A lung acoustic feature detection device

Abstract

The utility model relates to medical equipment provides a kind of lung acoustic characteristic detection device, the lung acoustic characteristic detection device, including sound wave emission device, sound wave receiving device, the sound wave emission device is used to emit the sound wave of specific frequency and intensity, the sound wave receiving device is used to receive and analyze sound wave, one of the sound wave emission device and sound wave receiving device can be inserted into the inside of airway inside by tracheal intubation, another is located on the body surface, the lung acoustic characteristic detection is used to detect the propagation time or sound energy attenuation degree of sound wave in lung tissue.The lung acoustic characteristic detection device is also provided with magnetic field positioning system, to determine the distance and direction between sound wave emission device and sound wave receiving device, so as to calculate the sound wave propagation speed.According to the propagation speed of sound wave in lung tissue and sound attenuation degree, the progress of lung lesion is conveniently, real-time, non-invasively and repeatably evaluated.

Description

Technical Field

[0001] This utility model relates to the field of medical technology, and in particular to a device for detecting acoustic features of the lungs. Background Technology

[0002] Ultrasound technology is one of the most commonly used imaging techniques in clinical practice, with applications ranging from ultrasound examination rooms and bedside visits to ambulances and family doctor settings. The biggest advantage of ultrasound technology is its virtually non-side-effect nature, allowing for real-time, repeated, and dynamic assessment. However, due to its high frequency and poor penetrability, ultrasound cannot penetrate air-filled lung tissue, significantly limiting its application in lung imaging and limiting its use to some rough assessments based on artifact imaging.

[0003] A large number of patients with lung diseases are present in clinical practice. These patients may be hospitalized in the respiratory department or the intensive care unit. In critically ill patients, even if there were no original lung lesions, the primary disease can lead to multiple organ dysfunction, with the lungs being the most vulnerable organ. In patients with cardiovascular diseases, cardiac dysfunction can cause pulmonary edema, leading to respiratory dysfunction. Even without cardiopulmonary disease, critically ill patients undergoing endotracheal intubation and mechanical ventilation may develop pneumothorax, atelectasis, and other lung lesions. Lung lesions are characterized by rapid progression and serious consequences. Current diagnostic techniques allow for initial assessment via bedside X-rays. More precise assessment requires CT scans, which involve high doses of radiation and pose significant life-threatening risks to patients during transport. Ultrasound has been developed for use in the lungs. When lung water content increases, a "trumpet-like" amplification effect can occur, enhancing ultrasound echo energy and creating bright line artifacts. In pneumothorax, ultrasound may detect "lung spots within the coastal sign." All of the above signs are artifacts, that is, erroneous images with certain regularity, and have low diagnostic value.

[0004] Therefore, there is a need for a device that can be used to detect the acoustic features of the lungs in a convenient, non-invasive, dynamic, repeatable, and safe manner, especially for patients with lung lesions who have been intubated. Some clinical studies have already explored this direction. In his 1983 paper "Sound speed in pulmonary parenchyma," David A. Rice used audible sound waves to pass through an isolated horse lung and measured the speed of sound in lung tissue to be between 25 and 70 m / s, less than 20% of the speed of sound in air, and not as expected between 340 m / s (in air) and 1540 m / s (in human soft tissue). In 2005, Philip J. Berger et al. (in "Velocity and attenuation of sound in the isolated fetal lung as it is expanded with air") studied the speed of sound in isolated fresh sheep fetuses. They found that initially, when the fetal lung was removed, due to the extremely low air content, the speed of sound passing through the lung was 187 ± 28.2 m / s. Subsequently, as air was injected into the fetal lung, the speed of sound gradually decreased. When the lung density decreased from 0.93 g / ml to 0.75 g / ml, the speed of sound dropped to 87 m / s ± 3.7 m / s. This demonstrates that the speed of sound propagation within lung tissue varies significantly and directionally with the air and fluid content of the lung; that is, the higher the air content, the slower the speed of sound. The study also found that the attenuation of sound energy during propagation in lung tissue was positively correlated with the air content; that is, the higher the air content, the greater the attenuation.

