WO2020252748A1

WO2020252748A1 - Ventilator intubation tube and using method

Info

Publication number: WO2020252748A1
Application number: PCT/CN2019/092115
Authority: WO
Inventors: 李秋华; 罗小锁; 李增; 彭强
Original assignee: 深圳市科曼医疗设备有限公司
Priority date: 2019-06-20
Filing date: 2019-06-20
Publication date: 2020-12-24

Abstract

A ventilator intubation tube and a using method. The ventilator intubation tube comprises an intubation tube body (1) used in conjunction with a ventilator; the intubation tube body (1) comprises an upper hose (11) and a lower hose (12) which are integrally connected, the top end of the upper hose (11) is connected to an air source connector (2), and an air bag (3) sealingly connected to the lower hose (12) is provided at the outer wall position below the lower hose (12); a pressure tube (4) fixedly connected to the inner wall of one side of the intubation tube body (1) is provided in the intubation tube body (1), one end of the pressure tube (4) is located at the tail end of the lower hose (12), the other end of the pressure tube (4) extends to the outer portion of the upper hose (11) and is provided with a pressure sensor connector (41), and the pressure sensor connector (41) is used for connecting a pressure sensor of the ventilator. The ventilator intubation tube is simple in design and reasonable in structure, and an automatic intubation resistance compensation mode is replaced; the pressure in the lung of a patient is more accurately and stably controlled so as to obtain a better treatment effect of the ventilator.

Description

Intubation of ventilator and method of use

Technical field

The invention belongs to the technical field of ventilator matching equipment, and in particular relates to a ventilator intubation and a use method.

Background technique

In modern clinical medicine, the ventilator, as an effective means to artificially replace the autonomous ventilation function, has been commonly used in various reasons for respiratory failure, anesthesia breathing management during major operations, respiratory support treatment and emergency recovery. The intubation used with the ventilator is used to insert into the patient’s trachea to assist the patient in breathing and to estimate the patient’s lung pressure. The corresponding tracheal intubation is also an important rescue technique in emergency work, which has become cardiopulmonary resuscitation and accompanied by breathing. An important measure in the rescue of patients with dysfunction in critically ill patients is one of the most widely used, quickest, and most effective means in respiratory management. It plays an important role in rescuing the lives of patients and reducing the mortality rate. The role of.

technical problem

Under this premise, in the automatic intubation resistance compensation (ATC) process of pressure-controlled ventilation of the ventilator, the prior art uses ordinary intubation with balloons to estimate the patient's flow, that is, by multiplying by the intubation coefficient. Calculate the pressure difference between the front end and the end of the cannula to estimate the pressure in the patient’s lungs. There is a large estimation error. The error of the estimation method itself causes the pressure estimation and control error in the ATC process to be uncontrollable, and the pressure value is not The precise question.

Technical solutions

A respirator cannula includes a cannula main body that is used in conjunction with a ventilator, and is characterized in that the cannula main body includes an upper hose and a lower hose that are integrally connected, the top of the upper hose is connected with an air source connector, and the lower part is soft. The outer wall below the tube is provided with an air bag that is sealed and connected with the lower hose. The main body of the cannula is provided with a pressure pipe fixedly connected to the inner wall of the main body of the cannula. One end of the pressure pipe is located at the end of the lower hose, and the other One end extends to the outside of the upper hose and is provided with a pressure sensor connector, which is used to connect with the pressure sensor of the ventilator.

A method for using intubation of a ventilator is characterized in that it comprises:

Coat the surface of the lower hose with anesthetic and lubricant;

Insert the lower hose into the patient’s trachea;

Inflate the airbag and make the airbag stuck in the patient's trachea;

Connect the pressure sensor connector and the air source connector to the ventilator to control intrapulmonary pressure ventilation;

Obtain the patient's lung pressure through the pressure sensor on the ventilator;

Transmit the pressure value obtained by the pressure sensor to the ventilator and compare it with the threshold set by the comparator in the ventilator;

Output the comparison result of the comparator to the lung pressure control module;

The intrapulmonary pressure control module controls the ventilator to perform intrapulmonary pressure control ventilation.

