Gastrointestinal polyp excision device

Abstract

The invention discloses a gastrointestinal polyp excision device, and relates to the field of medical instruments, the gastrointestinal polyp excision device comprises an endoscope tube and an excision assembly, the excision assembly is sleeved in the endoscope tube and is used for excising polyp when the front end of the endoscope tube reaches the gastrointestinal polyp position, and the excision assembly can have a first form and a second form under external constraint. The first form is a cutting form, and when the excision assembly is in the first form, the excision assembly extends out of the front end of the endoscope tube, and an annular structure is formed at the front end of the endoscope tube; the second form is a storage form, and when the excision assembly is in the second form, the excision assembly is completely stored in the endoscope tube. When aiming at a polyp with a large diameter at the front end, the device can be directly divided into two parts, the two parts are respectively sleeved and closed from the lower part of the polyp, and the bottom of the polyp is wrapped for one-time cutting, so that the cutting efficiency of the polyp with the large diameter at the front end is improved.

Description

Technical Field

[0001] The present invention relates to the field of medical devices, and in particular to a gastrointestinal polyp removal device. Background Art

[0002] As is well known, gastrointestinal polyp removal is a common and important procedure in endoscopic gastrointestinal surgery. With the advancement of endoscopic technology, resection devices for various types of polyps have also evolved. Existing resection devices typically utilize a ring-shaped resection structure that extends through the endoscope tube and inserts into the base of the polyp for resection. This method can effectively remove polyps in many cases. However, there are certain technical limitations for resecting larger polyps.

[0003] Current circular resection devices are typically designed with a relatively small resection structure (due to the limitations of the lumen), which reduces resection efficiency in narrow cavities or complex anatomical structures. When dealing with larger polyps or those located in complex anatomical locations, existing circular resection structures often struggle to fully penetrate the base of the polyp, rendering it impossible to remove it in one go. In these cases, doctors must rely on other resection devices, gradually resecting the polyp from its base multiple times.

[0004] This step-by-step resection method not only increases surgical complexity and duration, but also increases patient risk. Furthermore, repeated manipulation can lead to tissue damage at the resection site, increasing the likelihood of postoperative complications. Consequently, the inefficiency of existing resection devices in treating large polyps has become a pressing technical challenge in the endoscopic resection of gastrointestinal polyps. Summary of the Invention

[0005] (1) Purpose of the invention

[0006] In view of this, the purpose of the present invention is to propose a gastrointestinal polyp resection device, which can be directly divided into two parts when targeting polyps with a larger front end diameter. The two parts are respectively inserted and closed from the bottom of the polyp, wrapping the bottom of the polyp for one-time cutting, thereby improving the resection efficiency for polyps with a larger front end diameter.

[0007] (2) Technical solution

[0008] To achieve the above technical objectives, the present invention provides a gastrointestinal polyp removal device, which includes an endoscope tube, which is used to be inserted into the patient's stomach;

[0009] a resection assembly, which is sleeved in the endoscope tube and is used to resect the polyp when the front end of the endoscope tube reaches the location of the polyp in the stomach and intestines;

[0010] In which, the resection component can have a first form and a second form under external constraints, wherein the first form is a cutting form. When the resection component is in the first form, the resection component extends from the front end of the endoscope tube to form an annular structure at the front end of the endoscope tube. The annular structure can wrap the root of the polyp to perform polyp resection; the second form is a storage form. When the resection component is in the second form, the resection component is completely stored in the endoscope tube so that the resection component will not affect the insertion of the endoscope tube into the patient's body. The resection component can be controlled to switch between the first form and the second form. An electric knife head for resecting polyps is embedded in the inner side of the resection component. The electric knife head is made of elastic nickel-titanium alloy so that it can cooperate with the resection component to perform shape transformation.

[0011] As a further description of the above technical solution: the resection component adopts a split combination structure, and the resection component includes a first ring body and a second ring body. The first ring body and the second ring body both adopt a semi-circular ring structure. When the resection component is in the first form, the front ends of the first ring body and the second ring body are connected to form a complete circular ring structure. When the resection component is in the second form, the first ring body and the second ring body are separated and accommodated in the endoscope tube. Such a structural setting allows the device to be directly divided into two parts when targeting polyps with a larger front end diameter, and the two parts are respectively inserted and closed from the bottom of the polyp to wrap the bottom of the polyp for one-time cutting, thereby improving the resection efficiency for polyps with a larger front end diameter.

