Nasal calling suite for nitric oxide detector

Abstract

A nose exhalation suite for a nitric oxide detector comprises a nose plug assembly and a silent whistle, the nose plug assembly is communicated with nostrils and the air exhaust end of the nitric oxide detector, the silent whistle is used for exhalation, and the nose plug assembly and the silent whistle are arranged in a split mode or in an integrated mode. The silent whistle comprises a whistle body and a blowing pressure prompting device used for prompting the blowing pressure in the whistle body. The nose plug assembly comprises a nose plug, an air guide pipe and a filter, the nose plug is provided with an air exhaust hole, the air exhaust hole is communicated with the filter through the air guide pipe, and the filter is communicated with the air exhaust end of the nitric oxide detector. Noise troubles can be eliminated by adopting the silent whistle, the blowing pressure of a patient can be confirmed by arranging the blowing pressure prompting device, and the accuracy of nitric oxide content measurement data is ensured.

Description

Technical Field

[0001] The invention relates to the field of nitric oxide detectors, and in particular to a nasal breath kit for nitric oxide detectors. Background Art

[0002] In recent years, nitric oxide detectors have been widely used in the detection of rhinitis or sinusitis. When the nitric oxide detector tests rhinitis or sinusitis, air is drawn from the nose through the nasal plug component, and the chemical sensor inside the nitric oxide detector detects the content of nitric oxide in the nasal cavity, thereby determining whether the patient has rhinitis or sinusitis.

[0003] At present, in order to ensure that the nitric oxide detector only draws out the gas in the patient's nasal cavity during the suction process, the patient is required to whistle during the entire suction process. By whistling, the soft palate is closed and the connection between the nasal cavity and the oral cavity is cut off.

[0004] However, the whistle will make a screaming sound during the whistle blowing, which makes the whole user experience not very good, especially the doctor is annoyed by the screaming sound of the whistle. In addition, since the sound of the patient's whistle varies, it is difficult for the patient and the doctor to completely ensure the isolation of the nasal cavity and the oral cavity by listening to the whistle sound, which leads to inaccurate measurement results.

[0005] Therefore, how to solve the above-mentioned deficiencies in the prior art has become a subject to be studied and solved by the present invention. Summary of the invention

[0006] The purpose of the present invention is to provide a nasal breathing kit for a nitric oxide detector.

[0007] In order to achieve the above object, the technical solution adopted by the present invention is: A nasal exhalation kit for a nitric oxide detector, comprising a nasal plug component connected to a nostril and an air extraction end of the nitric oxide detector and a silent whistle for exhalation, wherein the nasal plug component and the silent whistle are separately or integrally arranged; The silent whistle comprises a whistle body and a blowing pressure indicating device for indicating the blowing pressure in the whistle body; The nasal plug assembly includes a nasal plug, an air duct and a filter. The nasal plug is provided with an air suction hole, which is connected to the filter through the air duct, and the filter is connected to the air suction end of the nitric oxide detector.

[0008] Preferably, the blowing pressure prompting device includes a float, which is arranged at the rear section of the internal airway of the whistle body and moves from the front end to the rear end of the rear section of the internal airway under the action of the blowing pressure, and the whistle body corresponding to the rear end of the internal airway is set to be transparent.

[0009] Preferably, the whistle body is arranged in a tubular shape, and a partition with a vent is arranged in the internal air passage thereof, so as to divide the whistle body into a front sentinel body and a rear sentinel body with air paths communicating with each other, the front sentinel body is arranged horizontally and has a whistle opening at its front end, the rear sentinel body is arranged upwardly inclined and has an air outlet at its rear end, and the rear end of the rear sentinel body is transparent; The float is arranged in the rear sentinel body and moves from the front end to the rear end of the internal air passage of the rear sentinel body under the action of blowing pressure.

[0010] Preferably, the rear sentinel body comprises a rear sentinel body and a whistle cover, the rear sentinel body is integrally formed with the front sentinel body, the whistle cover is transparent and serves as the rear end of the rear sentinel body, the whistle cover is snap-connected with the rear sentinel body, and the air outlet is opened on the cover surface of the whistle cover.

[0011] Preferably, the float is configured to be spherical, the internal airway cross-section of the rear sentinel body is configured to be circular, the diameter of the circular cross-section is larger than the diameter of the float, and the diameter of the float is smaller than the diameters of the air outlet and the vent.

