US 7,118,534 B2 · Methods for monitoring and optimizing central venous pressure and intravascular volume

Abstract

Central Venous Pressure (CVP) is non-invasively determined with accuracy comparable to invasive measurement techniques. To do so, curves are plotted based on non-invasively determined patient information obtained by applying a controllable variable (pressure) to a vein of interest at a non-distal point and taking certain measurements (such as pressure and volume measurements) from the patient. An example of a controllable variable is voltage applied in incremental inflation/deflation of a vascular cuff (1). A curve is plotted based on datapoints (such as a volume increase curve or a volume decline curve). Pertinent, accurate CVP and/or blood volume information is obtained from the slope of the non-invasive-based curve. Accurate CVP information is provided without the risks and disadvantages of invasive measurements.

Claims33

Dependent claims

A method for non-invasively determining and optimizing Central Venous Pressure (CVP) comprising the steps of:

applying a controllable pressure to a vein of interest at a non-distal point of a patient;
taking pressure and volume measurements from the patient to generate data points;
plotting intravascular measurements based on the data points as pressure and volume change curves;
determining from the pressure and volume and change curves an overall slope of the volume change curve and a maximum slope of the volume change curve;
and
determining the CVP based on pressure at the volume change curve maximum slope.

3 more elements

Dependencies are inferred from the claim text.

Methods for monitoring and optimizing central venous pressure and intravascular volume

Life of this patent

Methods for monitoring and optimizing central venous pressure and intravascular volume

Life of this patent

Abstract

Claims33