[0012] As a further description of the above technical solution: the first ring body and the second ring body are both made of elastic and rigid materials. Based on this, when it is necessary to cover the bottom of the polyp from both sides, the first ring body is first controlled to extend from the front end of the endoscope tube. After the first ring body extends from the front end of the endoscope tube, it is restored to form a semicircular structure at the front end of the endoscope tube. Then, the semicircular first ring body is inserted from one side of the polyp to half-cover the bottom of the polyp. Then, the second ring body is controlled to extend from the front end of the endoscope tube. After the second ring body extends from the front end of the endoscope tube, a semicircular structure is formed at the front end of the endoscope tube, and the front end of the second ring body is automatically connected to the first ring body to form a complete circular ring structure that completely covers the bottom of the polyp.

[0013] As a further description of the above technical solution: a positioning recessed hole is provided on the front end face of the first ring body, a positioning magnet is provided on the front end face of the second ring body, a metal material that can generate magnetic attraction with the positioning magnet is embedded inside the positioning recessed hole, and the positions of the positioning magnet and the positioning recessed hole correspond to each other, so that after the first ring body and the second ring body are docked, the positioning magnet can be attracted into the positioning recessed hole under the action of the magnetic attraction force, thereby realizing rapid alignment and docking of the first ring body and the second ring body.

[0014] As a further description of the above technical solution: at least two positioning magnets and at least two positioning recessed holes are provided, so that after the positioning magnets and the positioning recessed holes are docked and attracted, the cutting assembly will not be offset.

[0015] As a further description of the above technical solution: the electric knife head adopts a segmented structure, and the two sections of the electric knife head are respectively embedded in the inner sides of the first ring body and the second ring body. A conductive socket is provided on the front end face of the first ring body, and a conductive plug-in is provided on the front end face of the second ring body at a corresponding position of the conductive socket. When the first ring body and the second ring body are docked, the conductive plug-in is inserted into the conductive socket. When the conductive plug-in is inserted into the conductive socket, the circuit of the two sections of the electric knife head is connected to form a complete electric knife structure.

[0016] Specifically, in order to facilitate the docking of the first ring body and the second ring body, the positioning magnet adopts a hemispherical structure. Therefore, when the first ring body and the second ring body are docked, the positioning magnet can be quickly guided and sucked into the positioning recess to achieve rapid docking. In order to avoid the conductive plug-in hindering the attraction and docking of the positioning magnet, the conductive plug-in also adopts a hemispherical structure.

[0017] As a further description of the above technical solution: two inner sleeves are provided inside the front end of the endoscope tube, and the first ring body and the second ring body are respectively sleeved in the inner sleeves, and the first ring body and the second ring body can slide in the inner sleeves, thereby realizing the morphological transformation of the resection assembly, and the ends of the first ring body and the second ring body are connected to control guide wires, and the control guide wires extend from the end of the endoscope tube.

[0018] As a further description of the above technical solution: the inner wall of the inner sleeve is provided with a limiting groove with a semicircular cross-section along the length direction, and the ends of the first ring body and the second ring body are provided with movable inner tubes, and the outside of the movable inner tube is provided with a limiting edge that can adapt to the limiting groove, and the limiting edge can slide in the limiting groove. Based on this, when the first ring body and the second ring body are transformed from the second form to the first form, no rotation will be found, so the relative positions of the first ring body and the second ring body are fixed, so that when they are transformed into the first form, the front ends of the two can be quickly aligned.

[0019] As a further description of the above technical solution: the front end of the endoscope tube is provided with a front cover of a lens, and the front cover adopts a hemispherical structure. The front end of the endoscope tube is located in the front cover, and a camera for collecting gastrointestinal images of the patient's body and an LED light board for lighting are installed in the front cover. Specifically, the front end of the inner sleeve extends to the inner wall of the front cover.

[0020] As a further description of the above technical solution: a filling part is provided inside the endoscope tube in the area of the inner sleeve, and the gap between the endoscope tubes is filled by the inner sleeve through the filling part. The filling part is made of sponge or silicone.