[0012] Preferably, the whistle body is configured as a flat tube.

[0013] Further preferably, the front end of the sentinel body is retracted and extended to form a mouth-holding portion, and the front end edge of the mouth-holding portion radially protrudes to form a circle of protrusions.

[0014] Preferably, the blowing pressure prompting device includes a pressure detection module and an LED light, the probe of the pressure detection module is connected to the internal airway of the whistle body, the LED light is fixed on the whistle body, and the pressure detection module detects the air pressure signal in the whistle body and controls the LED light to provide light prompts based on the air pressure signal.

[0015] Further preferably, a pressurization baffle is provided in the internal air passage of the whistle body, and a pressurization hole communicating with the internal air passage is provided on the pressurization baffle, and the cross-sectional area of ​​the pressurization hole is smaller than the cross-sectional area of ​​the internal air passage.

[0016] Further preferably, the air blowing pressure prompting device also includes a switch and a power supply, the power supply supplies power to the pressure detection module and the LED light, and the switch is connected to a power supply circuit of the power supply.

[0017] Preferably, when the nasal plug assembly and the silent whistle are integrally arranged, the air duct passes through the sentinel body and is fixedly connected to the sentinel body, and the air duct intersects with the internal airway of the sentinel body but is not connected.

[0018] The working principle and advantages of the present invention are as follows: The present invention adopts a silent whistle to eliminate the blowing noise of existing similar products, thereby greatly improving the user experience, and doctors will not be bothered by noise during long-term work; The present invention arranges a float inside the silent whistle, the rear end of the silent whistle is inclined and transparent, and when blowing air, the float overcomes gravity and moves to the rear end high point, and the patient's air outlet pressure can be confirmed by observing the position of the float, ensuring that the nasal cavity and the oral cavity are completely isolated, thereby ensuring the accuracy of the measurement data.

[0019] The present invention can also use the pressure detection module to detect the air pressure signal in the whistle body. When the air pressure signal reaches a certain value, the LED light is controlled to flash to indicate the blowing pressure, which is convenient for doctors and users to judge whether the soft palate is closed. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Attached Figure 1 This is a usage scenario diagram of Example 1 of the present invention; Attached Figure 2 This is an axonometric view of the nasal plug assembly of Example 1 of the present invention; Attached Figure 3 It is a front view of a silent whistle according to Embodiment 1 of the present invention; Attached Figure 4 This is an exploded view of a silent whistle according to Embodiment 1 of the present invention; Attached Figure 5 is a cross-sectional view of a silent whistle according to Embodiment 1 of the present invention; Attached Figure 6 An axonometric view of a silent whistle and a nose plug assembly integrated into one body according to Embodiment 2 of the present invention; Attached Figure 7 An exploded view of a silent whistle and a nose plug assembly integrated into one body according to Embodiment 2 of the present invention; Attached Figure 8 is a cross-sectional view of the connection between the airway tube and the sentinel body according to Embodiment 2 of the present invention; Attached Fig. 9 is a cross-sectional view of a silent whistle according to Embodiment 3 of the present invention; Attached Fig.10 This is a circuit diagram of the blowing pressure prompting device of Example 3 of the present invention.

[0021] In the above attached figure: 1. Nasal plug component; 11. Nasal congestion; 111. Air extraction hole; 12. Tracheal tube; 13. Filter; 2. Silent whistle; 21. Sentinel body; 211. whistle; 212. Oral cavity; 213. bulge; 22. Rear sentinel body; 221. Rear sentinel body; 222. Whistle cover; 2221. Air outlet; 23. Partition; 231. Ventilation holes; 24. Float; 25. Pressure detection module; 26. LED lights; 27. Pressurized bulkhead; 271. Pressure boost hole; SW1.Switch; U1. Power supply; U2. Pressure sensor; U3.Comparator; U4.Reference voltage source; U5. Operational amplifier. DETAILED DESCRIPTION

[0022] The present invention will be further described below in conjunction with the accompanying drawings and embodiments: Embodiment: The present invention will be clearly described below with diagrams and detailed descriptions. After understanding the embodiments of the present invention, any person skilled in the art can make changes and modifications based on the techniques taught by the present invention without departing from the spirit and scope of the present invention.

[0023] The terms used herein are only for describing specific embodiments and are not intended to be limiting of the present invention. Singular forms such as "a", "this", "here", "this" and "the" as used herein also include plural forms.

