Staged intervention tube body assembly and bronchus endoscope

Abstract

The invention discloses a staged interventional catheter body assembly and a bronchus endoscope, the staged interventional catheter body assembly comprises a plurality of sheathing canals which are sequentially sleeved from inside to outside, and each sheathing canal is provided with an operation channel along the front-back direction in a penetrating manner; in every two adjacent sheathing canals, the sheathing canal located on the inner side has a first state that the sheathing canal located on the inner side is contained in the operation channel of the sheathing canal located on the outer side, a second state that the sheathing canal located on the outer side movably stretches out forwards in the operation channel of the sheathing canal located on the outer side, and a third state that the sheathing canal located on the outer side movably breaks away backwards in the operation channel of the sheathing canal located on the outer side. On the basis of the same bronchial endoscope, insertion pipe fittings of various specifications can be formed through flexible combination, and then different requirements of actual intervention environments can be more conveniently and flexibly met, so that the overall bronchial endoscope has higher universality and reliability.

Description

Technical Field

[0001] The present invention relates to the technical field of bronchoscopes, and particularly to a hierarchical intervention tube body assembly and a bronchoscope. Background Art

[0002] A bronchoscope is a medical device used to observe the internal structure of the airway, diagnose and treat respiratory diseases. It enters the airway through the natural cavity, can directly examine the lesions of the trachea, bronchi and lungs, and support operations such as biopsy and interventional treatment.

[0003] Since there are airways of various sizes in the bronchi, in order to better target the treatment of airways of various sizes, existing bronchoscopes generally have specially designed insertion tubes of different specifications for airways of different sizes. However, this obviously increases the inconvenience of operation during the diagnosis and treatment process. Summary of the Invention

[0004] The main object of the present invention is to provide a hierarchical intervention tube body assembly and a bronchoscope, aiming to solve the problem that traditional bronchoscopes cannot be used universally for airways of different sizes, resulting in inconvenient operation.

[0005] To achieve the above object, a hierarchical intervention tube body assembly proposed by the present invention includes a plurality of sheaths sleeved with each other in sequence from inside to outside, and each of the sheaths is provided with an operation channel penetrating in the front-rear direction;

[0006] Wherein, among every two adjacent sheaths, the sheath located inside has a first state of being received in the operation channel of the sheath located outside, a second state of moving forward and protruding from the operation channel of the sheath located outside, and a third state of moving backward and disengaging from the operation channel of the sheath located outside.

[0007] Optionally, at least one of the sheaths includes:

[0008] An insertion tube, extending in the front-rear direction, and at least a partial tube section of the insertion tube is made of a flexible and bendable material so that the insertion tube can be bent and deformed; and,

[0009] An imaging device, including a fixed seat and an imaging module received in the fixed seat, the fixed seat is fixedly provided at the front end of the insertion tube, and the imaging surface of the imaging module faces forward and is exposed.

[0010] Optionally, the inner insertion tube includes a first tube body and a second tube body arranged side by side, the first tube body is provided with the operation channel penetrating in the front-rear direction, the second tube body is provided with a wiring channel penetrating in the front-rear direction, the wiring channel is for installing the insertion tube and the imaging device, and for the cable of the imaging module to pass through;

[0011] The first tube body and the second tube body are fixedly connected, or the first tube body and the second tube body are detachably connected.

[0012] Optionally, the first tube body and the second tube body are detachably connected, and in the third state, the first tube body moves backward to disengage;

[0013] The second tube body, the insertion tube and the imaging device are interlocked to be synchronously received in the sheath tube located outside thereof or can move backward to disengage; or,

[0014] The insertion tube and the imaging device are interlocked to be synchronously received in the second tube body or can move backward to disengage.

[0015] Optionally, each of the sheath tubes includes the inner insertion tube and at least two outer insertion tubes located outside the inner insertion tube.

[0016] Optionally, the inner insertion tube further includes an adjustment tube, the adjustment tube is sleeved on the insertion tube in a movably adjustable manner along the front-rear direction, and the hardness of the adjustment tube is greater than the hardness of the insertion tube.

[0017] Optionally, one of every two adjacent sheath tubes is provided with a connection part, and the other is provided with a docking part. In the first state, the connection part and the docking part are detachably connected;

[0018] The connection part and the docking part are mechanically connected and can be separated when the external force is not less than a preset threshold; and / or,

[0019] The connection part and the docking part are electrically controlled and connected and can be separated when a preset electrical signal is received.

[0020] Optionally, one of every two adjacent sheath tubes is provided with a connection part, and the other is provided with a docking part. In the first state, any connection part and any docking part are detachably connected;

[0021] Among them, in the sheath tube provided with the imaging device, the connection part or the docking part is linked and connected with the imaging device.

[0022] In addition, to achieve the above object, the present invention also provides a bronchoscope, including an operating component and the hierarchical interventional tube body assembly as described above.

[0023] Optionally, the bronchoscope further includes a driving mechanism, the driving mechanism is arranged on the operating component and is connected to each of the sheath tubes to drive each of the sheath tubes to mutually switch between the first state, the second state and the third state.

