CN114652360B

CN114652360B - Alveolar lavage device

Info

Publication number: CN114652360B
Application number: CN202210099306.1A
Authority: CN
Inventors: 郭俊敏; 孙志飞; 高营营
Original assignee: Leo Medical Co ltd
Current assignee: Leo Medical Co ltd
Priority date: 2022-01-27
Filing date: 2022-01-27
Publication date: 2023-04-18
Anticipated expiration: 2042-01-27
Also published as: CN114652360A

Abstract

The invention relates to the technical field of medical instruments, and provides an alveolar lavage device, which comprises: the first end of the main body catheter forms a head part used for extending into a bronchus of a lung, a water injection and absorption flow channel group used for injecting water or absorbing water is arranged in the main body catheter, the water injection and absorption flow channel group extends into the head part, and the head part is provided with an opening communicated with flow channels of the water injection and absorption flow channel group; the main body catheter is used for penetrating through a working cavity channel of a bronchoscope so that the head part extends into a lung bronchus; and the connecting assembly is arranged at the second end of the main body conduit and is used for communicating the second end of the main body conduit with the water injection and absorption device. Above-mentioned alveolar lavage device is in the use, because the head of main part pipe can directly stretch into the depths of the bronchus that corresponds, consequently, when the lavage operation, can carry out accurate lavage to corresponding alveolus, reduces the risk that the washing liquid got into other bronchus to reduce the pollution risk.

Description

Alveolar lavage device

Technical Field

The present disclosure relates to the technical field of medical equipment, and in particular to an alveolar lavage device.

Background

Bronchoalveolar lavage is a non-invasive procedure performed through a bronchoscope and has been widely accepted in disease diagnosis. By injecting sufficient lavage fluid into alveolus and fully sucking, important information of bronchoalveolar lavage fluid at the level of alveolus, such as immune cell, inflammatory cell, cytology and infectious microbe pathogeny information, is obtained, and diagnosis, disease observation and prognosis of respiratory diseases are assisted.

Although alveolar precise irrigation has more clinical expectation benefit, the alveolar precise irrigation technology is not developed correspondingly due to the lack of corresponding equipment in the technical field of current medical equipment.

Therefore, it is an urgent technical problem to be solved by those skilled in the art to provide an alveolar lavage device capable of accurately irrigating alveoli.

Disclosure of Invention

In view of the above-mentioned drawbacks and deficiencies of the prior art, the present application is directed to an alveolar lavage device that can be inserted into the corresponding sub-bronchial tubes of an alveolar region to be lavaged, and can perform precise lavaging on the corresponding alveoli. The specific scheme is as follows:

the present invention provides an alveolar lavage apparatus comprising:

the first end of the main body catheter forms a head part used for extending into a lung bronchus, an injection and suction water flow channel group used for injecting water or sucking water is arranged in the main body catheter, the injection and suction water flow channel group extends into the head part, and the head part is provided with an opening communicated with a flow channel of the injection and suction water flow channel group; the main body catheter is used for penetrating through a working cavity channel of a bronchoscope so as to enable the head to extend into a lung bronchus;

and the connecting assembly is arranged at the second end of the main body conduit and is used for communicating the second end of the main body conduit with the water injection and absorption device.

When the alveolar lavage device provided by the invention is used, the main body catheter is extended into the lung of a patient through the working cavity of the bronchoscope, and in the specific use process, the working cavity of the bronchoscope is extended into the trachea of the lung, at the moment, the head at the first end of the main body catheter is extended out of the end part of the working cavity of the bronchoscope and is further extended into a sub-segment bronchus to be lavaged, a doctor injects cleaning fluid into the corresponding bronchoalveolar through the water injection and absorption flow channel group in the main body catheter, the cleaning fluid is sprayed out through the opening at the head of the main body catheter to lavage the alveolus, and the doctor can suck the irrigated cleaning fluid through the opening at the head and the water injection and absorption flow channel group to further realize the lavage operation on the corresponding sub-segment bronchoalveolar.

Above-mentioned alveolar lavage device is in the use, because the head of main part pipe can directly stretch into corresponding sub-section bronchus depths, consequently, when the lavage operation, can carry out accurate lavage to corresponding alveolus, and can reduce the risk that the washing liquid got into other bronchus, reduce the pollution risk.