[0005] The physical characteristics of sound waves propagating within lung tissue are extremely complex and require further research. However, there is currently no convenient device available for clinical research and practice. Utility Model Content

[0006] The purpose of this invention is to provide a device for detecting acoustic features of the lungs, so as to conveniently, non-invasively, dynamically, repeatably and safely detect patients with lung lesions, especially for patients with endotracheal intubation.

[0007] To solve the above-mentioned technical problems, this utility model provides the following technical solution: a lung acoustic feature detection device, comprising a sound wave emitting device and a sound wave receiving device. The sound wave emitting device is used to emit sound waves of a specific frequency and intensity, and the sound wave receiving device is used to receive and analyze the sound waves. To ensure that the sound waves can smoothly penetrate the blood, air, and lung parenchyma inside the lungs and finally reach the sound wave receiving device, the emission frequency of the sound waves can be between 100-1000Hz. The sound wave emitting device can be a piezoelectric crystal or a diaphragm based on electromagnetic effects. The piezoelectric crystal exhibits both the inverse piezoelectric effect (ultrasonic vibration when energized) and the piezoelectric effect (generating an electrical signal when compressed). The sound wave receiving device can be a piezoelectric crystal or a condenser microphone. Either the sound wave emitting device or the sound wave receiving device can be inserted into the airway through an endotracheal tube, while the other is located on the body surface. The lung acoustic feature detection is used to detect the propagation time or the degree of sound energy attenuation of the sound waves.

[0008] The sound wave propagation time in lung tissue refers to the time it takes for a sound wave to travel between two defined sites inside and outside the lung, representing the speed of sound propagation within the lung tissue. The degree of sound energy attenuation refers to the extent to which the sound wave energy weakens after passing through the lung tissue between the two defined sites inside and outside the lung, representing the acoustic impedance of the lung tissue. The sound wave propagation time, propagation speed, and degree of sound energy attenuation within the lung tissue are used to assess the progression of lung lesions.

[0009] Furthermore, the sound wave emitting device is located at the tip of the sound handle, and the sound handle and the sound wave emitting device can be inserted into the airway through the endotracheal tube, while the sound wave receiving device is placed on the body surface.

[0010] Furthermore, the tip of the sound wave emitting device is equipped with a light source and a camera. The camera is used to capture and record the relative position of the sound wave emitting device in the airway. The camera can also be used in conjunction with the sound handle as part of a visual endotracheal tube.

[0011] Furthermore, the sound handle is made of a flexible material, and at least a pair of opposing directional filaments are provided inside the sound handle. The tail end of the directional filament is connected to a direction controller. When the direction controller is activated, one of the directional filaments can be pulled, causing the sound handle to bend toward the directional filament that is being pulled.

[0012] The steering function and the light-emitting camera function at the tip of the sound handle enable the sound handle not only to emit sound waves, but also to be used as a fiberoptic bronchoscope to guide the sound wave emitting device to accurately enter the secondary bronchus. It can also be used as a flexible endoscopic sight to guide the insertion of endotracheal tubes.

[0013] Furthermore, the tail end of the acoustic handle is provided with a scale to record the relative position of the acoustic handle and the tracheal tube during acoustic testing.

[0014] Furthermore, the tail end of the acoustic handle is provided with an adapter, which includes an endotracheal tube cap, a clamping part, and a ventilation side tube. The endotracheal tube cap is used to connect to the interface at the tail end of the endotracheal tube. The clamping part is made of a soft material and is used to fix the relative position of the acoustic handle and the adapter. The ventilation side tube is used to connect to a ventilator, so that mechanical ventilation of the patient's lungs can be performed simultaneously with acoustic feature detection of the lungs.

[0015] Furthermore, there are multiple sound wave receiving devices, which are placed on the patient's chest and back when in use. Each sound wave receiving device is marked with a symbol corresponding to the anatomy of the human lung, such as VL1, which indicates the left ventral side number 1, and VR1, which indicates the right ventral side number 1.

[0016] Furthermore, the sound wave receiving device is cap-shaped, and the cap-shaped sound wave receiving device includes a fixed brim. The fixed brim is made of a resilient and soft material that can be deformed when pressed and can return to its original shape after the external force is released. The fixed brim is used to fix the sound wave receiving device to the skin and form a sealed cavity between the device and the skin.

