A negative pressure control structure, sheath handle, and introducer sheath

Abstract

The application discloses a negative pressure control structure, a sheath handle and a guide sheath, relates to the field of medical devices, and is used for the guide sheath. The negative pressure control structure comprises a sheath seat and a knob. The sheath seat is provided with a negative pressure adjusting hole. The knob is movably arranged relative to the sheath seat. The knob comprises an elastic sealing part arranged on the opposite surface of the knob and a first sheath wall. The elastic sealing part is used for being elastically pressed against the first sheath wall when the knob is pressed, so that the knob and the first sheath wall are sealingly matched. Medical staff can press the knob, so that the elastic sealing part of the knob is elastically pressed against the first sheath wall provided with the negative pressure adjusting hole. The elastic sealing part can be closely attached to the first sheath wall, so that the gap between the knob and the sheath seat is eliminated. The sealing matching between the knob and the sheath seat is realized, so that the negative pressure adjusting hole is completely closed, the leakage of the negative pressure effect in the sheath seat from the negative pressure adjusting hole is avoided, and the negative pressure suction force of the guide sheath reaches the expectation.

Description

Technical Field

[0001] This application relates to the field of medical device technology, and in particular to a negative pressure control structure, a sheath handle, and a guide sheath. Background Technology

[0002] As an important medical device in modern surgery, the guide sheath can establish a passage within the body cavity, allowing endoscopes and other instruments to be inserted for diagnostic and therapeutic procedures. Simultaneously, the guide sheath can create negative pressure suction within the body to remove fluids, stones, and other substances. The guide sheath comprises a sheath base and an insertion tube. A knob on the sheath base adjusts the opening of the negative pressure port, thereby altering the negative pressure suction force within the insertion tube.

[0003] In existing technology, when medical staff close the negative pressure port by turning the knob, the insertion tube can aspirate body fluids, stones, etc. at maximum power. However, in actual operation, medical staff have found that even when the negative pressure port is completely closed by turning the knob, the negative pressure suction force of the insertion tube does not meet expectations, and the suction effect on large stones and mucus is not ideal. The guide sheath fails to achieve the expected suction function. Utility Model Content

[0004] The purpose of this application is to provide a negative pressure control structure, a sheath handle, and a guide sheath to solve the aforementioned technical problems existing in the prior art.

[0005] In a first aspect, this application provides a negative pressure control structure for guiding a sheath. The negative pressure control structure includes a sheath seat and a knob. The sheath seat has a negative pressure adjustment hole. The knob is movably disposed relative to the sheath seat. The negative pressure adjustment hole is located on the movement path of the knob to adjust the opening degree of the negative pressure adjustment hole, so that the knob can switch between an open position and a closed position. The knob includes an elastic sealing part disposed on its opposite surface to the first sheath wall. The elastic sealing part is used to elastically press against the first sheath wall when the knob is pressed, so that the knob and the first sheath wall are sealed together. The first sheath wall is the sheath wall area on the sheath seat corresponding to the negative pressure adjustment hole.

[0006] Secondly, this application provides a sheath handle, which includes the negative pressure control structure as described in the first aspect.

[0007] Thirdly, this application provides a guide sheath, which includes a sheath handle and an insertion tube as described in the second aspect, with the proximal ends of the sheath handle and the insertion tube connected.

[0008] The technical solution adopted in this application achieves the following beneficial effects: Medical staff can operate a dial to open or close the negative pressure adjustment hole, and the opening degree of the negative pressure adjustment hole can meet the current usage requirements. During use, medical staff need to completely close the negative pressure adjustment hole by using the dial to allow the guide sheath to aspirate stones, body fluids, or excised lesions with maximum suction force. At this time, medical staff can press the dial, causing the elastic sealing part of the dial to elastically press against the first sheath wall with the negative pressure adjustment hole. The elastic sealing part can fit tightly against the first sheath wall, eliminating the gap between the dial and the sheath seat. This ensures a sealed fit between the dial and the sheath seat, so that the negative pressure adjustment hole is completely closed, preventing the negative pressure in the sheath seat from leaking out through the negative pressure adjustment hole, ensuring that the negative pressure suction force of the guide sheath reaches the expected level, and achieving an ideal suction effect for large stones and mucus.

