CN112244808B - Stomach tube for measuring chest cavity pressure - Google Patents
Stomach tube for measuring chest cavity pressure Download PDFInfo
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- CN112244808B CN112244808B CN202011249727.5A CN202011249727A CN112244808B CN 112244808 B CN112244808 B CN 112244808B CN 202011249727 A CN202011249727 A CN 202011249727A CN 112244808 B CN112244808 B CN 112244808B
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- 210000000115 thoracic cavity Anatomy 0.000 title claims abstract description 27
- 210000002784 stomach Anatomy 0.000 title claims abstract description 25
- 238000012544 monitoring process Methods 0.000 claims abstract description 116
- 230000002496 gastric effect Effects 0.000 claims abstract description 40
- 210000003238 esophagus Anatomy 0.000 claims abstract description 29
- 238000004891 communication Methods 0.000 claims abstract description 25
- 238000005259 measurement Methods 0.000 claims abstract description 19
- 230000029058 respiratory gaseous exchange Effects 0.000 claims abstract description 16
- 238000009423 ventilation Methods 0.000 claims abstract description 6
- 230000000747 cardiac effect Effects 0.000 claims description 89
- 230000000903 blocking effect Effects 0.000 claims description 32
- 238000007789 sealing Methods 0.000 claims description 20
- 230000000241 respiratory effect Effects 0.000 claims description 14
- 238000012806 monitoring device Methods 0.000 claims description 7
- 238000000034 method Methods 0.000 abstract description 7
- 238000009530 blood pressure measurement Methods 0.000 abstract description 2
- 230000008859 change Effects 0.000 description 9
- 210000004072 lung Anatomy 0.000 description 7
- 210000003128 head Anatomy 0.000 description 6
- 206010001052 Acute respiratory distress syndrome Diseases 0.000 description 5
- 208000013616 Respiratory Distress Syndrome Diseases 0.000 description 4
- 201000000028 adult respiratory distress syndrome Diseases 0.000 description 4
- 238000005399 mechanical ventilation Methods 0.000 description 4
- 210000001331 nose Anatomy 0.000 description 4
- 210000000779 thoracic wall Anatomy 0.000 description 4
- 206010008469 Chest discomfort Diseases 0.000 description 3
- 230000008569 process Effects 0.000 description 3
- 238000012545 processing Methods 0.000 description 3
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- 230000035882 stress Effects 0.000 description 2
- 208000004852 Lung Injury Diseases 0.000 description 1
- 206010058803 Oesophageal infection Diseases 0.000 description 1
- 206010039101 Rhinorrhoea Diseases 0.000 description 1
- 206010069363 Traumatic lung injury Diseases 0.000 description 1
- 230000004888 barrier function Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
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- 210000000038 chest Anatomy 0.000 description 1
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- 230000037431 insertion Effects 0.000 description 1
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- 230000003902 lesion Effects 0.000 description 1
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- 238000004519 manufacturing process Methods 0.000 description 1
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Classifications
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B5/00—Measuring for diagnostic purposes; Identification of persons
- A61B5/03—Detecting, measuring or recording fluid pressure within the body other than blood pressure, e.g. cerebral pressure; Measuring pressure in body tissues or organs
- A61B5/036—Detecting, measuring or recording fluid pressure within the body other than blood pressure, e.g. cerebral pressure; Measuring pressure in body tissues or organs by means introduced into body tracts
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B5/00—Measuring for diagnostic purposes; Identification of persons
- A61B5/03—Detecting, measuring or recording fluid pressure within the body other than blood pressure, e.g. cerebral pressure; Measuring pressure in body tissues or organs
- A61B5/036—Detecting, measuring or recording fluid pressure within the body other than blood pressure, e.g. cerebral pressure; Measuring pressure in body tissues or organs by means introduced into body tracts
- A61B5/037—Measuring oesophageal pressure
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B5/00—Measuring for diagnostic purposes; Identification of persons
- A61B5/08—Detecting, measuring or recording devices for evaluating the respiratory organs
- A61B5/087—Measuring breath flow
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B5/00—Measuring for diagnostic purposes; Identification of persons
- A61B5/68—Arrangements of detecting, measuring or recording means, e.g. sensors, in relation to patient
- A61B5/6846—Arrangements of detecting, measuring or recording means, e.g. sensors, in relation to patient specially adapted to be brought in contact with an internal body part, i.e. invasive
- A61B5/6847—Arrangements of detecting, measuring or recording means, e.g. sensors, in relation to patient specially adapted to be brought in contact with an internal body part, i.e. invasive mounted on an invasive device
- A61B5/6852—Catheters
- A61B5/6853—Catheters with a balloon
