Detection device for collecting diaphragmatic breathing movement curves and diaphragm electromyographic signals

Abstract

The utility model discloses a detection device of abdominal breathing movement curve and diaphragm electromyogram signal collection, include: double -cavity catheter, thin wall low elasticity balloon, three -way valve, pressure sensor and electrode, thin wall low elasticity balloon sets up in the distal end of first channel, three -way valve sets up in the proximal end of first channel, pressure sensor is used for gathering the pressure data in first channel, electrode stretches out from the second channel distal end, and be used for connecting the diaphragm of detection object to gather the electromyogram of diaphragm, electrode is connected with the wire, the wire is along second channel setting and stretches out from the proximal end. The utility model discloses can gather breathing movement curve and diaphragm electromyogram simultaneously, and simple structure and high detection accuracy.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of medical experimental equipment, in particular to a detection device for collecting abdominal breathing movement curve and diaphragm electromyography signal. BACKGROUND

[0002] Respiratory regulation experiment is a basic teaching experiment in human function courses. In this experiment, by observing the physiological state changes of experimental animals such as rabbits under different breathing conditions, students can more intuitively understand the law of respiratory movement.

[0003] At present, the device and method for collecting respiratory movement curve of experimental animals such as rabbits and rats mainly include respiratory flow sensor, chest band transducer and xiphoid tracing method. Among them, the respiratory flow sensor can only collect lung ventilation data, and cannot evaluate the contractility and excitability of respiratory muscle movement. Compared with the invasive measurement method, the chest band transducer has low precision. The xiphoid tracing method can only record the vertical displacement of the xiphoid, and has the problems of large trauma and external mechanical transmission easily disturbed by external force.

[0004] The core purpose of collecting the electromyography signal of the diaphragm of the animal is to deeply explore the complex mechanism of respiratory control, the physiological function of the diaphragm, and the neural regulation path of the diaphragm by precisely monitoring the electrophysiological activity of the diaphragm. At present, the method for collecting the electromyography signal of the diaphragm mainly places the electrode directly on the bottom surface of the diaphragm. This method has the problem of large incision, which can easily cause pneumothorax and other conditions of the experimental animal, thereby affecting the experimental results. CONTENT OF THE INVENTION

[0005] In view of the above problems, the present application provides a detection device for collecting abdominal breathing movement curve and diaphragm electromyography signal, which is used to solve the technical problems of low precision and large trauma of the above method.

[0006] To achieve the above purpose, the present application provides a detection device for collecting abdominal breathing movement curve and diaphragm electromyography signal, which comprises:

[0007] A double-lumen catheter comprising two parallel first and second channels;

[0008] A thin-walled low-elasticity balloon is arranged at the distal end of the first channel and communicates with the first channel;

[0009] A three-way valve is arranged at the proximal end of the first channel, and a first port is connected to the proximal end of the first channel, a second port is connected to a pressure sensor, and a third port is used to connect a pressurizing device; the pressurizing device is used to inject fluid into the first channel, so that the thin-walled low-elasticity balloon is inflated and adheres to the diaphragm of the detection object; the pressure sensor is used to collect pressure data in the first channel;

[0010] an electrode extending out of the distal end of the second channel and used for connecting the diaphragm of the detection object to collect the electromyography of the diaphragm, the electrode being connected with a wire, the wire being arranged along the second channel and extending out of the proximal end.

[0011] Further, the pressurizing device is a syringe used for adding gas or liquid to the first channel, or the pressurizing device is a gas pump used for adding gas to the first channel.

[0012] Further, the electrode is in the shape of a hook-shaped electrode, and the detection device comprises one or two electrodes.

[0013] Further, the wire is selected from a single-core shielded wire or a double-core shielded wire.

[0014] Further, the connection between the electrode and the wire is coated with an insulating layer.

[0015] Further, the thin-walled low-elasticity balloon is made of silica gel and has a size of 2-3 cm.

[0016] Further, the thin-walled low-elasticity balloon is connected to a port at the distal end of the first channel, and the distal end of the second channel is provided with a second opening, and the electrode extends out of the second channel from the second opening.

[0017] Further, the distal end of the first channel is provided with a first opening, and the thin-walled low-elasticity balloon is arranged on the side wall of the distal end of the first channel and communicates with the first opening, and the electrode extends out of the port at the distal end of the second channel.

