CN114521927B

CN114521927B - Lavage catheter and lavage catheter system

Info

Publication number: CN114521927B
Application number: CN202011318217.9A
Authority: CN
Inventors: 陈泉; 李安宁
Original assignee: Shenzhen Lifetech Respiration Scientific Co Ltd
Current assignee: Shenzhen Lifetech Respiration Scientific Co Ltd
Priority date: 2020-11-23
Filing date: 2020-11-23
Publication date: 2024-05-07
Anticipated expiration: 2040-11-23
Also published as: CN114521927A

Abstract

The invention discloses an lavage catheter and a lavage catheter system, wherein the lavage catheter comprises a base and a switch piece, the base is provided with a containing cavity, and the containing cavity is provided with a perfusion opening, a pressure relief opening, a suction opening and a conversion opening in a communicating way; the switch piece has first state and second state relatively to the base, and when the switch piece is in first state, the switch piece is with filling port and conversion mouth intercommunication to be linked together with pressure release mouth and suction mouth, when the switch piece is in the second state, is linked together with suction mouth and conversion mouth. According to the lavage catheter and the lavage catheter system, the lavage operation and the suction operation can be repeatedly performed only by operating the switch piece to move relative to the base by utilizing the rapid switching of the switch piece in the adapter relative to the base in the first state and the second state, so that the operation complexity is reduced, and then the lavage efficiency of the bronchus alveolus can be effectively improved when the adapter is connected with the catheter to perform the lavage operation and the suction operation switching of the bronchus alveolus.

Description

Lavage catheter and lavage catheter system

Technical Field

The invention relates to the technical field of medical instruments, in particular to an lavage catheter and an lavage catheter system.

Background

The bronchoalveolar lavage technology is a technology for injecting physiological saline into bronchoalveoli by using a bronchoscope, sucking the bronchoalveoli immediately, collecting alveolar surface liquid and removing substances filled in alveoli, and checking inflammation, immune cells and soluble substances, thereby achieving the purposes of definite diagnosis and treatment.

Bronchoscopy is currently used for bronchoalveolar lavage, and is an important means for diagnosing certain lung diseases such as bronchopulmonary carcinoma, interstitial lung diseases and lung infectious diseases. At present, a hose is generally used for connecting one end of a collector with a bronchoscope negative pressure joint, and the other end of the collector is connected with negative pressure equipment. Saline is injected into the target bronchi through the other port of the bronchoscope fitting. When the bronchoalveoli are filled with water, a negative pressure switch on the bronchoscope is pressed, and liquid in the target bronchoscope can be sucked into the collector through a working channel hole at the distal end of the bronchoscope, so that one lavage and suction are completed. This bronchoalveolar lavage requires multiple small-dose lavages and aspiration of a single bronchi, which is particularly demanding for the physician. Moreover, because the bronchoscope is limited in size, the bronchoscope cannot extend into a secondary bronchus to perform lavage and suction, physiological saline can flow to other places after water filling, the recovered physiological saline is polluted by other places, accurate pathological finding cannot be performed, and the lavage liquid recovery rate is not high, so that complications such as hypoxia, fever and the like can be caused in the lavage liquid retention trachea.

Disclosure of Invention

The invention provides an lavage catheter which aims at solving the problem of low bronchoalveolar lavage efficiency.

The invention provides an lavage catheter, which comprises a conversion joint and a catheter, wherein the catheter is communicated with the conversion joint, the conversion joint comprises a base and a switch piece, the base is provided with a cavity, and the cavity is communicated with a perfusion opening, a pressure relief opening, a suction opening and a conversion opening; the switch piece is at least partially structurally and movably positioned in the containing cavity, and the switch piece has a first state and a second state relative to the base; when the switch piece is in a first state, the filling port is communicated with the switching port, and the pressure relief port is communicated with the suction port; when the switch piece is in the second state, the suction port is communicated with the conversion port; wherein the switching port is communicated with the catheter.

In one embodiment, the switch member is provided with a first channel and a second channel which are not communicated with each other, and the first channel and the second channel respectively form two openings on the outer surface of the switch member; when the switch piece is in a first state, the filling port is communicated with the switching port through the first channel, and the pressure relief port is communicated with the suction port through the second channel.

In an embodiment, the switch member is further provided with a suction channel, two openings are formed on the outer surface of the switch member, and the suction channel is not communicated with the first channel and the second channel.

In an embodiment, when the switch member is in the second state, the suction port communicates with the switching port through the second passage or the suction passage.

In an embodiment, when the switch member is in the second state, the suction port communicates with the switching port through the suction passage.

In an embodiment, the cavity penetrates through the adapter along the length extending direction of the adapter, and the switch piece is slidably or rotatably matched with the base along the axis direction of the cavity.

In an embodiment, the switch element is connected with an operating element, the operating element is exposed out of the base and is used for driving the switch element to switch from a first state to a second state relative to the base, and springs are arranged between the switch element and the base and/or between the operating element and the base and are used for driving the switch element to perform reset motion relative to the base.

In an embodiment, the switch piece is movably arranged in the cavity of the base in a penetrating manner along the axial direction, and is circumferentially limited to the base, one end of the switch piece is provided with a limiting boss, the other end of the switch piece is provided with a connecting shaft, the connecting shaft is connected with the operation piece, the spring is sleeved on the connecting shaft and is elastically arranged between the base and the operation piece, and when the switch piece is in a first state, the switch piece is driven by the spring to enable the limiting boss to elastically abut against the base.

In an embodiment, a guide pillar is disposed between the switch element and the base, a stepped groove is formed in the accommodating cavity of the base, a first bar-shaped groove is formed in the side wall of the stepped groove, a second bar-shaped groove is formed in the side wall of the limiting boss, the extending directions of the first bar-shaped groove and the second bar-shaped groove are parallel to the moving direction of the switch element relative to the base, a part of the guide pillar is accommodated in the first bar-shaped groove, and another part of the guide pillar protrudes out of the first bar-shaped groove to be in sliding fit with the second bar-shaped groove, and the switch element is circumferentially limited to the base.

In an embodiment, the switch member has an inner cavity penetrating through opposite ends of the switch member, and is provided with a filling channel and a pressure release channel, which penetrate through side walls of the inner cavity respectively to be communicated with the inner cavity; when the switch piece is in a first state, the filling opening is opposite to the filling channel, the pressure relief opening is opposite to the pressure relief channel, and when the switch piece is in a second state, the filling opening and the filling channel are staggered, and the pressure relief opening and the pressure relief channel are staggered.

In an embodiment, one end of the switch piece, which is close to the suction port, is provided with a step shaft, the step shaft comprises a guide part, the guide part is movably inserted into the suction port, a sealing ring is sleeved on the guide part, and when the switch piece is in the second state, the sealing ring is clamped between the outer wall of the step shaft and the inner wall of the suction port in a sealing manner.

