Medical endoscope catheter

Abstract

This utility model belongs to the field of interventional medical devices, specifically relating to a medical endoscope catheter, comprising: a tubular body, wherein an airflow channel extending axially along the inner wall of the tubular body is provided; an end wall, disposed at the first end of the tubular body, wherein a through hole is provided through the end wall, and a plurality of circumferentially spaced ribs are provided on the side of the end wall facing the inner cavity of the tubular body, wherein each rib is distributed in a vortex shape. The airflow is continuously guided by the arched ribs to form a stable vortex ring, reducing energy dissipation caused by turbulence and improving airflow utilization under the same air source pressure; this utility model transforms disordered flow into controlled vortices through geometric constraints on the airflow path, improving cleaning efficiency while reducing the system's working air pressure.

Description

Technical Field

[0001] This utility model belongs to the field of interventional medical devices, specifically relating to a medical endoscope catheter. Background Technology

[0002] During laparoscopic surgery, the endoscope lens often fogs up due to water vapor condensation and splashing of blood and tissue debris, resulting in a blurred or even completely lost surgical field. This forces surgeons to frequently interrupt the operation to clean the lens, disrupting the surgical rhythm, prolonging the operation time, and increasing workload. While existing endoscopic catheter technology achieves cleaning by delivering fluid in front of the lens, it still has significant drawbacks: firstly, the catheter lacks effective airflow constraint, only forming a simple airflow channel, making it difficult to precisely control the airflow angle and coverage area, resulting in poor cleaning effectiveness; secondly, the disordered airflow distribution leads to significant airflow waste, forcing the gas supply system to increase its working pressure to meet the demand, thus increasing energy consumption. Utility Model Content

[0003] In view of the shortcomings of the prior art described above, the purpose of this utility model is to provide a medical endoscope catheter that can improve the cleaning effect and efficiency of endoscopes.

[0004] To achieve the above and other related objectives, this utility model provides a medical endoscope catheter, comprising:

[0005] A tubular body, wherein an airflow channel is provided inside the tube wall of the tubular body extending along the axial direction of the tubular body, the airflow channel is connected to the inner cavity of the tubular body at a first end, and an air inlet for connecting an air source is formed at a second end of the tubular body.

[0006] An end wall is provided at the first end of the tubular body. The end wall has a through hole penetrating through it. On the side of the end wall facing the inner cavity of the tubular body, multiple ribs are provided at circumferential intervals along the tubular body. The vertical projections of the through hole and the ribs onto a reference plane perpendicular to the axis of the tubular body are configured as follows:

[0007] The through hole at least covers the geometric center of the end wall; the inner end of the rib extends to the edge of the through hole, and the outer end of the rib extends to the tube wall of the tubular body; the outer end is offset relative to the inner end in the circumferential direction of the tubular body, and the rib between the outer end and the inner end is arched so that each rib is distributed in a vortex shape.

[0008] In an optional embodiment of the present invention, the vertical projection of each of the ribs on the reference plane is configured such that at least the outer ends of each of the ribs are equidistantly spaced in the circumferential direction of the tubular body.

[0009] In an optional embodiment of this utility model, the vertical projection of the rib on the reference plane is configured such that the width of the rib gradually decreases from the outer end to the inner end.

[0010] In an optional embodiment of the present invention, the vertical projections of the through hole and each of the ribs on the reference plane are configured such that the extension lines of the inner ends of each of the ribs intersect, and the intersecting area is located within the through hole.

[0011] In an optional embodiment of the present invention, the vertical projections of the through hole and each of the ribs on the reference plane are configured such that the intersection area of ​​the inner end extensions of each of the ribs is located at the geometric center of the end wall.

[0012] In an optional embodiment of this utility model, five convex ribs are provided.

[0013] In an optional embodiment of this utility model, the end wall is inclined relative to the axis of the tubular body.

[0014] In an optional embodiment of the present invention, the vertical projection of the through hole on the reference plane is configured such that the through hole is eccentrically positioned relative to the geometric center of the end wall toward a first side of the end wall; the first side of the end wall is the side closest to the second end of the tubular body.

[0015] In an optional embodiment of this utility model, the thickness of the protruding rib extending from the end wall is 0.2mm to 0.25mm.

