Medical tubular body transport device

Abstract

A medical tubular body transport device (1) is provided for transporting a medical tubular body (2) into a body. The device includes an outer tube (10) having an inner cavity in which the medical tubular body (2) is disposed, a guide wire tube (80) disposed in the inner cavity of the outer tube (10) and having an inner cavity in which a guide wire is disposed, and a tubular member (90) disposed inside the outer tube (10) and outside the guide wire tube (80) and disposed on a proximal side of the medical tubular body (2). The tubular member (90) has a joint portion (91) in which the tubular member (90) and the guide wire tube (80) are joined and a non-joint portion (92) in which the tubular member (90) and the guide wire tube (80) are not joined. The non-joint portion (92) is located on a distal side of the joint portion (91).

Description

Technical Field

[0001] This invention relates to a device for transporting medical tubular bodies into the body, namely a medical tubular body transport device. Background Technology

[0002] Medical tubular bodies, such as stents, are medical devices used to treat various diseases caused by narrowing or blockage of the lumen of biological vessels such as the bile duct, pancreatic duct, etc., or blood vessels such as the iliac artery. Examples of medical tubular bodies include components placed in the diseased area to expand the narrowed or blocked area from the inside and maintain its inner diameter, or components that remove thrombi or other debris that have formed around the diseased area or in the surrounding area, thereby restoring the inner diameter of the lumen at the diseased area.

[0003] As an example of treatment using a medical tubular body with an endoscope, the following describes a method for placing a medical tubular body in the bile duct obstructed by bile duct cancer to facilitate the drainage of bile from the bile duct towards the duodenum. First, an endoscope is inserted through the mouth into the inlet (papillary) of the bile duct in the duodenum. Next, a guide liner is advanced to the lesion site through the endoscope. Then, a medical tubular body transport device is advanced to the lesion site along the guide liner. Finally, the medical tubular body transport device is operated to place the medical tubular body in the lesion site.

[0004] As a medical tubular body delivery device, there are: a delivery catheter having a sheath that can move between a closed position and an open position, including a stent housing area in the delivery catheter, and a delivery catheter having a radiation-proof indicator in the orifice area of ​​the sheath (e.g., see Patent Document 1); an implantable medical intracorporeal prosthesis delivery system having a sheath, a catheter, and a buffer, the buffer having at least some degree of freedom of movement with respect to the catheter (e.g., see Patent Document 2); a device including an outer sheath, a stent, a stent engagement element, and a stent retention element, configured such that the stent engagement element is operated in a reciprocating manner, and the stent retention element maintains contact with the stent (e.g., see Patent Document 3); a push guide line having a mandrel and a tubular component, the tubular component not fixed to the mandrel but capable of moving radially relative to the mandrel (e.g., see Patent Document 4); and a stent delivery device including an elongated pusher, a mesh portion, and a stent, the mesh portion expanding radially relative to the interior of the stent (e.g., see Patent Document 5).

[0005] Patent Document 1: Japanese Patent Application Publication No. 2020-36935

[0006] Patent Document 2: Japanese Patent Publication No. 2008-534169

[0007] Patent Document 3: Japanese Patent Application Publication No. 2013-39383

[0008] Patent Document 4: Japanese Patent Application Publication No. 2016-202248

[0009] Patent Document 5: Japanese Patent Publication No. 2019-530516

[0010] In typical medical tubular transport devices such as those in Patent Documents 1-5, a medical tubular body, such as a stent, is disposed within the inner cavity of an outer tube, and an inner tube is disposed within the inner cavity of the medical tubular body. The medical tubular body is released from the transport device by fixing the inner tube and pulling the outer tube toward the surgeon's hand. At this time, a portion of the inner tube abuts against the medical tubular body, pushing the medical tubular body out. Because the rigidity of the portion of the inner tube abutting against the medical tubular body is higher than that of the other portions, there is a problem that the medical tubular transport device is prone to kinking. Furthermore, in such medical tubular transport devices, when fixing the inner tube and pulling the outer tube toward the surgeon's hand, the axial compression resistance decreases, resulting in poor force transmission.

[0011] Furthermore, in medical tubular transport devices as described in Patent Documents 1-5, the inner tube deforms significantly relative to the outer tube when the medical tubular transport device is in a bent state. This also presents the following problem: if the medical tubular body is to be released from the medical tubular transport device while it is bent, the force pulling the outer tube towards the surgeon's hand tends to remain at the bent portion of the medical tubular transport device, making it impossible to release the medical tubular body stably. Summary of the Invention

[0012] The present invention was made in view of the above-mentioned situation, and its object is to provide a medical tubular body transport device that is not easily kinked and can stably place medical tubular bodies.

[0013] The medical tubular body transport device that solves the above-mentioned problems is a device for transporting a medical tubular body into the body, characterized by having: an outer tubular body for which the medical tubular body is disposed in an inner cavity; a guide wire tubular body disposed in the inner cavity of the outer tubular body for which a guide wire is inserted; and a tubular object disposed on the inner side of the outer tubular body and the outer side of the guide wire tubular body, and disposed on the proximal side of the medical tubular body, the tubular object having a joint portion where the tubular object and the guide wire tubular body are joined, and a non-joint portion where the tubular object and the guide wire tubular body are not joined, the non-joint portion being located on the side distal to the joint portion.

[0014] In the medical tubular transport device of the present invention, the inner diameter of the tubular object is larger than the outer diameter of the guide tube body at the non-jointing part, and the non-jointing part has a space between the inner surface of the tubular object and the outer surface of the guide tube body.