[0009] Compared to related technologies, in this application, during the operation of the dial, there is no direct contact between the dial and the sheath seat. Consequently, the sheath seat does not provide significant resistance to the dial during operation, resulting in smoother dial movement. Furthermore, after the dial is moved to the designated position, the medical staff presses the dial to create a sealed connection between the dial and the sheath seat. This optimizes both the negative pressure suction effect of the guide sheath and the sliding effect of the dial, thus improving the user experience. Attached Figure Description

[0010] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0011] Figure 1 This is a schematic diagram of the negative pressure control structure shown in an exemplary embodiment of this application; Figure 2 This is a schematic diagram of the structure of a toggle switch shown in an exemplary embodiment of this application; Figure 3 This is a cross-sectional view of a negative pressure control structure shown in an exemplary embodiment of this application; Figure 4 This is a schematic diagram of the toggle switch from another perspective, illustrating an exemplary embodiment of this application; Figure 5 This is a schematic diagram of the structure of a toggle switch from another perspective, illustrating an exemplary embodiment of this application. Figure 6 This is a schematic diagram of the sheath seat structure shown in an exemplary embodiment of this application; Figure 7This is a schematic diagram of the structure of a guide sheath shown in an exemplary embodiment of this application.

[0012] In the diagram: 1. Guiding sheath; 100. Sheath handle; 110. Negative pressure control structure; 111. Sheath seat; 1111. Negative pressure adjustment hole; 112. Toggle button; 1121. Elastic sealing part; 1122. Actuating part; 1123. Sliding part; 1124. Slide groove; 1125. Anti-slip texture; 113. Base; 114. Negative pressure pipe; 115. First sheath wall; 200. Insertion tube. Detailed Implementation

[0013] To make the objectives, technical solutions, and advantages of this application clearer, the technical solutions of this application will be described in detail below. Obviously, the described embodiments are only a part of the embodiments of this application, and not all of them. Based on the embodiments in this application, all other implementation methods obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0014] The terms "first," "second," etc., used in the specification and claims of this application are used to distinguish similar objects and not to describe a specific order or sequence. It should be understood that such use of data can be interchanged where appropriate so that embodiments of this application can be implemented in orders other than those illustrated or described herein, and the objects distinguished by "first," "second," etc., are generally of the same class and the number of objects is not limited; for example, a first object can be one or more. Furthermore, in the specification and claims, "and / or" indicates at least one of the connected objects, and the character " / " generally indicates that the preceding and following objects are in an "or" relationship.

[0015] In the various embodiments of this application, "near end" and "far end" refer to the distance of each component from the user in the usage environment. The end closer to the user is designated as the "near end", and the end farther from the user is designated as the "far end".

[0016] In the prior art, during the implementation of this application, the applicant discovered that even when the negative pressure port was completely closed using the knob, the negative pressure suction force of the insertion tube did not meet expectations. This is because some outside air enters the sheath seat through the gap between the knob and the sheath seat, and this portion of the negative pressure suction force is not utilized. This results in the guide sheath's poor suction effect on large stones and mucus, and the guide sheath fails to achieve the expected suction function. Furthermore, this gap may be caused by assembly errors between the knob and the sheath seat, or it may be caused by wear on the knob surface after the knob and sheath seat surfaces rub against each other.

[0017] This application provides a negative pressure control structure 110, please refer to... Figure 1The negative pressure control structure 110 is used for the guide sheath 1. The guide sheath 1 can be inserted into the human body and can form a cavity inside the human body to form an insertion channel for the endoscope.