[0016] In an optional embodiment of this utility model, the tubular body includes an inner tube and an outer tube. The cavity between the inner tube and the outer tube constitutes the airflow channel. A support rib is provided between the inner tube and the outer tube, parallel to the axis of the tubular body. A plurality of support ribs are spaced apart along the circumference of the tubular body to divide the airflow channel into a plurality of sub-channels along the circumference of the tubular body. Each support rib has a notch at one end of the tubular body so that each sub-channel is interconnected at the first end of the tubular body.

[0017] The technical advantages of this invention are as follows: This invention uses an axial airflow channel built into the tubular body to directionally deliver gas to the working end of the endoscope. The circumferentially distributed vortex-shaped ribs on the end wall provide three-dimensional constraint and guidance for the airflow. In this structure, the inner end of the rib connects to the edge of the through hole, and the outer end extends to the arched bend of the tube wall, creating a vortex airflow field along the spiral trajectory of the rib. The vortex airflow generates centripetal force, causing the airflow to flow close to the lens surface. Centrifugal force effectively removes water vapor and contaminants. The circumferentially spaced ribs ensure 360° coverage without dead angles. The airflow is continuously guided by the arched ribs to form a stable vortex ring, reducing energy dissipation caused by turbulence and improving airflow utilization under the same gas source pressure. This invention transforms disordered flow into controlled vortices through geometric constraints on the airflow path, improving cleaning efficiency while reducing the system's working gas pressure. Attached Figure Description

[0018] Figure 1 This is a perspective view of the medical endoscope catheter provided in an embodiment of this utility model;

[0019] Figure 2 This is an end view of the medical endoscope catheter provided in an embodiment of this utility model;

[0020] Figure 3 yes Figure 2 AA section view;

[0021] Figure 4a This is a schematic diagram of the airflow channel distribution on the surface of the endoscope provided in the comparative example;

[0022] Figure 4b This is a schematic diagram of the airflow channel distribution on the surface of an endoscope provided in an embodiment of this utility model;

[0023] Figure 5a This is a cloud map showing the axial distribution of airflow velocity provided by the scale.

[0024] Figure 5b This is an axial distribution cloud map of airflow velocity provided by an embodiment of this utility model;

[0025] Figure 6a This is a cloud map of the shear stress distribution on the endoscope surface provided by the comparison model;

[0026] Figure 6b This is a cloud map showing the shear stress distribution on the surface of an endoscope provided in an embodiment of this utility model;

[0027] Explanation of reference numerals in the attached drawings: 10, tubular body; 101, inner tube; 102, outer tube; 103, supporting rib; 11, airflow channel; 111, notch; 20, end wall; 21, through hole; 22, protruding rib; 221, inner end; 222, outer end; 30, endoscope. Detailed Implementation

[0028] The following specific examples illustrate the implementation of this utility model. Those skilled in the art can easily understand other advantages and effects of this utility model from the content disclosed in this specification. This utility model can also be implemented or applied through other different specific embodiments, and various details in this specification can also be modified or changed based on different viewpoints and applications without departing from the spirit of this utility model. It should be noted that, unless otherwise specified, the following embodiments and features described therein can be combined with each other.

[0029] It should be noted that the illustrations provided in the following embodiments are only schematic representations of the basic concept of the present invention. Therefore, the illustrations only show the components related to the present invention and are not drawn according to the number, shape and size of the components in actual implementation. In actual implementation, the form, quantity and proportion of each component can be arbitrarily changed, and the layout of the components may also be more complex.

[0030] This invention aims to solve the problem of blurred surgical field caused by lens fogging and contamination during laparoscopic surgery. This problem stems from two major technical defects in existing endoscopic catheters: First, the catheter structure lacks an effective constraint and guidance mechanism for airflow, forming only an open airflow channel. This results in uncontrollable airflow diffusion angles and random coverage areas, making it impossible to accurately remove contaminants from specific areas of the lens. Second, the disordered airflow distribution causes ineffective airflow dispersion, forcing the air pump to operate at higher output pressures to maintain a basic cleaning effect. This not only increases system energy consumption but may also cause intra-abdominal pressure fluctuations to exceed safe thresholds. Therefore, this invention constrains the airflow path on the endoscope surface, allowing the airflow to vortex and sweep the endoscope surface. The orderly distribution of airflow reduces ineffective dispersion caused by mutual impact, while also reducing cleaning dead zones and improving cleaning efficiency. Under the same air source conditions, it can provide better cleaning results.

