CN211986460U

CN211986460U - Device for controlling and observing gas flow in medical equipment and thoracic drainage device

Info

Publication number: CN211986460U
Application number: CN202020089389.2U
Authority: CN
Inventors: 桑修勇; 曹海军
Original assignee: Ningbo Xinwell Medical Technology Co Ltd
Current assignee: Ningbo Xinwell Medical Technology Co Ltd
Priority date: 2020-01-15
Filing date: 2020-01-15
Publication date: 2020-11-24
Anticipated expiration: 2030-01-15

Abstract

A device for controlling and observing gas flow in medical equipment and a thoracic drainage device comprise a dry sealing valve and a gas leakage observation device, wherein the dry sealing valve is in one-way conduction and can control the direction and the time of gas flow. The gas leakage observation device has a second sealing body which can move under the action of the air pressure in a gas channel, and the movable state of the second sealing body can be observed from the outside of the gas leakage observation device so as to observe the gas flowing condition, such as whether gas flows or not.

Description

Device for controlling and observing gas flow in medical equipment and thoracic drainage device

Technical Field

The application relates to the field of medical instruments, in particular to a device for controlling and observing gas flow in medical equipment.

Background

A chest drainage device is a device used to drain fluids and gases from the chest of a patient. The disposable thoracic drainage device that present hospital used, the majority all is the water seal formula, seals up with water, and isolated with patient's thorax and outside air, prevent that outside air from entering into patient's thorax.

When the water-sealed thoracic drainage device is used, sterile water needs to be filled into a water-sealed cavity of the thoracic drainage device. This results in a limitation of the device when used in environments where water cannot be taken or added, and also increases the workload of the medical staff. Meanwhile, the water-sealed thoracic drainage device is large in size and inconvenient to carry. In the process that the patient needs to get off the bed for activity in the later recovery period, water in the water sealing cavity can cause water sealing failure due to the fact that the bottle body inclines or falls down, the chest cavity of the patient is directly communicated with the external atmosphere, and pneumothorax is caused or chest cavity infection is caused.

Disclosure of Invention

The present application provides a device for controlling and observing the flow of gas in a medical apparatus, which employs a thoracic drainage device of the device for controlling and observing the flow of gas, so as to control the flow of gas and observe the flow condition of gas.

In one embodiment, the present application provides an apparatus for controlling and observing gas flow in a medical device, comprising:

a housing having a cavity;

the dry sealing valve is provided with a first channel and a first sealing body, wherein the first channel is used for gas to pass through, the first channel is communicated with the cavity, and the first sealing body is arranged on the first channel in a one-way conduction mode and used for enabling the first channel to be in one-way conduction;

and a gas leakage observation device having a gas passage and a second sealing body, the gas passage being in sealed communication with one end of the first passage, the second sealing body being provided on the gas passage so as to be movable under the action of the gas pressure in the gas passage, the movable state of the second sealing body being observable from the outside of the gas leakage observation device, so that the gas flow condition is observed.

In one embodiment, the gas leakage observation device comprises a piston seat and a piston as a second sealing body, the piston seat is provided with a second channel as the gas channel, the piston is arranged in the second channel, the second channel is provided with a narrow section and a wide section communicated with the narrow section, the narrow section and the wide section are arranged from inside to outside, the piston is in sealing fit with the narrow section, the piston can move towards the wide section under the action of gas pressure in the second channel, and the inner diameter of the wide section is larger than the outer diameter of the piston, so that gas can be discharged from a gap between the piston and the wide section.

In one embodiment, the piston seat is made at least partially of a transparent material to show the motion state of the piston.

In one embodiment, the gas leakage observing apparatus further includes a piston cover covering a side of the wide section of the second passage to prevent the piston from falling off the side of the wide section, and the piston cover has a gas hole for discharging the gas in the second passage.

In one embodiment, the gas leakage observation device includes a baffle plate having a connection port as the gas passage and a diaphragm as the second sealing body, the diaphragm sealing the connection port and being attached to the baffle plate so as to be capable of unidirectional conduction in the same direction as the first sealing body.

In one embodiment, the gas leakage observation device is provided with a baffle, a diaphragm serving as a second sealing body and a fixing frame, the fixing frame is hermetically installed at a connecting port of the baffle, the fixing frame is provided with a third channel serving as a gas channel, the third channel is hermetically communicated with a first channel of the dry sealing valve, and the diaphragm seals the third channel and is installed on the fixing frame in a one-way communication mode in the same direction as the first sealing body.