[0018] Further, the double-lumen catheter is a flexible plastic tube or a flexible rubber tube.

[0019] Different from the prior art, the detection device for collecting the abdominal breathing movement curve and the electromyography of the diaphragm can simultaneously collect the breathing movement curve and the electromyography of the diaphragm of the animal. Moreover, the above technical solution does not need to use a flow sensor, but only needs a thin-walled low-elasticity balloon to cooperate with a pressure sensor to collect the breathing movement curve, and the structure is simple and the detection precision is high. In the technical solution, the wire for arranging the electrode is arranged by using the double-lumen catheter, so that the whole device structure is compact, and it is convenient to use and operate.

[0020] The above content related to the utility model is only a summary of the technical solution of the present application. In order to enable those skilled in the art to more clearly understand the technical solution of the present application, and then can be implemented according to the content recorded in the specification and drawings, and in order to enable the above-mentioned purposes and other purposes, characteristics and advantages of the present application to be more easily understood, the following is described in combination with the specific embodiments and drawings of the present application. BRIEF DESCRIPTION OF DRAWINGS

[0021] The accompanying drawings are only used to illustrate the principles, implementation manners, applications, characteristics and effects of the specific embodiments and other related contents of the present application, and cannot be considered as limiting the present application.

[0022] In the drawings:

[0023] Figure 1 The structure schematic diagram of the detection device for collecting the abdominal breathing movement curve and the diaphragm electromyogram is described in the specific embodiment;

[0024] Figure 2 The real sketch diagram of the detection device for collecting the abdominal breathing movement curve and the diaphragm electromyogram is described in the specific embodiment;

[0025] Figure 3 The waveform diagram of the collected breathing movement curve and the diaphragm electromyogram without data measurement is described in the specific embodiment;

[0026] Figure 4 The schematic diagram of the comparison of the two curves is described in the specific embodiment; Figure 3

[0027] Figure 5 The schematic diagram of the data measurement of the two curves is described in the specific embodiment;

[0028] The reference signs in the above drawings are explained as follows:

[0029] 1, double-lumen catheter; 2, thin-walled low-elasticity balloon; 3, electrode; 4, pressure sensor; 5, three-way valve; 6, pressurizing device; 7, BL-420E biological function experiment system;

[0030] 11, first channel; 12, second channel; 110, first opening; 120, second opening; DETAILED DESCRIPTION

[0031] In order to describe the possible application scenarios, technical principles, specific schemes that can be implemented, purposes and effects that can be achieved of the present application in detail, the following will be described in detail in combination with the specific embodiments listed and the drawings. The embodiments described in the present text are only used to more clearly illustrate the technical schemes of the present application, and therefore only serve as examples, and cannot limit the protection scope of the present application.

[0032] ​The term "embodiment" is mentioned herein means that the specific features, structures, or characteristics described in connection with the embodiment can be included in at least one embodiment of the present application. The term "embodiment" appearing in various places in the specification does not necessarily refer to the same embodiment, nor does it particularly limit the independence or association between other embodiments. In principle, in the present application, as long as there is no technical contradiction or conflict, the technical features mentioned in each embodiment can be combined in any way to form a corresponding implementable technical solution.

[0033] Unless otherwise defined, the meanings of the technical terms used herein are the same as those commonly understood by those skilled in the art to which the present application belongs; the use of related terms herein is only for the purpose of describing specific embodiments, and is not intended to limit the present application.

[0034] In the description of the present application, the phrase "and / or" is a description of the logical relationship between the objects, which means that there can be three relationships, for example, A and / or B, which means that there are three cases: A exists, B exists, and A and B exist at the same time. In addition, the character " / " herein generally represents that the associated objects before and after are a "or" logical relationship.

[0035] In the present application, the terms such as "first" and "second" are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual quantity, primary and secondary or order relationship between the entities or operations.

[0036] In the present application, without more limitation, the "includes", "contains", "has" or other similar expressions used in the sentence are intended to cover non-exclusive inclusion, and these expressions do not exclude the presence of other elements in the process, method or product including the described elements, so that the process, method or product including a series of elements can not only include those limited elements, but also include other elements not explicitly listed, or also include the elements inherent to such process, method or product.