The invention also provides an lavage catheter system comprising any of the lavage catheters described above and a bronchoscope, said catheters being extendable into a working channel of said bronchoscope from a working channel interface of said bronchoscope.

In an embodiment, the lavage catheter system further comprises a collector connected to the suction port by a first hose and a negative pressure device connected to the collector by a second hose and for sucking lavage fluid into the collector via the catheter and the second hose.

The lavage catheter comprises the adapter and the catheter, and the catheter can extend into a bronchoscope channel to reach a secondary bronchus during lavage, so that more accurate pathological searching is performed, and the adapter is rapidly switched between a first state and a second state relative to the base through the switch piece, so that the requirement of repeatedly and alternately lavaging and sucking the bronchoalveolus is met, the operation complexity is reduced, and the lavage efficiency of the bronchoalveolus is further effectively improved.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings that are required to be used in the description of the embodiments will be briefly described, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and other structures may be obtained according to the drawings without inventive effort for a person skilled in the art.

FIG. 1 is a schematic view showing an exploded structure of an lavage catheter according to an embodiment of the present invention;

FIG. 2 is a schematic view of the assembled structure of the lavage catheter shown in FIG. 1;

FIG. 3 is a schematic view of the structure of the base in the adapter of the lavage catheter shown in FIG. 1;

FIG. 4 is a schematic cross-sectional view of one of the directions of the base in the adapter of the lavage catheter shown in FIG. 1;

FIG. 5 is a schematic view of a cross-sectional structure of the base in another direction in the adapter of the lavage catheter shown in FIG. 1;

FIG. 6 is a schematic view of the switch member in the adapter of the lavage catheter shown in FIG. 1;

fig. 7 is a schematic cross-sectional view of the switching element of the adapter shown in fig. 6 along a cross-sectional plane S;

Fig. 8 is a schematic cross-sectional structure of the switching member of the adapter shown in fig. 6 along an axis perpendicular to the suction channel;

FIG. 9 is a schematic side view of a switch member of an adapter in an embodiment taken along a section plane S;

Fig. 10 is a schematic side view of a switch member of the adapter in another embodiment, taken along a section plane S;

Fig. 11 is a schematic cross-sectional view of a switching member of an adapter in another embodiment along a cross-sectional plane S;

fig. 12 is a schematic cross-sectional view of another embodiment of the switching element of the switching joint along the section plane S;

fig. 13 is a schematic cross-sectional view of a further embodiment of the switching element of the switching joint along the sectional plane S;

fig. 14 is a schematic cross-sectional view of a further embodiment of a switching element of the switching joint along a section plane S;

fig. 15 is a schematic cross-sectional view of a switching member of a switching joint according to another embodiment along a cross-sectional plane S;

fig. 16 is a schematic cross-sectional view of a switching element of a switching joint according to yet another embodiment along a cross-sectional plane S;

FIG. 17 is a schematic illustration of the application of bronchoalveolar lavage using an lavage catheter of an embodiment of the present invention;

FIG. 18 is an enlarged partial schematic view of the encircled portion of FIG. 17;

FIG. 19 is a schematic cross-sectional view of the lavage catheter according to an embodiment of the present invention, wherein the switch member is in a first state relative to the base;

FIG. 20 is a schematic cross-sectional view of the lavage catheter according to an embodiment, wherein the switch member is in a second state relative to the base;

FIG. 21 is a schematic view of an lavage catheter according to another embodiment;

FIG. 22 is an exploded view of the lavage catheter of FIG. 21;

FIG. 23 is a schematic cross-sectional view of the base in the adapter of the lavage catheter shown in FIG. 22;

FIG. 24 is a schematic cross-sectional view of the switch member of the adapter of the lavage catheter of FIG. 22;

FIG. 25 is a schematic view of the structure of the operating member in the adapter of the lavage catheter shown in FIG. 22;

FIG. 26 is a schematic view showing a cross-sectional structure of the switch member in one of the directions of the lavage catheter shown in FIG. 21 in a first state relative to the base;

FIG. 27 is a schematic view of another cross-sectional view of the switch member in the lavage catheter of FIG. 21 in a first state relative to the base;

FIG. 28 is a schematic view of a cross-sectional view of the lavage catheter of FIG. 21 in one of the directions with the switch member in a second state relative to the base;

FIG. 29 is a schematic view of the lavage catheter of FIG. 21 showing a cross-sectional structure of the switch member in another direction in a second state relative to the base;

Fig. 30 is a schematic illustration of the application of bronchoalveolar lavage using an lavage catheter of an embodiment of the present invention.

Detailed Description

In order that the above objects, features and advantages of the invention will be readily understood, a more particular description of the invention will be rendered by reference to the appended drawings. In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention. The present invention may be embodied in many other forms than described herein and similarly modified by those skilled in the art without departing from the spirit of the invention, whereby the invention is not limited to the specific embodiments disclosed below.

In the description of the present invention, it should be understood that the terms "center," "longitudinal," "transverse," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," "circumferential," etc. indicate or are based on the orientation or state relationships shown in the drawings, merely for convenience of description and to simplify the description, and do not indicate or imply that the devices or elements referred to must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the invention.

Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include at least one such feature. In the description of the present invention, the meaning of "plurality" means at least two, for example, two, three, etc., unless specifically defined otherwise.

In the present invention, unless explicitly specified and limited otherwise, the terms "mounted," "connected," "secured," and the like are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; either directly or indirectly, through intermediaries, or both, may be in communication with each other or in interaction with each other, unless expressly defined otherwise. The specific meaning of the above terms in the present invention can be understood by those of ordinary skill in the art according to the specific circumstances.

In the present invention, unless expressly stated or limited otherwise, a first feature "up" or "down" a second feature may be the first and second features in direct contact, or the first and second features in indirect contact via an intervening medium. Moreover, a first feature being "above," "over" and "on" a second feature may be a first feature being directly above or obliquely above the second feature, or simply indicating that the first feature is level higher than the second feature. The first feature being "under", "below" and "beneath" the second feature may be the first feature being directly under or obliquely below the second feature, or simply indicating that the first feature is less level than the second feature.

Example 1

As shown in fig. 1 and 2, the present embodiment provides an lavage catheter 60 that can be applied to bronchoalveolar lavage. In use, the lavage catheter 60 is switched to its on or off state to meet the need for a bronchoalveolar lavage or aspiration procedure.

Lavage catheter 60 comprises adapter 601, perfusion adapter 602, and catheter 603. The adapter 601 and the perfusion adapter 602 may be connected by means of an adhesive or screw-fit, or the adapter 601 and the catheter 603 may be connected by means of an adhesive or screw-fit.