In one embodiment, the number of the gas leakage observation devices is at least two, the gas leakage observation devices are all communicated with the first channel, and different gas leakage observation devices have different pressure thresholds, so that the different gas leakage observation devices are opened based on the difference of the pressure values in the liquid accumulation cavity.

In one embodiment, the dry seal valve includes a valve seat and a first seal body, the first passage being disposed on the valve seat; the first sealing body is a sealing sheet.

In one embodiment, the housing has an exhaust port, the exhaust port communicates with the cavity through an exhaust passage, and the dry sealing valve and the gas leakage observing device are in sealed communication in the exhaust passage.

An embodiment of the application provides a thoracic drainage device, include as above any one the device that control and observation gas flow, the cavity of casing is the hydrops chamber, dry-sealed valve and gas leakage observation device all with the hydrops chamber intercommunication for control and the gaseous discharge condition in observation patient's thoracic cavity.

The device for controlling and observing gas flow according to the above embodiment comprises the dry sealing valve and the gas leakage observing device, wherein the dry sealing valve is in one-way conduction, and the direction and the time of gas flow can be controlled. The gas leakage observation device has a second sealing body which can move under the action of the air pressure in a gas channel, and the movable state of the second sealing body can be observed from the outside of the gas leakage observation device so as to observe the gas flowing condition, such as whether gas flows or not.

Drawings

FIG. 1 is a front view of a chest drainage device in accordance with an embodiment of the present application;

FIG. 2 is a rear view of the chest drainage device in an embodiment of the present application;

FIG. 3 is a side view of a chest drainage device in accordance with an embodiment of the present application;

FIG. 4 is a top view of a chest drainage device in accordance with an embodiment of the present application;

FIG. 5 is a perspective view of a chest drainage device in accordance with an embodiment of the present application;

FIG. 6 is a schematic structural diagram of a bottom case according to an embodiment of the present application;

FIG. 7 is a schematic view of the chest drainage device with the front cover omitted in accordance with an embodiment of the present application;

FIG. 8 is a cross-sectional view of the structure shown in FIG. 7;

FIG. 9 is a cross-sectional view of an embodiment of the present application at a dry seal valve;

FIG. 10 is a schematic view of the cross-sectional view of FIG. 7 with the front cover attached;

FIG. 11 is an exploded view of a gas leak observation device according to an embodiment of the present application;

fig. 12 and 13 are sectional views of the gas leakage observation device shown in fig. 11 in a closed and opened state, respectively;

FIG. 14 is a schematic view showing the structure of a gas leakage observing apparatus according to another embodiment of the present application;

FIG. 15 is an exploded view of the gas leak observation device shown in FIG. 14;

fig. 16 is a sectional view of the gas leakage observation device shown in fig. 14;

FIG. 17 is an exploded view of a gas leak observation device according to another embodiment of the present application;

fig. 18 is a sectional view of the gas leakage observation device shown in fig. 17;

FIG. 19 is a schematic view showing the structure of a gas leakage observing apparatus according to another embodiment of the present application;

fig. 20 is a sectional view of the gas leakage observation device shown in fig. 19;

FIG. 21 is a schematic view showing the structure of a gas leakage observing apparatus according to another embodiment of the present application;

FIG. 22 is a schematic view showing the structure of a gas leakage observing apparatus according to another embodiment of the present application;

FIG. 23 is an exploded view of the gas leak observation device shown in FIG. 22;

fig. 24 is a sectional view of the gas leakage observation device shown in fig. 23;

FIGS. 25 and 26 are cross-sectional views of a manual negative pressure release device in a closed and open position, respectively, according to an embodiment of the present application;

fig. 27 is a schematic structural view of a harness (in a stowed state) according to an embodiment of the present application.

Detailed Description

The present invention will be described in further detail with reference to the following detailed description and accompanying drawings. Wherein like elements in different embodiments are numbered with like associated elements. In the following description, numerous details are set forth in order to provide a better understanding of the present application. However, those skilled in the art will readily recognize that some of the features may be omitted or replaced with other elements, materials, methods in different instances. In some instances, certain operations related to the present application have not been shown or described in detail in order to avoid obscuring the core of the present application from excessive description, and it is not necessary for those skilled in the art to describe these operations in detail, so that they may be fully understood from the description in the specification and the general knowledge in the art.

