Negative pressure suction system and assembling method thereof

Abstract

The invention discloses a negative pressure suction system and an assembling method thereof. The negative pressure suction system comprises a bronchofiberscope and a guide catheter penetrating into the bronchofiberscope, the suction mechanism comprises a switching mechanism and a first interface arranged on the switching mechanism, and the first interface is used for being connected with negative pressure equipment; the switching mechanism is connected to the switching mechanism, and the switching mechanism is used for being connected with the guiding catheter; the switch mechanism is used for controlling the attraction mechanism to be switched on and switched off. According to the application, through the arrangement of the switching mechanism, on the basis that the original function of the guiding catheter is not influenced, the guiding catheter can be connected with the guiding catheter of the bronchofiberscope, and the guiding catheter is used as a suction pipeline for suction, so that the operation of extracting the guiding catheter from the bronchofiberscope and then inserting the suction pipeline after suction is completed is omitted; and the phenomenon that the catheter is polluted due to the fact that the catheter is frequently drawn and inserted in the channel can be avoided. The operation is simple, and the operation efficiency can be obviously improved.

Description

Technical Field

[0001] The present application relates to the field of medical devices, and more particularly to a negative pressure suction system and an assembly method thereof, and more particularly to a negative pressure suction system and an assembly method thereof for use in negative pressure suction therapy. Background Art

[0002] During medical treatment, negative pressure is sometimes needed to aspirate blood, tissue fluid, sputum and other liquids in the patient's cavity. In the prior art, after the endoscope is fixed in position, a special sputum suction device can be used to extend a catheter for aspirating liquid into the patient's cavity for aspiration.

[0003] By sending the catheter of the suction mechanism from the endoscope channel into the patient's cavity, the endoscope can be used to observe the patient's cavity conditions, which is conducive to the suction operation. However, each time the suction operation is performed, it is necessary to take out the endoscope accessories originally used for the operation in the endoscope, and then insert the suction catheter for the operation. After the suction is completed, it is necessary to take out the suction catheter again and reconnect the operating accessories. In other words, each suction operation requires additional occupation of the endoscope's operating channel, so its operation efficiency is not high, which can easily lead to a longer operation time, and the frequent insertion and removal of the suction mechanism's catheter is also likely to cause safety hazards. Summary of the invention

[0004] In order to solve or at least partially solve the above technical problems, the first aspect of the present application provides an assembly method of a negative pressure suction system, characterized in that it comprises the following steps:

[0005] Connect the suction mechanism and the negative pressure device;

[0006] Insert the guiding catheter into the operating channel of the fiberoptic bronchoscope;

[0007] guiding the bronchoscope to a target position;

[0008] The proximal end of the guiding catheter is connected to a switching mechanism disposed on the suction mechanism.

[0009] Preferably, before the step of inserting the guiding catheter into the operating channel of the fiberoptic bronchoscope, the method further comprises:

[0010] Connecting the proximal end of the guiding catheter to a switching mechanism disposed on the suction mechanism;

[0011] Turning on the negative pressure device to check air tightness;

[0012] Turn off the switch mechanism on the suction mechanism;

[0013] Disconnect the guide catheter from the adapter.

[0014] The second aspect of the present application provides a negative pressure suction system, characterized in that it comprises: a bronchoscope, and a guiding catheter inserted into the bronchoscope;

[0015] Attract institutions, including:

[0016] A switch mechanism, and a first interface provided on the switch mechanism, wherein the first interface is used to connect a negative pressure device;

[0017] A switching mechanism, connected to the switch mechanism, and used to be connected to the guiding catheter;

[0018] The switch mechanism is used to control the on and off of the suction mechanism.

[0019] Preferably, the switching mechanism comprises:

[0020] An adapter, connected to the switch mechanism;

[0021] A switching catheter is connected to the adapter. A side of the switching catheter away from the adapter is provided with an annular mounting piece for the guide catheter to be connected.

