JP2014050614A - Biological sound measuring system - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a biological sound measuring system capable of recognizing where in a subject's body problems exist even when biological sounds of various places of the subject's body are decreased.SOLUTION: A biological sound measuring system includes: a plurality of sound collecting means 11A to 11D for collecting biological sounds of a subject's body and outputting the collected biological sounds as an electric signal; comparing means 17 for comparing the electric signal outputted by the plurality of sound collecting means and outputting comparison results; and display means 21 for displaying the comparison results.

Description

  The present invention relates to a biological sound measurement system that measures a biological sound to grasp a consciousness state of a subject.

Medical operations such as surgery under general anesthesia and endoscopic treatment are generally performed while grasping the state of consciousness and blood flow of the subject.
For example, there is an oxygen saturation monitor as a medical device for grasping the state of consciousness during surgery or endoscopic treatment. The oxygen saturation monitor is attached to the fingertip of a subject and measures the oxygen saturation of blood flowing through the fingertip. However, since it takes a certain amount of time for oxygen to be taken into the body from the nose and mouth by the subject, the state of the subject cannot be measured in real time. Therefore, even if the subject's breathing is in a dangerous state, the surgeon may not be able to immediately grasp the fact.
Furthermore, it is difficult to set universal numerical values and judgment criteria for judging the presence or absence of abnormalities, which is not practical.
As another example of this type of medical device, a respiratory measurement device that measures the respiratory state of a subject while performing endotracheal intubation is known. Although this breathing measurement device can measure the breathing state of the subject in real time, it is difficult to accurately grasp whether the ventilation has spread throughout the lung field, so it accurately grasps the breathing state of the subject. Is difficult. Furthermore, there is a problem that the respiration measuring device is generally large and expensive.

On the other hand, Patent Document 1 discloses a biological sound measurement system that is a medical device that overcomes the problems of the above-described apparatus using an oxygen saturation monitor and an endotracheal intubation.
This biological sound measurement system is configured to continuously collect biological sounds by contacting the subject's skin and output the collected biological sounds as an electrical signal, and the normal living body of the subject. Normal value data based on sound, and abnormal value data based on biological sound at the time of abnormality of the subject are stored in advance, and can receive an electrical signal output from the microphone, and a processing device including an alarm device; It is equipped with.
In this biological sound measuring system, the biological sound data (electrical signal) of the subject is sent from the microphone to the processing device in real time. Then, the body sound data (electrical signal) received by the processing device is compared with normal value data and abnormal value data, and if the subject's consciousness state (body sound) is determined to be in a dangerous state, the alarm device issues an alarm. To emit. Moreover, there is an advantage that it can be manufactured in a small size and at a low cost as compared with the respiratory measurement device.

JP 2008-1113936 A

However, the biological sound measurement system of Patent Document 1 has the following drawbacks.
For example, when measuring the living body sound (breathing sound) of one lung with a microphone, if the alarm device gives an alarm, the operator can recognize that an abnormality has occurred in the lung breathing sound. However, it is not possible to identify whether the abnormal breathing sound is caused by an abnormality in the lungs or an abnormality in another part (for example, a wrinkle in the throat). The surgeon may not be able to take appropriate measures.

  The present invention does not measure the change in the monitor value in one place, but by comparing two or more body sounds in the body, even if the body sound is lowered, it can be located anywhere in the body. An object of the present invention is to provide a biological sound measurement system that can recognize whether there is a problem.

  The biological sound measurement system of the present invention includes a plurality of sound collecting means for collecting a biological sound of a subject and outputting the collected biological sound as an electric signal, and an electric signal pattern output by each of the sound collecting means. In comparison, it comprises comparison means for outputting a comparison result relating to a difference or change rate from the initial state of the electrical signal pattern before operation, and display means for displaying the comparison result.

  When the comparison means determines that the electrical signal pattern output from any one of the sound collection means is shifted by a predetermined amount or more relative to the electrical signal pattern output from any other sound collection means. The abnormal sound detection result may be output as the comparison result.