As shown in connection with fig. 1 and 3, adapter 601 includes a base 6011 and a switch 6012. The base 6011 includes a main body columnar structure and a plurality of rod-like structures extending from an outer surface of the main body columnar structure, an axis of the plurality of rod-like structures being perpendicular to an axis of the main body columnar structure. The main body columnar structure is provided with a containing cavity 60115 penetrating along the axial direction of the main body columnar structure, through holes communicated with the containing cavity 60115 are respectively formed in the rod-shaped structures, and each through hole comprises a suction port 60111, a pouring port 60112 and a conversion port 60111, so that the rod-shaped structures are hollow. The main body columnar structure is also provided with a pressure relief opening 60114, and the pressure relief opening 60114 penetrates through the inner surface and the outer surface of the main body columnar structure in the direction perpendicular to the axis of the main body columnar structure to enable the cavity 60115 to be communicated with the outside. It will be appreciated that in other embodiments, the relief port 60114 may be a through hole formed in a rod-like structure perpendicular to the axis of the body columnar structure.

As shown in fig. 4 and 5, the suction port 60111, the pouring port 60112, the switching port 60111, and the pressure release port 60114 are respectively located on the peripheral side of the base 6011, and penetrate through the side wall of the chamber 60115 to communicate with the chamber 60115.

The structures of the suction port 60111, the pouring port 60112, the switching port 60113, and the pressure release port 60114 are not limited herein as long as they can meet the connection or conduction requirements of the corresponding lines.

For example, the suction port 6011 may be a tower fitting connected to the base 6011 to cooperate with the second hose 22 (see fig. 17) to form a suction passage 60126 connected to the negative pressure apparatus 40. Accordingly, the pouring port 60112 may be adapted to the communication requirement of the pouring device, for example, the pouring port 60112 is connected to the pouring connector 602, and when the pouring operation is performed, the liquid poured into the pouring port 6022 of the pouring connector 602 may enter the adapter 601 from the pouring port 60112 to adapt to the requirement of the subsequent pouring operation. An adjustment valve may be provided on the perfusion adapter 602 to adjust the flow rate of the perfusion adapter 602.

For another example, the pressure relief port 60114 may be communicated with the cavity 60115 in parallel, so long as the pressure relief port 60114 can adapt to pressure relief requirements, and a pipeline for pressure relief can be communicated to the outside of the base 6011 when pressure relief is performed.

Referring to fig. 1, the rod-shaped structure where the switching port 6013 is located is hollow, a hollow connecting pipe 6018 is further connected in the hollow rod-shaped structure, one end of the connecting pipe 6018 is inserted into the rod-shaped structure and communicated with the switching port 6013, the other end of the connecting pipe 6018 extends out of the rod-shaped structure and is in butt joint with the catheter 603 through the sleeve 6019, so that the butt joint position of the connecting pipe 6018 and the catheter 603 is covered by the sleeve 6019, and stable connection is formed between the connecting pipe 6018 and the catheter 603, so that when the catheter 603 is communicated with the perfusion port 60112, lavage liquid poured in from the perfusion port 60112 can enter the bronchus along the catheter 603 and leakage is not easy to occur. Further, since the rod-like structure in which the switching port 6013 is located is stably connected to the duct 603 through the connection pipe 6018 and the sleeve 6019, when the suction port 60111 is communicated with the duct 603, the negative pressure generated by the negative pressure apparatus 40 to which the suction port 60111 is connected can suck the lavage liquid in the bronchoalveolar via the duct 603.

As shown in fig. 19 and 20, at least part of the structure of the switching member 6012 is movably located in the accommodating cavity 60115, and the switching member 6012 has a first state and a second state relative to the base 6011, specifically, the switching member 6012 is moved in the accommodating cavity 6015 by the switching member 6012 to enable the switching member 6012 to be located at different positions relative to the base 6011, so that the open and closed states or the communication states of the suction port 6011, the filling port 60112, the switching port 6013 and the pressure release port 60114 on the base 6011 are changed, and the switching joint 601 is enabled to provide different conducting pipelines, so that state switching is achieved.

When the switch 6012 is in the first state, the pouring port 60112 communicates with the changeover port 60111, and the pressure release port 60114 communicates with the suction port 60111. When the switching member 6012 is in the second state, the switching member 6012 closes the pouring port 60112 and the pressure release port 60114, and communicates the suction port 60111 with the changeover port 60111.

As shown in connection with fig. 17 and 18, bronchoalveolar lavage using the lavage catheter of the present invention is also combined with bronchoscope 10, collector 30, negative pressure device 40 and a source of perfusion (not shown).

Bronchoscope 10 has a working channel 101, working channel 101 of bronchoscope 10 extending into the bronchi of lung 50 so that catheter 603 can extend from the working channel interface into the bronchoscope and then along working channel 101 into the more secondary bronchi 501.

Specifically, after catheter 603 is coupled to transition port 6013 of base 6011, catheter 603 can be moved along working channel 101 such that the end of catheter 603 distal from transition joint 601 extends from distal end 102 of working channel 101 (see fig. 18) to access the more secondary bronchi.

Since the catheter 603 is movable along the working channel 101, the diameter of the catheter 603 is small relative to the outer diameter of the working channel 101 of the bronchoscope 10 so that the catheter 603 can be advanced into the finer bronchi 501 for accurate irrigation when the bronchoalveolar is irrigated with the irrigation system. Meanwhile, the catheter 603 can enter the thinner bronchus 501 to perform suction lavage fluid, so that the problems that the bronchoscope 10 is limited by the outer diameter of the distal end 102 of the working channel 101, the more secondary bronchus 501 cannot be reached to perform suction lavage fluid, and complications such as hypoxia and fever are easily caused by lavage fluid retention in the trachea due to low lavage fluid recovery rate are solved.

As shown in fig. 17, the collector 30 is connected to the suction port 60111 through the first hose 21, and the negative pressure apparatus 40 is connected to the collector 30 through the second hose 22.

As shown in fig. 19, since the switching member 6012 communicates the pouring port 6012 with the switching port 6013 when the switching member 6012 is in the first state, the lavage liquid poured through the pouring port 60112 can flow into the catheter 603 through the switching port 6013.

As shown in fig. 20, when the switching member 6012 is in the second state, the switching member 6012 closes the pouring port 6012 and the pressure release port 60114, and communicates the suction port 60111 with the changeover port 60111, so that the negative pressure generated by the negative pressure apparatus 40 connected to the suction port 60111 can communicate with the duct 603 connected to the changeover port 60111 and suction, thereby sucking the lavage liquid through the duct 603 and finally sucking the sucked lavage liquid into the collector 30 along the second hose 22.

Because the switch 6012 is in the first state and the second state relative to the base 6011, the switch 6012 does not need to disassemble and assemble the structure such as the adapter 601 and the catheter 603, so that the operation is more convenient, and the requirement of the lavage system for repeatedly and alternately lavaging and sucking the bronchi alveoli can be met through the repeated switching of the switch 6012 in the first state and the second state, so that the lavage efficiency of the bronchi alveoli is effectively improved.

The opening and closing or communication of the suction port 6011, the pouring port 60112, the switching port 6013, and the pressure release port 60114 by the switching member 6012 can be realized by the following structure.

