GB2188732A - Portable computer apparatus for the display of a phonocardiogram and an electrocardiogram - Google Patents
Portable computer apparatus for the display of a phonocardiogram and an electrocardiogram Download PDFInfo
- Publication number
- GB2188732A GB2188732A GB08608408A GB8608408A GB2188732A GB 2188732 A GB2188732 A GB 2188732A GB 08608408 A GB08608408 A GB 08608408A GB 8608408 A GB8608408 A GB 8608408A GB 2188732 A GB2188732 A GB 2188732A
- Authority
- GB
- United Kingdom
- Prior art keywords
- computer apparatus
- portable computer
- transducer means
- phonocardiogram
- electrocardiogram
- 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.)
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Classifications
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B7/00—Instruments for auscultation
- A61B7/02—Stethoscopes
- A61B7/04—Electric stethoscopes
-
- 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
- A61B5/021—Measuring pressure in heart or blood vessels
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B5/00—Measuring for diagnostic purposes; Identification of persons
- A61B5/24—Detecting, measuring or recording bioelectric or biomagnetic signals of the body or parts thereof
- A61B5/316—Modalities, i.e. specific diagnostic methods
- A61B5/318—Heart-related electrical modalities, e.g. electrocardiography [ECG]
- A61B5/332—Portable devices specially adapted therefor
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R13/00—Arrangements for displaying electric variables or waveforms
- G01R13/40—Arrangements for displaying electric variables or waveforms using modulation of a light beam otherwise than by mechanical displacement, e.g. by Kerr effect
- G01R13/404—Arrangements for displaying electric variables or waveforms using modulation of a light beam otherwise than by mechanical displacement, e.g. by Kerr effect for discontinuous display, i.e. display of discrete values
- G01R13/405—Arrangements for displaying electric variables or waveforms using modulation of a light beam otherwise than by mechanical displacement, e.g. by Kerr effect for discontinuous display, i.e. display of discrete values using a plurality of active, i.e. light emitting, e.g. electro-luminescent elements, i.e. bar graphs
-
- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09B—EDUCATIONAL OR DEMONSTRATION APPLIANCES; APPLIANCES FOR TEACHING, OR COMMUNICATING WITH, THE BLIND, DEAF OR MUTE; MODELS; PLANETARIA; GLOBES; MAPS; DIAGRAMS
- G09B23/00—Models for scientific, medical, or mathematical purposes, e.g. full-sized devices for demonstration purposes
- G09B23/28—Models for scientific, medical, or mathematical purposes, e.g. full-sized devices for demonstration purposes for medicine
-
- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09B—EDUCATIONAL OR DEMONSTRATION APPLIANCES; APPLIANCES FOR TEACHING, OR COMMUNICATING WITH, THE BLIND, DEAF OR MUTE; MODELS; PLANETARIA; GLOBES; MAPS; DIAGRAMS
- G09B5/00—Electrically-operated educational appliances
- G09B5/06—Electrically-operated educational appliances with both visual and audible presentation of the material to be studied
- G09B5/065—Combinations of audio and video presentations, e.g. videotapes, videodiscs, television systems
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- Health & Medical Sciences (AREA)
- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Life Sciences & Earth Sciences (AREA)
- General Physics & Mathematics (AREA)
- General Health & Medical Sciences (AREA)
- Medical Informatics (AREA)
- Public Health (AREA)
- Veterinary Medicine (AREA)
- Biomedical Technology (AREA)
- Heart & Thoracic Surgery (AREA)
- Cardiology (AREA)
- Molecular Biology (AREA)
- Surgery (AREA)
- Animal Behavior & Ethology (AREA)
- Theoretical Computer Science (AREA)
- Educational Technology (AREA)
- Biophysics (AREA)
- Acoustics & Sound (AREA)
- Educational Administration (AREA)
- Pathology (AREA)
- Business, Economics & Management (AREA)
- Medicinal Chemistry (AREA)
- Computational Mathematics (AREA)
- Mathematical Analysis (AREA)
- Mathematical Optimization (AREA)
- Mathematical Physics (AREA)
- Pure & Applied Mathematics (AREA)
- Algebra (AREA)
- Chemical & Material Sciences (AREA)
- Vascular Medicine (AREA)
- Physiology (AREA)
- Multimedia (AREA)
- Measurement And Recording Of Electrical Phenomena And Electrical Characteristics Of The Living Body (AREA)
- Measuring And Recording Apparatus For Diagnosis (AREA)
