CN110755096A - Nasal resistance testing device and method - Google Patents

Abstract

The invention discloses a nasal resistance testing device and method, and relates to the technical field of medical equipment. The air path connection device is respectively connected with the respiratory flow detection device and the pressure detection device, and the pressure detection device is connected with the data processing device for detecting the nasal ventilation when the human body is breathing. The bilateral nasal resistance can be measured by placing the snorkel C in the patient's mouth and breathing through the nose; the nasal resistance of the other nasal cavity can be measured by placing the snorkel C in the patient's mouth and blocking one of the nasal cavities with a nasal plug; The ventilation tube C is connected to the ventilation nasal plug and placed in one of the nasal cavities, and the patient's mouth is closed to measure the nasal resistance of the other nasal cavity. The pressure sensor measures the pressure difference between the front and rear nasal cavity, the pressure difference between the two sides of the respiratory flow sensor, the respiratory flow sensor measures the respiratory flow value, and uses the relevant airway resistance algorithm to obtain the nasal resistance. The invention has simple structure, convenient use, few consumables, Easy to sterilize.

Description

A kind of nasal resistance testing device and method

technical field

The invention relates to the technical field of medical equipment, in particular to a device for testing nasal resistance, and in particular to a nasal resistance testing device and method.

Background technique

At present, most of the preoperative evaluation of patients relies on the clinical experience of rhinologists and lacks objective basis. The understanding of nasal diseases by rhinoscopy, endoscopy, laryngoscopy and imaging examinations is mainly reflected in morphological observation. There are few assessments of ventilation function. On the other hand, rhinoscopy, endoscopy, laryngoscopy and imaging examinations are expensive, and the radiation is large. Patients and their families have some scruples, which cannot be afforded economically, and it is difficult to effectively and objectively It reflects the degree and nature of the patient's nasal obstruction, lacks effective evaluation indicators in the treatment effect and postoperative evaluation, and sometimes there is a difference between the patient's subjective feeling of nasal ventilation and the actual nasal resistance, so it is easy to cause medical conflicts and disputes. The ventilation resistance detection device objectively reflects the degree of nasal obstruction and has the function of comparing preoperative and postoperative curative effects, and objectively reflects the surgical effect.

Therefore, it is urgent to develop a nasal resistance test method and device with simple detection, reliable data and suitable for all age groups.

SUMMARY OF THE INVENTION

(1) Technical problems solved

The purpose of the present invention is to provide a nasal resistance testing device and method with simple detection, reliable data and suitable for all age groups.

(2) Technical solutions

For achieving the above object, the present invention provides following technical scheme: a kind of nasal resistance testing device, it comprises air circuit connection device, respiratory flow detection device, pressure detection device and data processing device, and air circuit connection device is respectively connected with respiratory flow detection device and The pressure detection device is connected, the pressure detection device is connected with the data processing device, the air path connection device includes a mask, A pipeline, B pipeline, C pipeline and a ventilation tube, the respiratory flow detection device includes a respiratory flow sensor, and the pressure detection device The device includes a pressure sensor 1 and a pressure sensor 2, the ventilation tube is communicated with the mask, and a breathing flow sensor is installed on the ventilation tube, and the breathing flow sensor is used to detect gas flow; One end of the respiratory flow sensor is far away from the mask, and the other end of the first pressure sensor is connected to the end of the respiratory flow sensor close to the mask through the B pipeline, which is used to detect the pressure difference on both sides of the respiratory flow sensor; one end of the second pressure sensor is connected through the B pipeline. To the end of the respiratory flow sensor close to the mask, the other end of the pressure sensor 2 is connected to the C pipeline, which is used to detect the pressure difference between the front and rear nasal cavity; the data processing device is respectively connected with the pressure sensor 1 and the pressure sensor 2, using the relevant airway resistance algorithm. Get nasal resistance.

Further, one end of the C pipeline is connected to the second pressure sensor, and the other end of the C pipeline is inserted from the lower end of the mask and extends to the inner surface of the mask.

Further, the data processing device includes an amplifier, an A/D converter, and a computer, and the amplifier, the A/D converter, and the computer are electrically connected in sequence.