[0022] The switch mechanism comprises:

[0023] A valve body, a valve core arranged in the valve body, and an elastic component connected to the valve core;

[0024] The valve body has an upper cavity and a lower cavity connected to each other. The valve core can be pushed by an external force to move toward the lower cavity to turn on the suction mechanism, and can move toward the upper cavity under the push of the elastic component to cut off the suction mechanism.

[0025] The adapter, the elastic component is a pressing plug, the pressing plug cooperates with the valve body to form the upper cavity, and the valve core can drive the pressing plug to deform when it moves relative to the valve body.

[0026] The adapter, the suction mechanism also includes a third cavity, and the third cavity is not connected to the lower cavity;

[0027] The upper cavity has an opening, and when the suction mechanism is cut off, the opening can be connected to the upper cavity, and when the suction mechanism is turned on, the opening can be blocked so that the third cavity and the upper cavity are not connected.

[0028] A further technical solution may be that the valve body has a first channel connecting the upper cavity and the lower cavity, and the valve core can move relative to the first channel;

[0029] The valve core has a second channel connected to the upper cavity; the port of the second channel can be blocked, and when the valve core moves toward the lower cavity, the port of the second channel can be connected to the lower cavity to conduct the suction mechanism.

[0030] Preferably, the valve core comprises:

[0031] A pressing portion, used for pressing to move the valve core;

[0032] A column connected to the pressing portion, with a size matching the first channel, the column being able to move on the first channel, and the second channel being formed on the column;

[0033] The second channel includes a first section, the extension direction of which is the same as the movement direction of the valve core, and has a first port and a second port, the first port is used to communicate with the upper cavity, and the second port is used to communicate with the lower cavity.

[0034] Preferably, the first interface is connected to the upper cavity through a third pipe, and the extension direction of the third pipe is substantially the same as the movement direction of the valve core.

[0035] Preferably, the first interface includes:

[0036] a straight line segment, one end of which is connected to the valve body;

[0037] The bending segment is connected to the other end of the straight segment, and its extension direction forms an angle with the extension direction of the straight segment.

[0038] This application, through the setting of the transfer mechanism, can be connected to the guiding catheter of the fiberoptic bronchoscope without affecting the original function of the guiding catheter, and the guiding catheter can be used as a suction channel for suction, eliminating the operation of pulling out the guiding catheter from the fiberoptic bronchoscope and inserting the suction channel after suction is completed, and can also avoid the phenomenon of catheter contamination caused by frequent pulling and inserting of the catheter in the channel. It is simple to operate and can significantly improve the efficiency of surgery. BRIEF DESCRIPTION OF THE DRAWINGS

[0039] In order to more clearly illustrate the implementation of the present application, the following is a brief introduction to the relevant drawings. It is understood that the drawings described below are only used to illustrate some implementations of the present application, and those skilled in the art can also obtain many other technical features and connection relationships not mentioned in this document based on these drawings.

[0040] Figure 1 This is a schematic diagram of the structure of the attraction mechanism in the embodiment of the present application;

[0041] Figure 2This is another structural schematic diagram of the attraction mechanism in the embodiment of the present application;

[0042] Figure 3 This is a schematic diagram of the structural cross-section of the attraction mechanism in the embodiment of the present application;

[0043] Figure 4 Another schematic cross-sectional view of the suction mechanism in the embodiment of the present application, wherein the valve core is omitted in the figure;

[0044] Figure 5 This is a schematic diagram of the structural cross-section of the valve core in the embodiment of the present application;

[0045] Figure 6 This is a schematic cross-sectional view of the structure of a valve core in another embodiment of the present application;

[0046] Figure 7 This is a schematic cross-sectional view of the structure of a valve core in another embodiment of the present application;

[0047] Figure 8 It is a schematic structural cross-sectional diagram of a valve core in another embodiment of the present application.

[0048] Description of reference numerals:

[0049] 1. Switch mechanism; 11. Negative pressure interface; 111. Straight section; 112. Bend section; 12. Adapter mechanism; 121. Adapter; 122. Adapter conduit; 123. Ring mounting piece;

[0050] 13. valve body; 131. upper cavity; 1311. opening; 132. lower cavity; 133. first channel;

[0051] 14. valve core; 141. pressing portion; 142. column;

[0052] 15. Elastic components;

[0053] 16. Transit pipeline;

[0054] 17. Sealing ring;

[0055] 2, second channel; 21, first section; 211, first port; 212, second port; 213, third port;

[0056] 22. Second paragraph; 23. Third paragraph. DETAILED DESCRIPTION

[0057] The technical solutions in the embodiments of the present application will be described in detail below in conjunction with the drawings in the embodiments of the present application.

