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 bronchial endoscopes, and in particular to a graded interventional tube assembly and a bronchial endoscope. Background Art

[0002] A bronchoscope is a medical device used to observe the internal structure of the airways and diagnose and treat respiratory diseases. It enters the airways through natural cavities, allowing for visual inspection of tracheal, bronchi, and lung lesions, and supporting procedures such as biopsy and interventional therapy.

[0003] Because bronchi have airways of various sizes, existing bronchoscopes typically have insertion tubes of different sizes specifically designed for each airway size in order to provide targeted treatment. However, this significantly increases the inconvenience of diagnosis and treatment. Summary of the Invention

[0004] The main purpose of the present invention is to propose a graded interventional tube assembly and a bronchoscope, aiming to solve the problem that traditional bronchoscopes cannot be used for airways of different sizes, resulting in inconvenience in operation.

[0005] To achieve the above-mentioned purpose, the present invention proposes a hierarchical interventional catheter assembly, comprising a plurality of sheath tubes sequentially sleeved from the inside to the outside, each of the sheath tubes being provided with an operating channel in the front-to-back direction;

[0006] Among them, in each 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.

[0007] Optionally, at least one of the sheath tubes comprises:

[0008] An insertion tube is arranged to extend in the front-to-back direction, and at least a partial 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

[0009] 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.

[0010] Optionally, the inner tube includes a first tube body and a second tube body arranged side by side, the first tube body having the operation channel extending in the front-to-back direction, and the second tube body having a wiring channel extending in the front-to-back direction, the wiring channel being used for installing the insertion tube and the imaging device, and for passing cables of the imaging module;

[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 and detaches;

[0013] 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,

[0014] 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.

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

[0016] Optionally, the inner layer cannula further includes an adjusting tube, which is movably and adjustably sleeved on the insertion tube in a front-to-back direction, and the hardness of the adjusting tube is greater than the hardness of the insertion tube.

[0017] Optionally, 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;

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

[0019] The connecting portion and the docking portion are electrically connected and can be separated upon receiving a preset electrical signal.

[0020] Optionally, 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;

[0021] Wherein, in the sheath tube provided with the imaging device, the connecting portion or the docking portion is linked to the imaging device.

[0022] In addition, to achieve the above-mentioned purpose, the present invention also provides a bronchial endoscope, comprising an operating component and the graded interventional tube assembly as described above.

[0023] Optionally, the bronchoscope further includes a driving mechanism, which is provided 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.

[0024] In the technical solution provided by the present invention, when the size of the airway currently being intervened is large and the softness requirement of the sheath is small, each sheath can be operated to be in the first state. When the size of the airway currently being intervened is reduced and / or the softness requirement is increased, the sheath located on the inside can be operated step by step to move to the second state according to actual needs, so that the sheath located on the inside with a relatively reduced outer diameter of the insertion tube and a relatively increased softness can be moved out from the sheath located on the outside, which is convenient for performing further interventional diagnosis and treatment operations. When the size of the airway currently being intervened is large but the softness requirement of the sheath is large, the sheath located on the inside can be operated step by step to move to the third state according to actual needs, so that the outer diameter of the insertion tube remains unchanged but the softness increases, which is convenient for performing further interventional diagnosis and treatment operations. The present invention is based on the same bronchial endoscope and can be flexibly combined to form insertion tubes of various specifications, which is more convenient for flexibly adapting to the different needs of the actual intervention environment, making the bronchial endoscope as a whole more versatile and reliable. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on the structures shown in these drawings without paying any creative work.

[0026] Figure 1 A three-dimensional schematic diagram of an embodiment of a graded interventional catheter assembly provided by the present invention;

[0027] Figure 2 for Figure 1 Schematic diagram of the enlarged structure at A in the middle;

[0028] Figure 3 for Figure 1 Axial schematic diagram of the middle graded interventional tube assembly;

[0029] Figure 4 for Figure 1 A three-dimensional schematic diagram of the middle and outer cannulas;

[0030] Figure 5 for Figure 4 Schematic diagram of the front end structure of the middle and outer layer cannula, in which the perspective piece is assembled to the main body;

[0031] Figure 6 for Figure 4 Schematic diagram of the front end structure of the middle and outer layer cannula, where the perspective piece is not assembled to the main body;

[0032] Figure 7 for Figure 1A three-dimensional schematic diagram of the insertion tube and the imaging device in the inner cannula;

[0033] Figure 8 for Figure 7 Schematic diagram of the enlarged structure at B in the middle;

[0034] Figure 9 for Figure 1 Axial schematic diagram of the middle inner layer cannula in the third state;

[0035] Figure 10 for Figure 1 An axial schematic diagram of the second embodiment with the middle inner layer cannula and the first outer layer cannula in the third state;

[0036] Figure 11 for Figure 1 Axial schematic diagram of the third embodiment with the middle inner layer cannula and the first outer layer cannula in the third state.