Furthermore, the features, operations, or characteristics described in the specification may be combined in any suitable manner to form various embodiments. Also, the various steps or actions in the method descriptions may be transposed or transposed in order, as will be apparent to one of ordinary skill in the art. Thus, the various sequences in the specification and drawings are for the purpose of describing certain embodiments only and are not intended to imply a required sequence unless otherwise indicated where such sequence must be followed.

The numbering of the components as such, e.g., "first", "second", etc., is used herein only to distinguish the objects as described, and does not have any sequential or technical meaning. The term "connected" and "coupled" when used in this application, unless otherwise indicated, includes both direct and indirect connections (couplings).

The embodiment provides a device for controlling and observing gas flow in medical equipment, which can be used in the medical equipment for controlling and observing gas flow. The apparatus for controlling and observing gas flow includes a housing, a dry seal valve, and a gas leak observation apparatus.

The shell is provided with a cavity, the dry sealing valve is provided with a first channel and a first sealing body, the first channel is used for gas to pass through, and the first channel is communicated with the cavity to control the discharge of the gas in the cavity. The first sealing body is arranged on the first channel in a one-way conduction mode and used for enabling the first channel to be in one-way conduction. The gas leakage observation device is provided with a gas channel and a second sealing body, wherein the gas channel is communicated with one end of the first channel in a sealing way. The sealing communication includes direct sealing and butt joint of the two, and also includes that the sealing communication of the two is realized by forming a sealing channel between the two through other components. The gas channel of the gas leakage observation device can be communicated with the gas outlet end of the first channel and also can be communicated with the gas inlet end of the first channel.

The second sealing body is arranged on the gas channel in a movable mode under the action of the air pressure in the gas channel, and the movable state of the second sealing body can be observed from the outer side of the gas leakage observation device so as to observe the gas flowing condition. The gas flow condition may be, for example, whether there is a gas flow, the rate of gas flow, etc.

The device for controlling and observing gas flow can be applied to gas flow structures of various medical devices for controlling and observing gas flow, for example, can be applied to a thoracic drainage device so as to discharge gas in the thoracic cavity of a patient and also facilitate observation of whether gas is discharged in the thoracic cavity of the patient after an operation.

In order to describe the structure of the apparatus for controlling and observing the flow of gas in more detail, a chest drainage apparatus is taken as an example, but it should be noted that the chest drainage apparatus is only one application object of the apparatus for controlling and observing the flow of gas, and the apparatus can also be applied to other apparatuses which need to control and observe the flow of gas.

Referring to fig. 1 to 10, in one embodiment, the chest drainage device comprises a housing 100 and means for controlling and observing the flow of gas including a dry seal valve 200 and a gas leak observation device 300.

The housing 100 has a drip chamber 101, a drainage port 102 and an exhaust port 103. The drainage port 102 communicates with the drip chamber 101 for draining fluid in the patient's chest cavity into the drip chamber 101. The drip chamber 101 is used to store fluid drained from the patient. A sealed exhaust passage 104 (shown in fig. 6) is provided between the exhaust port 103 and the liquid accumulation chamber 101. The exhaust port 103 communicates with the hydropneum 101 through an exhaust passage 104 for exhausting gas in the thoracic cavity of the patient. The air exhaust passage 104 communicates with the hydropneumatic chamber 101 through an air hole 1041 (refer to fig. 7). The dry sealing valve 200 has a one-way conduction structure from inside to outside, and is disposed in the exhaust passage 104 to conduct the exhaust passage 104 from inside to outside in one way. Specifically, the inside and the outside are referred to herein as the outside at the end of the exhaust passage 104 connected to the exhaust port 103, and the inside at the opposite end, from the inside to the outside, i.e., from the hydropneum 101 to the exhaust port 103.

The chest drainage device allows a patient to discharge air during expiration and blocks the communication between the atmosphere and the chest of the patient during inspiration. The thoracic drainage device does not need to be added with water when in use, and can be used in any occasions (such as war, rescue scene and other places where water taking and adding are inconvenient). The thoracic drainage device does not need to be provided with a water sealing cavity, so the volume is smaller. Meanwhile, the thoracic drainage device does not need to worry about the failure of water seal, and the direct communication between the patient thoracic cavity and the atmosphere to cause pneumothorax or thoracic infection is avoided.

