US5218968A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Peripheral arterial monitoring instruments
Assignee: Ethicon Inc
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Filing: 1992-01-22
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Granted: 1993-06-15
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Expires: 2012-01-22
Abstract
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.
Inventors
- 👤 Howard P. Apple
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 22:56
CPC Classifications
A; A61; A61B; A61B5/00; A61B5/02; A61B5/02007; A61B5/021; A61B5/022; A61B5/02225
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
70 words
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 of said cuff; means, responsive to said detected pressure levels, for determining volumetric measurements of arterial blood; and means for calibrating said volumetric determining means, including means for measuring the volume of air removed from said cuff during the deflation of said cuff.
Claim 2
Dependent Claim
70 words
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 of said cuff; means, responsive to said detected pressure levels, for determining volumetric measurements of arterial blood; and means for calibrating said volumetric determining means, including means for measuring the volume of air removed from said cuff during the deflation of said cuff.
Claim 3
Dependent Claim
28 words
Instrumentation according to claim 1, wherein said calibrating means includes means, responsive to said inflating and deflating means, for transferring a predetermined quantity of air from said cuff.
Claim 4
Dependent Claim
111 words
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 of said cuff; means, responsive to said detected pressure levels, for determining volumetric measurements of arterial blood; means for calibrating said volumetric determining means, including means for measuring the volume of air removed from said cuff during the deflation of said cuff; wherein said calibrating means includes means, responsive to said inflating and deflating means, for transferring a predetermined quantity of air from said cuff; and wherein said transferring means is periodically activatable to incrementally remove said predetermined quantity of air from said cuff.
Claim 5
Dependent Claim
111 words
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 of said cuff; means, responsive to said detected pressure levels, for determining volumetric measurements of arterial blood; means for calibrating said volumetric determining means, including means for measuring the volume of air removed from said cuff during the deflation of said cuff; wherein said calibrating means includes means, responsive to said inflating and deflating means, for transferring a predetermined quantity of air from said cuff; and wherein said transferring means is periodically activatable to incrementally remove said predetermined quantity of air from said cuff.
Claim 6
Dependent Claim
76 words
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 of said cuff; means, responsive to said detected pressure levels, for determining volumetric measurements of arterial blood; and means for calibrating said volumetric determining means, including means for measuring the volume of air removed from said cuff during the deflation of said cuff, as a function of cuff pressure.
Claim 7
Dependent Claim
76 words
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 of said cuff; means, responsive to said detected pressure levels, for determining volumetric measurements of arterial blood; and means for calibrating said volumetric determining means, including means for measuring the volume of air removed from said cuff during the deflation of said cuff, as a function of cuff pressure.
Claim 8
Dependent Claim
28 words
Instrumentation according to claim 4, wherein said calibrating means includes means, responsive to said inflating and deflating means, for transferring a predetermined quantity of air from said cuff.
Claim 9
Dependent Claim
23 words
Instrumentation according to claim 5, wherein said transferring means is periodically activatable to incrementally remove said predetermined quantity of air from said cuff.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1996-06-14 | 1996-12-14 | 1997-06-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2000-06-14 | 2000-12-14 | 2001-06-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2004-06-14 | 2004-12-14 | 2005-06-15 | $7700.00 | Window Closed / Lapsed |