Abstract
Portable computer apparatus for the display of a phonocardiogram and an electrocardiogram of a person comprises a microphone transducer 6 for obtaining data for the phonocardiogram electrodes 8 for obtaining data for the electrocardiogram, a housing 4 containing a computer for receiving signals from the microphone transducer 6 and the electrodes 8, and a flat display screen 14 for displaying the phonocardiogram and the electrocardiogram consequent upon signals received from the computer 12. The carotid pressure pulse may also be displayed by means of a pressure sensor comprising a latex balloon 30 in the end of a metal tube 28 connected by a thin polythene tube to a pressure transducer 38. <IMAGE>
Description
SPECIFICATION
Portable computer apparatus for the display of a phonocardiogram and an electrocardiogram of a person
This invention relates to portable computer apparatus for the display of a phonocardiogram and electrocardiogram of a person.
An essential part of the routine medical examination of the cardiovascular system of a person consists of listening to the sounds of the person's heart, using a stethoscope applied to the chest wall. A doctor may just listen to the sounds or he may listen to the sounds and then attempt to draw the sounds on a piece of paper which is retained in the notes of a person such as a pateint. Accurate recognition of normal heart sounds and the detection of an abnormal additional sound or murmour relies greatly on the skill of the doctor and in difficult cases, the test may at best be said to be open to subjective interpretation.
It is possible to record heart sounds electronically using a microphone applied to the chest wall to obtain a phonocardiogram. The known equipment which records the heart sounds electronically is cumbersome and it is not normally possible to move the equipment from place to place. Thus an examination to obtain a phonocardiogram cannot be performed at a patient's bedside or in a consultation room and a separate room is required and the doctor and the patient have to travel to that room. This is clearly not always convenient and can sometimes be dangerous for the patient.
It is an aim of the present invention to provide computer apparatus which obviates or reduces the above mentioned problems and which, more specifically, enables accurate measurements to be taken at any desired place such for example as a patient's bedside or a doctor's consultation room.
Accordingly, this invention provides portable computer apparatus for the display of a phonocardiogram and an electrocardiogram of a person, which portable computer apparatus comprises a housing, microphone transducer means for obtaining data for the phonocardiogram, electrode transducer means for obtaining data for the electrodcardiogram, computer means for receiving signals from the microphone transducer means and the electrode transducer means, and a flat display screen for displaying the phonocardiogram and the electrocardiogram consequent upon signals received from the computer means.
The phonocardiogram and the electrocardiogram can be displayed on the flat screen in graphical form in order to facilitate the objective analysis of the measurements taken.
The microphone transducer means may have a thin flexible plastics diaphram.
The microphone transducer means may feed signals for the phonocardiogram to a filter and envelope detection unit.
The electrode transducer means may feed signals for the electrocardiogram to amplify means for amplifying the signals.
The portable computer apparatus preferably includes pressure transducer means which is responsive to a person's carotid pressure pulse so that the pressure transducer means is able to obtain data for a display of the person's carotid pressure pulse, whereby the portable computer apparatus is also able to display the carotid pressure pulse of the person.
The pressure transducer means may be a pneumatic pressure transducer means.
Preferably, the pneumatic pressure transducer means is in the form of an elongate probe.
The probe may comprise a casing having a balloon so positioned in the casing that a tip of the balloon is available for placing against the neck of the person at that part of the neck where the carotid pressure pulse can be felt, the other end of the balloon being connected to a tube, and the tube being connected to a pressure transducer.