[0018] Please continue reading. Figure 1 The negative pressure control structure 110 may include a sheath seat 111 and a knob 112, with the knob 112 movably mounted on the sheath seat 111. For example, the surface of the sheath seat 111 has a groove, and the knob 112 is movably mounted within the groove, allowing the knob 112 to be movably positioned relative to the sheath seat 111. Alternatively, in other cases, the sheath seat 111 may have a pivot, and the knob 112 may be rotatably connected to the pivot, allowing the knob 112 to rotate relative to the sheath seat 111. The knob 112 may be made of plastic, silicone, or metal, and its surface may be designed with anti-slip textures (such as vertical lines or grid patterns) or raised grooves to improve grip and prevent slippage during operation. The sheath seat 111 may be a hollow structure, and it may be connected to the insertion tube 200 of the guide sheath 1, allowing the insertion part of the endoscope to extend through the sheath seat 111 into the insertion tube 200, and ultimately into the human body cavity.

[0019] Please continue reading. Figure 1 The sheath 111 has a negative pressure adjustment hole 1111, the shape of which can be a strip or a circle, etc., without limitation. The negative pressure adjustment hole 1111 is located on the moving path of the dial 112 to adjust the opening degree of the negative pressure adjustment hole 1111, so that the dial 112 switches between an open position and a closed position. The open position and the closed position can be two positions on the moving path of the dial 112. When the dial 112 moves along the moving path, the dial 112 can close or open the negative pressure adjustment hole 1111, so that the negative pressure adjustment hole 1111 is in a closed state or an open state. When the negative pressure adjustment hole 1111 is in the closed state, the opening degree can be 0, at which time the inside of the sheath 111 is relatively closed, and the internal negative pressure value reaches the maximum value. When the negative pressure regulating orifice 1111, which is in the open state, is opened, outside air is drawn into the sheath seat 111. At this time, the negative pressure value inside the sheath seat 111 decreases, thereby changing the negative pressure value transmitted from the sheath seat 111 to the insertion tube 200. By switching this opening degree, the gas flow rate between the inside and outside of the sheath seat 111 can be changed, thereby adjusting the magnitude of the negative pressure inside the sheath seat 111 and the insertion tube 200. Furthermore, when the negative pressure regulating orifice 1111 is opened more, the negative pressure inside the sheath seat 111 and the insertion tube 200 decreases. When the opening degree is smaller, the negative pressure inside the sheath seat 111 and the insertion tube 200 increases.

[0020] It should be noted that the sheath 111 can be connected to a negative pressure source, such as a negative pressure suction pump, to generate negative pressure suction inside the sheath 111. The negative pressure suction is transmitted to the distal end of the insertion tube 200 to suction stones, phlegm, etc. from inside the human body, which will not be elaborated further.

[0021] Please see Figure 2 The toggle switch 112 may include an elastic sealing portion 1121, which may be an annular structure or a sheet-like structure, etc., and is not limited thereto. The elastic sealing portion 1121 is disposed on its opposite surface to the first sheath wall 115; in other words, the elastic sealing portion 1121 may be disposed opposite to the first sheath wall 115. It should be noted that the first sheath wall 115 is the sheath wall area on the sheath seat 111 corresponding to the negative pressure adjustment hole 1111, that is, at least a part of the structure of the sheath seat 111 surrounds the negative pressure adjustment hole 1111, and at least a part of the structure may be the first sheath wall 115. The elastic sealing portion 1121 is used to elastically press against the first sheath wall 115 when the toggle switch 112 is pressed, so that the toggle switch 112 and the first sheath wall 115 are sealed together. Medical staff can press the dial 112, causing the elastic sealing part 1121 of the dial 112 to elastically press against the first sheath wall 115 with the negative pressure adjustment hole 1111. The elastic sealing part 1121 can fit tightly with the first sheath wall 115, eliminating the gap between the dial 112 and the sheath seat 111. This makes the dial 112 and the sheath seat 111 sealed together, so that the negative pressure adjustment hole 1111 is completely closed, preventing the negative pressure in the sheath seat 111 from leaking out through the negative pressure adjustment hole 1111. This ensures that the negative pressure suction force of the guide sheath 1 reaches the expected level, and the suction effect of the guide sheath 1 on large stones and mucus reaches the ideal state.