[0031] The technical solution of this utility model will be described in detail below with reference to specific embodiments:

[0032] Please see Figure 1-3As shown, the medical endoscope catheter provided in the embodiment of this utility model includes a tubular body 10 and an end wall 20; the tubular body 10 has an airflow channel 11 extending axially along the tubular body 10 inside its wall, the airflow channel 11 communicating with the inner cavity of the tubular body 10 at a first end, and forming an air inlet for connecting an air source at a second end of the tubular body 10; the end wall 20 is disposed at the first end of the tubular body 10, and has a through hole 21 penetrating the end wall 20; the side of the end wall 20 facing the inner cavity of the tubular body 10 has a plurality of holes extending axially along the tubular body 10. The circumferentially spaced ribs 22 of the body 10, the through holes 21 and the ribs 22 are configured such that the through holes 21 at least cover the geometric center of the end wall 20; the inner end 221 of the ribs 22 extends to the edge of the through holes 21, and the outer end 222 of the ribs 22 extends to the tube wall of the tubular body 10; the outer end 222 is offset relative to the inner end 221 in the circumferential direction of the tubular body 10, and the ribs 22 between the outer end 222 and the inner end 221 are arched so that each of the ribs 22 is distributed in a vortex shape.

[0033] This invention uses the axial airflow channel 11 built into the tubular body 10 to directionally deliver gas to the working end of the endoscope 30. The circumferentially distributed vortex-shaped ribs 22 on the end wall 20 form a three-dimensional constraint and guide effect on the airflow. In this structure, the inner end 221 of the rib 22 connects to the edge of the through hole 21, and the outer end 222 extends to the arched bend design of the tube wall, so that the airflow forms a vortex airflow field along the spiral trajectory of the rib 22. The vortex airflow generates centripetal force, causing the airflow to flow close to the lens surface. Through centrifugal force, water vapor and contaminants are effectively removed. The circumferentially spaced distribution of the ribs 22 ensures 360° coverage without dead angles. The airflow is continuously guided by the arched ribs 22 to form a stable vortex ring, reducing energy dissipation caused by turbulence and improving the airflow utilization rate under the same gas source pressure. This invention transforms disordered flow into controlled vortices through the geometric constraint of the airflow path, improving cleaning efficiency while reducing the system working gas pressure.

[0034] The following description, based on simulation comparison results, further illustrates the effectiveness of this invention:

[0035] Please see Figure 4a , 4b As shown, the airflow path of this invention is compared with that of a conventional airflow path, wherein... Figure 4a This is a typical straight airflow path in the comparative example. Figure 4b This is a vortex-shaped airflow path according to an embodiment of the present invention; under the condition that the air source conditions and other parameters of the duct remain unchanged, the comparative airflow velocity axial distribution cloud diagram is as follows. Figure 5a As shown, the axial distribution cloud diagram of the airflow velocity in this embodiment of the present invention is as follows: Figure 5b As shown, comparison Figure 5a , 5b As can be seen, this invention causes the gas to swirl, thus allowing the high-speed airflow to converge on the surface of the endoscope 30. In contrast, the comparative example shows significant dispersion due to gas collisions, and dead zones are distributed on the surface of the endoscope 30. Furthermore, the shear stress distribution cloud diagram of the endoscope 30 surface in the comparative example is shown below. Figure 6a As shown, the surface shear stress distribution cloud diagram of the endoscope 30 in this embodiment of the present invention is as follows: Figure 6b As shown, the specific shear stress distribution is as follows:

[0036] Table 1. Average shear stress and shear stress distribution on the surface of endoscope 30.

[0037]

[0038] As can be seen from Table 1, the average shear stress on the surface of the endoscope 30 in this embodiment is much greater than that in the comparative example. Furthermore, the area proportion with shear stress greater than 0.1 Pa and the area proportion with shear stress greater than 0.3 Pa in this embodiment are both much greater than those in the comparative example. Therefore, the vortex-shaped airflow path of this invention can significantly improve the cleaning effect on the surface of the endoscope 30.

[0039] Please see Figure 2 As shown, in an optional embodiment of this utility model, the vertical projection of each of the ribs 22 on the reference plane is configured such that at least the outer ends 222 of each rib 22 are equidistantly spaced in the circumferential direction of the tubular body 10. This further embodiment, by equidistantly spaced the outer ends 222 of each rib 22 in the circumferential direction, makes the distribution of the vortex airflow on the lens surface more uniform and stable, avoiding uneven cleaning caused by excessively strong or weak local airflow, thereby further improving the regularity and controllability of airflow utilization while maintaining efficient cleaning performance.