The present invention also provides a nasal resistance test method:

When measuring the nasal resistance of the patient's bilateral nasal cavity, by placing the C pipeline in the patient's mouth, the patient's mouth is closed and there is no gas flow in the oral cavity, and the pressure in the oral cavity is equal to the pressure in the posterior nasal cavity. The human body collects the gas generated by the bilateral nasal cavity during the breathing process, and the snorkel delivers the collected gas to the respiratory flow sensor, and the respiratory flow sensor generates a pressure difference. The pressure difference of the gas on both sides of the sensor can be used to obtain the gas flow rate value in the nasal cavity. For the gas transported through the B pipeline and the C pipeline, the pressure sensor 2 measures the pressure value of the front and rear nasal cavity, and uses the relevant airway resistance algorithm to obtain the nasal resistance;

When measuring the nasal resistance of the patient's unilateral nasal cavity, block one of the nasal cavities with a nasal plug. By placing the C pipeline in the patient's mouth, the patient's mouth is closed and there is no gas flow in the oral cavity. 2. Obtain the posterior nasal cavity pressure, or place the C pipeline connected to the ventilation nasal plug in one of the nasal cavities. At this time, the patient's mouth needs to be closed, and the nasal cavity and the posterior nasal cavity are connected, so that the pressure sensor connected to the C pipeline 2 obtains the posterior nasal cavity pressure, and the mask will The gas generated by the unilateral nasal cavity of the human body is collected during the breathing process, and the snorkel delivers the collected gas to the respiratory flow sensor, and the respiratory flow sensor generates a pressure difference. The pressure difference of the gas on both sides of the sensor can be used to obtain the gas flow velocity value in the unilateral nasal cavity. For the gas transported through the B pipeline and the C pipeline, the pressure sensor 2 measures the pressure value of the front and rear nasal cavity, and uses the relevant airway resistance algorithm to obtain the nasal resistance. .

(3) Beneficial effects

Compared with the prior art, after adopting the above-mentioned technical scheme, the beneficial effects of the present invention are:

1. It solves the problem of the cumbersome process of bilateral nasal resistance testing. Patients can be tested directly by wearing a mask, without risk, the testing process is simple, and the testing time is short, saving materials.

2. Solve the problem of unilateral nasal resistance test, and provide a variety of solutions, the test cost is reduced, and the test can be detected in real time, the test data is reliable and stable, and it is suitable for the general public.

Description of drawings

1 is a schematic structural diagram of an embodiment provided by the present invention;

Fig. 2 is the nasal resistance R and the time t curve diagram of the embodiment provided by the present invention;

Description of reference numbers:

1. Mask; 2. Respiratory flow sensor; 3. A pipeline; 4. B pipeline; 5. C pipeline; 6. Pressure sensor 1; 7. Pressure sensor 2; 8. Data processing device;

Detailed ways

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, but not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

Please refer to FIG. 1-FIG. 2, an embodiment provided by the present invention: a nasal resistance test device, which includes an air circuit connection device, a respiratory flow detection device, a pressure detection device and a data processing device 8, and the air circuit connection device is respectively It is connected with the respiratory flow detection device and the pressure detection device, and the pressure detection device is connected with the data processing device 8. The data processing device 8 includes an amplifier, an A/D converter, and a computer, and the amplifier, the A/D converter, and the computer are electrically connected in sequence. connection; the air path connection device includes a mask 1, A pipeline 3, B pipeline 4, C pipeline 5 and a ventilation tube 9, the respiratory flow detection device includes a respiratory flow sensor 2, and the pressure detection device includes a pressure sensor 6 With the pressure sensor 2 7, the breather tube 9 is communicated with the mask 1, and the breather flow sensor 2 is installed on the breather tube 9, and the breath flow sensor 2 is used to detect the gas flow; one end of the pressure sensor 1 6 passes through the A pipeline 3 is connected to the end of the respiratory flow sensor 2 away from the mask 1, and the other end of the pressure sensor one 6 is connected to the end of the respiratory flow sensor 2 close to the mask 1 through the B pipeline 4, for detecting the pressure difference on both sides of the respiratory flow sensor; the One end of the pressure sensor 2 7 is connected to the end of the respiratory flow sensor 2 close to the mask 1 through the B pipeline 4, and the other end of the pressure sensor 2 7 is connected to the C pipeline 5 (placed in the oral cavity or nasal cavity), which is used to detect the pressure difference between the front and rear nasal cavity. A pipeline 3 obtains the gas at the back end of the respiratory flow sensor 2 and transmits it to the pressure sensor one 6, and the B pipeline 4 obtains the front end gas of the respiratory flow sensor 2 (also the gas exhaled from the front nasal cavity) and transmits it to the pressure sensor one 6 and the pressure sensor two 7 respectively, After the C pipeline 5 is acquired, the nasal cavity gas is transmitted to the second pressure sensor 7; the data processing device 8 is respectively connected with the pressure sensor one 6 and the pressure sensor two 7, and uses the relevant airway resistance algorithm to obtain the nasal resistance. One end of the C pipeline 5 is connected to the second pressure sensor 7 , and the other end of the C pipeline 5 is inserted from the lower end of the mask 1 and extends to the inner surface of the mask 1 .