[0037] As the same as the understanding in the "Guidelines for Examination", in the present application, the expressions such as "greater than", "less than", "exceed" are understood as not including the number; the expressions such as "above", "below", "within" are understood as including the number. In addition, in the description of the embodiments of the present application, the meaning of "multiple" is more than two (including two), and similar expressions related to "multiple" are also understood in this way, for example, "multiple groups", "multiple times", etc., unless otherwise explicitly limited.

[0038] In the description of the embodiments of the present application, the spatial relative expressions used, such as "central", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "vertical", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", and the like, indicate the orientation or positional relationship shown in the specific embodiments or the drawings, and are only used to facilitate the description of the specific embodiments of the present application or to facilitate the understanding of the reader, and do not indicate or imply that the indicated device or component must have a particular position, a particular orientation, or be constructed or operated in a particular orientation, and therefore cannot be understood as a limitation on the embodiments of the present application.

[0039] Unless otherwise explicitly specified or limited, in the description of the embodiments of the present application, the terms "mount", "connect", "connect", "fix", "set", and the like should be understood broadly. For example, the "connection" can be fixed connection, or detachable connection, or integral setting; it can be mechanical connection, or electrical connection, or communication connection; it can be direct connection, or indirect connection through intermediate medium; it can be the internal communication of two elements or the interaction relationship between two elements. For those skilled in the art to which the present application belongs, the specific meaning of the above terms in the embodiments of the present application can be understood according to the specific circumstances.

[0040] Please refer to Figures 1 to 5 To solve the technical problems in the related art that the respiratory movement curve of the animal is collected by the flow sensor, the contractility and excitability of the respiratory muscle movement cannot be evaluated, the detection accuracy of the chest belt transducer is low, and the electrode 3 is directly placed into the bottom surface of the diaphragm to collect the electromyogram of the diaphragm, which has a large incision and is easy to cause pneumothorax. The present embodiment provides a detection device for collecting the abdominal respiration movement curve and the electromyogram of the diaphragm. In the present embodiment, commonly used consumables such as double-lumen catheter 1, thin-walled low-elasticity balloon 2, electrode 3, and pressure sensor 4 are used to make. The device can be applied to experimental teaching in the medical field, and has simple structure, high detection accuracy, can collect the respiratory movement curve and the electromyogram of the diaphragm at the same time, improves the experimental efficiency and teaching interactivity, reduces the teaching cost, and helps the innovation of classroom teaching.

[0041] As Figure 1As shown, the detection device for collecting abdominal respiration movement curve and diaphragm electromyogram signal comprises a double-lumen catheter 1, a thin-walled low-elasticity balloon 2, a three-way valve 5, an electrode 3 and a pressure sensor 4. The double-lumen catheter 1 comprises two parallel first and second channels 11 and 12. The thin-walled low-elasticity balloon 2 is arranged at the distal end of the first channel 11 and communicates with the first channel 11. The three-way valve 5 is arranged at the proximal end of the first channel 11, the first port of the three-way valve 5 is connected with the proximal end of the first channel 11, the second port is connected with the pressure sensor 4, and the third port is used for connecting a pressurizing device 6. The pressurizing device 6 is used for injecting fluid into the first channel 11 so that the thin-walled low-elasticity balloon 2 is inflated and adheres to the diaphragm of the detection object. The pressure sensor 4 is used for collecting pressure data in the first channel 11. The electrode 3 extends from the distal end of the second channel 12 and is used for connecting the diaphragm of the detection object to collect the electromyogram signal of the diaphragm. The electrode 3 is connected with a lead wire, and the lead wire is arranged along the second channel 12 and extends from the proximal end.

[0042] In the embodiment, the double-lumen catheter 1 comprises two parallel first and second channels 11 and 12. The thin-walled low-elasticity balloon 2 is arranged at the distal end of the first channel 11 of the double-lumen catheter 1. The three-way valve 5 is arranged at the proximal end of the first channel 11. The second channel 12 of the double-lumen catheter 1 is used for arranging the electrode 3 and the lead wire connected with the electrode 3. The electrode 3 extends from the distal end of the second channel 12 and is used for connecting the diaphragm of the detection object to collect the electromyogram signal of the diaphragm. The lead wire is arranged along the second channel 12 and extends from the proximal end. The lead wire can be connected with the electromyogram signal input end of the BL-420E biological function experiment system 7. The collected electromyogram signal is displayed through the BL-420E biological function experiment system 7.

