A probe component and endoscope

Abstract

The present invention discloses an insertion component and an endoscope, and relates to the technical field of medical devices. The insertion component includes: an outer catheter and an inner catheter. The outer catheter includes a connecting portion and a toggle portion that are connected to each other, and the inner diameter of the toggle portion is smaller than the inner diameter of the connecting portion. The inner catheter is slidably embedded in the interior of the outer catheter, and can selectively extend out of the toggle portion. The distal diameter of the inner catheter is larger than the inner diameter of the toggle portion, so that the inner diameter and / or outer diameter of the toggle portion can be enlarged when the inner catheter extends out of the toggle portion. Since the toggle portion of the insertion component will abut against the duodenal papilla during use, the inner diameter and / or outer diameter of the toggle portion can drive the duodenal papilla to expand after the inner diameter and / or outer diameter of the toggle portion is enlarged, and the insertion component can be quickly and accurately extended into the common bile duct or the common pancreatic duct. The endoscope using the above-mentioned insertion component can enable the doctor to accurately or quickly extend the endoscope into the common bile duct or the common pancreatic duct.

Description

Technical Field

[0001] The present invention relates to the technical field of medical instruments, and in particular to a probe assembly and an endoscope. Background Art

[0002] An endoscope is a commonly used medical device used to directly access the natural passages of the human body, providing doctors with sufficient diagnostic information to treat disease.

[0003] When the endoscope enters the duodenum to examine or operate on the common bile duct or the common pancreatic duct, the duodenal papilla usually needs to be opened before the relevant instruments can be inserted into the common bile duct or the common pancreatic duct. Currently, during the examination, doctors usually insert instruments into the common bile duct or the common pancreatic duct based on their own clinical experience and operation skills, which makes it difficult for doctors to accurately or quickly open or insert the duodenal papilla, greatly increasing the time doctors spend on examining patients. Summary of the invention

[0004] The invention discloses an insertion component and an endoscope, so as to solve the technical problem that it is difficult for a doctor to accurately or quickly insert the endoscope into the common bile duct or the common pancreatic duct in the endoscope in the related art.

[0005] In order to solve the above problems, the present invention adopts the following technical solutions:

[0006] On the one hand, an embodiment of the present application provides a probe assembly for an endoscope, the probe assembly comprising:

[0007] An outer catheter, the outer catheter comprising a connecting portion and a toggle portion connected to each other, the toggle portion is located at a distal end of the outer catheter, and the inner diameter of the toggle portion is smaller than the inner diameter of the connecting portion; and

[0008] The inner catheter is slidably embedded in the outer catheter and can selectively extend out of the toggle portion. The distal end diameter of the inner catheter is larger than the inner diameter of the toggle portion, so that the inner diameter and / or outer diameter of the toggle portion can be expanded when the inner catheter extends out of the toggle portion.

[0009] In one embodiment, the inner catheter includes an enlarged portion, the enlarged portion is located at the distal end of the inner catheter, and the diameter of at least a portion of the region between the distal end and the proximal end of the enlarged portion in the radial direction of the inner catheter is greater than the inner diameter of the toggle portion.

[0010] In one embodiment, the distal end surface of the enlarged portion is a dome-shaped conical surface.

[0011] In one embodiment, the inner catheter further has a flange structure, which is disposed on the outer surface of the enlarged portion and extends in a radial direction of the enlarged portion, and is located between the distal end of the enlarged portion and the proximal end of the enlarged portion.

[0012] In one embodiment, the toggle portion includes a plurality of toggle sub-portions, and the plurality of toggle sub-portions are arranged around the axial direction.

[0013] In one embodiment, the inner edge and / or outer edge of the distal end of the toggle portion is rounded.

[0014] In one embodiment, the probe assembly further includes a handle portion, wherein the handle portion is connected to the distal end of the outer catheter and to the distal end of the inner catheter, and the handle portion is used to control the extension and retraction of the inner catheter relative to the outer catheter.