Beneficial effect

The present invention penetrates into the patient’s trachea through the intubation body composed of an upper hose and a lower hose, and fixes the intubation body by an airbag provided at the outer wall below the lower hose to prevent the patient’s trachea and the intubation body from being sealed The accident caused by gastric juice backflow into the intake tube, where a pressure tube is provided on the inner wall of the main body of the cannula. One end of the pressure tube is located at the end of the lower hose and is used to obtain the patient’s lung pressure data. The other end of the tube extends to the outside of the upper hose and is provided with a pressure sensor connector, which is connected to the pressure sensor of the ventilator, so that the ventilator can control intrapulmonary pressure ventilation according to the acquired patient’s lung pressure data. , Can effectively avoid the error caused by the intubation compensation algorithm, so that the pressure sensor of the ventilator can directly obtain the pressure in the patient's lung, and use the pressure data to control the pressure in the lung, instead of the automatic intubation resistance compensation method, which is different from The traditional estimation method makes the measurement data more accurate and obtains a better ventilator treatment effect.

Description of the drawings

Figure 1 is a schematic diagram of the overall structure of a ventilator cannula provided by this embodiment;

[0016 FIG. 2 is a schematic diagram of the overall structure of a pressure catheter for a ventilator intubation provided by this embodiment;

Figure 3 is a flow chart of a method for using a ventilator intubation provided by this embodiment;

Fig. 4 is a frame diagram of a ventilator provided in this embodiment.

Reference signs: 1. Intubation body; 11, upper hose; 12, lower hose; 2. air supply connector; 3. air bag; 4. pressure tube; 41, pressure sensor connector; 42, one-way valve; 43 1. Anti-clogging tube; 431. Sampling through hole; 5. Balloon catheter; 51. Inflation interface; 52. One-way inflation valve; 6. Scale line.

The best mode of the invention

The present invention is further provided as follows: the cannula body is also provided with a balloon catheter fixedly connected to the inner wall of the other side of the cannula body, one end of the balloon catheter is hermetically connected with the balloon, and the other of the balloon catheter One end extends to the outside of the upper hose and is fixedly connected with an inflation interface for inflating the airbag.

The present invention is further configured as: a one-way inflation valve is provided in the inflation interface, and two ends of the one-way inflation valve are respectively connected with the balloon catheter and the inflation interface.

The present invention is further provided that: the outer tube wall of the lower hose is marked with a graduation line.

The present invention is further provided as follows: one end of the pressure conduit is provided with a plurality of anti-clogging pipes, the plurality of the anti-clogging pipes are fixedly connected with the pressure pipe, and a sampling through hole is opened at the end of the anti-clogging pipe away from the pressure pipe .

The present invention is further provided as follows: a one-way valve is arranged in the pressure sensor connector, and two ends of the one-way valve are respectively connected with the pressure pipe and the pressure sensor connector.

The present invention is further configured that: the pressure sensor, the comparator, and the intrapulmonary pressure control module are all arranged inside the ventilator and electrically connected to the ventilator.

The present invention is further configured as follows: the thickness of the lubricant coated on the surface of the lower hose is 0.1mm-1mm.

The present invention is further provided that: the pressure sensor is a differential pressure sensor.

Embodiments of the invention

According to the first aspect, an embodiment of the present invention provides a ventilator cannula, please refer to Figures 1 and 2. Figure 1 is a schematic diagram of the overall structure of a ventilator cannula provided in this embodiment, and Figure 2 is this embodiment The example provides a schematic diagram of the overall structure of a pressure catheter of a ventilator cannula. The ventilator cannula disclosed in the present invention includes a cannula main body 1 used in conjunction with the ventilator, and the cannula main body 1 includes an integrally connected upper hose 11 and the lower hose 12, wherein the top end of the upper hose 11 is connected with an air supply connector 2, and the outer wall below the lower hose 12 is provided with an air bag 3 that is sealed and connected with the lower hose 12, and the intubation body 1 is provided with One end of the pressure pipe 4 is fixedly connected to the inner wall of the cannula body 1 at the end of the lower hose 12, and the other end of the pressure pipe 4 extends to the outside of the upper hose 12 and is provided with a pressure sensor connector 41.

Among them, the air source connector 2 and the upper hose 11 can be connected by threaded or interference connection. The purpose is to facilitate the replacement of the air source connector 2 to fit the ventilator and enhance the practicability of the ventilator intubation.