[0040] Please see Figure 2 As shown, in an optional embodiment of this utility model, the vertical projection of the rib 22 on the reference plane is configured such that the width of the rib 22 gradually decreases from the outer end 222 to the inner end 221. This embodiment, by designing the width of the rib 22 to gradually narrow from the outer end 222 to the inner end 221, effectively increases the width of the airflow channel 11 outlet between adjacent ribs 22 while ensuring the airflow guiding function. This allows the vortex airflow to diffuse to the lens surface in a smoother transition, avoiding excessively high local pressure caused by concentrated airflow jets and ensuring uniform coverage of the lens surface by clean airflow.

[0041] Please see Figure 2 As shown, in an optional embodiment of this utility model, the vertical projections of the through hole 21 and each of the ribs 22 on the reference plane are configured such that the extension lines of the inner ends 221 of each of the ribs 22 intersect, and the intersection area is located within the through hole 21. This embodiment, by converging the extension lines of the inner ends 221 of each rib 22 inside the through hole 21, allows the airflow to achieve a natural converging and acceleration effect when entering the through hole 21, and is uniformly diffused to the mirror surface through the vortex guidance of the ribs 22. This design increases the effective outlet cross-sectional area of ​​the airflow channel 11 to reduce flow resistance, and maintains the organization of the airflow through geometric constraints, improving flow efficiency while avoiding the generation of disordered turbulence.

[0042] Please see Figure 2 As shown, further, the vertical projections of the through hole 21 and each of the ribs 22 on the reference plane are configured such that the intersection area of ​​the extension lines of the inner ends 221 of each of the ribs 22 is located at the geometric center of the end wall 20. This standardized design not only simplifies the process difficulty of mold processing and product manufacturing, but also ensures the symmetry and consistency of airflow distribution, reducing production costs while ensuring the performance uniformity of each guide channel.

[0043] Please see Figure 2 As shown, in an optional embodiment of this utility model, there are five ribs 22. This embodiment achieves an optimized balance between airflow control effect and structural complexity by setting the number of ribs 22 to five. Too few ribs 22 will lead to uneven distribution of vortex airflow, making it difficult to form a complete cleaning coverage; while too many ribs 22 will increase airflow resistance and increase processing difficulty. The setting of five ribs 22 can ensure the formation of a stable and continuous vortex flow field, and avoid pressure loss caused by an overly dense structure, thus maintaining the unobstructed flow of the airflow channel 11 while ensuring the cleaning effect.

[0044] Please see Figure 1 , 3 As shown, in an optional embodiment of this utility model, the end wall 20 is inclined relative to the axis of the tubular body 10. This embodiment, by inclining the end wall 20, creates a beveled structure at the front end of the catheter, generating a wedge-shaped force during puncture, effectively reducing tissue penetration resistance. Simultaneously, the inclined end wall 20 maintains the airflow guiding function of the through hole 21 and the rib 22, ensuring that the puncture operation is simplified without affecting the cleaning performance of the vortex airflow, thus achieving a balance between structural design and functional requirements.

[0045] Please see Figure 1-3As shown, in an optional embodiment of this utility model, the vertical projection of the through hole 21 on the reference plane is configured such that the through hole 21 is eccentrically positioned relative to the geometric center of the end wall 20 toward a first side of the end wall 20; the first side of the end wall 20 is the side closest to the second end of the tubular body 10. This embodiment, by eccentrically positioning the through hole 21 toward the air source input side, provides more space for the cable routing of the endoscope 30 without affecting the cleaning effect of the vortex airflow. This allows the conduit structure to better adapt to the existing equipment layout of the endoscope 30, ensuring the functional integrity of the airflow channel 11 while avoiding interference with surrounding instruments.

[0046] In an optional embodiment of this utility model, the thickness of the protruding rib 22 extending from the end wall 20 is 0.2mm to 0.25mm. This embodiment limits the thickness of the protruding rib 22 to a critical dimension range of 0.2mm to 0.25mm, achieving optimized airflow performance through precise structural design. When the thickness of the protruding rib 22 is within this range, it can form an airflow channel 11 of sufficient depth to avoid excessive flow resistance, while also preventing a decrease in flow velocity due to excessive channel depth. This thickness parameter allows the airflow to obtain optimal cleaning power while maintaining the most efficient energy utilization rate.