[0037] Description of Figure Numbers:

[0038] 100 inner layer cannula; 110 insertion tube; 120 imaging device; 121 fixing seat; 122 imaging module; 130 adjusting tube; 141 fixing part; 142 fixing matching part; 150 first tube body; 160 second tube body; 200a first outer layer cannula; 200b second outer layer cannula; 201 front tube section; 201a imaging tube wall section; 201b liquid tube wall section; 202 rear tube section; 203 wiring channel; 204 liquid channel; 205 operation channel; 206 traction channel; 210 main body; 211 installation notch; 220 perspective part; 221 main body; 222 extension arm; 223 plug-in protrusion; 224 plug interface; 231 connecting part; 232 docking part; 310 first seat body; 320 second seat body; 400 traction line.

[0039] The purpose, features and advantages of the present invention will be further described with reference to the accompanying drawings and in conjunction with the embodiments. DETAILED DESCRIPTION

[0040] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. All other embodiments obtained by ordinary technicians in this field based on the embodiments of the present invention without making any creative efforts shall fall within the scope of protection of the present invention.

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

[0042] In addition, if there are descriptions involving "first", "second", etc. 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 suggesting their relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of such features. In addition, the meaning of "and / or" appearing throughout the text includes three parallel schemes. Taking "A and / or B" as an example, it includes scheme A, or scheme B, or a scheme in which A and B are satisfied at the same time. In addition, the technical solutions between the various embodiments can be combined with each other, but it must be based on the ability of ordinary technicians in this field to implement. When the combination of technical solutions is mutually contradictory or cannot be implemented, it should be deemed that such a combination of technical solutions does not exist and is not within the scope of protection required by the present invention.

[0043] See also Figures 1 to 11 The present invention provides a hierarchical interventional tube assembly (hereinafter referred to as the insertion tube) and a bronchoscope used therein.

[0044] A bronchoscope generally consists of an operating unit and an insertion tube. For ease of understanding, the following examples illustrate a bronchoscope with both forward and backward orientations. The insertion tube extends forward and backward and is attached to the front end of the operating unit. During interventional procedures, at least the front end of the insertion tube is inserted into the patient's body. The operating unit is externally located and can be handheld by the operator.

[0045] In particular, the insert tube is generally at least partially adjustable for lateral bending, forming a lateral bending section. It is understood that the lateral bending characteristics of the lateral bending section can be directly defined by the material. For example, at least the lateral bending section of the insert tube can be made of a flexible, bendable material. Or further, at least the lateral bending section of the insert tube can be made of an elastic, bendable material. Of course, the lateral bending characteristics of the lateral bending section can also be defined by a special structure. For example, at least the lateral bending section of the insert tube can be composed of two single components that are movably hinged.

[0046] The lateral bending motion of the inserted tubular component can be achieved by a traction mechanism. Specifically, the traction mechanism can include a traction wire 400 and a reel. Accordingly, a traction channel 206 is defined in the inserted tubular component, extending rearward from at least the lateral bending section. The front section of the traction wire 400 is movably threaded through the traction channel 206. The front end of the traction wire 400 is fixedly connected to the sidewall of the lateral bending section. The rear section of the traction wire 400 is fixedly connected to the reel. In this manner, when the operator manually rotates the reel around its axis, or when a specific electronic control component automatically rotates the reel around its axis, the traction wire 400 can be driven to reel in or out. During the reeling phase, the traction wire 400 exerts a backward force, which applies force to the corresponding side of the lateral bending section, achieving lateral bending deformation. Conversely, during the release phase, the backward force of the traction wire 400 is released, allowing the lateral bending section to return to its original position, for example, due to elastic restoring forces. Alternatively, the traction wire 400 exerts a forward force, which causes the lateral bending section to return to its original position.