[0022] Furthermore, during the actuation of the dial 112, there is no direct contact between the dial 112 and the sheath seat 111. Consequently, the sheath seat 111 does not provide significant resistance to the dial 112 during actuation, allowing for smoother actuation of the dial 112. In this application, after the dial 112 is moved to the designated position, a medical professional presses the dial 112 to create a sealed fit between the dial 112 and the sheath seat 111. This optimizes both the negative pressure suction effect of the guide sheath 1 and the sliding effect of the dial 112, thus improving the user experience.

[0023] In the embodiments of this application, please refer to Figure 3A movable gap exists between the toggle switch 112 and the first sheath wall 115, allowing for relative sliding between them. This gap provides the necessary space for relative sliding, preventing frictional resistance caused by the toggle switch 112 pressing against the first sheath wall 115 during sliding. This effectively reduces friction, making the toggle switch 112 smoother on the first sheath wall 115 and reducing the probability of jamming. The elastic sealing part 1121 seals the movable gap when pressed against the first sheath wall 115. When the toggle switch 112 is pressed, it elastically presses against the first sheath wall 115, filling the movable gap between the toggle switch 112 and the first sheath wall 115 to form a seal. This seals the movable gap, preventing leakage and ensuring that the negative pressure suction force of the guide sheath 1 reaches the expected level, achieving ideal suction for large stones and mucus.

[0024] In some other cases, the knob 112 and the first sheath wall 115 are in contact with each other, but there is no mutual compression between the knob 112 and the first sheath wall 115. This also allows the knob 112 to directly and closely contact the first sheath wall 115 during the sliding process, thereby generating frictional resistance. This is not a limitation.

[0025] Please refer again to the embodiments in this application. Figure 2 The toggle switch 112 can be made of rubber. Made of elastic rubber, the switch 112 can quickly deform and abut against the first sheath wall 115 when pressed by medical personnel. The integrated design of the toggle switch 112 improves structural stability. After being pressed or moved by external force, the rubber component can recover its initial shape through its own elasticity, ensuring both adaptability to deformation during operation and maintaining structural stability.

[0026] Please see Figure 4 The toggle switch 112 has a toggle portion 1122. The toggle portion 1122 is suitable for toggle operation and can be a sheet-like structure. The toggle portion 1122 is located on the side of the elastic sealing portion 1121 away from the sheath wall, and is a rigid structure. The toggle portion 1122 can be made of polycarbonate, polypropylene, or the like. The toggle portion 1122 of the toggle switch 112 can directly withstand the pressing pressure applied by the fingers of medical personnel. Because the toggle portion 1122 is a rigid structure, when the toggle switch 112 is pressed against the toggle portion 1122, the toggle portion 1122 can evenly transmit the pressure it receives to all parts of the elastic sealing portion 1121, ensuring that the elastic sealing portion 1121 is uniformly stressed and tightly fitted to the corresponding structure, thereby achieving a complete seal. Furthermore, during the toggle operation, the toggle portion 1122 can also transmit the driving force to all parts of the toggle switch 112 to ensure that it can be smoothly toggle.

[0027] Please see Figure 4 as well as Figure 5 The surface of the actuating part 1122 away from the elastic sealing part 1121 is provided with anti-slip texture 1125. For example, the anti-slip texture 1125 can be a raised or recessed structure on the surface of the actuating part 1122, and its shape can be arc-shaped or straight, etc., without limitation. The anti-slip texture 1125 increases the friction between the user's fingers and the surface of the actuating part 1122. When the actuating button 112 is actuated, the anti-slip texture 1125 reduces the relative slippage between the finger and the actuating part 1122, ensuring that the applied driving force can effectively act on the actuating button 112, allowing the actuating button 112 to move accurately to the designated position, avoiding deviations in the sliding of the actuating button 112 due to slippage, and improving the operability of the actuating button 112.