[0015] In the medical tubular body transport device of the present invention, the joint is preferably located closer to the side than the proximal end of the outer tube.

[0016] In the medical tubular transport device of the present invention, the length of the non-jointing portion is longer than the length of the joining portion in the longitudinal direction.

[0017] In the medical tubular body transport device of the present invention, preferably the cylindrical component is disposed on the inner side of the outer tube and the outer side of the guide tube, and is disposed on the proximal side of the medical tubular body and the distal side of the tubular body, and the cylindrical component is not connected to the guide tube and the tubular body.

[0018] In the medical tubular transport device of the present invention, the tubular component preferably comprises an X-ray non-transmissive material.

[0019] In the medical tubular transport device of the present invention, it is preferable to have an X-ray non-transmissive marker disposed closer to the distal end of the cylindrical component and further distal to the distal end of the tubular object.

[0020] In the medical tubular transport device of the present invention, the distal end of the tubular object preferably comprises an X-ray-proof material.

[0021] In the medical tubular transport device of the present invention, it is preferable to provide an X-ray non-transmissive marker at the non-joint portion, wherein the X-ray non-transmissive marker is not joined to the guide tube body.

[0022] In the medical tubular transport device of the present invention, the X-ray non-transmissive marker is preferably a coil made of wound wire.

[0023] In the medical tubular transport device of the present invention, it is preferable that an X-ray non-transmissive marker is disposed between the outer surface of the tubular object and the outer surface of the guide tube.

[0024] In the medical tubular transport device of the present invention, it is preferable that the X-ray non-transmissive marker is not attached to the outer surface of the tubular object and the outer surface of the guide tube.

[0025] In the medical tubular transport device of the present invention, it is preferable that the X-ray non-transmissive marker is positioned closer to the distal end of the tubular body and further to the distal end of the tubular body.

[0026] In the medical tubular transport device of the present invention, it is preferable that the thickness of the distal end of the tubular object is greater than the thickness of the proximal end of the tubular object.

[0027] In the medical tubular transport device of the present invention, it is preferable that the outer diameter of the distal end of the tubular object is larger than the outer diameter of the proximal end of the tubular object.

[0028] In the medical tubular transport device of the present invention, it is preferable that the rigidity of the distal end of the tubular object is higher than that of the proximal end of the tubular object.

[0029] The medical tubular body transport device of the present invention has a tubular member disposed on the inner side of the outer tubular body and on the outer side of the guide tube and on the proximal side of the medical tubular body. The tubular member has a joint portion where the tubular member and the guide tube are joined, and a non-joint portion where the tubular member and the guide tube are not joined. The non-joint portion is located on the side more distal than the joint portion. As a result, a rigid step difference is less likely to occur in the portion of the tubular member that abuts against the proximal end of the medical tubular body, and the guide tube is less likely to deform relative to the outer tubular body. Therefore, the medical tubular body transport device is less prone to kinking and can stably place the medical tubular body. Attached Figure Description

[0030] Figure 1 A top view showing the overall structure of a medical tubular body transport device according to one embodiment of the present invention.

[0031] Figure 2 express Figure 1 A cross-sectional view along the length of the medical tubular transport device shown.

[0032] Figure 3 A cross-sectional view along the length of a medical tubular body transport device illustrating another embodiment of the present invention. Detailed Implementation

[0033] The present invention will now be described in more detail based on the following embodiments. However, the present invention is not limited to the following embodiments, and can be implemented by appropriate modifications within the scope of the above and subsequent descriptions, all of which are included within the technical scope of the present invention. Furthermore, in the various drawings, for ease of explanation, there are instances where shaded lines, component reference numerals, etc., are omitted. In such cases, please refer to the specification and other drawings. Additionally, the dimensions of various components in the drawings are intended to aid in understanding the features of the present invention, and therefore may differ from the actual dimensions.

[0034] Figure 1 This is a top view of the entire medical tubular body transport device according to an embodiment of the present invention. Figure 2 This is a cross-sectional view along the length of a medical tubular transport device. Figure 3 This is a cross-sectional view along the length of a medical tubular body transport device according to another embodiment of the present invention. Figure 1 This invention illustrates a configuration example of a so-called quick-change type medical tubular body transport device that inserts a guide wire along the path from the distal side to the proximal side of the shaft. Furthermore, the invention can also be applied to a so-called wire-controlled type medical tubular body transport device that inserts a guide wire from the distal side to the proximal side of the shaft.

[0035] In this invention, the proximal side refers to the side closest to the user's hand relative to the extending direction of the outer tube 10, while the distal side refers to the side opposite to the proximal side, i.e., the side of the object being treated. Furthermore, the extending direction of the outer tube 10 is referred to as the length direction. The length direction can be renamed the proximal-distal direction of the outer tube 10. Radial refers to the radial direction of the outer tube 10; radially inward side refers to the direction of the outer tube 10 toward the axis center; radially outward side refers to the direction toward the side opposite to the inward side. Furthermore, in Figures 1-3 In the diagram, the right side is the proximal side, and the left side is the distal side.

[0036] The medical tubular body delivery device 1 of the present invention is a device for delivering a medical tubular body 2 into the body. Examples of medical tubular bodies 2 include stents, stent grafts, obstructions, injection catheters, and artificial valves. Stents are generally medical tubular bodies used to treat various diseases caused by narrowing or blockage of the lumens of digestive tracts such as bile ducts and blood vessels within the body. Examples of stents include coil-shaped stents formed from a single wire of metal, stents processed by laser cutting of a metal tube, stents obtained by laser welding and assembling wire-shaped components, stents made by weaving multiple wire-shaped metal components, or stents of the same shape as these metal stents but made of polymer materials.

