Single-hole multi-channel sheathing canal system

Abstract

The single-hole multi-channel sheathing canal system comprises an incision sleeve and a first flexible sealing cover, the incision sleeve is communicated with the first flexible sealing cover in a sealed mode, and meanwhile a plurality of connecting holes are formed in the other end of the first flexible sealing cover; each connecting hole is provided with a flexible pipe sealing assembly, and each flexible pipe sealing assembly is connected with the first flexible sealing cover through a rigid sealing assembly. According to the sheath tube system, the connecting areas of the flexible sealing tube assemblies and the first flexible sealing cover have high rigidity through the rigid sealing assemblies, so that the overall flexibility of the sheath tube system is guaranteed, and meanwhile the non-deformable local rigidity is guaranteed in part of areas; therefore, the air tightness of the sheathing canal system is ensured, operation at any limit angle in the hemispherical space is realized, the flexibility of instrument operation is improved, and meanwhile, the realization of the limit operation angle can also ensure that all instruments do not interfere with one another when a plurality of instruments are operated.

Description

Technical Field

[0001] This application relates to the field of minimally invasive surgical equipment technology, specifically to a single-port multi-channel sheath system. Background Technology

[0002] Laparoscopic single-port surgery involves inserting and removing a laparoscope and multiple instruments through a single incision in the patient's body wall to complete the surgical procedure. Typically, a single-port multi-channel sheath system is inserted into this single incision as the channel for instruments to enter and exit the body. The Triport system is one of the most widely used single-port multi-channel sheath systems in clinical practice. However, this system is limited by conventional cannulation techniques, resulting in poor operability at arbitrary extreme angles within the hemispherical space during actual use. This makes interference highly likely when operating multiple surgical instruments. Utility Model Content

[0003] The main objective of this application is to provide a single-hole multi-channel sheath system, which aims to solve the defect of existing surgical instruments that are prone to mutual interference.

[0004] This application achieves the above objectives through the following technical solutions:

[0005] A single-hole multi-channel sheath system, including a slit sleeve;

[0006] A first flexible sealing cover, along the axis of the first flexible sealing cover, one end of the first flexible sealing cover is in sealed communication with the incision sleeve; the other end of the first flexible sealing cover is provided with a plurality of connection holes; each of the connection holes is provided with a flexible tube sealing assembly for inserting surgical instruments.

[0007] A plurality of rigid sealing components, each of which respectively connects the flexible tube sealing component to the first flexible sealing cover in a sealed manner.

[0008] Optionally, the slit sleeve includes a flexible sleeve with a connecting ring at one end along its axial direction; the first flexible sealing cover has an inner ring cavity, and the connecting ring is inserted into the inner ring cavity.

[0009] Optionally, the flexible tube sealing assembly includes a flexible sealing tube and a flexible one-way valve, wherein the flexible sealing tube is tightly fitted to its outer end face along the axial direction of the connecting hole, and the flexible one-way valve is tightly fitted to its inner end face along the axial direction of the connecting hole.

[0010] Optionally, the rigid sealing assembly includes a first rigid sealing ring and a second rigid sealing ring. The first rigid sealing ring is tightly fitted to the flexible sealing tube along its axial direction, and the second rigid sealing ring is tightly fitted to the flexible one-way valve along its axial direction. The first rigid sealing ring is provided with a plurality of connecting rods, and the second rigid sealing ring is provided with a plurality of insertion holes. Each connecting rod is inserted into and connected to the corresponding insertion hole.

[0011] Optionally, the flexible sealing tube includes a tube body and a first flange. Along the axial direction of the tube body, one end of the tube body is provided with an operating hole, and the other end is connected to the first flange through a corrugated plate.

[0012] Optionally, the inner diameter D1 of the operating hole, the inner diameter D2 of the tube body, and the inner diameter D3 of the first rigid sealing ring satisfy D3>D2≥3D1.

[0013] Optionally, along the axial direction of the tube body, one end of the tube body is integrally connected to a proximal membrane, and the proximal membrane is provided with an operating hole and a plurality of independent sealing lips, and each sealing lip is evenly arranged around the axis of the operating hole.

[0014] Optionally, the flexible sealing tube includes a tube body, with an operating hole at one end of the tube body along its axial direction, and the other end of the tube body being integrally connected to the first flexible sealing cover.

