Patent US3920004A successfully refreshed from Google Patents.
US3920004A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Device and method for noninvasive measurement of blood pressure, resistance inertance, compliance, impedance, blood flow rate, kinetic energy, flow velocity and pulse velocity of a segment in man
Assignee: Individual
•
Filing: 1974-04-03
•
Granted: 1975-11-18
•
Expires: 1994-04-03
Abstract
Abstract A device for noninvasively measuring various parameters characteristic of a blood circulation system within a human being includes a volume measuring device secured to a specific part of the human being for measuring changes in the blood flow volume therethrough, and a pressure measuring device, also secured to the specific part and spaced from the volume measuring device a pre-determined distance, for measuring the changes in pressure within the specific body part. Transducers convert the sensed volume and pressure values into electrical signals which are transmitted to suitable recording means whereby such recorded values, which are functions of time, may be utilized for determining the desired parameters.
Inventors
- 👤 Ryu Nakayama
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 16:14
CPC Classifications
A; A61; A61B; A61B5/00; A61B5/02; A61B5/021; A61B5/022
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
190 words
A device for the noninvasive measurement of blood pressure, compliance, resistance, inertance, impedance, blood flow rate, blood flow velocity, blood flow kinetic energy and pulse wave velocity parameters within a specific part of a human being comprising: volume measuring means adapted to be secured to said specific part of said human being for measuring changes in the blood flow volume within said specific part of said human being and for generating a first set of signals in response to said changes in said blood flow volume; pressure measuring means adapted to be secured to said specific part of said human being and separated from said volume measuring means a predetermined distance for measuring changes in pressure within said specific part of said human being and for generating a second set of signals in response to said changes in said pressure; means for simultaneously recording said first and second set of generated signals as functions of time; and means for determining blood pressure, compliance, resistance, inertance, impedance, blood flow rate, flood flow velocity, blood flow kinetic energy and pulse wave velocity from said recorded first and second set of generated signals.
Claim 2
Independent Claim
190 words
A device for the noninvasive measurement of blood pressure, compliance, resistance, inertance, impedance, blood flow rate, blood flow velocity, blood flow kinetic energy and pulse wave velocity parameters within a specific part of a human being comprising: volume measuring means adapted to be secured to said specific part of said human being for measuring changes in the blood flow volume within said specific part of said human being and for generating a first set of signals in response to said changes in said blood flow volume; pressure measuring means adapted to be secured to said specific part of said human being and separated from said volume measuring means a predetermined distance for measuring changes in pressure within said specific part of said human being and for generating a second set of signals in response to said changes in said pressure; means for simultaneously recording said first and second set of generated signals as functions of time; and means for determining blood pressure, compliance, resistance, inertance, impedance, blood flow rate, flood flow velocity, blood flow kinetic energy and pulse wave velocity from said recorded first and second set of generated signals.
Claim 3
Dependent Claim
64 words
A device as set forth in claim 1 wherein said volume measuring means comprises: a capsule adapted to be secured to said specific part of said human being in an air-tight manner so as to accurately sense said volume changes within said part; and a piezo-electric crystal transducer associated with said capsule for converting said sensed volume changes to said first set of signals.
Claim 4
Dependent Claim
65 words
A device as set forth in claim 1 wherein said pressure measuring means comprises: a cuff adapted to be secured to said specific part of said human being in an air-tight manner so as to accurately sense said pressure changes within said measuring device; and a piezo-electric crystal transducer associated with said cuff for converting said sensed pressure changes to said second set of signals.
Claim 5
Dependent Claim
26 words
A device as set forth in claim 1 wherein said means for simultaneously recording said first and second sets of signals comprises a digital computer. Pg,25
Claim 6
Independent Claim
163 words
A method of noninvasively measuring blood pressure, compliance, resistance, inertance, impedance, blood flow rate, blood flow velocity, blood flow kinetic energy, and pulse wave velocity parameters with a specific part of a human being comprising: securing pressure measuring means and volume measuring means to said specific part of said human being; pressurizing said pressure measuring means to generate a first set of signals as a function of time indicative of the changes of blood flow volume within said specific part of said human being and a second set of signals as a function of time indicative of the changes of pressure within said specific part of said human being, said first set of signals comprising a volume pulse wave; simultaneously recording said first and second set of signals as functions of time; and determining blood pressure, compliance, resistance, inertance, impedance, blood flow rate, blood flow velocity, blood flow kinetic energy and pulse wave velocity from said recorded first and second set of signals.
Claim 7
Independent Claim
163 words
A method of noninvasively measuring blood pressure, compliance, resistance, inertance, impedance, blood flow rate, blood flow velocity, blood flow kinetic energy, and pulse wave velocity parameters with a specific part of a human being comprising: securing pressure measuring means and volume measuring means to said specific part of said human being; pressurizing said pressure measuring means to generate a first set of signals as a function of time indicative of the changes of blood flow volume within said specific part of said human being and a second set of signals as a function of time indicative of the changes of pressure within said specific part of said human being, said first set of signals comprising a volume pulse wave; simultaneously recording said first and second set of signals as functions of time; and determining blood pressure, compliance, resistance, inertance, impedance, blood flow rate, blood flow velocity, blood flow kinetic energy and pulse wave velocity from said recorded first and second set of signals.
Claim 8
Dependent Claim
44 words
A method as set forth in claim 5 further comprising the steps of: recording the amplitude of said volume pulse wave; and recording the radial pressure difference corresponding to said amplitude of said volume pulse wave so that said precapillary compliance may be determined.
Claim 9
Dependent Claim
71 words
A method as set forth in claim 5 further comprising the steps of: securing said pressure measuring means to said part of said human being at a point located a predetermined distance from said volume measuring means; and recording the time difference between the onset of the pressure and volume pulse waves as a result of said pressurization of said pressure measuring means so that said pulse velocity may be determined.
Claim 10
Dependent Claim
63 words
A method as set forth in claim 5 further comprising the steps of: recording the particular pressure signal of said second set of signals which correspond to the systolic pressure; and recording the particular pressure signal of said second set of signals which correspond to the diastolic pressure so that the arterial pressure within said part of said human being may be determined.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1978-11-17 | 1979-05-19 | 1979-11-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-11-17 | 1983-05-19 | 1983-11-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-11-17 | 1987-05-19 | 1987-11-18 | $7700.00 | Window Closed / Lapsed |