[0058] Embodiment 1

[0059] The first aspect of this embodiment provides an attraction mechanism, such as Figure 1 and Figure 2 As shown, it includes a switch mechanism 1, and a negative pressure interface 11 arranged on the switch mechanism 1, and the negative pressure interface 11 is used to connect a negative pressure device;

[0060] A switching mechanism 12, connected to the switch mechanism 1, and used to connect to the guiding catheter of the fiberoptic bronchoscope;

[0061] The switch mechanism 1 is used to control the on and off of the suction mechanism.

[0062] Since the diameter of the bronchoscope is large, it cannot pass through a smaller channel. By using a smaller diameter guiding catheter to penetrate into the operating channel of the bronchoscope and adjusting the position of the end of the guiding catheter through the bronchoscope, it can be extended into areas that the bronchoscope cannot enter for operation. It should be noted that the guiding catheter is essentially a pipe with a smaller outer diameter, which can be used as a channel for other devices to extend into areas inside the patient's body, and its function is similar to the operating channel on the bronchoscope.

[0063] The suction mechanism can be connected to the guiding catheter of the fiberoptic bronchoscope through the setting of the switching mechanism 12 without affecting the original function of the guiding catheter, and the guiding catheter can be used as a suction channel for suction, eliminating the operation of pulling out the guiding catheter from the fiberoptic bronchoscope and inserting the suction channel after suction is completed, and can also avoid the phenomenon of the catheter being contaminated due to frequent pulling and inserting of the catheter in the channel. It is simple to operate and can significantly improve the efficiency of the operation.

[0064] The second aspect of the present embodiment further discloses a negative pressure suction system, comprising: a bronchoscope, and a guiding catheter inserted into the bronchoscope;

[0065] Attract institutions, including:

[0066] A switch mechanism 1, and a negative pressure interface 11 provided on the switch mechanism 1, wherein the negative pressure interface 11 is used to connect a negative pressure device;

[0067] A switching mechanism 12, connected to the switch mechanism 1, and the switching mechanism 12 is used to connect with the guiding catheter;

[0068] The switch mechanism 1 is used to control the on and off of the suction mechanism.

[0069] The suction system can connect the suction mechanism with the guiding catheter through the adapter mechanism 12 without affecting the original function of the guiding catheter, so that the guiding catheter can be used as a suction channel for suction. While simplifying the structure, it can save the operation of withdrawing the guiding catheter from the fiberoptic bronchoscope and inserting the suction channel after suction is completed, and can also avoid the phenomenon of the catheter being contaminated due to frequent withdrawal and insertion of the catheter in the channel. It is simple to operate and can significantly improve the efficiency of the operation.

[0070] Accordingly, the third aspect of this embodiment further discloses an assembly method of the negative pressure suction system, comprising the following steps:

[0071] Connect the suction mechanism and the negative pressure pump;

[0072] The fiberoptic bronchoscope that passes the guide tube into the bronchoscope;

[0073] guiding the bronchoscope to a target position;

[0074] The proximal end of the guide conduit is connected to the adapter mechanism 12 disposed on the suction adapter. First, the connecting device is connected to the negative pressure device, and the negative pressure device is used to provide negative pressure for the suction mechanism to prepare for the subsequent suction operation. The purpose of the negative pressure device is to provide negative pressure for the suction mechanism. In other embodiments, the suction mechanism can also be connected to a negative pressure pump or other negative pressure device. The negative pressure device can also be a negative pressure system in a hospital or other equipment that can provide negative pressure.