[0015] In one embodiment, the handle portion comprises:

[0016] a first sleeve connected to a proximal end of the outer catheter;

[0017] a second sleeve, the second sleeve being slidably disposed in the first sleeve and connected to the proximal end of the inner catheter; and

[0018] a third sleeve, the third sleeve being slidably disposed in the second sleeve;

[0019] A first guide wire hole is provided through the interior of the first sleeve, the second sleeve and the third sleeve.

[0020] In one embodiment, the proximal end diameter of the inner catheter is greater than or equal to the inner diameter of the toggle portion; and / or,

[0021] The wall thickness of the toggle portion is greater than the wall thickness of the connecting portion; and / or,

[0022] The connecting portion comprises a first connecting portion close to the toggle portion and a second connecting portion far from the toggle portion, and the rigidity of the second connecting portion is smaller than the rigidity of the first connecting portion; and / or,

[0023] A second guide wire hole is provided through the interior of the inner catheter.

[0024] On the other hand, an embodiment of the present application further provides an endoscope, comprising an operating portion, an instrument mouth, and any one of the above-mentioned insertion components, wherein the instrument mouth is arranged at the operating portion, and the insertion component is connected to the instrument mouth.

[0025] The technical solution adopted by the present invention can achieve the following beneficial effects:

[0026] The probe assembly provided in the embodiment of the present application sets the distal diameter of the inner catheter to be larger than the diameter of the toggle portion of the outer catheter, so that when the inner catheter extends out of the toggle portion, the inner diameter and / or outer diameter of the toggle portion can be expanded outward by radial extrusion. Since the distal end of the toggle portion of the probe assembly will abut against the duodenal papilla during use, when the inner diameter and / or outer diameter of the toggle portion is expanded, the distal end of the expanded portion will have a tendency to expand outward, so that it can drive the duodenal papilla to expand, thereby reducing the closing force of the duodenal papilla or opening the duodenal papilla, so that the inner catheter can be easily inserted into the papilla or extended into the common bile duct or the common pancreatic duct. The endoscope using the above-mentioned probe assembly can enable doctors to accurately or quickly extend the instrument into the common bile duct or the common pancreatic duct, solving the technical problem in the prior art that it is difficult for doctors to accurately or quickly extend the instrument into the common bile duct or the common pancreatic duct. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. 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 these drawings without paying creative work.

[0028] Figure 1 A schematic structural diagram of an endoscope in one embodiment of the present application is shown;

[0029] Figure 2 yes Figure 1 A cross-sectional view of a part of the structure;

[0030] Figure 3 yes Figure 1 The enlarged view of point A in the middle;

[0031] Figure 4 A cross-sectional view of a probe assembly in a first state in an embodiment of the present application is shown;

[0032] Figure 5 A cross-sectional view of another probe assembly in an embodiment of the present application in a first state is shown;

[0033] Figure 6 A cross-sectional view of a probe assembly in an embodiment of the present application in a second state is shown;

[0034] Figure 7 A cross-sectional view of a probe assembly in an embodiment of the present application in a third state is shown;

[0035] Figure 8 yes Figure 1 The enlarged view of point B in the middle;

[0036] Fig. 9 yes Figure 2 Enlarged view of point C in the middle;

[0037] Fig.10 yes Fig. 9 Enlarged view of point D in the middle.

[0038] In the figure: 1. endoscope; 10. operating part; 20. instrument mouth; 30. insertion assembly; 310. outer catheter; 311. connecting part; 311a. first connecting part; 311b. second connecting part; 312. toggle part; 312a. toggle sub-part; 320. inner catheter; 321. enlarged part; 321a. dome cone surface; 322. supporting part; 323. flange structure; 324. second guide wire guide hole; 330. handle part; 331. first sleeve; 332. second sleeve; 332a. notch; 332b. handheld part; 333. third sleeve; 333a. bump; 333b. first guide wire guide hole; 2. guide wire. DETAILED DESCRIPTION

[0039] To make the purpose, technical solution and advantages of the present invention clearer, the technical solution of the present invention will be described in detail below. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other implementation methods obtained by ordinary technicians in this field without creative work belong to the scope of protection of the present invention.