[0024] As used herein, “connected” or “positioned” may refer to two or more components or devices being in direct physical contact with each other, or being in indirect physical contact with each other, or may refer to two or more components or devices operating or moving with each other.

[0025] The terms “include,” “including,” “have,” etc. used in this document are open-ended terms, meaning including but not limited to.

[0026] The terms used in this document generally have the ordinary meaning of each term used in this field, in the context of the case and in the specific context, unless otherwise noted. Certain terms used to describe the present invention will be discussed below or elsewhere in this specification to provide additional guidance to those skilled in the art in describing the present invention.

[0027] The terms "front", "back", "up", "down", "left", "right", etc. used in this article are all directional terms. In this case, they are only used to illustrate the positional relationship between the various structures, and are not used to limit the protection plan of this case and the specific direction during actual implementation.

[0028] Example 1, see attached Figure 1 A nasal exhalation kit for a nitric oxide detector comprises a nasal plug component 1 connecting the nostrils and the suction end of the nitric oxide detector and a silent whistle 2 for exhalation, wherein the nasal plug component 1 and the silent whistle 2 are separately arranged.

[0029] See attached Figure 2 The nasal plug assembly 1 includes a nasal plug 11, an air duct 12 and a filter 13. The nasal plug 11 is provided with an air suction hole 111, and the air suction hole 111 is connected to the filter 13 through the air duct 12. The filter 13 is connected to the air suction end of the nitric oxide detector.

[0030] Among them, the nasal plug 11 is made of soft material, such as silicone, rubber, etc. When in use, the nasal plug 11 is placed in the patient's nostrils. The soft nasal plug 11 fits tightly with the nostrils to ensure that the nasal plug 11 and the nostrils are reliably sealed around, which also improves the patient's comfort.

[0031] The filter 13 is used to filter gas impurities.

[0032] When the nitric oxide detector tests a patient for rhinitis or sinusitis, air is drawn from the nose through the nasal plug component 1, and the chemical sensor inside the nitric oxide detector detects the content of nitric oxide in the nasal cavity, thereby determining whether the patient suffers from rhinitis or sinusitis.

[0033] In order to ensure that the gas extracted by the nitric oxide detector is completely extracted from the patient's nasal cavity, the patient is required to blow air into the silent whistle 2 through his mouth while the nitric oxide detector is inhaling air to ensure that the patient's soft palate is closed, thereby achieving an ideal detection effect.

[0034] See attached Figure 3-5 The silent whistle 2 includes a whistle body and a blowing pressure indicating device for indicating the blowing pressure in the whistle body.

[0035] In this embodiment, the blowing pressure prompting device includes a float 24, which is arranged at the rear section of the internal airway of the whistle body and moves from the front end to the rear end of the rear section of the internal airway under the action of the blowing pressure. The whistle body corresponding to the rear end of the internal airway is set to be transparent.

[0036] Specifically, the whistle body is configured as an L-shaped tube, and a partition 23 with a vent hole 231 is provided in the internal air passage thereof, dividing the whistle body into a front sentinel body 21 and a rear sentinel body 22 with connected air passages. The front sentinel body 21 is horizontally arranged and has a whistle mouth 211 for blowing at its front end, and the rear sentinel body 22 is tilted upward and has an air outlet 2221 at its rear end, and the rear end of the rear sentinel body 22 is transparent; when whistling, air is blown from the whistle mouth 211 into the internal air passage to generate air pressure, and the gas is finally discharged from the air outlet 2221. The float 24 is arranged in the rear sentinel body 22, and moves from the front end to the rear end of the internal air passage of the rear sentinel body 22 under the action of the air pressure.

[0037] In order to facilitate the assembly of the float 24, to ensure uniform force and smooth movement, the float 24 is set to be spherical, and the internal air passage section of the rear sentinel body 22 is set to be circular, and the diameter of the circular section is larger than the diameter of the float 24. The diameter of the float 24 is smaller than the diameters of the air outlet 2221 and the air vent 231, so that the float 24 can be limited in the rear sentinel body 22.

[0038] Since the whistle body is set in a tubular shape, when air is blown, the gas enters and exits in one direction, and no whistle sound is emitted. This can not only close the soft palate and cut off the connection between the nasal cavity and the oral cavity, but also eliminate the noise generated by whistling during nitric oxide detection.