[0024] In the technical solution provided by the present invention, when the size of the currently intervened airway is large and the requirement for the softness of the sheath tube is small, each sheath tube can be operated in the first state. When the size of the currently intervened airway decreases and / or the requirement for softness increases, the sheath tube located inside can be gradually operated to the second state according to actual needs, so that the inner sheath tube with a relatively reduced outer diameter and relatively increased softness of the overall insertion pipe member extends out from the outer sheath tube, facilitating the execution of further interventional diagnosis and treatment operations. When the size of the currently intervened airway is large but the requirement for the softness of the sheath tube is large, the sheath tube located inside can be gradually operated to the third state according to actual needs, so that the outer diameter of the overall insertion pipe member remains unchanged but the softness increases, facilitating the execution of further interventional diagnosis and treatment operations. Based on the same bronchoscope, the present invention can flexibly combine to form insertion pipe members of various specifications, and then it is more convenient to flexibly adapt to different requirements of the actual intervention environment, making the overall bronchoscope more versatile and reliable. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art. Obviously, the drawings in the following description are only some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can be obtained based on the structures shown in these drawings.

[0026] Figure 1 Schematic perspective view of an embodiment of the hierarchical interventional tube assembly provided by the present invention;

[0027] Figure 2 For Figure 1 Enlarged structural view of part A in

[0028] Figure 3 For Figure 1 Axial schematic view of the hierarchical interventional tube assembly in

[0029] Figure 4 For Figure 1 Schematic perspective view of the outer cannula

[0030] Figure 5 For Figure 4 Front-end structural view of the outer cannula, where the perspective member is assembled to the main tube body;

[0031] Figure 6 For Figure 4 Front-end structural view of the outer cannula, where the perspective member is not assembled to the main tube body;

[0032] Figure 7 For Figure 1Schematic three-dimensional diagram of the insertion tube and the imaging device inserted into the inner insertion tube;

[0033] Figure 8 For Figure 7 Enlarged structural schematic diagram at position B in;

[0034] Figure 9 For Figure 1 Axial schematic diagram of the inner insertion tube in the third state in;

[0035] Figure 10 For Figure 1 Axial schematic diagram of the second embodiment of the inner insertion tube and the first outer insertion tube in the third state in;

[0036] Figure 11 For Figure 1 Axial schematic diagram of the third embodiment of the inner insertion tube and the first outer insertion tube in the third state in.

[0037] Explanation of the reference numerals in the drawings:

[0038] 100 Inner insertion tube; 110 Insertion tube; 120 Imaging device; 121 Fixed seat; 122 Imaging module; 130 Adjusting tube; 141 Fixed part; 142 Fixed mating part; 150 First tube body; 160 Second tube body; 200a First outer insertion tube; 200b Second outer insertion tube; 201 Front tube section; 201a Imaging tube wall section; 201b Liquid passing tube wall section; 202 Rear tube section; 203 Wiring channel; 204 Liquid passing channel; 205 Operation channel; 206 Traction channel; 210 Main tube body; 211 Installation notch; 220 Fluoroscopic part; 221 Main body; 222 Extension arm; 223 Insertion protrusion; 224 Insertion port; 231 Connection part; 232 Docking part; 310 First seat body; 320 Second seat body; 400 Traction wire.

[0039] The realization, functional features and advantages of the object of the present invention will be further described in conjunction with the embodiments with reference to the accompanying drawings. Detailed implementation manners

[0040] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts belong to the scope of protection of the present invention.

[0041] It should be noted that if there are directional indications (such as up, down, left, right, front, back...) involved in the embodiments of the present invention, the directional indications are only used to explain the relative positional relationship, movement conditions, etc. between components in a certain specific posture (as shown in the attached drawings). If the specific posture changes, the directional indications will also change accordingly.

[0042] In addition, if there are descriptions such as "first", "second", etc. involved in the embodiments of the present invention, the descriptions of "first", "second", etc. are only for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly specifying the quantity of the indicated technical features. Thus, the features defined with "first", "second" may explicitly or implicitly include at least one such feature. In addition, the meaning of "and / or" appearing throughout the text includes three parallel scenarios. Taking "A and / or B" as an example, it includes scenario A, or scenario B, or the scenario where both A and B are satisfied simultaneously. In addition, the technical solutions between various embodiments can be combined with each other, but it must be based on the ability of those of ordinary skill in the art to implement. When the combination of technical solutions results in contradictions or cannot be implemented, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection required by the present invention.

[0043] Please refer to Figures 1 to 11 , the present invention provides a hierarchical interventional tube body assembly (hereinafter simply referred to as the insertion tube) and a bronchoscope to which it is applied.

[0044] A bronchoscope generally includes an operating component and an insertion tube. For ease of understanding, in the following embodiments, it is described by taking the bronchoscope having a forward and a backward direction as an example. The insertion tube extends along the front-back direction and is installed at the front end of the operating component. When actually performing an interventional diagnosis and treatment operation, at least the front section of the insertion tube intervenes into the patient's body. The operating component is externally placed and can be held and operated by an operator.

[0045] Among them, the insertion tube is generally at least partially arranged to be bendable and adjustable, forming a bending section. It can be understood that the bending characteristics of the bending section can be directly defined by the material. That is, for example, at least the bending section of the insertion tube can be made of a flexible and bendable material. Or further, at least the bending section of the insertion tube can be made of an elastic and bendable material. Of course, the bending characteristics of the bending section can also be defined by a special structure. That is, for example, at least the bending section of the insertion tube can be composed of two single-body components that are movably hinged.