The thoracic drainage device can be used for gravity drainage and negative pressure drainage. Typically, the patient has a large volume of fluid or gas in the chest cavity prior to surgery, and negative pressure aspiration may be used. When negative pressure drainage is used, the exhaust port 103 can be connected with negative pressure generating equipment, negative pressure is formed in the exhaust channel 104 and the hydrops cavity 101 in a suction mode and the like, and the dry sealing valve 200 is opened at the moment, so that the hydrops in the chest of the patient is drained. Generally, the patient can do through gravity drainage without negative pressure drainage in the later stage of operation recovery, namely hydrops in the chest of the patient flows into the hydrops cavity 101 under the action of gravity. The vent 103 may be used primarily to vent gas during gravity drainage, and may open the dry seal valve 200 when the pressure in the drip chamber 101 is greater than the pressure threshold of the dry seal valve 200. The pressure threshold of the dry sealing valve 200 is a critical point of the pressure value that can cause the dry sealing valve 200 to open, for example, in one embodiment, the pressure threshold is approximately equal to the ambient atmospheric pressure.

In this embodiment, the exhaust passage 104 may be a variety of regular or irregular chamber structures. In one embodiment, as shown in FIG. 6, the exhaust passage 104 is formed by a plurality of cavities communicating with each other. The specific shape of the cavities can be flexibly designed according to the shape and the placing position of each component in a specific structure.

In one embodiment, the dry sealing valve 200 can be any one-way valve commonly used and variations of the one-way valves. Referring to FIG. 9, in one embodiment, a dry sealing valve 200 includes a valve seat 210 and a first sealing body 220. A valve seat 210 is sealingly disposed within the exhaust passage 104. The valve seat 210 has a first passage 211 therethrough, and the exhaust passage 104 communicates with the first passage 211, so that the gas is exhausted through the first passage 211. The first sealing body 220 is installed in the first passage 211 in such a manner as to be unidirectionally conducted from the inside to the outside.

In the embodiment shown in FIG. 9, the first sealing body 220 is a sealing plate that is mounted on the valve seat 210. The first sealing body 220 may be any sealing structure, and is not limited to a sealing sheet.

Further, referring to fig. 7, the exhaust passage 104 has a dry-sealed valve cavity 1042. The dry seal valve chamber 1042 has a first inlet 1043 and a first outlet 1044. The dry seal valve 200 is installed in the dry seal valve cavity 1042 and separates the first inlet 1043 from the first outlet 1044. The first inlet 1043 and the first outlet 1044 are respectively communicated with both ends of the first passage 211. The gas is required to pass through the first channel 211 and then is exhausted from the first outlet 1044.

As shown in fig. 6, a partition 1045 may be disposed in the dry sealing valve cavity 1042 to divide the dry sealing cavity into two parts, and the dry sealing valve 200 is installed on the partition 1045 and is communicated with the spaces on both sides of the partition 1045.

In addition to such a dry sealing valve 200 as described above, various types of check valve structures may be employed.

Further, in this thorax drainage device use, the recovery condition of patient's operation later stage need be known at any time to some circumstances, judges whether there is gaseous exhaust, and medical personnel decide whether the patient can the radiography according to this judgement to whether come to confirm to pull out the pipe. In this regard, in one embodiment of the present application, a gas leakage observation device 300 is further included. The gas leakage observation device 300 has a second sealing body. The second sealing body is provided in the gas discharge passage 104 so as to be movable from the inside to the outside by the gas pressure in the gas passage hydrops chamber 101 (in the present embodiment, the gas passage communicates with the hydrops chamber 101, and the gas pressure is the same), and the movable state of the second sealing body can be observed from the outside of the housing 100, so that the gas leakage can be observed. Of course, the gas leakage observing device 300 has a pressure threshold a (i.e. a critical point of a pressure value for urging the gas leakage observing device 300 to open), i.e. the second sealing body is pushed to move only when the gas pressure reaches a certain threshold, the pressure threshold a of the gas leakage observing device 300 can be set according to the detection effect required in practice, for example, when the pressure threshold a of the gas leakage observing device 300 can be set between 0-20 cm of water (including 0 cm of water and 20 cm of water), the second sealing body of the gas leakage observing device 300 moves.

When gas (pneumothorax) exists in the chest cavity of the patient, the chest cavity gas is communicated with the hydrops cavity 101 at the tail end of the expiration of the patient, the pressure in the hydrops cavity 101 is larger than the pressure threshold value of the dry sealing valve 200, the dry sealing valve 200 is opened, and the gas enters the exhaust channel 104, so that the second sealing body is driven to move. By observing the active state of the second sealing body, whether the gas exists in the chest cavity of the patient can be judged.