  The electrical signal used in the comparison means may be a signal that has passed through a high-pass filter or a low-pass filter, a signal that has been subjected to digital analysis, or the like.

  A storage means for storing a reference pattern, and the comparison means detects abnormal sound as the comparison result when the comparison means determines that the electrical signal pattern output from any of the sound collection means is out of the reference pattern; The result may be output.

In the above comparison means, the combination of points to be compared may be freely set, and the determination criteria may be changed by multiplying each with a coefficient.
The data to be registered in the storage means may be past data after the start of measurement, or a certain point may be set as a reference and a deviation from the reference may be observed.

  You may provide the alarm transmission means which issues an alarm, when the said comparison means outputs the said abnormal sound detection result.

  You may provide the vest which can be mounted | worn with the said patient's chest in the state covered with the said sound collection means made to contact with the subject.

  The vest may include a mesh cloth portion extending from the sound collecting means, connected to the comparison means, and provided with a number of holes through which a signal transmission portion for transmitting the electric signal pattern to the comparison means can pass. Good.

  It can be wrapped around the body of the subject, has a fixing means that can be fixed to another part of itself, and includes a fixing band integrated with the sound collecting means. Good.

  There may be provided a pair of opening and closing pieces that can be opened and closed with each other so as to sandwich a part of the body of the subject and are integrated with the sound collecting means.

  The clamping means may include opening degree adjusting means capable of adjusting the opening degree of the pair of opening / closing pieces in a stepwise manner and fixing the pair of opening / closing pieces at an arbitrary opening degree.

  When collecting the body sound of the subject, it is not necessary to bring the sound collecting means into contact with the subject as long as the directivity of the sound collection is improved.

According to the present invention, the plurality of sound collecting means attached to the body (a plurality of locations) of the subject collects the body sound of each attachment portion of the subject and uses the collected body sound as an electrical signal. Output to the comparison means. Then, the comparison means compares the two or more electrical signal patterns output by each sound collection means, outputs the comparison result from the initial state with respect to the difference and change rate, and the display means displays the comparison result.
For example, when sound collecting means is attached to the left and right lungs, neck, and median sternum, which are related to respiratory function, the difference and rate of change in signal pattern from the cervix and median sternum are compared with the initial state. If the decrease in the signal pattern of the cervix is significant (or the start of the decrease starts earlier) compared to the median sternum, the operator can recognize that there is some factor in the cervix (for example, heels are involved). In addition, when confirming the respiratory state with the movement of the rib cage, the movement of the rib cage may increase if the breathing is not performed properly due to airway compression or tongue root depression. By comparing the difference and rate of change of the signal pattern of the living body sound of the lungs from the initial state, it is possible to quickly and easily confirm in which part the abnormality of the respiratory state has occurred.
Furthermore, by comparing the signal patterns from the left and right lungs, even if the function of either lung is reduced, it can be confirmed early.

It is a figure showing the whole structure of one Embodiment of this invention. It is a figure showing the chest side of the upper half of the subject of a 1st modification. It is a figure showing the back part side of a subject's upper body. It is a perspective view of a sound collection means. It is a center vertical side view of a sound collection means. It is a vertical side view when a sound collection means is attached to the vest. It is a figure showing the whole structure of the 2nd modification. It is a figure showing the left hand of a subject. It is sectional drawing which follows the IX-IX arrow line of FIG. It is a figure similar to FIG. 8 of the 3rd modification. It is sectional drawing which follows the XI-XI arrow line of FIG. It is a figure similar to FIG. 8 of the 4th modification. It is sectional drawing which follows the XIII-XIII arrow line of FIG. It is sectional drawing which follows the XIV-XIV arrow line of FIG.