On the basis of the above technical solution, in a preferred implementation, the head has an opening including:

a top opening disposed at a top end of the head; and/or (c) and/or,

and the side opening is arranged on the pipe wall of the head part.

Preferably, the tube wall of the head is provided with 1-5 of the side openings.

Further preferably, the side opening of the tube wall of the head is provided with 1-3.

Preferably, the head tube wall is provided with one of the side openings, and the area of the side opening is 0.5 to 4 square millimeters. More preferably, the area of the side opening is 0.5-2 square millimeters.

On the basis of the above technical solution, in a preferred implementation manner, the tube wall of the head is provided with a plurality of side openings, and the side openings are distributed around the circumference of the head and are distributed at a certain interval in the axial direction of the head. When each lateral opening is used for water injection, when each lateral opening is distributed in the above mode, the spraying area of the head when the cleaning liquid is sprayed out can be increased, and the efficiency of the head in alveolar lavage of the corresponding bronchus can be further increased.

Preferably, each of the side openings is spaced from the tip of the head by a distance of 4cm or less, more preferably 2cm or less, and most preferably 1cm or less, in the axial direction of the head.

Preferably, in the axial direction of the head, the side opening area closest to the head is not smaller than the remaining side openings.

On the basis of the above technical solution, in a preferred implementation manner, the head has an opening including a top opening disposed at a top end of the head, and a diameter of the top opening is 0.3-2mm, and more preferably 0.5-1.5mm.

On the basis of the technical scheme, in a preferable implementation manner, the injection and suction water flow channel group comprises at least one flow channel, the area of each flow channel in the injection and suction water flow channel group is greater than or equal to 0.8 square millimeter, and the outer diameter of the main body conduit is 1.0-3mm.

Preferably, the water injection and absorption flow channel group comprises a water injection flow channel and a water absorption flow channel, the top opening is communicated with the water injection flow channel and the water absorption flow channel, and the side opening is communicated with the water injection flow channel and/or the water absorption flow channel. Among the above-mentioned technical scheme, water injection runner and water absorption runner set up alone, and the water injection runner can play the effect of tonifying qi at the in-process that carries out the suction through the water absorption runner, can also carry out the continuous operation of edge-filling water limit suction under the settlement circumstances, and the mutual influence between water injection process and the suction process is less.

In a preferred structure, in the head of the main body conduit, along the axis direction of the head, the length of the water injection flow channel is greater than that of the water absorption flow channel, the end part of the water absorption flow channel is in an oblique opening shape, the end surface of the opening is in smooth transition with the pipe wall of the water injection flow channel, and the side wall of the water absorption flow channel is provided with the side opening. In the structure, one part of the head part is only provided with the water injection flow passage, and the radial size of the part of the head part can be smaller, so that the top of the head part forms a tip structure, the water injection flow passage can be more deeply inserted into the corresponding bronchus, and the lavage effect is further improved.

In another preferred structure, a water cavity is arranged in the head part of the main body conduit, the top opening is communicated with the water cavity, and the end part of the water injection flow passage and the end part of the water absorption flow passage are both communicated with the water cavity. In the above scheme, the water injection flow channel and the water absorption flow channel share one top opening, so that the structure of the top end of the head is facilitated to be simplified, and the size of the top end of the head is reduced.

Preferably, the connecting assembly comprises a first interface, a second interface, a third interface, a fourth interface and a valve core, wherein the first interface is a water filling port, the second interface is a water suction port, the third interface is communicated with the water filling flow channel and the first interface, the fourth interface is communicated with the water suction flow channel and the second interface, and the valve core is used for controlling the connection and disconnection between the first interface and the third interface and between the second interface and the fourth interface when acting.

Preferably, the head portion is provided with an identification mechanism for marking the opening position information.

Preferably, the end of the head is provided with a soft buffer head structure.

Preferably, the liquid collecting device comprises a liquid collecting bottle and a low negative pressure device, wherein the liquid collecting bottle is provided with a first connecting pipe and a second connecting pipe, the liquid collecting bottle is communicated with the connecting assembly through the first connecting pipe, and the liquid collecting bottle is communicated with the low negative pressure device through the second connecting pipe.