[0039] The rear sentinel body 22 is tilted upward and has a transparent rear end. Before blowing, the float 24 is located at the front end (i.e., the low point) of the tilted rear sentinel body 22. When blowing, the float 24 is pushed by the blowing pressure and moves to the rear end (i.e., the high point) of the transparent rear sentinel body 22. The position of the float 24 can be used to determine whether the patient's soft palate is effectively closed. This structural design makes it convenient for the patient to observe the position of the float 24.

[0040] In this embodiment, the whistle body is configured in a flat tube shape, which is convenient for oral holding and hand holding, and also ensures that the rear whistle body 22 is vertically upward to facilitate observation of the float 24.

[0041] The front end of the sentinel body 21 is retracted and extended to form a mouthpiece 212, and the front end edge of the mouthpiece 212 radially protrudes to form a circle of protrusions 213, which can provide a suitable mouthpiece position for the patient to whistle and avoid falling off during the exhalation process.

[0042] The rear sentinel body 22 includes a rear sentinel body 221 and a whistle cover 222 . The rear sentinel body 221 is integrally formed with the front sentinel body 21 . The whistle cover 222 is transparent and is snap-connected with the rear sentinel body 221 . The air outlet 2221 is provided on the cover surface of the whistle cover 222 .

[0043] The whistle upper cover 222 is transparent. When the float 24 is blown to the highest point of the rear whistle body 22, that is, inside the transparent whistle upper cover 222, it can be confirmed that the patient's soft palate is closed. On the one hand, the position of the highest point of the whistle upper cover 222 can be used to confirm the closure of the patient's soft palate. On the other hand, the whistle upper cover 222 and the rear whistle body 221 are separately snap-connected, which can be easily processed.

[0044] The whistle upper cover 222 is snap-connected with the rear whistle body 221 through a stop structure, which is convenient for connection and also convenient for cleaning the rear whistle body 221 and the float 24.

[0045] In order to close the patient's soft palate, the patient needs to maintain a certain blowing pressure when blowing. This pressure can be determined by the weight of the float 24, the size of the vent hole 231 on the partition 23 inside the whistle body, the size of the air outlet 2221 on the whistle cover 222, and the moving height of the float 24. Specifically: The greater the weight of the float 24, the greater the pressure required for the float 24 to reach the mobile high position. In this embodiment, the float 24 is made of a stainless steel ball, a ceramic ball, a glass ball or a steel ball with a diameter of 4.5-7mm. The float 24 is made of a material with a higher density so that the blowing pressure of the silent whistle 2 can be well designed.

[0046] The smaller the diameter of the vent hole 231 is, the greater the pressure required for the float 24 to reach the highest moving position. In this embodiment, the diameter of the vent hole 231 may be between 1 and 4 mm.

[0047] The smaller the diameter of the air outlet 2221 is, the greater the pressure required for the float 24 to reach the highest moving position will be. In this embodiment, the diameter of the air outlet 2221 can be between 2-4 mm.

[0048] The higher the mobile high position of the float 24, the greater the pressure required for the float 24 to reach the mobile high position. Among them, the mobile high position of the float 24 can be determined by the inclination angle of the rear sentinel body 22 after the length is determined, or by the length of the rear sentinel body 22 after the inclination angle is determined. When the length of the rear sentinel body 22 is constant, the greater its inclination angle (that is, the smaller the angle between the rear sentinel body 22 and the front sentinel body 21), the higher the mobile high position of the float 24. When the inclination angle of the rear sentinel body 22 is constant, the longer its length, the higher the mobile high position of the float 24. In this embodiment, the length of the rear sentinel body 22 can be between 10-50mm.

[0049] Therefore, by selecting the appropriate weight of the float 24, the size of the vent hole 231 on the partition 23, the size of the air outlet 2221 on the whistle cover 222, and the length of the rear whistle body 22, the blowing pressure required for the float 24 of the silent whistle 2 to reach the high position of the float 24 can be designed, thereby ensuring that the patient's soft palate is effectively closed.

[0050] Example 2, see attached Figure 6-8This embodiment is basically the same as the embodiment 1, except that: in order to facilitate the use of the patient, the nasal plug assembly 1 and the silent whistle 2 are integrally arranged, the air duct 12 passes through and is fixed on the silent whistle 2, and can be specifically integrally formed, and the air duct 12 crosses the internal airway of the silent whistle but is not connected.