As shown in fig. 6 and 7, the switching member 6012 is provided with a first passage and a second passage that are not communicated with each other. The first channel and the second channel are not communicated with each other, and then when the liquid is injected from the first channel, the liquid does not flow into the second channel, and correspondingly, when the liquid is injected into the second channel, the liquid does not flow into the first channel.

For ease of understanding and description, the 2 ports of the first channel are referred to as "first opening 60123" and "second opening 60124", and the 2 ports of the second channel are referred to as "third opening 60122" and "fourth opening 60125", respectively.

As shown in connection with fig. 19, when the switching member 6012 is in the first state, the pouring port 6012 is opposite to the first opening 60123, the switching port 60113 is opposite to the second opening 60124, that is, the 2 ports of the first passage are opposite to the pouring port 60112 and the switching port 60113, respectively, at which time the pouring port 60112 communicates with the switching port 60113 through the first passage, and then the lavage fluid injected from the pouring port 60112 can flow from the first passage to the switching port 60113 to enter into the bronchoalveolar for the perfusion operation through the catheter 603 connected to the switching port 60113.

With continued reference to fig. 19, when the switch member 6012 is in the first state, the suction port 60111 is opposite to the third opening 60122, and the pressure relief port 60114 is opposite to the fourth opening 60125, at this time, the pressure relief port 60114 is communicated with the suction port 60111 through the second channel, so that the negative pressure generated by the negative pressure device 40 connected to the suction port 60111 is released from the pressure relief port 60114 through the second channel, and the effect that the lavage liquid just poured from the perfusion port 60112 is sucked from the gap between the switch member 6012 and the side wall of the accommodating chamber 60115 due to the fact that the suction effect of the negative pressure device 40 is not released is avoided, and the lavage liquid enters the bronchus from the catheter 603 is affected.

As shown in fig. 6 and 8, the switch member 6012 is also provided with a suction passage 60126. The suction passage 60126 and the first and second passages are not communicated with each other.

As shown in fig. 20, when the switching member 6012 is in the second state, the suction port 60111 communicates with the switching port 6013 through the suction passage 60126, that is, both ends of the suction passage 60126 communicate with the suction port 60111 and the switching port 6013, respectively, so that the negative pressure apparatus 40 connected to the suction port 60111 can suck at the switching port 6013 through the suction passage 60126, so that the catheter 603 connected to the switching port 60111 can suck the lavage fluid in the bronchoalveolar, and finally, the lavage fluid is recovered to the collector 30.

It should be noted that, the opening positions of the suction port 6011, the pouring port 60112, the switching port 60111 and the pressure relief port 60114 on the base 6011 are not limited, so long as the channel on the switching member 6012 can selectively conduct a specific port on the base 6011 when the switching member 6012 moves to the first state and the second state relative to the base 6011, so as to meet the corresponding pouring, sucking or pressure relief requirements. It will be appreciated that the arrangement of the suction port 60111, the pouring port 60112, the switching port 60111 and the pressure relief port 60114 on the base 6011 is not limited, and when the arrangement of the suction port, the pouring port, the switching port and the pressure relief port on the base is changed in different embodiments, the positions and the number of the channels on the switch member can be changed accordingly, so long as the respective pouring and suction operations are ensured to be achieved by switching the different positions of the switch member, for example, the suction port can be arranged between the switching port and the pressure relief port in the circumferential direction, the pouring port is arranged opposite to the suction port, at this time, the switch member can be provided with only the first channel and the second channel, and when the switch member is in the first state, the pouring port is communicated with the switching port through the second channel, and the lavage is achieved by rotating the state of the switch member.

As shown in fig. 5, the suction port 6011 and the switching port 6013 are coaxially disposed on two sides of the base 6011, so as to be convenient for an operator to hold.

In some embodiments, as shown in connection with fig. 3-5, the cavity 60115 of the base 6011 is tubular, and the suction port 60111 and the transition port 60111 extend through a sidewall of the cavity 60115 along the first axis C. The first axis C is perpendicular to the axis a of the cavity 60115. Through this structure setting, not only can be through once punching operation just can be processed out suction inlet 6011 and conversion mouth 6013 on base 6011, simultaneously, suction inlet 6011 and conversion mouth 6013 are located same axis, and the suction channel 60126 for communicating suction inlet 6011 and conversion mouth 6013 can set up into the linear type pipeline to reduce the complexity of the suction channel 60126 of switch 6012, make switch 6012 more easy production and processing.

Accordingly, the positions of the pouring port 60112 and the pressure relief port 60114 may be provided on opposite sides of the base 6011.

For example, as shown in fig. 5, the suction port 60111, the filling port 60112, the switching port 60111 and the pressure relief port 60114 are substantially equally spaced along the circumference of the base 6011 so as to have a sufficiently large space between adjacent ports, so that each passage corresponding to each port on the switching member 6012 can have a sufficiently large installation space so as to open the first passage and the second passage meeting the functional requirements on the switching member 6012, thereby reducing the difficulty in designing or processing the switching member 6012.

The pouring port 60112 and the pressure relief port 60114 may be provided offset from each other, so that the pouring port 60112 and the pressure relief port 60114 are provided offset with the suction port 60111 and the switching port 60111 being coaxially provided. As shown in fig. 7, the first channel and the second channel can be configured in an L shape without being communicated with each other, and the L-shaped first channel or second channel is convenient to process, and only needs to be drilled and intersected from two corresponding nearly vertical directions of the switch member 6012.

The shapes of the first passage, the second passage, and the suction passage 60126 have various possibilities. For example, in the switching member 6012 shown in connection with fig. 11 to 16, the extending path of the first passage may be a folded line shape, an arc shape, or a straight line shape. The extension path of the first channel may also be a dogleg, arc or straight line. The extension path of the suction passage 60126 is in a zigzag shape, an arc shape, or a straight line shape.

It should be noted that, the regulation of the respective pipelines by the switching member 6012 in the first state and the second state with respect to the base 6011 is only related to the conduction or closing state of the switching member 6012 to the suction port 6011, the perfusion port 60112, the switching port 60111, and the pressure release port 60114 on the base 6011 in the two states. Therefore, as long as the first passage, the second passage, and the suction passage 60126 are in the first state and the second state in the switching member 6012, the conductivity of the specific interface can be controlled to accommodate the functional requirements of the switching member 6012 in the first state and the second state with respect to the base 6011, without any particular requirement on the opening form or shape of each passage.

In some embodiments, switch 6012 slidably mates with base 6011 along axis a of cavity 60115. That is, the switching member 6012 is switched between the first state and the second state by moving in the axial direction relative to the base 6011, adjusting the position of the switching member 6012 in the axial direction of the base 6011.

As shown in connection with fig. 6 to 8, the axes of the first and second channels lie on the same sectional plane S of the switch 6012, and the axis of the suction channel 60126 is parallel to the sectional plane S.