[0047] It should be noted that the above-mentioned insert tube can be bent in one direction or at least in two directions. When the insert tube can be bent in two directions, the two directions can be bent in opposite directions on the same radial direction of the insert tube.

[0048] When the inserted tube can be bent in four directions, in one embodiment, at least one sheath is made of a flexible and bendable material. The sheath is provided with a traction channel 206 along the front-to-back direction, and four traction channels 206 are provided. Among the four traction channels 206, two traction channels 206 are arranged on both sides of the sheath in the first radial direction, and the remaining two traction channels 206 are arranged on both sides of the sheath in the second radial direction. The graded interventional tube assembly also includes four traction wires 400, which are passed through the four traction channels 206 in a one-to-one correspondence, and the front end of each traction wire 400 is connected and fixed to the sheath, and the rear end is used to connect to an external driving component to move back and forth under the drive of the external driving component, so as to drive the sheath to bend and deform toward the side. The first radial direction and the second radial direction are at least cross-arranged. Furthermore, the first radial direction and the second radial direction can be arranged approximately vertically.

[0049] Specifically, please combine Figures 1 to 11 The graded interventional tube assembly includes a plurality of sheath tubes that are sequentially sleeved from the inside to the outside, and each sheath tube is provided with an operating channel 205 along the front-to-back direction; wherein, in each two adjacent sheath tubes, the sheath tube located on the inner side has a first state of being accommodated in the operating channel 205 of the sheath tube located on the outer side, a second state of being movable forward and extended from the operating channel 205 of the sheath tube located on the outer side, and a third state of being movable backward and detached from the operating channel 205 of the sheath tube located on the outer side.

[0050] In the technical solution provided by the present invention, when the size of the airway currently being intervened is large and the softness requirement of the sheath is small, each sheath can be operated to be in the first state. When the size of the airway currently being intervened is reduced and / or the softness requirement is increased, the sheath located on the inside can be operated step by step to move to the second state according to actual needs, so that the sheath located on the inside with a relatively reduced outer diameter of the insertion tube and a relatively increased softness can be moved out from the sheath located on the outside, which is convenient for performing further interventional diagnosis and treatment operations. When the size of the airway currently being intervened is large but the softness requirement of the sheath is large, the sheath located on the inside can be operated step by step to move to the third state according to actual needs, so that the outer diameter of the insertion tube remains unchanged but the softness increases, which is convenient for performing further interventional diagnosis and treatment operations. The present invention is based on the same bronchial endoscope and can be flexibly combined to form insertion tubes of various specifications, which is more convenient for flexibly adapting to the different needs of the actual intervention environment, making the bronchial endoscope as a whole more versatile and reliable.

[0051] It is understood that each sheath is generally provided with an operating channel 205 along the front-back direction. The operating channel 205 can be provided for example for diagnosis and treatment instruments. In each of adjacent two sheaths, the sheath located inside is movably provided with the operating channel 205 located outside.

[0052] The forward and backward movement of the inner sheath relative to the outer sheath can be directly achieved by manual operation by the operator. Alternatively, in one embodiment, the bronchial endoscope further includes a drive mechanism, which is disposed on the operating component and connected to each sheath to drive each sheath to switch between the first state, the second state, and the third state. In this way, the forward and backward movement of each sheath can be more precisely controlled and regulated with the help of the drive mechanism.

[0053] Please combine Figures 1 to 3 ,as well as Figures 7 to 11 , the inner layer cannula 100 will be described in detail below.

[0054] The inner layer cannula 100 may include an insertion tube 110 and an imaging device 120. The insertion tube 110 extends in a forward-backward direction. At least a portion of the insertion tube 110 is made of a flexible, bendable material, allowing the insertion tube 110 to bend and deform laterally. The imaging device 120 includes a mounting base 121 and an imaging module 122 housed within the mounting base 121. The mounting base 121 is fixed to the front end of the insertion tube 110. The imaging surface of the imaging module 122 is exposed forward.

[0055] It can be understood that the insertion tube 110 and the imaging device 120 can directly constitute the overall structure of the inner layer cannula 100 and be movably arranged inside the outer layer 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 operating 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 all move forward and extend from the outer tube. Alternatively, only the imaging device 120 and the insertion tube 110 may all move forward and extend from the outer tube, while the first tube 150 and the second tube 160 remain contained within the outer tube.