[0051] In order to avoid affecting the movement of the float 24 , the air conduit 12 passes through and is fixed on the sentinel body 21 .

[0052] Example 3, see attached Figure 9-10 This embodiment is basically the same as the embodiment 1, except that the blowing pressure prompting device includes a pressure detection module 25, an LED light 26, a switch SW1 and a power supply U1.

[0053] The probe of the pressure detection module 25 is connected to the internal airway of the whistle body, and the pressure detection module 25 is embedded in the inner wall of the sentinel body 21. Fig. 9 In other embodiments, the float 24 may be embedded in the inner wall of the rear sentinel body 221 as long as it does not hinder the movement of the float 24.

[0054] The LED light 26 is arranged on the whistle body. For convenient observation of the light, the LED light 26 can be arranged on the rear whistle body 221. Fig. 9 In other embodiments, it can also be set on the sentinel body 21, and the specific position can be set according to the needs of the patient or doctor for convenient observation.

[0055] To facilitate power supply, switch SW1 and power supply U1 are also installed on the front body 21 or the rear body 221 (not shown in the figure). The power supply U1 supplies power to the pressure detection module 25 and the LED light 26. The switch SW1 is connected to the power supply circuit of the power supply U1, and the power supply U1 adopts a button battery.

[0056] The pressure detection module 25 detects the air pressure signal in the whistle body and controls the LED light 26 for light prompting based on the air pressure signal, and drives the LED light 26 to indicate the blowing pressure, and the pressure represents the blowing flow rate.

[0057] A pressurization baffle 27 is provided in the internal airway of the whistle body, and a pressurization hole 271 connected to the internal airway is provided on the pressurization baffle 27. The cross-sectional area of ​​the pressurization hole 271 is smaller than the cross-sectional area of ​​the internal airway. By providing the pressurization hole 271, the user can exert force when blowing, thereby closing the soft palate and cutting off the connection between the nasal cavity and the oral cavity.

[0058] The blowing pressure prompting device of this embodiment can also be installed in a whistle body of a straight line or other shapes (not shown in the figure).

[0059] In this embodiment, the pressure detection module 25 includes a pressure sensor U2 with an analog output function, a comparator U3, a reference voltage source U4 and an operational amplifier U5. Fig.10 .

[0060] The output end of the pressure sensor U2 is connected to the non-inverting input end of the operational amplifier U5, the output end of the operational amplifier U5 is connected to the non-inverting input end of the comparator U3, the inverting input end of the comparator U3 is connected to the reference voltage source U4, the output end of the comparator U3 is connected to the LED lamp 26, and the switch SW1 is connected to the connection line between the power supply and the pressure sensor.

[0061] When the silent whistle 2 is used, the switch SW1 is turned on, the power supply is turned on, the pressure sensor U2 detects the blowing pressure in the internal airway of the silent whistle 2, and outputs the blowing pressure to the operational amplifier U5 in the form of analog voltage through the VOUT pin. The operational amplifier U5 adjusts the amplification factor of the analog voltage output by the pressure sensor U2, and transmits the amplified analog voltage signal to the non-inverting input terminal of the comparator U3; at the same time, the reference voltage source U4 transmits the reference voltage (pressure threshold) generated by the voltage division to the inverting input terminal of the comparator U3. The comparator U3 compares the reference voltage and the analog voltage. When the analog voltage is greater than the reference voltage, the comparator U3 outputs a high signal to drive the LED lamp 26 to light up. At this time, the blowing pressure meets the requirements.

[0062] In order to ensure that the signal of the pressure sensor U2 is stably and sensitively transmitted to the operational amplifier U5, this embodiment also connects an RC filter circuit to the line connecting the pressure sensor U2 and the operational amplifier U5. The RC filter circuit includes R10 connected in series on the line and capacitor C2 connected in parallel on the line. One end of the capacitor C2 is grounded. This design mainly utilizes capacitor energy storage and filtering.

[0063] In addition, the non-inverting input terminal of the comparator U3 is connected in series with the feedback resistors R8 and R9 and then grounded, and the inverting input terminal of the operational amplifier U5 is connected to the line between the feedback resistors R8 and R9. With this design, the amplification factor of the operational amplifier U5 can be set by the feedback resistors R8 / R9.

[0064] Embodiment 4: This embodiment is basically the same as Embodiment 3, except that: for the convenience of use by patients, the nasal plug assembly 1 and the silent whistle 2 are integrally arranged, the air duct 12 passes through and is fixed on the silent whistle 2, and can be specifically integrally formed, and the air duct 12 intersects with the internal airway of the silent whistle 2 but is not connected (not shown in the figure).