Hereinafter, an embodiment of the present invention will be described with reference to FIG.
The biological sound measurement system 10 of this embodiment includes four microphones 11A, 11B, 11C, and 11D and a biological sound measurement device 15.
The microphones (sound collecting means) 11A, 11B, 11C, and 11D have a sound collecting surface that can be brought into close contact with the skin of the subject 100, and an electric signal ( (Analog signal) and output. One end of the cable 14 is connected to output portions (portions for outputting electrical signals) of the microphones 11A, 11B, 11C, and 11D, and the other end of the cable 14 is connected to the biological sound measuring device 15.
The biological sound measuring device 15 includes a case 16, a control unit (comparing unit) 17, a signal processing unit 18, a storage unit 19, an alarm transmission unit 20, a display unit 21, and a sensitivity adjustment unit 22. The control means 17, the signal processing part 18, the memory | storage means 19, the alarm transmission means 20, the display means 21, and the sensitivity adjustment part 22 are provided.
As shown in the figure, the signal processing unit 18, the storage unit 19, the alarm transmission unit 20, the display unit 21, and the sensitivity adjustment unit 22 are electrically connected to the control unit 17. The signal processing unit 18 is connected to the other end of the cable 14, receives the electrical signals (analog signals) sent from the microphones 11A, 11B, 11C, and 11D via the cable 14, and amplifies the electrical signals. However, it is converted into a digital signal and output to the control means 17. The storage means 19 stores in advance normal pattern data, which are patterns of various body sounds such as breathing sound and blood flow sound when the subject 100 is normal. The alarm transmission means 20 issues an alarm when the control means 17 determines that the breathing sound of the subject 100 is abnormal as will be described later. The display means 21 is exposed on the surface of the case 16 and is a graph of the output results of the signal processing unit 18 (digitized output results of the microphones 11A, 11B, 11C, and 11D) (the horizontal axis is time). , The vertical axis represents voltage), and the comparison result (described later) output by the control means 17 is displayed. The sensitivity adjusting unit 22 is a rotary knob provided in a state exposed on the surface of the case 16 and adjusts the amplification level by the signal processing unit 18.

Next, the usage procedure of the biological sound measurement system 10 and the operation of the biological sound measurement device 15 will be described.
The subject 100 is lying on his / her back on a bed, not shown, in a shirtless state. In this state, endoscopic treatment such as laparoscopic cholecystectomy under general anesthesia or endoscopic gastric submucosal dissection is performed by inserting an endoscope through the mouth of the subject 100.
The four microphones 11A, 11B, 11C, and 11D are respectively attached to four parts that share the respiratory function or are associated with the respiratory function. That is, the microphone 11A is attached to the neck of the subject 100, the two microphones 11B and 11C are attached to the parts facing the left and right lungs, and the microphone 11D is attached to the part facing the median sternum. Each of the microphones 11A, 11B, 11C, and 11D is fixed to the subject 100 using an adhesive tape, a gel agent, or the like (all not shown), and the sound collection surfaces of the microphones 11A, 11B, 11C, and 11D are It is in close contact with the skin. Each of the microphones 11A, 11B, 11C, and 11D continuously collects the respiratory sound of each part through the sound collection surface, and outputs an electrical signal (analog signal) according to the level of the collected respiratory sound.
The electrical signals output from the microphones 11A, 11B, 11C, and 11D are sent to the signal processing unit 18 through the cable 14, are digitized while being amplified by the signal processing unit 18, and are further sent to the control unit 17.
Note that an AD conversion circuit may be provided in the microphones 11A, 11B, 11C, and 11D to directly output a digital signal. As these electric signals, a signal that has passed through a high-pass filter or a low-pass filter, a signal that has been subjected to digital analysis, or the like may be used.