[0015] Optionally, the flexible check valve includes a valve body, with a second flange provided at one end of the valve body along its axial direction, and a plurality of flexible valve plates provided at the other end; each valve plate is arranged around the axis of the valve body, with one end of each valve plate integrally connected to the valve body, and the other ends overlapping each other to close the valve body.

[0016] Optionally, the flexible one-way valve includes a valve body. Along the axial direction of the valve body, one end of the valve body is integrally connected to the first flexible sealing cover, and the other end is provided with a plurality of flexible valve plates. Each valve plate is arranged around the axis of the valve body, and one end of each valve plate is integrally connected to the valve body, while the other ends overlap each other to seal the valve body.

[0017] Compared with the prior art, this application has the following beneficial effects:

[0018] This application includes a cut sleeve and a first flexible sealing cover. The cut sleeve is in sealed communication with the first flexible sealing cover, and a plurality of connection holes are provided at the other end of the first flexible sealing cover. Each of the connection holes is provided with a flexible tube sealing assembly, and each of the flexible tube sealing assemblies is connected to the first flexible sealing cover through a rigid sealing assembly.

[0019] In the technical solution described in this application, each flexible tube sealing assembly is connected to the first flexible sealing cover through a rigid sealing assembly. The connection area between each flexible sealing tube assembly and the first flexible sealing cover has strong rigidity and will not deform during operation. The first flexible sealing cover has a certain elastic deformation capability. In addition, the flexible sealing tube assembly, except for the area connected to the first flexible sealing cover, still has a certain elastic deformation capability in other areas. During operation, both the first flexible sealing cover and the flexible tube sealing assembly can undergo adaptive elastic deformation with the movement of the operating rod. Therefore, the sheath system described in this application ensures both overall flexibility and non-deformable local rigidity in some areas.

[0020] In use, surgical instruments are inserted from each flexible tube sealing assembly. The overall flexibility and local rigidity of the sheath system described in this application can ensure that the first flexible sealing cover undergoes adaptive elastic deformation under the pressure of external instruments without leakage, thereby enabling operation at any extreme angle within the hemispherical space, improving the flexibility of instrument operation. At the same time, the realization of the above-mentioned extreme operating angle can also ensure that there is no interference between instruments when performing multiple instrument operations.

[0021] Secondly, during actual operation, each flexible tube sealing component deforms first under the action of the surgical instrument. When the movement of the surgical instrument reaches a certain range, the first flexible sealing cover undergoes elastic deformation. That is, a two-stage deformation is formed through the flexible tube sealing component and the first flexible sealing cover. The flexible tube sealing component enables fine operation within a small angle range, while the first flexible sealing cover enables large-angle adjustment operation within a hemispherical range. While improving the operability of the surgical instrument, the more precise adjustment capability helps to avoid interference between different instruments, thereby improving the accuracy and safety of the surgical operation.

[0022] Finally, the rigid sealing component ensures the connection stability between the flexible tube sealing component and the first flexible sealing cover, preventing the connection area between the flexible tube sealing component and the first flexible sealing cover from detaching due to the movement of surgical instruments, and ensuring the overall airtightness of the multi-channel sheath system.

[0023] Meanwhile, the rigid sealing component also has a certain blocking effect, that is, it limits the elastic deformation of the instrument to a part of the instrument or structural component, and avoids excessive elastic deformation from causing deformation of other flexible tube sealing components that are not inserted with surgical instruments, thereby effectively improving the airtightness of the entire sheath system. Attached Figure Description

[0024] Figure 1 A schematic diagram of a single-hole multi-channel sheath system provided in Embodiment 1 of this application;

[0025] Figure 2 A cross-sectional view of a single-hole multi-channel sheath system provided in Embodiment 1 of this application;

[0026] Figure 3 This is a cross-sectional view of the first flexible sealing cover;

[0027] Figure 4 An exploded view of the assembly of the flexible tube sealing component and the rigid sealing component;

[0028] Figure 5 A schematic diagram of another possible type of flexible sealing tube;

[0029] Figure 6 for Figure 5 The diagram shows the assembly of the flexible sealing tube.