The balloon may be a latex balloon.
Advantageously, the portable computer apparatus is battery operated.
The portable computer apparatus is preferably only battery operated since this enables the portable computer apparatus to easily be carried and virtually instantaneously operated without the need for finding a mains source of electricity. If desired however, the portable computer apparatus may have the facility of being mains operated.
The portable computer apparatus may also have a battery recharging facility in case it is desired to use the portable computer apparatus with rechargable batteries.
The portable computer apparatus is preferably of a size that can fit into a pocket, for example the pocket of a hospital coat. Thus the portable computer apparatus is hand-holdable and can easily be carried from place to place.
The flat display screen may be a liquid crystal dot-matrix graphics flat display screen, a gas plasma flat display screen, or an electrophosphorescent flat display screen.
The portable computer apparatus may include an analogue to digital converter for receiving analogue signals and converting them into digital signals for the computer means.
The computer means may include software which takes the signals and displays them on the flat display screen.
The signals may be handled using an envelope mode. In order to get desired resolution, the portable computer apparatus may be such that the desired wave form, for example of the phonocardiogram or the electrocardiogram, is not displayed in its entirety but, instead, only the envelope of the wave form is displayed.
The portable computer apparatus may in clude a printer. The printer may then enable a hard copy print out of the or each desired wave form, in order to eliminate errors in writing, to be obtained.
The computer means may be micro computer.
The computer means may be used to facilitate the analysis of the phonocardiogram, the electrocardiogram and the display of the carotid pressure pulse.
The housing may be provided with appropriate controls. The controls may include a contrast control, a gain control, an on/off switch, a freeze frame control for holding a particular display, a hard copy control, a select control for selecting which particular wave form or which combination of wave forms to display, and a select control for displaying a wave form in more detail.
The portable computer apparatus may also include a key pad.
The portable computer apparatus may also have a facility for giving an alpha numeric display. The alpha numeric display may be used for giving details of, for example, a patient's heart rate.
An embodiment of the invention will now be described solely by way of example and with reference to the accompanying drawings in which:
Figure 1 illustrates in block diagram form the portable computer apparatus;
Figure 2 shows the operation of the envelope detection unit shown in Fig. 1; and
Figure 3 shows the portable computer apparatus of Fig. 1 as it may be used.
Referring to the drawings, there is shown portable computer apparatus 2 for the display of a phonocardiogram, an electrocardiogram and a carotid pressure pulse of a person. The computer apparatus 2 comprises a housing 4, microphone transducer means 6 for obtaining data for the phonocardiogram, electrode transducer means 8 for obtaining data for the electrocardiogram, and pressure transducer means 10 which is responsive to a person's carotid pressure pulse for obtaining data for the display of the carotid pressure pulse. The computer apparatus 2 further comprises computer means in the form of a micro computer 12 for receiving signals from the microphone transducer means 6, the electrode transducer means 8 and the pressure transducer means 10.The computer apparatus 2 further comprises a flat screen 14 for displaying the phonocardiogram, the electrocardiogram and the carotid pressure pulse consequent upon signals received from the micro computer 12, the signals being received along line 16.
The microphone transducer means 6 preferably comprises a thin flexible plastics diaphram (not shown). The microphone transducer meand 6 feeds signals for the phonocardiogram along a lead 18 to a filter and envelope detection unit 20. The filter and envelope detection unit 20 may also receive signals from the micro computer 12 via a lead 22.
The electrode transducer means 8 feeds signals for the electrocardiogram to amplifier means 24 via a lead 26.
The pressure transducer means 10 is a pneumatic pressure transducer means in the form of an elongate probe. The pressure transducer means 10 comprises a metal casing 28 having a latex balloon 30 so positioned in the casing 28 that a tip 32 of the balloon 30 is available for placing against the neck of a person at that part of the neck where the carotid pressure pulse can be felt. The other end 34 of the balloon 30 is connected to a thin polythene tube 36 which is connected to a pressure transducer 38, the pressure transducer 38 being shown in both Figs. 1 and 3.
