pressure data, the parameter value being indicative of a cross-talk pressure pattern generated from a combination of pressure pulses from the pump pulse generator obtained by the primary pressure sensor from two directions, one passing through the cardiovascular system of the subject and the other from the pump pulse generator within the extracorporeal circuit; and determining the reversed configuration based at least partly on the parameter value calculated from the primary pressure data; and providing a notification when the reversed configuration has been determined.
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Specification