[0030] Figure 7 A schematic diagram of another alternative method for the flexible tube sealing assembly;

[0031] Figure 8 A structural diagram of another optional flexible sealing tube;

[0032] Figure 9 for Figure 8 Assembly diagram of the flexible sealing tube;

[0033] Figure 10 A schematic diagram of another possible design for a flexible check valve;

[0034] Reference numerals: 1-Slit sleeve, 2-First flexible sealing cover, 3-Connecting hole, 4-Inner annular cavity, 5-Flexible sealing tube, 6-Flexible one-way valve, 7-First rigid sealing ring, 8-Second rigid sealing ring, 9-Connecting rod, 10-Insertion hole, 101-Flexible sleeve, 102-Connecting ring, 501-Pipe body, 502-First flange, 503-Operating hole, 504-Belling disc, 505-Proximal diaphragm, 506-Sealing lip, 601-Valve body, 602-Second flange, 603-Flexible valve plate.

[0035] The purpose, features, and advantages of this application will be further explained in conjunction with the embodiments and with reference to the accompanying drawings. Detailed Implementation

[0036] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0037] It should be noted that all directional indicators (such as up, down, left, right, front, back, etc.) in this utility model embodiment are only used to explain the relative positional relationship and movement of each component in a certain specific posture (as shown in the figure). If the specific posture changes, the directional indicator will also change accordingly.

[0038] In this utility model, unless otherwise explicitly specified and limited, the terms "connection," "fixing," etc., should be interpreted broadly. For example, "fixing" can mean a fixed connection, a detachable connection, or an integral part; it can mean a mechanical connection or an electrical connection; it can mean a direct connection or an indirect connection through an intermediate medium; it can mean the internal communication of two components or the interaction between two components, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0039] Furthermore, if the embodiments of this utility model involve descriptions such as "first" or "second," these descriptions are for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined with "first" or "second" may explicitly or implicitly include at least one of those features. Additionally, the meaning of "and / or" throughout the text includes three parallel solutions; for example, "A and / or B" includes solution A, solution B, or a solution where both A and B are satisfied simultaneously. Furthermore, the technical solutions of the various embodiments can be combined with each other, but this must be based on the ability of those skilled in the art to implement them. When the combination of technical solutions is contradictory or impossible to implement, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection claimed by this utility model.

[0040] Example:

[0041] Reference Figures 1 to 4 This embodiment, as an optional implementation of this application, discloses a single-hole multi-channel sheath system, including a slit sleeve 1 and a first flexible sealing cover 2. The slit sleeve 1 includes a flexible sleeve 101 with an integral cylindrical hollow tubular structure. Along the axial direction of the flexible sleeve 101, a connecting ring 102 is provided at one end of the flexible sleeve 101. The connecting ring 102 is integrally connected to the flexible sleeve 101. Along the radial direction of the flexible sleeve 101, the outer wall of the connecting ring 102 protrudes beyond the outer peripheral surface of the flexible sleeve 101.

[0042] The first flexible sealing cover 2 is a cylindrical hollow tubular structure. Along the axial direction of the first flexible sealing cover 2, one end of the first flexible sealing cover 2 is integrally connected to a proximal main dome, and the other end is provided with a distal main flange. The proximal main dome and the distal main flange are both integrally connected to the first flexible sealing cover 2.

[0043] An inner annular cavity 4 is provided on the inner side of the distal main flange. The cross-section of the inner annular cavity 4 is adapted to the cross-section of the connecting ring 102. The connecting ring 102 is inserted into the inner annular cavity 4, and the outer peripheral surface of the connecting ring 102 is tightly fitted to the inner wall of the inner annular cavity 4, thereby realizing the airtight connection between the cut sleeve 1 and the first flexible sealing cover 2. The above connection method also has the advantages of simple structure and convenient assembly and disassembly.

[0044] It should be noted that "proximal" and "distal" both refer to the end furthest from the medical staff along the axial insertion direction of the surgical instrument; the end furthest from the medical staff is the distal end, and vice versa.

[0045] A plurality of connection holes 3 are provided on the proximal main dome, and each of the connection holes 3 is provided with a flexible tube sealing assembly for inserting surgical instruments. Each of the flexible tube sealing assemblies is sealed to the first flexible sealing cover 2 through a rigid sealing assembly.