[0047] Please see Figure 2 , 3 As shown, in an optional embodiment of the present invention, the tubular body 10 includes an inner tube 101 and an outer tube 102. The cavity between the inner tube 101 and the outer tube 102 constitutes the airflow channel 11. A support rib 103 is provided between the inner tube 101 and the outer tube 102, which is parallel to the axis of the tubular body 10. A plurality of support ribs 103 are spaced apart along the circumference of the tubular body 10 to divide the airflow channel 11 into a plurality of sub-channels along the circumference of the tubular body 10. Each support rib 103 has a notch 111 at one end of the tubular body 10 so that each sub-channel is interconnected at the first end of the tubular body 10. This embodiment optimizes airflow distribution while maintaining the structural strength of the airflow channel 11 by setting an axial support rib 103 with a notch 111 between the inner tube 101 and the outer tube 102. The support rib 103 not only enhances the pressure resistance of the duct and prevents the tube body from collapsing, but also regulates the airflow path by forming multiple sub-channels through circumferential separation. The setting of the notch 111 allows the airflow of each sub-channel to be fully mixed at the outlet, which not only avoids the pressure unevenness caused by flow splitting, but also ensures that the final vortex airflow has better circumferential uniformity, thereby achieving a dual improvement in structural reliability and airflow stability.

[0048] In summary, this invention uses the axial airflow channel 11 built into the tubular body 10 to directionally deliver gas to the working end of the endoscope 30. The circumferentially distributed vortex-shaped ribs 22 on the end wall 20 provide three-dimensional constraint and guidance for the airflow. In this structure, the inner end 221 of the ribs 22 connects to the edge of the through hole 21, and the outer end 222 extends off-center to the arched bend of the tube wall, creating a vortex airflow field along the spiral trajectory of the ribs 22. The vortex airflow generates centripetal force, causing the airflow to flow tightly against the lens surface. Centrifugal force effectively removes water vapor and contaminants. The circumferential spacing of the ribs 22... The distribution ensures 360° coverage without blind spots; the airflow is continuously guided by the arched ribs 22 to form a stable vortex ring, reducing energy dissipation caused by turbulence and improving airflow utilization under the same air source pressure; this invention transforms disordered flow into controlled vortices through geometric constraints on the airflow path, improving cleaning efficiency while reducing the system's working air pressure; by setting the outer ends 222 of each rib 22 at equal intervals in the circumferential direction, the distribution of vortex airflow on the lens surface is more uniform and stable, avoiding uneven cleaning caused by excessively strong or weak local airflow, thereby maintaining high-efficiency cleaning performance. At the same time, it further improves the regularity and controllability of airflow utilization; by designing the width of the rib 22 to gradually narrow from the outer end 222 to the inner end 221, while ensuring the airflow guiding function, it effectively increases the width of the airflow channel 11 outlet between adjacent ribs 22, allowing the vortex airflow to diffuse to the lens surface in a smoother transition, avoiding excessively high local pressure caused by concentrated airflow jets, and ensuring uniform coverage of the lens surface by clean airflow; by converging the extension lines of the inner ends 221 of each rib 22 into the through hole 21, the airflow enters the through hole 21 The airflow achieves a natural convergence and acceleration effect, and is evenly diffused to the mirror surface through the vortex guidance of the ribs 22. This design increases the effective outlet cross-sectional area of ​​the airflow channel 11 to reduce flow resistance, and maintains the organization of the airflow through geometric constraints, thereby improving flow efficiency while avoiding the generation of disordered turbulence. By setting the number of ribs 22 to 5, an optimal balance is achieved between airflow control effect and structural complexity. Too few ribs 22 will result in uneven distribution of vortex airflow, making it difficult to form a complete clean coverage; while too many ribs 22 will increase airflow resistance and increase processing difficulty.The arrangement of five ribs 22 ensures a stable and continuous vortex flow field while avoiding pressure loss due to excessive density of the structure, maintaining the unobstructed flow of the airflow channel 11 while ensuring cleaning effectiveness. By tilting the end wall 20, a beveled structure is formed at the front end of the catheter, generating a wedge-shaped force during puncture, effectively reducing tissue penetration resistance. Simultaneously, the tilted end wall 20 maintains the airflow guiding function of the through hole 21 and the ribs 22, ensuring that the cleaning performance of the vortex airflow is not affected while simplifying the puncture operation, achieving a unity of structural design and functional requirements. By offsetting the through hole 21 towards the air source input side, more space is reserved for the cable routing of the endoscope 30 without affecting the cleaning effect of the vortex airflow, allowing the catheter structure to better adapt to the existing endoscope 30 equipment layout, ensuring the functional integrity of the airflow channel 11 while avoiding interference with surrounding instruments. The thickness of the ribs 22 is limited to 0.2mm to 0. The critical dimension range of 0.25mm optimizes airflow performance through precise structural design. When the thickness of the rib 22 is within this range, it can form an airflow channel 11 with sufficient depth to avoid excessive flow resistance, while also preventing the flow velocity from decreasing due to excessive channel depth. This thickness parameter allows the airflow to obtain the best cleaning power while maintaining the most efficient energy utilization. By setting an axial support rib 103 with a notch 111 between the inner tube 101 and the outer tube 102, the airflow distribution is optimized while maintaining the structural strength of the airflow channel 11. The support rib 103 not only enhances the pressure resistance of the duct and prevents the tube body from collapsing, but also regulates the airflow path by forming multiple sub-channels through circumferential separation. The setting of the notch 111 allows the airflow of each sub-channel to mix fully at the outlet, which not only avoids pressure unevenness caused by flow splitting, but also ensures that the final vortex airflow has better circumferential uniformity, thereby achieving a dual improvement in structural reliability and airflow stability.