[0046] The bending movement of the inserted pipe fitting can be obtained by driving of a traction mechanism. Specifically, the traction mechanism may include a traction wire 400 and a wire reel. Correspondingly, the inserted pipe fitting is provided with a traction channel 206 extending backward at least starting from the bending section. The front section of the traction wire 400 is movably arranged at the traction channel 206. The front end of the traction wire 400 is fixedly connected to the side wall of the bending section. The rear section of the traction wire 400 is fixedly connected to the wire reel. In this way, when an operator manually operates or automatically drives the wire reel to rotate around its own axis based on a specific electronic control component, the traction wire 400 can be driven to perform a winding stroke or a release stroke. In the winding stroke, the traction wire 400 has a backward acting force, which can drive the corresponding side of the bending section to be stressed, so as to achieve the purpose of bending deformation of the bending section. On the contrary, in the release stroke, the backward acting force of the traction wire 400 is cancelled, and the bending section can be reset under the action of, for example, an elastic restoring force. Or the traction wire 400 has a forward acting force, which drives the bending section to reset.

[0047] It should be noted that the above inserted pipe fitting can perform one-way bending or at least two-way bending. When the inserted pipe fitting can specifically perform two-way bending, it can be two-way bending arranged oppositely on the same radial direction of the inserted pipe fitting.

[0048] When the inserted pipe fitting can specifically perform four-way bending, specifically in an embodiment, at least one sheath is made of a flexible and bendable material. The sheath is provided with four traction channels 206 extending in the front-rear direction. Among the four traction channels 206, two traction channels 206 are respectively arranged on both sides of the sheath in the first radial direction, and the remaining two traction channels 206 are respectively arranged on both sides of the sheath in the second radial direction. The hierarchical interventional tube body assembly further includes four traction wires 400, and the four traction wires 400 are respectively arranged at the four traction channels 206 in a one-to-one correspondence. The front end of each traction wire 400 is fixedly connected to the sheath, and the rear end is used for connecting an external driving component to move back and forth under the driving of the external driving component, so as to drive the sheath to bend and deform towards the side where it is located. The first radial direction and the second radial direction are at least cross-set. Further, the first radial direction and the second radial direction can be arranged substantially perpendicular to each other.

[0049] Specifically, please refer to Figures 1 to 11 The hierarchical interventional tube body assembly includes a plurality of sheaths sleeved on each other from inside to outside in sequence, and each sheath is provided with an operation channel 205 penetrating in the front-rear direction; wherein, among every two adjacent sheaths, the inner sheath has a first state of being received in the operation channel 205 of the outer sheath, a second state of protruding forward from the operation channel 205 of the outer sheath, and a third state of moving backward and disengaging from the operation channel 205 of the outer sheath.

[0050] In the technical solution provided by the present invention, when the size of the currently intervened airway is large and the requirement for the softness of the sheath tube is small, each sheath tube can be operated in the first state. When the size of the currently intervened airway decreases and / or the requirement for softness increases, according to actual needs, the sheath tube located inside can be gradually operated to the second state, so that the inner sheath tube with a relatively reduced outer diameter and relatively increased softness of the overall insertion tube extends out from the outer sheath tube, facilitating the execution of further interventional diagnosis and treatment operations. When the size of the currently intervened airway is large but the requirement for the softness of the sheath tube is large, according to actual needs, the sheath tube located inside can be gradually operated to the third state, so that the outer diameter of the overall insertion tube remains unchanged but the softness increases, facilitating the execution of further interventional diagnosis and treatment operations. Based on the same bronchoscope, the present invention can flexibly combine to form insertion tubes of various specifications, and then it is more convenient to flexibly adapt to the different needs of the actual intervention environment, making the overall bronchoscope more versatile and reliable.

[0051] It can be understood that each sheath tube is generally provided with an operation channel 205 running through in the front-back direction. The operation channel 205 can be penetrated by, for example, diagnostic and treatment instruments. Among every two adjacent sheath tubes, the inner sheath tube is movably penetrated at the operation channel 205 of the outer sheath tube.

[0052] The front-back movement of the inner sheath tube relative to the outer sheath tube can be directly realized by manual operation of the operator. Or in an embodiment, the bronchoscope further includes a driving mechanism, which is arranged on the operation component and connected to each sheath tube to drive each sheath tube to switch between the first state, the second state, and the third state. In this way, with the help of the driving mechanism, the front-back movement of each sheath tube can be controlled and adjusted more precisely.

[0053] Please combine Figures 1 to 3 、and Figures 7 to 11 , and the following will specifically describe the inner cannula 100.

[0054] The inner cannula 100 may include an insertion tube 110 and an imaging device 120. Among them, the insertion tube 110 extends in the front-back direction. And at least a partial tube section of the insertion tube 110 is made of a flexible and bendable material so that the insertion tube 110 can be bent laterally. The imaging device 120 includes a fixing seat 121 and an imaging module 122 housed in the fixing seat 121. The fixing seat 121 is fixedly arranged at the front end of the insertion tube 110. And the imaging surface of the imaging module 122 faces forward and is exposed.

[0055] It can be understood that the insertion tube 110 and the imaging device 120 can directly form the overall structure of the inner cannula 100 and are movably penetrated inside the outer cannula.

[0056] Or in a further solution, the inner tube 100 also includes a first tube body 150 and a second tube body 160 arranged side by side, the first tube body 150 is penetrated by an operation channel 205 along the front-to-back direction, and the second tube body 160 is penetrated by a wiring channel 203 along the front-to-back direction, and the wiring channel 203 is used for the installation of the insertion tube 110 and the imaging device 120, and for the cables of the imaging module 122 to pass through.