The control means 17 pre-stores digital signals relating to sound volume, sound quality, frequency, etc. based on the sound collection data captured by the microphones 11A, 11B, 11C, and 11D before the operation in the storage means 19 as an initial state, and two more locations. Compare the signal patterns of the above (for example, the microphone 11A and the microphone 11D), and the initial state of the difference or change rate between the two signal patterns (reference pattern. Also, a reference pattern in any state during operation is used. May be stored in advance. Further, a signal pattern when the subject 100 is in a normal state or an arbitrary state during an operation is stored in advance as a default. Further, specific information corresponding to the region, for example, the fact that the neck has a narrower airway than the lung and the frequency becomes higher may be stored in advance. Next, of the collected sound data captured by each of the microphones 11A, 11B, 11C, and 11D, the sound quality, volume change, and sound change method (for example, continuity and intermittentness) with respect to the sound collection data at two or more locations. And sounds other than the initial set values (for example, sounds in an arbitrary state during the operation) are compared. For example, if the tongue base sinks and the airway is compressed due to a decrease in the consciousness of the subject 100 over time, a snoring sound such as a zoom-in occurs in the cervix, or a wrinkle is entangled In this case, a sound with a frequency such as a hugh is generated. In such a case, since the relative balance of the difference and change rate of the signal pattern between the microphone 11A and the microphone 11D is deviated from the initial state, the control unit 17 compares the difference between the display unit 21 and the initial state. Is displayed with a sound, a graph, a number, or the like, and when a preset coefficient is exceeded, a signal is sent to the alarm transmission means 20 and an alarm such as a sound or light is emitted from the alarm transmission means 20. Therefore, the surgeon can recognize that the cervical breathing sound is significantly lower than the breathing sounds near the left and right lungs and the median sternum by looking at the display means 21. Further, since an alarm is issued, the surgeon can grasp the change in the respiratory state without looking at the display means 21 (while increasing the pitch according to the difference from the initial state (the higher the difference, the higher the pitch becomes). You may be alerted to get higher). In this way, the surgeon can easily grasp the occurrence of any abnormality in the neck (for example, the tongue base sinks and the airway is narrow) and the site of occurrence, so surgery and endoscope can be performed as necessary. You will be able to make decisions to stop treatment.
Furthermore, the surgeon can determine the urgency level (risk level) according to the location where the signal level has decreased and the degree of the decrease in the signal level. That is, in this embodiment, even if the signal level of the microphone 11A (neck) decreases, if the difference is small, the degree of urgency is not so high, but the digital signal level of the microphones 11B and 11C (lung) decreases. Moreover, since the urgency is high when the difference from other parts is large, in this case, the operation or endoscopic treatment is immediately interrupted.
On the other hand, in the present embodiment, each microphone 11A, 11B, 11C, 11D is attached to the respiratory system path from the neck to the lungs, so that the difference and rate of change of each digital signal during the operation is almost the same as the initial state. By reading from the display means 21 that they match (and the alarm sending means 20 does not issue an alarm), the operator can recognize that ventilation is sufficiently distributed in the lung field of the subject 100. .

  Note that the lower lung is compressed from the upper lung and the respiratory sound is abnormal due to the subject 100 taking a lateral position on the bed for an endoscopic treatment or the like, for example. In some cases, this state can be easily determined by comparing signals based on the microphones 11B and 11C. In general, the body sounds of two organs that exist symmetrically are very similar. Therefore, if the signals based on the microphones 11B and 11C are compared with each other, abnormal respiratory sounds in the left and right lungs even during surgery. Occurrence can be recognized more accurately.

In addition, when the level of consciousness of the subject 100 is greatly reduced and the signals based on the sound collection data of all the microphones 11A, 11B, 11C, and 11D are significantly reduced in the same magnitude, there is a difference between the signals. It becomes difficult to occur.
However, in this case, the control means 17 compares the signal patterns (waveforms) of the microphones 11A, 11B, 11C, and 11D with the patterns that have been initially set at the respective locations, and the microphones 11A, 11B, 11C, and 11D. When it is determined that a signal whose relationship is the same as or close to that of the initially set pattern is deviated by a certain amount or the degree of deviation is larger, the control means 17 displays the comparison result (abnormal sound detection result). Since the information is displayed on the means 21 and the signal is sent to the alarm transmission means 20, the alarm transmission means 20 issues an alarm.