[0049] The above embodiments are merely illustrative of the principles and effects of this utility model and are not intended to limit the scope of this utility model. Any person skilled in the art can modify or alter the above embodiments without departing from the spirit and scope of this utility model. Therefore, all equivalent modifications or alterations made by those skilled in the art without departing from the spirit and technical concept disclosed in this utility model should still be covered by the claims of this utility model.

[0050] Throughout this description, numerous specific details, such as examples of components and / or methods, are provided to provide a complete understanding of embodiments of the present invention. However, those skilled in the art will recognize that embodiments of the present invention may be practiced without one or more of these specific details or by other devices, systems, components, methods, parts, materials, components, etc. In other instances, well-known structures, materials, or operations have not been specifically shown or described in detail to avoid obscuring aspects of embodiments of the present invention.

[0051] Throughout this specification, references to "an embodiment," "an embodiment," or "a specific embodiment" mean that a particular feature, structure, or characteristic described in connection with an embodiment is included in at least one embodiment of the present invention, but not necessarily in all embodiments. Therefore, the various representations of the phrases "in one embodiment," "in an embodiment," or "in a specific embodiment" in different places throughout the specification do not necessarily refer to the same embodiment. Furthermore, a particular feature, structure, or characteristic of any specific embodiment of the present invention can be combined with one or more other embodiments in any suitable manner. It should be understood that other variations and modifications of the embodiments of the present invention described and illustrated herein may be based on the teachings herein and will be considered part of the spirit and scope of the present invention.

[0052] It should also be understood that one or more of the elements shown in the figures may be implemented in a more separate or more integrated manner, or may even be removed because they are inoperable in certain circumstances or provided because they may be useful for a particular application.

[0053] Furthermore, unless otherwise expressly stated, any arrows in the accompanying drawings should be considered illustrative only and not limiting. Additionally, unless otherwise stated, the term "or" as used herein is generally intended to mean "and / or". Where a term is anticipated to provide a separation or combination capability that is unclear, a combination of components or steps will also be considered as indicated.

[0054] As used herein and throughout the claims below, unless otherwise specified, “a” and “the” include the plural references. Similarly, as used herein and throughout the claims below, unless otherwise specified, “in” means “in” and “on”.

[0055] The above description of the embodiments shown in this utility model (including the content set forth in the abstract of the specification) is not intended to be an exhaustive enumeration or to limit the utility model to the precise forms disclosed herein. Although specific embodiments and examples of the utility model have been described herein for illustrative purposes only, various equivalent modifications are possible within the spirit and scope of the utility model, as will be recognized and understood by those skilled in the art. As indicated, these modifications can be made to the utility model in accordance with the above description of the embodiments described herein, and such modifications will be within the spirit and scope of the utility model.

[0056] This document has generally described the systems and methods in detail to aid in understanding the present invention. Furthermore, various specific details have been set forth to provide a general understanding of embodiments of the present invention. However, those skilled in the art will recognize that embodiments of the present invention can be practiced without one or more specific details, or using other devices, systems, accessories, methods, components, materials, parts, etc. In other instances, well-known structures, materials, and / or operations have not been specifically shown or described in detail to avoid obscuring aspects of embodiments of the present invention.