[0057] The first tube body 150 and the second tube body 160 can be integrally formed. In this case, the first tube body 150 and the second tube body 160 are inseparably fixedly connected. According to actual needs:

[0058] When the inner tube 100 is in the second state, the first tube 150, the second tube 160, the imaging device 120 and the insertion tube 110 may be moved forward from the outer tube together. Alternatively, only the imaging device 120 and the insertion tube 110 may be moved forward from the outer tube together, and the first tube 150 and the second tube 160 may be kept in the outer tube.

[0059] When the inner tube 100 is in the third state, the first tube 150, the second tube 160, the imaging device 120 and the insertion tube 110 may be moved backward and separated from the outer tube. Alternatively, only the imaging device 120 and the insertion tube 110 may be moved backward and separated from the outer tube, and the first tube 150 and the second tube 160 may remain in the outer tube.

[0060] Of course, the first tube body 150 and the second tube body 160 can be formed separately and obtained by detachably or non-detachably connecting them. When the first tube body 150 and the second tube body 160 are non-detachably connected, please refer to the above for details. When the first tube body 150 and the second tube body 160 are detachably connected, that is, the first tube body 150 and the second tube body 160 have a separation state and a connection state.

[0061] When in the connection state, similarly to the above:

[0062] If the inner tube 100 is in the second state, the first tube 150, the second tube 160, the imaging device 120 and the insertion tube 110 may be moved forward from the outer tube together. Alternatively, only the imaging device 120 and the insertion tube 110 may be moved forward from the outer tube together, and the first tube 150 and the second tube 160 may remain contained in the outer tube.

[0063] When the inner tube 100 is in the third state, the first tube 150, the second tube 160, the imaging device 120 and the insertion tube 110 may be moved backward and separated from the outer tube. Alternatively, only the imaging device 120 and the insertion tube 110 may be moved backward and separated from the outer tube, and the first tube 150 and the second tube 160 may remain in the outer tube.

[0064] When in separation:

[0065] When the inner tube 100 is in the second state, specifically, the first tube body 150, the second tube body 160, the imaging device 120 and the insertion tube 110 may be extended forward from the outer tube together. Alternatively, only the imaging device 120 and the insertion tube 110 may be extended forward from the outer tube together, and the first tube body 150 and the second tube body 160 may be kept in the outer tube. Alternatively, the first tube body 150 may be extended forward from the outer tube; the second tube body 160, the insertion tube 110 and the imaging device 120 may be kept in the outer tube. Alternatively, the second tube body 160, the insertion tube 110 and the imaging device 120 may be extended forward from the outer tube together; the first tube body 150 may be kept in the outer tube.

[0066] When the inner tube 100 is in the third state, specifically, the first tube body 150, the second tube body 160, the imaging device 120 and the insertion tube 110 may be detached from the outer tube backwards. Alternatively, only the imaging device 120 and the insertion tube 110 may be detached from the outer tube backwards, and the first tube body 150 and the second tube body 160 may be kept in the outer tube. Alternatively, the first tube body 150 may be detached from the outer tube backwards; the second tube body 160, the insertion tube 110 and the imaging device 120 may be kept in the outer tube. Alternatively, the second tube body 160, the insertion tube 110 and the imaging device 120 may be detached from the outer tube backwards; the first tube body 150 may be kept in the outer tube.

[0067] Further, the inner cannula 100 may further include an adjustment tube 130. The adjustment tube 130 is sleeved on the insertion tube 110 in a movable and adjustable manner along the front-back direction. Among them, the hardness of the adjustment tube 130 is greater than that of the insertion tube 110. By adjusting the adjustment tube 130 to move forward relative to the insertion tube 110 to approach the fixed seat 121, the adjustment tube 130 completely sleeves the insertion tube 110. With the help of the greater hardness of the adjustment tube 130, it helps to appropriately enhance the overall hardness of the sheath tube in the current state, facilitating further exploration after the sheath tube reaches the limit position. On the contrary, by adjusting the adjustment tube 130 to move backward relative to the insertion tube 110 to move away from the fixed seat 121, the insertion tube 110 is directly exposed. With the help of the softness of the insertion tube 110 itself, it helps to appropriately enhance the overall softness of the sheath tube in the current state, facilitating the sheath tube to bend and deform according to the airway environment. The sheath tube provided by the present application can adjust the softness and hardness, and the adjustment process is flexible and efficient, which helps to be applicable to airways of different sizes and shapes, making the diagnosis and treatment operations based on bronchoscopes simpler and more reliable.

[0068] It can be understood that for the purpose of realizing the bendable deformation setting of the insertion tube 110, the insertion tube 110 can specifically be made of, for example, a stainless steel hose or a polymer material hose. In this way, the insertion tube 110 can have both sufficient softness and sufficient structural strength.

[0069] And for the purpose of realizing that the hardness of the adjustment tube 130 is greater than that of the insertion tube 110, specifically, the adjustment tube 130 can be made of a rigid steel pipe or a polymer material hard pipe. Among them, when both the insertion tube 110 and the adjustment tube 130 are made of polymer materials, the hardness of the polymer material making the insertion tube 110 is less than the hardness of the polymer material making the adjustment tube 130.

[0070] It should be noted that the materials making the insertion tube 110 and the adjustment tube 130 can be differentially set as described above to achieve the purpose that the hardness of the adjustment tube 130 is greater than that of the insertion tube 110. At this time, the structural parameters corresponding to the insertion tube 110 and the adjustment tube 130 can be set the same or differently.