[0017] Furthermore, the lung acoustic feature detection device is also equipped with a magnetic field positioning system for locating the distance and orientation between the sound wave emitting device and the sound wave receiving device. The magnetic field positioning system includes a magnetic field generator and magnetic sensors disposed at the sound wave emitting device and the sound wave receiving device. The magnetic sensors detect the positions of the sound wave emitting device and the sound wave receiving device in the magnetic field, and then calculate the distance between them. Using the distance between the sound wave emitting device and the sound wave receiving device and the sound wave propagation time, the propagation speed of the sound wave in the lung tissue is calculated.

[0018] In one exemplary embodiment, the magnetic positioning system does not require an additional magnetic field generator. The magnetic positioning system includes a magnet disposed on a sound stalk and a magnetic sensor disposed on a sound wave receiving device. The magnet and the sound wave emitting device have a fixed relative position. The magnet can generate a magnetic field of a defined magnitude and direction. The magnetic sensor determines the position of the sensor in the magnetic field by sensing the magnitude and direction of the magnetic field.

[0019] Furthermore, the magnet placed near the sound wave emitting device is an exciter, which requires power to generate a specific magnetic field. The magnetic field sensor is a giant magnetoresistive sensor or a tunnel magnetoresistive sensor.

[0020] Furthermore, the sound wave transmitting device and the sound wave receiving device are connected by wire or wireless means.

[0021] Furthermore, when the target of the test is a non-intubated patient, the sound wave emitting device is also placed on the patient's body surface.

[0022] This utility model also provides a method for detecting acoustic features of the lungs, implemented using the aforementioned lung acoustic feature detection device, which detects the sound wave propagation time between two specific points in the lungs, including the following steps:

[0023] Step A: Place the sound wave emitting device and the sound wave receiving device at specific locations inside the airway and on the body surface, respectively;

[0024] Step B: The sound wave emitting device emits a sound wave of a specific frequency, which may be a pulsed sound wave. The sound wave receiving device receives the sound wave of the specific frequency and records the time difference t1 from the start of the sound wave emitting device to the start of the sound wave receiving device receiving the corresponding sound wave.

[0025] Step C: Repeat steps A and B after a specific time period to obtain the time difference t2. By comparing t1 and t2, the speed of sound wave propagation along a specific path in the lungs can be dynamically assessed to evaluate the progression of lung disease.

[0026] This utility model also provides a method for detecting acoustic features of the lungs, which is implemented using the aforementioned lung acoustic feature detection device equipped with a magnetic positioning system. The method detects the sound wave propagation speed between two specific points in the lungs and includes the following steps:

[0027] Step a: Place the sound wave emitting device and the sound wave receiving device at specific locations inside the airway and on the body surface, respectively;

[0028] Step b: The sound wave emitting device emits sound waves of a specific frequency, and the sound wave receiving device receives sound waves of a specific frequency. The time difference t from the start of the sound wave emitting device to the start of the sound wave receiving device receiving the corresponding sound wave is recorded. The distance d between the sound wave emitting device and the sound wave receiving device is confirmed by the magnetic positioning system.

[0029] Step c: Calculate the sound wave propagation speed between the sound wave transmitting device and the sound wave receiving device by using the sound wave propagation time t between the sound wave transmitting device and the sound wave receiving device and the distance d between the sound wave transmitting device and the sound wave receiving device, c = d / t.

[0030] The beneficial effects of this invention are as follows: The lung acoustic feature detection device provided by this invention sets up a sound wave emitting device and a sound wave receiving device at specific points inside and outside the lungs. The sound wave emitting device emits lower frequency, more penetrating sound waves (such as audible sound waves) from within the airway. The sound wave receiving device receives sound waves of corresponding frequencies at designated points outside the lungs, obtaining the propagation time of the sound waves to estimate the propagation speed of the sound waves along a designated path within the lung tissue, dynamically assessing the progression of lung lesions, and also measuring the degree of sound energy attenuation during the propagation of the sound waves along the designated path. By adding a magnetic positioning system to the lung acoustic feature detection device, the distance between the sound wave emitting device and the sound wave receiving device can be measured more accurately, thereby accurately measuring the propagation speed of the sound waves in the lung tissue and the degree of sound energy attenuation. This lung acoustic feature detection device can repeatedly, non-radiatively, and non-invasively measure the acoustic features of a patient's lungs, thereby assessing the progression of lung lesions. Precise calculation of sound wave propagation speed via magnetic navigation helps detect the acoustic characteristics of various lesions at different lesion degrees, thus aiding clinical research and application, and further developing standardized detection methods and reference values. By adding a light-emitting imaging function and an active bending function to the acoustic handle, this lung acoustic feature detection device can also serve as a powerful tool for visual endotracheal intubation. The lung acoustic feature detection device provided by this invention can be used not only for patients with endotracheal intubation but also for patients without endotracheal intubation. Attached Figure Description

