GB1388129A - Method of and apparatus for the detection and recording of sound in the cardiovascular system - Google Patents
Method of and apparatus for the detection and recording of sound in the cardiovascular systemInfo
- Publication number
- GB1388129A GB1388129A GB1214372A GB1214372A GB1388129A GB 1388129 A GB1388129 A GB 1388129A GB 1214372 A GB1214372 A GB 1214372A GB 1214372 A GB1214372 A GB 1214372A GB 1388129 A GB1388129 A GB 1388129A
- Authority
- GB
- United Kingdom
- Prior art keywords
- sounds
- signals
- averager
- signal
- ecg
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired
Links
Classifications
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B5/00—Measuring for diagnostic purposes; Identification of persons
- A61B5/02—Detecting, measuring or recording pulse, heart rate, blood pressure or blood flow; Combined pulse/heart-rate/blood pressure determination; Evaluating a cardiovascular condition not otherwise provided for, e.g. using combinations of techniques provided for in this group with electrocardiography or electroauscultation; Heart catheters for measuring blood pressure
Landscapes
- Health & Medical Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Biomedical Technology (AREA)
- Molecular Biology (AREA)
- Physiology (AREA)
- Biophysics (AREA)
- Pathology (AREA)
- Engineering & Computer Science (AREA)
- Cardiology (AREA)
- Heart & Thoracic Surgery (AREA)
- Medical Informatics (AREA)
- Physics & Mathematics (AREA)
- Surgery (AREA)
- Animal Behavior & Ethology (AREA)
- General Health & Medical Sciences (AREA)
- Public Health (AREA)
- Veterinary Medicine (AREA)
- Measuring Pulse, Heart Rate, Blood Pressure Or Blood Flow (AREA)
- Measurement And Recording Of Electrical Phenomena And Electrical Characteristics Of The Living Body (AREA)
Abstract
1388129 Electro-medical apparatus HEWLETT-PACKARD CO 15 March 1972 [19 April 1971] 12143/72 Heading G1N Repetitive sounds in the cardiovascular system are analyzed by synchronizing detected sound signals with a periodic condition that is synchronous with the repeated sounds, averaging a plurality of sounds signals over a plurality of successive time periods to obtain a signal representing an average of the amplitudes of the sound signals, and displaying this signal. As shown, a microphone 11 placed over the heart of a body 12 detects heart beating, the amplified and filtered sound signals being applied to a demodulator 16 which provides an evelope of the high frequency signals passed by the filter 14. The output of the demodulater is applied to an averager 17 which is synchronized by the ECG signal of the patient. The signals are averaged over 2<SP>6</SP> ECG time periods, for example, and the output of the averager is displayed at 21. Various sounds produced in the cardiovascular system can be analyzed to investigate various conditions (list given in the Specification) including blood pressure and blood flow rate. When there is no built-in synchronizing signal such as the ECG, e.g. when investigating venous stenosis, cyclic venous flow rates may be produced artificially by mechanical means that repetitiously constrict the vein. The averager is then synchronized by the mechanical means.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US13535071A | 1971-04-19 | 1971-04-19 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB1388129A true GB1388129A (en) | 1975-03-26 |
Family
ID=22467704
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB1214372A Expired GB1388129A (en) | 1971-04-19 | 1972-03-15 | Method of and apparatus for the detection and recording of sound in the cardiovascular system |
Country Status (5)
| Country | Link |
|---|---|
| US (1) | US3762397A (en) |
| JP (1) | JPS4849286A (en) |
| DE (1) | DE2215543B2 (en) |
| FR (1) | FR2136492A5 (en) |
| GB (1) | GB1388129A (en) |
Families Citing this family (27)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3878832A (en) * | 1973-05-14 | 1975-04-22 | Palo Alto Medical Research Fou | Method and apparatus for detecting and quantifying cardiovascular murmurs and the like |
| DE2509660C3 (en) * | 1975-03-06 | 1984-10-25 | Hellige Gmbh, 7800 Freiburg | Device for monitoring the heart or pulse rate |
| DE2849030A1 (en) * | 1978-11-11 | 1980-05-22 | Rolf Neusel | Spurious signal suppression for blood pressure measuring - using systolic signal rise period for measuring signal derivation but blocking signal derivation in intervening period |
| US4519396A (en) * | 1979-03-30 | 1985-05-28 | American Home Products Corporation (Del.) | Fetal heart rate monitor apparatus and method for combining electrically and mechanically derived cardiographic signals |
| US4628939A (en) * | 1980-09-11 | 1986-12-16 | Hughes Aircraft Company | Method and improved apparatus for analyzing heart activity |
| US4428380A (en) | 1980-09-11 | 1984-01-31 | Hughes Aircraft Company | Method and improved apparatus for analyzing activity |
| US4592366A (en) * | 1984-04-16 | 1986-06-03 | Matsushita Electric Works, Ltd. | Automated blood pressure monitoring instrument |
| US4672977A (en) * | 1986-06-10 | 1987-06-16 | Cherne Industries, Inc. | Lung sound cancellation method and apparatus |
| JPH02500410A (en) * | 1986-08-05 | 1990-02-15 | ユニヴァーシティ オブ ウエイルズ カレッジ オブ メディシン | proximity detector |
