Lung function tester with auxiliary reminding function

Abstract

The utility model discloses a lung function tester with an auxiliary reminding function, and belongs to the technical field of lung function testers. The device comprises a host, a display electrically connected with the host, a data input device, a breathing pipeline installed on one side of the host through an adjusting support, an air leakage detection assembly and a prompt display electrically connected with the host, and the tail end of the breathing pipeline is provided with a replaceable mouthpiece; the air leakage detection assembly comprises a pickup cover, a horn-shaped collection cover, a fixing sleeve and an array microphone. And the prompt display is fixed above the breathing pipeline in front of the patient. On the basis of an original lung function tester, an air leakage detection assembly used for detecting air blowing and air leakage is additionally arranged, and a prompt displayer capable of correctly guiding a patient to breathe is additionally arranged. The burden of oral guidance of a doctor in the lung function examination process is relieved, and the problem of oral error possibly existing in manual guidance is also avoided.

Description

Technical Field

[0001] This utility model relates to a lung function testing instrument with auxiliary reminder function, and belongs to the technical field of lung function testing instruments. Background Technology

[0002] Pulmonary function testing equipment is primarily used to assess a patient's respiratory function. It measures indicators related to ventilation function, such as vital capacity (VC), which is the total amount of air that can be exhaled in a single, maximal inhalation, reflecting lung volume; forced vital capacity (FVC) and forced expiratory volume in one second (FEV1); the FEV1 / FVC ratio can determine the presence of airflow limitation and is crucial for the diagnosis of asthma, chronic obstructive pulmonary disease (COPD), and other conditions. In clinical applications, it can serve as a diagnostic tool for respiratory diseases, be used to assess treatment effectiveness, and perform preoperative respiratory function assessments for surgical patients.

[0003] Currently, commercially available pulmonary function testing devices mainly consist of a main unit, display screen, keyboard, mouse, breathing tubing, and sensors. The sensors are located in the rear half of the breathing tubing and are primarily used to collect respiratory data. The main unit is responsible for recording and analyzing the data collected by the sensors. Doctors mainly use the keyboard and mouse to open and use the software accompanying the testing device, while the display screen shows the interface and test information. The main shortcomings of current pulmonary function testing devices are the lack of standardized guidance and the inability to detect improper patient behavior during testing. For example, if medical staff cannot properly guide patients, patients will find it difficult to judge their own breathing patterns and the adequacy of exhalation. Furthermore, whether the patient's mouth is fully sealed to the mouthpiece during exhalation has a significant impact on the accuracy of the results; currently, it is difficult to detect air leakage caused by the patient's mouth not sealing properly during exhalation.

[0004] Therefore, a pulmonary function testing device with auxiliary reminder functions was designed. Based on the existing pulmonary function testing device, a leak detection component for detecting air leakage during exhalation was added, along with a prompt display to correctly guide the patient's breathing. This reduces the burden of verbal guidance for doctors during pulmonary function testing and avoids potential verbal errors during manual guidance. Summary of the Invention

[0005] The technical problem to be solved by this utility model is to provide a pulmonary function testing instrument with auxiliary reminder function, which solves the problem that current pulmonary function testing instruments cannot remind patients to maintain the correct breathing mode during the test.

[0006] The technical problem to be solved by this utility model is achieved by the following technical solution:

[0007] A pulmonary function testing device with auxiliary reminder function includes a main unit, a display electrically connected to the main unit, a data input device, and a breathing tube mounted on one side of the main unit via an adjustment bracket. The end of the breathing tube is provided with a replaceable mouthpiece. It also includes a leak detection component and a prompt display electrically connected to the main unit.

[0008] The air leakage detection component includes a pickup cover, a horn-shaped collection cover, a fixing sleeve, and an array microphone. The pickup cover is a cylindrical cavity with an inner diameter larger than the outer diameter of the mouthpiece. A pickup cavity is formed between the pickup cover and the mouthpiece. One end of the pickup cover facing the patient's mouth is connected to a horn-shaped collection cover for collecting leaking airflow. The other end of the pickup cover is provided with a closed end face. A fixing sleeve for fitting onto the mouthpiece is provided in the middle of the closed end face. An exhaust hole is provided on the closed end face surrounding the fixing sleeve. An array microphone composed of multiple microphones is evenly arranged along the circumference of the inner wall of the pickup cover. The array microphone is electrically connected to the main unit.

