METHOD, ARRANGEMENT AND APPARATUS FOR ASSESSING FLUID BALANCE STATUS OF A SUBJECT
First Claim
1. A method for assessing fluid balance status of a subject, the method comprising:
- determining at least one physiological parameter responsive to blood volume changes in the subject;
producing a predetermined change in ventilation of the subject;
defining a change that the predetermined change causes in at least one of the at least one physiological parameter, thereby to obtain at least one measure of change from the at least one physiological parameter; and
assessing the fluid balance status of the subject based on the at least one measure of change.
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Accused Products
Abstract
A method, arrangement and apparatus for assessing fluid balance status of a subject are disclosed. At least one physiological parameter responsive to blood volume changes in the subject is determined and a predetermined change in the ventilation of the subject is produced. The response that the predetermined change of ventilation causes in at least one of the at least one physiological parameter is then determined, thereby to obtain at least one measure of change. The fluid balance status of the subject may be assessed based on the at least one measure of change. The subject is typically connected to a ventilator and the predetermined change is produced by controlling the ventilator.
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Citations
20 Claims
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1. A method for assessing fluid balance status of a subject, the method comprising:
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determining at least one physiological parameter responsive to blood volume changes in the subject; producing a predetermined change in ventilation of the subject; defining a change that the predetermined change causes in at least one of the at least one physiological parameter, thereby to obtain at least one measure of change from the at least one physiological parameter; and assessing the fluid balance status of the subject based on the at least one measure of change. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
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9. An arrangement for assessing fluid balance status of a subject, the arrangement comprising:
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a physiological parameter unit configured to determine at least one physiological parameter responsive to blood volume changes in the subject; a ventilation control unit configured to produce a predetermined change in ventilation of the subject; a first assessment unit configured to determine a change that the predetermined change causes in at least one of the at least one physiological parameter, thereby to obtain at least one measure of change from the at least one physiological parameter; and a second assessment unit configured to assess the fluid balance status of the subject based on the at least one measure of change. - View Dependent Claims (10, 11, 12, 13, 14, 15)
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16. An apparatus for assessing fluid balance status of a subject, the apparatus comprising:
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a first interface unit configured to receive successive values of at least one physiological parameter responsive to blood volume changes in the subject; a second interface unit configured to detect a change in ventilation of the subject; a first assessment unit configured to monitor a response that the change causes in at least one of the at least one physiological parameter, thereby to derive at least one measure of change from the at least one physiological parameter; and a second assessment unit configured to assess the fluid balance status of the subject based on the at least one measure of change. - View Dependent Claims (17, 18, 19, 20)
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Specification