[0037] like Figures 1-3 As shown, the medical tubular body transport device 1 includes: an outer tube 10 for housing the medical tubular body 2 within its inner cavity; a guide wire tube 80 for housing the inner cavity of the outer tube 10 for inserting the guide wire into the inner cavity; and a tubular object 90 for housing the inner side of the outer tube 10 and the outer side of the guide wire tube 80, and for housing the proximal side of the medical tubular body 2.

[0038] The tubular component 90 is used to restrict the position of the medical tubular body 2 within the lumen of the outer tube 10 and to push the medical tubular body 2 distally. Specifically, in order to release the medical tubular body 2 from the medical tubular body transport device 1, when the guide tube 80 is fixed and the outer tube 10 is pulled proximally, the tubular component 90 directly or indirectly contacts the medical tubular body 2, hindering the movement of the medical tubular body 2 within the outer tube 10, thus exposing the medical tubular body 2 from the outer tube 10.

[0039] like Figure 2 and Figure 3As shown, the tubular object 90 has a joint 91 where it engages with the guide wire body 80, and a non-joint portion 92 where it does not engage with the guide wire body 80. The non-joint portion 92 is located distal to the joint 91. Because the tubular object 90 has a joint 91 and a non-joint portion 92 distal to the joint 91, the overall rigidity of the tubular object 90 in the longitudinal direction is less likely to increase at the non-joint portion 92, and the medical tubular transport device 1 is less prone to kinking. Furthermore, because the tubular object 90 has a joint 91 and a non-joint portion 92, when the outer tube body 10 bends, the portion of the non-joint portion 92 of the tubular object 90 can move within the outer tube body 10, and the guide wire body 80 is less likely to deform significantly relative to the outer tube body 10. As a result, when the guide tube 80 is fixed in order to release the medical tubular body 2 and the outer tube 10 is pulled toward the surgeon's hand side, the force pulled toward the surgeon's hand side is easily transmitted to the outer tube 10, and the release of the medical tubular body 2 can be carried out stably.

[0040] Furthermore, in this invention, the engagement of the tubular object 90 and the guide wire body 80 means that at least a portion of the tubular object 90 and the guide wire body 80 are fixed, and the tubular object 90 and the guide wire body 80 are in a state where they cannot move radially, longitudinally, or circumferentially relative to each other. The inability of the tubular object 90 and the guide wire body 80 to move radially relative to each other means that in a cross-section perpendicular to the longitudinal direction, the tubular object 90 and the guide wire body 80 cannot be separated. The inability of the tubular object 90 and the guide wire body 80 to move longitudinally relative to each other means that in the longitudinal direction, the positional relationship between the tubular object 90 and the guide wire body 80 remains unchanged. The inability of the tubular object 90 and the guide wire body 80 to move circumferentially relative to each other means that in a cross-section perpendicular to the longitudinal direction, the tubular object 90 and the guide wire body 80 do not move, and their positional relationship remains unchanged. Additionally, in this invention, the non-engagement of the tubular object 90 and the guide wire body 80 means that the tubular object 90 and the guide wire body 80 are not in a state where they are fixed to each other.

[0041] Methods for fixing the tubular object 90 to the guide tube body 80 include, for example, bonding, welding, fitting, screwing, inserting into a heat-shrinkable resin tube and causing the resin tube to shrink, inserting into a metal tube and riveting, etc.

[0042] The tubular structure 90 is preferably composed of multiple components. Because the tubular structure 90 is composed of multiple components, when the medical tubular transport device 1 is bent, the guide wire tube 80 also bends along with the outer tube 10. However, since the component of the tubular structure 90 that serves as the non-joint portion 92 does not engage with the guide wire tube 80, the component that serves as the non-joint portion 92 can move and is not easily bent. As a result, when releasing the medical tubular body 2, even when the medical tubular transport device 1 is bent, the force pulling the outer tube 10 towards the surgeon's hand is less likely to remain at the non-joint portion 92 of the tubular structure 90, thereby enabling stable release of the medical tubular body 2.

[0043] When the tubular body 90 is composed of multiple components, it is preferable that the component serving as the non-connecting part 92 engages with the component serving as the connecting part 91. The engagement of the component serving as the non-connecting part 92 with the component serving as the connecting part 91 indicates that the component serving as the non-connecting part 92 is unable to move along the length and circumference of the guide tube 80 relative to the component serving as the connecting part 91, but is able to move radially in the guide tube 80. By engaging the component serving as the non-connecting part 92 with the component serving as the connecting part 91, the tubular body 90 does not move along its length when the medical tubular body 2 is released. This allows for precise control of the operation and timing of unfolding the medical tubular body 2, suppressing any positional deviation during its release. Furthermore, since the tubular body 90 does not move circumferentially, it does not rotate and thus does not generate friction, reducing the load during unfolding the medical tubular body 2. In addition, the tubular object 90 can move radially, so that both the tubular object 90 and the guide tube 80 can easily be positioned within the outer tube 10, making it less likely to obstruct the force that pulls the outer tube 10 toward the surgeon's hand, thus facilitating the release of the medical tubular object 2.