[0021] In the above technical solution, the present invention provides a gastrointestinal polypectomy device, which designs the resection component for resecting the patient's polyps into a two-section structure, namely a first ring member and a second ring member, and the electric knife head is also divided into two sections and embedded in the first ring member and the second ring member. The first ring member, the second ring member and the electric knife head are structurally designed so that they can be respectively accommodated in the endoscope tube during the non-resection process to ensure that the insertion of the endoscope tube is not hindered. When polypectomy is required, it can extend from the front end of the endoscope tube and combine to form a complete annular resection component, thereby realizing polypectomy, which is easy to operate. In addition, the resection component design of this structure enables the device to be directly divided into two parts when targeting polyps with a larger front diameter, and the two parts are respectively inserted and closed from the bottom of the polyp to wrap the bottom of the polyp for one-time cutting, thereby improving the resection efficiency for polyps with a larger front diameter. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are merely embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on the provided drawings without paying any creative work.

[0023] Figure 1 A schematic diagram of the overall structure of a gastrointestinal polyp removal device provided by the present invention;

[0024] Figure 2 A partial cross-sectional view of the front end of an endoscope tube in a gastrointestinal polyp removal device provided by the present invention;

[0025] Figure 3 A schematic diagram of the internal structure of a front cover of a gastrointestinal polyp removal device provided by the present invention;

[0026] Figure 4 This is a schematic structural diagram of the first ring member in a gastrointestinal polyp removal device provided by the present invention;

[0027] Figure 5 A schematic diagram of the installation structure of the second ring member in a gastrointestinal polyp removal device provided by the present invention;

[0028] Figure 6 A schematic diagram of the installation structure of a movable inner tube in a gastrointestinal polyp removal device provided by the present invention;

[0029] Figure 7 This is a schematic structural diagram of a gastrointestinal polypectomy device provided by the present invention when the second ring is retracted into the movable inner tube.

[0030] Description of the drawings: 1. Endoscope tube; 2. Resection assembly; 20. First ring body; 200. Positioning recess; 201. Conductive socket; 21. Second ring body; 210. Positioning magnet; 211. Conductive plug-in; 22. Electric knife head; 3. Control guide wire; 4. Front cover; 5. Filling part; 6. Inner sleeve; 60. Limiting groove; 7. Movable inner tube; 70. Limiting edge; 8. LED light board; 9. Camera. DETAILED DESCRIPTION

[0031] The following description is merely illustrative in nature and is not intended to limit the present disclosure, its applications, or uses. It should be understood that throughout the drawings, identical or similar reference numerals indicate identical or similar parts and features. The drawings merely schematically illustrate the concepts and principles of the embodiments of the present disclosure and do not necessarily depict the specific dimensions and proportions of the various embodiments of the present disclosure. Certain portions of certain drawings may be exaggerated to illustrate relevant details or structures of the embodiments of the present disclosure.

[0032] Example 1

[0033] like Figure 1-Figure 7 As shown: This embodiment provides a technical solution: a gastrointestinal polyp removal device, comprising an endoscope tube 1 and a removal assembly 2, wherein the endoscope tube 1 is used to be inserted into the patient's stomach and intestines, and the removal assembly 2 is sleeved in the endoscope tube 1 and is used to remove the polyp when the front end of the endoscope tube 1 reaches the location of the polyp in the stomach and intestines;

[0034] The resection component 2 can have a first form and a second form under external constraints, wherein the first form is a cutting form. When the resection component 2 is in the first form, the resection component 2 extends from the front end of the endoscope tube 1, forming a ring structure at the front end of the endoscope tube 1. The ring structure can wrap the root of the polyp to perform polyp resection; the second form is a storage form. When the resection component 2 is in the second form, the resection component 2 is completely stored in the endoscope tube 1, so that the resection component 2 will not affect the insertion of the endoscope tube 1 into the patient's body. The resection component 2 can be controlled to switch between the first form and the second form. An electric knife head 22 for resecting polyps is embedded in the inner side of the resection component 2. The electric knife head 22 is made of elastic nickel-titanium alloy, so that it can cooperate with the resection component 2 to change its form.