Drawings

Other features, objects and advantages of the present application will become more apparent upon reading of the following detailed description of non-limiting embodiments thereof, made with reference to the accompanying drawings in which:

FIG. 1 is a schematic view of an alveolar lavage apparatus provided in an embodiment of the present application;

FIG. 2a is a schematic view of a use scenario of an alveolar lavage device provided in the present application;

FIG. 2b is a schematic view of the head of a main catheter extending into a bronchial tube in an alveolar lavage apparatus of the present application;

FIG. 3a is a state diagram of a bronchoscope only used for lavage;

FIG. 3b is a schematic view of the head of the main catheter being filled with water while performing an irrigation using the alveolar irrigation device provided in the embodiments of the present application;

FIG. 4 is a schematic view of the flow direction of the fluid during water injection and suction when the water injection and suction channel set of the main catheter of the alveolar lavage device provided by the embodiment of the present application includes only one channel;

FIG. 5a is a schematic view of a main catheter water injection channel set including a water injection channel and a water suction channel in an alveolar lavage apparatus according to an embodiment of the present application;

FIG. 5b is a cross-sectional view of the body catheter of the alveolar lavage device of FIG. 5 a;

FIG. 6a is a schematic view of an alternate embodiment of a main catheter configuration including an irrigation channel and a suction channel;

FIG. 6b is a schematic view of the flow of fluid during flooding of the alveolar lavage device of the configuration shown in FIG. 6 a;

FIG. 6c is a schematic view of the flow of fluid during aspiration in the alveolar lavage device of the configuration shown in FIG. 6 a.

1, a body conduit; 11, a head portion; 111, an opening; 1111, side opening; 1112. 11121, 11122, open at the top; 112, injecting and sucking water flow channel group; 1121, water absorption flow passage; 1122, a water injection flow channel; 12, a connecting piece; 121, a water filling port; 122, a water suction port; 13, marking the structure; 14, separating ribs; 15, a soft buffer head structure; 2, a bronchoscope; 21, working cavity channel; 3, a liquid collecting bottle; 31, a first connecting pipe; 32, a second connecting pipe; 4, a low negative pressure device.

Detailed Description

The present application will be described in further detail with reference to the following drawings and examples. It is to be understood that the specific embodiments described herein are merely illustrative of the relevant invention and not restrictive of the invention. It should be noted that, for convenience of description, only the portions related to the present invention are shown in the drawings.

It should be noted that the embodiments and features of the embodiments in the present application may be combined with each other without conflict. The present application will be described in detail below with reference to the embodiments with reference to the attached drawings.

As mentioned in the background art, the present application provides an alveolar lavage device that can perform precise lavage on corresponding alveoli by aiming at the problem that in the prior art, the alveolar precise lavage technique has not been developed correspondingly due to the lack of devices such as the alveolar lavage device.

Please refer to fig. 1 to 4, in which fig. 1 is a schematic structural diagram of an alveolar lavage device according to an embodiment of the present application; FIG. 2a is a schematic view of a use scenario of an alveolar lavage device provided in the present application; FIG. 2b is a schematic view of the head of a main catheter extending into a bronchus of an alveolar lavage apparatus according to the present invention; FIG. 3a is a state diagram of a bronchoscope only used for lavage; FIG. 3b is a schematic view of the head of the main catheter being filled with water while performing irrigation using the alveolar irrigation apparatus provided in an embodiment of the present application; fig. 4 is a schematic view of the flow direction of the fluid during injection and suction when the set of irrigation channels of the main body tube of the alveolar lavage apparatus provided by the embodiment of the present application includes only one flow channel.

The alveolar lavage device that this application embodiment provided includes:

a main body duct 1, a head 11 for extending into a lung bronchus is formed at a first end of the main body duct 1, a water injection and suction flow passage set 112 for injecting water or sucking water is arranged in the main body duct 1, the water injection and suction flow passage set 112 extends into the head 11, and the head 11 is provided with an opening 111 communicated with a flow passage of the water injection and suction flow passage set 112; the main body catheter 1 is used for passing through a working channel 21 of a bronchoscope 2 so that the head 1 extends into a pulmonary bronchus, as shown in fig. 1, 2a and 4;

and the connecting assembly 12 is arranged at the second end of the main body conduit 1, and is used for enabling the second end of the main body conduit 1 to be communicated with the water injection and absorption device.