[0043] The first port of the three-way valve 5 is connected with the proximal end of the firstchannel 11, the second port is connected with the pressure sensor 4, and the third portis connected with the pressurizing device 6. The pressurizing device 6 is used forinjecting fluid (which can be gas or liquid) into the first channel 11 so that the thin-walled low-elasticity balloon 2 can be inflated and adheres to the diaphragm of therabbit detection object (the diaphragm below refers to the position below the diaphragm, i.e., the upper abdominal area). Then, the pressure sensor 4 is connected with the first channel 11 by controlling the three-way valve 5 (at this time, the pressurizing device 6 is disconnected with the first channel 11). When the rabbit detection object breathes, the diaphragm below will move accordingly, so as to squeeze the thin-walled low-elasticity balloon 2, thereby causing the pressure in the first channel 11 to change. The pressure change can be detected through the pressure sensor 4. Since the pressure change amount is proportional to the movement amplitude (i.e., the respiratory airflow) of the diaphragm below of the detection object, the respiration movement curve can be obtained by analyzing the pressure change amount. The output end of the pressure sensor 4 is connected with the BL-420E biological function experiment system 7. The waveform of the output data of the pressure sensor 4 can be displayed through the BL-420E biological function experiment system 7.

[0044] The pressurizing device 6 is a syringe for adding gas or liquid to the first channel 11. In another embodiment, the pressurizing device 6 is a gas pump for adding gas to the first channel 11. The three-way valve 5 can be a medical three-way valve, which includes at least three ports, a valve core and a knob connected to the valve core inside. By rotating the knob, the direction of the channel in the valve core can be controlled, so that the first channel 11 is connected to the pressure sensor 4 or the pressurizing device 6.

[0045] In the embodiment, the double-lumen catheter 1 is a flexible plastic tube or a flexible rubber tube. The double-lumen catheter 1 can be obtained by modifying a double-lumen urinary catheter. The double-lumen urinary catheter is used as the main body, and the air bag of the urinary catheter is cut off (the hard valve for water injection can be optionally cut off), and only the main body of the double-lumen urinary catheter is retained.

[0046] The single-core shielded wire is welded, and the exposed part is wrapped or coated with an insulating material (if the double electrode is insulated, the distance between the double electrodes needs to be maintained to avoid short circuiting of the electrodes).

[0047] As shown in Figure 1 and Figure 2 In the embodiment, the shape of the electrode 3 is a hook-shaped electrode, and the detection device includes one electrode 3 or two electrodes 3. Whether it is a single electrode or a double electrode, the BL-420F biological function experiment system can collect the electromyographic signal. In the single electrode mode, the BL-420F biological function experiment system takes the internal zero potential as the reference voltage and compares it with the electrical signal collected by the electrode 3 to obtain the electromyographic signal. In the double electrode mode, the two electrodes 3 are connected to different positions on the diaphragm and maintain a certain distance, and the BL-420F biological function experiment system obtains the electromyographic signal by using the potential pressure of the two electrodes 3. The hook-shaped electrode can be made by bending a 0.30 mm electrode 3 needle. The hook-shaped electrode can stably connect the electrode 3 to the diaphragm and avoid the electrode 3 from falling off during the experiment. The wire is selected from a single-core shielded wire or a double-core shielded wire. The connection between the electrode 3 and the wire is coated with an insulating layer.

[0048] The material of the thin-walled low-elasticity balloon 2 is silica gel, and the size is 2-3 cm.

[0049] As shown in Figure 1 In the embodiment, the side wall of the distal end of the second channel 12 is provided with a second opening 120, the thin-walled low-elasticity balloon 2 is arranged at the distal end of the first channel 11 and communicates with the port at the distal end, and the electrode 3 extends from the second opening 120 at the distal end of the second channel 12.

[0050] As shown in Figure 2As shown, a first opening 110 is provided on the side wall at the distal end of the first channel 11. The thin-walled low-elasticity balloon 2 is disposed on the outer wall at the distal end of the first channel 11 (i.e., not at the very end of the distal end) and communicates with the first opening 110. The electrode 3 extends from the port at the distal end of the second channel 12.