[0031] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0032] Figure 1 This is a three-dimensional structural diagram of the present invention;

[0033] Figure 2 For the present utility model Figure 1 Enlarged diagram of point A in the diagram;

[0034] Figure 3 For the present utility model Figure 1 Enlarged diagram of point B in the diagram;

[0035] Figure 4 This is a schematic diagram of the acoustic wave emitting device of this utility model;

[0036] Figure 5 This is a schematic diagram of the sound wave receiving device of this utility model;

[0037] Figure 6This is a schematic diagram of the sound velocity measurement method of this utility model;

[0038] Figure 7 This is a schematic diagram of the working state of this utility model;

[0039] Figure 8 This is one form of the measuring instrument of this utility model;

[0040] The following are the labels in the figure: 1. Sound handle; 11. Sound wave emitting device; 12. Camera; 121. Light source; 13. Directional filament; 2. Sound wave receiving device; 21. Fixed cap brim; 22. Capacitive microphone; 3. Endotracheal tube; 4. Adapter; 41. Endotracheal tube cap; 42. Clamping part; 43. Ventilation side tube. Detailed Implementation

[0041] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0042] Example 1

[0043] Please see Figure 1-8 This invention provides a lung acoustic feature detection device, including a sound wave emitting device 11 and a sound wave receiving device 2. The sound wave emitting device 11 is used to emit sound waves of a specific frequency and intensity, and the sound wave receiving device 2 is used to receive and analyze the sound waves. To ensure that the sound waves can successfully penetrate the blood, air, and lung parenchyma inside the lungs and finally reach the sound wave receiving device 2, the emission frequency of the sound waves can be between 100-1000Hz. The sound wave emitting device 11 can be a piezoelectric crystal or a diaphragm based on electromagnetic effects. Either the sound wave emitting device 11 or the sound wave receiving device 2 can be inserted into the airway through the endotracheal tube 3, while the other is located on the body surface. The lung acoustic feature detection is used to detect the propagation time or the degree of sound energy attenuation of the sound waves. The lung acoustic features include the sound wave propagation speed and the degree of sound energy attenuation, and the degree of sound energy attenuation can be sound energy attenuation or sound energy amplification.

[0044] The sound wave propagation time in lung tissue refers to the time it takes for the sound wave to propagate between two defined sites inside and outside the lung, representing the speed of sound propagation in lung tissue. When the distance between the two measurement sites (i.e., between the sound wave emitting device 11 and the sound wave receiving device 2) is unknown, propagation time is used. In subsequent tests, ensuring that the two measurement sites remain unchanged, the sound wave propagation time is measured again, and the change in time is used to assess the change in the speed of sound propagation. When a specific lung lesion corresponds to a specific speed of sound wave propagation in lung tissue, or when a certain sound wave propagation time corresponds to an imaging examination, subsequent sound wave propagation times can be associated with the lung lesion. The degree of sound energy attenuation is the degree of sound wave energy decay after the sound wave passes through the lung tissue between the two defined sites inside and outside the lung, representing the acoustic impedance of the lung tissue. The sound wave propagation time, propagation speed, and degree of sound energy attenuation in lung tissue are used to assess the progression of lung lesions.

[0045] In one exemplary embodiment, the sound wave emitting device 11 is disposed at the tip of the sound handle 1. The sound handle 1 and the sound wave emitting device 11 can be inserted into the airway through the endotracheal tube. The sound wave receiving device 2 is placed on the body surface to realize the emission of sound waves from one point inside the lungs and the reception of sound waves at multiple points outside the lungs.