[0071] Alternatively, the materials making the insertion tube 110 and the adjustment tube 130 can be set the same. At this time, for the purpose of realizing that the hardness of the adjustment tube 130 is greater than that of the insertion tube 110, the structural parameters of the insertion tube 110 and the adjustment tube 130 can be adjusted. For example, it can be but not limited to adjusting the wall thickness of the insertion tube 110 to be less than the wall thickness of the adjustment tube 130. And / or local hollowing can be performed on the insertion tube 110. For example, long holes are opened along the circumferential direction of the local part of the insertion tube 110.

[0072] Of course, regardless of whether there are differences in the material and structural parameters of the insertion tube 110 and the material and structural parameters of the adjustment tube 130, other structures can also be additionally provided on the surface or inside of the adjustment tube 130 to enhance the hardness of the adjustment tube 130. For example, a reinforcing layer is attached to the outer surface and / or inner surface of the adjustment tube 130. The hardness of the reinforcing layer is relatively large and sufficient to meet the requirements.

[0073] In addition, the adjustment tube 130 in the above can be located radially inside the insertion tube 110:

[0074] Specifically, when the outer diameter of the adjustment tube 130 is smaller than the inner diameter of the insertion tube 110, the adjustment tube 130 can be movably inserted into the tube of the insertion tube 110.

[0075] Or when the inner diameter of the adjustment tube 130 is larger than the inner diameter of the insertion tube 110 and the outer diameter of the adjustment tube 130 is smaller than the outer diameter of the outer tube body, a slot can be opened from the back to the front at the tube wall of the insertion tube 110. The adjustment tube 130 is movably inserted through the slot. In this way, when the adjustment tube 130 does not move forward to cover the insertion tube 110, the setting of the slot can appropriately reduce the hardness of the insertion tube 110 itself, that is, increase the softness of the insertion tube 110, so that the insertion tube 110 can be easily bent and deformed. Moreover, the setting of the slot can make the forward and backward movement of the adjustment tube 130 occur inside the insertion tube 110. The overall outer diameter of the inner insertion tube 100 will not change.

[0076] The adjustment tube 130 in the above can also be located radially outside the insertion tube 110. That is, specifically, the inner diameter of the adjustment tube 130 is set to be larger than the outer diameter of the insertion tube 110. At this time, when the hardness requirements are sufficiently met through, for example, the differentiated setting of the above materials, the wall thickness of the adjustment tube 130 can be set to be smaller to form a thin-walled tube with a relatively large hardness. In this way, when the adjustment tube 130 moves forward to completely cover the insertion tube 110, the increased outer diameter of the inner insertion tube 100 will not change too much.

[0077] It should be noted that the above adjustment tube 130 can be directly set as a tube, and during its forward and backward movement, it can integrally cover the insertion tube 110 along the circumferential direction. Or at least a part of the above adjustment tube 130 can be set as non-tubular. For example, in an embodiment, the adjustment tube 130 includes a sleeve connection section and reinforcing ribs. The sleeve connection section is arranged around the circumference of the insertion tube 110. The reinforcing ribs extend along the front-back direction and are connected to the sleeve connection section. The radial cross-sectional area of the reinforcing ribs is in the shape of an annular installation notch 211 and does not extend around the entire circumference of the insertion tube 110. At this time, the reinforcing ribs can enhance the hardness of a part of the insertion tube 110 in the circumferential direction. The sleeve connection section can be set to one or at least two. And any sleeve connection section can be connected to any suitable position of the reinforcing ribs.

[0078] In addition, in the front-back direction, the hardness of the above-mentioned adjusting tube 130 can be set to be the same. Or in the front-back direction, the hardness of the above-mentioned adjusting tube 130 can be set differently in sections. For example, the adjusting tube 130 includes a first tube section and a second tube section. The hardness of the first tube section is greater than that of the second tube section. In this way, when the adjusting tube 130 moves forward to completely cover the insertion tube 110, different hardness enhancements can be formed at different tube sections of the insertion tube 110 in the front-back direction. Especially when the insertion tube 110 includes an active bending section and a passive bending section in the front-back direction, or when the insertion tube 110 includes a bending section and a non-bending section in the front-back direction, different hardness enhancements can be specifically performed on the active bending section, the passive bending section, the bending section, and the non-bending section.

[0079] In addition, the above-mentioned adjusting tube 130 includes at least two tube layers sleeved on each other from the inside to the outside, and any tube layer can be movably adjusted in the front-back direction relative to the insertion tube 110. It can be understood that since each single tube layer can move in the front-back direction relative to the insertion tube 110. This makes the more tube layers move forward and cover the same tube section of the insertion tube 110, the greater the degree of hardness enhancement and the more hardness increment at this tube section. On the contrary, the fewer tube layers move forward and cover the same tube section of the insertion tube 110, the smaller the degree of hardness enhancement and the less hardness increment at this tube section. In this way, the adjustment of the soft hardness of the inner insertion tube 100 can be made more flexible.

[0080] Based on one or several of the above embodiments, further, the inner insertion tube 100 further includes a fixing part 141 and a fixing and cooperating part 142. The fixing part 141 is arranged on the fixing seat 121 and / or the insertion tube 110, and the fixing and cooperating part 142 is arranged on the adjusting tube 130. After the adjusting tube 130 moves forward and approaches the fixing seat 121, the fixing and cooperating part 142 and the fixing part 141 are connected to limit the adjusting tube 130 at the current position. When the fixing part 141 and the fixing and cooperating part 142 are separated, they will not interfere with the front-back movement of the adjusting tube 130 relative to the insertion tube 110, ensuring that the front-back movement of the adjusting tube 130 is smoother and unobstructed. When the fixing part 141 and the fixing and cooperating part 142 are connected, the connection and fixation of the adjusting tube 130 and the insertion tube 110 can be realized synchronously. In this way, abnormal situations of the adjusting tube 130 moving backward relative to the insertion tube 110 during the interventional diagnosis and treatment process can be avoided.