[0009] The notification display is fixed above the breathing tube directly in front of the patient.

[0010] Preferably, the inner wall of the horn-shaped collecting cover is provided with multiple evenly distributed partitions, the ends of which extend into the microphone cover, and a microphone and an exhaust hole are provided between each pair of adjacent partitions.

[0011] Preferably, the inner wall of the horn-shaped collection cover is provided with four evenly distributed partitions, and correspondingly, four microphones are provided to form an array microphone.

[0012] Preferably, the wires of the array microphone are connected to the display, and the wires of the display and the array microphone are integrated into a single harness inside the display and connected to the host.

[0013] Preferably, a rubber ring adapted to different mouthpiece outer diameters is provided between the fixing sleeve and the mouthpiece.

[0014] The beneficial effects of this invention are: based on the original pulmonary function testing instrument, a leak detection component for detecting air leakage during exhalation is added, as well as a prompt display that can correctly guide the patient's breathing. This reduces the burden of verbal guidance for doctors during pulmonary function testing and avoids potential verbal errors during manual guidance. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0016] Figure 2 A three-dimensional structural diagram of installing a leak detection component and indicator display on a breathing tube;

[0017] Figure 3 A side view of the structure for installing a leak detection component and indicator display on a breathing tube;

[0018] Figure 4 This is a schematic diagram of the internal structure of the air leakage detection component;

[0019] Figure 5 This is a circuit block diagram of the present invention.

[0020] In the diagram: 1. Main unit; 2. Display; 3. Adjustment bracket; 4. Breathing tube; 5. Mouthpiece; 6. Leak detection assembly; 601. Microphone pickup cover; 602. Horn-shaped collection cover; 603. Fixing sleeve; 604. Array microphone; 605. Sound pickup chamber; 606. Exhaust port; 607. Partition partition; 7. Data input device; 8. Indication display; 9. Cart. Detailed Implementation

[0021] To facilitate a clear understanding of the technical means, creative features, objectives, and effects of this utility model, the following description, in conjunction with specific illustrations, further elaborates on this utility model.

[0022] like Figure 1 , Figure 2 , Figure 5 As shown, this pulmonary function testing instrument with auxiliary reminder function includes a main unit 1, a trolley 9 for placing the main unit, a display 2 electrically connected to the main unit 1, a data input device 7, and a breathing tube 4 installed on one side of the main unit 1 via an adjustment bracket 3. The end of the breathing tube 4 is provided with a replaceable mouthpiece 5. It also includes a leak detection component 6 and a prompt display 8 electrically connected to the main unit 1.

[0023] The host (1) is a computer host, and the data input devices (7) include, but are not limited to, a mouse, keyboard, and sensors from existing pulmonary function testing equipment. The monitor (2) displays the software interface of the existing pulmonary function testing equipment. Doctors use the software to begin the various sub-items of pulmonary function testing and observe the patient's respiratory parameters on the monitor (2). The monitor (2) is typically located on the doctor's side and displays the test items, respiratory parameters, and waveforms.

[0024] To provide patients with clear information, a small display screen is added to the breathing tube 4.

[0025] The display 8 is fixed above the breathing tube 4 directly in front of the patient.

[0026] The display screen 8 shows prompts for each sub-item, allowing the patient to see the information directly in front of them during the respiratory test. For example, it displays instructions such as exhalation, inhalation, forced exhalation, forced inhalation, complete exhalation, and rapid breathing, helping the patient complete the test. It can also indicate an invalid test result if there is a leak, requiring a retest.

[0027] like Figure 3 , Figure 4 As shown, the air leakage detection component 6 includes a microphone 601, a horn-shaped collection cover 602, a fixing sleeve 603, and an array microphone 604. The microphone 601 is a cylindrical cavity with an inner diameter larger than the outer diameter of the mouthpiece 5. A microphone cavity 605 is formed between the microphone 601 and the mouthpiece 5. The end of the microphone 601 facing the patient's mouth is connected to the horn-shaped collection cover 602 for collecting leaking air. The other end of the microphone 601 is provided with a closed end face. A fixing sleeve 603 for fitting onto the mouthpiece 5 is provided in the middle of the closed end face. An exhaust hole 606 is provided on the closed end face surrounding the fixing sleeve 603. An array microphone 604 composed of multiple microphones is evenly arranged along the circumference of the inner wall of the microphone 601. The array microphone 604 is electrically connected to the host 1.