[0046] In one exemplary embodiment, the tip of the acoustic wave emitting device 11 is provided with a light source 121 and a camera 12. The camera 12 is used to photograph and record the relative position of the acoustic wave emitting device 11 in the airway during each acoustic measurement. The camera 12 can also be used in conjunction with the acoustic handle 1 as part of a visual endotracheal tube. The relative position of the acoustic wave emitting device 11 inside the trachea and the tracheal carina can be recorded by photographing the relative position of the acoustic wave emitting device 11 inside the airway, or by photographing and recording the corresponding tracheal ring.

[0047] In one exemplary embodiment, the acoustic stem 1 is made of a flexible material, and at least a pair of opposing directional filaments 13 are provided inside the acoustic stem 1. The tail end of the directional filament 13 is connected to a direction controller. When the direction controller is activated, one of the directional filaments 13 can be pulled, causing the acoustic stem 1 to bend in the direction of the pulled directional filament 13, so as to achieve bidirectional or four-way bending during visual endotracheal intubation. The directional function and the light-emitting camera function at the tip of the acoustic stem 1 enable the acoustic stem 1 not only to emit sound waves, but also to be used as a fiberoptic bronchoscope to guide the sound wave emitting device 11 to accurately enter the secondary bronchus or even the sub-secondary bronchus, so as to achieve more accurate acoustic feature detection. Similarly, it can also be used as a visual flexible endoscope to guide the insertion of the endotracheal tube 3.

[0048] In one exemplary embodiment, the tail end of the acoustic handle 1 is provided with a scale to record the relative position of the acoustic handle and the endotracheal tube 3 during acoustic testing.

[0049] In one exemplary embodiment, the tail end of the acoustic handle 1 is provided with an adapter 4. The adapter 4 includes an endotracheal tube cap 41, a clamping part 42, and a ventilation side tube 43. The endotracheal tube cap 41 is used to connect to the interface at the tail end of the endotracheal tube 3. The clamping part 42 is made of a soft material and is used to fix the relative position of the acoustic handle 1 and the adapter 4. The ventilation side tube 43 is used to connect to a ventilator, so that mechanical ventilation of the patient's lungs can be performed while acoustic feature detection of the lungs is being performed.

[0050] In one exemplary embodiment, multiple sound wave receiving devices 2 are used, placed on the patient's chest and back respectively. Each sound wave receiving device 2 is marked with an identifier corresponding to the anatomy of the human lung, such as VL1, VL2, VL3, VL4, VR1, VR2, VR3, VR4, where V represents the ventral side, D represents the dorsal side, L represents the left side, and R represents the right side. Due to the current lack of standardized numbering and usage for such detection devices, standardized procedures are needed to ensure the standardized use of this detection. Measurement tables can be referenced. Figure 8 To carry out the design.

[0051] In one exemplary embodiment, the sound wave receiving device 2 is cap-shaped, and the cap-shaped sound wave receiving device 2 includes a fixed cap brim 21. The fixed cap brim 21 is made of a resilient and soft material that can be deformed when pressed and can return to its original shape after the external force is released. The fixed cap brim 21 is used to fix the sound wave receiving device 2 to the skin surface and form a sealed cavity between the device and the skin. This type of technology is routinely used in electrocardiogram detection and is beneficial to the stability of the device during use.

[0052] In one exemplary embodiment, the lung acoustic feature detection device is further provided with a magnetic field positioning system for locating the distance and orientation between the sound wave emitting device 11 and the sound wave receiving device 2. The magnetic field positioning system includes a magnetic field generator and magnetic sensors disposed near the sound wave emitting device 11 and the sound wave receiving device 2. The magnetic sensors have a fixed relative positional relationship with the sound wave emitting device 11 and the sound wave receiving device 2, respectively. The magnetic sensors are used to detect the positions of the sound wave emitting device 11 and the sound wave receiving device 2 in the magnetic field, and then calculate the distance between them. Using the distance between the sound wave emitting device 11 and the sound wave receiving device 2 and the sound wave propagation time, the propagation speed of the sound wave in the lung tissue is calculated.

[0053] In one exemplary embodiment, the magnetic positioning system does not require an additional magnetic field generator. The system includes a magnet disposed on the acoustic stalk 1 and a magnetic sensor disposed on the acoustic wave receiving device 2. The magnet and the acoustic wave emitting device 11 have a fixed relative position. The magnet generates a magnetic field of a defined magnitude and direction. The magnetic sensor determines the sensor's position within the magnetic field by sensing the magnitude and direction of the magnetic field. The magnetic sensor can be a giant magnetoresistive sensor or a tunneling magnetoresistive sensor.