[0051] Figure 2 The illustrated embodiments and Figure 1 The difference in the illustrated embodiment is that the positions of electrode 3 and thin-walled, low-elasticity balloon 2 are slightly adjusted. Figure 1 In the illustrated embodiment, the thin-walled, low-elasticity balloon 2 is located at the distal port of the first channel 11, while the electrode 3 does not extend to the distal port of the second channel 12, but rather protrudes from a second opening 120 in the sidewall of the second channel 12 near the port location. Figure 2 In the illustrated embodiment, electrode 3 extends from the distal port of the second channel 12, while the thin-walled, low-elasticity balloon 2 communicates with the first opening 110 on the sidewall of the first channel 11. Both of these methods are feasible.

[0052] The process of collecting electromyographic signals of respiratory movement curves using the above-mentioned detection device on rabbits is as follows:

[0053] A small incision is made below the xiphoid process of a rabbit, allowing a deflated, thin-walled, low-elasticity balloon 2 (i.e., a collapsed balloon) to be inserted, while ensuring that an inflated balloon will not dislodge. Using hemostatic forceps, the distal end of the device is inserted between the diaphragm and liver. Electrode 3 is then connected to the diaphragm to collect electromyographic signals from the diaphragm, and the distal end is fixed to the diaphragm. Figure 1 In the embodiment shown, electrode 3 is fixed below the diaphragm, behind the xiphoid process; Figure 2 In the illustrated embodiment, electrode 3 is fixed below the right diaphragm. After electrode 3 is fixed, fluid is injected into the first channel 11 to inflate the thin-walled, low-elasticity balloon 2 tightly against the diaphragm. Then, the three-way valve 5 is rotated to connect the first channel 11 with the pressure sensor 4, i.e., the thin-walled, low-elasticity balloon 2 is connected to the pressure sensor. Finally, electrode 3 and the pressure sensor are connected to the BL-420F biological function experimental system, which synchronously acquires the abdominal breathing movement curve of the rabbit and the electromyographic signals of the diaphragm. In other embodiments, a biological function experimental system with the same function can be used instead of the BL-420F biological function experimental system described above.

[0054] During the data collection process, the diaphragm moves up and down with respiration. This movement compresses the thin-walled, low-elasticity balloon 2, causing changes in its internal pressure. Pressure sensors detect these pressure changes within the balloon 2, reflecting the changes in the rabbit's respiratory movements. Simultaneously, the electromyographic (EMG) signal of the diaphragm is closely related to its contraction and relaxation. The EMG signal is a prerequisite for diaphragmatic contraction, and its frequency and intensity affect the frequency and intensity of the diaphragm's contraction and relaxation. For example...Figure 3 As shown, when the rabbit inhales, the electromyographic (EMG) signal of the diaphragm occurs before the diaphragm contracts, and the frequency of the EMG signal rapidly increases, generating a series of action potentials. The diaphragm contracts, the thoracic cavity expands, and the force squeezing the thin-walled, low-elasticity balloon 2 increases, leading to an increase in fluid pressure within the balloon. When the rabbit exhales, the passive exhalation phase begins before the EMG signal of the diaphragm nearly ceases. The frequency of the diaphragm's EMG signal rapidly decreases, the number of action potentials decreases until it returns to baseline, the diaphragm relaxes, the thoracic cavity recoils, and the intra-abdominal pressure rapidly decreases, as does the fluid pressure within the balloon. Through synchronous comparative analysis of the pressure curve and the EMG signal curve, a specific temporal relationship between the diaphragm discharge signal and diaphragmatic respiratory movements can be observed.

[0055] like Figure 3 and Figure 4 As shown, the onset of the diaphragmatic discharge signal is slightly earlier than the start of the diaphragmatic contraction, while the termination of the discharge signal is slightly later than the end of the diaphragmatic contraction. This phenomenon is particularly evident in the respiration of rabbits.

[0056] When the rabbit inhales, the diaphragm contracts and compresses the balloon downwards, causing the pressure inside the balloon to rise, and the pressure curve to rise from the baseline level. Because the thin-walled, low-elasticity balloon 2 used in this experiment is filled with liquid, and liquid is incompressible, the balloon, after being compressed by the diaphragm, will compress the abdominal organs downwards. When inhalation stops, the pressure inside the balloon quickly reaches equilibrium with atmospheric pressure, and the pressure curve returns to the baseline level.