In the specific implementation process, the pressure tube 4 provided in the main body 1 of the intubation tube facilitates the access of the intubation tube of the ventilator to prevent damage to the equipment. The airbag 3 provided below the lower tube 12 is used to penetrate the lower tube 12 When the patient’s trachea is fixed, the lower tube 12 is sealed and connected to the lower tube 12 to prevent the patient’s gastric juice from infiltrating due to the lack of tightness of the ventilator intubation. One end of the pressure tube 4 extends to the end of the lower tube 12 It is used to directly sample the pressure in the patient's lungs, and the pressure sensor connector 41 provided at the other end is convenient for connecting the pressure tube 4 with the pressure sensor of the ventilator, and is used to transmit the pressure in the patient's lungs and provide feedback parameters for the ventilator.

It should be noted that the upper hose 11 is flexible and can be extended to a certain length, so as to satisfy that the air source connector 2 connected to the top of the upper hose 11 can be connected to the ventilator under different usage environments.

As shown in Figure 1, the outer tube wall of the lower tube 12 is marked with a scale line 6, which clarifies the progress of the lower tube 12 into the patient’s trachea through the scale line 6, preventing accidental injury to the patient’s internal organs and improving the insertion of the ventilator. The safety of the tube.

In the specific implementation process, the cannula body 1 is also provided with a balloon catheter 5 fixedly connected to the inner wall of the other side of the cannula body 1. One end of the balloon catheter 5 is sealed to the balloon 3, and the other end of the balloon catheter 5 extends to the upper part. The outside of the hose 11 is fixedly connected with an inflation port 51 for inflating the airbag 3, that is, after the lower hose 12 penetrates into the patient’s trachea, the ventilator is connected through the inflation port 51 and the ventilator enters the airbag 3 through the balloon catheter 5 The air is blown in to expand and inflate the airbag 3 into the patient's trachea, achieving the purpose of fixing the lower hose 12.

It should be noted that a one-way inflation valve 52 is provided in the inflation interface 51, and both ends of the one-way inflation valve 52 are respectively connected to the balloon catheter 5 and the inflation interface 51, that is, the air can only flow into the airbag 3 along the inflation interface 51 In this way, it is ensured that during the process of inflating the airbag 3 or when the airbag 3 is in an inflated state, the air will not flow backward from the airbag 3 to the ventilator, which improves the safety and practicability of the intubation of the ventilator.

As shown in Figures 1 and 2, a plurality of anti-clogging tubes 43 are provided at one end of the pressure conduit 4, and the plurality of anti-clogging tubes 43 are fixedly connected to the pressure conduit 4, and a sampling through hole 431 is opened at the end of the anti-clogging tube 43 away from the pressure conduit 4 By this arrangement, the problem of inaccurate sampling of the pressure catheter 4 due to the obstruction of the sampling end of the pressure catheter 4 by the patient’s secretions can be prevented. That is, multiple anti-clogging tubes 43 with sampling through holes 431 are designed to overcome the problem of the pressure catheter 4 Blockage problem improves the practicability of ventilator intubation.

In a specific implementation process, the number of the anti-clogging tube 43 can be four, and the anti-clogging tube 43 is also fixedly connected to the inner wall of the lower hose 12 to improve the sampling accuracy of the pressure tube 4.

It should be noted that the pressure sensor connector 41 is provided with a one-way valve 42, and two ends of the one-way valve 42 are respectively connected to the pressure pipe 4 and the pressure sensor connector 41.

According to the second aspect, an embodiment of the present invention provides a method for using a ventilator intubation. Please refer to Figures 3 and 4, which includes the following steps:

[0039 Step S100, coating anesthetic and lubricant on the surface of the lower hose;

Step S200, insert the lower hose into the patient's trachea;

Step S300, inflate the airbag and make the airbag jam in the patient's trachea;

Step S400, connecting the pressure sensor connector and the air source connector to the ventilator to perform intrapulmonary pressure ventilation control;

In step S500, the pressure in the lung of the patient is measured by the pressure sensor on the ventilator;

In step S600, the pressure value obtained by the pressure sensor is transmitted to the ventilator and compared with the threshold set by the comparator in the ventilator;

Step S700, output the comparison result of the comparator to the lung pressure control module;

In step S800, the intrapulmonary pressure control module controls the ventilator to perform intrapulmonary pressure control ventilation.