2 to 6 show a first modification.
The microphones (sound collecting means) 25A, 25B, 25C, and 25D have a sound collecting surface on one side, and a signal transmission unit 26 having a connector portion 27 at the tip projects from the surface opposite to the sound collecting surface. It is set up. On the side opposite to the sound collection surface of the microphones 25A, 25B, 25C, 25D, there is an umbrella-shaped cover material 29 having an umbrella shape in which the peripheral edge protrudes toward the microphones 25A, 25B, 25C, 25D as compared with the central portion. The signal transmission part 26 has penetrated the through-hole formed in the center part of the cover material 29 which is located. Further, on the opposite side to the microphones 25A, 25B, 25C, and 25D with the cover material 29 interposed therebetween, a metal fixing bracket 30 is located. The fixing bracket 30 includes a pair of deformation pieces 31, and the signal transmission unit 26 passes through a through hole formed in the central portion of the fixing bracket 30. Then, with the center portion of the cover material 29 held between the microphones 25A, 25B, 25C, and 25D and the center portion of the fixing bracket 30, the through hole of the fixing bracket 30 and the signal transmission portion 26 are fixed to each other by bonding or the like. ing.
The vest 33 includes a main body portion 34 made of mesh fabric having a large number of holes through which the signal transmission portion 26 can pass, a pair of left and right neck fastening pieces 35 extending from the main body portion 34 and having raised surfaces, and shoulder fastening pieces. 36 and a chest fastening piece 37, and the main body 34, the neck fastening piece 35, the shoulder fastening piece 36, and the chest fastening piece 37 are all flexible. Yes. Furthermore, a surface fastener (fixing means) that can be attached to and detached from the other neck fastening piece 35 and the chest fastening piece 37 is provided at one end of the left and right neck fastening pieces 35 and the chest fastening piece 37. A hook and loop fastener (fixing means) that can be attached to and detached from the left and right chest fastening pieces 37 is formed at the tip of the left and right shoulder fastening pieces 36.

When using the biological sound measurement system 10 '(cable 14, biological sound measurement device 15, microphones 25A, 25B, 25C, 25D, cover material 29, fixing bracket 30, vest 33) of this modification, first, the main body of the vest 33 The signal transmission parts 26 of the microphones 25A, 25B, 25C, and 25D are inserted into the four holes of the part 34 (mesh fabric), and each deformation piece is inserted into the hole (in the body part 34) around the hole through the signal transmission part 26. The microphones 25A, 25B, 25C, and 25D are attached to the main body 34 by bending the end portions of the respective deformation pieces 31 (plastically deforming).
Then, the vest 33 is attached to the chest of the subject 100. At this time, as shown in FIG. 3, the surface fastener of one neck fastening piece 35 is attached to the other neck fastening piece 35, and the surface fastener of one chest fastening piece 37 is attached to the other chest fastening piece. It attaches to the piece 37, Furthermore, the said surface fastener of the left and right shoulder fastening pieces 36 is attached to the left and right chest fastening pieces 37, respectively, so that the vest 33 does not fall off from the chest of the subject 100. Then, the cover material 29 is elastically deformed by coming into contact with the skin of the subject 100, and the sound collecting surfaces of the microphones 25 </ b> A, 25 </ b> B, 25 </ b> C, 25 </ b> D are in close contact with the skin of the subject 100. At this time, if the sound collection surfaces of the microphones 25A, 25B, 25C, and 25D are in contact with four desired locations of the subject 100 (the neck, left and right lungs, and the median sternum), the subject 100 Lie on the bed while lying on your back. On the other hand, when the contact positions of the sound collection surfaces of the microphones 25A, 25B, 25C, and 25D are deviated from the desired positions, both the fixing brackets 30 integrated with the displaced microphones 25A, 25B, 25C, and 25D are used. The deformed piece 31 is returned to its initial shape (plastically deformed) and once extracted from the hole of the main body 34, the deformed pieces 31 are inserted again into another hole, and the end portion thereof is bent again (plastically deformed). The microphones 25A, 25B, 25C, and 25D are attached to the main body 34, and then the subject 100 is laid on the bed.
The subsequent measurement procedure is the same as that of the body sound measurement system 10.

