Method for processing of continuous pressure-related signals derivable from locations inside or outside a human body or body cavity
AssigneeDpcom AS
InventorPer Kristian Eide
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Abstract
This invention describes a method for processing pressure signals derivable from locations inside or outside a human or animal body or body cavity. Different aspects of the invention relate to a method for optimal differentiating between cardiac beat- and artifact-induced pressure waves, a method for obtaining new and improved information from said pressure signals. In particular, this invention describes the use of said inventive method for processing of pressure signals for controlling an adjustable shunt valve. The method can be incorporated in a processing unit of a device for use in draining fluid from a brain or spinal fluid cavity.
Claims25
A method for processing continuous pressure-related signals derivable from locations inside or outside a human body or body cavity, comprising the steps of obtaining samples of said signals at specific intervals, and converting thus sampled pressure signals into pressure-related digital data with a time reference,
- wherein for selectable time sequence windows the method comprises the further steps of:
- a) identifying from said digital data single pressure waves related to cardiac beat-induced pressure waves,
- b) identifying from said digital data pressure waves related to artifacts or a combination of artifacts and cardiac beat-induced pressure waves,
- c) computing time sequence (TS.x)-related parameters of said single pressure waves during individual of said time sequence windows,
- d) establishing an analysis output of said time sequence (TS.x)-related parameters for a selectable number of said time sequence windows,
- e) establishing a deliverable first control signal related to an analysis output in step d) for a selectable number of said time sequence windows, said first control signal being determined according to one or more selectable criteria for said analysis output, and
- f) modifying said deliverable first control signal into a second control signal to provide a performance modifying signal.
A method according to 1, wherein said identifying steps a) and b) are applied to each consecutive time sequence window in a continuous series of time sequence windows of a signal.
Dependencies are inferred from the claim text.