[0081] It should be noted that the above-mentioned fixing part 141 and fixing and cooperating part 142 can only limit the adjusting tube 130 and the insertion tube 110 in the front-back direction. Or the above-mentioned fixing part 141 and fixing and cooperating part 142 can further limit the adjusting tube 130 and the insertion tube 110 in the circumferential direction. That is, when the fixing part 141 and the fixing and cooperating part 142 are connected, it can be ensured that the adjusting tube 130 and the insertion tube 110 will not rotate relative to each other at the same time.

[0082] There are various specific solutions for the fixing part 141 and the fixing and mating part 142:

[0083] For example, the fixing part 141 and the fixing and mating part 142 are structures that can be magnetically attracted to each other. For example, both the fixing part 141 and the fixing and mating part 142 are magnetic parts. Or one of the fixing part 141 and the fixing and mating part 142 is a magnetic part, and the other is a structure made of a metal material containing iron, cobalt, and nickel. Specifically, in one embodiment, the fixing part 141 is a magnetic part provided on the fixing base 121 and / or the insertion tube 110. The magnetic part can be connected to the outer circumference or the inner circumference of the radial direction of the fixing base 121 and / or the insertion tube 110. Or the magnetic part can be connected to the rear end of the fixing base 121. The adjustment tube 130 is made of a metal material containing iron, cobalt, and nickel, and at least a partial pipe section of the adjustment tube 130 constitutes the fixing and mating part 142. For example, the adjustment tube 130 is directly made of a steel material containing iron, cobalt, and nickel, which can not only be magnetically adsorbed to the magnetic part but also ensure sufficient hardness.

[0084] Or for example, one of the rear end of the fixing base 121 and the front end of the adjustment tube 130 is provided with a slot, and the other is provided with a plug projection, and the slot and the plug projection are inserted and connected. Specifically, in one embodiment, the outer diameter of the rear end of the fixing base 121 is larger than the outer diameter of the adjacent insertion tube 110, and a slot is recessed backward, and the slot constitutes the fixing part 141; the front end of the adjustment tube 130 protrudes forward with a plug projection, and the plug projection constitutes the fixing and mating part 142. The outer surface of the radial direction of the plug projection can be set as an inclined surface or a convex arc surface to form a relatively smooth transition and avoid structural interference with the surrounding sides.

[0085] At least the part of the fixing base 121 where the slot is opened and / or at least the plug projection is made of an elastic material, and the inner diameter of the slot is smaller than the outer diameter of the plug projection. Specifically, when the part where the slot is formed is made of an elastic material, the slot width can be set to be relatively small, equivalent to a slit. In this way, when the plug projection is not inserted, the slit is basically in a closed state and no dirt on the surrounding sides will be mixed in. And when the plug projection is driven by an external force to be inserted, the slit can be opened to realize the insertion connection between the two. At this time, the elastic material can apply sufficient extrusion force to the plug projection to enhance the insertion strength between the plug projection and the slot.

[0086] In view of the above, when in the first state, the imaging device 120 can protrude forward beyond the front end opening of the second tube body 160. Or the imaging device 120 can be accommodated in the second tube body 160 and be flush with the front end opening of the second tube body 160. Or the imaging device 120 can be accommodated in the second tube body 160 and be retracted backward relative to the front end opening of the second tube body 160. When the imaging device 120 is retracted backward relative to the front end opening of the second tube body 160, its specific structure can refer to the following outer insertion tube and will not be elaborated.

[0087] Next, please combine with Figures 1 to 3 , and Figures 4 to 6 , and the following will specifically describe the outer cannula. At least two outer cannulas are provided. For ease of understanding, in the following embodiments, the hierarchical interventional tube assembly is specifically defined to include a first outer cannula 200a close to the inner cannula 100 and a second outer cannula 200b far from the inner cannula 100.

[0088] First of all, it should be noted that the structures of the first outer cannula 200a and the second outer cannula 200b can be set differently according to actual needs. Or the structures of the first outer cannula 200a and the second outer cannula 200b can be set the same.

[0089] Since at least the imaging surface of the imaging device 120 is retracted inside the outer cannula, for ease of understanding, it is defined that when the inner cannula 100 is in the first state, or when both the inner cannula 100 and the first outer cannula 200a are in the first state, the outer cannula includes a front tube section 201 located on the front side of the imaging surface and a rear tube section 202 located on the rear side of the imaging surface. The front tube section 201 includes an imaging tube wall section 201a and a liquid passing tube wall section 201b arranged in sequence along its circumferential direction. The imaging tube wall section 201a is arranged adjacent to the imaging surface and is made of a transparent material. In this way, the imaging tube wall section 201a can be made transparent and visible, and will not affect the imaging process of the imaging device 120.

[0090] The central angle of the imaging tube wall section 201a is not less than 90°. Specifically, the central angle of the imaging tube wall section 201a can be set at about 90° to 120°. This angle range is more suitable for the imaging requirements of the imaging device 120 in actual applications, so as to sufficiently ensure the imaging quality of the bronchoscope.

[0091] It should be noted that according to actual needs, the liquid passing tube wall section 201b and / or the rear tube section 202 can also be made of a transparent material, so that the overall structure of the outer cannula is unified and it is easier to process and form.