[0040] The terms "first", "second", etc. in the specification and claims of the present application are used to distinguish similar objects, and are not used to describe a specific order or sequence. It should be understood that the data used in this way can be interchangeable under appropriate circumstances, so that the embodiments of the present application can be implemented in an order other than those illustrated or described here, and the objects distinguished by "first", "second", etc. are generally of one type, and the number of objects is not limited. For example, the first object can be one or more. In addition, "and / or" in the specification and claims represents at least one of the connected objects, and the character " / " generally indicates that the objects associated with each other are in an "or" relationship.

[0041] In each embodiment of the present application, "proximal end" and "distal end" refer to the position of each component relative to the user in the use environment, wherein the end closer to the user is designated as the "proximal end" and the end farther from the user is designated as the "distal end".

[0042] The inventive concept of the present application is described here:

[0043] An endoscope is a commonly used medical device that is an inspection instrument that can directly enter the natural channels of the human body and provide doctors with sufficient diagnostic information to treat diseases.

[0044] When the common bile duct or the common pancreatic duct needs to be examined, the endoscope usually needs to open the duodenal papilla first before the endoscope can be further inserted into the common bile duct or the common pancreatic duct. Currently, doctors usually insert the endoscope into the common bile duct or the common pancreatic duct according to clinical experience during the examination, which makes it difficult for doctors to operate accurately or quickly, thus greatly increasing the time it takes for doctors to examine patients.

[0045] Based on this, the inventor provides an insertion component and an endoscope, which assist in opening the papilla in a manner similar to a manipulator, thereby avoiding or reducing damage to the environment in the duodenum, and at the same time assisting the doctor to quickly and accurately extend the endoscope into the common bile duct or the common pancreatic duct.

[0046] The following is combined with Figures 1 to 9 , the probe assembly and endoscope provided in this application are described in detail through specific embodiments and their application scenarios.

[0047] See also Figure 1 An embodiment of the present application provides an endoscope 1, which can be used to assist doctors in opening the duodenal papilla (hereinafter referred to as the duodenal papilla), and can assist doctors in quickly and accurately inserting the probe component 30 into the papilla, and then extending it into the common bile duct or the common pancreatic duct, or guiding other instruments (such as a guide wire) into the papilla and extending it into the common bile duct or the common pancreatic duct.

[0048] Please also see Figure 1 and Figure 2 In this embodiment, the endoscope 1 may include an operating portion 10, an instrument mouth 20, and an insertion assembly 30. The instrument mouth 20 may be arranged on the operating portion 10, and the insertion assembly 30 may be connected to the instrument mouth 20. Preferably, the instrument mouth 20 may protrude from the surface of the operating portion 10, so that it is convenient for the user to install the insertion assembly 30 on the instrument mouth 20. The embodiment of the present application does not limit the specific setting method of the operating portion 10 and the instrument mouth 20. For example, in one embodiment, the instrument mouth 20 may be detachably connected to the operating portion 10. When the instrument mouth 20 is damaged, only the instrument mouth 20 may be removed and replaced, so that the user's use cost may be reduced. In another embodiment, the instrument mouth 20 may be integrally formed with the operating portion 10, so that the overall structural strength of the operating portion 10 and the instrument mouth 20 may be improved, and the possibility of damage to the instrument mouth 20 may be reduced. The specific setting may be based on actual conditions and is not limited here.

[0049] For further information, please also refer to Figure 3 and Figure 4The probe assembly 30 may include: an outer catheter 310 and an inner catheter 320. The inner catheter 320 may be slidably embedded in the outer catheter 310 and may slide along the axial direction so that the inner catheter 320 may selectively extend the toggle portion 312 from the distal end.

[0050] The outer catheter 310 may include a connecting portion 311 and a toggle portion 312 connected in sequence along the axial direction, and the toggle portion 312 is located at the distal end of the connecting portion 311. In this embodiment, the toggle portion 312 may be used to abut against the nipple and to toggle the nipple to open the nipple.

