CN112244808A

CN112244808A - Stomach tube for measuring chest pressure

Info

Publication number: CN112244808A
Application number: CN202011249727.5A
Authority: CN
Inventors: 唐昊; 刘冬; 彭翠翠; 彭晓玉; 张连阳
Original assignee: Chinese Peoples Liberation Army Army Specialized Medical Center
Current assignee: Chinese Peoples Liberation Army Army Specialized Medical Center
Priority date: 2020-11-10
Filing date: 2020-11-10
Publication date: 2021-01-22
Anticipated expiration: 2040-11-10
Also published as: CN112244808B

Abstract

The invention belongs to the field of chest pressure measurement, and particularly relates to a stomach tube for measuring chest pressure. The invention provides a stomach tube for measuring the pressure of the thoracic cavity, which can relieve the pain of a tested person. The technical scheme adopted by the invention is that the stomach tube for measuring the chest pressure comprises an upper computer and an inflation device, and further comprises: the respiratory gas measuring component is in communication connection with the upper computer and is used for monitoring the ventilation volume during respiration; the nostril guide tube is inserted into the nostril and plays a role in guiding; one end of the stomach tube penetrates through the nostril guide tube and enters the esophagus to monitor the esophageal pressure; the other end of the measuring stomach tube is connected with the inflation device, and the measuring stomach tube is in communication connection with an upper computer. This application is through when the monitoring is breathed in by the person, and when gas exchange volume reached the biggest, the miniature electromagnetic valve of control was closed, carried out to the esophagus pressure and markd, very big alleviating measured person's misery when accepting the measurement, and the actual value is pressed close to more to the calibration result.

Description

Stomach tube for measuring chest pressure

Technical Field

The invention belongs to the field of chest pressure measurement, and particularly relates to a stomach tube for measuring chest pressure.

Background

Whether breathing spontaneously or passively, gas entering the alveoli must simultaneously oppose the elastic recoil of the lung and chest wall. The thoracic cavity is between the chest wall and the lungs, and thoracic pressure (intrathoracic pressure) is an important monitoring parameter to distinguish the mechanical properties of the lungs from the chest wall. However, it is not easy to obtain directly clinically, therefore, esophageal pressure is often used as a substitute value for indirectly reflecting thoracic pressure, so as to distinguish the stress contribution of lung and chest wall in the respiratory process, such as lung and chest wall elasticity, inspiratory effort and respiratory work. Early esophageal pressure studies were mostly focused on spontaneous breathing. In recent years, it has been found that transpulmonary pressure based on esophageal pressure monitoring for patients with Acute Respiratory Distress Syndrome (ARDS), representing the stress to which the lungs are subjected during Mechanical Ventilation (MV), is one of the important factors responsible for ventilator-associated lung injury (VILI). Meanwhile, research shows that due to the inhomogeneous lesion of the lung of the ARDS patient, the cross-lung pressure is applied to guide individualized MV parameter setting, the outcome of the ARDS patient can be improved, a multi-center research is started in 2014 in North America at present, and the main observation index is whether the 28-day mortality of the ARDS patient can be reduced or not by monitoring and guiding lung ventilation through the cross-lung pressure compared with standard treatment, so that the prognosis of the patient is improved. Therefore, esophageal pressure monitoring has attracted extensive attention for clinical MV research. However, esophageal pressure monitoring has certain technical requirements, and the measurement result is influenced by various factors, such as the balloon volume, the position, the esophageal wall elasticity, the weight of mediastinal organs and the like of the esophageal pressure monitoring catheter, so that the monitoring technology is mainly used for basic research and is not clinically and routinely applied.

The transpulmonary pressure monitoring makes us step into an individual era for the treatment of ARDS, but the number of hospitals capable of transpulmonary pressure monitoring in China is only two at present, and the reasons for the two hospitals are as follows: the process of determining the position of the catheter is complex and inconvenient to operate and develop. At present, no corresponding catheter is produced in China, import (cooper) is completely relied on, and only part of high-end ventilators can detect the catheter.