The distance a from the axis of the suction channel 60126 to the cross-sectional plane S is 3 mm-5 mm, so that the switching element 6012 has enough movement travel when switching between the first state and the second state relative to the base 6011, thereby avoiding the state switching caused by false triggering, and simultaneously avoiding the situation that the switching element 6012 has overlarge travel when switching between the first state and the second state, and the switching element 6012 needs to be controlled to move a larger distance, so as to influence the control experience.

In some embodiments, the cross-sectional plane S may be a cross-section of the switch member 6012 through the axis of the first opening 60123, as shown in fig. 9, the cross-sectional plane S being perpendicular to the axis of the switch member 6012.

In other embodiments, the cross-sectional plane S may also be a diagonal plane inclined with respect to the axis of the switching member 6012, as shown in fig. 10, where the normal line of the cross-sectional plane S intersects the axis of the switching member 6012, i.e., the cross-sectional plane S is not perpendicular to the axis of the switching member 6012.

Note that, the switch member 6012 can slide to the first state or the second state with respect to the base 6011 in the direction of the axis a of the chamber 60115. In other embodiments, switch 6012 may be configured to switch between a first state and a second state in a manner that rotates about an axis a of volume 60115 relative to base 6011. Specifically, the switching member 6012 is rotatably fitted with the base 6011 about the axis a direction of the accommodating chamber 60115. At this time, the structure of the passage on the switching member 6012 may be as shown with reference to fig. 11 to 16, the axes of the first passage, the second passage, and the suction passage 60126 are all located on the same sectional plane S of the switching member 6012, the sectional plane S being perpendicular to the axial direction of the switching member 6012, so that the switching member 6012 selectively opens or closes the suction port 60111, the pouring port 60112, the switching port 60111, and the pressure relief port 60114 as the switching member 6012 rotates to the first state or the second state about the axis a of the chamber 60115 with respect to the base 6011.

The power source for the movement of the switch 6012 relative to the base 6011 may be electronically controlled or manually operated. In an electronically controlled manner, a micro-motor (not shown) may be provided to actuate the switch 6012 between a first state and a second state relative to the base 6011. The arrangement structure of the micro motor between the switch member 6012 and the base 6011 is not particularly limited as long as it can satisfy the need of the adapter 601 for switching the irrigation and suction related lines in the irrigation system.

The structure of the lavage catheter 60 will be further described below with reference to the lavage catheter 60 shown in fig. 1, in which the switching member 6012 and the base 6011 are manually switched between the first state and the second state.

As shown in fig. 1, the switch member 6012 is connected to an operating member 6015, and the operating member 6015 and the switch member 6012 may be connected by adhesion or screw. The operating member 6015 is exposed to the base 6011, so that the operating member 6015 drives the switching member 6012 to switch from the first state to the second state relative to the base 6011 by manipulating the operating member 6015.

It should be noted that, the movement form of the switch member 6012 relative to the base 6011 is different, and the operation manner of the operation member 6015 is also different, for example, when the switch member 6012 and the base 6011 are axially moved relative to each other to switch between the first state and the second state, the operation member 6015 is configured as a pressing structure for driving the switch member 6012 to axially move relative to the base 6011 by pressing. Accordingly, when the switching member 6012 is switched between the first state and the second state by being rotated about the axial direction with respect to the base 6011, the operating member 6015 may be configured as a knob so as to rotate the switching member 6012 with respect to the base 6011 by screwing.

The structure of the adapter 601 will be further described below taking the example in which the operation member 6015 drives the switch member 6012 to switch between the first state and the second state with respect to the base 6011 by pressing.

With continued reference to fig. 2, a spring 6014 is disposed between the switch member 6012 and the base 6011 and/or between the operating member 6015 and the base 6011, and the spring 6014 is configured to drive the switch member 6012 to perform a reset motion relative to the base 6011.

It should be noted that, the spring 6014 may reset the switch member 6012 from the first state to the second state, or may reset the switch member 6012 from the second state to the first state, depending on whether the adapter 601 is in the initial state or whether the spring 6014 maintains the switch member 6012 in the first state or the second state with respect to the base 6011.

For example, in some embodiments, in an initial state, the switching member 6012 is maintained in a first state relative to the base 6011 by the spring 6014, and when an operator drives the switching member 6012 against the force of the spring 6014, such that the switching member 6012 moves to a second state relative to the base 6011 and releases the manipulation of the switching member 6012, the switching member 6012 can be self-reset to the first state.

In another embodiment, the switch member 6012 is maintained in the second state relative to the base 6011 by the resiliency of the spring 6014, such that when the user manipulates the operation member 6015 to bring the switch member 6012 in the first state relative to the base 6011, a state switching of the lavage catheter 60 is achieved to accommodate the need of the lavage system for a bronchoalveolar lavage operation or a suction operation. In this embodiment, when the switch member 6012 is in the first state, the operation force of the user on the operation member 6015 is released, and the spring 6014 drives the switch member 6012 to return to the second state relative to the base 6011.

In the above embodiment, the spring 6014 is provided to realize the return movement of the switch member 6012 relative to the base 6011, so that when the state of the lavage catheter 60 is switched, only a user needs to apply a force in one direction to the operation member 6015 or release the operation member 6015, so that the adapter 601 can quickly conduct or block the corresponding pipeline, and the user can perform multiple pouring and sucking operations by repeatedly pressing the operation member 6015, thereby greatly improving the convenience of the switching operation of the switch member 6012 between the first state and the second state.

Specifically, as shown in fig. 20, when the switching member 6012 is switched from the first state to the second state with respect to the base 6011 by pressing the operation member 6015, the suction passage 60126 of the switching member 6012 communicates the suction port 60111 and the switching port 60111, and the pouring port 60112 and the pressure release port 60114 are closed by the switching member 6012. At this time, due to the negative pressure generated by the negative pressure device 40, the lavage liquid in the bronchus can be sucked into the collector 30 through the tube 603 via the second hose 22 to complete one suction operation. When the operation member 6015 is released, the spring 6014 drives the switch member 6012 to return to the first state of fig. 19 relative to the base 6011, so that the lavage operation can be performed again, and the lavage operation and the suction operation can be performed alternately by pressing the operation member 6015 multiple times, so that the lavage efficiency of the lavage system to the bronchoalveoli is effectively improved.

In some embodiments, as shown in fig. 1,4 and 6, the switching member 6012 may be configured as a stepped shaft, the switching member 6012 is movably disposed on the base 6011 along an axial direction, and is circumferentially limited on the base 6011, one end of the switching member 6012 has a limiting boss 6012a, the other end has a connecting shaft 60127, the connecting shaft 60127 is connected with the operating member 6015, and the spring 6014 is sleeved on the connecting shaft 60127 and is elastically disposed between the base 6011 and the operating member 6015. When the switch member 6012 is in the first state, the switch member 6012 is driven by the spring 6014 to make the limit boss 6012a elastically abut against the boss on the inner wall of the base 6011, so that the limit boss 6012a can have a positioning effect, so that the switch member 6012 is kept in the first state under the action of the spring 6014. In other embodiments, the position of the spring 6014 may be appropriately set such that the spring 6014 can maintain the switch member 6012 in the second state, which is not described herein.