[0044] The outer tube 10 has a lengthwise portion and an inner lumen extending along that length, into which the medical tubular body 2 is disposed. Other components may also be disposed proximally to the outer tube 10. Specifically, such as... Figure 2 and Figure 3 As shown, in order to facilitate pulling the outer tube 10 toward the surgeon's hand, a component, such as a reinforcing component 11, for increasing the strength of the proximal end of the outer tube 10 may be provided on the proximal side of the outer tube 10. Furthermore, if other components such as the reinforcing component 11 are provided on the proximal side of the outer tube 10, these other components are not included in the outer tube 10.

[0045] Materials constituting the outer tube 10 may include, for example, polyolefin resins such as polyethylene and polypropylene, polyamide resins such as nylon, polyester resins such as PET, aromatic polyetherketone resins such as PEEK, polyether polyamide resins, polyurethane resins, polyimide resins, fluorinated resins such as PTFE, PFA, and ETFE, and synthetic resins such as polyvinyl chloride resins. Among these, a fluorinated resin is preferred, and PTFE is more preferred. The use of a fluorinated resin as the material for the outer tube 10 allows for the formation of an outer tube 10 with good sliding properties. This improved sliding property between the outer tube 10 and the medical tubular body 2 facilitates the placement of the medical tubular body 2.

[0046] Furthermore, the outer tube 10 can be a single-layer structure or a multi-layer structure. In the case of a multi-layer structure, for example, the middle layer of the resin tube constituting the outer tube 10 can be a metal braided structure using stainless steel, carbon steel, nickel-titanium alloy, etc. Alternatively, the outer tube 10 can also be a double-layer structure using a fluorine-based resin in the inner layer and a polyamide-based resin in the outer layer.

[0047] The length of the outer tube 10 in the longitudinal direction can be selected appropriately based on the length of the medical tubular body 2 disposed in the lumen. For example, the length of the outer tube 10 in the longitudinal direction can be more than 50 mm and less than 800 mm.

[0048] The outer diameter of the outer tube 10 is preferably 0.5 mm or more, more preferably 0.7 mm or more, and even more preferably 1 mm or more. By setting the lower limit of the outer diameter of the outer tube 10 within the above range, the rigidity of the distal side of the medical tubular body transport device 1 equipped with the outer tube 10 can be improved, thereby forming a medical tubular body transport device 1 with good pushing performance. In addition, the outer diameter of the outer tube 10 is preferably 3.5 mm or less, more preferably 3.3 mm or less, and even more preferably 3.0 mm or less. By setting the upper limit of the outer diameter of the outer tube 10 within the above range, the outer diameter of the distal side of the medical tubular body transport device 1 can be prevented from becoming too large, thereby improving the minimally invasiveness of the medical tubular body transport device 1. In addition, the rigidity of the distal side of the medical tubular body transport device 1 can be prevented from becoming too large, thereby improving the operability during delivery into the body.

[0049] The wall thickness of the outer tube 10 is preferably 10 μm or more, more preferably 30 μm or more, and even more preferably 50 μm or more. By setting the lower limit of the wall thickness of the outer tube 10 within the above range, the rigidity of the outer tube 10 can be improved, thereby improving the insertion permeability of the medical tubular body transport device 1. Furthermore, the wall thickness of the outer tube 10 is preferably 350 μm or less, more preferably 300 μm or less, and even more preferably 250 μm or less. By setting the upper limit of the wall thickness of the outer tube 10 within the above range, the inner lumen of the outer tube 10 can be enlarged, increasing the variety of diameters of medical tubular bodies 2 that can be accommodated within the inner lumen of the outer tube 10. Therefore, various medical tubular bodies 2 can be transported by the medical tubular body transport device 1.

[0050] A guide wire tube 80 is disposed within the inner cavity of the outer tube 10, allowing the guide wire to be inserted into the inner cavity. Furthermore, the guide wire tube 80 has a lengthwise inner cavity extending along its length, through which the guide wire is inserted. The medical tubular body transport device 1 includes the guide wire tube 80, thereby facilitating the insertion of the guide wire into the medical tubular body transport device 1 and enabling the medical tubular body transport device 1 to be transported into the body along the guide wire. Additionally, by inserting the guide wire into the medical tubular body transport device 1, damage to the medical tubular body transport device 1 by the guide wire can be prevented.

[0051] Materials constituting the guide tube body 80 may include, for example, polyolefin resins such as polyethylene and polypropylene, polyamide resins such as nylon, polyester resins such as PET, aromatic polyetherketone resins such as PEEK, polyether polyamide resins, polyurethane resins, polyimide resins, fluorinated resins such as PTFE, PFA, and ETFE, and synthetic resins such as polyvinyl chloride resins. Among these, polyimide resin is preferred. Using polyimide resin as the material for the guide tube body 80 improves its sliding properties, making it easier to insert the guide wire into the inner cavity of the guide tube body 80 and deliver the medical tubular body delivery device 1 into the body along the guide wire. Furthermore, the guide tube body 80 may have a multi-layered structure with braided layers such as metal braids. This multi-layered structure improves the tensile strength, sliding properties relative to the guide wire, and kink resistance of the guide tube body 80.

[0052] The wall thickness of the guide tube 80 is preferably less than that of the outer tube 10. The guide tube 80 is thinner than the outer tube 10, thereby improving the flexibility of the medical tubular body transport device 1. Therefore, even in curved intracellular lumens, the medical tubular body transport device 1 can be easily inserted.