[0059] When the inner tube 100 is in the third state, the first tube 150, second tube 160, imaging device 120, and insertion tube 110 may all move backward and away from the outer tube. Alternatively, only the imaging device 120 and insertion tube 110 may all move backward and away from the outer tube, while the first tube 150 and second tube 160 remain contained within the outer tube.

[0060] Of course, the first tube body 150 and the second tube body 160 can be formed separately and connected in a detachable or non-detachable manner. 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 both separate and connected states.

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

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

[0063] When the inner tube 100 is in the third state, the first tube 150, second tube 160, imaging device 120, and insertion tube 110 may all move backward and away from the outer tube. Alternatively, only the imaging device 120 and insertion tube 110 may all move backward and away from the outer tube, while the first tube 150 and second tube 160 remain contained within the outer tube.

[0064] When in separation:

[0065] When the inner tube 100 is in the second state, specifically, the first tube 150, second tube 160, imaging device 120, and insertion tube 110 may all move forward and extend from the outer tube. Alternatively, only the imaging device 120 and insertion tube 110 may all move forward and extend from the outer tube, while the first tube 150 and second tube 160 remain contained within the outer tube. Alternatively, the first tube 150 may move forward and extend from the outer tube, while the second tube 160, insertion tube 110, and imaging device 120 remain contained within the outer tube. Alternatively, the second tube 160, insertion tube 110, and imaging device 120 may all move forward and extend from the outer tube, while the first tube 150 remains contained within the outer tube.

[0066] When the inner tube 100 is in the third state, specifically, the first tube 150, second tube 160, imaging device 120, and insertion tube 110 may all move backward and detach from the outer tube. Alternatively, only the imaging device 120 and insertion tube 110 may all move backward and detach from the outer tube, while the first tube 150 and second tube 160 remain contained within the outer tube. Alternatively, the first tube 150 may move backward and detach from the outer tube, while the second tube 160, insertion tube 110, and imaging device 120 remain contained within the outer tube. Alternatively, the second tube 160, insertion tube 110, and imaging device 120 may all move backward and detach from the outer tube, while the first tube 150 remains contained within the outer tube.

[0067] Furthermore, the inner layer cannula 100 may also include an adjustment tube 130. The adjustment tube 130 is movably adjustable in the front-back direction and is sleeved on the insertion tube 110. The hardness of the adjustment tube 130 is greater than the hardness of the insertion tube 110. By adjusting the adjustment tube 130 to move forward relative to the insertion tube 110 to be close to the fixing seat 121, the adjustment tube 130 is completely sleeved on the insertion tube 110. With the greater hardness of the adjustment tube 130, the hardness of the entire sheath tube in the current state is appropriately enhanced, which facilitates in-depth exploration after the sheath tube reaches the limit position. Conversely, by adjusting the adjustment tube 130 to move backward relative to the insertion tube 110 to be away from the fixing seat 121, the insertion tube 110 is directly exposed. With the softness of the insertion tube 110 itself, the softness of the entire sheath tube in the current state is appropriately enhanced, which facilitates the sheath tube to bend and deform according to the airway environment. The sheath provided in the present application can be adjusted in terms of softness and hardness, and the adjustment process is flexible and efficient, which helps to adapt to airways of different sizes and shapes, making the diagnosis and treatment operations based on bronchial endoscopy simpler and more reliable.

[0068] It is understood that in order to achieve the purpose of the bendable and deformable setting of the insertion tube 110, the insertion tube 110 can 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 flexibility and sufficient structural strength.

[0069] To achieve the goal of making the hardness of the adjustment tube 130 greater than the hardness of the insertion tube 110, the adjustment tube 130 can be made of a hard steel tube or a hard polymer tube. When both the insertion tube 110 and the adjustment tube 130 are made of polymer materials, the hardness of the polymer material of the insertion tube 110 is less than the hardness of the polymer material of the adjustment tube 130.

[0070] It should be noted that the materials used to make the insertion tube 110 and the materials used to make the adjustment tube 130 can be differentiated, for example, as described above, to achieve a greater hardness for the adjustment tube 130 than for the insertion tube 110. In this case, the structural parameters of the corresponding insertion tube 110 and adjustment tube 130 can be the same or different.