As shown in Fig. 1, the filter and envelope detection unit 20, the amplifier means 24 and the pressure transducer 38 are connected by leads 40, 42, 44 respectively to an analogue to digital converter 46. The analogue to digital converter 46 receives analogue signals from the leads 40, 42, 44 and converts the signals into digital signals which are passed via a lead 48 to the micro computer 12. Software in the micro computer 12 processes the signals and sends them to the flat screen 14 for appropriate display, via the leads 16. The analogue to digital converter 46 and the micro computer 12 may be regarded as acting together and forming part of overall computer means.
The micro computer 12 may have the facility of providing a hard copy print out to a printer 50 via a lead 52.
The flat display screen 14 is preferably a liquid crystal dot matrix graphics flat display screen 14 but it may alternatively be a gas plasma flat display screen, or an electrqphos- phorescent flat display screen.
The computer apparatus 2 is solely battery operated. This enables the computer apparatus 2 to be used without the need to look for a mains power source. Also, costs involved in providing facilities for mains power operation are avoided.
The overall computer means employed in the computer apparatus 2 shown in the drawings may have the facility for enabling the analysis of the information received as may be desired.
The housing 4 is provided with a control panel 54 and this control panel 54 may be provided with a contrast knob, a gain knob, an on/off switch, a freeze frame button, a hard copy button, a select button for selecting which wave form or wave forms are required to be displayed, a select button for enabling the detailed examination of a selected wave form, and a knob for adjusting the high and low frequency cut of points for the phonocardiogram.
Referring especially to Fig. 2, a known conventional phonocardiogram displays the acoustic wave form from the microphone in an unprocessed form. This precludes an accurate assessment of the frequency content of the signal. In the computer apparatus 2, the raw signal is band pass filtered in the filter and envelope unit 20 and the envelope of the signal is displayed as shown in the Fig. 2(a). By adjusting the high and low frequency cut-off points of the filter, the frequency content of any part of the signal may be examined. Display of the signal envelope also eliminates problems associated with the limited resolution of the display.
Fig. 2 illustrates the steps involved in the processing of the phonocardiogram signal. As illustrated in Fig. 2(a) the signal is first band pass filtered. It is then full wave rectified as shown in Fig. 2(b). The maxima of the rectified signal over a time period corresponding to the horizontal resolution of the display is then obtained via a peak detector, the output of which is sequentially read and reset by a micro processor in the micro computer 12.
This is illustrated in Fig. 2(c). The signal thus obtained is displayed in real time on the display in the same way as an electrocardiogram signal is displayed on a standard known monitor, see Fig. 2(d).
The electrode transducer means 8 gives a three lead electrocardiogram which is recorded and displayed to give the timing of events in relation to the cardiac cycle.
In the pressure transducer means 10, the casing 28 is preferably a cylindrical metal tube. Also, the tube 36 is preferably a thin flexible polythene tube. The signal from the pressure transducer 38 is high pass filtered and displayed in a similar manner to the phonocardiogram signal.
The portable computer apparatus 2 may have four main areas of application, these being as follows:
Teaching
1) When teaching medical students, it is often difficult to accurately describe what is being heard through the stethescope. A visual display of the envelope of the acoustic signal is an ideal method of describing the sound. Thus the computer apparatus 2 facilitates the teaching of medical students in general, and especially small groups of the students where they can listen to a patient's heart sounds and see the equivalent displays.
2) Routine use and documentation
Experienced clinicians will appreciate a visual display of the heart sounds and the carotid pressure pulse. A hard copy of these traces will provide objective documentation of a patient's status.
3) Research
Since the sampling and processing of transducers signals is entirely under software control, sophisticated analysis of the signals is possible. For example, it may be possible to average the heart sounds over several cardiac cycles in order to improve the accuracy of the phonocardiogram. Also, the second heart sound alone may be displayed with high resolution in order to investigate splitting of the second sound due to asynchronous closure of the pulmonary and aortic valves.