[0028] Please see Figure 4 The toggle switch 112 may further include a sliding portion 1123, which is connected to the actuating portion 1122. The sliding portion 1123 is movably mounted within the negative pressure adjustment hole 1111. One of the sliding portion 1123 and the first sheath wall 115 is provided with a groove 1124, and the other is movably embedded in the groove 1124. For example, the outer periphery of the sliding portion 1123 is provided with the groove 1124, and the first sheath wall 115 can be embedded in the groove 1124, while the sliding portion 1123 extends into the negative pressure adjustment hole 1111. Along the extending direction of the negative pressure adjustment hole 1111, the sliding portion 1123 can slide relative to the first sheath wall 115. This allows the sliding portion 1123 to slide stably relative to the first sheath wall 115 along a preset path, ensuring that the toggle switch 112 and the sheath seat 111 maintain a precise fit during relative movement, achieving smooth sliding cooperation.

[0029] Of course, in some other cases, the first sheath wall 115 is provided with a groove 1124, and the outer periphery of the sliding part 1123 is provided with a protrusion. While the sliding part 1123 extends into the negative pressure regulating hole 1111, the protrusion can be embedded in the groove 1124. This allows the sliding part 1123 to slide stably relative to the first sheath wall 115 along a preset path, which is not limited in this embodiment.

[0030] Preferably, the sliding part 1123 can be a rigid structure. The sliding part 1123 can be made of polycarbonate, polypropylene, or the like, which reduces its deformability, decreases the contact area between the sliding part 1123 and the sheath seat 111, and reduces the frictional resistance generated by deformation when the sliding part 1123 and the sheath seat 111 come into contact. Furthermore, the surface of the sliding part 1123 is easier to maintain a stable smoothness, thereby reducing the friction between the sliding part 1123 and the corresponding sheath wall, making the relative sliding between the two more effortless and smoother.

[0031] Please see Figure 6 The sheath 111 includes a base 113 and a negative pressure conduit 114 that are interconnected. The base 113 is adapted to connect to the insertion tube 200 of the guide sheath 1. A negative pressure adjustment hole 1111 is formed on the base 113 or the negative pressure conduit 114. The base 113 is suitable for medical personnel to hold, and the negative pressure conduit 114 is adapted to connect to an external negative pressure source. For example, the negative pressure adjustment hole 1111 is formed on the negative pressure conduit 114, and a knob 112 is provided on the negative pressure conduit 114. The knob 112 located on the negative pressure conduit 114 changes the opening degree of the negative pressure adjustment hole 1111. The negative pressure suction force has changed before it acts on the base 113, avoiding excessive changes in the negative pressure suction force inside the base 113 due to changes in the opening degree of the negative pressure adjustment hole 1111. This smoothly regulates the negative pressure suction force inside the sheath 111.

[0032] In some other cases, the negative pressure regulating hole 1111 is located in the base 113. When the negative pressure regulating hole 1111 is located in the base 113, since the base 113 is directly connected to the insertion tube 200 of the guide sheath 1, the change in the opening of the regulating hole can more directly affect the negative pressure in the area where the insertion tube 200 and the base 113 are connected, and quickly respond to the negative pressure requirement at the end of the insertion tube 200. This will not be elaborated further here.

[0033] Please see Figure 4 The elastic sealing portion 1121 extends along the outer edge of the toggle switch 112. For example, the elastic sealing portion 1121 can be an annular structure. The annular elastic sealing portion 1121 can completely fit the gap between the outer edge of the toggle switch 112 and the corresponding mating structure (such as the sheath wall). When the toggle switch 112 is moved or pressed, the annular sealing portion can seal the gap from the entire circumference of the toggle switch 112, avoiding partial leakage and ensuring the integrity and reliability of the seal. At the same time, this can also reduce the contact area between the elastic sealing portion 1121 and the sheath seat 111, reducing the resistance experienced by the toggle switch 112 during operation.