As shown in conjunction with fig. 1 and 4, the base 6011 is formed with a groove 6017 at one end thereof near the operation member 6015, one end of the spring 6014 is limited to the groove 6017, and the other end abuts against one side of the operation member 6015 near the base 6011, so that the spring 6014 is elastically disposed between the operation member 6015 and the base 6011, so that the operation member 6015 can be pressed or released, so that the switching member 6012 connected to the operation member 6015 is switched between the first state and the second state with respect to the base 6011.

In some embodiments, as shown in fig. 4 and 6, a stepped groove 60115a is formed in the housing cavity 6015 of the base 6011, when the switch member 6012 moves relative to the base 6011, the limit boss 6012a moves in the stepped groove 60115a, and when the switch member 6012 is in the first state, the limit boss 6012a abuts against the bottom wall 60115b of the stepped groove 60115a, so that the switch member 6012 is kept in the first state under the action of the spring 6014, and when the operation member 6015 is pressed to compress the spring 6014 next time, the switch member 6012 is switched from the first state to the second state relative to the base 6011.

Referring to fig. 1, the adapter 601 further includes a guide post 6016, where the guide post 6016 is disposed between the switch member 6012 and the base 6011, and has a circumferential limiting effect on the switch member 6012, so as to prevent the switch member 6012 from rotating around the axial direction relative to the base 6011. It will be appreciated that in an embodiment in which the switching member 6012 is switched between the first state and the second state by rotating about the axial direction relative to the base 6011, the guide post 6016 may be omitted to ensure that the switching member 6012 can smoothly rotate relative to the base 6011.

The mounting form of the guide post 6011 between the switch member 6012 and the base 6011 is various, for example, one of the switch member 6012 and the base 6011 is connected to the guide post 6011, and the other is provided with a slide groove (not shown) that is slidably fitted with the guide post 6011 to guide the switch member 6012 to move axially relative to the base 6011 to the first state and the second state by the sliding fit of the guide post 6011 with the slide groove.

In other embodiments, as shown in conjunction with fig. 3 and 4, the side wall of the stepped groove 60115a is provided with a first bar-shaped groove 60116. As shown in fig. 6, a second bar-shaped groove 60111 is provided in the side wall of the limit boss 6012 a. The extending directions of the first bar-shaped groove 6016 and the second bar-shaped groove 60111 are parallel to the moving direction of the switch member 6012 relative to the base 6011, a part of the structure of the guide pillar 6016 is accommodated in the first bar-shaped groove 60116, and the other part of the structure of the guide pillar 6016 protrudes out of the first bar-shaped groove 60116 to be in sliding fit with the second bar-shaped groove 60111, and limit the switch member 6012 to the base 6011 in the circumferential direction.

It should be noted that the number of the first bar-shaped grooves 60116 and the second bar-shaped grooves 60111 may be 1 or more, so that more guide posts 6016 are provided to enhance the circumferential limiting effect of the switching member 6012 relative to the base 6011, so that the switching member 6012 can only move along the axial direction relative to the base 6011, and the channel on the switching member 6012 can be accurately aligned with the interface on the base 6011 when the switching member 6012 is switched between the first state and the second state relative to the base 6011.

It should be noted that, although the switch member 6012 is movably connected to the base 6011, a fit gap between the switch member 6012 and the base 6011 is relatively small to meet the air tightness requirement of the adapter 601, so that the perfusate is not easy to leak from the gap between the switch member 6012 and the base 6011 during the perfusion operation or the suction operation.

For example, in some embodiments, the switch 6012 has a clearance fit with the cavity 60115 of 0.02mm to 0.05mm, and a sealing structure is reasonably provided between the switch 6012 and the base 6011, thereby ensuring that the switch 6012 is capable of both moving relative to the base 6011 and ensuring the air tightness of the adapter 601 in the second state.

As shown in fig. 1, a base 6011 is connected with an end cover 6017, the end cover 6017 covers a step groove 60115a, and sealing rings 6013 are respectively arranged between the end cover 6017 and the base 6011 and between the outer wall of a connecting shaft 60127 and the side wall of the containing cavity 60115, so that the sealing effect between the switching member 6012 and the base 6011 is improved by using the sealing rings 6013, and when the switching member 6012 is in a second state and the priming system performs a pumping operation, the air tightness between the switching member 6012 and the base 6011 is better, so that the pumping effect is improved.

The seal ring 6013 may be made of silicone rubber, nitrile rubber, or the like, so as to obtain good sealing performance.

In an embodiment in which the switching member 6012 rotates relative to the base 6011 to achieve switching between the first state and the second state, a positioning structure may be disposed between the switching member 6012 and the base 6011 at a circumferential interval, so as to control the switching member 6012 to be rapidly positioned to the first state or the second state. For example, as shown in fig. 12, 2 limiting bosses 6012a are disposed at intervals on the peripheral side of the switch member 6012, an abutting member (not shown) is disposed on the inner wall of the cavity 6015 of the base 6011, and when the switch member 6012 rotates relative to the base 6011, the abutting member can move between the 2 limiting bosses 6012a, and when the abutting member abuts against one of the limiting bosses 6012a, the switch member 6012 is in a first state relative to the base 6011, and when the abutting member abuts against the other limiting boss 6012a, the switch member 6012 is in a second state relative to the base 6011. Therefore, the abutting piece and the limiting boss 6012a can be utilized to rapidly position the rotation position of the switching piece 6012 relative to the base 6011, so that an operator does not need to excessively pay attention to whether the switching piece 6012 moves to the position relative to the base 6011 when the working state of the lavage system is switched by using the lavage catheter 60 with the adapter 601.

Example 2

Another embodiment of the present invention, as shown in connection with fig. 21, provides an irrigation catheter 70 comprising an adapter 701, an irrigation adapter 702, and a catheter 703. Embodiment 2 differs from embodiment 1 in that the structure of the adapter 701 is different.

As shown in connection with fig. 22 to 24, the adapter 701 includes a base 7011 and a switch 7015. The base 7011 has a cavity 7011a, and the cavity 7011a is provided with a filling port 70111, a pressure release port 70112, a suction port 70113, and a switching port 70115 in communication.

In this embodiment, the positions of the suction port 70113 and the conversion port 70115 on the base 7011 are different from those in embodiment 1. Specifically, as shown in fig. 23, the cavity 7011a extends through the base 7011 along the second axis D to form the aforementioned suction port 70113 and the conversion port 70115 at opposite ends of the base 7011, respectively. The filling port 70111 and the pressure relief port 70112 penetrate through the side walls of the accommodating chamber 7011a to communicate with the accommodating chamber 7011a, respectively. The pouring port 70111 is a through hole penetrating a rod-like structure extending perpendicularly from the outer surface of the base 7011.