The present embodiment also provides a nasal resistance testing method, including the detection of bilateral nasal resistance devices and the detection of unilateral nasal resistance devices,

1. Use the orifice throttling method to measure the flow, and the relationship between the flow V and the differential pressure P is:

Among them: μ is the flow coefficient

A is the cross-sectional area of the opening

g is the acceleration of gravity

P is the pressure difference on both sides of the throttling device

2. The nasal resistance is determined by the ratio of the anterior and posterior nasal pressure difference ΔP to the nasal respiratory flow V, namely:

R=ΔP/V

Where: ΔP=|P1-P2|

P1 indicates anterior nasal pressure

P2 means posterior nasal pressure

V is the nasal breathing flow

(1) When measuring the nasal resistance of the patient's bilateral nasal cavity:

(1) Before the nasal resistance test device works, the patient needs to sit still for 15 minutes and then perform a standard measurement. During the measurement process, the patient can only breathe through the nose;

(2) Put the C pipeline 5 in the patient's mouth and close the mouth, and wear the mask 1, and do auxiliary work such as disinfection inspection, and the nasal resistance test device starts to work at the same time;

可以得到鼻腔内流速V，患者嘴巴闭合口腔内没有气体流动，口腔内压力等于后鼻腔压力，通过B管道4、C管道5输送的气体，压力传感器二7来测出前鼻腔压力P1和后鼻腔压力P2；(3) The mask 1 collects the gas generated by the nasal cavity on both sides of the human body during the breathing process, and the ventilation tube 9 is transported to the respiratory flow sensor 2, and the gas transported through the A pipeline 3 and the B pipeline 4, and the pressure sensor 6 measures the gas pressure on both sides of the respiratory flow sensor. difference P, using the formula

The flow velocity V in the nasal cavity can be obtained, the patient's mouth is closed and there is no gas flow in the oral cavity, the pressure in the oral cavity is equal to the pressure in the posterior nasal cavity, the gas delivered through the B pipeline 4 and the C pipeline 5, the pressure sensor 27 measures the front nasal cavity pressure P1 and the posterior nasal cavity pressure P1 pressure P2;

(4) According to the obtained nasal cavity pressure P1 and posterior nasal cavity pressure P2, using ΔP=|P1-P2|, the front and rear nasal cavity pressure difference ΔP can be obtained;

(5) According to the obtained flow velocity V in the nasal cavity and the pressure difference ΔP between the front and rear nasal cavity, the total nasal resistance R can be obtained by using the formula R=ΔP/V, and the nasal ventilation of the patient can be judged by the R-t curve.

(2) When measuring the nasal resistance of the patient's unilateral nasal cavity:

(a) Before the nasal resistance test device works, the patient needs to sit still for 15 minutes and then perform a standard measurement. During the measurement, the patient can only breathe through unilateral nasal cavity;

(b) The patient needs to plug one of the nasal cavities with a nasal plug and place the C-channel 5 in the patient's mouth to close the mouth, wear the mask 1, and perform auxiliary work such as disinfection and inspection, and the nasal resistance test device starts to work;

得到单侧鼻腔内流速V，患者嘴巴闭合口腔内没有气体流动，口腔内压力等于后鼻腔压力，通过B管道4、C管道5输送的气体，压力传感器二7来测出前鼻腔压力P1和后鼻腔压力P2；(c) The mask 1 collects the gas generated by the unilateral nasal cavity of the human body during the breathing process, and is transported to the respiratory flow sensor 2 through the ventilation tube 9, and the gas transported by the A pipeline 3 and the B pipeline 4, and the pressure sensor 6 measures the two sides of the respiratory flow sensor 2. Gas pressure difference P, using the formula