[0075] In some other embodiments, before the step of inserting the guide tube into the operating channel of the fiberoptic bronchoscope, the method further includes:

[0076] Connecting the proximal end of the guide tube to the switching mechanism 12 disposed on the suction switching device;

[0077] Turn on the negative pressure pump to check air tightness;

[0078] Turn off the switch mechanism on the attraction transfer device;

[0079] Disconnect the guide pipe and the adapter mechanism 12,

[0080] Through the above steps, the air tightness of the connection between the components can be checked before the suction operation is performed, so as to avoid the negative pressure being reduced due to the air tightness problem of the connection between the components, thereby affecting the suction effect.

[0081] In some preferred embodiments, Figure 1 and Figure 2 As shown, the switching mechanism 12 may include:

[0082] An adapter 121 connected to the switch mechanism 1;

[0083] The adapter catheter 122 is connected to the adapter 121 , and an annular mounting member 123 for the guide catheter to be connected is disposed at one end of the adapter catheter 122 away from the adapter 121 .

[0084] By setting the annular mounting member 123, the connection and disassembly between the switching catheter 122 and the guiding catheter can be quickly achieved. The annular mounting member 123 is essentially a connecting component that connects the switch mechanism 1 to the guiding catheter. Specifically, it can be a pagoda-head Luer outer cone joint. In addition, by setting the switching catheter 122, the switch mechanism 1 does not need to be directly connected to the guiding catheter, but is connected through the switching of the switching catheter 122. When moving the switch mechanism 1, the switching catheter 122 can provide a movement margin for the movement of the switch mechanism 1, so that the movement of the switch mechanism 1 will not drive the movement of the guiding catheter located in the bronchoscope, avoiding the movement of the switch mechanism 1 affecting the end position of the guiding catheter, which is conducive to maintaining the position of the guiding catheter for suction operation.

[0085] In some embodiments, Figure 3 , Figure 4 and Figure 5 As shown, the switch mechanism 1 may include a valve body 13, a valve core 14 disposed in the valve body 13, and an elastic component 15 connected to the valve core 14;

[0086] The valve body 13 has an upper cavity 131 and a lower cavity 132 which are connected to each other. The valve core 14 can be pushed by an external force to move toward the lower cavity 132 to turn on the suction mechanism, and can move toward the upper cavity 131 under the push of the elastic component 15 to cut off the suction mechanism.

[0087] Among them, the upper cavity 131 is connected to the negative pressure interface 11 for connecting to the negative pressure device; the lower cavity 132 is connected to the adapter 121. When the suction mechanism is in the on state, the upper cavity 131 can be connected to the lower cavity 132 so that the negative pressure of the negative pressure device can be transmitted to the lower cavity 132 and connected to the guide catheter through the adapter mechanism 12 to achieve suction. It should be noted that the above-mentioned upper cavity 131 and the lower cavity 132 do not limit the spatial position of the upper cavity 131 and the lower cavity 132, but are only used to distinguish the two cavities in terms of nouns. In this embodiment, the upper and lower cavities 131 and the lower cavity 132 can be understood as the spatial position of the two cavities on the switch mechanism 1.

[0088] The suction mechanism is turned on and off by pushing the valve core 14 to move. The suction mechanism can be controlled by simple actions such as pressing and releasing. The operation is simple and intuitive.

[0089] In addition, when the valve core 14 is pushed by an external force, the elastic component 15 can be deformed. When the external force disappears, the elastic component 15 can drive the valve core 14 to return to its original position under the action of its deformation recovery force.

[0090] In some embodiments, the elastic component 15 may be a spring. In other embodiments, the elastic component 15 may be a pressing plug, which cooperates with the valve body 13 to form the upper cavity 131, and the valve core 14 can drive the pressing plug to deform when it moves relative to the valve body 13.

[0091] Specifically, Figure 1 As shown, the upper end of the push plug is connected to the upper end of the valve core 14, and the lower end is connected to the valve body 13 to form an upper cavity 131. During the movement of the valve core 14, the push plug can always be connected to the valve core 14 so that there will be no gap in the valve core 14 during the movement, which can improve the air tightness of the valve core 14. When the valve core 14 moves toward the lower cavity 132, it can drive the push plug to deform, and after the external force disappears, the deformation recovery force of the push plug can drive the valve core 14 to reset, so that the suction mechanism is restored to the cut-off state.

