Peripheral arterial monitoring instruments
First Claim
1. Instrumentation for performing measurements of arterial volume comprising:
- an inflatable cuff;
means, connected to said cuff, for inflating and deflating said cuff;
means for detecting pressure levels within said cuff; and
means, coupled to said cuff inflating and deflating means, for expelling air from said cuff in a quantified manner and means for computing said quantified amount of expelled air, including means of known volume for transferring pressurized air form said cuff; and
means responsive to said computed amounts of air for computing arterial volume.
5 Assignments
0 Petitions
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. A display of these characteristics as a function of pre and post anesthetic administration is particularly useful to the anesthesiologist and surgeon.
44 Citations
13 Claims
-
1. Instrumentation for performing measurements of arterial volume comprising:
-
an inflatable cuff; means, connected to said cuff, for inflating and deflating said cuff; means for detecting pressure levels within said cuff; and means, coupled to said cuff inflating and deflating means, for expelling air from said cuff in a quantified manner and means for computing said quantified amount of expelled air, including means of known volume for transferring pressurized air form said cuff; and means responsive to said computed amounts of air for computing arterial volume. - View Dependent Claims (2, 3, 4)
-
-
5. Instrumentation for performing measurements of arterial capacity comprising:
-
an inflatable cuff; means, connected to said cuff, for inflating and deflating said cuff; means for detecting pressure levels within said cuff; means, coupled to said cuff inflating and deflating means, for expelling air from said cuff in a quantified manner and for computing said quantified amounts of expelled air; and means, responsive to said air expelling means and said pressure level detecting means, for computing arterial capacity. - View Dependent Claims (6)
-
-
7. Instrumentation for performing measurements of arterial volume comprising:
-
an inflatable cuff; means, connected to said cuff, for inflating and deflating said cuff; means for detecting cuff pressure; and means, coupled to said cuff inflating and deflating means, for determining incremental quantities of air removed from said cuff. - View Dependent Claims (8, 9, 10, 11, 12, 13)
-
Specification