[0065] The above embodiments are only for illustrating the technical concept and features of the present invention, and their purpose is to enable people familiar with the technology to understand the content of the present invention and implement it accordingly, and they cannot be used to limit the protection scope of the present invention. Any equivalent changes or modifications made according to the spirit of the present invention should be included in the protection scope of the present invention.

Claims

1. A nasal breathing kit for a nitric oxide detector, characterized in that: It comprises a nasal plug component connected to the nostril and the suction end of the nitric oxide detector and a silent whistle for exhalation, wherein the nasal plug component and the silent whistle are separately arranged or integrally arranged; The silent whistle comprises a whistle body and a blowing pressure indicating device for indicating the blowing pressure in the whistle body; The nasal plug assembly includes a nasal plug, an air duct and a filter. The nasal plug is provided with an air suction hole, which is connected to the filter through the air duct, and the filter is connected to the air suction end of the nitric oxide detector.

2. A nasal breath kit for a nitric oxide detector according to claim 1, characterized in that: The blowing pressure prompting device includes a float, which is arranged at the rear section of the internal airway of the whistle body and moves from the front end to the rear end of the rear section of the internal airway under the action of the blowing pressure. The whistle body corresponding to the rear end of the internal airway is set to be transparent.

3. A nasal breath kit for a nitric oxide detector according to claim 2, characterized in that: The whistle body is arranged in a tubular shape, and a partition with a vent is arranged in the internal air passage thereof, so as to divide the whistle body into a front sentinel body and a rear sentinel body with air passages communicating with each other, the front sentinel body is arranged horizontally and has a whistle opening at its front end, the rear sentinel body is arranged upwardly inclined and has an air outlet at its rear end, and the rear end of the rear sentinel body is transparent; The float is arranged in the rear sentinel body and moves from the front end to the rear end of the internal air passage of the rear sentinel body under the action of blowing pressure.

4. A nasal breath kit for a nitric oxide detector according to claim 3, characterized in that: The rear sentinel body comprises a rear sentinel body and a whistle upper cover, the rear sentinel body is integrally formed with the front sentinel body, the whistle upper cover is transparent and serves as the rear end of the rear sentinel body, the whistle upper cover is snap-connected with the rear sentinel body, and the air outlet is opened on the cover surface of the whistle upper cover.

5. A nasal breath kit for a nitric oxide detector according to claim 3, characterized in that: The float is set to be spherical, and the internal airway section of the rear sentinel body is set to be circular, the diameter of the circular section is larger than the diameter of the float, and the diameter of the float is smaller than the diameters of the air outlet and the vent.

6. A nasal breath kit for a nitric oxide detector according to claim 3, characterized in that: The whistle body is configured in a flat tube shape.

7. A nasal breath kit for a nitric oxide detector according to claim 3, characterized in that: The front end of the sentinel body is retracted and extended to form a mouth-holding portion, and the front end edge of the mouth-holding portion radially protrudes to form a circle of protrusions.

8. A nasal breath kit for a nitric oxide detector according to claim 1, characterized in that: The blowing pressure prompting device includes a pressure detection module and an LED light, the probe of the pressure detection module is connected to the internal airway of the whistle body, the LED light is fixed on the whistle body, and the pressure detection module detects the air pressure signal in the whistle body and controls the LED light to provide light prompts based on the air pressure signal.

9. A nasal breath kit for a nitric oxide detector according to claim 8, characterized in that: A pressurization partition is arranged in the internal air passage of the whistle body, and a pressurization hole communicating with the internal air passage is arranged on the pressurization partition, and the cross-sectional area of ​​the pressurization hole is smaller than the cross-sectional area of ​​the internal air passage.

10. A nasal breath kit for a nitric oxide detector according to claim 8, characterized in that: The blowing pressure prompting device also includes a switch and a power supply, the power supply supplies power to the pressure detection module and the LED light, and the switch is connected to the power supply circuit of the power supply.

11. A nasal breath kit for a nitric oxide detector according to claim 1, characterized in that: When the nasal plug assembly and the silent whistle are integrally arranged, the air conduit penetrates through and is fixed on the silent whistle, and the air conduit crosses but is not connected with the internal airway of the silent whistle.

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