A chinese patent publication No. CN110575154A, published as 20191217, discloses a gastric tube for monitoring thoracic pressure. A stomach tube for monitoring chest pressure comprises a tube body, wherein one end of the tube body is connected with a main joint; the pipe body is provided with a main cavity, a first sub cavity, a second sub cavity and a third sub cavity which are mutually independent, the main joint is communicated with the main cavity, and a first joint communicated with the first sub cavity and a second joint communicated with the second sub cavity are fixed on the outer wall of the main joint; the tube body is sleeved with a first balloon and a second balloon; the pipe body is provided with a monitoring probe positioned between the second balloon and the main joint; the monitoring probe comprises a light emitting element and a photoelectric conversion element; the gas injection device is characterized by further comprising a light source, a gas injection joint, a load cell and a micro-processing unit, wherein the micro-processing unit is electrically connected with the photoelectric conversion element, the light source, the display unit and the load cell respectively. The thoracic cavity pressure monitoring device indirectly monitors the thoracic cavity pressure by monitoring the esophageal pressure, greatly reduces the measuring difficulty of the thoracic cavity pressure, has simple and easy monitoring process, and can greatly reduce the monitoring cost of the thoracic cavity pressure.

However, it is disadvantageous in that a great deal of pressure is applied to the esophageal wall during esophageal pressure monitoring, which causes great pain to the subject, and that the eating of the subject is affected by the red swelling of the subject's esophagus after the monitoring is completed.

Disclosure of Invention

Aiming at the technical problems, the invention provides a stomach tube for measuring the thoracic cavity pressure, which can relieve the pain of a tested person.

In order to achieve the above object, the invention adopts a technical scheme that a gastric tube for measuring thoracic cavity pressure comprises an upper computer and an inflation device, and further comprises: the respiratory gas measuring component is in communication connection with the upper computer and is used for monitoring the ventilation volume during respiration; the nostril guide tube is inserted into the nostril and plays a role in guiding; one end of the stomach tube penetrates through the nostril guide tube and enters the esophagus to monitor the esophageal pressure; the other end of the measuring stomach tube is connected with the inflation device, and the measuring stomach tube is in communication connection with an upper computer.

Preferably, said measuring gastric tube comprises: one end of the cardia blocking tube passes through the nostril guide tube and is inserted to the cardia; the monitoring region determining tube is sleeved outside the cardiac plugging tube, is connected with the cardiac plugging tube in a sliding way and is inserted into the esophagus; the interval monitoring tube is sleeved outside the cardiac plugging tube, is positioned in the monitoring interval determining tube and is used for acquiring the esophageal air pressure between the cardiac plugging tube and the determining tube in the monitoring area; the connection bottom plate is positioned at the other end of the monitoring interval determining pipe, is fixedly connected with the end parts of the monitoring interval determining pipe and the interval monitoring pipe, and connects the end parts of the interval detecting pipe and the monitoring interval determining pipe together; the plug tube moving opening is a through hole formed in the middle of the connecting bottom plate and used for enabling the other end of the cardiac plug tube to extend out, so that the cardiac plug tube can slide in the plug tube moving opening; a monitoring space is formed between the cardia plugging tube and the interval monitoring tube; the cardia air bag is arranged at the end part of the cardia plugging tube positioned at the cardia and is used for plugging the cardia; the interval determining air bag is arranged at one end of the interval determining pipe positioned in the esophagus and is fixedly connected with the end part of the interval determining pipe between the monitoring areas, and the interval monitoring determining pipe and the interval determining pipe between the monitoring areas are connected into a whole to form an upper plugging space; the monitoring device is arranged on the connecting bottom plate, is communicated with the upper plugging space and the monitoring space, and is in communication connection with the upper computer; the other end of the cardia plug is connected with an inflating device; the inflation device is also communicated with the monitoring space and the upper plugging space.

Preferably, the side wall of the tube blocking movable opening is provided with a sealing air bag which is communicated with an inflating device and is used for forming a sealing environment for the cardia tube blocking monitoring region.