[0028] When the patient's mouth is completely sealed with the mouthpiece 5, no airflow enters the horn-shaped collection hood 602, and no wind noise higher than the ambient noise is generated in the sound pickup chamber 605. The array microphone 604 transmits the collected audio signal back to the host 1. After the host 1 determines that there is no prominent wind noise, it prompts the display 8 not to display an air leakage warning.

[0029] When the patient's mouth is not completely sealed with the mouthpiece 5, the air leaking from the corner of the mouth is collected by the horn-shaped collection cover 602 and generates wind noise higher than the ambient noise in the sound pickup cavity 605. The array microphone 604 collects the wind noise audio signal and transmits it back to the host 1. After the host determines the noise, it will output a prompt signal to the patient through the prompt display 8: there is a possibility of air leakage, and a retest is required for more accurate and reliable results.

[0030] Steps for the main unit to determine if there is an air leak:

[0031] (1) After the host 1 is powered on, the array microphone 604 continuously records the noise level;

[0032] (2) When the doctor clicks on a test item, the patient begins the breathing test as prompted, and the array microphone 604 begins recording. When an air leak occurs, the noise recorded by the array microphone 604 suddenly becomes louder (exceeding the set threshold) compared to the ambient noise before the test, indicating a possible air leak and requiring retesting. If the loudness does not exceed the set threshold, it is considered normal.

[0033] like Figure 4As shown, the inner wall of the horn-shaped collecting cover 602 is provided with multiple evenly distributed partition plates 607. The ends of the partition plates 607 extend into the microphone cover 601. A microphone and an exhaust port 606 are provided between every two adjacent partition plates 607. The partition plates 607 are made of sound-absorbing material, which can reduce the influence of wind noise from adjacent partitions, so that the microphone in each partition mainly collects the wind noise signal of its own partition.

[0034] The inner wall of the horn-shaped collection cover 602 is provided with four evenly distributed partition plates 607, and correspondingly, four microphones are provided to form an array microphone 604.

[0035] The wires of the array microphone 604 are connected to the prompt display 8. The wires of the prompt display 8 and the wires of the array microphone 604 are integrated into a single wire harness inside the prompt display 8 and connected to the host 1.

[0036] Multiple partitions 607 are added, and array microphones 604 are placed one by one in the corresponding position of each partition. The wind noise in each partition mainly comes from the airflow within that partition. On the one hand, by comparing the different wind noises received by the microphones in several partitions, it can be determined whether there is a possible air leak; on the other hand, it can also determine the partition from which the air leak originates, so as to remind the patient that there may be an air leak in that partition and that the mouth needs to be closed tightly in that direction. For example, if the wind noise in a certain partition is significantly greater than that in other partitions, it indicates that there is a possibility of an air leak in that partition.

[0037] A rubber ring (not shown in the figure) is provided between the fixing sleeve 603 and the bite 5 to accommodate different outer diameters of the bite 5. It is fixed by squeezing the rubber ring.

[0038] The following measurements were performed using a pulmonary function testing device with auxiliary reminder functions:

[0039] I. Vital Capacity (VC) Test Method

[0040] Preparation:

[0041] The subject should be in a relaxed state, generally standing or sitting, keeping the body upright and the head in a natural position, avoiding excessive forward or backward tilting.

[0042] Fit the nose clip onto the subject to ensure a complete nasal seal and prevent air leakage. Then, have the subject hold the mouthpiece in their mouth, ensuring a tight seal around the lips to prevent air leakage.

[0043] Testing process:

[0044] Guided instructions and visuals are displayed on the prompt screen 8. First, the subject is instructed to take several calm breaths to familiarize themselves with the rhythm and feeling of breathing. Then, the subject is guided to take a slow and complete inhalation, inhaling as deeply as possible until they feel their lungs are completely full of air, just like taking a deep breath, but to the maximum extent possible.