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B5/00—Measuring for diagnostic purposes; Identification of persons
- A61B5/68—Arrangements of detecting, measuring or recording means, e.g. sensors, in relation to patient
- A61B5/6846—Arrangements of detecting, measuring or recording means, e.g. sensors, in relation to patient specially adapted to be brought in contact with an internal body part, i.e. invasive
- A61B5/6867—Arrangements of detecting, measuring or recording means, e.g. sensors, in relation to patient specially adapted to be brought in contact with an internal body part, i.e. invasive specially adapted to be attached or implanted in a specific body part
- A61B5/687—Oesophagus
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
- A61M25/00—Catheters; Hollow probes
- A61M25/0021—Catheters; Hollow probes characterised by the form of the tubing
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
- A61M25/00—Catheters; Hollow probes
- A61M25/0021—Catheters; Hollow probes characterised by the form of the tubing
- A61M25/0023—Catheters; Hollow probes characterised by the form of the tubing by the form of the lumen, e.g. cross-section, variable diameter
- A61M25/0026—Multi-lumen catheters with stationary elements
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
- A61M25/00—Catheters; Hollow probes
- A61M25/0043—Catheters; Hollow probes characterised by structural features
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
- A61M25/00—Catheters; Hollow probes
- A61M25/10—Balloon catheters
- A61M25/1011—Multiple balloon catheters
Abstract
The invention belongs to the field of chest cavity pressure measurement, and particularly relates to a stomach tube for measuring chest cavity pressure. The invention provides a stomach tube for measuring chest cavity pressure, which can relieve pain of a tested person. The technical scheme adopted by the invention is that the stomach tube for measuring chest cavity pressure comprises an upper computer and an air charging device, and further comprises: the breathing gas measuring assembly is in communication connection with the upper computer and is used for monitoring the ventilation during breathing; the nostril guide tube is used for being inserted into nostrils to play a guide role; measuring the gastric tube, wherein one end of the gastric tube passes through the nostril guide tube and enters the esophagus to monitor the esophageal pressure; the other end of the measurement stomach tube is connected with the inflation device, and the measurement stomach tube is in communication connection with the upper computer. According to the method, when the gas exchange quantity reaches the maximum when the detected person inhales, the miniature electromagnetic air valve is controlled to be closed, the esophageal pressure is calibrated, the pain of the detected person when the detected person receives measurement is greatly relieved, and the calibration result is closer to the actual value.
Description
Technical Field
The invention belongs to the field of chest cavity pressure measurement, and particularly relates to a stomach tube for measuring chest cavity pressure.
Background
Whether spontaneously breathing or passively ventilating, gas enters the alveoli to oppose the elastic recoil of both the lung and chest wall. Chest pressure (intrathoracic pressure) is an important monitoring parameter that distinguishes between the lung and the chest wall mechanics. However, chest cavity pressure is not readily available in clinic, and therefore esophageal pressure is often used as an alternative to indirectly reflect chest cavity pressure to distinguish the contribution of lung and chest wall stress during respiration, such as lung and chest wall elasticity, inspiratory effort and respiratory effort, and the like. Early esophageal pressure studies have focused on spontaneous breathing. In recent years, it has been found that trans-pulmonary pressure, based on esophageal pressure monitoring, represents the stress experienced by the lungs during Mechanical Ventilation (MV) in patients with Acute Respiratory Distress Syndrome (ARDS), and is one of the important factors responsible for ventilator-associated lung injury (VILI). Meanwhile, studies show that due to the heterogeneous lesions of the lungs of ARDS patients, the application of cross-lung pressure to guide the personalized MV parameter setting possibly improves the outcome of the ARDS patients, a multi-center study is started in 2014 in North America, and the main observation index is whether the cross-lung pressure monitoring to guide the lung ventilation can reduce the 28-day mortality of the ARDS patients compared with standard treatment, thereby improving the prognosis of the patients. Therefore, esophageal pressure monitoring has attracted considerable attention in clinical MV research. However, esophageal pressure monitoring has certain technical requirements, and the measurement results are affected by various factors, such as the balloon volume, the position, the elasticity of the esophageal wall, the weight of the mediastinum organ and the like of the esophageal pressure monitoring catheter, so that the monitoring technology is used for basic research and is not applied in clinical routine.