Preferably, the length of the monitoring interval determination tube is smaller than that of the interval monitoring tube, so that the interval determination balloon can expand towards the esophageal wall in an inflated state.

Preferably, one end of the interval monitoring tube, which is positioned in the esophagus, is provided with a sliding end, and the sliding end is of a frustum-shaped cavity structure; the large end of the sliding end is fixedly connected with the interval monitoring tube, and the small end of the sliding end is slidably connected with the cardia blockage tube; the sliding end is provided with a plurality of vent holes, so that the monitoring space is communicated with the inside of the esophagus.

Preferably, the cardia blockage tube is further provided with a limiting ring, and the limiting ring is positioned at the overlapped part of the interval monitoring tube and the cardia blockage tube and used for limiting the maximum sliding distance of the sliding end.

Preferably, a conical tappet is arranged at one end of the cardiac plugging tube, which is located at the cardiac position, the conical tappet is fixedly connected with the end part of the cardiac plugging tube, the conical tappet is of a cavity structure, and a through hole is formed in the tip part of the conical tappet; the cardia air bag is sleeved on the conical tappet and is fixedly connected with the conical tappet.

Preferably, the small end diameter of the sliding end is the same as the tail end diameter of the conical advancing head.

Preferably, the monitoring device comprises: the first air pressure sensor is arranged on the connecting bottom plate, is communicated with the upper plugging space, is used for monitoring the air pressure of the upper plugging space, and is in communication connection with an upper computer; the first air release valve is arranged on the connecting bottom plate, is communicated with the upper plugging space and is used for discharging the gas in the upper plugging space; the second air pressure sensor is arranged on the connecting bottom plate, is communicated with the monitoring space, is used for detecting the air pressure in the monitoring space and is in communication connection with the upper computer; the air inlet pipe is arranged on the connecting bottom plate and is communicated with the monitoring space; the miniature electromagnetic air valve is arranged in the air inlet pipe, is in communication connection with the upper computer and is used for closing the air inlet pipe.

Preferably, the respiratory gas volume measuring assembly comprises: the mask is used for wrapping the mouth and the nose and is fixed on the head of the tested person; the air vent is arranged on the mask and is used for the circulation of the inner space and the outer space of the mask; the gas flow sensor is arranged in the vent, is in communication connection with the upper computer and is used for measuring the gas exchange amount during respiration; the guide tube through hole is a through hole formed in the mask and used for inserting the nostril guide tube; when the nostril guide tube is inserted into the nose through the guide tube through hole, the air leakage of the guide tube through hole can be prevented.

The invention has the following beneficial effects: the invention abandons the conventional measurement of the esophageal pressure through the air pressure change in the air bag, although the change of the air pressure in the air bag is sensitive when the esophageal pressure is measured, because of the multilayer structure, the esophageal pressure is greatly pressed when the high sensitivity is needed to be realized, thereby bringing great pain to the measured person and having monitoring sequelae, so the invention measures the esophageal pressure by the pressure change in the esophagus close to the stomach 1/3, greatly relieving the pain of the patient, meanwhile, during the calibration, the patient is required to shield at the end of inspiration and gradually inflate the air bag, the time is longer, finally the calibration result is lower than the actual value, and great discomfort is brought to the measured person, therefore, when the measured person inhales, when the gas exchange amount reaches the maximum, the micro electromagnetic gas valve is controlled to be closed, the esophageal pressure is calibrated, the pain of a measured person in measurement is greatly relieved, and the calibration result is closer to the actual value.

Drawings

In order to more clearly illustrate the invention in its embodiments, reference will now be made briefly to the accompanying drawings, which are to be used in the embodiments. In all the drawings, the elements or parts are not necessarily drawn to actual scale.