[0092] The above-mentioned front pipe section 201 at least forms the part of the liquid-passing pipe wall section 201b, and the rear pipe section 202 can be integrally formed. Or the part of the front pipe section 201 that at least forms the liquid-passing pipe wall section 201b and the rear pipe section 202 can be obtained by detachable or non-detachable connection after being separately formed. Specifically, the outer cannula includes a main body 210 and a perspective member 220. Among them, a front-end part of the main body 210 is recessed backward to form an installation notch 211, so that the pipe section of the main body 210 located behind the installation notch 211 forms the rear pipe section 202, and the pipe wall section of the main body 210 located on the radial side of the installation notch 211 forms the liquid-passing pipe wall section 201b. The perspective member 220 includes a main body 221 inserted at the installation notch 211 and extension arms 222 protruding from the front end of the main body 221 toward both circumferential sides respectively. The extension arms 222 cover a local front end of the liquid-passing pipe wall section 201b, and the front-end surface of the extension arms 222 is arranged in a convex arc shape. At least the main body 221 of the perspective member 220 forms the imaging pipe wall section 201a.

[0093] The perspective member 220 can be directly inserted and connected to the main body 210. Specifically, the perspective member 220 may further include a plugging protrusion 223. The plugging protrusion 223 is inserted into the front-end pipe orifice of the main body 210. The outer diameter of the plugging protrusion 223 is generally slightly smaller than the outer diameter of the main body 221, so that after the plugging is completed, the outer diameter of the main body 221 and the outer diameter of at least the adjacent part of the main body 210 are adapted for smooth transition connection, avoiding the formation of a step or a sharp protrusion structure. The extension arms 222 can form a relatively smooth front-end surface. Similarly, it can also avoid the formation of a sharp protrusion structure at the front end of the main body 210.

[0094] Furthermore, the outer cannula is provided with a liquid-passing channel 204 running through in the front-rear direction, and the liquid-passing channel 204 is opened at the liquid-passing pipe wall section 201b. Of course, according to actual needs, the liquid-passing channel 204 can be opened at the entire rear pipe section 202 and the liquid-passing pipe wall section 201b of the front pipe section 201. In this way, the radial cross-sectional area of the liquid-passing channel 204 at the rear pipe section 202 can be larger, allowing more liquid to flow through.

[0095] The graded intervention tube body assembly further includes a seat body installed at the rear end of each sheath tube, and the liquid-passing channel 204 runs through the side wall of the seat body backward. The above-mentioned traction channel 206 can also run through the side wall of the seat body, so that the traction wire 400 can pass through the side wall of the seat body.

[0096] Specifically, in one embodiment, each outer cannula is respectively provided with a liquid passage 204. The seat body is provided with at least two corresponding to each liquid passage 204, and each seat body is sequentially connected to the rear end of each sheath tube along the front-rear direction, so that each liquid passage 204 is independent of each other. For example, the seat body of the first outer cannula 200a is the first seat body 310. The seat body of the second outer cannula 200b is the second seat body 320. The first seat body 310 is located on the front side of the second seat body 320.

[0097] After each liquid passage 204 is independently arranged through different seat bodies, the flow state of the liquid in each channel can be specifically set according to actual needs. For example, the liquid passages 204 at the first outer cannula 200a and the second outer cannula 200b both suck out liquid. Or the liquid passages 204 at the first outer cannula 200a and the second outer cannula 200b both perfuse liquid inward. Or one of the liquid passages 204 at the first outer cannula 200a and the second outer cannula 200b sucks out liquid, and the other perfuses liquid inward.

[0098] Similarly to the above, one of each adjacent two sheath tubes is provided with a connecting portion 231, and the other is provided with a docking portion 232. In the first state, the connecting portion 231 and the docking portion 232 are detachably connected. Generally, the connecting portion 231 and the docking portion 232 are arranged in pairs in each adjacent two sheath tubes. However, for the sake of understanding, in the structure shown in the figure, specifically, the connecting portion 231 is arranged at the inner cannula 100, and the docking portion 232 is arranged at the outer cannula as an example for identification. However, it can be understood that this does not constitute a limitation on the assembly scheme of the connecting portion 231 and the docking portion 232.

[0099] Among them, the connecting portion 231 and the docking portion 232 are mechanically connected and can be separated when the external force is not less than a preset threshold. For example, when the driving mechanism is arranged as described above, the external force applied to the sheath tube by adjusting the driving mechanism can be used to realize the connection and separation of the connecting portion 231 and the docking portion 232.

[0100] At this time, there are various specific schemes for the connecting portion 231 and the docking portion 232. For example, reference can be made to the above-mentioned fixing portion 141 and fixing and cooperating portion 142. Specifically, in one embodiment, the connecting portion 231 and the docking portion 232 are respectively a magnetic attracting member and a magnetic cooperating member that can be magnetically attracted. The magnetic cooperating member can be another magnetic attracting member or a structure made of a material containing iron, cobalt, and nickel.

[0101] And / or, the connecting part 231 and the docking part 232 are electrically controlled to be connected and can be separated when a preset electrical signal is received. Specifically, for example, one of the connecting part 231 and the docking part 232 can be an electromagnet, and the other can be a magnetic matching structure that cooperates with the electromagnet. When the electromagnet is energized, it can be magnetically adsorbed to the magnetic matching structure. Conversely, when the electromagnet is de-energized, it can be separated from the magnetic matching structure.