[0092] In another embodiment, if Figure 2 As shown, the suction mechanism may further include a third cavity, and the third cavity is not connected to the lower cavity 132;

[0093] The upper cavity 131 has an opening 1311 . When the suction mechanism is cut off, the opening 1311 is connected to the upper cavity 131 . When the suction mechanism is turned on, the opening 1311 is blocked so that the third cavity is not connected to the upper cavity 131 .

[0094] When the suction mechanism is in the cut-off state, the upper cavity 131 can be connected to the third cavity through the opening 1311, so that the negative pressure of the negative pressure device connected to the upper cavity 131 can be transmitted to the third cavity, so that the valve core 14 will not be driven by the air pressure of the upper cavity 131 to move toward the lower cavity 132 and thus cause the suction mechanism to be turned on. When the valve core 14 moves toward the lower cavity 132 to turn on the suction mechanism, the opening 1311 can be blocked to cut off the connection between the third cavity and the upper cavity 131, so that the negative pressure of the negative pressure device can be transmitted to the lower cavity 132 for suction.

[0095] It should be noted that the third cavity can be an open space such as the outside world, or other space that can release the negative pressure of the upper cavity 131, and its purpose is to release the negative pressure of the upper cavity 131 to prevent the valve core 14 from passively moving toward the lower cavity 132 under the negative pressure in the upper cavity 131. Through the arrangement of the third cavity and the opening 1311, the air pressure in the upper cavity 131 can be controlled, thereby avoiding the suction mechanism from passively switching from the cut-off state to the on state without the action of external force, causing errors.

[0096] Specifically, in this embodiment, the elastic device is a pressing plug, which is provided with an opening 1311. When the suction mechanism is in the cut-off state, the upper cavity 131 can be connected to the external space through the opening 1311; and when the valve core 14 moves toward the lower cavity 132, it can drive the pressing plug to deform to close the opening 1311, thereby cutting off the connection between the upper cavity 131 and the external space.

[0097] In some other embodiments, a blocking block corresponding to the opening 1311 may be provided on the valve core 14 , and the blocking block may move with the valve core 14 to block or open the opening 1311 .

[0098] Embodiment 2

[0099] This embodiment is a further improvement based on the first embodiment, and the improvement is: Figure 3 and Figure 4 As shown, the valve body 13 has a first passage 133 communicating with the upper cavity 131 and the lower cavity 132, and the valve core 14 can move relative to the first passage 133;

[0100] The valve core 14 has a second channel 2 , a port of which can be blocked, and when the valve core 14 moves toward the lower cavity 132 , the port of the second channel 2 can be opened to connect the upper cavity 131 and the lower cavity 132 .

[0101] The first channel 133 can provide a track for the movement of the valve core 14, guide the movement of the valve core 14 and limit the position of the valve core 14. Accordingly, a corresponding limiting structure can be provided on the first channel 133 to limit the movement path of the valve core 14, which can prevent the valve core 14 from escaping from the first channel 133 on the one hand, and limit the movement distance of the valve core 14 on the other hand, so as to avoid accelerating the material fatigue of the elastic component 15 due to the excessive movement distance of the valve core 14, thereby improving the durability of the suction mechanism.

[0102] By setting the second channel 2, the upper cavity 131 and the lower cavity 132 can be connected, and the negative pressure of the upper cavity 131 can be transmitted to the lower cavity 132 to perform the suction operation. Specifically, when the suction mechanism is in the cut-off state, the port at one or both ends of the second channel 2 is blocked, so that the upper cavity 131 and the lower cavity 132 are not connected; when the valve core 14 moves toward the lower cavity 132, the port of the second channel 2 is opened, and the second channel 2 is unblocked so that the upper cavity 131 and the lower cavity 132 are connected.

[0103] In some preferred embodiments, Figure 3 and Figure 4As shown, a sealing ring 17 may be further provided in the first channel 133. The sealing ring 17 can seal the gap between the valve core 14 and the first channel 133 to improve air tightness, thereby improving the cutting effect of the suction mechanism.