[0054] In one exemplary embodiment, the magnet placed near the sound wave emitting device 11 is an exciter, which generates a specific magnetic field only after being energized.

[0055] In one exemplary embodiment, the sound wave transmitting device 11 and the sound wave receiving device 2 are connected by wire or wireless means.

[0056] When the subject of the test is a non-endotracheal intubated patient, the sound wave emitting device 11 is also placed on the patient's body surface, such as in the intercostal space inside the patient's scapula or below the scapula. Correspondingly, the sound wave receiving device 2 is placed in the intercostal space of the patient's chest. In the two tests, the sound wave emitting device 11 and the sound wave receiving device are placed in the same position respectively.

[0057] To guide the operation of the aforementioned lung acoustic feature detection device, this utility model also provides a lung acoustic feature detection method, implemented using the aforementioned lung acoustic feature detection device, to detect the sound wave propagation time between two specific points in the lung, including the following steps:

[0058] Step A: Place the sound wave emitting device 11 and the sound wave receiving device 2 at specific locations inside the airway and on the body surface, respectively;

[0059] Step B: The sound wave emitting device 11 emits a sound wave of a specific frequency, which may be a pulsed sound wave. The sound wave receiving device 2 receives the sound wave of the specific frequency and records the time difference t1 from the start of the sound wave emitting device 11 emitting the sound wave to the start of the sound wave receiving device 2 receiving the corresponding sound wave.

[0060] Step C: Repeat steps A and B after a specific time period to obtain the time difference t2. By comparing t1 and t2, the speed of sound wave propagation along a specific path in the lungs can be dynamically assessed to evaluate the progression of lung disease.

[0061] This utility model also provides another method for detecting acoustic features of the lungs, which utilizes the aforementioned lung acoustic feature detection device equipped with a magnetic positioning system to detect the sound wave propagation speed between two specific points in the lungs, including the following steps:

[0062] Step a: Place the sound wave emitting device 11 and the sound wave receiving device 2 at specific locations inside the airway and on the body surface, respectively;

[0063] Step b: The sound wave emitting device 11 emits a sound wave of a specific frequency, and the sound wave receiving device 2 receives the sound wave of the specific frequency. The time difference t from the start of the sound wave emitting device 11 emitting the sound wave to the start of the sound wave receiving device 2 receiving the corresponding sound wave is recorded. The distance d between the sound wave emitting device 11 and the sound wave receiving device 2 is confirmed by the magnetic positioning system.

[0064] Step c: Calculate the sound wave propagation speed between the sound wave transmitting device 11 and the sound wave receiving device 2 by using the sound wave propagation time t between the sound wave transmitting device 11 and the sound wave receiving device 2 and the distance d between the sound wave transmitting device 11 and the sound wave receiving device 2, which is c = d / t.

[0065] The progression of lung disease in hospitalized patients, especially those in the intensive care unit, is unpredictable. Diseases include, but are not limited to, pneumonia, pulmonary edema, interstitial pulmonary edema, pulmonary embolism, pneumothorax, atelectasis, and hyperinflation. Ultrasound technology is the most convenient and non-invasive bedside examination device; however, due to its high frequency and poor penetrability, it cannot penetrate bone or gas. Furthermore, the propagation speed in bone and gas differs significantly from its propagation speed of 1540 m / s in soft tissue. Therefore, the lungs are a restricted area for ultrasound examination, and only simple imaging can be achieved using ultrasound artifacts. This invention features a sound wave emitting device 11 and a sound wave receiving device 2 installed at specific points inside and outside the lungs. The sound wave emitting device 11 emits sound waves with lower frequencies and stronger penetration from within the airway, even at frequencies as low as audible (20-20000Hz). Sound waves of appropriate energy can easily penetrate the lungs and even the ribs. The sound wave receiving device 2 receives sound waves of corresponding frequencies at designated points outside the lungs, obtaining the propagation time of the sound waves to estimate the propagation speed of the sound waves along a designated path within the lung tissue, dynamically assessing the progression of lung lesions. It can also measure the degree of sound energy attenuation during the propagation of sound waves along the designated path, or the amplification of sound energy due to the "speaker effect" produced by the diseased lung. By adding a magnetic positioning system to the lung acoustic feature detection device, the distance between the sound wave emitting device 11 and the sound wave receiving device 2 can be measured more accurately, thereby precisely measuring the propagation speed of sound waves in the lung tissue and the degree of sound energy attenuation. This will help the medical system establish acoustic characteristic reference values ​​for various lesions at different degrees, such as the range of sound velocity fluctuations in lung tissue during mild and severe pulmonary edema. Unfortunately, there is currently a lack of such convenient tools, which greatly limits clinical research and application. With the lung acoustic characteristic detection device provided by this invention, patients' lung lesions can be assessed anytime, repeatedly, without radiation, and non-invasively, without the need for X-rays or CT scans. Once clinical research data and corresponding reference values ​​are available, the assessment of lung acoustic characteristics will become more convenient and standardized.