FIG. 1 is a schematic view of the logic of the connection between the stomach tube and the upper computer

FIG. 2 is a schematic view showing the structure of the gastric tube in the esophagus

FIG. 3 is a schematic view of the structure of the gastric tube outside the stomach

FIG. 4 is a schematic view of a respiratory airflow measurement module

FIG. 5 is a schematic view of the structure of the nostril guiding tube

Reference numerals:

1-an upper computer, 2-a cardia plugging tube, 21-a limiting ring, 22-a conical tappet, 23-a cardia air bag, 3-an interval monitoring tube, 31-a monitoring space, 32-a sliding end, 4-a monitoring interval determining tube, 41-an upper plugging space, 42-an interval determining air bag, 5-a connecting bottom plate, 51-a sealing air bag, 52-an air inlet tube, 53-a miniature electromagnetic air valve, 54-a first air pressure sensor, 55-a first air release valve, 56-a second air pressure sensor, 6-a respiratory gas quantity measuring component, 61-a mask, 62-an air vent, 63-a guide tube through hole, 7-an inflating device, 8-a sealing disc and 9-a conical hollow tube.

Detailed Description

Embodiments of the present invention will be described in detail below with reference to the accompanying drawings. The following examples are only for illustrating the technical solutions of the present invention more clearly, and therefore are only used as examples, and the protection scope of the present invention is not limited thereby.

The utility model provides a stomach tube for measuring chest pressure, includes host computer 1 and aerating device 7, still includes: respiratory gas volume measuring unit 6, measure stomach tube and nostril stand pipe.

As shown in fig. 2, one end of the measuring stomach tube passes through the nostril guiding tube and enters the esophagus to monitor the esophageal pressure. The other end of the measuring stomach tube is connected with the inflation device 7, and the measuring stomach tube is in communication connection with the upper computer 1. The measuring stomach tube includes: the cardia blockage tube 2, the interval monitoring tube 3, the monitoring interval determining tube 4, the connecting bottom plate 5, the cardia air bag 23, the monitoring device, the blockage tube moving opening and the interval determining air bag 42.

One end of the cardia blockage tube 2 is inserted into the cardia through the nostril guide tube. The tube 4 for determining the monitoring interval is sleeved outside the cardiac plugging tube 2, is connected with the cardiac plugging tube 2 in a sliding way and is inserted into the esophagus. The interval monitoring sleeve is sleeved outside the cardiac plugging tube 2 and is positioned in the interval monitoring confirming tube 4 and used for collecting esophageal air pressure between the cardiac plugging tube 2 and the interval monitoring confirming tube 4. A monitoring space 31 is formed between the cardia blockage tube 2 and the interval monitoring tube 3. The cardia air sac 23 is arranged at the end part of the cardia plugging tube 2 at the cardia and is used for plugging the cardia. The interval determination air bag 42 is installed at one end of the interval determination tube positioned in the esophagus and fixedly connected with the end part of the interval determination tube 4, and the interval monitoring determination tube and the interval determination tube 4 are connected into a whole to form an upper plugging space 41. The other end of the cardia blockage tube 2 is connected with an inflation device 7. The inflator 7 also communicates with the monitoring space 31 and the upper blocked space 41. The cardia is blocked by the cardia air bag 23, so that the space of the stomach and the esophagus is divided, the region determining air bag 42 is used, a barrier is formed in the esophagus, a tested space formed by the esophagus wall, the cardia air bag 23 and the region determining air bag 42 is formed, the space is generally positioned in the esophagus and is close to the stomach 1/3, the esophagus pressure can be monitored by monitoring the air pressure change in the tested space, and the thoracic cavity pressure is monitored.

The length of the interval-determining tube 4 is smaller than the length of the interval-monitoring tube 3, so that the interval-determining balloon 42 can be expanded toward the esophageal wall in the inflated state. The section monitoring tube 3 is provided with a sliding end 32 at one end in the esophagus, and the sliding end 32 is of a frustum-shaped cavity structure. The large end of the sliding end 32 is fixedly connected with the interval monitoring tube 3, and the small end of the sliding end 32 is slidably connected with the cardia blockage tube 2. The sliding end 32 is provided with a plurality of ventilation holes so that the monitoring space 31 communicates with the inside of the esophagus.