Similar to embodiment 1, as shown in connection with fig. 30, in this embodiment, the irrigation connection 702 and the catheter 703 are connected to the irrigation port 70111 and the transition port 70115, respectively, and the end of the catheter 703 remote from the base 7011 also extends from the distal end 102 of the working channel 101 to accommodate the need for irrigation or aspiration of bronchoalveolar. For a specific connection structure between the pouring connector 702 and the pouring port 70111, reference may be made to embodiment 1, and details are not described herein.

The shape and position of the transition port 70115 in embodiment 2 are different from those in embodiment 1, but the transition port 70115 may be capable of communicating with the catheter 703.

For example, as shown in fig. 23, the switching port 70115 is located at an end of the base 7011 away from the suction port 70113, and the switching port 70115 may be an opening surrounded by a side wall of the tubular housing 7011a, that is, the switching port 70115 and the housing 7011a may have the same inner diameter.

In other embodiments, the transition port 70115 may be formed at an end of the base 7011 remote from the suction port 70113 by compressing or expanding an inner wall of the cavity 7011a inwardly. The configuration of the transition port 70115 is not limited herein, as long as it can ultimately meet the installation requirements of the catheter 703.

As shown in fig. 22 and 26, a hollow connecting tube 7017 is installed at the switching port 70115 through a connecting member 7016, and the connecting tube 7017 is connected with the catheter 703 through a sleeve 7018, so that a stable connection is formed between the catheter 703 and the switching port 70115. The circumference of the connection member 7016 may be configured in a ring structure, so that when the connection member 7016 is mounted at the transition port 70115 of the base 7011, the connection member 7016 functions as a connection conduit 703 on one hand, and on the other hand, the connection member 7016 may also form a seal between the inner wall of the cavity 7011a of the base 7011 and the conduit 703, so that a good sealing property is provided between the conduit 703 and the cavity 7011a of the base 7011, and thus when the switch member 7015 is in the first state, the lavage liquid is infused through the infusion port 70111, the lavage liquid can be delivered to the bronchoalveolar via the conduit 703 without easily leaking from the transition port 70115, so as to obtain a good perfusion effect. When the switch 7015 is in the second state, the good air tightness between the conduit 703 and the base 7011 can also reduce the loss of negative pressure generated by the negative pressure device 40 due to the air leakage at the switching port 70115, so as to promote the effect of sucking the lavage liquid through the conduit 703.

In the lavage system of this embodiment 2, the connection between the collector 30 and the negative pressure device 40 and the adapter 701 is only required if the conduit 703 is connected to the adapter 70115, and when the perfusion opening 70111 and the pressure release opening 70112 are plugged by the switch 7015, the negative pressure device 40 connected to the suction opening 70113 can be sucked through the conduit 703, which is not described herein.

As shown in connection with fig. 24, the switch 7015 has a lumen 70153, the lumen 70153 extends through opposite ends of the switch 7015, the switch 7015 is provided with a filling passage 70151 and a pressure release passage 70152, and the filling passage 70151 and the pressure release passage 70152 extend through side walls of the lumen 70153 to communicate with the lumen 70153, respectively. This embodiment 2 is similar to embodiment 1 in that the switch 7015 is movable axially and/or about an axis to a first state and a second state relative to the base 7011.

The structure of the adapter 701 will be further described below taking the example of the switch 7015 being switched along its axis E between a first state and a second state relative to the base 7011.

As shown in connection with fig. 26, when the switch 7015 is disposed within the cavity 7011a, the second axis D is substantially coincident with the axis E of the switch 7015, in other words, the second axis D may be coincident with the axis E of the switch 7015 or may be nearly coincident.

As shown in fig. 26 and 27, when the switch 7015 is disposed in the housing 7011a, the suction port 70113 communicates with the switching port 70115 through the inner cavity 70153. When the switch 7015 is in the first state, the pouring opening 70111 is opposite to the pouring channel 70151 such that the pouring opening 70111 is in communication with the inner cavity 70153 through the pouring channel 70151, and the pressure release opening 70112 is opposite to the pressure release channel 70152 such that the pressure release opening 70112 is in communication with the inner cavity 70153 through the pressure release channel 70152.

As shown in fig. 28 and 29, when the switch 7015 is in the second state, the pouring port 70111 and the pouring channel 70151 are staggered from each other, the pressure release port 70112 and the pressure release channel 70152 are staggered from each other, and then the switch 7015 closes the pouring port 70111 and the pressure release port 70112, and at this time, the negative pressure generated by the negative pressure device 40 connected to the suction port 70113 can be sucked from the duct 703 connected to the switching port 70115 of the base 7011 through the inner cavity 70153.

As shown in fig. 24, the distance b between the axis of the pouring channel 70151 and the axis of the pressure releasing channel 70152 is 3 mm-5 mm along the axial direction of the inner cavity 70153, so that when the switch 7015 is in the first state, the operation of pouring the lavage liquid into the inner cavity 70153 through the pouring channel 70151 is satisfied, and the operation of releasing the negative pressure generated by the negative pressure device 40 connected with the suction port 70113 through the pressure releasing channel 70152 is not interfered with each other, specifically, the distance b between the axis of the pouring channel 70151 and the axis of the pressure releasing channel 70152 is controlled to be 3 mm-5 mm, the situation that the pouring channel 70151 and the pressure releasing channel 70152 are too close to each other is avoided, and the lavage liquid poured into the inner cavity 70153 by the negative pressure device 40 cannot be timely unloaded from the pressure releasing port 70112, so that the lavage liquid cannot enter the catheter 703 along the inner cavity 70153, and the perfusion operation is affected is avoided. In addition, the distance b is greater than the axial movement of the switch member, so that the perfusion channel 70151 is not communicated with the 70112 pressure relief port when the switch member is switched to the second state, so as not to affect aspiration.

As shown in connection with fig. 26 and 27, the lavage catheter 70 comprises a spring 7013, wherein the spring 7013 is disposed between the switch 7015 and the base 7011 and is configured to actuate the switch 7015 to perform a restoring motion relative to the base 7011. For example, in some embodiments, in a normal state, the switch 7015 is maintained in a first state relative to the base 7011 by the spring 7013, and the switch 7015 is capable of self-resetting to the first state when an operator actuates the switch 7015 against the force of the spring 7013 such that the switch 7015 moves to a second state relative to the base 7011 and releases manipulation of the switch 7015. Accordingly, in other embodiments, the spring 7013 may also be configured to maintain the switch 7015 in the second state such that the spring 7013 is configured to return the switch 7015 to the second state when the operator switches the switch 7015 to the first state and releases the switch.

In the above embodiment, the switch 7015 is made easier to repeatedly switch between the first state and the second state with respect to the base 7011 by the spring 7013.

