Electronic stethoscope and the stethoscope auscultation method using the same

• US 8,144,887 B2
• Filed: 06/27/2008
• Issued: 03/27/2012
• Est. Priority Date: 03/12/2008
• Status: Active Grant

• Current Assignee: Industrial Technology Research Institute
• Original Assignee: Industrial Technology Research Institute
• Inventors: Tseng, Kuo-Hua, Chou, Yu-Kon, Chiou, Yii-Tay
• Primary Examiner(s): Chin, Vivian
• Assistant Examiner(s): Zhang, Leshui
• Application Number:
  US12/147,751
• Publication Number:
  US 20090232322A1
• Time in Patent Office: 1,369 Days
• Field of Search: 381/67, 381/71.6, 381/71.7, 381/71.13, 381/72, 381/309, 381/81, 381/74, 381/332, 381/107, 381/370, 381/376, 381/381, 434/266, 434/262, 434/267, 434/270, 434/307, 434/318, 434/365, 434/396, 327/141, 327/297, 335/206, 335/341, 335/20, 600/559
• US Class Current: 381/67
• CPC Class Codes: A61B 7/04 Electric stethoscopes microphones, acoustic transducers therefor H04R

Abstract

The present invention relates to a stethoscope auscultation method, adapted for an improved stethoscope so as to be used for assisting a medical diagnosis according to visceral sounds. The stethoscope auscultation method comprises the steps of: providing a stethoscope, whereas the stethoscope is composed of a stethoscope head module, a processing unit and a signal output unit, and the stethoscope head module further comprises a sensor and a visceral sound receiver; enabling the sensor to issue an activation signal to the processing unit as soon as it detects that the stethoscope head module enters an auscultation mode, and thereby activating the stethoscope; using the stethoscope to perform an auscultation process upon a living body as the visceral sound receiver is enabled to obtain audio signals originated from the visceral organs of the living body; enabling the processing unit to shut off the stethoscope automatically when the visceral sound receiver is unable to obtain the audio signals originated from the visceral organs for environmental purposes, such as reducing power consumption of the stethoscope, prolonging lifespan of the battery used in the stethoscope.

Claims

1. A stethoscope auscultation method, adapted for assisting a medical diagnosis according to visceral sounds, comprising the steps of:

providing a stethoscope, whereas the stethoscope is comprised of;

a stethoscope head module comprising;

at least a first sensor, for detecting whether or not the stethoscope is ready for entering an auscultation mode, and a visceral sound receiver, for receiving audio signals of visceral organs originating from visceral organs of a living body;

at least two supporting parts, for positioning the stethoscope in multiple poses, each supporting part comprising;

an earpiece positioned to the top thereof, fitted with at least a second sensor embedded in the earpiece for sensing pressure variations of the earpiece;

a joint of the at least two supporting parts, for joining the two supporting parts together, comprising at least a third sensor for detecting the multiple poses of the stethoscope;

a preamplifier matching circuit, electrically connected to the stethoscope head module, for amplifying the received audio signals of the visceral organs;

a processing unit electrically connected to the preamplifier matching circuit for processing the received audio signals of the visceral organs and controlling overall operation of the stethoscope, comprising;

an audio signal processor, electrically connected to the visceral sound receiver, for processing the received audio signals of the visceral organs and issuing a shut-off signal as soon as the visceral sound receiver receives no visceral sound; and

a micro control unit, electrically connected to the sensors, the preamplifier matching circuit, and the audio signal processor, being designed to receive the activation signal and the shut-off signal so as to perform one action selected from the group consisting;

turning on the stethoscope according to the activation signal and shutting off the stethoscope according to the shut-off signal;

an attribute visceral sound processor, electrically connected to the processing unit, for receiving and amplifying a characteristic band of the visceral organs contained in the received audio signals;

an audio power amplifier, electrically connected to the attribute visceral sound processor, for amplifying the audio signals of the visceral organs after they are processed by the attribute visceral sound processor; and

a signal output unit, electrically connected to the audio power amplifier for outputting the audio signals received from the audio power amplifier;

enabling the first sensor to issue a first activation signal to the processing unit as soon as it detects that the stethoscope head module enters the auscultation mode, and enabling the audio signal processor to issue a shut-off signal as soon as the visceral sound receiver receives no visceral sound;

enabling the second sensor to issue a second activation signal to the processing unit upon evaluation of the sensed pressure variation to determine whether the stethoscope is ready for entering the auscultation mode;

enabling the third sensor to issue a third activation signal to the processing unit upon detection of a pose of the stethoscope indicating the stethoscope is ready for entering an auscultation mode;

activating the stethoscope as soon as the first activation signal is received by the processing unit;