The cross-lung pressure monitoring enables us to step into an individuation age for ARDS treatment, but the number of hospitals capable of performing cross-lung pressure monitoring in China is only two at present, and the reason is that: the process of determining the position of the catheter is complex, and is inconvenient to operate and develop. At present, no corresponding catheter production is in China, the import (cooper) is completely relied on, and only part of high-end respirators can be detected.
A chinese patent publication No. CN110575154a, publication No. 20191217, discloses a gastric tube for monitoring chest cavity pressure. A stomach tube for monitoring chest cavity 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 subcavity, a second subcavity and a third subcavity which are mutually independent, the main joint is communicated with the main cavity, and a first joint communicated with the first subcavity and a second joint communicated with the second subcavity 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 saccule and the main joint; the monitoring probe comprises a light emitting element and a photoelectric conversion element; the device also comprises a light source, an air 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. According to the invention, through monitoring of esophageal pressure, monitoring of chest cavity pressure is indirectly realized, the measurement difficulty of chest cavity pressure is greatly reduced, the monitoring process is simple and feasible, and the chest cavity pressure monitoring cost can be greatly reduced.
However, the method has the disadvantages that when the esophageal pressure is monitored, the great pressure is required to be caused on the esophageal wall, so that great pain is brought to the tested person, and after the monitoring is finished, the condition that the esophagus of the tested person is red and swollen and the like affects the feeding condition of the tested person and the like.
Disclosure of Invention
Aiming at the technical problems, the invention provides the stomach tube for measuring the chest cavity pressure, which can relieve the pain of a tested person.
In order to achieve the above purpose, the technical scheme adopted by the invention is that the stomach tube for measuring chest cavity pressure comprises an upper computer and an air charging device, and further comprises: the breathing gas measuring assembly is in communication connection with the upper computer and is used for monitoring the ventilation during breathing; the nostril guide tube is used for being inserted into nostrils to play a guide role; measuring the gastric tube, wherein one end of the gastric tube passes through the nostril guide tube and enters the esophagus to monitor the esophageal pressure; the other end of the measurement stomach tube is connected with the inflation device, and the measurement stomach tube is in communication connection with the upper computer.
Preferably, the gastric tube comprises: the cardiac blocking tube, one end of which passes through the nostril guiding tube and is inserted into the cardiac position; the monitoring interval determining tube is sleeved outside the cardiac blocking tube, is connected with the cardiac blocking tube in a sliding way and is inserted into the esophagus; the interval monitoring tube is sleeved outside the cardiac blockage tube and is positioned in the monitoring interval determining tube and used for collecting esophageal air pressure between the cardiac blockage tube and the monitoring interval determining tube; the connecting bottom plate is positioned at the other end of the monitoring interval determining pipe, is fixedly connected with the ends of the monitoring interval determining pipe and the interval monitoring pipe, and is used for connecting the ends of the interval detecting pipe and the monitoring interval determining pipe together; the movable opening of the cardiac plugging tube is a through hole formed in the middle of the connecting bottom plate and is used for extending out of the other end of the cardiac plugging tube, so that the cardiac plugging tube can slide in the movable opening of the plugging tube; a monitoring space is formed between the cardiac blocking pipe and the interval monitoring pipe; the cardiac airbag is arranged at the end part of the cardiac blocking pipe, which is positioned at the cardiac position, and is used for blocking the cardiac; the interval determining air bag is arranged at one end of the interval determining pipe, which is positioned in the esophagus, and is fixedly connected with the end part of the monitoring interval determining pipe, and the interval monitoring determining pipe and the monitoring interval determining pipe 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 cardiac blocking pipe is connected with an air charging device; the air charging device is also communicated with the monitoring space and the upper plugging space.
Preferably, the side wall of the movable port of the cardiac obstruction tube is provided with a sealing air bag, and the sealing air bag is communicated with the inflating device and is used for forming a sealing environment for the cardiac obstruction tube monitoring zone.
Preferably, the length of the monitoring section determining tube is smaller than that of the section monitoring tube, so that the section determining balloon can expand towards the esophageal wall in an inflated state.