The cardia blockage tube 2 is also provided with a limiting ring 21, and the limiting ring 21 is positioned at the overlapped part of the interval monitoring tube 3 and the cardia blockage tube 2 and used for limiting the maximum sliding distance of the sliding end 32. The one end that stifled pipe of cardia 2 is located cardia department is provided with the head 22 is advanced in the toper, and the tip fixed connection of head 22 and stifled pipe of cardia 2 is advanced in the toper, and the head 22 is advanced in the toper is the cavity structure, has seted up the through-hole at the sharp portion of head 22 is advanced in the toper simultaneously. The cardiac gasbag 23 is sleeved on the conical tappet head 22 and fixedly connected with the conical tappet head 22. The small end diameter of the sliding end 32 is the same as the diameter of the trailing end of the tapered tappet 22.

The stomach tube is composed of a plurality of tube sleeves with different lengths, so that steps are inevitably formed, the stomach tube is easy to damage the esophagus wall in the process of entering the esophagus, and the sliding end 32 and the conical tappet 22 are designed. Therefore, at the stage of arranging the measuring gastric tube, the sliding end 32 is in contact with the tapered advancing head 22, and the connecting bottom plate 5 is pushed externally, so that the measuring gastric tube can enter the preset position safely and smoothly.

As shown in fig. 3, the connection base plate 5 is located at the other end of the monitoring interval determination pipe 4, and is fixedly connected to the end portions of the monitoring interval determination pipe 4 and the interval monitoring pipe 3, and connects the end portions of the interval detection pipe and the monitoring interval determination pipe 4 together. The plug tube moving opening is a through hole arranged in the middle of the connecting bottom plate 5 and used for extending the other end of the cardiac plug tube 2, so that the cardiac plug tube 2 can slide in the plug tube moving opening. The side wall of the tube plugging movable opening is provided with a sealing air bag 51, and the sealing air bag 51 is communicated with an inflating device 7 and used for forming a sealing environment for the cardiac tube plugging 2 monitoring region.

When the measuring gastric tube is not arranged, the sealing air bag 51 is in an atrophy state, the sealing air bag 51 does not contact with the cardiac plugging tube 2 at the moment, and the cardiac plugging tube 2 can slide with the interval monitoring tube 3 at the moment. Therefore, when the cardia blockage tube 2 is arranged, after the conical advancing head 22 reaches a certain position, a certain amount of gas is filled into the cardia blockage tube 2 through the inflating device 7, so that the cardia air bag 23 is expanded to a certain degree. Then the cardia blockage tube 2 is pulled to ensure that the cardia air bag 23 is blocked at the cardia opening, and at the moment, obvious resistance is generated by pulling the cardia blockage tube 2. The connection base plate 5 is then pulled so that the sliding end 32 slides over the cardiac occluder tube 2, at which point the cardiac air bag 23 fits more compactly at the cardiac opening under the influence of friction. Until the sliding end 32 comes into contact with the retainer ring 21, a resistance feeling in pulling also occurs.

Then the space 41 is sealed upwards by the inflating device 7 to inflate, so that the interval determining air bag 42 is expanded and generates certain pressure to the esophagus wall, the pressure does not need to be too large, as long as the overflow between the gas esophagus wall of the tested space and the interval determining air bag 42 can be prevented, and the pressure value can be observed by a monitoring device. The measurement of the placement of the gastric tube in the esophagus is completed when the interval determination balloon 42 is inflated to a certain extent. The sealing balloon 51 is then inflated by the inflation device 7, so that the sealing balloon 51 expands and serves to fix the cardiac occluder tube 2 at the inner ring of the sealing balloon 51 and to seal the monitoring space 31.