The flow velocity V in the unilateral nasal cavity is obtained, the patient's mouth is closed and there is no gas flow in the oral cavity, and the pressure in the oral cavity is equal to the pressure in the posterior nasal cavity. Nasal pressure P2;

(d) According to the obtained nasal cavity pressure P1 and posterior nasal cavity pressure P2, using ΔP=|P1-P2|, the front and rear nasal cavity pressure difference ΔP can be obtained;

(e) According to the obtained nasal flow velocity V and the front and rear nasal pressure difference ΔP, the total nasal resistance R can be obtained by using the formula R=ΔP/V, and the unilateral nasal ventilation of the patient can be judged by the R-t curve diagram, and the other side The nasal cavity test method can be obtained in the same way.

To sum up, the present embodiment has a simple structure, is convenient to use, has few consumables, and is easy to sterilize.

It will be apparent to those skilled in the art that the present invention is not limited to the details of the above-described exemplary embodiments, but that the present invention may be embodied in other specific forms without departing from the spirit or essential characteristics of the invention. Therefore, the embodiments are to be regarded in all respects as illustrative and not restrictive, and the scope of the invention is to be defined by the appended claims rather than the foregoing description, which are therefore intended to fall within the scope of the claims. All changes within the meaning and scope of the equivalents of , are included in the present invention.

In addition, it should be understood that although this specification is described in terms of embodiments, not each embodiment only includes an independent technical solution, and this description in the specification is only for the sake of clarity, and those skilled in the art should take the specification as a whole , the technical solutions in each embodiment can also be appropriately combined to form other implementations that can be understood by those skilled in the art.

Claims (7)

1. A nasal resistance testing device comprises a gas circuit connecting device, a respiratory flow detecting device, a pressure detecting device and a data processing device, wherein the gas circuit connecting device is respectively connected with the respiratory flow detecting device and the pressure detecting device; one end of the first pressure sensor is connected to one end, far away from the mask, of the respiratory flow sensor through a pipeline A, and the other end of the first pressure sensor is connected to one end, close to the mask, of the respiratory flow sensor through a pipeline B; one end of the second pressure sensor is connected to one end, close to the mask, of the respiratory flow sensor through a pipeline B, and the other end of the second pressure sensor is connected with a pipeline C; and the data processing device is respectively connected with the first pressure sensor and the second pressure sensor.

2. The nasal resistance testing device according to claim 1, wherein one end of the C-channel is connected to the second pressure sensor, and the other end of the C-channel is inserted from the lower end of the mask and extends to the inner face of the mask.

3. A nasal resistance testing device according to claim 1, wherein the data processing device comprises an amplifier, an a/D converter and a computer, and the amplifier, the a/D converter and the computer are electrically connected in sequence.

4. A nasal resistance test method is characterized in that,

when the nasal resistance of the nasal cavities at the two sides of a patient is measured, the pipeline C is placed in the mouth of the patient, the mouth of the patient is closed, no gas flows in the oral cavity, the pressure in the oral cavity is equal to the pressure of the rear nasal cavity, so that the pressure sensor II connected with the pipeline C obtains the pressure of the rear nasal cavity, the mask collects the gas generated by the nasal cavities at the two sides of the human body in the breathing process, the vent pipe conveys the collected gas to the breathing flow sensor, the breathing flow sensor generates pressure difference, the pressure sensor I measures the pressure difference of the gas at the two sides of the breathing flow sensor through the gas conveyed by the pipeline A and the pipeline B, so that the gas flow rate value in the nasal cavities is obtained, the gas conveyed by the pipeline B and the pipeline C, the pressure sensor;

when surveying patient unilateral nasal cavity nasal resistance, plug one of them nasal cavity with the nasal obstruction, through putting the C pipeline in the patient mouth, there is not gaseous flow in patient's mouth closed oral cavity, oral cavity internal pressure equals back nasal cavity pressure, thereby the second pressure sensor of C pipe connection acquires back nasal cavity pressure, the face guard is collected the gas that the human body produced at breathing process unilateral nasal cavity, the breather pipe carries the gas of collecting to breathe flow sensor, produce the pressure differential by breathing flow sensor, through A pipeline, the gas of B pipe transport, pressure sensor one surveys the pressure differential of breathing flow sensor both sides gas, thereby reach unilateral nasal cavity gas velocity of flow value, through B pipeline, the gas of C pipe transport, pressure sensor two survey the pressure value of preceding, back nasal cavity, utilize relevant respiratory resistance algorithm to reach the nasal resistance.