[0102] It should be noted that when the above-mentioned scheme of the electromagnet and the magnetic matching structure is adopted, it is preferably arranged between every two adjacent outer cannulas. And it is preferably not arranged between the first outer cannula 200a and the inner cannula 100 to avoid the electromagnetic field affecting the normal operation of the imaging device 120.

[0103] When the fluoroscopic member 220 includes the main body 221, the extending arm 222 and the inserting protrusion 223 as described above, further, the fluoroscopic member 220 can also be provided with an insertion port 224 at the inserting protrusion 223. The insertion port 224 can form an avoidance space for installing, for example, the docking part 232 of the outer cannula at the position where it is located.

[0104] In addition, the connecting part 231 provided at the inner cannula 100 is preferably connected to the imaging device 120 in a linked manner, so that when the inner cannula 100 is in the third state and the imaging device 120 and the insertion tube 110 are maintained within the operation channel 205 of the outer cannula, the imaging device 120 can still be maintained in a fixed connection relative to the outer cannula.

[0105] Further, when the paired connecting part 231 and the docking part 232 are universal, specifically, for example, the connecting part 231 provided at the inner cannula 100 can be connected to the docking part 232 provided at the first outer cannula 200a, or can also be connected to the docking part 232 provided at the second outer cannula 200b. Then when the first outer cannula 200a is in the third state, and at least the imaging device 120 of the inner cannula 100 can be maintained within the second outer cannula 200b and can still be connected to the docking part 232 provided at the second outer cannula 200b. In this way, the second outer cannula 200b in the current state is still equipped with the imaging device 120 and can be used for imaging diagnosis and treatment.

[0106] The above are only the preferred embodiments of the present invention, and do not limit the patent scope of the present invention accordingly. All equivalent structural transformations made under the inventive concept of the present invention by using the content of the specification and drawings of the present invention, or directly / indirectly applied in other related technical fields are included in the patent protection scope of the present invention.

Claims

1. A hierarchical interventional tube assembly, characterized in that: It comprises a plurality of sheath tubes which are sequentially sleeved from the inside to the outside, and each of the sheath tubes is provided with an operation channel in the front-to-back direction; Among them, in every two adjacent sheath tubes, the sheath tube located on the inner side has a first state of being accommodated in the operating channel of the sheath tube located on the outer side, a second state of being moved forward and extended from the operating channel of the sheath tube located on the outer side, and a third state of being moved backward and detached from the operating channel of the sheath tube located on the outer side.

2. The hierarchical interventional catheter assembly according to claim 1, characterized in that: At least one of the sheath tubes is an inner cannula, and the inner cannula comprises: An insertion tube is arranged to extend in the front-rear direction, and at least a partial tube section of the insertion tube is made of a flexible and bendable material so that the insertion tube can be deformed and arranged sideways; and The imaging device comprises a fixing seat and an imaging module accommodated in the fixing seat. The fixing seat is fixed at the front end of the insertion tube, and the imaging surface of the imaging module is exposed forward.

3. The hierarchical interventional tube assembly according to claim 2, characterized in that: The inner tube comprises a first tube body and a second tube body arranged side by side, the first tube body is provided with the operation channel in the front-to-back direction, the second tube body is provided with a wiring channel in the front-to-back direction, the wiring channel is used for installing the insertion tube and the imaging device, and for passing the cables of the imaging module; The first tube body and the second tube body are fixedly connected, or the first tube body and the second tube body are detachably connected.

4. The hierarchical interventional catheter assembly according to claim 3, characterized in that: The first tube body and the second tube body are detachably connected, and in the third state, the first tube body moves backward and detaches; The second tube body, the insertion tube and the imaging device are linked to be synchronously accommodated in the sheath tube located outside thereof or can be moved backward and separated; or, The insertion tube and the imaging device are linked to be synchronously accommodated in the second tube body or can be moved backward and separated.

5. The hierarchical interventional catheter assembly according to claim 2, wherein: Each of the sheath tubes includes the inner layer cannula and at least two outer layer cannulae located outside the inner layer cannula.

6. The hierarchical interventional catheter assembly according to any one of claims 2 to 5, characterized in that: The inner layer insert tube also includes an adjusting tube, which is sleeved on the insert tube in a movably adjustable manner along the front-back direction, and the hardness of the adjusting tube is greater than the hardness of the insert tube.

7. The hierarchical interventional catheter assembly according to claim 1, wherein: One of every two adjacent sheath tubes is provided with a connecting portion, and the other is provided with a docking portion, and in the first state, the connecting portion and the docking portion are detachably connected; The connecting portion and the docking portion are mechanically connected and can be separated when the external force is not less than a preset threshold; and / or, The connecting portion and the docking portion are electrically connected and can be separated upon receiving a preset electrical signal.

8. The hierarchical interventional catheter assembly according to claim 2, wherein: One of every two adjacent sheath tubes is provided with a connecting portion, and the other is provided with a docking portion, and in the first state, any one of the connecting portions and any one of the docking portions can be detachably connected; Wherein, in the sheath tube provided with the imaging device, the connecting portion or the docking portion is linked and connected with the imaging device.

9. A bronchial endoscope, characterized in that: It comprises an operating component and a graded interventional catheter assembly as described in any one of claims 1 to 8.

10. The bronchial endoscope according to claim 9, characterized in that The bronchoscope further includes a driving mechanism, which is disposed on the operating component and connected to each of the sheath tubes to drive each of the sheath tubes to switch between the first state, the second state and the third state.

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