[0046] The flexible tube sealing assembly includes a flexible sealing tube 5 and a flexible one-way valve 6. The flexible sealing tube 5 includes a tube body 501 and a first flange 502. Along the axial direction of the tube body 501, a proximal membrane 505 is integrally connected to one end of the tube body 501. An operating hole 503 coaxial with the tube body 501 is provided on the proximal membrane 505.

[0047] The other end of the pipe body 501 is connected to the first flange 502 via a corrugated plate 504; both the first flange 502 and the corrugated plate 504 are annular in structure. The corrugated plate 504 includes at least one complete set of crests and troughs. The outer side of the corrugated plate 504 is integrally connected to the first flange 502, and its inner side is integrally connected to the outer circumferential surface of the pipe body 501. That is, both the first flange 502 and the corrugated plate 504 extend along the radial direction of the pipe body 501; the first flange 502 is also provided with several connecting holes 3.

[0048] The flexible one-way valve 6 includes a valve body 601 and a second flange 602. The valve body 601 is generally cylindrical and tubular, while the second flange 602 is annular. Along the axial direction of the valve body 601, the outer circumferential surface of one end of the valve body 601 is integrally connected to the inner surface of the second flange 602, that is, the second flange 602 extends radially along the valve body 601. The second flange 602 is also provided with a plurality of connection holes 3.

[0049] The other end of the valve body 601 is provided with a plurality of flexible valve plates 603. Each flexible valve plate 603 is arranged around the axial direction of the valve body 601. Along the axial direction of the valve body 601, one end of each flexible valve plate 603 is integrally connected to the valve body 601, and the other end extends toward the central axis of the valve body 601. The ends of each valve body 601 extending toward the central axis overlap each other, thereby sealing the end of the valve body 601 away from the second flange 602.

[0050] It should be noted that, along the axis of the valve body 601, each of the flexible valve plates 603 extends away from the second flange 602 and overlaps with each other, thereby controlling the flexible one-way valve 6 to open only in the direction of insertion of surgical instruments.

[0051] Furthermore, the first flexible sealing cover 2, the flexible sealing tube 5, and the flexible one-way valve 6 are all fully flexible structures made of soft rubber materials (such as silicone, rubber, latex, etc.). By controlling the materials mentioned above, the flexibility of the first flexible sealing cover 2, the flexible sealing tube 5, and the flexible one-way valve 6 can be guaranteed. On the one hand, this can meet the operational requirements of surgical instruments at any extreme angle within the hemispherical space. On the other hand, the above-mentioned flexible structures can undergo plastic deformation under external extrusion pressure, thereby more tightly fitting and connecting with each other, which is beneficial to improving the airtightness of the equipment.

[0052] The rigid sealing assembly includes a first rigid sealing ring 7 and a second rigid sealing ring 8. Both the first rigid sealing ring 7 and the second rigid sealing ring 8 are annular structures. Both the first rigid sealing ring 7 and the second rigid sealing ring 8 are made of engineering plastics such as polycarbonate and polypropylene, or they can be made of metal materials.

[0053] It should also be noted that the flexibility mentioned in this application refers to the ability to undergo elastic deformation under the action of external force, while rigidity refers to the inability to undergo elastic deformation under the action of external force. Specifically, in this field, the aforementioned external force refers to the squeezing and pulling force exerted by the surgical instruments on various components during the operation.

[0054] Along the axis of the first rigid sealing ring 7, a plurality of connecting rods 9 are provided on the lower end face of the first rigid sealing ring 7. Each of the connecting rods 9 is evenly arranged around the axis of the first rigid sealing ring 7 and is integrally connected to the first rigid sealing ring 7; the second rigid sealing ring 8 is provided with the same number of insertion holes 10.

[0055] Along the axial direction of the connecting hole 3, the top surface of the near-end main dome is the upper end surface of the connecting hole 3, and the bottom surface of the near-end main dome is the lower end surface of the connecting hole 3. During assembly, along the axial direction of the connecting hole 3, from the upper end surface to the lower end surface of the connecting hole 3, a first rigid sealing ring 7, a flexible sealing tube 5, a flexible one-way valve 6, and a second rigid sealing ring 8 are sequentially arranged, and the first rigid sealing ring 7, the flexible sealing tube 5, the flexible one-way valve 6, and the second rigid sealing ring 8 are all coaxial with the connecting hole 3.