In order to observe the active state of the second sealing body from the outside of the casing 100, and to observe the gas leakage, as shown in fig. 1, a portion (an observation window 105) of the casing 100 corresponding to the second sealing body may be made of a transparent material to show the active state of the second sealing body. Of course, if there are other components other than the housing 100 outside the second sealing body, the parts corresponding to the second sealing body among these components may be designed to be made of a transparent material so as not to obstruct the view of the second sealing body.

Further, referring to fig. 9 to 13, an embodiment provides a specific structure of a gas leakage observation device 300. The gas leakage observing apparatus 300 includes a piston holder 310 and a piston 320 as a second sealing body. The piston holder 310 has a second passage 311 as a gas passage, and the first passage 211 communicates with the second passage 311 via the exhaust passage 104. The piston 320 is disposed in the second passage 311. The second passage 311 has a narrow section 3111 and a wide section 3112 communicating with the narrow section 3111, and the narrow section 3111 and the wide section 3112 are disposed from inside to outside. The piston 320 is in sealing fit with the narrow section 3111, and the piston 320 can move to the wide section 3112 under the action of the air pressure in the liquid accumulation cavity 101, and the inner diameter of the wide section 3112 is larger than the outer diameter of the piston 320, so that the gas in the liquid accumulation cavity 101 can be discharged from the gap between the piston 320 and the wide section 3112.

Referring to fig. 12, normally, the piston 320 seals the second passage 311, and gas cannot be discharged from the second passage 311. When gas is present in the patient's chest (pneumothorax), the second seal is forced toward the wide section 3112, as shown in FIG. 13. Since the inner diameter of the wide section 3112 is larger than the outer diameter of the piston 320, the gas in the liquid accumulation chamber 101 can be discharged from the gap between the piston 320 and the wide section 3112. When the piston 320 is observed to move toward the wide section 3112, it is known that gas is being evacuated from the drip chamber 101. In one embodiment, the pressure threshold a for driving the piston 320 to move has a range of values: a is not less than 0 cm and not more than 20 cm.

In order to facilitate the demonstration of the motion state of the piston 320, at least a portion of the piston seat 310, especially a portion corresponding to the motion track of the piston 320, is made of a transparent material.

Referring to fig. 11 to 13, in an embodiment, the gas leakage observing apparatus 300 further includes a piston cover 330, and the piston cover 330 is covered on the side of the wide section 3112 of the second passage 311 to prevent the piston 320 from falling off from the side of the wide section 3112. The piston cap 330 has an air hole 331 for discharging air in the second passage 311.

In the embodiment illustrated in fig. 11-13, the piston 320 is a sphere, and in some other embodiments, the piston 320 may be a cylinder or other shape and configuration that accomplishes the above-described function.

Of course, the second sealing body is not limited to this mating arrangement of the piston 320 and the piston seat 310, and other arrangements are possible that allow the second sealing body to move under the air pressure of the drip chamber 101.

For example, referring to fig. 14-16, another gas leak observation device 300 is provided in one embodiment. In this embodiment, the gas leakage observing apparatus 300 includes a baffle 340, the baffle 340 blocks the exhaust passage 104, and the baffle 340 has a connection port 341. The exhaust passages 104 on both sides of the baffle plate 340 communicate through the connection ports 341 in the baffle plate 340. The gas leakage observation device 300 further includes a fixing frame 350 and a diaphragm 360 as a second sealing body. The fixing frame 350 is hermetically installed at the connection port 341 of the barrier 340. The fixing frame 350 has a third passage 352 as a gas passage, and the third passage 352 communicates with the exhaust passage 104. The diaphragm 360 is installed on the outside of the fixing frame 350 in such a manner as to be able to conduct in one direction from the inside to the outside, and seals the third passage 352. For example, the diaphragm 360 is mounted on the protrusion 351 of the fixing frame 350 (refer to fig. 15). When the gas in the drip chamber 101 rises to reach the pressure threshold of the diaphragm 360, the diaphragm 360 is urged to open outwardly. By observing the change in the diaphragm 360, it is known that there is gas venting. In one embodiment, the value range of the pressure threshold b for driving the diaphragm 360 to move is: b is not less than 0 cm and not more than 20 cm. In a preferred embodiment, the membrane has a thickness of less than or equal to 5 mm.

In order to ensure the sealing effect, a sealing ring 370 may be disposed between the fixing frame 350 and the connection port 341 of the blocking plate 340 for sealing.