As shown in fig. 2, in the above-mentioned alveolar lavage device provided in the embodiment of the present invention, when the main body tube 1 is used, the main body tube 1 is extended into the lung of the patient through the working lumen 21 of the bronchoscope 2, and during the use, the working lumen 21 of the bronchoscope 2 is extended into the trachea of the lung, at this time, the head 11 provided at the first end of the main body tube 1 is extended out of the end of the working lumen 21 in the bronchoscope 2 and is further extended into the bronchus that needs to be lavaged, specifically, as shown in fig. 2a and 2b, the head 1 is extended into the corresponding bronchus, so that the openings 111 provided in the head 1 are all located in the bronchus to be lavaged, and are extended at least into H1, the physician injects a cleaning solution into the corresponding sub-bronchial alveolus through the injection and suction flow channel group 112 provided in the main body tube 1, and the cleaning solution is injected out through the openings 111 provided in the head 1 of the main body tube 1 to lavage the alveoli, as shown in fig. 3b, and the physician can further aspirate the bronchoalveolar lavage solution into the lung after the surgery.

As shown in fig. 3a and 3b, in the using process of the alveolar lavage device, since the head 11 of the main body catheter 1 can directly extend into the corresponding deep bronchus, compared with the way of performing lavage only by the working lumen 21 of the bronchoscope 2, when the alveolar lavage device provided by the embodiment of the present application is used for performing lavage operation, the device can perform accurate lavage on the corresponding alveolus, and can reduce the risk that cleaning solution enters other bronchus, thereby reducing the risk of contamination.

Of course, as shown in fig. 2a, the alveolar lavage device can be used with the liquid collection bottle 3 and the low negative pressure device 4 in the specific use process, specifically, the liquid collection bottle 3 can be connected to the connection assembly through the first connection tube 31 to communicate with the water injection and suction channel set 112 of the main catheter 1, and at the same time, is connected to the low negative pressure device 4 through the second connection tube 32.

More specifically, the low negative pressure device 4 may be a low negative pressure device satisfying a suction pressure range of 50 to 150 mmHg.

On the basis of the above technical solution, please refer to fig. 1, fig. 2b and fig. 4, in a preferred implementation, the opening 111 formed in the head 11 includes:

a top opening 1112 disposed at a top end of the head; and/or (c) and/or,

side opening 1111 is provided in the wall of the head tube.

In different usage environments, the top opening 1112 can be used for filling water and can also be used for sucking water; of course, the side opening can be used for filling water and sucking water.

Preferably, the wall of the head 11 is provided with 1-5 side openings 1111.

It is further preferred that the side opening 1111 of the tube wall of the head 11 is provided with 1-3.

In a preferred implementation, in the alveolar lavage device described above, the wall of the head 11 of the main catheter 1 can be provided with only one side opening 1111, and the area of the side opening 1111 can be 0.5 to 4 square millimeters. More preferably, the area of the side opening 1111 is 0.5 to 2 square millimeters. Specifically, reference may be made to fig. 5 to 6c, in which fig. 5 is a schematic structural diagram illustrating a water injection channel and a water absorption channel of a main catheter in the alveolar lavage device provided by the embodiment of the present application; FIG. 6a is a schematic view of an alternate embodiment of a water injection/suction channel set of a main catheter in an alveolar lavage device according to an embodiment of the present application, including a water injection channel and a water suction channel; FIG. 6b is a schematic view of the flow of fluid during flooding of the alveolar lavage device of the configuration shown in FIG. 6 a; FIG. 6c is a schematic view of the flow of fluid during aspiration by the alveolar lavage device of the configuration shown in FIG. 6 a.

In another preferred embodiment, the alveolar lavage apparatus described above is configured such that the head 11 of the main body duct 1 has a plurality of side openings 1111 formed in the wall thereof, and the plurality of side openings 1111 are distributed around the circumference of the head 11 and are spaced apart from each other in the axial direction of the head 11, as shown in fig. 1 and 4. When the side openings 1111 are used for water injection, the side openings 1111 are distributed as described above, so that the spray area of the head 11 when spraying the cleaning liquid can be increased, and the efficiency of the head 11 in irrigating the pulmonary alveoli of the corresponding bronchus can be increased.

Preferably, as shown in FIG. 2b, the distance H2 of each side opening 1111 from the tip of the head 11 in the axial direction of the head 11 is 4cm or less, more preferably 2cm or less, and most preferably 1cm or less.