[0035] Working principle: During use, first, during the process of inserting the endoscope tube 1 into the patient's body, the resection component 2 is in the second form, that is, the resection component 2 is completely housed in the endoscope tube 1, so as to prevent the endoscope tube 1 from being obstructed by the resection component 2 during the insertion into the patient's body. After the endoscope tube 1 is inserted into the predetermined position in the patient's body, the resection component 2 is controlled to be converted into the first form, so that the resection component 2 extends from the front end of the endoscope tube 1 to form an annular structure, wrapping the root of the polyp, and performing polyp resection. After the resection is completed, the resection component 2 is controlled to be converted into the second form again, and the endoscope tube 1 can be taken out. The operation is convenient and quick.

[0036] Specifically, such as Figure 1-Figure 5 As shown, due to the limited diameter of the gastrointestinal tract, it is difficult to achieve one-time resection of some polyps with a larger front end diameter. In order to solve this problem, in this embodiment, the resection component 2 adopts a split combined structure, and the resection component 2 includes a first ring body 20 and a second ring body 21. The first ring body 20 and the second ring body 21 both adopt a semi-circular ring structure. When the resection component 2 is in the first form, the front ends of the first ring body 20 and the second ring body 21 are connected to form a complete circular ring structure. When the resection component 2 is in the second form, the first ring body 20 and the second ring body 21 are separated and accommodated in the endoscope tube 1. Such a structural setting allows the device to be directly divided into two parts when targeting polyps with a larger front end diameter, and the two parts are respectively inserted and closed from the bottom of the polyp to wrap the bottom of the polyp for one-time cutting, thereby improving the resection efficiency for polyps with a larger front end diameter.

[0037] Specifically, such as Figure 1-Figure 5 As shown, in order to enable the resection component 2 to cover the bottom of the polyp from both sides when it is converted from the second form to the first form, in this embodiment, the first ring body 20 and the second ring body 21 are both made of elastic and rigid materials (such as carbon fiber composite materials, nickel-titanium alloy, etc.). Based on this, when it is necessary to cover the bottom of the polyp from both sides, the first ring body 20 is first controlled to extend from the front end of the endoscope tube 1. After the first ring body 20 extends from the front end of the endoscope tube 1, it is restored to form a semicircular structure at the front end of the endoscope tube 1. Then, the semicircular first ring body 20 is inserted from one side of the polyp to half-cover the bottom of the polyp. Then, the second ring body 21 is controlled to extend from the front end of the endoscope tube 1. After the second ring body 21 extends from the front end of the endoscope tube 1, a semicircular structure is formed at the front end of the endoscope tube 1, and the front end of the second ring body 21 is automatically connected to the first ring body 20 to form a complete circular ring structure that completely covers the bottom of the polyp.

[0038] Specifically, such as Figure 4-Figure 5As shown, in order to realize the rapid alignment and docking of the first ring body 20 and the second ring body 21 when the cutting component 2 is converted from the second form to the first form, in this embodiment, a positioning recessed hole 200 is provided on the front end face of the first ring body 20, and a positioning magnet 210 is provided on the front end face of the second ring body 21. The interior of the positioning recessed hole 200 is embedded with a metal material that can generate magnetic attraction with the positioning magnet 210. The positions of the positioning magnet 210 and the positioning recessed hole 200 correspond to each other, so that after the first ring body 20 and the second ring body 21 are docked, the positioning magnet 210 can be attracted into the positioning recessed hole 200 under the action of the magnetic attraction, thereby realizing the rapid alignment and docking of the first ring body 20 and the second ring body 21.

[0039] Specifically, such as Figure 4-Figure 5 As shown, in order to improve the stability of the first ring body 20 and the second ring body 21 after docking, in this embodiment, at least two positioning magnets 210 and positioning recesses 200 are provided, so that after the positioning magnets 210 and the positioning recesses 200 are docked and attracted, the cutting component 2 will not be offset.

[0040] Specifically, such as Figure 4-Figure 5 As shown, in order to ensure that the electric knife head 22 can cooperate with the resection component 2 to undergo morphological transformation, in this embodiment, the electric knife head 22 adopts a segmented structure, and the two sections of the electric knife head 22 are respectively embedded in the inner sides of the first ring body 20 and the second ring body 21. A conductive socket 201 is provided on the front end face of the first ring body 20, and a conductive plug-in 211 is provided on the front end face of the second ring body 21 at a corresponding position of the conductive socket 201. When the first ring body 20 and the second ring body 21 are docked, the conductive plug-in 211 is inserted into the conductive socket 201. When the conductive plug-in 211 is inserted into the conductive socket 201, the circuit of the two sections of the electric knife head 22 is connected, forming a complete electric knife structure.