| US4905706A (en) * | 1988-04-20 | 1990-03-06 | Nippon Colin Co., Ltd. | Method an apparatus for detection of heart disease |
| US4989611A (en) * | 1988-08-19 | 1991-02-05 | Seismed Instruments, Inc. | Cardiac compression wave measuring system and method |
| DE59209077D1 (en) * | 1992-06-09 | 1998-01-29 | Pacesetter Ab | Method and device for determining a physiological functional parameter of a living being |
| DK63193D0 (en) * | 1993-06-02 | 1993-06-02 | Bang & Olufsen Tech As | HEART SIGNAL MEASUREMENT APPARATUS |
| US5808903A (en) * | 1995-09-12 | 1998-09-15 | Entek Scientific Corporation | Portable, self-contained data collection systems and methods |
| US6801877B2 (en) | 1993-11-12 | 2004-10-05 | Entek Ird International Corporation | Portable, self-contained data collection systems and methods |
| NO300250B1 (en) | 1995-02-09 | 1997-04-28 | Meditron As | Apparatus for listening to body sounds |
| WO1997003600A2 (en) * | 1995-07-21 | 1997-02-06 | Stethtech Corporation | Electronic stethoscope |
| US6005951A (en) * | 1995-07-21 | 1999-12-21 | Stethtech Corporation | Electronic stethoscope |
| US6050950A (en) | 1996-12-18 | 2000-04-18 | Aurora Holdings, Llc | Passive/non-invasive systemic and pulmonary blood pressure measurement |
| CA2478912C (en) | 2002-03-18 | 2016-11-15 | Sonomedica, Llc | Method and system for generating a likelihood of cardiovascular disease from analyzing cardiovascular sound signals |
| US7559894B2 (en) * | 2003-09-18 | 2009-07-14 | New Paradigm Concepts, LLC | Multiparameter whole blood monitor and method |
| US20060287590A1 (en) * | 2003-09-18 | 2006-12-21 | Mceowen Edwin L | Noninvasive vital sign measurement device |
| GB2426586A (en) * | 2005-05-24 | 2006-11-29 | Univ Wolverhampton | Passive acoustic blood circulatory system analyser |
| GB201020381D0 (en) * | 2010-12-02 | 2011-01-12 | Crane John Uk Ltd | Component failure detection system |
| US11045163B2 (en) | 2017-09-19 | 2021-06-29 | Ausculsciences, Inc. | Method of detecting noise in auscultatory sound signals of a coronary-artery-disease detection system |
| US20190117165A1 (en) | 2017-10-20 | 2019-04-25 | Jikang ZENG | Coronary artery disease detection signal processing system and method |
| US11284827B2 (en) | 2017-10-21 | 2022-03-29 | Ausculsciences, Inc. | Medical decision support system |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| NL291827A (en) * | 1961-03-17 |
-
1971
- 1971-04-19 US US00135350A patent/US3762397A/en not_active Expired - Lifetime
-
1972
- 1972-03-15 GB GB1214372A patent/GB1388129A/en not_active Expired
- 1972-03-30 DE DE2215543A patent/DE2215543B2/en active Pending
- 1972-04-18 FR FR7213570A patent/FR2136492A5/fr not_active Expired
- 1972-04-19 JP JP47039509A patent/JPS4849286A/ja active Pending
Also Published As
| Publication number | Publication date |
|---|---|
| JPS4849286A (en) | 1973-07-11 |
| DE2215543A1 (en) | 1972-11-09 |
| DE2215543B2 (en) | 1975-02-06 |
| FR2136492A5 (en) | 1972-12-22 |
| US3762397A (en) | 1973-10-02 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| GB1388129A (en) | Method of and apparatus for the detection and recording of sound in the cardiovascular system | |
| US4137910A (en) | Method and means for measuring cardiac pumping performance of left ventricle | |
| US4379460A (en) | Method and apparatus for removing cardiac artifact in impedance plethysmographic respiration monitoring | |
| US4732158A (en) | Method and apparatus for monitoring electrocardiogram (ECG) signals | |
| US4446872A (en) | Method and apparatus for determining systolic time intervals | |
| US4334545A (en) | Biofeedback system | |
| WO1990008503A1 (en) | Dynamic spectral phonocardiograph | |
| US9713430B2 (en) | Acoustic sensors for abdominal fetal cardiac activity detection | |
| GB1330506A (en) | Rheoplethysmograph | |
| US5564428A (en) | Method and apparatus for enhancing the signal-to-noise ratio of ECG signals | |
| GB1460413A (en) | Method of and apparautus for measuring blood pressure polyurethane elastomers | |
| GB1276116A (en) | Improvements in or relating to monitoring circuits for operating on electro-medical signals | |
| US3101082A (en) | Apparatus for measuring systolic and diastolic blood pressures | |
| EP0748637A2 (en) | Pacemaker pulse detection and artifact rejection | |
| US4823804A (en) | Apparatus for monitoring activity level of human organ | |
| US3229687A (en) | Electrocardio recording and reproducing system | |
| JPH0852117A (en) | Patient monitor | |
| GB1481117A (en) | Blood pressure measuring apparatus | |
| GB1398429A (en) | Arrhythia detecting method and apparatus | |
| Horoba et al. | Algorithm for detection of uterine contractions from electrohysterogram | |
| US3881481A (en) | Left ventricular ejection meter | |
| Lu et al. | Removal of the heart sound noise from the breath sound | |
| RU95108325A (en) | DEVICE AND METHODS FOR MONITORING, BRAIN WAVE SIGNATURE, Cognitive state of personality | |
| GB1299938A (en) | Monitoring apparatus | |
| Alperin et al. | An improved method for on-line averaging and detecting of ECG waveforms |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PS | Patent sealed [section 19, patents act 1949] | ||
| PLNP | Patent lapsed through nonpayment of renewal fees |