Preferably, a sliding end is arranged at one end of the interval monitoring tube, which is positioned in the esophagus, and the sliding end is of a frustum type 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 in sliding connection with the cardiac blocking tube; the sliding end is provided with a plurality of vent holes, so that the monitoring space is communicated with the esophagus.
Preferably, the cardiac blocking tube is further provided with a limiting ring, and the limiting ring is located at an overlapping section of the interval monitoring tube and the cardiac blocking tube and used for limiting the maximum sliding distance of the sliding end.
Preferably, one end of the cardiac blocking pipe, which is positioned at the cardiac position, is provided with a conical tappet, the conical tappet is fixedly connected with the end part of the cardiac blocking pipe, the conical tappet is of a cavity structure, and meanwhile, the tip part of the conical tappet is provided with a through hole; the cardiac airbag 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 tappet.
Preferably, the monitoring device includes: the first air pressure sensor is arranged on the connecting bottom plate and communicated with the upper plugging space and is used for monitoring the air pressure of the upper plugging space and is in communication connection with the upper computer; the first air escape valve is arranged on the connecting bottom plate and communicated with the upper plugging space and is used for exhausting the air in the upper plugging space; the second air pressure sensor is arranged on the connecting bottom plate and communicated with the monitoring space, and 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 measurement assembly includes: the mask is used for wrapping the mouth and nose and is fixed on the head of the tested person; the air vent is arranged on the mask and is used for circulating the inner space and the outer space of the mask; the gas flow sensor is arranged in the air vent, is in communication connection with the upper computer and is used for measuring the gas exchange amount during breathing; 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 a nose through the guide tube through hole, the guide tube through hole can be prevented from leaking air.
The invention has the beneficial effects that: the invention provides a method for measuring the esophageal pressure by the change of the air pressure in an air bag, which abandons the conventional measurement of the esophageal pressure by the change of the air pressure in the air bag, but because of the multilayer structure, the air pressure in the air bag is more sensitive, the air pressure in the air bag needs to be greatly pressed against the esophageal wall when the air pressure in the air bag is measured, and further the air pressure in the air bag is extremely painful to a measured person, and monitoring sequelae exist.
Drawings
In order to more clearly illustrate the inventive embodiments, the drawings that are required to be used in the embodiments will be briefly described. Throughout the drawings, the elements or portions are not necessarily drawn to actual scale.
FIG. 1 is a schematic diagram showing the logic of the connection between the gastric tube and the host computer
FIG. 2 is a schematic view of the structure of the gastric tube in the esophagus
FIG. 3 is a schematic view of the structure of the gastric tube
FIG. 4 is a schematic diagram of a respiratory gas measurement assembly
Figure 5 is a schematic view of the nostril guiding tube
Reference numerals:
the device comprises a 1-upper computer, a 2-cardiac blocking pipe, a 21-limiting ring, a 22-conical tappet, a 23-cardiac airbag, a 3-interval monitoring pipe, a 31-monitoring space, a 32-sliding end, a 4-monitoring interval determining pipe, a 41-upper blocking space, a 42-interval determining airbag, a 5-connecting bottom plate, a 51-sealing airbag, a 52-air inlet pipe, a 53-miniature electromagnetic air valve, a 54-first air pressure sensor, a 55-first air release valve, a 56-second air pressure sensor, a 6-respiratory air volume measuring component, a 61-mask, a 62-vent, a 63-guiding pipe through hole, a 7-inflating device, an 8-sealing disk and a 9-conical empty pipe.
Detailed Description
Embodiments of the inventive aspects of the present invention will be described in detail below with reference to the accompanying drawings. The following examples are only for the purpose of more clearly illustrating the technical solutions of the present invention and are therefore only exemplary and not intended to limit the scope of protection of the present invention.
A stomach tube for measuring chest cavity pressure, includes host computer 1 and aerating device 7, still includes: a respiratory gas measuring component 6, a measuring stomach tube and a nostril guiding tube.
As shown in fig. 2, one end of the gastric tube is measured and passed through the nostril guiding tube into the esophagus, and the esophageal pressure is monitored. The other end of the measuring gastric tube is connected with the inflation device 7, and the measuring gastric tube is in communication connection with the upper computer 1. Measuring a gastric tube includes: the cardiac obstruction tube 2, the interval monitoring tube 3, the monitoring interval determining tube 4, the connecting bottom plate 5, the cardiac air bag 23, the monitoring device, the obstruction tube movable port and the interval determining air bag 42.