[0104] In some embodiments, Figure 5 As shown, the valve core 14 may include:

[0105] A pressing portion 141, used for pressing to move the valve core 14;

[0106] A column 142 connected to the pressing portion 141 , wherein the size of the column 142 matches the first channel 133 and moves on the first channel 133 , and the second channel 2 is formed on the column 142 ;

[0107] The second channel 2 includes a first section 21 , the extension direction of the first section 21 is the same as the movement direction of the valve core 14 , and the first section 21 has a first port 211 and a second port 212 , the first port 211 is used to communicate with the upper cavity 131 , and the second port 212 is used to communicate with the lower cavity 132 .

[0108] The pressing portion 141 can be a force point of the valve core 14. By pressing the pressing portion 141, an external force can be applied to the valve core 14 to push the valve core 14 to move. In addition, the pressing portion 141 can also serve as an action position of the elastic component 15, used to abut against one end of the elastic component 15, so that when the valve core 14 moves, the elastic component 15 can be deformed by the pressing portion 141. In this embodiment, Figure 1 As shown, the pressing plug is sleeved on the valve core 14, and its upper end is connected to the pressing part 141, and the lower end is connected to the valve body 13 to form an upper cavity 131; when the valve core 14 moves toward the lower cavity 132, the pressing part 141 can drive the elastic component 15 to deform, and when the valve core 14 is reset, the deformation recovery force of the pressing part 141 can act on the pressing part 141 to drive the valve core 14 to reset. In addition, the size of the column 142 matches the size of the first channel 133, so that the first channel 133 can limit the column 142 and serve as a track to guide the movement of the column 142, i.e., the valve core 14.

[0109] The first section 21 of the second channel 2 includes a first port 211 for communicating with the upper cavity 131 and a second port 212 for communicating with the lower cavity 132. When the suction mechanism is in the cut-off state, the first port 211 and / or the second port 212 are blocked, so that the upper cavity 131 and the lower cavity 132 are not connected; when the valve core 14 moves toward the lower cavity 132, the first port 211 and the second port 212 are opened, and the second channel 2 is unblocked so that the upper cavity 131 and the lower cavity 132 are connected. In some embodiments, the first port 211 can always be connected with the upper cavity 131; when the suction mechanism is in the cut-off state, the second port 212 is blocked, and when the valve core 14 moves toward the lower cavity 132, the second port 212 is opened.

[0110] In some embodiments, Figure 6 As shown, the first port 211 can be oriented in the radial direction of the first section 21, and the length of the first port 211 in the movement direction of the valve core 14 is greater than the length of the movement path of the valve core 14, so that during the movement of the valve core 14, the first port 211 always at least partially protrudes outside the first channel 133 and communicates with the upper cavity 131. This can facilitate the flow of gas between the upper cavity 131 and the lower cavity 132, and is conducive to the transmission of the negative pressure in the upper cavity 131 to the lower cavity 132, thereby improving the suction effect of the suction mechanism.

[0111] In addition, in some other embodiments, Figure 5 and Figure 7 As shown, the second channel 2 may further include a second section 22, which is in communication with the first port 211 of the first section 21, the extension direction of the second section 22 is at an angle with the extension direction of the first section 21, and the second section 22 has at least one port in communication with the upper cavity 131. During the movement of the valve core 14, the second section 22 is always located in the upper cavity 131 and is in communication with the upper cavity 131 through its port. This can increase the channel area of ​​the second channel 2 in communication with the upper cavity 131, facilitate the gas flow between the upper cavity 131 and the lower cavity 132, and facilitate the negative pressure in the upper cavity 131 to be transmitted to the lower cavity 132, thereby improving the suction effect of the suction mechanism.

[0112] In other embodiments, Figure 5 and Figure 6 As shown, the second channel 2 also includes a third section 23, which is connected to the second port 212 of the first section 21, and its extension direction has an angle with the extension direction of the first section 21, so that the port of the second section 22 can be closed by the inner wall of the first channel 133, and when the valve core 14 moves toward the direction of the lower cavity 132, the port of the third section 23 is connected to the lower cavity 132.