using the stethoscope to perform an auscultation process upon the living body as the visceral sound receiver is enabled to receive the audio signals originated from the visceral organs of the living body;

amplifying and processing the received audio signals of the visceral organs received from the visceral sound receiver, and performing further signal processing by amplifying a characteristic band of the visceral organs contained in the received audio signals;

determining whether the visceral sound receiver is receiving the visceral sounds in a continuous manner, and if not, issuing the shut-off signal; and

enabling the micro control unit of the processing unit to shut off the stethoscope automatically when the visceral sound receiver is unable to receive the audio signals originated from the visceral organs, when the comparison of the pressure variation of the second sensor indicates the stethoscope is not ready for entering the auscultation mode, or when the pose of the stethoscope sensed by the third sensor indicates the stethoscope is not ready for entering the auscultation mode.

2. The stethoscope auscultation method of claim 1, wherein at least one of the first sensor, the second sensor, and the third sensor is a device selected from the group consisting:

a vibration sensor, an accelerometer, an angular velocity sensor, an angle sensor, a pressure sensor, an optical sensor, and the combinations thereof.

3. The stethoscope auscultation method of claim 2, wherein when the vibration sensor is selected to be at least one of the first sensor, the second sensor, and the third sensor, the vibration of the stethoscope head module is measured and compared with a threshold value so as to determine whether the stethoscope head module is in the auscultation mode basing on the comparison.

4. The stethoscope auscultation method of claim 2, wherein when the accelerometer is selected to be at least one of the first sensor, the second sensor, and the third sensor, the acceleration variation of the stethoscope head module is measured and compared with a threshold value so as to determine whether the stethoscope head module is in the auscultation mode basing on the comparison.

5. The stethoscope auscultation method of claim 2, wherein when the angular velocity is selected to be at least one of the first sensor, the second sensor, and the third sensor, the inclination variation of the stethoscope head module is measured and compared with a threshold value so as to determine whether the stethoscope head module is in the auscultation mode basing on the comparison.

6. The stethoscope auscultation method of claim 2, wherein when the angle sensor is selected to be at least one of the first sensor, the second sensor, and the third sensor, an inclination angle of the stethoscope head module with reference to a reference position is measured and compared with a threshold value so as to determine whether the stethoscope head module is in the auscultation mode basing on the comparison.

7. The stethoscope auscultation method of claim 2, wherein when the pressure sensor is selected to be at least one of the first sensor, the second sensor, and the third sensor, the pressure variation of the stethoscope head module is measured and compared with a threshold value so as to determine whether the stethoscope head module is in the auscultation mode basing on the comparison.

8. The stethoscope auscultation method of claim 2, wherein when the optical sensor is selected to be at least one of the first sensor, the second sensor, and the third sensor, the optical sensor comprises a light emitter, a light receiver, a light grating and a roller, being configured in a manner that a beam emitted from the light emitter is received by the light receiver as the light receiver is arranged at a position corresponding to that of the light emitter, and the light grating is connected with the roller while placing the two a position between the light emitter and the light receiver for enabling the light grating to allow/block light emanating from the light emitter to pass therethrough, the continuity of light is measured by the optical sensor so as to determine whether the stethoscope head module is in the auscultation mode basing on the continuity measurement.

9. A stethoscope, adapted for receiving audio signals originated from visceral organs of a living body, comprising:

a stethoscope head module, configured with a sensor and a visceral sound receiver in a manner that the sensor is designed to issue an activation signal as soon as it detects that the stethoscope head module enters an auscultation mode, and the visceral sound receiver is used for receiving the audio signals originated from the visceral organs of the living body;

at least two supporting parts, for positioning the stethoscope in multiple poses, each supporting part comprising;

an earpiece positioned to the top thereof, fitted with at least a second sensor embedded in the earpiece for sensing pressure variations of the earpiece and issuing a second activation signal to the processing unit upon evaluation of the sensed pressure variation to determine whether the stethoscope is ready for entering the auscultation mode;

a joint of the at least two supporting parts, for joining the two supporting parts together, comprising at least a third sensor for detecting the multiple poses of the stethoscope and issuing a third activation signal to the processing unit upon detection of a pose of the stethoscope indicating the stethoscope is ready for entering the auscultation mode;

a preamplifier matching circuit, electrically connected to the stethoscope head module, for amplifying the received audio signals of the visceral organs;

a processing unit, electrically connected to the preamplifier matching circuit, for processing the received audio signals of the visceral organs, comprising;

an audio signal processor, electrically connected to the visceral sound receiver, for processing the received audio signals of the visceral organs and issuing a shut-off signal as soon as the visceral sound receiver receives no visceral sound; and

a micro control unit, electrically connected to the sensors, the preamplifier matching circuit, and the audio signal processor, being designed to receive the activation signals and the shut-off signal so as to perform one action selected from the group consisting;

turning on the stethoscope according to the activation signal and shutting off the stethoscope according to the shut-off signal;

an attribute visceral sound processor, electrically connected to the processing unit, for receiving and amplifying a characteristic band of the visceral organs contained in the received audio signals;

an audio power amplifier, electrically connected to the attribute visceral sound processor, for amplifying the audio signals of the visceral organs after they are processed by the attribute visceral sound processor; and

a signal output unit, electrically connected to the audio power amplifier, for outputting the audio signals received from the audio power amplifier.