[0071] Alternatively, the material used to make the insert tube 110 and the material used to make the adjustment tube 130 can be the same. In this case, to achieve a greater hardness for the adjustment tube 130 than for the insert tube 110, the structural parameters of the insert tube 110 and the adjustment tube 130 can be adjusted. For example, but not limited to, the wall thickness of the insert tube 110 can be adjusted to be smaller than that of the adjustment tube 130. Furthermore, the insert tube 110 can be partially hollowed out. For example, an elongated hole can be provided along the circumference of the insert tube 110.

[0072] Of course, regardless of whether the materials and structural parameters of the insertion tube 110 and the materials and structural parameters of the adjustment tube 130 differ, the hardness of the adjustment tube 130 can be enhanced by adding additional structures to the surface or interior of the adjustment tube 130. For example, a reinforcement layer can be applied to the outer and / or inner surfaces of the adjustment tube 130. The reinforcement layer has a relatively high hardness and is sufficient to meet the requirements.

[0073] In addition, the adjustment tube 130 described above may 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 insertion tube 110 .

[0075] Alternatively, 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 groove can be formed from the back to the front of the tube wall of the insertion tube 110. The adjustment tube 130 is movably inserted into the groove. In this way, when the adjustment tube 130 does not move forward to cover the insertion tube 110, the groove 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. In addition, the groove can ensure that the forward and backward movement of the adjustment tube 130 occurs inside the insertion tube 110. The outer diameter of the inner layer insertion tube 100 as a whole does not change.

[0076] The adjustment tube 130 described above can also be located radially outward from the insertion tube 110. Specifically, the inner diameter of the adjustment tube 130 can be larger than the outer diameter of the insertion tube 110. In this case, if the required hardness is sufficiently met through, for example, the differentiated material selection described above, the wall thickness of the adjustment tube 130 can be reduced, resulting in a thinner tube with greater hardness. This ensures that when the adjustment tube 130 moves forward to completely cover the insertion tube 110, the outer diameter of the inner tube 100 does not change significantly.

[0077] It should be noted that the above-mentioned adjustment tube 130 can be directly set to be tubular, and in the process of its forward and backward movement, it completely covers the insertion tube 110 along the circumferential direction. Or at least a part of the above-mentioned adjustment tube 130 can be set to be non-tubular. For example, in one embodiment, the adjustment tube 130 includes a sleeve tube section and a reinforcing rib. The sleeve tube section is arranged around the circumference of the insertion tube 110. The reinforcing rib extends in the forward and backward direction and is connected to the sleeve tube section. The radial cross-sectional area of ​​the reinforcing rib is in the shape of a ring of the mounting notch 211 and is not arranged around the entire circumference of the insertion tube 110. In this case, the reinforcing rib can enhance the hardness of the local circumferential direction of the insertion tube 110. The sleeve tube section can be set to one or at least two. And any sleeve tube section can be connected to any suitable position of the reinforcing rib.

[0078] In addition, the hardness of the adjustment tube 130 can be set to be the same in the front-to-back and upward directions. Or, the hardness of the adjustment tube 130 can be set to be differentiated in sections in the front-to-back and upward directions. For example, the adjustment tube 130 includes a first tube section and a second tube section. The hardness of the first tube section is greater than the hardness of the second tube section. In this way, when the adjustment 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-to-back and upward directions. In particular, when the insertion tube 110 includes an active lateral bending section and a passive lateral bending section in the front-to-back direction, or when the insertion tube 110 includes a lateral bending section and a non-lateral bending section in the front-to-back direction, different hardness enhancements can be performed on the active lateral bending section, the passive lateral bending section, the lateral bending section, and the non-lateral bending section in a targeted manner.

[0079] Furthermore, the aforementioned adjustment tube 130 comprises at least two tube layers that are sequentially sleeved from the inside out, and any of these tube layers can be adjusted forward and backward relative to the insertion tube 110. It will be appreciated that, since each tube layer can be moved forward and backward relative to the insertion tube 110, the greater the number of tube layers that move forward and wrap around the same section of the insertion tube 110, the greater the degree of hardness enhancement and the greater the hardness increment. Conversely, the fewer the number of tube layers that move forward and wrap around the same section of the insertion tube 110, the less degree of hardness enhancement and the smaller the hardness increment. This allows for greater flexibility in adjusting the hardness of the inner tube 100.