[0057] During exhalation in rabbits, the diaphragm relaxes, the abdominal pressure decreases rapidly, and the pressure inside the balloon also decreases, causing the pressure curve to drop from the baseline level. Similarly, due to the incompressibility of fluids, the pressure inside the balloon quickly equalizes with atmospheric pressure, and the pressure curve returns to the baseline level. By simultaneously collecting the rabbit's abdominal respiratory movement curve and diaphragmatic discharge signal, real-time data such as the rabbit's respiratory rate, active inspiratory speed, inspiratory amplitude (depth), diaphragmatic discharge duration, diaphragmatic discharge integral area, and the correspondence between discharge and inspiratory duration can be obtained. However, when there are significant volume differences between individual rabbits, this area value can only be used for comparison within the same individual before and after intervention.

[0058] like Figure 5 The figure shows a schematic diagram of data measurement using two curves. The rabbit's respiratory rate was 42 cpm, the total diaphragmatic discharge area was 901.04 uV*s, the inspiratory / expiratory ratio was 1.21, the average inspiratory depth was 0.23 mmHg, the fastest inspiratory rate was 0.04 mmHg / ms, and the plateau time (holding breath) was 0.18 s.

[0059] Finally, it should be noted that although the above embodiments have been described in the text and drawings of this application, this should not limit the scope of patent protection of this application. Any technical solutions that are based on the essential concept of this application and utilize the content described in the text and drawings of this application, resulting in equivalent structural or procedural substitutions or modifications, as well as the direct or indirect application of the technical solutions of the above embodiments to other related technical fields, are all included within the scope of patent protection of this application.

Claims

1. A detection device for acquiring abdominal breathing motion curves and diaphragmatic electromyographic signals, characterized in that, include: A double-lumen catheter, wherein the double-lumen catheter includes two parallel first channels and second channels; A thin-walled, low-elasticity balloon is disposed at the distal end of the first channel and is connected to the first channel; A three-way valve is located at the proximal end of the first channel, with the first port connected to the proximal end of the first channel, the second port connected to the pressure sensor, and the third port used to connect to the pressurization device. The pressurizing device is used to inject fluid into the first channel, causing the thin-walled, low-elasticity balloon to inflate and adhere to the diaphragm of the object being tested; the pressure sensor is used to collect pressure data within the first channel. An electrode extends from the distal end of the second channel and is used to connect to the diaphragm of the test subject to collect electromyographic signals of the diaphragm. The electrode is connected to a wire that is arranged along the second channel and extends from the proximal end.

2. The detection device for acquiring abdominal breathing motion curves and diaphragmatic electromyography signals according to claim 1, characterized in that, The pressurizing device is a syringe used to add gas or liquid into the first channel, or the pressurizing device is an air pump used to add gas into the first channel.

3. The detection device for acquiring abdominal breathing motion curves and diaphragmatic electromyography signals according to claim 1, characterized in that, The electrode is hook-shaped, and the detection device includes one or two of the electrodes.

4. The detection device for acquiring abdominal breathing motion curves and diaphragmatic electromyography signals according to claim 1, characterized in that, The conductor is selected as a single-core shielded wire or a double-core shielded wire.

5. The detection device for acquiring abdominal breathing motion curves and diaphragmatic electromyography signals according to claim 4, characterized in that, An insulating layer is coated at the connection between the electrode and the wire.

6. The detection device for acquiring abdominal breathing motion curves and diaphragmatic electromyography signals according to claim 1, characterized in that, The thin-walled, low-elasticity balloon is made of silicone and measures 2-3 cm in size.

7. The detection device for acquiring abdominal breathing motion curves and diaphragmatic electromyography signals according to claim 1, characterized in that, The thin-walled, low-elasticity balloon is connected to the port at the distal end of the first channel; the sidewall at the distal end of the second channel is provided with a second opening, and the electrode extends out of the second channel from the second opening.

8. The detection device for acquiring abdominal breathing motion curves and diaphragmatic electromyography signals according to claim 1, characterized in that, The first channel has a first opening on its distal sidewall, the thin-walled low-elasticity balloon is disposed on the distal sidewall of the first channel and communicates with the first opening, and the electrode extends from the distal port of the second channel.

9. The detection device for acquiring abdominal breathing motion curves and diaphragmatic electromyography signals according to claim 1, characterized in that, The dual-lumen catheter is a flexible plastic tube or a flexible rubber tube.

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