4) Specialised sounds
The computer apparatus 2 may be of considerable use in situations such as are encountered in paediatrics where sounds may be difficult to hear and perhaps amplification is required.
It is to be appreciated that the embodiment of the invention described above has been given by way of example only and that modifications may be effected. Thus, for example, the computer apparatus 2 may also be capable of mains operation if desired. Also, the computer apparatus 2 may be provided with the facility of giving an alpha numeric display.
Claims (17)
1. Portable computer apparatus for the display of a phonocardiogram and an electrocardiogram of a person, which portable computer apparatus comprises a housing, microphone transducer means for obtaining data for the phonocardiogram, electrode transducer means for obtaining data for the electrocardiogram, computer means for receiving signals from the microphone transducer means and the electrode transducer means, and a flat display screen for displaying the phonocardiogram and the electrocardiogram consequent upon signals received from the computer means.
2. Portable computer apparatus according to claim 1 in which the microphone transducer means has a thin flexible plastics diaphragm.
3. Portable computer apparatus according to claim 1 or claim 2 in which the microphone transducer means feeds signals for the phonocardiogram to a filter and envelope detection unit.
4. Portable computer apparatus according to any one of the preceding claims in which the electrode transducer means feeds signals for the electrocardiogram to amplifier means for amplifying the signals.
5. Portable computer apparatus according to any one of the preceding claims and including pressure tranducer means which is responsive to a person's carotid pressure pulse so that the pressure transducer means is able to obtain data for a display of the person's carotid pressure pulse, whereby the portable com puter apparatus is also able to display the carotid pressure pulse of the person.
6. Portable computer apparatus according to claim 5 in which the pressure transducer means is a pneumatic pressure transducer means.
7. Portable computer apparatus according to claim 6 in which the pneumatic pressure transducer means is in the form of an elongate probe.
8. Portable computer apparatus according to claim 7 in which the probe comprises a casing having a balloon so positioned in the casing that a tip of the balloon is available for placing against the neck of the person at that part of the neck where the carotid pressure pulse can be felt, the other end of the balloon being connected to a tube, and the tube being connected to a pressure transducer.
9. Portable computer apparatus according to claim 8 in which the balloon is a latex balloon.
10. Portable computer apparatus according to any one of the preceding claims and which is battery operated.
11. Portable computer apparatus according to any one of the preceding claims in which the flat display screen is a liquid crystal dotmatrix graphics flat display screen, a gas plasma flat display screen, or an electrophosphorescent flat display screen.
12. Portable computer apparatus according to any one of the preceding claims including an analogue to digital converter for receiving analogue signals and converting them into digital signals for the computer means.
13. Portable computer apparatus according to any one of the preceding claims and including a printer.
14. Portable computer apparatus according to any one of the preceding claims in which the housing is provided with a contrast control, a gain control, an on/off switch, a freeze frame control for holding a particular display, a hard copy control, a select control for selecting which particular wave form or which combination of wave forms to display, and select control for displaying a wave form in more detail.
15. Portable computer apparatus according to any one of the preceding claims and including a key pad.
16. Portable computer apparatus according to any one of the preceding claims and including means for giving an alpha numeric display.