7 to 9 show a second modification.
The biological sound measurement system 10 ″ of this modification includes microphones 11A and 11B, a cable 14, a biological sound measurement device 15, and a pair of fixing bands 40 as components.
The center part of the cover material 29 is fixed to the surface opposite to the sound collection surface of the microphones 11A and 11B.
The pair of fixing bands 40 is made of a flexible material having a raised surface, and one end thereof is a surface fastener (fixing means) that can be attached to and detached from the surface of the fixing band 40. Is formed. The surface of each cover member 29 opposite to the microphones 11A and 11B is fixedly attached to the center of each fixing band 40, and the cables 14 extending from the microphones 11A and 11B are connected to the signal processing unit 18. doing.

In this modification, a pair of fixing bands 40 are wound around the left and right wrists of the subject 100, and each fixing band 40 is fixed to each wrist using a hook-and-loop fastener. The sound collection surfaces of 11A and the microphone 11B are brought into close contact with a portion of the wrist (skin) facing the vein. Then, as shown in FIG. 7, when the subject 100 is laid on the bed 90 in the left-side position, the insertion portion 96 of the endoscope 95 is inserted into the body cavity from the mouth of the subject 100, and the endoscope Endoscopic treatment with 95.
In this modification, in order to grasp the state of consciousness of the subject 100 during the endoscopic treatment, the blood flow sound (biological sound) of the pulse on both wrists of the subject 100 using the biological sound measurement system 10 ″. Measure. Since the general characteristics of the blood flow sound are different from those of the breathing sound, the sensitivity of the microphones 11A and 11B is adjusted to the characteristics of the blood flow sound by adjusting the sensitivity adjustment unit 22 in advance.

  The microphones 11 </ b> A and 11 </ b> B continuously collect blood flow sounds from both wrists through the sound collection surface, and output an electrical signal (analog signal) according to the level of the collected sound. This electric signal is sent to the signal processing unit 18 through the cable 14, digitized while being amplified by the signal processing unit 18, and further sent to the control means 17. The control means 17 displays on the display means 21 a graph of digital signals relating to sound volume, sound quality, frequency, etc. based on the collected sound data of the microphones 11A and 11B (the horizontal axis is time and the vertical axis is voltage), and each digital signal is displayed. Compare signal waveforms (continuity, intermittent, change, etc.) with each other. When the health condition of the subject 100 is normal, the relative balance of the digital signal based on the sound collection data of the microphone 11B and the digital signal based on the sound collection data of the microphone 11A substantially matches in the initial state. When the subject 100 takes the left-side position, the blood vessel flowing on the left wrist is compressed as time passes and the blood flow flowing through the blood vessel is reduced. When the amount of deviation becomes greater than or equal to a predetermined level, the control means 17 displays the fact on the display means 21 and sends a signal to the alarm transmission means 20. Then, since the alarm transmission means 20 issues an alarm, the surgeon looks at the display means 21 to confirm that the blood flow sound of the left wrist pulse is faster and significantly lower than the blood flow sound of the right wrist pulse. Since it can be recognized, a treatment such as changing the posture of the subject 100 may be performed.

  Also in this modified example, when the consciousness level of the subject 100 is greatly reduced and the digital signals based on the collected sound data of the microphones 11A and 11B are significantly reduced in the same magnitude (the microphone 11A side and the microphone 11B). When there is no difference in the digital signal level on the side), the control means 17 compares the digital signals of the microphones 11A and 11B with the normal pattern. When it is determined that the digital signals of the microphones 11A and 11B deviate from the normal pattern by a predetermined amount or more, the control unit 17 displays the comparison result on the display unit 21 and sends a signal to the alarm transmission unit 20. Since it is sent, the alarm transmission means 20 issues an alarm.