Further, the pressure sensor, the comparator, and the lung pressure control module are all arranged inside the ventilator and electrically connected to the ventilator.

Further, the pressure sensor is a differential pressure sensor.

Among them, the purpose of the present invention is to directly detect the pressure in the patient's lungs for control during the pressure control ventilation automatic intubation resistance compensation (ATC) process of the ventilator, that is, the pressure sensor is also called the ATC pressure sensor.

Further, the thickness of the lubricant coated on the surface of the lower hose is 0.1mm-1mm.

In summary, the present invention has the following beneficial effects: the present invention is fixedly connected to the inner wall of one side of the cannula main body 1 composed of the upper hose 11 and the lower hose 12 with a pressure tube 4, and one end of the pressure tube 4 is located in the lower part of the soft tube. The end of the tube 12 is provided with a plurality of anti-clogging tubes 43, and a sampling through hole 431 is opened at the end of the anti-clogging tube 43 facing away from the pressure conduit 4. This design can effectively avoid errors caused by the prior art intubation compensation algorithm, so that The pressure sensor of the ventilator can directly obtain the patient's lung pressure, and use the pressure data to control the lung pressure, replacing the automatic intubation resistance compensation method, which is different from the traditional estimation method, making the measurement data more accurate and obtaining better results. Good ventilator treatment effect.

Industrial applicability

This application has industrial applicability.

Claims

A respirator cannula, comprising a cannula main body used in conjunction with a ventilator, characterized in that: the cannula main body comprises an upper hose and a lower hose that are integrally connected, and the top end of the upper hose is connected with an air source The outer wall below the lower hose is provided with an air bag sealed and connected with the lower hose, and the cannula body is provided with a pressure conduit fixedly connected to the inner wall of one side of the cannula body. One end of the catheter is located at the end of the lower hose, and the other end of the pressure catheter extends to the outside of the upper hose and is provided with a pressure sensor connector, which is used to connect with the pressure sensor of the ventilator .
A ventilator cannula according to claim 1, wherein the cannula body is further provided with a balloon catheter fixedly connected to the inner wall of the other side of the cannula body, and one end of the balloon catheter is connected to The airbag is connected in a sealed manner, and the other end of the airbag catheter extends to the outside of the upper hose and is fixedly connected with an inflation interface for inflating the airbag.
The intubation for a ventilator according to claim 2, wherein a one-way inflation valve is provided in the inflation interface, and two ends of the one-way inflation valve are respectively connected to the balloon catheter and the inflation interface.
The respirator cannula according to claim 1, wherein the outer tube wall of the lower hose is marked with graduation lines.
The ventilator cannula according to claim 1, wherein a plurality of anti-clogging tubes are provided at one end of the pressure catheter, and the plurality of the anti-clogging tubes are fixedly connected with the pressure catheter, and the A sampling through hole is opened at one end away from the pressure conduit.
The ventilator cannula according to claim 1, wherein the pressure sensor connector is provided with a one-way valve, and two ends of the one-way valve are connected to the pressure tube and the pressure sensor respectively. connection.
A method for using intubation of a ventilator is characterized in that it comprises:

Coat the surface of the lower hose with anesthetic and lubricant;

Insert the lower hose into the patient’s trachea;

Inflate the airbag and make the airbag stuck in the patient's trachea;

Connect the pressure sensor connector and the air source connector to the ventilator to control intrapulmonary pressure ventilation;

Obtain the patient's lung pressure through the pressure sensor on the ventilator;

Transmit the pressure value obtained by the pressure sensor to the ventilator and compare it with the threshold set by the comparator in the ventilator;

Output the comparison result of the comparator to the lung pressure control module;

The intrapulmonary pressure control module controls the ventilator to perform intrapulmonary pressure control ventilation.
The method for using a ventilator intubation according to claim 7, wherein the pressure sensor, the comparator, and the intrapulmonary pressure control module are all installed inside the ventilator and are connected to the breathing machine. Electromechanical connection.
The method for using the intubation of a ventilator according to claim 7, wherein the thickness of the lubricant coated on the surface of the lower hose is 0.1 mm-1 mm.
8. The method for using a ventilator cannula according to claim 8, wherein the pressure sensor is a differential pressure sensor.

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