Of course, referring to fig. 17 to 18, in another embodiment, the gas leakage observing apparatus 300 may omit the fixing frame 350, directly seal the connection port 341 with the membrane 360, and be installed on the outer side of the baffle 340 in a manner of one-way conduction from inside to outside. At this time, the connection port 341 serves as a gas passage of the gas leakage observation device 300. For example, diaphragm 360 is fixedly mounted to baffle 340. The baffle 340 may be provided with a protrusion 342 (see fig. 17), and one end of the diaphragm 360 is fastened to the protrusion 342.

By observing the active state of the second sealing body, it is possible to determine whether or not gas is discharged from a substantially qualitative perspective. In order to more accurately know the amount of the discharged gas, in some embodiments, the number of the gas leakage observation devices 300 is at least two, the gas leakage observation devices 300 are all communicated with the exhaust passage 104, and different gas leakage observation devices 300 have different pressure thresholds, so that different gas leakage observation devices 300 are opened based on the difference of the pressure values in the liquid accumulation chamber 101. Generally, a gas leak observation device 300 with a greater pressure threshold will be open for a greater gas flow.

For example, referring to fig. 19 and 20, in one embodiment, one piston seat 310 and one piston 320 are provided in one set, and more than two sets, such as three sets, are provided. The three sets of piston seats 310 and pistons 320 are arranged side by side, but with the respective second passages 311 spaced from one another. The second channels 311 of all piston seats 310 communicate with the exhaust channel 104 and the accumulation chamber 101. In the sets of piston holders 310 and pistons 320, the second passage 311 of each piston holder 310 has a different inner diameter, and the piston 320 has a different outer diameter, so that the pressure threshold of each piston 320 is different. During the venting, different movements of the piston 320 are triggered depending on the air pressure in the venting channel 104 and the drip chamber 101. By observing which set of pistons 320 move, the amount of exhaust gas flow can be identified. Of course, to avoid the piston 320 from sliding off the piston seat 310, a corresponding piston cover 330 may be disposed on each set of piston seats 310. In addition, in other embodiments, the pistons in each set of piston seats have the same outer diameter but different weights, which also allows each piston to have a different pressure threshold.

In another embodiment, referring to fig. 21, a shift position 370 can be further provided as a reference for the movement of the second sealing body, for example, fig. 21 shows four shift positions 370, where a shift position 0 indicates that the piston 320 is not moved, and shift positions 1-4 indicate the moving positions of the piston 320, where the larger the value, the larger the moving distance of the piston 320, and the larger the corresponding discharged gas flow rate. The shift position 370 may be provided on the piston holder 310, or may be provided on other components. The shift position 370 is usually located on one side of the piston 320, and may be located on the housing 100, for example, in addition to the piston seat 310, and preferably located at a position of the housing 100 corresponding to the motion track of the piston 320, so as to better serve as a reference for the moving position of the piston 320.

In addition to the piston 320, a plurality of sets of the gas leakage observation devices 300 may be provided in the case where the diaphragm 360 is used as the second sealing body. Referring to fig. 22 to 24, in an embodiment, the baffle 340 has at least two connection ports 341 (e.g., three connection ports 341), each connection port 341 has a different aperture, a different diaphragm 360 is disposed for each connection port 341, and the corresponding connection port 341 is sealed. Since the respective connection ports 341 have different diameters, the gas pressure for opening the respective diaphragms 360 is different, and the flow rates of the exhaust gas can be individually discharged according to the opening conditions of the respective diaphragms 360. Of course, in other embodiments, the port size may be the same, but the thickness or stiffness of the corresponding diaphragms 360 may be different, thereby allowing each diaphragm 360 to have a different pressure threshold.

Further, referring to fig. 7, in one embodiment, a gas leakage observing device 300 is disposed between the dry sealing valve 200 and the exhaust port 103. Of course, the gas leakage observation device 300 may be provided between the dry sealing valve 200 and the liquid accumulation chamber 101.

Further, referring to fig. 7, in an embodiment, the gas leakage observing device 300 is located on the upper side of the dry sealing valve 200. In order to facilitate the compact structure and reduce the volume of the whole device, in one embodiment, referring to fig. 6 and 7, the dry sealing valve 200 and the exhaust passage 104 are located above the hydropneumatic chamber 101.