17. Portable computer apparatus substantially as herein described with reference to the accompanying drawings.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB8608408A GB2188732B (en) | 1986-04-07 | 1986-04-07 | Portable computer apparatus for the display of a phonocardiogram and an electrocardiogram of a person |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB8608408A GB2188732B (en) | 1986-04-07 | 1986-04-07 | Portable computer apparatus for the display of a phonocardiogram and an electrocardiogram of a person |
Publications (3)
| Publication Number | Publication Date |
|---|---|
| GB8608408D0 GB8608408D0 (en) | 1986-05-14 |
| GB2188732A true GB2188732A (en) | 1987-10-07 |
| GB2188732B GB2188732B (en) | 1990-04-04 |
Family
ID=10595792
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB8608408A Expired - Lifetime GB2188732B (en) | 1986-04-07 | 1986-04-07 | Portable computer apparatus for the display of a phonocardiogram and an electrocardiogram of a person |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB2188732B (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2240392A (en) * | 1990-01-17 | 1991-07-31 | Rory Joseph Donnelly | Acoustic monitor for vital functions |
| EP0467503A1 (en) * | 1990-07-19 | 1992-01-22 | William Edgar Thornton | Improved cardiovascular monitoring system |
| US5337752A (en) * | 1992-05-21 | 1994-08-16 | Mcg International, Inc. | System for simultaneously producing and synchronizing spectral patterns of heart sounds and an ECG signal |
| WO2005046448A2 (en) * | 2003-11-10 | 2005-05-26 | Zargis Medical Corporation | A handheld auscultatory scanner with synchronized display of heart sounds |
| EP1946699A2 (en) | 2007-01-20 | 2008-07-23 | Heat GmbH | Device for gathering cardiological examination data from a patient |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6193668B1 (en) | 1997-11-10 | 2001-02-27 | Medacoustics, Inc. | Acoustic sensor array for non-invasive detection of coronary artery disease |
| US6278890B1 (en) | 1998-11-09 | 2001-08-21 | Medacoustics, Inc. | Non-invasive turbulent blood flow imaging system |
| US6261237B1 (en) | 1998-08-20 | 2001-07-17 | Medacoustics, Inc. | Thin film piezoelectric polymer sensor |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4154231A (en) * | 1977-11-23 | 1979-05-15 | Russell Robert B | System for non-invasive cardiac diagnosis |
| US4362164A (en) * | 1980-09-11 | 1982-12-07 | Hughes Aircraft Company | Electronic pick-up device for transducing electrical energy and sound energy of the heart |
| US4428380A (en) * | 1980-09-11 | 1984-01-31 | Hughes Aircraft Company | Method and improved apparatus for analyzing activity |
-
1986
- 1986-04-07 GB GB8608408A patent/GB2188732B/en not_active Expired - Lifetime
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4154231A (en) * | 1977-11-23 | 1979-05-15 | Russell Robert B | System for non-invasive cardiac diagnosis |
| US4362164A (en) * | 1980-09-11 | 1982-12-07 | Hughes Aircraft Company | Electronic pick-up device for transducing electrical energy and sound energy of the heart |
| US4428380A (en) * | 1980-09-11 | 1984-01-31 | Hughes Aircraft Company | Method and improved apparatus for analyzing activity |
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2240392A (en) * | 1990-01-17 | 1991-07-31 | Rory Joseph Donnelly | Acoustic monitor for vital functions |
| EP0467503A1 (en) * | 1990-07-19 | 1992-01-22 | William Edgar Thornton | Improved cardiovascular monitoring system |
| US5337752A (en) * | 1992-05-21 | 1994-08-16 | Mcg International, Inc. | System for simultaneously producing and synchronizing spectral patterns of heart sounds and an ECG signal |
| WO2005046448A2 (en) * | 2003-11-10 | 2005-05-26 | Zargis Medical Corporation | A handheld auscultatory scanner with synchronized display of heart sounds |
| WO2005046448A3 (en) * | 2003-11-10 | 2005-12-01 | Zargis Medical Corp | A handheld auscultatory scanner with synchronized display of heart sounds |
| US7300407B2 (en) * | 2003-11-10 | 2007-11-27 | Zargis Medical Corporation | Handheld auscultatory scanner with synchronized display of heart sounds |
| EP1946699A2 (en) | 2007-01-20 | 2008-07-23 | Heat GmbH | Device for gathering cardiological examination data from a patient |
| EP1946699A3 (en) * | 2007-01-20 | 2011-12-07 | Heat GmbH | Device for gathering cardiological examination data from a patient |
Also Published As
| Publication number | Publication date |
|---|---|
| GB2188732B (en) | 1990-04-04 |
| GB8608408D0 (en) | 1986-05-14 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PCNP | Patent ceased through non-payment of renewal fee |