As shown in fig. 1, the monitoring device is mounted on the connection base plate 5, communicates with the upper plugged space 41 and the monitoring space 31, and is connected to the upper computer 1 in a communication manner. The monitoring device includes: a first air pressure sensor, a first air release valve, a second air pressure sensor, an air inlet pipe 52 and a miniature electromagnetic valve. The first air pressure sensor is installed on the connecting bottom plate 5, is communicated with the upper plugging space 41, is used for monitoring the air pressure of the upper plugging space 41, and is in communication connection with the upper computer 1. The first air release valve is installed on the connecting bottom plate 5, is communicated with the upper blocking space 41 and is used for discharging the gas in the upper blocking space 41. No. two baroceptors are installed on connecting bottom plate 5, communicate with monitoring space 31 for detect the atmospheric pressure in the monitoring space 31, and with host computer 1 communication connection. An intake duct 52 is mounted on the connection base plate 5 to communicate with the monitoring space 31. The micro electromagnetic air valve 53 is installed in the air inlet pipe 52, is in communication connection with the upper computer 1, and is used for closing the air inlet pipe 52.

Therefore, after the gastric tube is arranged and measured, the gastric tube enters a monitoring and calibrating stage, a measured person actively inhales at the moment, the respiratory air quantity measuring assembly 6 starts to transport air at the moment, and when the maximum value of the gas exchange quantity is monitored, the upper computer 1 controls the micro electromagnetic air valve 53 to be closed, so that the monitoring space 31 and the measured space form a completely sealed space, and calibration is further completed. Then, with the respiration of the tested person, the change of the chest pressure further influences the air pressure change in the tested space, and the change value is transmitted to the upper computer 1 through the second air pressure sensor for processing.

Of course, in the present application, the air pressure monitoring sensors and the air release valve in the cardiac air bag 23 and the cardiac intubation tube 2 are also available, but the installation position and the connection relationship thereof are the routine operations of those skilled in the art, so no more description is made, and all the purposes of alleviating the pain to be measured, avoiding the occurrence of more sequelae and controlling the accuracy are all achieved. The maximum amount of air in each air bag and the air pressure value are related to the characteristics of the air bag configured in the actual operation, and need to be set according to the characteristics of the adopted air bag, so that the air bag is not set too much in the application.

As shown in fig. 4, the respiratory air volume measuring module 6 is connected to the upper computer 1 for monitoring the ventilation volume during respiration. Particularly, regarding the respiratory gas measuring assembly 6, the main function is to monitor the gas exchange amount of the tested person during breathing, so that the device for measuring the respiratory gas amount is provided according to the arrangement of the environment, such as the environment where the tested person is located, and when the device is used with the stomach tube, the existing device for measuring the respiratory gas amount is used.

If there is no device capable of measuring the amount of respiratory gas or no device compatible with the gastric tube in the subject's environment, the respiratory gas amount measuring module 6 described below can be used.

The respiratory gas volume measuring assembly 6 comprises: mask 61, vent 62, gas flow sensor and guide tube through hole 63. The face mask 61 is used for wrapping the mouth and the nose and is fixed on the head of the tested person. The vent 62 is opened in the mask 61 and is used for circulation of the space inside and outside the mask 61. The gas flow sensor is installed in the vent 62, is in communication connection with the upper computer 1, and is used for measuring the gas exchange amount during respiration. The guide tube is a through hole formed on the mask 61 and used for inserting the nostril guide tube. The nostril guide tube prevents air leakage from the guide tube through hole 63 when inserted into the nose through the guide tube through hole 63. In practical use, the ventilation opening 62 may be provided with a device that is matched with other gas supply devices, so that the measured person can still measure the esophageal pressure under special conditions.