[0051] The embodiment of the present application does not limit the specific structure of the toggle portion 312. For example, in one embodiment, the toggle portion 312 can be set as a petal-shaped structure. In other embodiments, the toggle portion 312 can also be set as a structure similar to an elastic ring. For the convenience of explanation, the toggle portion 312 is set as a petal-shaped structure as an example. Specifically, the toggle portion 312 can include multiple toggle sub-portions 312a, and the multiple toggle sub-portions 312a are arranged around the axial direction. The embodiment of the present application also does not limit the specific number of the toggle sub-portions 312a. For example, it can be 2, 3 or 4, etc., and can be set according to actual conditions.

[0052] Furthermore, in one embodiment, the toggle portion 312 can be made of an elastic material, such as rubber, resin, etc., that is, when the toggle portion 312 is subjected to force, it can be deformed, and when the external force is removed, the toggle portion 312 can restore the deformation, that is, in the process of the inner catheter 320 extending out of the outer catheter 310, the inner catheter 320 can apply a radially outward force to the toggle portion 312 of the outer catheter 310, so that the toggle portion 312 is radially deformed and the inner diameter and / or outer diameter of the toggle portion 312 is enlarged, and when the inner catheter 320 is retracted into the outer catheter 310, the toggle portion 312 of the outer catheter 310 loses the effect of the external force and can restore to its original state, so that the toggle portion 312 can be repeatedly operated during a detection process to reduce the user's usage cost.

[0053] In addition, in another embodiment, the inner edge and / or outer edge of the distal end of the toggle portion 312 can be rounded, that is, the inner edge and / or outer edge of the toggle portion 312 has a certain curvature, and when the toggle portion 312 abuts against the nipple, the stimulation or damage to the nipple can be reduced. In addition, when the toggle portion 312 is opened, the above structure can also reduce the stimulation or damage to the surface of the nipple. Compared with some existing means of assisting the opening of the nipple, such as spraying water on the nipple, the solution provided in the embodiment of the present application will not cause the problem that the duodenal cells may absorb water and cause electrolyte imbalance in the cells, and the external water in the duodenum may cause intestinal flora imbalance. That is to say, in the embodiment of the present application, the side effects of the method of assisting the opening of the nipple are smaller.

[0054] It should be noted that the inner edge of the proximal end of the toggle portion 312 may also be rounded, so that the inner catheter 320 can be smoother when in contact with the toggle portion 312 , thereby facilitating the inner catheter 320 to extend relative to the outer catheter 310 .

[0055] In addition, in some other embodiments, the wall thickness of the toggle portion 312 can be greater than the wall thickness of the connecting portion 311, that is, in this embodiment, the wall of the toggle portion 312 can be thickened, so that each section of the toggle portion 312 has sufficient structural strength and rigidity to avoid local bending or axial compression, so as to transfer the force powerfully and evenly around the nipple and easily open the nipple.

[0056] In this embodiment, the connection portion 311 may include a first connection portion 311a and a second connection portion 311b connected to each other along the axial direction, wherein the first connection portion 311a is close to the toggle portion 312, and the second connection portion 311b is far away from the toggle portion 312. The stiffness of the second connection portion 311b is less than the stiffness of the second connection portion 311b. It should be noted that the stiffness here refers to the deformation capacity after being subjected to force, and the stronger the deformation capacity after being subjected to force, the smaller the stiffness.

[0057] It is understandable that, since the first connection portion 311a needs to support the toggle portion 312, the first connection portion 311a needs to have a relatively large rigidity, which can prevent the toggle portion 312 from deforming when it contacts the nipple, thereby ensuring that the probe assembly 30 can accurately extend into the nipple. Specifically, if the toggle portion 312 is deformed when it contacts the nipple, it may cause the axis of the distal end of the toggle portion 312 to deviate from the axis of the nipple, which will result in that even if the toggle portion 312 can open the nipple, the inner catheter 320 is not coaxial with the nipple, so that the inner catheter 320 cannot accurately extend into the nipple.

[0058] Since the second connection part 311b mainly plays a connecting role, the second connection part 311b does not need to have too large rigidity, which can help reduce the cost of the entire inner catheter 320. Because the toggle part 312 needs to be guided by the guide mechanism of the duodenoscope after extending from the instrument channel, the rigidity of the second connection part 311b is designed to be smaller than the rigidity of the first connection part 311a, so that when the toggle part 312 abuts against the nipple, the first connection part 311a is not easily deformed, and the second connection part 311b can also have good guidance to guide the toggle part 312. In this way, when the toggle part 312 continues to extend from the instrument channel, by controlling the guide mechanism to guide the second connection part 311b, the first connection part 311a can be accurately pointed to the nipple and moved toward the nipple.