[0056] That is, the bottom surface of the first flange 502 is in close contact with the upper end surface of the connecting hole 3, the bottom surface of the first rigid sealing ring 7 is in close contact with the top surface of the first flange 502, the top surface of the second flange 602 is in close contact with the lower end surface of the connecting hole 3, and the top surface of the second rigid sealing ring 8 is in close contact with the bottom surface of the second flange 602.

[0057] Meanwhile, each of the connecting rods 9 passes through the first flange 502, the near-end main dome and the second flange 602 and is respectively connected to the insertion hole 10. The connecting rod 9 and the insertion hole 10 are interference fit.

[0058] The above structure effectively ensures strong rigidity in the connection area between each flexible sealing tube 5 component and the first flexible sealing cover 2, preventing deformation during operation. This improves the sealing performance of the equipment and ensures strong local rigidity in some areas while maintaining the overall flexibility of the sheath system. This allows for operation at any extreme angle within the hemispherical space, improving the flexibility of instrument operation. Furthermore, the achievement of the extreme operating angle ensures that there is no interference between instruments when performing multiple instrument operations.

[0059] Furthermore, the inner diameter D1 of the operating hole 503, the inner diameter D2 of the tube body 501, and the inner diameter D3 of the first rigid sealing ring 7 satisfy D3>D2≥3D1;

[0060] After assembly, along the axial direction of the sheath system, the distance from the top surface of the first sealing ring to the bottom surface of the second sealing ring is H2, and the distance from the top surface of the proximal membrane 505 to the top surface of the distal main flange is H1, then H1≥5H2 is satisfied;

[0061] Furthermore, the heights of the flexible sealing tubes 5 in each flexible tube sealing assembly are different or the same, that is, the heights of the flexible sealing tubes 5 are L1, L2, L3 and L4; the height difference between any two adjacent flexible sealing tubes 5 is greater than the thickness L0 of the first rigid sealing ring 7, such as L2-L1>L0, L3-L2>L0, L3-L4>L0, L4-L1>L0.

[0062] Engineering practice has shown that, under the above-mentioned dimensional parameters, the sheath system has better operability, that is, it can better achieve operation at any extreme angle within the hemispherical space, thereby better avoiding interference between various surgical instruments.

[0063] Furthermore, refer to Figure 5 and Figure 6 Along the axial direction of the tube body 501, a proximal membrane 505 is integrally connected to one end of the tube body 501. The proximal membrane 505 is provided with an operating hole 503 coaxial with the tube body 501. The proximal membrane 505 is also provided with a plurality of sealing lips 506. Each sealing lip 506 is independent of each other, that is, a dividing groove is provided between any two adjacent sealing lips 506. Each sealing lip 506 is evenly arranged around the axis of the operating hole 503.

[0064] The cutting of several sealing lips 506 on the proximal end through the dividing groove serves several purposes. Firstly, it increases the circumferential circumference, reduces the sealing area formed after the instrument is inserted, reduces the contact area between the instrument and the proximal membrane 505, improves lubrication reliability, and increases axial tensile stiffness. This reduces frictional resistance and stick-slip, decreases the probability of the proximal membrane 505 flipping inward, and also improves operational comfort after the sealing membrane flips inward. Secondly, the dividing groove circumferentially disconnects the junction area between the tube wall 501 and the proximal membrane 505. The dividing groove acts as a buffer zone for compression deformation. When the flexible sealing tube 5 is compressed and deformed, it helps to reduce the deformation force and the pulling effect of the deformation force on the sealing lips 506.

[0065] Furthermore, refer to Figure 7 The flexible sealing tube 5 with sealing lip 506 can also be used in combination with the flexible sealing tube 5 without sealing lip 506. At the same time, different flexible sealing tubes 5 can be selected according to the diameter of the operating hole 503, so as to meet the usage requirements of various surgical instruments of different specifications in one sheath system.

[0066] See Figure 8 and Figure 9As another optional embodiment of this application, it includes a flexible tube sealing assembly, which includes a flexible sealing tube 5 and a flexible one-way valve 6. The flexible sealing tube 5 includes a tube body 501. Along the axial direction of the tube body 501, one end of the tube body 501 is provided with an operation hole 503, and the other end is integrally connected to the first flexible sealing cover 2.

