Peripheral arterial monitoring instruments
First Claim
1. A method of determining vital sign characteristics in an artery comprising the steps of:
- inflating a cuff around a peripheral part of a body containing the artery;
incrementally deflating said cuff;
detecting the pressure within said cuff during said deflating of said cuff;
determining incremental quantities of air removed from said cuff during the deflating of said cuff; and
using said incremental quantities of air to compute arterial volume, systolic pressure and pulse pressure.
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Accused Products
Abstract
A method and apparatus are described for determining characteristics of peripheral arterial volume and compliance. A blood pressure cuff is inflated and deflated around a limb of the body and pressure measurements are taken. The volume of air removed from the cuff is determined in a quantifiable manner, such as by expelling air through an orifice of known characteristics or by means of a volume of know characteristics. The detected pressures and volume of air removed are used to compute oscillation volume, which in turn is used to display arterial capacity and compliance as a function of transmural pressure and time. Arterial capacity may be displayed in terms of arterial radius, arterial cross-sectional area, or arterial volume. Also, systolic and pulse pressures are determined using only these determined values.
44 Citations
8 Claims
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1. A method of determining vital sign characteristics in an artery comprising the steps of:
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inflating a cuff around a peripheral part of a body containing the artery; incrementally deflating said cuff; detecting the pressure within said cuff during said deflating of said cuff; determining incremental quantities of air removed from said cuff during the deflating of said cuff; and using said incremental quantities of air to compute arterial volume, systolic pressure and pulse pressure. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
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Specification