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Publication numberUS3858575 A
Publication typeGrant
Publication dateJan 7, 1975
Filing dateMay 24, 1973
Priority dateMar 5, 1973
Also published asDE2310953A1, DE2310953B2, DE2310953C3
Publication numberUS 3858575 A, US 3858575A, US-A-3858575, US3858575 A, US3858575A
InventorsRose Ewald
Original AssigneeRose Ewald
Export CitationBiBTeX, EndNote, RefMan
External Links: USPTO, USPTO Assignment, Espacenet
Body noise detector
US 3858575 A
Abstract
A body noise detector, includes a housing having a first chamber therein containing a microphone capsule and a second reduced-pressure chamber therein closed on one side by a resilient deformable wall, and connected to an annular groove surrounding a pad attached to the microphone capsule. The deformable wall is loaded by a spring against pressing into the reduced-pressure chamber. In one embodiment a lever carrying a pressure roller is pivoted on the housing so that the pressure roller can press upon the deformable wall.
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United States Patent [1 1 Rose 1 1 Jan. 7, 1975 1 BODY NOISE DETECTOR [76] Inventor: Ewald Rose, August-Antz-Strasse 25, 55 Trier-Ehrang, Germany [22] Filed: May 24, 1973 [21] Appl. No.: 363,582

[30] Foreign Application Priority Data Mar. 5, 1973 Germany: 2310953 [52] US. Cl. l28/2.05 S, 128/2 K [51] Int. CL; A6lb 5/02 [58] Field of Search... 128/205 S, 2 K, 418, 2.05 P, 128/206 E, 2.1 E, DIG. 4, 404-405, 410-411, 416-417, 278. 300, 172.1

[56] References Cited UNITED STATES PATENTS 1,585,104 5/1926 Montgomery 128/404 1,805,471 5/1931 England 128/300 2,580,628 1/1952' Welsh 128/DIG. 4

FOREIGN PATENTS OR APPLICATIONS 6/1961 Germany 128/418 921,396 3/1963 Great Britain 128/205 S Primary Examiner-Richard A. Gaudet Assistant Examiner-Lee S. Cohen Attorney, Agent, or Firm-Robert W. Beach; R. M. Van Winkle [57] ABSTRACT A body noise detector, includes a housing having a first-chamber therein containing a microphone capsule and a second reduced-pressure chamber therein closed on one side by a resilient deformable wall, and connected to an annular groove surrounding a pad attached to the microphone capsule. The deformable wall is loaded by a spring against pressing into the reduced-pressure chamber. lnone embodiment a lever carrying a pressure roller is pivoted on the housing so wall.

4 Claims, 2 Drawing Figures that the pressure roller can press upon the deformable Patented Jan. 7, 1975 r 3,858,575

2 Sheets-Sheet 1 L E: Z I

Patented Jan. 7, 1975 2 Sheets-Sheet 2 a 3 w 4 k as a w 0 Fig- 2 1 BODY NOISE DETECTOR BACKGROUND OF THE INVENTION The invention relates to a device for detecting heartnoise and other bodily noises for diagnostic purposes. The human body has skin which is, generally speaking, loose or flaccid as it is supported on a layer of fat.

Devices of this kind have been proposed consisting of a housing having a chamber which is open to the skin and carries, for example, a microphone capsule, and has an annular contact surface with an annular channel therein which is connected to a device producing suction. This serves to tauten the skin of the patient to enable bodily sounds to be detected.

Measurements have shown that the energy content of the sound transmitted by the taut skin is dependent upon the level of its tension. This could lead to heart noise being recorded with differing amplitudes and intensities due entirely to differences in skin tension. Similarly, real differences could be masked by such differences of skin tension. Faulty diagnosis leading to wrong treatment or the omission of treatment could result from this.

In order to obtain results which are comparable, it is necessary to ensure that the tension of the skin is the same when each reading is taken. In effect this means that the underpressure or suction must be exactly reproducible from one use of the device to the next.

It is accordingly an object of the invention to provide a detector for detecting bodily sounds such as heart noises in which the underpressure or suction is exactly reproducible from one use of the detector to the next.