One end of the cardiac blocking tube 2 is inserted into the cardiac position through the nostril guiding tube. The monitoring interval determining tube 4 is sleeved outside the cardiac blocking tube 2, is connected with the cardiac blocking tube 2 in a sliding way and is inserted into the esophagus. The interval monitoring sleeve is arranged outside the cardiac obstruction tube 2 and in the monitoring interval determining tube 4 and is used for collecting the esophageal air pressure between the cardiac obstruction tube 2 and the monitoring interval determining tube 4. A monitoring space 31 is formed between the cardiac obstruction tube 2 and the interval monitoring tube 3. The cardiac airbag 23 is mounted on the end of the cardiac occlusion tube 2 at the cardiac site for occluding the cardiac. The section determining balloon 42 is installed at one end of the section determining tube located in the esophagus and fixedly connected with the end of the monitoring section determining tube 4, and the section monitoring determining tube and the monitoring section determining tube 4 are connected into a whole to form an upper plugging space 41. The other end of the cardiac obstruction tube 2 is connected with an inflator 7. The inflator 7 is also in communication with the monitoring space 31 and the upper blocking space 41. The gastric cardia is blocked by the cardiac airbag 23, so that the stomach and the esophagus are spatially divided, then the interval determination airbag 42 is used to form a barrier in the esophagus, a tested space formed by the esophagus wall, the cardiac airbag 23 and the interval determination airbag 42 is formed, and the space is generally positioned in the esophagus and is close to 1/3 of the stomach, so that the monitoring of the esophageal pressure and the monitoring of the chest pressure can be realized by monitoring the air pressure change in the tested space.
The length of the monitoring section determining tube 4 is smaller than the length of the section monitoring tube 3, so that the section determining balloon 42 can be expanded toward the esophageal wall in an inflated state. The interval 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 type 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 in sliding connection with the cardiac obstruction tube 2. The sliding end 32 is provided with a plurality of ventilation holes, so that the monitoring space 31 is communicated with the esophagus.
The cardiac blanking tube 2 is further provided with a limiting ring 21, and the limiting ring 21 is located at an overlapping section of the interval monitoring tube 3 and the cardiac blanking tube 2 and used for limiting the maximum sliding distance of the sliding end 32. The one end that the stifled pipe of cardiac 2 was located cardiac department is provided with toper and advances head 22, and toper advances head 22 and the tip fixed connection of stifled pipe of cardiac 2, and toper advances head 22 is cavity structure, has offered the through-hole at the point of toper advances head 22 simultaneously. The cardiac airbag 23 is sleeved on the conical tappet 22 and is fixedly connected with the conical tappet 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.
Because the measuring gastric tube in this application is formed by many tube sets of different length, so the unavoidable ladder that exists, so the measuring gastric tube of this constitution is very easy to cause the damage to the esophagus wall at the in-process that gets into the esophagus, so sliding end 32 and toper tappet 22 have been designed. Therefore, in the stage of arranging the measuring gastric tube, the sliding end 32 is contacted with the conical tappet 22, and the connecting bottom plate 5 is pushed outside at the moment, so that the measuring gastric tube can safely and smoothly enter the preset position.
As shown in fig. 3, the connection bottom plate 5 is located at the other end of the monitoring section determining tube 4, is fixedly connected to the ends of the monitoring section determining tube 4 and the section monitoring tube 3, and connects the ends of the section detecting tube and the monitoring section determining tube 4 together. The movable opening of the cardiac obstruction tube is a through hole formed in the middle of the connecting bottom plate 5, and the other end of the cardiac obstruction tube 2 extends out, so that the cardiac obstruction tube 2 can slide in the movable opening of the obstruction tube. The side wall of the movable port of the cardiac obstruction tube is provided with a sealing air bag 51, and the sealing air bag 51 is communicated with the inflating device 7 and is used for forming a sealing environment for the monitoring area of the cardiac obstruction tube 2.