[0053] The wall thickness of the guide tube body 80 is preferably 99% or less of the wall thickness of the outer tube body 10, more preferably 98% or less, and even more preferably 97% or less. By setting the upper limit of the ratio of the wall thickness of the guide tube body 80 to the wall thickness of the outer tube body 10 within the above range, the flexibility of the guide tube body 80 can be sufficiently improved. Furthermore, the wall thickness of the guide tube body 80 is preferably 50% or more of the wall thickness of the outer tube body 10, more preferably 60% or more, and even more preferably 70% or more. By setting the lower limit of the ratio of the wall thickness of the guide tube body 80 to the wall thickness of the outer tube body 10 in this way, the rigidity of the guide tube body 80 can be improved, forming a medical tubular body transport device 1 with good pushing performance.

[0054] Preferably, the rigidity of the distal side of the guide tube body 80 is higher than that of the proximal side of the guide tube body 80. The higher rigidity of the distal side of the guide tube body 80 compared to the proximal side improves the driving performance of the medical tubular transport device 1.

[0055] To ensure that the rigidity of the distal side of the guide tube body 80 is higher than that of the proximal side, the guide tube body 80 can be formed into a structure having a distal guide tube body and a proximal guide tube body, with the rigidity of the distal guide tube body being higher than that of the proximal guide tube body. Specifically, it is preferable that the proximal guide tube body is a single-layer structure of synthetic resin, and the distal guide tube body is a multi-layer structure with metal braid as an intermediate layer of synthetic resin. Examples of metal braids for the distal guide tube body include stainless steel, carbon steel, and nickel-titanium alloy. The distal guide tube body preferably has stainless steel metal braid. The multi-layer structure of the distal guide tube body allows for sufficiently higher rigidity of the distal guide tube body compared to the proximal guide tube body.

[0056] The material constituting the tubular structure 90 is preferably an elastic resin material, such as polyolefin resins like polyethylene, fluorinated resins like PTFE and PFA, polyamide resins, polyurethane resins, polyester resins, silicone resins, and polyimide resins. Among these, the material constituting the tubular structure 90 preferably includes a polyimide resin. The inclusion of a polyimide resin in the material constituting the tubular structure 90 increases its rigidity. As a result, the tubular structure 90 can adequately support the rear end of the medical tubular body 2, such as the stent, allowing for effective stent deployment.

[0057] The outer diameter of the tubular member 90 is preferably the same as or smaller than the outer diameter of the medical tubular body 2 housed within the inner cavity of the outer tubular body 10, and smaller than the inner diameter of the outer tubular body 10. Because the outer diameter of the tubular member 90 is the same as or smaller than the outer diameter of the medical tubular body 2, and smaller than the inner diameter of the outer tubular body 10, the tubular member 90 does not easily obstruct the movement of the outer tubular body 10 in the longitudinal direction. Furthermore, the tubular member 90 can fully extend the medical tubular body 2.

[0058] Preferably, at the non-joint portion 92, the inner diameter of the tubular member 90 is larger than the outer diameter of the guide wire body 80, and the non-joint portion 92 has a space between the inner surface of the tubular member 90 and the outer surface of the guide wire body 80. Because the inner diameter of the tubular member 90 is larger than the outer diameter of the guide wire body 80 at the non-joint portion 92, and because there is a space between the tubular member 90 and the guide wire body 80, the rigidity of the tubular member 90 is not easily increased, thus preventing the medical tubular transport device 1 from kinking. Furthermore, when the medical tubular transport device 1 bends, the non-joint portion 92 of the tubular member 90 can easily move to the appropriate position within the outer tube 10, and the guide wire body 80 is less likely to deform significantly relative to the outer tube 10. Therefore, the force applied by the surgeon to the outer tube 10 is easily transmitted, thereby facilitating the release of the medical tubular member 2.

[0059] The cross-sectional area of ​​the space between the inner surface of the tubular member 90 and the outer surface of the guide tube body 80 of the non-jointing portion 92 is preferably 0.07 mm². 2 The above, preferably 0.08mm 2 The above is further preferred to be 0.09mm. 2 The above applies. By setting the lower limit of the cross-sectional area of ​​the space having the non-joint portion 92 within the above range, when the medical tubular transport device 1 is in a bent state, the non-joint portion 92 of the tubular object 90 can easily move within the outer tube 10, and the guide tube 80 is not easily deformed relative to the outer tube 10, thereby forming a medical tubular transport device 1 that facilitates the release of the medical tubular object 2.

[0060] Preferably, the joint 91 is located closer to the position side than the proximal end of the outer tube 10. Because the joint 91 is located closer to the position side than the proximal end of the outer tube 10, the joint 91 of the tubular body 90 is less likely to be pressed against the inner surface of the outer tube 10 when the medical tubular transport device 1 is bent. Therefore, the force that pulls the outer tube 10 toward the surgeon's hand can be effectively transmitted.

[0061] Preferably, the length of the non-joint portion 92 is longer than the length of the joint portion 91 in the longitudinal direction. The longer length of the non-joint portion 92 compared to the joint portion 91 makes it less likely that the rigidity of the portion of the guide tube body 80 where the tubular member 90 is disposed on the outer side will be increased, thereby preventing kinking of the medical tubular transport device 1.