10. The stethoscope of claim 9, wherein the audio signal processor is a digital signal processing (DSP) audio signal processor.

11. The stethoscope of claim 9, wherein at least one of the first sensor, the second sensor, and the third sensor is a device selected from the group consisting:

a vibration sensor, an accelerometer, an angular velocity sensor, an angle sensor, a pressure sensor, an optical sensor, and the combinations thereof.

12. A stethoscope, adapted for receiving audio signals originated from visceral organs of a living body, comprising:

a stethoscope head module, configured with an ear hook, at least a first sensor and a visceral sound receiver in a manner that the first sensor is designed to issue an activation signal as soon as it detects that the stethoscope head module enters an auscultation mode and the visceral sound receiver is used for receiving the audio signals originated from the visceral organs of the living body;

a processing unit, electrically connected to the stethoscope head module to be used for processing the received audio signals of the visceral organs, further comprising;

an audio signal processor, electrically connected to the visceral sound receiver, for processing the received audio signals of the visceral organs and issuing a shut-off signal as soon as the visceral sound receiver receives no visceral sound; and

a micro control unit, electrically connected to the sensor and the audio signal processor, being designed to receive the activation signal and the shut-off signal so as to perform one action selected from the group consisting;

turning on the stethoscope according to the activation signal and shutting off the stethoscope according to the shut-off signal; and

a signal output unit, electrically connected to the processing unit and used for outputting the audio signals;

wherein the ear hook further comprises;

two supporting parts, joined with each other by an end in a manner that the supporting parts can be positioned as a first pose by pulling the two apart from each other, or can be positioned as a second pose by drawing the two close to each other, both centering around the joint of the two;

an earpiece positioned to the top thereof, fitted with at least a second sensor embedded in the earpiece for sensing pressure variations of the earpiece and issuing a second activation signal to the processing unit upon evaluation of the sensed pressure variation to determine whether the stethoscope is ready for entering the auscultation mode; and

at least a third sensor, disposed at the joint of the two-supporting parts in a manner that the at least one sensor is turned on/off according to whether the two supporting parts is positioned as the first/second poses and issuing a third activation signal to the processing unit upon detection of a pose of the stethoscope indicating the stethoscope is ready for entering the auscultation mode.

13. The stethoscope of claim 12, wherein the audio signal processor is a digital signal processing (DSP) audio signal processor.

14. The stethoscope of claim 12, wherein the signal output unit is substantially an earpiece.

15. The stethoscope of claim 12, wherein the stethoscope further comprises:

a preamplifier matching circuit, electrically connected to the processing unit and the stethoscope head module for amplifying the received audio signals of the visceral organs.

16. The stethoscope of claim 12, wherein the stethoscope further comprises:

an attribute visceral sound processor, electrically connected to the audio signal processor and the signal output unit, for amplifying a characteristic band contained in the received audio signals of the visceral organs.

17. The stethoscope of claim 12, wherein the stethoscope further comprises:

an audio power amplifier, electrically connected to the processing unit and the signal output unit for amplifying the audio signals of the visceral organs after they are processed by the processing unit while feeding the amplified audio signal to the signal output unit to be outputted therefrom.

18. The stethoscope of claim 12, wherein at least one of the first sensor, the second sensor, and the third sensor is a device selected from the group consisting:

a vibration sensor, an accelerometer, an angular velocity sensor, an angle sensor, a pressure sensor, an optical sensor, and the combinations thereof.

19. The stethoscope of claim 12, wherein the third sensor is turned on when the two supporting parts are positioned as the first pose;

and the third sensor is turned off when the supporting parts are positioned as the second pose.

20. The stethoscope of claim 12, wherein the third sensor is a device selected from the group consisting:

a contact switch, a pressure sensor, a stress sensor, and the combinations thereof.

21. The stethoscope of claim 12, wherein the second sensor is a pressure sensor for detecting pressure variation of the earpiece;

and the detected pressure variation is then compared with a threshold value so as to determine whether the stethoscope head module is in the auscultation mode basing on the comparison.