When the gastric tube is not arranged, the sealing air bag 51 is in a shrinking state, the sealing air bag 51 does not contact with the cardiac obstruction tube 2 at the moment, and the cardiac obstruction tube 2 can slide with the interval monitoring tube 3 at the moment. Therefore, when the cardiac valve tube 2 is arranged, after the conical tappet 22 reaches a certain position, a certain amount of gas is filled into the cardiac valve tube 2 through the inflator 7, so that the cardiac balloon 23 is inflated to a certain degree. Then, the cardiac blocking tube 2 is pulled, so that the cardiac airbag 23 is blocked at the cardiac orifice, and at the moment, the cardiac blocking tube 2 is pulled, so that the cardiac airbag has obvious resistance. Then, the connection base plate 5 is pulled, so that the sliding end 32 slides on the cardiac blanking tube 2, and the cardiac airbag 23 can be attached to the cardiac orifice more compactly under the influence of friction force. Until the slide end 32 comes into contact with the retainer ring 21, a drag sensation upon pulling also occurs.
Then, the space 41 is blocked up by the inflator 7 to inflate the section determining balloon 42 and to generate a certain pressure on the esophageal wall, and this pressure does not need to be too great, as long as it can prevent the gas in the tested space from overflowing between the esophageal wall and the section determining balloon 42, and the pressure value can be observed by the monitoring device. So that when the interval determination balloon 42 is inflated to a certain extent, measurement of the placement of the gastric tube in the esophagus is completed. The sealing balloon 51 is then inflated by the inflator 7, so that the sealing balloon 51 is inflated and the cardiac obstruction tube 2 positioned at the inner periphery of the sealing balloon 51 is fixed and the monitoring space 31 is sealed.
As shown in fig. 1, the monitoring device is mounted on the connection base plate 5, communicates with the upper plugging space 41 and the monitoring space 31, and is connected with 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 arranged on the connecting bottom plate 5 and communicated with the upper plugging space 41 and 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 arranged on the connecting bottom plate 5 and communicated with the upper blocking space 41, and is used for discharging the air in the upper blocking space 41. The second air pressure sensor is installed on the connecting bottom plate 5, communicated with the monitoring space 31, used for detecting air pressure in the monitoring space 31 and connected with the upper computer 1 in a communication mode. The air intake pipe 52 is mounted on the connection base plate 5 in communication with the monitoring space 31. A micro electromagnetic air valve 53 is installed in the air inlet pipe 52 and is in communication connection with the upper computer 1 for closing the air inlet pipe 52.
Therefore, after the gastric tube arrangement measurement is completed, the gastric tube arrangement measurement enters a monitoring calibration stage, at the moment, a tested person actively inhales, at the moment, the respiratory gas measurement assembly 6 starts to transport gas, and when the maximum value reached by the gas exchange quantity is monitored, the upper computer 1 controls the micro electromagnetic air valve 53 to be closed, so that a completely sealed space is formed between the monitoring space 31 and the tested space, and the calibration is completed. And then, along with the respiration of a tested person, the change of the chest pressure further influences the change of the air pressure in the tested space, and the change value is transmitted to the upper computer 1 for processing through the second air pressure sensor.
Of course, in this application, the air pressure monitoring sensor and the air release valve in the cardiac air bag 23 and the cardiac obstruction tube 2 are also present, but the setting position and the connection relationship thereof are all conventional operations of those skilled in the art, so no further description is made, and all aims to alleviate the pain to be measured, avoid the occurrence of more sequelae and control accuracy. The maximum air pressure and the minimum air pressure in each air bag are related to the characteristics of the air bags arranged in actual operation, and the air bags need to be set according to the characteristics of the adopted air bags, so that the air bags are not set too much in the application.
As shown in fig. 4, the respiratory gas measuring component 6 is in communication connection with the upper computer 1 and is used for monitoring the ventilation during respiration. The respiratory gas measuring component 6 is mainly used for monitoring the gas exchange quantity of the testee when breathing, so that the device for measuring the respiratory gas is arranged according to the environment, such as the environment where the testee is located, and the existing device for measuring the respiratory gas is used when the device can be matched with a gastric tube for measuring the respiratory gas.
If there is no device that can function to measure the respiratory amount or cannot be used with a gastric tube in the subject's environment, the respiratory amount measuring module 6 described below can be used.