[0062] The length of the non-jointing portion 92 in the longitudinal direction is preferably three times or more than the length of the joining portion 91, more preferably four times or more, and even more preferably five times or more. By setting the lower limit of the ratio of the length of the non-jointing portion 92 to the length of the joining portion 91 within the above range, the rigidity of the portion of the guide wire tube 80 in which the tubular member 90 is disposed is not easily increased. In addition, the length of the non-jointing portion 92 in the longitudinal direction is preferably 50 times or less than the length of the joining portion 91, more preferably 40 times or less, and even more preferably 30 times or less. By setting the upper limit of the ratio of the length of the non-jointing portion 92 to the length of the joining portion 91 within the above range, the tubular member 90 is sufficiently fixed to the guide wire tube 80, hindering the movement of the medical tubular member 2 within the outer tube 10, and making it easier for the medical tubular member 2 to be exposed from the outer tube 10.

[0063] Preferably, the thickness of the distal end of the tubular member 90 is greater than the thickness of the proximal end. This greater thickness of the distal end of the tubular member 90, which directly or indirectly contacts the medical tubular body 2, increases the rigidity of the distal end compared to the proximal end, making it easier to impede the movement of the medical tubular body 2 within the outer tubular body 10, thereby facilitating the release of the medical tubular body 2.

[0064] The thickness of the distal end of the tubular member 90 is preferably at least 1.05 times the thickness of the proximal end of the tubular member 90, more preferably at least 1.1 times, and even more preferably at least 1.15 times. By setting the lower limit of the ratio of the thickness of the distal end to the proximal end of the tubular member 90 within the above range, the rigidity of the distal end of the tubular member 90 can be made sufficiently higher than that of the proximal end. In addition, the thickness of the distal end of the tubular member 90 is preferably at least 5 times the thickness of the proximal end of the tubular member 90, more preferably at least 4 times, and even more preferably at least 3 times. By setting the upper limit of the ratio of the thickness of the distal end to the proximal end of the tubular member 90 within the above range, the inner surface of the outer tube 10 and the outer surface of the distal end of the tubular member 90 are less likely to come into contact. Therefore, the force required to pull the outer tube 10 toward the surgeon's hand side can be reduced, thereby enabling the formation of a medical tubular member transport device 1 that facilitates the release of the medical tubular member 2.

[0065] Preferably, the outer diameter of the distal end of the tubular member 90 is larger than the outer diameter of the proximal end of the tubular member 90. The larger outer diameter of the distal end of the tubular member 90 increases the area of ​​direct or indirect contact between the distal end of the tubular member 90 and the medical tubular body 2, making it easier to restrict the position of the medical tubular body 2 within the outer tubular body 10.

[0066] The outer diameter of the distal end of the tubular member 90 is preferably at least 1.05 times that of the proximal end, more preferably at least 1.1 times, and even more preferably at least 1.15 times. By setting the lower limit of the ratio of the outer diameters of the distal end to the proximal end of the tubular member 90 within the above range, the rigidity of the distal end of the tubular member 90 can be made higher than that of the proximal end, making it easier to restrict the position of the medical tubular body 2 within the outer tube body 10. In addition, the outer diameter of the distal end of the tubular member 90 is preferably at least 5 times that of the proximal end, more preferably at least 4 times, and even more preferably at least 3 times. By setting the upper limit of the ratio of the outer diameters of the distal end to the proximal end of the tubular member 90 within the above range, the outer diameter of the tubular member 90 is less likely to become too large relative to the inner diameter of the outer tube body 10, which can reduce the force required to pull the outer tube body 10 towards the surgeon's hand.

[0067] Preferably, the rigidity of the distal end of the tubular member 90 is higher than that of the proximal end. This greater rigidity of the distal end of the tubular member 90, which directly or indirectly contacts the medical tubular body 2, ensures that the rigidity of the distal end is higher than that of the proximal end. Consequently, movement of the medical tubular body 2 within the outer tube 10 is effectively prevented, facilitating the release of the medical tubular body 2. Furthermore, to ensure that the rigidity of the distal end of the tubular member 90 is higher than that of the proximal end, in addition to making the thickness of the distal end of the tubular member 90 greater than the thickness of the proximal end and the outer diameter of the distal end of the tubular member 90 greater than the outer diameter of the proximal end, other methods include making the hardness of the material constituting the distal end of the tubular member 90 greater than that of the material constituting the proximal end, and providing reinforcing material at the distal end of the tubular member 90.

[0068] like Figure 3 As shown, the preferred cylindrical component 100 is disposed inside the outer tube 10 and outside the guide tube 80, and proximal to the medical tubular body 2 and distal to the tubular object 90. The cylindrical component 100 is not engaged with the guide tube 80 or the tubular object 90. The medical tubular transport device 1 has a cylindrical component 100 that is not engaged with the guide tube 80 or the tubular object 90. Therefore, when the medical tubular transport device 1 bends and the guide tube 80 also bends along with the outer tube 10, not only the non-engaged portion 92 of the tubular object 90 but also the cylindrical component 100 can move. This allows for easy and sufficient transmission of the force pulling the outer tube 10 towards the surgeon's hand, and enables stable release of the medical tubular body 2.

[0069] The material constituting the cylindrical component 100 is the same as the material constituting the tubular body 90, preferably an elastic resin material, such as polyolefin resins like polyethylene, fluorinated resins like PTFE and PFA, polyamide resins like nylon, polyurethane resins, polyester resins, silicone resins, etc. Among these, the material constituting the cylindrical component 100 is preferably a polyamide resin, and more preferably nylon. The use of a polyamide resin as the material constituting the cylindrical component 100 increases the rigidity of the cylindrical component 100, facilitating the unfolding of the medical tubular body 2.

[0070] Preferably, the cylindrical component 100 comprises an X-ray-proof material. Because the cylindrical component 100 comprises an X-ray-proof material, its position can be confirmed under X-ray fluoroscopy. Therefore, the position and deployment status of the medical tubular body 2 can be determined under X-ray fluoroscopy.