[0113] The shape formed by the combination of the first section 21 and the third section 23 can be roughly regarded as an L-shape. Among them, the first port 211 of the first section 21 is always connected to the upper cavity 131, and the second port 212 is connected to the third section 23; when the suction mechanism is in the cut-off state, the port of the third section 23 is located in the first channel 133 and is blocked by the inner wall of the first channel 133 to be blocked, and the port of the third section 23 is not connected to the lower cavity 132, and when the valve core 14 moves toward the lower cavity 132, the port of the third section 23 extends from the first channel 133 to the lower cavity 132, and is connected to the lower cavity 132, so that the suction mechanism is turned on. That is, through the setting of the third section 23, the valve core 14 can block or open the port of the third section 23 during the movement of the second channel 2 to control the conduction and cutoff of the suction mechanism.

[0114] Preferably, if Figure 7 and Figure 8 As shown, the first port 211 and the second port 212 of the first section 21 are both oriented in the same radial direction, and the first port 211 and the second port 212 can be combined to form a third port 213. The length of the third port 213 in the movement direction of the valve core 14 is greater than the sum of the movement path of the valve core 14 and the length of the first channel 133, so that during the movement of the valve core 14, the third port 213 always has at least a portion protruding out of the first channel 133 and communicating with the upper cavity 131; when the suction mechanism is in the cut-off state, the lower part of the third port 213 is located in the first channel 133 and is blocked by the inner wall of the first channel 133 to be blocked, so that the third port 213 is not connected to the lower cavity 132; and when the valve core 14 moves toward the lower cavity 132, the lower part of the third port 213 can extend from the first channel 133 to the lower cavity 132, and communicate with the lower cavity 132, so that the suction mechanism is turned on. This arrangement combines the first port 211 and the second port 212 to form the third port 213 , which simplifies the structure of the valve core 14 and facilitates processing while meeting functional requirements, thereby effectively saving processing time and processing costs.

[0115] Embodiment 3

[0116] This embodiment is a further improvement based on the first and second embodiments, and the improvement is that: Figure 3 As shown, the negative pressure interface 11 is connected to the upper cavity 131 through a transfer pipe 16 , and the extension direction of the transfer pipe 16 is substantially the same as the movement direction of the valve core 14 .

[0117] Through the setting of the third channel 16, on the one hand, the negative pressure interface 11 can be connected to the upper cavity 131, so that the negative pressure of the negative pressure device can be transmitted to the upper cavity 131; on the other hand, the negative pressure interface 11 can be set on the same plane as the adapter 121, which is beneficial to control the center of gravity of the suction mechanism, so that the center of gravity of the suction mechanism is concentrated, and the suction mechanism is convenient to be placed stably.

[0118] In some more preferred embodiments, Figure 2 As shown, the negative pressure interface 11 may include:

[0119] A straight line segment 111, one end of which is connected to the valve body 13;

[0120] The bending segment 112 is connected to the other end of the straight segment 111 , and an extending direction of the bending segment and an extending direction of the straight segment 111 form an angle.

[0121] The bending section 112 is used to be connected to the negative pressure device through a catheter. Specifically, one end of the catheter is connected to the bending section 112, and the other end is connected to the negative pressure device.

[0122] By setting the bending section 112, a part of the negative pressure interface 11 can be offset to one side. On the one hand, the catheter connected to the negative pressure interface 11 can be offset to one side, which is conducive to holding and controlling the suction mechanism and facilitating the suction operation. On the other hand, some space can be avoided to facilitate other operations.

[0123] In addition, in some embodiments, a positioning mechanism, such as a snap-on structure, may be provided on the valve body 13; accordingly, the fiberoptic bronchoscope should also be provided with a connecting mechanism that cooperates with the positioning mechanism. The switch mechanism 1 can be fixedly installed on the fiberoptic bronchoscope through the cooperation of the positioning mechanism and the connecting mechanism.