[0066] Furthermore, the lung acoustic feature detection device provided by this invention, equipped with active bending and light-emitting imaging functions, can also serve as a convenient tool for visual endotracheal intubation, and as a multifunctional airway management device for use in anesthesiology departments, emergency departments, intensive care units, etc. The lung acoustic feature detection device provided by this invention can be used not only for intubated patients but also for non-intubated patients.

[0067] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

Claims

1. A lung acoustic feature detection device, characterized in that: It includes a sound wave emitting device and a sound wave receiving device. The sound wave emitting device is used to emit sound waves of a specific frequency and intensity, and the sound wave receiving device is used to receive and analyze the sound waves. One of the sound wave emitting device and the sound wave receiving device can be inserted into the airway through the endotracheal tube, and the other is located on the body surface. The lung acoustic feature detection is used to detect the propagation time of the sound waves or the degree of sound energy attenuation in the lung tissue.

2. The lung acoustic feature detection device according to claim 1, characterized in that: The sound wave emitting device is located at the tip of the sound handle, and the sound handle and the sound wave emitting device can be inserted into the airway through the endotracheal tube. The sound wave receiving device is placed on the body surface.

3. The lung acoustic feature detection device according to claim 2, characterized in that: The tip of the sound wave emitting device is equipped with a light source and a camera. The camera is used to capture and record the relative position of the sound wave emitting device in the airway.

4. The lung acoustic feature detection device according to claim 2, characterized in that: The tail end of the acoustic handle is provided with a scale to record the relative position of the acoustic handle and the endotracheal tube during acoustic testing.

5. The lung acoustic feature detection device according to claim 2, characterized in that: The tail end of the sound handle is provided with an adapter, which includes an endotracheal tube cap, a clamping part, and a ventilation side tube. The endotracheal tube cap is used to connect to the interface at the tail end of the endotracheal tube. The clamping part is made of soft material and is used to fix the relative position of the sound handle and the adapter. The ventilation side tube is used to connect to a ventilator.

6. The lung acoustic feature detection device according to claim 2, characterized in that: The sound wave receiving device is cap-shaped, and the cap-shaped sound wave receiving device includes a fixed brim. The fixed brim is made of a resilient and soft material that can be deformed when pressed and can return to its original shape after the external force is released, so as to fix the sound wave receiving device to the skin and form a sealed cavity between the device and the skin.

7. The lung acoustic feature detection device according to claim 2, characterized in that: The lung acoustic feature detection device is also equipped with a magnetic field positioning system to determine the distance and orientation between the sound wave emitting device and the sound wave receiving device.

8. The lung acoustic feature detection device according to claim 3, characterized in that: The sound handle is made of a flexible material and has at least one pair of opposing directional filaments inside. The tail end of the directional filament is connected to a direction controller. When the direction controller is activated, it can pull one of the directional filaments, causing the sound handle to bend toward the directional filament in which it is being pulled.

9. The lung acoustic feature detection device according to claim 7, characterized in that: The magnetic field positioning system includes a magnetic field generator and magnetic sensors installed in the sound wave emitting device and the sound wave receiving device. The magnetic sensors are used to detect the positions of the sound wave emitting device and the sound wave receiving device in the magnetic field, and then calculate the distance between them.

10. A lung acoustic feature detection device according to claim 9, characterized in that: The magnetic field positioning system includes a magnet disposed on the sound handle and a magnetic sensor disposed on the sound wave receiving device.

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