[0057] Therefore, although the present invention has been described herein with reference to specific embodiments thereof, freedom of modification, various changes and substitutions are also within the scope of the above disclosure, and it should be understood that in some cases, certain features of the present invention may be adopted without departing from the scope and spirit of the invention and without corresponding use of other features. Thus, many modifications can be made to adapt a particular environment or material to the essential scope and spirit of the present invention. The present invention is not intended to be limited to the specific terms used in the following claims and / or the specific embodiments disclosed as the best mode of carrying out the present invention, but the present invention will include any and all embodiments and equivalents falling within the scope of the appended claims. Therefore, the scope of the present invention will be determined only by the appended claims.

Claims

1. A medical endoscopic catheter, characterized in that, include: A tubular body (10) has an airflow channel (11) extending axially along the inner wall of the tubular body (10). The airflow channel (11) communicates with the inner cavity of the tubular body (10) at the first end and forms an air inlet for connecting to an air source at the second end of the tubular body (10). An end wall (20) is provided at the first end of the tubular body (10). The end wall (20) has a through hole (21) penetrating through the end wall (20). On the side of the end wall (20) facing the inner cavity of the tubular body (10), there are a plurality of ribs (22) spaced apart along the circumference of the tubular body (10). The vertical projections of the through hole (21) and the ribs (22) on a reference plane perpendicular to the axis of the tubular body (10) are configured as follows: The through hole (21) at least covers the geometric center of the end wall (20); the inner end (221) of the rib (22) extends to the edge of the through hole (21), and the outer end (222) of the rib (22) extends to the tube wall of the tubular body (10); the outer end (222) is offset relative to the inner end (221) in the circumferential direction of the tubular body (10), and the rib (22) between the outer end (222) and the inner end (221) is arched so that each rib (22) is distributed in a vortex shape.

2. The medical endoscopic catheter according to claim 1, characterized in that, The vertical projection of each of the ribs (22) on the reference plane is configured such that at least the outer ends (222) of each of the ribs (22) are equidistantly spaced in the circumferential direction of the tubular body (10).

3. The medical endoscopic catheter according to claim 1, characterized in that, The vertical projection of the rib (22) on the reference plane is configured such that the width of the rib (22) gradually decreases from the outer end (222) to the inner end (221).

4. The medical endoscopic catheter according to claim 1 or 2, characterized in that, The vertical projections of the through hole (21) and each of the ribs (22) on the reference plane are configured such that the extensions of the inner ends (221) of each of the ribs (22) intersect, and the intersection area is located within the through hole (21).

5. The medical endoscopic catheter according to claim 4, characterized in that, The vertical projections of the through hole (21) and each of the ribs (22) on the reference plane are configured such that the intersection area of ​​the extension lines of the inner ends (221) of each of the ribs (22) is located at the geometric center of the end wall (20).

6. The medical endoscopic catheter according to claim 2, characterized in that, The ribs (22) are provided in five parts.

7. The medical endoscopic catheter according to claim 1, characterized in that, The end wall (20) is inclined relative to the axis of the tubular body (10).

8. The medical endoscopic catheter according to claim 7, characterized in that, The vertical projection of the through hole (21) on the reference plane is configured such that the through hole (21) is eccentrically positioned relative to the geometric center of the end wall (20) toward a first side of the end wall (20); the first side of the end wall (20) is the side closest to the second end of the tubular body (10).

9. The medical endoscopic catheter according to claim 1, characterized in that, The thickness of the protruding rib (22) protruding from the end wall (20) is 0.2mm to 0.25mm.

10. The medical endoscopic catheter according to claim 1, characterized in that, The tubular body (10) includes an inner tube (101) and an outer tube (102). The cavity between the inner tube (101) and the outer tube (102) forms the airflow channel (11). A support rib (103) is provided between the inner tube (101) and the outer tube (102) parallel to the axis of the tubular body (10). A plurality of support ribs (103) are spaced apart along the circumference of the tubular body (10) to divide the airflow channel (11) into a plurality of sub-channels along the circumference of the tubular body (10). Each support rib (103) has a notch (111) at one end of the tubular body (10) so that each sub-channel is interconnected at the first end of the tubular body (10).

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