This second modification can be implemented in the form of the third modification shown in FIGS. 10 and 11 and the fourth modification shown in FIGS.
In the third modification, the microphones 11 </ b> A and 11 </ b> B (and the cover material 29) are attached to the clamping means 45.
The clamping means 45 includes an opening / closing piece 46 and an opening / closing piece 49. One end of the opening / closing piece 46 serves as a clamping portion 47, and a stopper 48 projects from an intermediate portion of the opening / closing piece 46. One end of the opening / closing piece 49 serves as a clamping part 50, and the central part of the opening / closing piece 49 is connected to the central part of the opening / closing piece 46 via a rotary connection shaft 51 so as to be rotatable (openable / closable). Further, since both ends of the leaf spring 52 are fixed to the end of the opening / closing piece 46 opposite to the holding part 47 and the end of the opening / closing piece 49 opposite to the holding part 50, the opening / closing piece 46 and the opening / closing piece 46 49 is always urged to rotate in the closing direction by a leaf spring 52. The maximum open position of the opening / closing piece 46 and the opening / closing piece 49 is regulated by a position where the substantially central portion of the outer surface of the opening / closing piece 49 abuts against the stopper 48 of the opening / closing piece 46.
Each cover material 29 fixed to the microphone 11A and the microphone 11B is fixed to the inner surface of the holding portion 47 of the opening / closing piece 46 (the surface facing the holding portion 50).
The surgeon grasps the end of the opening / closing piece 46 opposite to the holding part 47 and the end of the opening / closing piece 49 opposite to the holding part 50 by hand so that the holding means 45 resists the urging force of the leaf spring 52 to the maximum. After opening to the open position and positioning the sandwiching portion 47 and the sandwiching portion 50 on both sides of the wrist of the subject 100, the hands are released from the opening / closing piece 46 and the opening / closing piece 49 and are held using the biasing force of the leaf spring 52 If the wrist is clamped by the unit 47 and the clamping unit 50, the sound collecting surfaces of the microphones 11A and 11B can be brought into close contact with the wrists.

In the fourth modification, the microphones 11 </ b> A and 11 </ b> B (and the cover material 29) are attached to the clamping means 55.
The basic structure of the clamping means 55 is the same as that of the clamping means 45, but the clamping means 55 does not include the leaf spring 52, but extends from the opening / closing piece 49 to the opening / closing piece 46 side (having a plurality of teeth). A projecting piece 56 made of a flexible material having ratchet teeth (opening adjustment means) 57, a through hole 58 formed in the opening / closing piece 46, and a ratchet tooth (opening adjustment means) 59 (having a plurality of teeth); It is equipped with. As shown in the figure, the protruding piece 56 passes through the through hole 58, and the ratchet teeth 57 and the ratchet teeth 59 mesh with each other. The clamping means 55 is configured to release the engagement between the ratchet teeth 57 and the ratchet teeth 59 and slide the projecting piece 56 relative to the through hole 58 and then reengage the ratchet teeth 57 and the ratchet teeth 59 to open and close the opening / closing piece. 46 and the opening / closing piece 49 can be adjusted to any opening, and the opening can be maintained.
Therefore, after the operator has positioned the holding part 47 and the holding part 50 of the holding means 55 opened to the maximum open position on both sides of the wrist of the subject 100, until the holding part 47 and the holding part 50 come into contact with the wrist. If the relative slide position of the protruding piece 56 with respect to the through hole 58 is changed, and then the ratchet teeth 57 and the ratchet teeth 59 are engaged again to fix the opening degree of the holding part 47 and the holding part 50, the microphones 11A and 11B are collected. The sound surface can be brought into close contact with each wrist.

As mentioned above, although this invention was demonstrated based on the said embodiment, this invention can be implemented, giving various changes.
For example, a device other than a microphone, such as a vibrometer, a pressure sensor, an acceleration sensor, or an optical sensor, may be used as the sound collecting means. These microphones and other sound collecting means may not be in direct contact with the subject as long as the directivity of sound collection is improved.
Further, the number of sound collecting means in the embodiment and each modified example is not limited to the above, and any number may be used as long as it is two or more. Moreover, the site | part to attach is not limited to the said site | part, For example, it can also attach to an ankle or abdomen.
Furthermore, the sound collecting means and the biological sound measuring device 15 may be connected wirelessly instead of the cable 14.
The sound collecting means itself may be provided with an amplifier circuit or an A / D conversion circuit (a circuit that converts an electrical signal from an analog signal to a digital signal).
Furthermore, the biological sound measurement system 10, 10 ′, 10 ″ may be used in combination with an oxygen saturation monitor.
Furthermore, a lamp may be provided in the case 16 so that an alarm light is emitted from the lamp based on a signal from the alarm transmission means 20 instead of (or with) an alarm sound from the alarm transmission means 20. Further, the warning light may be blinked with a certain interval, and the blinking interval may be shortened when the warning light is deviated more than a certain amount as compared with the initial state. Alternatively, the type of alarm may be changed by changing the light amount or changing the color even with continuous light.
The sound collecting means may be attached to the body of the subject using a fixing band having a structure similar to the fixing band 40 and longer than the fixing band 40.