Preferably, in the axial direction of the head 11, the area of the side opening 1111 nearest to the tip of the head 11 is not smaller than the area of the remaining side openings 1111. This arrangement of the side opening 1111 ensures the uniformity of the water flow in the direction close to the top end of the head 11 during the water injection and the water suction.

Based on the above technical solution, in a preferred implementation manner, the head 11 has an opening including a top opening 1112 disposed at the top end of the head, and the diameter of the top opening 1112 is 0.3-2mm, and more preferably 0.5-1.5mm.

In the alveolar lavage device provided in the embodiments, the water injection/suction flow passage set 112 in the main catheter 1 includes at least one flow passage, and the area of each flow passage in the main catheter is greater than or equal to 0.8 mm square, and the outer diameter of the main catheter is 1.0-3mm.

The water injection and absorption flow channel group can be arranged in various ways, as follows:

the first method is as follows:

with continued reference to fig. 4, the water injection and absorption flow channel set 112 includes only one flow channel.

In a specific use process, when water needs to be injected into the corresponding branch air pipe, the cleaning liquid is injected into the corresponding branch air pipe from the flow channel through the side opening 1111 and the top opening 1112 arranged on the head, and a specific liquid flow direction is shown by solid arrows in fig. 4; when water in the bronchus needs to be pumped out of the bronchus, the water in the bronchus flows into the flow channel from the bronchus through the side opening 1111 and the top opening 1112 arranged on the head 11, and the specific liquid flow direction is shown by the dotted arrow in fig. 4; thereby completing the lavage of the bronchus.

The second method comprises the following steps:

referring to fig. 5a to 6c, the water injection and suction channel set 112 in the main pipe 1 includes two channels.

In the technical scheme provided by the second mode:

in a first specific implementation:

the two flow channels of the water injection and absorption flow channel set 112 in the main body pipeline 1 may be a water injection flow channel 1121 and a water absorption flow channel 1122, the top opening 1112 is communicated with the water injection flow channel 1121 and the water absorption flow channel 1122, and the side opening 1111 is communicated with the water injection flow channel 1121 and/or the water absorption flow channel 1122.

In the alveolar lavage device provided by the second embodiment, the water injection flow channel 1121 and the water absorption flow channel 1122 are separately provided, and the water injection flow channel 1121 can supplement air during the suction process through the water absorption flow channel 1122, and can also perform continuous operation of water injection and suction under a set condition, so that the mutual influence between the water injection process and the suction process is small.

In addition to the alveolar lavage device according to the second embodiment, as shown in fig. 5a, in a preferred structure, the head 11 of the main catheter 1 has a water injection channel 1121 longer than the water suction channel 1122 in the axial direction of the head 11, the end of the water suction channel 1122 is formed in a diagonal shape, the end face of the opening smoothly transitions with the wall of the water injection channel 1121, and the side wall of the water suction channel 1122 is provided with a side opening 1111. In this structure, only a portion of the head 11 is provided with the water injection flow channel 1121, and the radial dimension of the head 11 at this portion can be made smaller, so that a tip structure is formed at the top of the head 11, which is beneficial to making the water injection flow channel 1121 penetrate into the corresponding bronchus more, and further improving the irrigation effect. In the specific use process, water can be injected into the bronchus through the top opening 11121 at the top of the water injection flow passage 1121, and then the liquid in the bronchus is sucked into the water absorption flow passage 1122 through the top opening 11122 at the top of the water absorption flow passage 1122 and the side opening 1111 on the side wall, thereby completing the lavage of the bronchus.

Specifically, as shown in fig. 5b, the water absorbing channel 1122 may have a crescent shape, and the water injecting channel 1121 has a circular shape, and the two channels are separated by the spacer rib 14.

In addition to the alveolar lavage device provided in the second embodiment, as shown in fig. 6a to 6c, in another preferred structure, the main body tube 1 has a water chamber (not shown) in the head, the top opening 1112 is communicated with the water chamber, and both the end of the water injection flow channel 1121 and the end of the water suction flow channel 1122 are communicated with the water chamber. In the above-mentioned embodiment, the water injection flow passage 1121 and the water suction flow passage 1122 share the single top opening 1112, which is advantageous for simplifying the top end structure of the head 11 and can reduce the size of the top end of the head 11.