[0059] The inner catheter 320 can be used to extend into the nipple. In some embodiments, a second guide wire hole 324 can be provided throughout the interior of the inner catheter 320. A guide wire 2 or other instrument can be provided in the second guide wire hole 324. When the inner catheter 320 is extended into the nipple, the guide wire 2 or other instrument can extend from the distal end of the second guide wire hole 324 along the second guide wire hole 324 and extend into the common bile duct or the common pancreatic duct, so that the doctor can use the guide wire to introduce the instrument to further examine the patient, or inject contrast agent through the second guide wire hole 324.

[0060] It should be noted that the embodiment of the present application does not limit the specific structure of the outer catheter 310 and the inner catheter 320. The embodiment of the present application is described by taking the structure in which the outer catheter 310 and the inner catheter 320 are both cylindrical as an example, and the specific configuration can be based on actual conditions.

[0061] For further information, please refer to Figure 4 In one embodiment, the inner catheter 320 may include an enlarged portion 321 and a supporting portion 322 connected in sequence along the axial direction. The enlarged portion 321 is located at the distal end of the inner catheter 320. The diameter of at least a portion of the region between the distal end and the proximal end of the enlarged portion 321 in the radial direction of the inner catheter 320 is larger than the inner diameter of the toggle portion 312. When the inner catheter 320 slides in the outer catheter 310, the enlarged portion 321 may expand the inner diameter and / or outer diameter of the toggle portion 312. As mentioned above, since the toggle portion 312 is used to abut against the nipple, when the toggle portion 312 abuts against the nipple, the enlarged portion 321 expands the inner diameter and / or outer diameter of the toggle portion 312, so that the toggle portion 312 drives the nipple to expand, thereby facilitating the inner catheter 320 to extend into the nipple.

[0062] In a specific embodiment, the enlarged portion 321 can be set as a spherical structure, so that the surface of the enlarged portion 321 can be smoother. When the enlarged portion 321 expands the inner diameter and / or outer diameter of the toggle portion 312, at least part of the structure of the enlarged portion 321 can extend into the nipple. The structure of the enlarged portion 321 can make it easier for the enlarged portion 321 to extend into the nipple, and can reduce the stimulation to the nipple. The spherical enlarged portion 321 can evenly act on the outer catheter 310, so that the deformation of the distal end of the outer catheter 310 is more uniform.

[0063] Furthermore, in one embodiment, the distal end surface of the enlarged portion 321 can be set as a dome cone surface 312a. It is understandable that, since the aperture of the nipple is small, although the toggle portion 312 can drive the nipple to expand, its size after expansion is also small, and the dome cone surface 312a can play a guiding role in the process of the enlarged portion 321 extending into the nipple. Specifically, since the size of the dome cone surface 312a is smaller than the body of the enlarged portion 321, and the distal end of the enlarged portion 321 becomes sharp, the dome cone surface 312a can be more easily extended into the nipple, and the dome cone surface 312a can also reduce the stimulation to the nipple.

[0064] Also, see Figure 5 In another embodiment, the inner catheter 320 may also have a flange structure 323, which may be arranged on the outer surface of the enlarged portion 321 and extend in the radial direction of the enlarged portion 321. The flange structure 323 may be located between the distal end of the enlarged portion 321 and the proximal end of the enlarged portion 321, and may preferably be arranged near the proximal end of the enlarged portion 321. The flange structure 323 may be used for positioning and prompting the user of the insertion depth of the enlarged portion 321. Specifically, when the user pushes the inner catheter 320 into the nipple, the flange structure 323 will contact the nipple, and the user can feel the change in resistance at this time, specifically, the user can feel that the resistance will increase significantly at this time, which can play a role in prompting the user. The present application does not limit the specific position of the flange structure 323. For example, the flange structure 323 may be arranged perpendicular to the axis of the inner catheter 30, so that the cross-sectional size of the flange structure 323 and the enlarged portion 321 is the largest, which is conducive to improving the positioning effect. The specific position can be set according to actual conditions and is not limited here.

