US4873987A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Noninvasive continuous monitor of arterial blood pressure waveform
Assignee: Individual
•
Filing: 1988-06-30
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Granted: 1989-10-17
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Expires: 2008-06-30
Abstract
Abstract A method, and a device utilizing that method, for continuously, noninvasively measuring a patient's blood pressure. Discrete values of systolic and diastolic blood pressure are noninvasively determined and input to a microprocessor. A continuous non-pressure waveform signal is generated through noninvasive monitoring of the patient and is also input to the microprocessor. The microprocessor calibrates the continuous non-pressure waveform signal using the discrete blood pressure values, thereby generating a continuous waveform signal of blood pressure.
Inventors
- 👤 Ljubomir Djordjevich
- 👤 Anthony K. Ivankovich
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 00:55
CPC Classifications
A; A61; A61B; A61B5/00; A61B5/72; A61B5/7235; A61B5/7253; A61B5/7257; A61B5/02; A61B5/021; A61B5/022; A61B5/05; A61B5/053; A61B5/0535; A61B2560/00; A61B2560/02; A61B2560/0223
Claims Analysis
Total Claims: 30
Claim 1
Independent Claim
130 words
A method of continuously, noninvasively measuring blood pressure, said method comprising the steps of: noninvasively determining at least discrete systolic and diastolic blood pressure values; simultaneously, noninvasively monitoring the patient with a waveform signal means to generate a sample continuous non-pressure waveform signal; inputting said discrete systolic and diastolic blood pressure values and said sample continuous non-pressure waveform signal to a microprocessor; calculating at least systolic and diastolic points for said sample continuous non-pressure waveform signal; calibrating said systolic and diastolic points with said systolic and diastolic blood pressure values, respectively, and storing said calibrated information; continuously, noninvasively monitoring said patient with said waveform signal means to generate a continuous non-pressure waveform signal; using said calibrated information to transform said continuous non-pressure waveform signal into a continuous blood pressure waveform.
Claim 2
Independent Claim
130 words
A method of continuously, noninvasively measuring blood pressure, said method comprising the steps of: noninvasively determining at least discrete systolic and diastolic blood pressure values; simultaneously, noninvasively monitoring the patient with a waveform signal means to generate a sample continuous non-pressure waveform signal; inputting said discrete systolic and diastolic blood pressure values and said sample continuous non-pressure waveform signal to a microprocessor; calculating at least systolic and diastolic points for said sample continuous non-pressure waveform signal; calibrating said systolic and diastolic points with said systolic and diastolic blood pressure values, respectively, and storing said calibrated information; continuously, noninvasively monitoring said patient with said waveform signal means to generate a continuous non-pressure waveform signal; using said calibrated information to transform said continuous non-pressure waveform signal into a continuous blood pressure waveform.
Claim 3
Dependent Claim
34 words
The method of claim 1 wherein said noninvasive discrete determination of at least systolic and diastolic blood pressure values is made using one of the following: a pressure cuff, sphygmomanometer, or Korotkoff sound detector.
Claim 4
Dependent Claim
19 words
The method of claim 1 wherein said waveform signal means measures electrical conductance and generates a conductance waveform signal.
Claim 5
Dependent Claim
31 words
The method of claim 3 where in said noninvasive discrete determination of at least systolic and diastolic blood pressure values is made by analyzing the power spectrum of the conductance signal.
Claim 6
Dependent Claim
17 words
The method of claim 4 wherein the power spectrum is analyzed using a fast Fourier transform technique.
Claim 7
Dependent Claim
18 words
The method of claim 4 wherein the waveform signal generated is selected from the following: Z-wave or C-wave.
Claim 8
Dependent Claim
36 words
The method of claim 3 wherein said noninvasive discrete determination of at least systolic and diastolic blood pressure values is made by gradually deflating a pressure cuff and simultaneously detecting changes in the conductance waveform signal.
Claim 9
Dependent Claim
23 words
The method of claim 1 further comprising the step of determining the pulse rate by counting waves in said continuous non-pressure waveform signal.