10 10 ′ 10 ″ biological sound measurement system 11A 11B 11C 11D microphone (sound collecting means)
14 Cable 15 Body sound measuring device 16 Case 17 Control means (comparison means)
18 Signal processing unit 19 Storage unit 20 Alarm transmission unit 21 Display unit 22 Sensitivity adjustment unit 25A 25B 25C 25D Microphone (sound collecting unit)
26 Signal transmission portion 27 Connector portion 29 Cover material 30 Fixing bracket 31 Deformation piece 33 Vest 34 Main body portion 35 Neck fastening piece 36 Shoulder fastening piece 37 Chest fastening piece 40 Fixing band 45 Holding means 46 Opening / closing piece 47 Holding Portion 48 Stopper 49 Opening / closing piece 50 Holding part 51 Rotating connection shaft 52 Leaf spring 55 Holding means 56 Projecting piece 57 Ratchet teeth (opening adjusting means)
58 through hole 59 ratchet teeth (opening adjustment means)
90 Bed 95 Endoscope 96 Insertion section 100 Subject

Claims (9)

A plurality of sound collecting means for collecting the body sound of the subject and outputting the collected body sound as an electrical signal;
Comparing means for comparing the electrical signal patterns output by each of the sound collecting means and outputting a comparison result relating to a difference or change rate from the initial state of the electrical signal pattern;
Display means for displaying the comparison result;
A biological sound measurement system comprising: The biological sound measurement system according to claim 1,
When the comparison means determines that the electrical signal pattern output from any one of the sound collection means is shifted by a predetermined amount or more relative to the electrical signal pattern output from any other sound collection means. A biological sound measurement system that outputs an abnormal sound detection result as the comparison result. The biological sound measurement system according to claim 1 or 2,
Comprising storage means for storing a reference pattern;
A biological sound measurement system that outputs an abnormal sound detection result as the comparison result when the comparison means determines that the electrical signal pattern output by any one of the sound collection means deviates from the reference pattern. The biological sound measurement system according to claim 2 or 3,
A biological sound measurement system comprising alarm transmission means for issuing an alarm when the comparison means outputs the abnormal sound detection result. The biological sound measurement system according to any one of claims 1 to 4,
A biological sound measurement system comprising a vest that can be worn on the chest of the subject in a state where the sound collecting means is in contact with the subject. The biological sound measurement system according to claim 5,
The body sound including the vest including a mesh cloth portion extending from the sound collecting means, connected to the comparing means, and provided with a number of holes through which a signal transmission section for transmitting the electric signal pattern to the comparing means can be passed. Measuring system. The biological sound measurement system according to any one of claims 1 to 4,
A living body sound having a fixing means that can be wound around the body of a subject and that can be fixed to a part of the subject with respect to the other part of the subject, and includes a fixing band integrated with the sound collecting means. Measuring system. The biological sound measurement system according to any one of claims 1 to 4,
A biological sound measurement system comprising a pair of opening and closing pieces that can be opened and closed with respect to each other so as to sandwich a part of the body of a subject and that is integrated with the sound collecting means. The biological sound measurement system according to claim 8,
A biological sound measuring system, wherein the clamping means includes an opening degree adjusting means capable of adjusting the opening degree of the pair of opening / closing pieces stepwise and fixing the pair of opening / closing pieces at an arbitrary opening degree.

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