[0071] Preferably, the distal end of the tubular body 90 contains an X-ray-proof material. The presence of an X-ray-proof material at the distal end of the tubular body 90 allows for confirmation of its position under X-ray fluoroscopy, thereby confirming the position of the medical tubular body 2.

[0072] Examples of X-ray-blocking materials include lead, barium, iodine, tungsten, gold, platinum, iridium, stainless steel, tantalum, titanium, and cobalt-chromium alloys. Platinum is preferred among these. Platinum as the X-ray-blocking material improves imaging performance under X-rays.

[0073] like Figure 3 As shown, an X-ray-blocking marker 6 is preferably disposed closer to the distal end of the cylindrical member 100 and further distal to the distal end of the tubular object 90. The X-ray-blocking marker 6 is disposed between the cylindrical member 100 and the tubular object 90, thereby enabling confirmation of the proximal position of the medical tubular body 2 under X-ray fluoroscopy, and confirming the position and extended state of the medical tubular body 2.

[0074] Preferably, the X-ray opaque marker 6 is not bonded to the outer surface of the cylindrical component 100. Because the X-ray opaque marker 6 is not bonded to the outer surface of the cylindrical component 100, it is less likely that the X-ray opaque marker 6 will follow the bending of the medical tubular transport device 1 and the cylindrical component 100. Therefore, the rigidity of the portion of the guide tube 80 where the cylindrical component 100 is located is less likely to be improved when the X-ray opaque marker 6 is disposed.

[0075] Preferably, an X-ray opaque marker 6 is provided at the non-joining portion 92, and the X-ray opaque marker 6 is not joined to the guide tube body 80. By providing the X-ray opaque marker 6 at the non-joining portion 92, which is not joined to the guide tube body 80, the position and extension status of the proximal side of the medical tubular body 2 can be confirmed under X-ray fluoroscopy, and the rigidity of the guide tube body 80 at the non-joining portion 92 of the tubular body 90 can be prevented from becoming too high.

[0076] Examples of shapes for the X-ray opaque marker 6 include cylindrical, polygonal cylindrical, C-shaped with a slit in the cross-section, and coiled wire. The cylindrical shape is preferred. By constructing the X-ray opaque marker 6 in this way, uniform visibility can be imparted to it along its entire circumference, thereby improving its visibility under X-ray fluoroscopy.

[0077] Furthermore, the X-ray non-transmitting marker 6 is preferably a coil made of wound wire. Since the X-ray non-transmitting marker 6 is a coil made of wound wire, when the medical tubular transport device 1 is bent, the X-ray non-transmitting marker 6 also bends, so that the X-ray non-transmitting marker 6 is less likely to become an obstacle when the outer tube 10 is pulled toward the surgeon's hand side.

[0078] Preferably, the X-ray non-transmissive marker 6 is disposed between the outer surface of the tubular object 90 and the outer surface of the guide wire tube 80. Because the X-ray non-transmissive marker 6 is disposed between the outer surface of the tubular object 90 and the outer surface of the guide wire tube 80, even if the medical tubular transport device 1 is significantly bent, the X-ray non-transmissive marker 6 is unlikely to fall off or shift position, thus allowing for full monitoring of the position and deployment status of the medical tubular object 2 under X-ray fluoroscopy.

[0079] Preferably, the X-ray opaque marker 6 is not attached to the outer surface of the tubular object 90 or the outer surface of the guide wire body 80. Since the X-ray opaque marker 6 is not attached to the outer surface of the tubular object 90 or the guide wire body 80, even if the medical tubular transport device 1 buckles, and the tubular object 90 and the guide wire body 80 buckle, the X-ray opaque marker 6 will not follow their buckling, thus preventing an increase in rigidity at the portion of the guide wire body 80 where the tubular object 90 is located, where the X-ray opaque marker 6 is disposed.

[0080] Preferably, the X-ray-isolating marker 6 is positioned closer to the distal end of the tubular body 90 and further distal to the proximal end of the tubular body 90. This placement of the X-ray-isolating marker 6 allows for easy identification of the position and extension status of the medical tubular body 2 under X-ray fluoroscopy, as a gap exists between the medical tubular body 2 and the X-ray-isolating marker 6.

[0081] Furthermore, the number of X-ray non-transmissive markers 6 can be one or more.

[0082] like Figures 1-3 As shown, the medical tubular body transport device 1 preferably has a distal contact 3 that is more flexible than the outer tubular body 10. Furthermore, the outer diameter of the distal end of the distal contact 3 can be the same as or greater than the outer diameter of the distal end of the outer tubular body 10, but more preferably smaller. By configuring the medical tubular body transport device 1 in this way, damage to the body from the distal end of the medical tubular body transport device 1 can be prevented when it is transported into the body, and the following characteristics of bending, following of the preceding guide wire, and reach to the extremities can be improved, thereby improving operability during transport. In addition, by extending the proximal end of the distal contact 3 closer to the side than the distal end of the outer tubular body 10, the outer tubular body 10 can easily follow the bending distal contact 3, thus becoming a more preferred configuration.

[0083] Examples of materials constituting the terminal contact 3 include polyolefin resins such as polyethylene and polypropylene, polyamide resins such as nylon, polyester resins such as PET, aromatic polyetherketone resins such as PEEK, polyether polyamide resins, polyurethane resins, polyimide resins, fluorinated resins such as PTFE, PFA, and ETFE, and polyvinyl chloride resins. Among these, a polyamide resin is preferred, and a polyamide elastomer is more preferably used. By constituting the terminal contact 3 in this way, a medical tubular transport device 1 can be formed that combines the tracking ability of the terminal contact 3 to the guide wire with the safety of the end.