[0045] Next, the subject is instructed to exhale slowly and steadily, expelling all the air from their lungs. This exhalation should continue until the subject feels they can exhale no more air. During this process, the pulmonary function testing device automatically records the volume of exhaled air; this volume is the vital capacity.

[0046] II. Forced Vital Capacity (FVC) Test Method

[0047] Preparation: The preparation is basically the same as that for the lung capacity test, including instrument calibration, subject posture (standing or sitting), wearing the nose clip and holding the mouthpiece, etc.

[0048] Testing process:

[0049] The prompt display 8 plays guiding instructions and images, instructing the test subject to take a deep breath, forcefully and as deeply as possible, so that the lungs reach the total lung capacity, that is, the lungs expand to the maximum extent.

[0050] Then, the subject exhales forcefully and quickly, expelling all the air from their lungs. During this process, the pulmonary function testing device rapidly and continuously records the volume and flow rate of the exhaled air, thereby obtaining relevant data on forced vital capacity.

[0051] III. Method for testing Forced Expiratory Volume in One Second (FEV1)

[0052] Preparation: Similar to the preparation for the forced vital capacity test.

[0053] Testing process:

[0054] The device displays instructions and visuals on screen 8, instructing the subject to exhale forcefully. During the exhalation test, the instrument focuses on recording the volume of gas exhaled within the first second after the start of exhalation. This volume of air exhaled within this specific time period is the forced expiratory volume in the first second. It precisely captures and analyzes data from the first second during the dynamic process of forced exhalation.

[0055] This lung function testing device is not limited to prompting the above test items, but can also be matched with various items that can be visually prompted by the prompt display 8.

[0056] This pulmonary function testing device is based on the original pulmonary function testing device, with the addition of a leak detection component 6 for detecting air leakage during exhalation, and a prompt display 8 to correctly guide the patient's breathing. It reduces the burden of verbal guidance for doctors during pulmonary function testing and avoids potential verbal errors during manual guidance.

[0057] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of protection claimed by this utility model. The scope of protection of this utility model is defined by the appended claims and their equivalents.

Claims

1. A pulmonary function testing device with auxiliary reminder function, comprising a main unit, a display and a data input device electrically connected to the main unit, and a breathing tube mounted on one side of the main unit via an adjustment bracket, wherein a replaceable mouthpiece is provided at the end of the breathing tube, characterized in that, It also includes a leak detection component and an indicator display electrically connected to the main unit; The air leakage detection component includes a pickup cover, a horn-shaped collection cover, a fixing sleeve, and an array microphone. The pickup cover is a cylindrical cavity with an inner diameter larger than the outer diameter of the mouthpiece. A pickup cavity is formed between the pickup cover and the mouthpiece. One end of the pickup cover facing the patient's mouth is connected to a horn-shaped collection cover for collecting leaking airflow. The other end of the pickup cover is provided with a closed end face. A fixing sleeve for fitting onto the mouthpiece is provided in the middle of the closed end face. An exhaust hole is provided on the closed end face surrounding the fixing sleeve. An array microphone composed of multiple microphones is evenly arranged along the circumference of the inner wall of the pickup cover. The array microphone is electrically connected to the main unit. The notification display is fixed above the breathing tube directly in front of the patient.

2. A pulmonary function testing instrument with auxiliary reminder function according to claim 1, characterized in that, The inner wall of the horn-shaped collection cover is provided with multiple evenly distributed partitions, the ends of which extend into the microphone cover. A microphone and an exhaust port are provided between each pair of adjacent partitions.

3. A pulmonary function testing instrument with auxiliary reminder function according to claim 2, characterized in that, The inner wall of the horn-shaped collection cover is provided with four evenly distributed partitions, and correspondingly, four microphones are arranged to form an array microphone.

4. A pulmonary function testing instrument with auxiliary reminder function according to claim 1, characterized in that, The wires of the array microphone are connected to the display, and the wires of the display and the array microphone are integrated into a single harness inside the display and connected to the host.

5. A pulmonary function testing instrument with auxiliary reminder function according to claim 1, characterized in that, A rubber ring adapted to different mouthpiece outer diameters is provided between the fixing sleeve and the mouthpiece.

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