[0034] To achieve the above and other related objectives, this application provides a sheath handle 100, please refer to [link / reference]. Figure 7 The sheath handle 100 includes the negative pressure control structure 110 as described above. This gives the sheath handle 100 the beneficial effects of any of the aforementioned solutions, which will not be elaborated further here.

[0035] To achieve the above and other related objectives, this application provides a guide sheath 1, please refer to... Figure 7The guide sheath 1 includes a sheath handle 100 and an insertion tube 200 as described above, with the proximal ends of the sheath handle 100 and the insertion tube 200 connected. For example, the proximal end of the insertion tube 200 is connected to the sheath handle 100, and the insertion tube 200 can be inserted into the human body. This gives the sheath handle 100 the beneficial effects of any of the aforementioned solutions, which will not be elaborated further here.

[0036] It should be noted that, in this document, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Unless otherwise specified, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes that element.

[0037] Furthermore, it should be noted that the scope of the methods and apparatus in the embodiments of this application is not limited to performing functions in the order shown or discussed, but may also include performing functions substantially simultaneously or in the reverse order, depending on the functions involved. For example, the described methods may be performed in a different order than 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.

[0038] The above description is merely a specific embodiment of this application, but the scope of protection of this application is not limited thereto. Any changes or substitutions that can be easily conceived by those skilled in the art within the scope of the technology disclosed in this application should be included within the scope of protection of this application.

Claims

1. A negative pressure control structure, said negative pressure control structure being used for guiding a sheath, characterized in that, The negative pressure control structure includes a sheath and a lever, wherein: The sheath seat has a negative pressure adjustment hole, and the knob is movably disposed relative to the sheath seat. The negative pressure adjustment hole is located on the movement path of the knob to adjust the opening of the negative pressure adjustment hole, so that the knob can switch between the open position and the closed position. The knob includes an elastic sealing portion disposed on its opposite surface to the first sheath wall. The elastic sealing portion is used to elastically press against the first sheath wall when the knob is pressed, so that the knob and the first sheath wall are sealed together. The first sheath wall is the sheath wall region on the sheath seat corresponding to the negative pressure adjustment hole.

2. The negative pressure control structure according to claim 1, characterized in that, There is a movable gap between the knob and the first sheath wall, which is used to allow relative sliding between the knob and the first sheath wall. The elastic sealing part closes the movable gap when it is pressed against the first sheath wall. And / or, the toggle switch is made of rubber.

3. The negative pressure control structure according to claim 1, characterized in that, The toggle switch has a toggle part suitable for toggle operation, the toggle part being located on the side of the elastic sealing part away from the sheath wall, and the toggle part being a rigid structure.

4. The negative pressure control structure according to claim 3, characterized in that, The surface of the actuating part away from the elastic sealing part is provided with anti-slip texture.

5. The negative pressure control structure according to claim 3, characterized in that, The knob also includes a sliding part, which is connected to the toggle part and is movably installed in the negative pressure adjustment hole. One of the sliding part and the first sheath wall is provided with a groove, and the other is movably embedded in the groove.

6. The negative pressure control structure according to claim 5, characterized in that, The sliding part is a rigid structure.

7. The negative pressure control structure according to claim 1, characterized in that, The sheath base includes a base and a negative pressure pipe that are interconnected. The base is adapted to connect to the insertion tube of the guide sheath. The negative pressure adjustment hole is opened on the base or the negative pressure pipe.

8. The negative pressure control structure according to claim 1, characterized in that, The resilient sealing portion extends along the outer edge of the toggle switch.

9. A sheath handle, characterized in that, The sheath handle includes the negative pressure control structure as described in any one of claims 1-8.

10. A guiding sheath, characterized in that, The guide sheath includes a sheath handle and an insertion tube as described in claim 9, wherein the sheath handle and the proximal end of the insertion tube are connected.

Images