Further, referring to fig. 5, 25 and 26, in an embodiment, the manual negative pressure releasing device 400 is further included, the housing 100 has a first pressure relief opening 105, the first pressure relief opening 105 is communicated with the liquid accumulation cavity 101 (directly or indirectly through other channels), the manual negative pressure releasing device 400 has a third sealing body 410 and an elastic member 420, the third sealing body 410 is used for sealing the first pressure relief opening 105, and the elastic member 420 acts on the third sealing body 410 to apply an elastic restoring force to the third sealing body 410 for driving the third sealing body 410 to seal the first pressure relief opening 105. The third sealing body 410 seals the first pressure relief opening 105, and may be implemented by directly sealing the first pressure relief opening 105 with the third sealing body 410, or may be implemented by sealing another pressure relief opening communicating with the first pressure relief opening 105. When the dropsy chamber 101 negative pressure is too high, the dropsy chamber 101 negative pressure can be reduced by manual release.

The manual negative pressure releasing device 400 comprises a sealing seat 430, the sealing seat 430 is used for sealing and covering a first pressure relief opening 105, the sealing seat 430 is provided with a second pressure relief opening 431, the second pressure relief opening 431 is communicated with the first pressure relief opening 105, a third sealing body 410 is arranged on the sealing seat 430 and extends out of the second pressure relief opening 431, and an elastic member 420 drives the third sealing body 410 to move towards the second pressure relief opening 431 and seal the second pressure relief opening 431.

In one embodiment, the manual negative pressure releasing device 400 further has a pressure relief valve seat 440, and the pressure relief valve seat 440 is inserted into the first pressure relief opening 105. The relief valve seat 440 is hollow in the middle for the passage of air. As shown in fig. 25, an elastic member 420 (e.g., a spring) is provided in a hollow portion of the relief valve seat 440 and abuts against the third sealing body 410 to push the third sealing body 410 toward the sealing seat 430, so as to seal the second relief port 431. As shown in fig. 26, when the third sealing body 410 is manually pressed, the third sealing body 410 overcomes the elastic restoring force of the elastic member 420 and extends downward into the pressure relief valve seat 440, so as to open the second pressure relief port 431, and at this time, the second pressure relief port 431 is directly or indirectly communicated with the hydropneumatic chamber 101 through the hollow portion of the pressure relief valve seat 440. A sealing ring 450 may be provided to seal between the pressure relief valve seat 440 and the housing 100.

In one embodiment, the third sealing body 410 is in a closed state when the negative pressure in the drip chamber 101 is below-40 KPa, and the second pressure relief opening 431 is opened when a maximum force of 15N is applied to the third sealing body 410.

Further, referring to fig. 1 and 7, in one embodiment, a negative pressure state display device 500 is further included for displaying a negative pressure state in the hydropneumatic chamber 101. So that an operator can visually and effectively display whether the negative pressure exists in the hydrops chamber 101. The housing 100 correspondingly has a negative pressure observation window 501 for observing the negative pressure display device 500.

Further, referring to fig. 7, in an embodiment, the vacuum cleaner further includes a high negative pressure automatic release device 600, and the high negative pressure automatic release device 600 is communicated with the hydrophyte chamber 101 and can be disposed in the exhaust passage 104. The high negative pressure automatic releasing device 600 is used for automatically releasing the negative pressure in the hydrops cavity 101 when the negative pressure in the hydrops cavity 101 exceeds a threshold value, and the negative pressure state display device 500 and the high negative pressure automatic releasing device 600 are both arranged above the hydrops cavity 101.

Further, referring to fig. 4, in one embodiment, the apparatus further includes a positive pressure releasing device 700, where the positive pressure releasing device 700 is connected to the hydropneumatic chamber 101 and is used for automatically releasing the gas in the hydropneumatic chamber 101 when the gas pressure in the hydropneumatic chamber 101 is higher than the external gas pressure. When the hydrops chamber 101 presents the positive pressure, the positive pressure relief valve can be opened automatically, releases the positive pressure to effectively ensure the chest pressure safety. In one embodiment, the positive pressure release device 700 has a positive pressure release film (flexible material). When the negative pressure drainage is performed, the bottle body is in a negative pressure state, the positive pressure release film is adsorbed on the shell 100, the positive pressure release device 700 is in a closed state, and if the positive pressure greater than 4cmH2o is generated in the hydropneumatic cavity 101 along with the respiration of other people, the positive pressure release film is separated from the shell 100, and the positive pressure is discharged.