[0080] Based on one or more of the above embodiments, the inner layer cannula 100 further includes a fixing portion 141 and a fixing fitting portion 142. The fixing portion 141 is provided on the fixing seat 121 and / or the insertion tube 110, and the fixing fitting portion 142 is provided on the adjustment tube 130. After the adjustment tube 130 moves forward to approach the fixing seat 121, the fixing fitting portion 142 is connected to the fixing portion 141 to limit the adjustment tube 130 at its current position. When the fixing portion 141 and the fixing fitting portion 142 are separated, they will not interfere with the forward and backward movement of the adjustment tube 130 relative to the insertion tube 110, ensuring that the forward and backward movement of the adjustment tube 130 is smoother and more unobstructed. When the fixing portion 141 and the fixing fitting portion 142 are connected, the connection and fixation of the adjustment tube 130 and the insertion tube 110 can be achieved simultaneously. In this way, the abnormal situation of the adjustment tube 130 moving backward relative to the insertion tube 110 during interventional diagnosis and treatment can be avoided.

[0081] It should be noted that the fixing portion 141 and the fixing fitting portion 142 can only limit the front-to-back and upward positions of the adjustment tube 130 and the insertion tube 110. Alternatively, the fixing portion 141 and the fixing fitting portion 142 can further limit the circumferential positions of the adjustment tube 130 and the insertion tube 110. In other words, when the fixing portion 141 and the fixing fitting portion 142 are connected, they can simultaneously prevent the adjustment tube 130 and the insertion tube 110 from rotating relative to each other.

[0082] There are many specific solutions for the fixing portion 141 and the fixing matching portion 142:

[0083] For example, the fixing portion 141 and the fixed fitting portion 142 are structures that can be magnetically matched with each other. For example, the fixing portion 141 and the fixed fitting portion 142 are both magnetic parts. Or one of the fixing portion 141 and the fixed fitting portion 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 portion 141 is a magnetic part provided on the fixing seat 121 and / or the insertion tube 110. The magnetic part can be connected to the radial outer side or radial inner side of the fixing seat 121 and / or the insertion tube 110. Or the magnetic part can be connected to the rear end of the fixing seat 121. The adjusting tube 130 is made of a metal material containing iron, cobalt and nickel, and at least a partial section of the adjusting tube 130 constitutes the fixed fitting portion 142. For example, the adjusting tube 130 is directly made of steel containing iron, cobalt and nickel, which can not only be magnetically attracted to the magnetic part, but also ensure sufficient hardness.

[0084] Alternatively, for example, one of the rear end of the fixing base 121 and the front end of the adjustment tube 130 may be provided with a slot, while the other may be provided with a protrusion, with the slot and protrusion being inserted and connected. Specifically, in one embodiment, the rear end of the fixing base 121 has an outer diameter greater than that of the adjacent insertion tube 110, and a slot is provided, which is recessed rearward and forms the fixing portion 141. The front end of the adjustment tube 130 has a protrusion, which is protruding forward and forms the fixing mating portion 142. The radial outer surface of the protrusion can be configured as an inclined surface or a convex arc surface, creating a relatively smooth transition and avoiding structural interference with the surrounding side.

[0085] At least the portion of the fixing base 121 defining the slot and / or at least the insertion protrusion are made of an elastic material, and the inner diameter of the slot is smaller than the outer diameter of the insertion protrusion. Specifically, when the portion defining the slot is made of an elastic material, the slot width can be set to be relatively small, equivalent to a slit. This ensures that when the insertion protrusion is not inserted, the slit is essentially closed, preventing the entry of surrounding dirt. However, when the insertion protrusion is inserted by an external force, the slit is expanded, enabling the insertion of the two. The elastic material then applies sufficient compressive force to the insertion protrusion, enhancing the connection strength between the insertion protrusion and the slot.

[0086] In view of the above, when in the first state, the imaging device 120 can protrude forward from the front end of the second tube body 160. Alternatively, the imaging device 120 can be housed within the second tube body 160 and aligned with the front end of the second tube body 160. Alternatively, the imaging device 120 can be housed within the second tube body 160 and retracted rearward relative to the front end of the second tube body 160. When the imaging device 120 retracts rearward relative to the front end of the second tube body 160, its specific structure can be referred to in the outer layer cannula described below and will not be further described.

[0087] Then please combine Figures 1 to 3 ,as well as Figures 4 to 6 The following will specifically describe the outer cannula. At least two outer cannulae are provided. For ease of understanding, in the following embodiments, the hierarchical interventional tube assembly is specifically defined as comprising a first outer cannula 200a located proximal to the inner cannula 100 and a second outer cannula 200b located distal to the inner cannula 100.