SUMMARY OF THE INVENTION The invention provides, to achieve this object, that the housing of the detector encloses a chamber connected to the annular channel. This chamber is separate from the chamber containing the microphone capsule and is provided on one side with a resilient deformable wall which can be pressed into the chamber and then return to its former state.

The resilient deformable wall may be an elastic rubber diaphragm, and a spring may be disposed in the chamber to oppose depression of the diaphragm, and to act to retain the diaphragm after depression thereof. The spring may abut at one end against the wall of the chamber opposite the diaphragm and at the other, against a contact plate which contacts the diaphragm. A stop for the pressure plate is arranged on the interior of the wall of the chamber.

In a further development, finger supports or grips are provided on the exterior of the housing. A lever may also be pivoted on the housing at one side thereof, and the lever has a free end which is designed as an actuation handle. The lever carries a pressure roller located between the pivot'and the free end so that it will press upon the centre of the resilient deformable wall on movement of the lever towards the housing.

DESCRIPTION OF THE DRAWINGS FIG. 1 is a sectional view of a first embodiment of detector in accordance with the invention; and

FIG. 2 is a sectional view of a second, modified, embodiment of detector in accordance with the invention.

DESCRIPTION OF PREFERRED EMBODIMENTS The detector device shown in FIG. 2 comprises a 2 generally cylindrical housing 1 having encircling finger supports or grips 2 on its exterior.

Disposed within housing 1 is an inner body 3 having a hollow space 3a therein, in which a microphone capsule 4 is accommodated. A lead 5 connecting the microphone capsule 4 to apparatus outside of the housing 1 passes through the wall of inner body 3 and the wall of housing 1. The openings provided in the walls for this purpose are sealed in air-tight manner. A sensing pad 6 is mounted on the microphone capsule 4. The pad 6 picks up body noises and transfers the sound vibrations to the microphone capsule 4.

Alternatively to the electrical lead 5, the hollow space 3a enclosing the microphone capsule 4 can be connected to a hearing tube if the detector is to be used as a stethoscope.

The housing 1 also encloses, above the central body 3, an underpressure chamber 11. The chamber 11 is sealed in air-tight manner at the top by a resilient elastic rubber membrane 7. Below the membrane 7 is disposed a spring 8 which carries a pressure plate 9, which is in contact with the under-surface of the membrane 7. The pressure plate 9 has a rim 9a which extends there around to provide a step which abuts a circular stop la provided on the surrounding wall of the chamber 11 to limit the upward movement of the pressure plate 9.

The walls of the housing 1 and body 3 extend downwardly to form an annular ring 10 and are shaped to provide an annular channel 10a which is in communication with the chamber 11. The communication may be effected by an annular gap between the housing 1 and body 3, the spacing therebetween being maintained by spacing elements, or by way of bores or passages, or other air channels.

In the embodiment shown in FIG. 2, corresponding parts have the samereference numerals as in FIG. 1. The embodiment of FIG. 2 differs from that of FIG. 1 in that a lever 12 is pivotally mounted at one end on the housing 1 and is formed to provide a handle 13 at its other, free, end.

The lever 12 carries a pressure roller 14 which is positioned so as to engage the centre of the deformable wall 7 when the lever is depressed.

The device is used as follows:

The user holds the detector between his fingers so that the fingers lie between the finger supports or grips 2. In the case'of the FIG. 1 embodiment, he presses the membrane 7 into the housing using his thumb. The spring 8 is compressed in this way, and the volume of the chamber 11 is reduced, driving out some of the air. The detector is then placed on the patients body and held against it and the thumb pressure on the membrane is relieved. The membrane is returned to its relaxed position by the spring 8 and pressure plate 9 and returns the chamber 11 to its former volume. As, however, no air can enter the chamber when the housing is pressed onto the patients body, an underpressure arises in the chamber and this causes the skin underlying the detector to be pulled tight by being drawn into the channel 10. In the FIG. 2 embodiment, instead of pressing directly on the membrane 7, the lever 12 is depressed so that pressure roller 14 presses in the membrane 7. This achieves the same effect as already described.

A body noise detector according to the invention has the advantage that no special suction device needs to be provided outside the housing, which would alter the balance of the detector. The entire detector is a selfcontained unit without attached suction hoses or other accessories. A further advantage of the device of the invention lies in the fact that, even in a series of measurements, the underpressure acting in the channel is always the same so that the results are comparable, and not invalidated by different transmission intensities caused by different skin tensions.