Referring to fig. 1 to 5, in an embodiment, the housing 100 includes a front cover 110 and a bottom cover 120, and the front cover 110 and the bottom cover 120 enclose the housing 100. The front cover 110 and the bottom cover 120 may enclose the exhaust passage 104. Alternatively, the exhaust duct 104 may be separately provided on the front cover 110 or the bottom cover 120. One end of the front cover 110 protrudes from the bottom case 120, and the protruding portion of the front cover 110 forms a handle 111 for holding. Referring to fig. 3 and 27, in one embodiment, the housing 100 has a strap fastener 130 for mounting a strap 800. The strap 800 has a snap structure and can be snapped on the strap fastener 130. The patient can carry this thorax drainage device or carry this thorax drainage device on one's body with braces 800 through handle 111, and it is more convenient to move about, does not worry moreover because rock and lead to thorax drainage device leakproofness to lose efficacy.

Referring to fig. 1, in an embodiment, a liquid observation window 106 is further disposed on the housing 100 at a position corresponding to the dropsy chamber 101, so as to conveniently observe the amount of liquid in the dropsy chamber 101. The housing 100 may also be provided with a sample port for drawing a liquid sample, the sample port being provided with a plug 107 for closing the sample port.

Of course, in the chest drainage device shown above, the means for controlling and observing gas flow does not have a housing, but in other embodiments, the means for controlling and observing gas flow may also have a housing having an exhaust passage in which the dry seal valve and the gas leak observation device are in sealed communication, thereby achieving sealed interfacing of the dry seal valve and the gas leak observation device. The exhaust passage may employ, but is not limited to, the exhaust passage 104 shown in the above-described embodiment.

The present invention has been described in terms of specific examples, which are provided to aid understanding of the invention and are not intended to be limiting. For a person skilled in the art to which the invention pertains, several simple deductions, modifications or substitutions may be made according to the idea of the invention.

Claims

1. An apparatus for controlling and observing gas flow in a medical device, comprising:

a housing having a cavity;

2. The apparatus for controlling and observing the flow of gas according to claim 1, wherein the gas leakage observing apparatus comprises a piston holder having a second passage as the gas passage and a piston as a second sealing body disposed in the second passage, the second passage having a narrow section and a wide section communicating with the narrow section, the narrow section and the wide section being disposed from the inside to the outside, the piston being in sealing engagement with the narrow section, and the piston being movable toward the wide section by the pressure in the second passage, the wide section having an inner diameter larger than an outer diameter of the piston, so that the gas can be discharged from a gap between the piston and the wide section.

3. The apparatus for controlling and observing gas flow of claim 2, wherein the piston seat is at least partially made of a transparent material to exhibit the moving state of the piston.

4. The apparatus for controlling and observing gas flows of claim 2, wherein the gas leakage observing apparatus further comprises a piston cover which is shielded on one side of the wide section of the second passage to prevent the piston from falling off the one side of the wide section, the piston cover having a gas hole for discharging the gas in the second passage.

5. The apparatus for controlling and observing a gas flow according to claim 1, wherein the gas leakage observing apparatus has a baffle plate having a connection port as the gas passage and a diaphragm as the second sealing body, the diaphragm sealing the connection port and being attached to the baffle plate so as to be capable of unidirectional communication in the same direction as the first sealing body.

6. The apparatus for controlling and observing gas flow according to claim 1, wherein the gas leakage observing apparatus has a baffle, a diaphragm as a second sealing body, and a holder, the holder is sealingly installed at a joint of the baffle, the holder has a third passage as a gas passage, the third passage is in sealing communication with the first passage of the dry sealing valve, and the diaphragm seals the third passage and is installed on the holder in such a manner as to be capable of unidirectional communication in the same direction as the first sealing body.

7. The apparatus for controlling and observing gas flow of claim 1, wherein the gas leak observation apparatus is at least two or more, the gas leak observation apparatuses are all in communication with the first channel, different gas leak observation apparatuses have different pressure thresholds, such that different gas leak observation apparatuses are opened based on a difference in a pressure value in the drip chamber.

8. The apparatus for controlling and observing gas flow of claim 1, wherein the dry seal valve includes a valve seat and a first seal body, the first passageway being disposed on the valve seat; the first sealing body is a sealing sheet.

9. The apparatus for controlling and observing gas flow of claim 1, wherein the housing has a gas vent in communication with the cavity through a gas vent passage, the dry-sealed valve and the gas leak observation device being in sealed communication in the gas vent passage.

10. A chest drainage device including a means for controlling and observing the flow of gas as claimed in any one of claims 1 to 9, wherein the cavity of the housing is a hydropneumatic chamber and the dry seal valve and the gas leak observation means are both in communication with the hydropneumatic chamber for controlling and observing the removal of gas from the chest of a patient.