In a specific use process, when water needs to be injected into the bronchus, a part of the cleaning liquid in the water injection flow channel 1121 may enter the bronchus through the top opening 1112, a part of the cleaning liquid may enter the water absorption flow channel 1122 through the water cavity, and enter the bronchus through the side opening 1111 of the water absorption flow channel 1122, and a specific liquid flow direction is as shown in fig. 6 b.

When it is desired to draw liquid from within the bronchial tube, as shown in FIG. 6c, the bronchial tube cleaning fluid can be drawn into the intake channel through the top opening 1112 and the side opening 1111 of the intake channel 1122.

In the specific use process of the alveolar lavage device shown in fig. 5a to 6c, when the cleaning fluid in the bronchus needs to be pumped, the water injection flow channel 1121 can be released, and the bronchus can be supplemented with air through the water injection flow channel 1121, as shown by the dotted arrow shown in fig. 6c, so that the need of moving the main catheter during pumping can be reduced, and the pumping can be performed more smoothly.

On the basis of the alveolar lavage device provided by the second embodiment, preferably, the second connection component of the main catheter 1 may include a first port, a second port, a third port, a fourth port and a valve core, wherein the first port is a water filling port 121, the second port is a water suction port 122, the third port is communicated with the water filling flow channel 1121 and the first port, the fourth port is communicated with the water suction flow channel 1122 and the second port, and the valve core is used for controlling the connection and disconnection between the first port and the third port, and between the second port and the fourth port when in operation.

In a second specific implementation:

the water injection and absorption flow passage set 112 in the main body pipeline 1 comprises a water injection and absorption flow passage for injecting and absorbing water and at least one air supplementing flow passage. When the suction device is used specifically, cleaning liquid can be injected into the bronchus through the water injection and suction flow channel, and the cleaning liquid in the bronchus is sucked away.

The third method comprises the following steps:

the water injection and suction flow channel set 112 in the main body pipeline 1 includes a water injection flow channel 1121, a water suction flow channel 1122 and at least one air supply flow channel.

On the basis of the solutions provided by the above-mentioned embodiments, preferably, as shown in fig. 1, the head 11 of the main body catheter 1 is provided with an identification means 13 for marking the position information of the opening 111. Through identification mechanism 13, the user can be accurate obtain the head 11 and stretch into the bronchial depth information, improves the controllability of lavage degree of depth.

Preferably, as shown in fig. 5a to 6c, the end of the head 11 is provided with a soft cushioning head structure 15. The soft buffer head structure 15 can reduce the damage to the bronchus when the head extends into the bronchus.

The specific embodiment is as follows:

the first embodiment is as follows: as shown in FIGS. 1 and 4, the main catheter 1 of the alveolar lavage device is a single lumen catheter, i.e., the water feeding and sucking flow channel set 112 includes only one flow channel. The main body conduit 1 is made of nylon material. The diameter of the main body conduit 1 is 1.8mm, and the diameter of the flow passage is 1.5mm. The head 11 is provided with two side openings 1111 distributed at both sides of the flow passage, the two side openings 1111 are 10mm apart from the top end of the head 11, the length of the side openings 1111 along the axis of the head 11 is 1.5mm, the width along the circumference of the head 11 is 1mm, and the diameter of the top opening 1112 is 0.98mm. The embodiment is characterized in that the diameter of the flow channel is larger, and the water injection efficiency and the suction efficiency are higher. The opening area of the top opening 1112 is smaller than that of the side opening 1111, so that the occurrence of tube blockage caused by sputum in the bronchus sucked into the flow channel from the top opening by negative pressure can be reduced.

Second embodiment, as shown in fig. 6a to 6c, the main body tube 1 of the alveolar lavage device is a double lumen tube, i.e., the water injection/suction flow channel set 112 of the main body tube 1 includes two flow channels. The main conduit 1 is made of polyether block polyamide. The diameter of the main body catheter 1 is 2.4mm, the length of the side opening 1111 along the axis of the head 11 is 2mm, the width along the circumferential direction of the head is 1mm, and the distance from the top opening 1112 of the head 11 is 10mm; the diameter of top opening 1112 is 1.5mm. The two flow paths of this embodiment provide more options for operating schemes: FIG. 6c shows that the water injection flow channel 1121 is opened for synchronous air supplement during suction, which can reduce the need for moving the main catheter 1 during suction, and thus make suction smoother; water injection and suction may also be performed simultaneously.