As shown in fig. 5, the nostril guide tube is used for inserting into the nostril and plays a guiding role. The nostril guide tube consists of a sealing disc 8 and a conical hollow tube 9. The sealing disc 8 is annular, then the large end of the conical hollow tube 9 is fixedly connected with the sealing disc 8, and the small end of the conical hollow tube 9 is used for being inserted into a nostril. Because the rear section of the nostril of the human body is relatively delicate and sensitive, the foreign body discharge phenomena of sneezing or snivel can be caused in the process of stretching the measuring stomach tube, and a large amount of bacteria exist in the nostril, so that the measuring stomach tube is directly stretched into the esophagus through the nostril, the bacteria with the nasal cavity can be adhered on the measuring stomach tube in the process of arranging the measuring catheter, and the risk of esophagus infection exists for the tested person. Measure the stomach tube simultaneously all longer, so when arranging, measure the stomach tube and can move all the time in the nostril, and then can cause the foreign body reaction of health such as sneezing to appear by the quilt, influence the arrangement of measuring the stomach tube, so this application a stomach tube for measuring the thorax be complete with disposable nostril stand pipe, when using, insert the nostril stand pipe in the nostril earlier, then will measure the stomach tube and insert the esophagus through the nostril stand pipe in, can avoid the quilt to appear influencing the problem of measuring the stomach tube and arranging such as sneezing to and also can avoid the risk of esophagus infection.

When the nostril guide tube is matched with the mask 61 for use, the space in the mask 61 can be divided, and the sealing disc 8 can also seal the guide channel on the mask 61, so that the finally measured respiratory air volume is more accurate.

The invention abandons the conventional measurement of the esophageal pressure through the air pressure change in the air bag, although the change of the air pressure in the air bag is sensitive when the esophageal pressure is measured, because of the multilayer structure, the esophageal pressure is greatly pressed when the high sensitivity is needed to be realized, thereby bringing great pain to the measured person and having monitoring sequelae, so the invention measures the esophageal pressure by the pressure change in the esophagus close to the stomach 1/3, greatly relieving the pain of the patient, meanwhile, during the calibration, the patient is required to shield at the end of inspiration and gradually inflate the air bag, the time is longer, finally the calibration result is lower than the actual value, and great discomfort is brought to the measured person, therefore, when the measured person inhales, when the gas exchange amount reaches the maximum, the micro electromagnetic gas valve 53 is controlled to be closed, the esophageal pressure is calibrated, the pain of a measured person in measurement is greatly relieved, and the calibration result is closer to the actual value.

The above embodiments are only used to illustrate the technical solution of the present invention, and not to limit the same. While the invention has been described in detail and with reference to the foregoing embodiments, it will be understood by those skilled in the art that: it is also possible to modify the solutions described in the previous embodiments or to substitute some or all of them with equivalents. The modifications or the substitutions do not make the essence of the corresponding technical solution depart from the scope of the technical solution of the embodiments of the present invention, and the technical solution is covered by the claims and the specification of the present invention.

Claims

1. The utility model provides a stomach tube for measuring thorax pressure, includes host computer and aerating device, its characterized in that still includes:

the respiratory gas measuring component is in communication connection with the upper computer and is used for monitoring the ventilation volume during respiration;

the nostril guide tube is inserted into the nostril and plays a role in guiding;

one end of the stomach tube penetrates through the nostril guide tube and enters the esophagus to monitor the esophageal pressure;

the other end of the measuring stomach tube is connected with the inflation device, and the measuring stomach tube is in communication connection with an upper computer.

2. A gastric tube for measuring chest pressure according to claim 1, wherein said gastric tube comprises:

one end of the cardia blocking tube passes through the nostril guide tube and is inserted to the cardia;

the monitoring region determining tube is sleeved outside the cardiac plugging tube, is connected with the cardiac plugging tube in a sliding way and is inserted into the esophagus;

the interval monitoring tube is sleeved outside the cardiac plugging tube, is positioned in the monitoring interval determining tube and is used for acquiring the esophageal air pressure between the cardiac plugging tube and the determining tube in the monitoring area;

the connection bottom plate is positioned at the other end of the monitoring interval determining pipe, is fixedly connected with the end parts of the monitoring interval determining pipe and the interval monitoring pipe, and connects the end parts of the interval detecting pipe and the monitoring interval determining pipe together;

the plug tube moving opening is a through hole formed in the middle of the connecting bottom plate and used for enabling the other end of the cardiac plug tube to extend out, so that the cardiac plug tube can slide in the plug tube moving opening;