[0065] Please refer again Figure 4The support portion 322 is located at the proximal side of the inner catheter 320, and the support portion 322 can support the enlarged portion 321. In this embodiment, the diameter of the support portion 322 (as shown in b in the figure) can be set to be greater than or equal to the inner diameter of the toggle portion 312 (as shown in a in the figure). After at least a part of the enlarged portion 321 extends into the nipple, the outer catheter 310 can be moved away from the nipple, so that the enlarged portion 321 can be completely extended out of the outer catheter 310, and the toggle portion 312 can restore its deformation due to the loss of the squeezing of the enlarged portion 321. Since the diameter of the support portion 322 is set to be greater than or equal to the inner diameter of the toggle portion 312, the enlarged portion 321 can be limited to the outside of the outer catheter 310, so that the enlarged portion 321 can be further extended into the nipple. Specifically, at this time, the inner catheter 320 and the outer catheter 310 can move toward the nipple as a whole. Compared with the inner catheter 320 moving toward the nipple alone, the above-mentioned embodiment can make the inner catheter 320 have higher structural strength when moving toward the nipple, thereby facilitating the enlarged portion 321 to further extend into the nipple.

[0066] In summary, the probe assembly 30 provided in the embodiment of the present application can have at least three states. Figure 4 , Figure 6 and Figure 7 In this embodiment, the three states of the probe component 30 can be switched freely. The present application does not limit the switching order and switching form. For example, one of the switching modes will be used as an example for explanation.

[0067] Please refer to Figure 4 When the probe assembly 30 is in the first state, the inner catheter 320 is located inside the outer catheter 310 , and at this time, the enlarged portion 321 will not squeeze the toggle portion 312 .

[0068] Please refer to Figure 6 When the inner catheter 320 is sliding relative to the outer catheter 310 so that the inner catheter 320 is close to the nipple, the insertion component 30 can be switched from the first state to the second state. At this time, the enlarged portion 321 squeezes the toggle portion 312 to expand the inner diameter and / or outer diameter of the toggle portion 312. At this time, the enlarged portion 321 can extend into the nipple.

[0069] Please refer to Figure 7 When the inner catheter 320 slides relative to the outer catheter 310 so that the inner catheter 320 extends into the nipple, the insertion component 30 can be switched from the second state to the third state. At this time, the enlarged part 321 completely extends out of the outer catheter 310 and can enter the nipple, and the toggle part 312 restores its deformation.

[0070] Please also see Figure 1 and Figure 8In some embodiments, the probe assembly 30 may further include a handle portion 330, which may be mounted on the instrument mouth 20 to relatively fix the probe assembly 30 and the operating portion 10. The embodiment of the present application does not limit the connection method between the handle portion 330 and the instrument mouth 20, for example, it may be a snap connection, an interference connection, or a threaded connection, etc., which may be specifically configured according to actual conditions.

[0071] The handle portion 330 can be connected to the proximal end of the outer catheter 310, specifically to the second connecting portion 311b, and the handle portion 330 can be connected to the proximal end of the inner catheter 320, specifically to the support of the inner catheter 320. The handle portion 330 can be used to control the extension and retraction of the outer catheter 310 and the inner catheter 320, so as to facilitate the abutment of the toggle portion 312 against the nipple and to facilitate the extension of the enlarged portion 321 into the nipple.

[0072] For further information, please also refer to Figure 1 , Figure 2 , Figure 8 , Fig. 9 and Fig.10 In this embodiment, the handle portion 330 may include a first sleeve 331, a second sleeve 332 and a third sleeve 333. The embodiment of the present application does not limit the specific structure of the first sleeve 331, the second sleeve 332 and the third sleeve 333. For example, in one embodiment, the first sleeve 331, the second sleeve 332 and the third sleeve 333 can all be set to be sleeves with a circular cross-section. In another embodiment, the first sleeve 331, the second sleeve 332 and the third sleeve 333 can all be set to be sleeves with a square cross-section, etc. The specific settings can be made according to actual conditions.