The respiratory gas amount measurement assembly 6 includes: a mask 61, a vent 62, a gas flow sensor, and a pilot tube through hole 63. The mask 61 is used to wrap around the nose and mouth and is fixed to the head of the subject. A vent 62 is provided in the mask 61 for allowing the internal and external spaces of the mask 61 to communicate. The gas flow sensor is installed in the vent 62, and is connected to the host computer 1 in communication, and is used for measuring the gas exchange amount during respiration. The guide tube is a through hole formed on the face mask 61 for inserting the nostril guide tube. The nostril guide tube prevents the guide tube through-hole 63 from leaking air when the nose is inserted through the guide tube through-hole 63. In practical use, the air vent 62 can be provided with equipment which is matched with other air supply equipment, so that a tested person can still measure the esophageal pressure under special conditions.
As shown in fig. 5, the nostril guiding tube is used for insertion into nostril, and plays a guiding role. The nostril guiding tube consists of a sealing disc 8 and a conical hollow tube 9. Wherein the sealing disk 8 is annular, then the large end of the conical hollow tube 9 is fixedly connected with the sealing disk 8, and the small end of the conical hollow tube 9 is used for being inserted into nostrils. Because the nostril rear section of the human body is thin and sensitive, the rejection phenomenon of sneezing or nasal discharge can be caused in the process of stretching the measuring gastric tube, and a large amount of bacteria exist in the nostril, so the measuring gastric tube is directly stretched into the esophagus through the nostril, the bacteria possibly adhered to the nasal cavity on the measuring gastric tube in the process of arranging the measuring catheter can be caused, and the risk of esophageal infection exists for a tested person. Simultaneously measure the stomach tube and all be longer, so when arranging, measure the stomach tube and can move always in the nostril, and then can arouse that the testee appears sneezing etc. the rejection of health and react, carry out the arrangement that influences measuring the stomach tube, so this application a stomach tube for measuring thorax supporting disposable nostril guide tube that has, when using, insert nostril guide tube in the nostril earlier, then insert measuring the stomach tube in the esophagus through nostril guide tube, can avoid the testee to appear sneezing etc. and influence the problem of measuring the stomach tube arrangement to also can avoid the risk of esophagus infection.
When the nostril guide tube is matched with the mask 61, the space in the mask 61 can be partitioned, and the guide channel on the mask 61 can be sealed by the sealing disc 8, so that the breathing gas quantity obtained by final measurement is more accurate.
The invention is to abandon the conventional measurement of the esophageal pressure by 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, the multilayer structure of the invention needs to realize higher sensitivity, so that the esophageal wall is required to be greatly pressed, and further, great pain is brought to a testee, and monitoring sequela can exist, so that the esophageal pressure is measured by the air pressure change in the esophagus, which is close to 1/3 of the stomach, the pain of a patient is greatly relieved, meanwhile, during the calibration, the conventional measurement, the patient is required to hold the breath at the end of inspiration and gradually inflate the air bag, the time is longer, the calibration result is slightly lower than the actual value, and the testee is also brought great uncomfortable feeling, so that the miniature electromagnetic air valve 53 is controlled to be closed for calibrating the esophageal pressure when the gas exchange quantity reaches the maximum when the testee is monitored, the pain of the testee is greatly relieved when the testee is received, and the actual value is close to the actual result is gradually relieved.
The above embodiments are only for illustrating the technical solution of the present invention, and are not limiting. While the invention has been described in detail with reference to the foregoing embodiments, it will be appreciated by those of ordinary skill in the art that: the technical scheme described in the foregoing embodiments may be modified or some or all of the technical features may be replaced with equivalents. Such modifications and substitutions do not depart from the spirit of the invention and the scope of the embodiments, which are intended to be covered by the claims and specification.