Claim 10
Dependent Claim
13 words
The method of claim 1 wherein said waveform signal means measures electrical impedance.
Claim 11
Dependent Claim
15 words
The method of claim 1 wherein said waveform signal means ultrasonically monitors arterial wall movement.
Claim 12
Dependent Claim
17 words
The method of claim 1 wherein said waveform signal means performs X-ray imaging of arterial wall movement.
Claim 13
Dependent Claim
13 words
The method of claim 1 wherein said waveform signal means performs microwave imaging.
Claim 14
Dependent Claim
13 words
The method of claim 1 wherein said waveform signal means performs NMR imaging.
Claim 15
Dependent Claim
13 words
The method of claim 1 wherein said waveform signal means makes colorimetric measurements.
Claim 16
Independent Claim
96 words
A device for continuously, noninvasively measuring blood pressure, said device comprising: a pressure signal means for noninvasively determining at least discrete systolic and diastolic blood pressure values for a patient; a waveform signal means for noninvasively monitoring said patient to generate a continuous non-pressure waveform signal; and microprocessing means for receiving at least said discrete systolic and diastolic blood pressure values and said continuous non-pressure waveform signal as inputs, said continuous non-pressure waveform signal being calibrated using at least said discrete systolic and diastolic blood pressure values to generate a continuous waveform signal of blood pressure.
Claim 17
Independent Claim
96 words
A device for continuously, noninvasively measuring blood pressure, said device comprising: a pressure signal means for noninvasively determining at least discrete systolic and diastolic blood pressure values for a patient; a waveform signal means for noninvasively monitoring said patient to generate a continuous non-pressure waveform signal; and microprocessing means for receiving at least said discrete systolic and diastolic blood pressure values and said continuous non-pressure waveform signal as inputs, said continuous non-pressure waveform signal being calibrated using at least said discrete systolic and diastolic blood pressure values to generate a continuous waveform signal of blood pressure.
Claim 18
Dependent Claim
23 words
The device of claim 15 wherein said pressure signal means is one of the following: a pressure cuff, sphygmomanometer, or Korotkoff sound detector.
Claim 19
Dependent Claim
19 words
The device of claim 15 wherein said waveform signal means measures electrical conductance and generates a conductance waveform signal.
Claim 20
Dependent Claim
18 words
The device of claim 17 wherein said conductance waveform signal comprises one of the following: C-wave or Z-wave.
Claim 21
Dependent Claim
29 words
The device of claim 17 wherein said pressure signal means comprises at least a portion of the microprocessing means which analyzes the power spectrum of the conductance waveform signal.
Claim 22
Dependent Claim
20 words
The device of claim 9 wherein the microprocessing means analyzes the power spectrum is using a fast Fourier transform technique.
Claim 23
Dependent Claim
38 words
The device of claim 17 wherein said pressure signal means comprises a pressure cuff and at least a portion of the microprocessing means which detects changes in the conductance waveform signal as the pressure cuff is gradually deflated.
Claim 24
Dependent Claim
13 words
The device of claim 15 wherein said waveform signal means measures electrical impedance.
Claim 25
Dependent Claim
15 words
The device of claim 15 wherein said waveform signal means ultrasonically monitors arterial wall movement.
Claim 26
Dependent Claim
17 words
The device of claim 15 wherein said waveform signal means performs X-ray imaging of arterial wall movement.
Claim 27
Dependent Claim
13 words
The device of claim 15 wherein said waveform signal means performs microwave imaging.
Claim 28
Dependent Claim
13 words
The device of claim 15 wherein said waveform signal means performs NMR imaging.
Claim 29
Dependent Claim
13 words
The device of claim 15 wherein said waveform signal means makes colorimetric measurements.
Claim 30
Dependent Claim
21 words
The device of claim 15 further including means for determining pulse rate by counting waves in said continuous non-pressure waveform signal.
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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) | 1992-10-16 | 1993-04-17 | 1993-10-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1996-10-16 | 1997-04-17 | 1997-10-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2000-10-16 | 2001-04-17 | 2001-10-17 | $7700.00 | Window Closed / Lapsed |