[0124] It is obvious to those skilled in the art that the present application is not limited to the details of the exemplary embodiments described above, and that the present application can be implemented in other specific forms without departing from the spirit or essential features of the present application. Therefore, the embodiments should be regarded as exemplary and non-limiting in all respects, and the scope of the present application is defined by the appended claims rather than the above description, and it is intended that all changes falling within the meaning and scope of the equivalent elements of the claims be included in the present application. Any reference numeral in a claim should not be regarded as limiting the claim to which it relates.

Claims

1. A method for assembling a negative pressure suction system, characterized in that: The steps include: Connect the suction mechanism and the negative pressure device; Insert the guiding catheter into the operating channel of the fiberoptic bronchoscope; guiding the bronchoscope to a target position; The proximal end of the guiding catheter is connected to a switching mechanism disposed on the suction mechanism.

2. The method for assembling a negative pressure suction system according to claim 1, characterized in that: Before the step of inserting the guiding catheter into the operating channel of the fiberoptic bronchoscope, the method further includes: Connecting the proximal end of the guiding catheter to a switching mechanism disposed on the suction mechanism; Turning on the negative pressure device to check air tightness; Turn off the switch mechanism on the suction mechanism; Disconnect the guide catheter from the adapter.

3. A negative pressure suction system, characterized in that: include: A fiberoptic bronchoscope, and a guiding catheter inserted into the fiberoptic bronchoscope; Attract institutions, including: A switch mechanism, and a first interface provided on the switch mechanism, wherein the first interface is used to connect a negative pressure device; A switching mechanism, connected to the switch mechanism, and used to be connected to the guiding catheter; The switch mechanism is used to control the on and off of the suction mechanism.

4. The negative pressure suction system according to claim 3, characterized in that: The switching mechanism comprises: An adapter connected to the switch mechanism; A switching catheter is connected to the adapter. A side of the switching catheter away from the adapter is provided with an annular mounting piece for the guide catheter to be connected.

5. The negative pressure suction system according to claim 4, characterized in that: The switch mechanism comprises: A valve body, a valve core arranged in the valve body, and an elastic component connected to the valve core; The valve body has an upper cavity and a lower cavity connected to each other. The valve core can be pushed by an external force to move toward the lower cavity to turn on the suction mechanism, and can move toward the upper cavity under the push of the elastic component to cut off the suction mechanism.

6. The negative pressure suction system according to claim 5, characterized in that: The elastic component is a pressing plug, and the pressing plug cooperates with the valve body to form the upper cavity. When the valve core moves relative to the valve body, it can drive the pressing plug to deform.

7. The negative pressure suction system according to claim 5, characterized in that: The suction mechanism further includes a third cavity, and the third cavity is not connected to the lower cavity; The upper cavity has an opening, and when the suction mechanism is cut off, the opening can be connected to the upper cavity, and when the suction mechanism is turned on, the opening can be blocked so that the third cavity and the upper cavity are not connected.

8. The negative pressure suction system according to any one of claims 5 to 7, characterized in that: The valve body is provided with a first passage connecting the upper cavity and the lower cavity, and the valve core can move relative to the first passage; The valve core has a second channel connected to the upper cavity; the port of the second channel can be blocked, and when the valve core moves toward the lower cavity, the port of the second channel can be connected to the lower cavity to conduct the suction mechanism.

9. The negative pressure suction system according to claim 8, characterized in that: The valve core comprises: A pressing portion, used for pressing to move the valve core; A column connected to the pressing portion, with a size matching the first channel, the column being able to move on the first channel, and the second channel being formed on the column; The second channel includes a first section, the extension direction of which is the same as the movement direction of the valve core, and has a first port and a second port, the first port is used to communicate with the upper cavity, and the second port is used to communicate with the lower cavity.

10. The negative pressure suction system according to claim 9, characterized in that: The first interface is in communication with the upper cavity through a third pipeline, and an extension direction of the third pipeline is substantially the same as a movement direction of the valve core.

11. The negative pressure suction system according to claim 9, characterized in that: The first interface comprises: a straight line segment, one end of which is connected to the valve body; The bending segment is connected to the other end of the straight segment, and its extension direction forms an angle with the extension direction of the straight segment.

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