[0073] The first sleeve 331 may be connected to the proximal end of the outer catheter 310 , specifically to the second connecting portion 311 b of the outer catheter 310 .

[0074] The second sleeve 332 can be slidably disposed in the first sleeve 331, and the second sleeve 332 can be connected to the proximal end of the inner catheter 320, specifically connected to the support portion 322 of the inner catheter 320. The user can control the second sleeve 332 to slide in the first sleeve 331, thereby controlling the inner catheter 320 to slide in the outer catheter 310.

[0075] The third sleeve 333 can be slidably set in the second sleeve 332, and the first sleeve 331, the second sleeve 332 and the third sleeve 333 are penetrated by a first guide wire guide hole 333b, and the first guide wire guide hole 333b can be connected with the second guide wire guide hole 324. After the guide wire 2 or other instruments are set in the first guide wire guide hole 333b and the second guide wire guide hole 324, the user can control the third sleeve 333 to slide in the second sleeve 332, thereby controlling the guide wire 2 or other instruments to slide in the inner catheter 320. Preferably, the first guide wire guide hole 333b in the first sleeve 331, the second sleeve 332 and the third sleeve 333 can be coaxially arranged.

[0076] In addition, in one embodiment, the outer surface of the second sleeve 332 may be provided with a handle portion 332b. The provision of the handle portion 332b may facilitate the user to manipulate the second sleeve 332. The embodiment of the present application does not limit the specific structure of the handle portion 332b. For example, in one embodiment, the handle portion 332b may protrude from the outer surface of the second sleeve 332 in a radial direction. At the same time, the embodiment of the present application does not limit the specific number of the handle portions 332b. For example, it may be 1, 2 or 4, etc., and may be set according to actual conditions.

[0077] Further, in one embodiment, a notch 332a may be provided on the surface of the second sleeve 332, and a protrusion 333a may be provided on the surface of the third sleeve 333. The protrusion 333a may be slidably embedded in the notch 332a, and the user may judge the moving distance of the guide wire 2 or other instruments in the inner catheter 320 by the moving distance of the protrusion 333a in the notch 332a. Specifically, during use, the protrusion 333a may be preset to be at the farthest distance from the bottom of the notch 332a. As the user pushes the third sleeve 333, the protrusion 333a gradually approaches the bottom of the notch 332a, so that the moving distance of the guide wire 2 or other instruments in the inner catheter 320 can be more intuitively reflected, and further, it can assist doctors in detecting and determining the insertion length of the guide wire 2 or other instruments. It is understandable that in some more specific embodiments, the second sleeve 332 and the first sleeve 331 may be provided with scale marks on their surfaces, so that the user can more accurately control the endoscope 1, so that the enlarged portion 321 is extended to a preset position or the guide wire 2 or other instruments are extended to a preset position. Figure 6 In the second state shown in FIG. 1 , the relative position relationship between the protrusion 333a and the notch 332a is as follows: Figure 8 shown.

[0078] In summary, the insertion component 30 provided in the embodiment of the present application sets the distal end diameter of the inner catheter 320 to be larger than the diameter of the toggle portion 312 of the outer catheter 310, so that the inner diameter and / or outer diameter of the toggle portion 312 can be expanded when the inner catheter 320 extends out of the toggle portion 312. Since the toggle portion 312 will abut against the duodenal papilla during use of the insertion component 30, the enlarged inner diameter and / or outer diameter of the toggle portion 312 can drive the duodenal papilla to expand, thereby allowing the insertion component 30 to be quickly and accurately inserted into the common bile duct or the common pancreatic duct. The endoscope 1 using the above-mentioned insertion component 30 can enable the doctor to accurately or quickly insert the endoscope 1 into the common bile duct or the common pancreatic duct, thereby solving the technical problem in the prior art that it is difficult for the doctor to accurately or quickly insert the endoscope 1 into the common bile duct or the common pancreatic duct.

[0079] It should be noted that, in this article, the terms "include", "comprises" or any other variations thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, an element defined by the sentence "comprises a ..." does not exclude the existence of other identical elements in the process, method, article or device including the element.