If, for example, an underpressure of 100 mm/Kg is to be achieved consistently at each examination at normal atmospheric pressure, the volume of the chamber 11 has to be reduced by 13.16 percent on condition that the membrane 7 returns to its initial position. If the membrane has a diameter of 4 cm. then the spring must exert a pressure of 1,654 g. so that an underpressure of lOO mm/Kg is achieved under normal atmospheric pressure.

I claim:

1. A body noise detector comprising a housing enclosing an underpressure chamber, said housing including a rigid wall portion and a deformable wall portion, an annular ring projecting from the housing and forming a contact surface engageable with a patients body, said annular ring having a passage therethrough communicating between the contact surface and the underpressure chamber, said annular ring defining a cavity, microphone means carried by said housing and disposed in said cavity for engagement with a patients body, means for transmitting the noise detected by the microphone means, a pressure plate within said underpressure chamber and engageable with said deformable wall and spring means connected between said rigid housing wall and said pressure plate for urging said deformable wall into substantially undeformed condition by said pressure plate.

2. The detector defined in claim I, and stop means interposed between the deformable wall and the pressure plate for limiting movement of the pressure plate.

3. The detector defined in claim 2, in which the pressure plate includes a stepped rim engageable with the stop means.

4. The detector defined in claim 1, lever means pivotally connected to the housing and having a free end spaced from its pivotal connection, said lever means overlying said deformable wall portion, and a pressure roller carried by said lever and engageable with the central portion of the deformable wall by movement of said lever means free end toward the housing.

Patent Citations
Cited PatentFiling datePublication dateApplicantTitle
US1585104 *Oct 13, 1923May 18, 1926Montgomery William EMedical applicator
US1805471 *Aug 15, 1929May 19, 1931England Lee REar suction cup
US2580628 *Jul 12, 1950Jan 1, 1952Bowen & Company IncSuction electrode
Referenced by
Citing PatentFiling datePublication dateApplicantTitle
US4240444 *Jul 31, 1978Dec 23, 1980Snyder Peter EApparatus for sensing coughs
US4458693 *Mar 13, 1981Jul 10, 1984Medtronic, Inc.Monitoring system
US4784154 *Nov 13, 1986Nov 15, 1988Colin Electronics Co., Ltd.Interference resistant biomedical transducer
US4823808 *Jul 6, 1987Apr 25, 1989Clegg Charles TMethod for control of obesity, overweight and eating disorders
US5022402 *Dec 4, 1989Jun 11, 1991Schieberl Daniel LBladder device for monitoring pulse and respiration rate
US6415033Mar 24, 2000Jul 2, 2002Ilife Systems, Inc.Physiological condition monitors utilizing very low frequency acoustic signals
US6416483Mar 24, 2000Jul 9, 2002Ilife Systems, Inc.Sensor and method for detecting very low frequency acoustic signals
US6575916Mar 24, 2000Jun 10, 2003Ilife Solutions, Inc.Apparatus and method for detecting very low frequency acoustic signals
US6706002 *Mar 24, 2000Mar 16, 2004Ilife Systems, Inc.System and method for remotely monitoring at least one physiological characteristic of a child
US6878117Sep 25, 2000Apr 12, 2005Zargis Medical Corp.Handheld sensor for acoustic data acquisition
US6947565Jul 1, 2002Sep 20, 2005Ilife Solutions, Inc.Physiological condition monitors utilizing very low frequency acoustic signals
US20120259206 *Apr 8, 2011Oct 11, 2012Salient Surgical Technologies, Inc.Catheter Systems and Methods of Use
DE3639263A1 *Nov 17, 1986Jun 25, 1987Yakichi HigoVorrichtung zur ueberpruefung der funktionsfaehigkeit von in lebende koerper eingesetzte endoprothesen
WO2001022884A1 *Sep 28, 2000Apr 5, 2001Siemens Corp Res IncHandheld sensor for acoustic data acquisition
Classifications
U.S. Classification600/528, 600/586
International ClassificationA61B5/0408, A61B7/00, A61B7/04
Cooperative ClassificationA61B7/04, A61B5/04082
European ClassificationA61B7/04, A61B5/0408B