[0084] like Figure 1 As shown, the medical tubular transport device 1 may have a controller 4 on the proximal side. Preferably, by operating the controller 4, the outer tubular body 10 can be moved in the length direction. The medical tubular transport device 1 has a controller 4 that moves the outer tubular body 10 in the length direction, thereby facilitating the movement of the outer tubular body 10 in the length direction and facilitating the release of the medical tubular body 2.

[0085] As described above, the medical tubular body transport device of the present invention is a device for transporting a medical tubular body into the body. It is characterized by comprising: an outer tubular body for housing the medical tubular body within its inner cavity; a guide wire tubular body disposed within the inner cavity of the outer tubular body for insertion of a guide wire into the inner cavity; and a tubular object disposed on the inner side of the outer tubular body and the outer side of the guide wire tubular body, and proximal to the medical tubular body. The tubular object has a joint portion where the tubular object and the guide wire tubular body engage, and a non-joint portion where the tubular object and the guide wire tubular body do not engage, the non-joint portion being located distal to the joint portion. With this structure, the medical tubular body transport device is less prone to rigid step differences at the portion of the tubular object abutting the proximal end of the medical tubular body. Furthermore, the guide wire tubular body is less prone to deformation relative to the outer tubular body. Therefore, the medical tubular body transport device is less prone to kinking, enabling stable placement of the medical tubular body.

[0086] This application claims the benefit of priority based on Japanese Patent Application No. 2020-158216, filed on September 23, 2020. The entire description of Japanese Patent Application No. 2020-158216, filed on September 23, 2020, is incorporated herein by reference.

[0087] Explanation of reference numerals in the attached figures

[0088] 1...Medical tubular transport device; 2...Medical tubular body; 3...Terminal contact; 4...Controller; 6...X-ray non-transmissive marker; 10...Outer tubular body; 11...Reinforcing member; 80...Guide wire tubular body; 90...Tube; 91...Joint; 92...Non-joint; 100...Cylindrical component.

Claims

1. A medical tubular body delivery device, characterized in that, have: The outer tube is for the medical tubular body to be placed within the inner cavity; A guide wire tube, disposed within the inner cavity of the outer tube, for inserting the guide wire into the inner cavity; and A tubular object is disposed on the inner side of the outer tube body and the outer side of the guide wire tube body, and on the proximal side of the medical tubular object. The tubular object has a joint portion where the tubular object and the guide wire body are joined, and a non-joint portion where the tubular object and the guide wire body are not joined. At the non-jointed portion, the inner diameter of the tubular object is larger than the outer diameter of the guide wire tube. The non-jointed portion has a space between the inner surface of the tubular structure and the outer surface of the guide wire tube. The non-jointing portion is located on a more distal side than the joining portion. Therefore, a rigid step difference is less likely to occur in the portion of the tubular material that abuts against the proximal end of the medical tubular body. The joint is located closer to the position side than the proximal end of the outer tube. The cylindrical component is disposed on the inner side of the outer tube and the outer side of the guide wire tube, and is disposed closer to the position than the medical tubular body and farther from the position of the tubular object. The cylindrical component is not connected to the guide wire tube body or the tubular object. When the medical tubular transport device is bent, and the guide tube also bends along with the outer tube, not only the non-jointed portion of the tubular object but also the cylindrical component can move.

2. The medical tubular body transport device according to claim 1, wherein, The length of the non-jointed portion is longer than the length of the joined portion in the longitudinal direction.

3. The medical tubular body delivery device according to claim 1 or 2, wherein, The cylindrical component contains an X-ray-non-transmissive material.

4. The medical tubular body delivery device according to claim 1 or 2, wherein, An X-ray non-transmissive marker is disposed closer to the distal end of the cylindrical component and further distal to the distal end of the tubular component.

5. The medical tubular body delivery device according to claim 1 or 2, wherein, The distal end of the tubular structure contains an X-ray-non-transmissive material.

6. The medical tubular body delivery device according to claim 1 or 2, wherein, An X-ray-blocking marker is provided at the non-jointing portion. The X-ray non-transmissive marker is not attached to the guide tube body.

7. The medical tubular body transport device according to claim 6, wherein, The X-ray non-transmissive marker is a coil made by winding wire.

8. The medical tubular body delivery device according to claim 6, wherein, The X-ray non-transmissive marker is disposed between the outer surface of the tubular object and the outer surface of the guide wire body.

9. The medical tubular body delivery device according to claim 8, wherein, The X-ray non-transmissive marker is not attached to the outer surface of the tubular object or the outer surface of the guide wire tube.

10. The medical tubular body transport device according to claim 6, wherein, The X-ray non-transmissive marker is positioned closer to the distal end of the tubular structure and further to the proximal end of the tubular structure.

11. The medical tubular body delivery device according to claim 1 or 2, wherein, The thickness of the distal end of the tubular structure is greater than the thickness of the proximal end of the tubular structure.

12. The medical tubular body delivery device according to claim 1 or 2, wherein, The outer diameter of the distal end of the tubular structure is larger than the outer diameter of the proximal end of the tubular structure.

13. The medical tubular body delivery device according to claim 1 or 2, wherein, The distal end of the tubular structure is more rigid than the proximal end of the tubular structure.

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