[0080] In addition, it should be noted that the scope of the methods and devices in the embodiments of the present application is not limited to performing functions in the order shown or discussed, and may also include performing functions in a substantially simultaneous manner or in a reverse order according to the functions involved. For example, the described methods may be performed in an order different from that described, and various steps may be added, omitted, or combined. In addition, features described with reference to certain examples may be combined in other examples.

[0081] The above description is only a specific implementation mode of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can easily think of changes or substitutions within the technical scope disclosed by the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A probe assembly (30) for an endoscope (1), characterized in that: The probe assembly (30) comprises: An outer catheter (310), the outer catheter (310) comprising a connecting portion (311) and a toggle portion (312) connected to each other, the toggle portion (312) being located at the distal end of the outer catheter (310), and the inner diameter of the toggle portion (312) being smaller than the inner diameter of the connecting portion (311); and an inner catheter (320), the inner catheter (320) being slidably embedded in the interior of the outer catheter (310) and being selectively extendable from the toggle portion (312); a distal diameter of the inner catheter (320) being larger than an inner diameter of the toggle portion (312), so that the inner diameter and / or outer diameter of the toggle portion (312) can be enlarged when the inner catheter (320) extends from the toggle portion (312); The inner catheter (320) comprises an enlarged portion (321), the enlarged portion (321) is located at the distal end of the inner catheter (320), and the diameter of at least a portion of the region between the distal end and the proximal end of the enlarged portion (321) in the radial direction of the inner catheter (320) is greater than the inner diameter of the toggle portion (312); The inner catheter (320) also has a flange structure (323), which is arranged on the outer surface of the enlarged portion (321) and extends along the radial direction of the enlarged portion (321). The flange structure (323) is located between the distal end of the enlarged portion (321) and the proximal end of the enlarged portion (321).

2. The probe assembly (30) according to claim 1, characterized in that: The distal end surface of the enlarged portion (321) is a dome-shaped conical surface (321a).

3. The probe assembly (30) according to claim 1, characterized in that: The toggle portion (312) comprises a plurality of toggle sub-portions (312a), and the plurality of toggle sub-portions (312a) are arranged in a surrounding manner around the axial direction.

4. The probe assembly (30) according to claim 3, characterized in that: The inner edge and / or outer edge of the distal end of the toggle portion (312) is rounded.

5. The probe assembly (30) according to any one of claims 1 to 4, characterized in that: The probe assembly (30) further comprises a handle portion (330), wherein the handle portion (330) is connected to the distal end of the outer catheter (310) and to the distal end of the inner catheter (320), and the handle portion (330) is used to control the extension and retraction of the inner catheter (320) relative to the outer catheter (310).

6. The probe assembly (30) according to claim 5, characterized in that The handle portion (330) comprises: A first sleeve (331), the first sleeve (331) being connected to the proximal end of the outer catheter (310); a second sleeve (332), the second sleeve (332) being slidably disposed in the first sleeve (331), and the second sleeve (332) being connected to the proximal end of the inner catheter (320); and a third sleeve (333), the third sleeve (333) being slidably disposed in the second sleeve (332); A first guide wire hole (333b) is provided through the interior of the first sleeve (331), the second sleeve (332) and the third sleeve (333).

7. The probe assembly (30) according to any one of claims 1 to 4, characterized in that: The proximal end diameter of the inner catheter (320) is greater than or equal to the inner diameter of the toggle portion (312); and / or The wall thickness of the toggle portion (312) is greater than the wall thickness of the connecting portion (311); and / or The connecting portion (311) comprises a first connecting portion (311a) close to the toggle portion (312) and a second connecting portion (311b) far from the toggle portion (312), the rigidity of the second connecting portion (311b) being smaller than the rigidity of the first connecting portion (311a); and / or A second guide wire hole (324) is provided through the interior of the inner catheter (320).

8. An endoscope (1), characterized in that: It comprises an operating part (10), an instrument mouth (20), and an insertion assembly (30) according to any one of claims 1 to 7, wherein the instrument mouth (20) is arranged on the operating part (10), and the insertion assembly (30) is connected to the instrument mouth (20).

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