[0041] Specifically, in order to facilitate the docking of the first ring body 20 and the second ring body 21, the positioning magnet 210 adopts a hemispherical structure. Therefore, when the first ring body 20 and the second ring body 21 are docked, the positioning magnet 210 can be quickly guided and sucked into the positioning recess 200 to achieve rapid docking. In order to avoid the conductive plug-in 211 hindering the positioning magnet 210 from being attracted and docked, the conductive plug-in 211 also adopts a hemispherical structure.

[0042] Specifically, such as Figure 3-Figure 7 As shown, in order to be able to independently manipulate the first ring body 20 and the second ring body 21 to achieve the morphological transformation of the resection component 2, in this embodiment, two inner sleeves 6 are provided inside the front end of the endoscope tube 1, and the first ring body 20 and the second ring body 21 are respectively sleeved in the inner sleeve 6, and the first ring body 20 and the second ring body 21 can slide in the inner sleeve 6, thereby achieving the morphological transformation of the resection component 2, and the ends of the first ring body 20 and the second ring body 21 are connected to the control guide wire 3, and the control guide wire 3 extends from the end of the endoscope tube 1.

[0043] Example 2

[0044] like Figure 3-Figure 7 As shown: This embodiment provides a technical solution: In order to ensure that the first ring body 20 and the second ring body 21 can be quickly aligned when changing from the second form to the first form, in this embodiment, the inner wall of the inner sleeve 6 is provided with a limiting groove 60 with a semicircular cross-section along the length direction, and the ends of the first ring body 20 and the second ring body 21 are provided with a movable inner tube 7, and the outside of the movable inner tube 7 is provided with a limiting edge 70 that can adapt to the limiting groove 60, and the limiting edge 70 can slide in the limiting groove 60. Based on this, when the first ring body 20 and the second ring body 21 are changed from the second form to the first form, no rotation will be found. Therefore, the relative positions of the first ring body 20 and the second ring body 21 are fixed, so that when they are changed into the first form, the front ends of the two can be quickly aligned.

[0045] Specifically, such as Figure 3-Figure 7 As shown, in order to enable the front end of the endoscope tube 1 to better accommodate the first ring body 20 and the second ring body 21, and to facilitate the insertion of the endoscope tube 1 into the patient's body, in this embodiment, the front end of the endoscope tube 1 is provided with a front cover 4 of a lens, and the front cover 4 adopts a hemispherical structure. The front end of the endoscope tube 1 is located in the front cover 4 and is equipped with a camera 9 for collecting gastrointestinal images in the patient's body and an LED light board 8 for lighting. Specifically, the front end of the inner sleeve 6 extends to the inner wall of the front cover 4.

[0046] Specifically, such as Figure 2 As shown, in order to ensure the stability of the inner sleeve 6 in the endoscope tube 1 and prevent it from rotating as a whole, in this embodiment, a filling portion 5 is provided in the area of the inner sleeve 6 inside the endoscope tube 1, and the gap between the endoscope tube 1 and the endoscope tube 1 is filled with the inner sleeve 6 through the filling portion 5. The filling portion 5 is made of sponge or silicone.

[0047] The exemplary implementation schemes proposed in the present disclosure are described in detail above with reference to preferred embodiments. However, it will be understood by those skilled in the art that, without departing from the concept of the present disclosure, various modifications and variations can be made to the above-mentioned specific embodiments, and various technical features and structures proposed in the present disclosure can be combined in various ways without exceeding the scope of protection of the present disclosure, which is determined by the appended claims.

Claims

1. A gastrointestinal polyp removal device, characterized in that: It includes: An endoscope tube (1) for inserting into the patient's stomach; A resection assembly (2) is sleeved in the endoscope tube (1) and is used to resect the polyp when the front end of the endoscope tube (1) reaches the location of the polyp in the stomach and intestines; The resection component (2) can have a first form and a second form under external constraints, wherein the first form is a cutting form. When the resection component (2) is in the first form, the resection component (2) extends from the front end of the endoscope tube (1) to form a ring structure at the front end of the endoscope tube (1); the second form is a storage form. When the resection component (2) is in the second form, the resection component (2) is completely stored in the endoscope tube (1). The resection component (2) can be controlled to switch between the first form and the second form. An electric knife head (22) for removing polyps is embedded inside the resection component (2).