5. The nasal resistance testing method according to claim 4, wherein the method of obtaining the posterior nasal cavity pressure is replaced by: the C pipeline is connected with the ventilation nasal plug and is placed in one nasal cavity, at the moment, the mouth of a patient needs to be closed, the nasal cavity is communicated with the rear nasal cavity, and therefore the pressure sensor II connected with the C pipeline obtains the pressure of the rear nasal cavity.

6. The nasal resistance test method according to claim 4, wherein when measuring bilateral nasal resistance of the patient:

(1) before the nasal resistance testing device works, a patient needs to sit still for 15min and then carries out standard measurement, and the patient can only breathe through the nose in the measurement process;

(2) placing the pipeline C in the mouth of a patient, closing the mouth, wearing a mask, doing auxiliary work, and starting the nasal resistance testing device to work;

(3) the mask collects gas generated by nasal cavities at two sides in the respiratory process of a human body, the gas is conveyed to the respiratory flow sensor through the vent pipe, the gas conveyed through the pipeline A and the pipeline B is measured by the pressure sensor, and the gas pressure difference P at two sides of the respiratory flow sensor is measured by using a formula

Obtaining the flow velocity V in the nasal cavity, closing the mouth of the patient, wherein no gas flows in the oral cavity, the pressure in the oral cavity is equal to the pressure of the rear nasal cavity, and measuring the pressure P1 of the front nasal cavity and the pressure P2 of the rear nasal cavity through the gas conveyed by the pipeline B and the pipeline C by the pressure sensor II;

(4) obtaining the front-back nasal cavity pressure difference deltaP by using deltaP (absolute | P1-P2) according to the obtained nasal cavity pressure P1 and the back nasal cavity pressure P2;

(5) and (3) obtaining total nasal resistance R according to the obtained flow velocity V in the nasal cavity and the pressure difference delta P between the front nasal cavity and the rear nasal cavity by using a formula R which is delta P/V, and judging the nasal ventilation condition of the patient through an R-t curve graph.

7. The nasal resistance test method of claim 4, wherein when measuring the nasal resistance of a single nasal cavity of a patient:

(a) before the nasal resistance testing device works, a patient needs to sit still for 15min and then carries out standard measurement, and the patient can only breathe by using a single nasal cavity in the measurement process;

(b) a patient needs to plug one nasal cavity by using the nasal plug, put the C pipeline in the mouth of the patient, close the mouth, wear the mask, do auxiliary work and start the nasal resistance testing device to work;

(c) the mask collects gas generated by single nasal cavity in the respiratory process of human body, the gas is conveyed to the respiratory flow sensor through the vent pipe, the gas is conveyed through the pipeline A and the pipeline B, the gas pressure difference P at two sides of the respiratory flow sensor is measured by the pressure sensor, and the formula is utilized

Obtaining the flow velocity V in the nasal cavity at one side, wherein no gas flows in the closed mouth of the patient, the pressure in the oral cavity is equal to the pressure in the rear nasal cavity, and the pressure in the front nasal cavity P1 and the pressure in the rear nasal cavity P2 are measured by the gas conveyed by the pipeline B and the pipeline C and the pressure sensor II;

(d) obtaining the front-back nasal cavity pressure difference deltaP by using deltaP (absolute | P1-P2) according to the obtained nasal cavity pressure P1 and the back nasal cavity pressure P2;

(e) and obtaining total nasal resistance R by using a formula R ═ delta P/V according to the obtained flow velocity V in the nasal cavity and the pressure difference delta P between the front nasal cavity and the rear nasal cavity, judging the ventilation condition of the nose on one side of the patient through an R-t curve graph, and obtaining the nasal cavity test method on the other side in the same way.

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