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

[0089] Since at least the imaging surface of the imaging device 120 is retracted within 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 segment 201 located in front of the imaging surface and a rear tube segment 202 located behind the imaging surface. The front tube segment 201 includes an imaging wall segment 201a and a fluid-passing wall segment 201b arranged sequentially along its circumference. The imaging wall segment 201a is positioned adjacent to the imaging surface and is made of a transparent material. This allows the imaging wall segment 201a to be transparent and visually visible, without interfering with the imaging process of the imaging device 120.

[0090] The arc center angle of the imaging tube wall segment 201a is not less than 90°. Specifically, the arc center angle of the imaging tube wall segment 201a can be set to approximately 90° to 120°. This angle range is more suitable for the imaging requirements of the imaging device 120 in actual applications, thereby sufficiently ensuring the imaging quality of the bronchial endoscope.

[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 transparent materials, thereby making the overall structure of the outer layer cannula unified and easier to process and shape.

[0092] The front tube section 201, which at least constitutes the portion of the liquid-passing wall section 201b, and the rear tube section 202 can be integrally formed. Alternatively, the front tube section 201, which at least constitutes the portion of the liquid-passing wall section 201b, and the rear tube section 202 can be separately formed and then detachably or non-detachably connected. Specifically, the outer tube includes a main body 210 and a transparent member 220. The front end of the main body 210 is partially recessed rearward to form a mounting notch 211, so that the section of the main body 210 located behind the mounting notch 211 constitutes the rear tube section 202, and the section of the main body 210 located radially to the side of the mounting notch 211 constitutes the liquid-passing wall section 201b. The perspective piece 220 includes a main body 221 inserted into the mounting notch 211, and extended arms 222 protruding from the front end of the main body 221 toward both sides of the circumference. The extended arms 222 are wrapped around the partial front end of the liquid-passing tube wall section 201b, and the front end surface of the extended arms 222 is arranged in a convex arc shape. At least the main body 221 of the perspective piece 220 constitutes the imaging tube 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 also include an insertion protrusion 223. The insertion protrusion 223 is inserted into the front end of the main body 210. The outer diameter of the insertion protrusion 223 is generally slightly smaller than the outer diameter of the main body 221, so that when the insertion is completed, the outer diameter of the main body 221 and the outer diameter of at least the adjacent portion of the main body 210 are compatible, forming a smooth transition connection and avoiding the formation of steps or sharp protrusions. The extended support arm 222 can form a relatively smooth front end surface. Similarly, the formation of sharp protrusions at the front end of the main body 210 can be avoided.

[0094] Furthermore, the outer tube is provided with a liquid passage 204 extending in the front-to-back direction. This passage 204 is located in the liquid passage wall section 201b. Of course, depending on actual needs, the passage 204 can be located throughout the entire rear tube section 202 or in the liquid passage wall section 201b of the front tube section 201. This allows the passage 204 to have a larger radial cross-sectional area in the rear tube section 202, allowing for more liquid flow.

[0095] The hierarchical interventional tube assembly further comprises a seat body mounted at the rear end of each sheath tube, with the fluid passage 204 extending rearwardly through the side wall of the seat body. The aforementioned traction passage 206 may also extend through the side wall of the seat body, allowing the traction line 400 to pass through the side wall of the seat body.

[0096] Specifically, in one embodiment, each outer cannula is provided with a fluid passage 204. At least two base bodies are provided, one corresponding to each fluid passage 204. Each base body is sequentially connected to the rear end of each sheath tube in the front-to-back direction, making each fluid passage 204 independent of the others. For example, the base body of the first outer cannula 200a is the first base body 310. The base body of the second outer cannula 200b is the second base body 320. The first base body 310 is located in front of the second base body 320.

[0097] When each liquid-passing channel 204 is independently arranged using different bases, the flow state of the liquid in each channel can be specifically configured according to actual needs. For example, the liquid-passing channel 204 on the first outer tube 200a and the liquid-passing channel 204 on the second outer tube 200b both pump liquid outward. Alternatively, the liquid-passing channel 204 on the first outer tube 200a and the liquid-passing channel 204 on the second outer tube 200b both pump liquid inward. Alternatively, one of the liquid-passing channel 204 on the first outer tube 200a and the liquid-passing channel 204 on the second outer tube 200b pumps liquid outward, while the other pumps liquid inward.