2. The gastrointestinal polyp removal device according to claim 1, characterized in that: The resection assembly (2) adopts a split combined structure, and the resection assembly (2) includes a first ring body (20) and a second ring body (21). The first ring body (20) and the second ring body (21) both adopt a semi-circular ring structure. When the resection assembly (2) is in a first form, the front ends of the first ring body (20) and the second ring body (21) are connected to form a complete circular ring structure. When the resection assembly (2) is in a second form, the first ring body (20) and the second ring body (21) are separately accommodated in the endoscope tube (1).

3. The gastrointestinal polyp removal device according to claim 2, characterized in that: The first ring body (20) and the second ring body (21) are both made of materials with elasticity and rigidity.

4. The gastrointestinal polyp removal device according to claim 3, characterized in that: A positioning recessed hole (200) is provided on the front end surface of the first ring body (20), and a positioning magnet (210) is provided on the front end surface of the second ring body (21). A metal material capable of generating magnetic attraction with the positioning magnet (210) is embedded inside the positioning recessed hole (200). The positions of the positioning magnet (210) and the positioning recessed hole (200) correspond to each other, so that after the first ring body (20) and the second ring body (21) are docked, the positioning magnet (210) can be attracted into the positioning recessed hole (200) under the action of the magnetic attraction.

5. The gastrointestinal polyp removal device according to claim 4, characterized in that: At least two of the positioning magnets (210) and the positioning recessed holes (200) are provided, so that after the positioning magnets (210) and the positioning recessed holes (200) are docked and attracted, the cutting assembly (2) will not deviate.

6. The gastrointestinal polyp removal device according to claim 4, characterized in that: The electric knife head (22) adopts a segmented structure, and the two segments of the electric knife head (22) are respectively embedded in the inner sides of the first ring body (20) and the second ring body (21); a conductive socket (201) is provided on the front end surface of the first ring body (20); a conductive plug (211) is provided on the front end surface of the second ring body (21) at a position corresponding to the conductive socket (201); when the first ring body (20) and the second ring body (21) are docked, the conductive plug (211) is inserted into the conductive socket (201); when the conductive plug (211) is inserted into the conductive socket (201), the circuits of the two segments of the electric knife head (22) are connected, forming a complete electric knife structure.

7. The gastrointestinal polyp removal device according to claim 4, characterized in that: Two inner sleeves (6) are provided inside the front end of the endoscope tube (1), the first ring body (20) and the second ring body (21) are respectively sleeved in the inner sleeves (6), and the first ring body (20) and the second ring body (21) can slide in the inner sleeves (6), thereby realizing the morphological transformation of the resection component (2), and the ends of the first ring body (20) and the second ring body (21) are connected to a control guide wire (3), and the control guide wire (3) extends from the end of the endoscope tube (1).

8. The gastrointestinal polyp removal device according to claim 7, characterized in that: The inner wall of the inner sleeve (6) is provided with a semicircular cross-section limiting groove (60) along the length direction, and the ends of the first ring body (20) and the second ring body (21) are both provided with a movable inner tube (7), and the outer portion of the movable inner tube (7) is provided with a limiting edge (70) that can adapt to the limiting groove (60), and the limiting edge (70) can slide in the limiting groove (60).

9. The gastrointestinal polyp removal device according to claim 7, characterized in that: The front end of the endoscope tube (1) is provided with a front cover (4) of a lens, and the front cover (4) adopts a hemispherical structure. The front end of the endoscope tube (1) is located in the front cover (4), and a camera (9) for collecting gastrointestinal images of a patient's body and an LED light board (8) for lighting are installed.

10. The gastrointestinal polyp removal device according to claim 7, characterized in that: A filling portion (5) is provided inside the endoscope tube (1) at a location in the region of the inner sleeve (6), and the inner sleeve (6) is used to fill the gap between the endoscope tubes (1) and the endoscope tubes (1). The filling portion (5) is made of sponge or silicone.

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