a monitoring space is formed between the cardia plugging tube and the interval monitoring tube;

the cardia air bag is arranged at the end part of the cardia plugging tube positioned at the cardia and is used for plugging the cardia;

the interval determining air bag is arranged at one end of the interval determining pipe positioned in the esophagus and is fixedly connected with the end part of the interval determining pipe between the monitoring areas, and the interval monitoring determining pipe and the interval determining pipe between the monitoring areas are connected into a whole to form an upper plugging space;

the monitoring device is arranged on the connecting bottom plate, is communicated with the upper plugging space and the monitoring space, and is in communication connection with the upper computer;

the other end of the cardia plug is connected with an inflating device;

the inflation device is also communicated with the monitoring space and the upper plugging space.

3. A gastric tube for measuring chest pressure according to claim 2, wherein a sealing balloon is mounted on the lateral wall of the opening of the blocking tube, said sealing balloon communicating with an inflation device for forming a sealed environment for the cardiac blocking tube monitoring zone.

4. A gastric tube for measuring chest pressure according to claim 3, wherein said monitoring interval determining tube has a length less than the length of the interval monitoring tube, such that the interval determining balloon is expandable in an inflated state towards the esophageal wall.

5. A gastric tube for measuring chest pressure according to claim 4, wherein the section monitoring tube has a sliding end at the end located in the esophagus, and the sliding end is of a frustum-shaped cavity structure; the large end of the sliding end is fixedly connected with the interval monitoring tube, and the small end of the sliding end is slidably connected with the cardia blockage tube; the sliding end is provided with a plurality of vent holes, so that the monitoring space is communicated with the inside of the esophagus.

6. A gastric tube for measuring chest pressure according to claim 5, wherein said cardiac occluder is further provided with a stop collar located at the overlapping portion of the interval monitor tube and cardiac occluder for limiting the maximum sliding distance of the sliding end.

7. The gastric tube for measuring the thoracic cavity pressure as claimed in claim 5, wherein a tapered advancing head is arranged at one end of the cardiac plugging tube located at the cardiac, the tapered advancing head is fixedly connected with the end of the cardiac plugging tube, the tapered advancing head is of a cavity structure, and a through hole is formed at the tip of the tapered advancing head; the cardia air bag is sleeved on the conical tappet and is fixedly connected with the conical tappet.

8. A gastric tube for measuring chest pressure according to claim 7 wherein the small end diameter of the sliding end is the same as the diameter of the tail end of the tapered tappet.

9. A gastric tube for measuring chest pressure according to claim 2 wherein said monitoring device comprises:

the first air pressure sensor is arranged on the connecting bottom plate, is communicated with the upper plugging space, is used for monitoring the air pressure of the upper plugging space, and is in communication connection with an upper computer;

the first air release valve is arranged on the connecting bottom plate, is communicated with the upper plugging space and is used for discharging the gas in the upper plugging space;

the second air pressure sensor is arranged on the connecting bottom plate, is communicated with the monitoring space, is used for detecting the air pressure in the monitoring space and is in communication connection with the upper computer;

the air inlet pipe is arranged on the connecting bottom plate and is communicated with the monitoring space;

the miniature electromagnetic air valve is arranged in the air inlet pipe, is in communication connection with the upper computer and is used for closing the air inlet pipe.

10. A gastric tube for measuring chest pressure according to claim 1, wherein said respiratory flow measurement assembly comprises:

the mask is used for wrapping the mouth and the nose and is fixed on the head of the tested person;

the air vent is arranged on the mask and is used for the circulation of the inner space and the outer space of the mask;

the gas flow sensor is arranged in the vent, is in communication connection with the upper computer and is used for measuring the gas exchange amount during respiration;

the guide tube through hole is a through hole formed in the mask and used for inserting the nostril guide tube;

when the nostril guide tube is inserted into the nose through the guide tube through hole, the air leakage of the guide tube through hole can be prevented.