In the third embodiment, as a combination of the first and second embodiments, one flow channel of the double-lumen catheter can be made small and only used for air supply; the cross section space is reserved for the other flow passage to be filled with water and sucked to the maximum extent, so that the water filling efficiency and the sucking efficiency are improved.

Fourth embodiment, as shown in fig. 5a and 5b, the diameter of the main body catheter 1 is 2.4mm, and the injection and suction water channel set 112 of the main body catheter 1 comprises two channels, one channel has a crescent-shaped cross section, and the other channel has a circular cross section, wherein the circular channel has a diameter of 1mm, and the crescent-shaped channel is chamfered at a position 5mm away from the top end of the head 11. The crescent-shaped flow channel has a side opening 1111 having a length of 1.5mm along the axis of the head 11 and a width of 1mm along the circumferential direction of the head. The main conduit 1 is made of polyether block polyamide. The top opening 11121 of the circular flow passage is used for water injection, and the side opening 1111 and the top opening 11122 of the crescent flow passage are used for suction, so that water injection and suction can be carried out during use. Since the top opening 11121 of the circular flow channel is at the top of the head and the exiting water stream has some pressure, the water stream is not immediately sucked out. In the process of water injection and suction, the liquid level can be effectively controlled within a certain proper range by controlling the liquid injection speed and the suction pressure, so that the water injection and the suction are continuously carried out. This protocol may improve effectiveness for patients with localized infections with continuous lavage.

The foregoing description is only exemplary of the preferred embodiments of this application and is made for the purpose of illustrating the general principles of the technology. It will be appreciated by a person skilled in the art that the scope of the invention as referred to in the present application is not limited to the embodiments with a specific combination of the above-mentioned features, but also covers other embodiments with any combination of the above-mentioned features or their equivalents without departing from the inventive concept. For example, the above features may be replaced with (but not limited to) features having similar functions disclosed in the present application.

Claims

1. An alveolar lavage device, comprising:

the first end of the main body catheter forms a head part used for extending into a bronchus of a lung, a water injection and absorption flow channel group used for injecting water or absorbing water is arranged in the main body catheter, the water injection and absorption flow channel group extends into the head part, and the head part is provided with an opening communicated with flow channels of the water injection and absorption flow channel group; the main body catheter is used for penetrating through a working cavity channel of a bronchoscope so that the head part extends into a lung bronchus;

the connecting assembly is arranged at the second end of the main body conduit and is used for enabling the second end of the main body conduit to be communicated with a water injection and absorption device;

the head has an opening comprising: a top opening disposed at a top end of the head; and/or the side opening is arranged on the wall of the head pipe;

the pipe wall of the head is provided with a plurality of side openings which are distributed around the circumference of the head and are distributed at certain intervals in the axial direction of the head;

the side opening area closest to the head top end along the axial direction of the head is not less than the area of the rest side openings;

the water injection and absorption flow channel group comprises a water injection flow channel and a water absorption flow channel, the top opening is communicated with the water injection flow channel and the water absorption flow channel, and the side opening is communicated with the water injection flow channel and/or the water absorption flow channel; the area of each flow passage is more than or equal to 0.8 square millimeter, and the outer diameter of the main body conduit is 1.0-3mm;

the opening area of the top opening is smaller than that of the side opening;

in the head of the main body conduit, along the axial direction of the head, the length of the water injection flow channel is greater than that of the water absorption flow channel, the end part of the water absorption flow channel is in an oblique opening shape, the end surface of an opening is in smooth transition with the pipe wall of the water injection flow channel, and the side wall of the water absorption flow channel is provided with the side opening; or, a water cavity is arranged in the head of the main body conduit, the top opening is communicated with the water cavity, and the end part of the water injection flow channel and the end part of the water absorption flow channel are communicated with the water cavity.

2. The alveolar lavage device according to claim 1, wherein the head is provided with an identification mechanism for marking the opening position information.

3. The alveolar lavage device of claim 1, wherein the tip of the head is provided with a soft cushion head structure.

4. The alveolar lavage device of claim 1, comprising a liquid trap bottle and a low negative pressure device, wherein the liquid trap bottle has a first connecting tube and a second connecting tube, the liquid trap bottle communicating with the connection assembly through the first connecting tube, the liquid trap bottle communicating with the low negative pressure device through the second connecting tube.