[0067] Around the axis of the tube body 501, a plurality of insertion holes 10 are provided on the first flexible sealing cover 2. Each connecting rod 9 on the first rigid sealing ring 7 passes through the first flexible sealing cover 2 and the second flange 602 and is inserted into the insertion hole 10 on the second rigid sealing ring 8.

[0068] See Figure 10 As another optional embodiment of this application, it includes a flexible tube sealing assembly, which includes a flexible sealing tube 5 and a flexible one-way valve 6, wherein the flexible one-way valve 6 includes a valve body 601, and along the axial direction of the valve body 601, one end of the valve body 601 is integrally connected to the first flexible sealing cover 2, and the other end is provided with a plurality of flexible valve plates 603.

[0069] In the above structure, the integral connection between the flexible sealing tube 5 or the flexible one-way valve 6 and the first flexible sealing cover 2 can reduce the number of parts in the entire sheath system, thereby simplifying the structure and improving the reliability and stability of the sheath system; at the same time, the above structure can also simplify the assembly process, which is conducive to improving assembly efficiency and assembly quality.

[0070] The above are merely preferred embodiments of this application and do not limit the scope of this patent application. Any equivalent structural or procedural transformations made using the content of this application's specification and drawings, or direct or indirect applications in other related technical fields, are similarly included within the scope of patent protection of this application.

Claims

1. A single hole, multi-channel sheath system, characterized in that, The cutting sleeve (1) comprises a flexible sleeve (101), and the flexible sleeve (101) is provided with a connecting ring (102) at one end in the axial direction. The first flexible sealing cover (2) is provided with an inner ring cavity (4), and the connecting ring (102) is clamped into the inner ring cavity (4). The flexible tube sealing assembly comprises a flexible sealing tube (5) and a flexible one-way valve (6), and the flexible sealing tube (5) is tightly attached to the outer end surface of the connecting hole (3) in the axial direction of the connecting hole (3).

2. The single hole, multiple access sheath system of claim 1, wherein, The rigid sealing assembly comprises a first rigid sealing ring (7) and a second rigid sealing ring (8), and the first rigid sealing ring (7) is tightly attached to the flexible sealing tube (5) in the axial direction of the flexible sealing tube (5).

3. The single hole, multiple passage sheath system of claim 1, wherein, The flexible sealing tube (5) comprises a tube body (501) and a first flange plate (502), and one end of the tube body (501) is provided with an operation hole (503) in the axial direction of the tube body (501).

4. The single hole, multiple access sheath system of claim 1, wherein, The inner diameter D1 of the operation hole (503), the inner diameter D2 of the tube body (501) and the inner diameter D3 of the first rigid sealing ring (7) satisfy D3>D2≥3D1.

5. A single hole, multiple passage sheath system as defined in claim 4, wherein, In the axial direction of the tube body (501), one end of the tube body (501) is integrally connected with a proximal end membrane (505), and the proximal end membrane (505) is provided with an operation hole (503) and a plurality of mutually independent sealing lips (506).

6. A single hole, multiple passage sheath system as defined in claim 5, wherein, The flexible sealing tube (5) comprises a tube body (501), and one end of the tube body (501) is provided with an operation hole (503) in the axial direction of the tube body (501).

7. A single hole, multiple passage sheath system as defined in claim 5, wherein, ​ 8. The single hole, multiple passage sheath system of claim 3, wherein, ​ 9. A single hole, multiple passage sheath system as defined in claim 3, wherein, The flexible one-way valve (6) comprises a valve body (601), along the axial direction of the valve body (601), one end of the valve body (601) is provided with a second flange plate (602), and the other end is provided with a plurality of flexible valve plates (603); each valve plate is arranged around the axis of the valve body (601), one end of each valve plate is integrally connected with the valve body (601), and the other end is overlapped with each other to close the valve body (601).

10. The single hole, multiple passage sheath system of claim 3, wherein, The flexible one-way valve (6) comprises a valve body (601), along the axial direction of the valve body (601), one end of the valve body (601) is integrally connected with the first flexible sealing cover (2), and the other end is provided with a plurality of flexible valve plates (603); each valve plate is arranged around the axis of the valve body (601), one end of each valve plate is integrally connected with the valve body (601), and the other end is overlapped with each other to close the valve body (601).

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