Claims (9)
1. A stomach tube for measuring chest cavity pressure, includes host computer and aerating device, its characterized in that still includes:
the breathing gas measuring assembly is in communication connection with the upper computer and is used for monitoring the ventilation during breathing;
the nostril guide tube is used for being inserted into nostrils to play a guide role;
measuring the gastric tube, wherein one end of the gastric tube passes through the nostril guide tube and enters the esophagus to monitor the esophageal pressure;
the other end of the measuring gastric tube is connected with the inflation device, and the measuring gastric tube is in communication connection with the upper computer;
the measuring gastric tube comprises:
the cardiac blocking tube, one end of which passes through the nostril guiding tube and is inserted into the cardiac position;
the monitoring interval determining tube is sleeved outside the cardiac blocking tube, is connected with the cardiac blocking tube in a sliding way and is inserted into the esophagus;
the interval monitoring tube is sleeved outside the cardiac blockage tube and is positioned in the monitoring interval determining tube and used for collecting esophageal air pressure between the cardiac blockage tube and the monitoring interval determining tube;
the connecting bottom plate is positioned at the other end of the monitoring interval determining pipe, is fixedly connected with the ends of the monitoring interval determining pipe and the interval monitoring pipe, and is used for connecting the ends of the interval detecting pipe and the monitoring interval determining pipe together;
the movable opening of the cardiac plugging tube is a through hole formed in the middle of the connecting bottom plate and is used for extending out of the other end of the cardiac plugging tube, so that the cardiac plugging tube can slide in the movable opening of the plugging tube;
a monitoring space is formed between the cardiac blocking pipe and the interval monitoring pipe;
the cardiac airbag is arranged at the end part of the cardiac blocking pipe, which is positioned at the cardiac position, and is used for blocking the cardiac;
the interval determining air bag is arranged at one end of the interval determining pipe, which is positioned in the esophagus, and is fixedly connected with the end part of the monitoring interval determining pipe, and the interval monitoring determining pipe and the monitoring interval determining pipe 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 cardiac blocking pipe is connected with an air charging device;
the air charging device is also communicated with the monitoring space and the upper plugging space.
2. The gastric tube for measuring chest cavity pressure according to claim 1, wherein the side wall of the tube blocking movable port is provided with a sealing air bag, and the sealing air bag is communicated with the inflating device and is used for forming a sealing environment for the cardiac tube blocking monitoring area.
3. A gastric tube for measuring chest cavity pressure according to claim 2, wherein the length of the monitoring section determining tube is smaller than the length of the section monitoring tube, such that the section determining balloon can be expanded in the direction of the esophageal wall in an inflated state.
4. A gastric tube for measuring chest cavity pressure according to claim 3, wherein a sliding end is arranged at one end of the interval monitoring tube positioned 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 in sliding connection with the cardiac blocking tube; the sliding end is provided with a plurality of vent holes, so that the monitoring space is communicated with the esophagus.
5. A gastric tube for measuring chest cavity pressure as recited in claim 4, wherein the cardiac blanking tube is further provided with a stop ring, and the stop ring is located at an overlapping section of the interval monitor tube and the cardiac blanking tube for limiting a maximum sliding distance of the sliding end.
6. The gastric tube for measuring chest cavity pressure according to claim 4, wherein a conical tappet is arranged at one end of the cardiac plug tube at the cardiac site, the conical tappet is fixedly connected with the end of the cardiac plug tube, the conical tappet is of a cavity structure, and a through hole is formed in the tip of the conical tappet; the cardiac airbag is sleeved on the conical tappet and is fixedly connected with the conical tappet.
7. A gastric tube for measuring chest cavity pressure as claimed in claim 6 wherein the small end diameter of the sliding end is the same as the diameter of the tail end of the tapered tappet.
8. A gastric tube for measuring chest cavity pressure according to claim 1, wherein said monitoring means comprises:
the first air pressure sensor is arranged on the connecting bottom plate and communicated with the upper plugging space and is used for monitoring the air pressure of the upper plugging space and is in communication connection with the upper computer;
the first air escape valve is arranged on the connecting bottom plate and communicated with the upper plugging space and is used for exhausting the air in the upper plugging space;
the second air pressure sensor is arranged on the connecting bottom plate and communicated with the monitoring space, and 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.
9. A gastric tube for measuring chest cavity pressure as claimed in claim 1 wherein said respiratory gas measurement assembly comprises:
the mask is used for wrapping the mouth and nose and is fixed on the head of the tested person;
the air vent is arranged on the mask and is used for circulating the inner space and the outer space of the mask;
the gas flow sensor is arranged in the air vent, is in communication connection with the upper computer and is used for measuring the gas exchange amount during breathing;
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 a nose through the guide tube through hole, the guide tube through hole can be prevented from leaking air.
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| CN202011249727.5A CN112244808B (en) | 2020-11-10 | 2020-11-10 | Stomach tube for measuring chest cavity pressure |
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| CN202011249727.5A CN112244808B (en) | 2020-11-10 | 2020-11-10 | Stomach tube for measuring chest cavity pressure |
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| CN112244808B true CN112244808B (en) | 2024-02-20 |
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| CN112244808A (en) | 2021-01-22 |
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