As shown in fig. 26, a step shaft 7015a is formed at one end of the switch 7015 near the suction port 70113, and a spring 7013 is sleeved on the step shaft 7015a and elastically abuts against between the switch 7015 and the base 7011, so that the spring 7013 is constrained by the radial direction of the step shaft 7015a when elastically expanding and contracting, and the movement of the spring 7013 is relatively stable.

The step shaft 7015a includes a guiding portion 70154, the guiding portion 70154 is movably inserted into the suction port 70113, a sealing ring 7012 is sleeved on the guiding portion 70154, and the sealing ring 7012 can be a non-metal gasket, such as silicone rubber, nitrile rubber, and the like.

When the switch 7015 is in the second state, the sealing ring 7012 is sealingly clamped between the outer wall of the step shaft 7015a and the inner wall of the suction port 70113, so that a good seal is provided between the switch 7015 and the base 7011 by using the sealing ring 7012, so that when the switch 7015 is in the second state, the adapter 701 has good air tightness, so that when the negative pressure device 40 sucks the lavage liquid, the vacuum utilization rate is higher, and the suction effect is improved.

As shown in fig. 23 to 26, the switch 7015 is connected to an operating element 7014, the base 7011 is provided with a guide slot 70114, the guide slot 70114 penetrates through a side wall of the cavity 7011a, and the operating element 7014 can move along the guide slot 70114 and drive the switch 7015 to move to a first state and a second state relative to the base 7011.

The operation member 7014 includes a plug portion 70141, a slide portion 70142, and a push portion 70143, which are sequentially connected. The switch 7015 is provided with a matching groove 70155, the plug portion 70141 is matched with the matching groove 70155 to connect the operation member 7014 with the switch 7015, the sliding portion 70142 is located at the guide groove 70114, so that when the operation member 7014 is operated by the pushing portion 70143 to move, the sliding portion 70142 moves along the guide groove 70114, and the switch 7015 moves relative to the base 7011 under the driving of the operation member 7014.

The plug-in portion 70141 and the mating groove 70155 can be fixed and sealed by gluing.

When the switch 7015 is in the first state, one end surface 70142a of the sliding portion 70142 abuts against one end surface of the guide groove 70114, so that an in-place prompting effect can be achieved, and operation is simpler.

The technical features of the above-described embodiments may be arbitrarily combined, and all possible combinations of the technical features in the above-described embodiments are not described for brevity of description, however, as long as there is no contradiction between the combinations of the technical features, they should be considered as the scope of the description.

The above examples illustrate only a few embodiments of the invention, which are described in detail and are not to be construed as limiting the scope of the claims. It should be noted that it will be apparent to those skilled in the art that several variations and modifications can be made without departing from the spirit of the invention, which are all within the scope of the invention. Accordingly, the scope of protection of the present invention is to be determined by the appended claims.

Claims

1. The lavage catheter is characterized by comprising a conversion joint and a catheter, wherein the catheter is communicated with the conversion joint, the conversion joint comprises a base and a switch piece, the base is provided with a cavity, and the cavity is communicated with a perfusion port, a pressure relief port, a suction port and a conversion port; the switch piece is at least partially structurally and movably positioned in the containing cavity, and the switch piece has a first state and a second state relative to the base; when the switch piece is in a first state, the filling port is communicated with the switching port, and the pressure relief port is communicated with the suction port; when the switch piece is in the second state, the suction port is communicated with the conversion port; wherein the switching port is communicated with the conduit; wherein,

The switch piece is provided with a first channel and a second channel which are not communicated with each other, and the first channel and the second channel respectively form two openings on the outer surface of the switch piece; when the switch piece is in a first state, the filling port is communicated with the switching port through the first channel, and the pressure relief port is communicated with the suction port through the second channel.

2. An lavage catheter as in claim 1 wherein said switch member is further provided with a suction channel, said suction channel forming two openings in an outer surface of said switch member, and said suction channel is not in communication with both said first channel and said second channel.

3. An lavage catheter as in claim 1 wherein said aspiration port is in communication with said transition port through said second channel when said switch member is in a second state.

4. An lavage catheter as claimed in claim 2 wherein said aspiration port communicates with said transition port through said second channel or said aspiration channel when said switch member is in a second state.

5. An lavage catheter as in claim 1 wherein said lumen extends through said adapter along a length of said adapter, said switch member slidably or rotatably engaging said base along an axis of said lumen.

6. An lavage catheter of claim 5 wherein an operating member is connected to said switch member, said operating member being exposed to said base and adapted to drive said switch member from a first state to a second state relative to said base, a spring being provided between said switch member and said base and/or between said operating member and said base, said spring being adapted to urge said switch member to perform a reset motion relative to said base.

7. The lavage catheter of claim 6, wherein the switch member is movably disposed in the cavity of the base in an axial direction and circumferentially limited to the base, one end of the switch member has a limiting boss, the other end has a connecting shaft, the connecting shaft is connected with the operation member, the spring is sleeved on the connecting shaft and elastically disposed between the base and the operation member, and when the switch member is in the first state, the switch member is driven by the spring to elastically abut against the limiting boss on the base.

8. The lavage catheter of claim 7, wherein a guide post is disposed between the switch member and the base, the base forms a stepped groove in the cavity, a first bar-shaped groove is disposed on a side wall of the stepped groove, a second bar-shaped groove is disposed on a side wall of the limiting boss, extension directions of the first bar-shaped groove and the second bar-shaped groove are parallel to a moving direction of the switch member relative to the base, a part of the guide post is accommodated in the first bar-shaped groove, and another part of the guide post is protruded out of the first bar-shaped groove to be slidably matched with the second bar-shaped groove, and the switch member is circumferentially limited to the base.

9. An lavage catheter as defined in claim 6 wherein said switch member has an inner lumen extending through opposite ends of said switch member, said switch member being provided with a perfusion channel and a pressure relief channel extending through a side wall of said inner lumen for communication therewith, respectively; when the switch piece is in a first state, the filling opening is opposite to the filling channel, the pressure relief opening is opposite to the pressure relief channel, and when the switch piece is in a second state, the filling opening and the filling channel are staggered, and the pressure relief opening and the pressure relief channel are staggered.

10. An lavage catheter as in claim 9 wherein said switch member has a stepped shaft formed at an end thereof adjacent said suction port, said stepped shaft comprising a guide portion movably inserted into said suction port, said guide portion having a sealing ring disposed thereon, said sealing ring being sealingly sandwiched between an outer wall of said stepped shaft and an inner wall of said suction port when said switch member is in said second state.

11. An lavage catheter system comprising the lavage catheter of any one of claims 1-10 and a bronchoscope, said catheter extendable from a working channel interface of said bronchoscope into a working channel of said bronchoscope.

12. The lavage catheter system of claim 11 further comprising a collector connected to said suction port by a first hose and a negative pressure device connected to said collector by a second hose and adapted to draw lavage fluid into said collector through said catheter and said first hose.