[0098] Similarly to the above, one of each two adjacent sheath tubes is provided with a connecting portion 231, and the other is provided with a docking portion 232. In a first state, the connecting portion 231 and the docking portion 232 are detachably connected. The connecting portion 231 and the docking portion 232 are generally provided in pairs in each of two adjacent sheath tubes. However, for ease of understanding, in the structure shown in the figure, the connecting portion 231 is provided on the inner layer cannula 100, and the docking portion 232 is provided on the outer layer cannula. However, it should be understood that this does not constitute a limitation on the assembly scheme of the connecting portion 231 and the docking portion 232.

[0099] The connecting portion 231 and the docking portion 232 are mechanically connected and can be separated when an external force is not less than a preset threshold. For example, when a driving mechanism is provided as described above, the connecting portion 231 and the docking portion 232 can be connected and separated by adjusting the external force applied by the driving mechanism to the sheath.

[0100] There are various specific embodiments for the connecting portion 231 and the docking portion 232, for example, reference can be made to the aforementioned fixing portion 141 and fixing mating portion 142. In one embodiment, the connecting portion 231 and the docking portion 232 are magnetically attractable magnetic components and magnetic mating components, respectively. The magnetic mating component can be another magnetic component or a structure made of an iron-cobalt-nickel material.

[0101] Alternatively, the connecting portion 231 and the docking portion 232 may be electrically connected and detachable upon receiving a predetermined electrical signal. For example, one of the connecting portion 231 and the docking portion 232 may be an electromagnet, and the other may be a magnetically coupled structure that cooperates with the electromagnet. When the electromagnet is energized, it may be magnetically attracted to the magnetically coupled structure. Conversely, when the electromagnet is de-energized, it may detach from the magnetically coupled structure.

[0102] It should be noted that if the above-mentioned electromagnet and magnetic matching structure are adopted, it should be installed between every two adjacent outer tubes as much as possible, and should not be installed between the first outer tube 200a and the inner tube 100 as much as possible to avoid the electromagnetic field affecting the normal operation of the imaging device 120.

[0103] When the perspective member 220 includes the main body 221, the extension arm 222 and the insertion protrusion 223 as described above, the perspective member 220 can further have an insertion port 224 at the insertion protrusion 223. The insertion port 224 can form an escape space for the outer layer cannula at the location, such as the docking portion 232.

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

[0105] Furthermore, when the paired connecting portion 231 and docking portion 232 are interchangeable, for example, the connecting portion 231 on the inner cannula 100 can connect to the docking portion 232 on the first outer cannula 200a or the docking portion 232 on the second outer cannula 200b. Then, when the first outer cannula 200a is in the third state, at least the imaging device 120 of the inner cannula 100 can remain within the second outer cannula 200b and still connect to the docking portion 232 on the second outer cannula 200b. In this manner, the second outer cannula 200b can still be equipped with the imaging device 120 in the current state, allowing for imaging diagnosis and treatment.

[0106] The above description is only a preferred embodiment of the present invention and does not limit the patent scope of the present invention. All equivalent structural transformations made by using the contents of the present invention description and drawings under the inventive concept of the present invention, or direct / indirect application 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 operating channel in the front-to-back direction; Among them, in each 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 tube assembly according to claim 1, wherein: 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-to-back direction, and at least a partial 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 staged interventional tube assembly according to claim 2, wherein: The inner tube includes a first tube body and a second tube body arranged side by side, the first tube body having the operation channel extending in the front-to-back direction, and the second tube body having a wiring channel extending in the front-to-back direction, the wiring channel being 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 staged interventional tube assembly according to claim 3, wherein: 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 staged interventional tube 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 cannula further comprises an adjusting tube, which is sleeved on the insertion tube in a movably adjustable manner in the front-back direction, and the hardness of the adjusting tube is greater than the hardness of the insertion tube.

7. The staged interventional tube 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 an 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 staged interventional tube 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. 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 to the imaging device.

9. A bronchial endoscope, characterized in that: It comprises an operating component and the staged interventional tube assembly according to any one of claims 1 to 8.

10. The bronchial endoscope according to claim 9, wherein The bronchoscope further includes a driving mechanism, which is provided 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.

Images