Medical tubular transport device

Abstract

This medical tubular body conveyance device is characterized by including an accommodation member (2) in which a medical tubular body is arranged in an inner lumen on the tip side, an inner tube arranged in an inner lumen in the medical tubular body, and a handle for moving the accommodation member (2) toward the proximal side with respect to the inner tube. The medical tubular conveyance device is also characterized in that the handle comprises a base for holding the inner tube (1) and accommodating the accommodation member (2), a moving body (5) capable of movement in the lengthwise direction of the accommodation member (2), and a drive section whereby the moving body (5) is made to move, the moving body (5) comprises a holding section (8) provided with an insertion passage (8A) through which the accommodation member (2) can be rotatably inserted, the accommodation member (2) comprises a forward movement-preventing section (9) closer to the proximal side than the insertion passage (8A), and movement of the accommodation member (2) and the moving body (5) by the drive section is enabled as a result of the forward movement-preventing section (9) and the holding section (8) being brought into contact with each other.

Description

Technical Field

[0001] The present invention relates to a medical tubular body conveying device for conveying a medical tubular body such as a stent into the body.

Background Art

[0002] Medical tubular bodies represented by stents are medical devices for treating various diseases caused by stenosis or occlusion of biological lumens such as digestive tracts such as bile ducts and pancreatic ducts, and blood vessels such as the iliac artery. Among medical tubular bodies, there are those that are placed in the lesion part from the inside to expand the lesion part such as a stenosis or occlusion site and maintain the inner diameter of the lumen, or those that entangle and remove thrombus or the like generated in the lesion part or around it and restore the inner diameter of the lumen in the lesion part.

[0003] As an example of treatment with a medical tubular body using an endoscope, a method of placing a medical tubular body in the biliary tract will be described below in order to perform drainage of bile from the biliary tract to the duodenal side in the biliary tract occluded by bile duct cancer. First, an endoscope is inserted from the mouth to the entrance (papilla) of the bile duct in the duodenum. Next, a guide wire is conveyed to the lesion part through the endoscope. Further, a medical tubular body conveying device is conveyed to the lesion part along the guide wire. Then, the medical tubular body conveying device is operated to place the medical tubular body in the lesion part.

[0004] As a medical tubular body conveying device, for example, Patent Document 1 discloses a stent conveying system having a first tube member having a distal end for receiving a stent, a second tube member slidable longitudinally on the first tube member, a third tube member disposed on at least a part of the second tube member and rotatable with respect to the first tube member and the second tube member, and a handle main body portion connected to the second tube member and configured to retract the second tube member with respect to the first tube member.

Prior Art Documents

Patent Documents

[0005] [Patent Document 1] Special Publication No. 2009-523490 [Overview of the Initiative] [Problems that the invention aims to solve]

[0006] Medical tubular transport devices require the transport of medical tubular objects, such as stents, through long, winding tubular bodies within the body to the lesion site. Therefore, significant twisting frequently occurs in the medical tubular transport device during transport. When such twisting occurs, it is necessary to untwist the device by turning an operating handle located on the user's side for placing the medical tubular object at the lesion site. However, this is inconvenient for the operator of the medical tubular transport device, and there is also a risk that the medical tubular object may be mistakenly placed in a part of the tubular body that is not the lesion site during such non-treatment-related operations.

[0007] In the stent transport system disclosed in Patent Document 1, a stent, which is a tubular medical body, is placed between a first tubular member and a second tubular member and transported to the lesion. After transporting to the lesion, the handle body is operated to retract the second tubular member relative to the first tubular member, thereby exposing the stent from the second tubular member, and the stent is deployed and placed at the lesion. Furthermore, by providing a third tubular member that is rotatable relative to the first and second tubular members, the stent transport system can mitigate the compressive force generated by twisting the third tubular member when it is in a curved lumen within the body.

[0008] However, the third pipe member is only rotatable relative to the first and second pipe members, and the first and second pipe members, which transport the stent, are connected to the handle body. Therefore, if the first and second pipe members twist, twisting the third pipe member cannot resolve the twist in the first and second pipe members, and the operation of rotating the handle body is still necessary.

[0009] The present invention has been made in view of the above circumstances, and its first objective is to provide a medical tubular body transport device that eliminates the need for an operator to perform operations unrelated to treatment, such as turning an operating handle, in order to eliminate the large twisting that occurs in the medical tubular body transport device during transport. Furthermore, the second objective of the present invention is to prevent the forward movement of a medical tubular body storage member (movement toward the catheter tip side) when a medical tubular body storage member such as a stent is attached to the operating handle in a rotatable manner, thereby preventing the storage member from colliding with the tip of the inner tube and preventing a decrease in the accuracy of the placement of the medical tubular body such as a stent. [Means for solving the problem]

[0010] The medical tubular body transport device that has solved the above problem is a device for transporting a medical tubular body into the body, and comprises a storage member in which the medical tubular body is placed in the lumen at the tip end, an inner tube placed in the lumen of the medical tubular body, and an operating handle for moving the storage member proximal to the inner tube, wherein the operating handle comprises a base that holds the inner tube and houses the storage member, a movable body that can move in the longitudinal direction of the storage member, and a drive unit that moves the movable body, wherein the movable body has a holding part provided with an insertion hole through which the storage member can be rotatably inserted, and the storage member has a forward-preventing part proximal to the insertion hole, and the forward-preventing part and the holding part come into contact, thereby enabling the movement of the movable body and the storage member by the drive unit.

[0011] In the medical tubular body transport device of the present invention, it is preferable that the forward-preventing part is positioned in contact with the holding part.

[0012] The medical tubular transport device of the present invention preferably includes a retraction prevention part in which the storage member is positioned so as to be able to contact the holding part on the distal side of the insertion hole.

[0013] The medical tubular transport device of the present invention preferably comprises a protective tube in which a storage member includes an outer tube in which a medical tubular body is disposed within its lumen, a traction member connected to the outer tube, and the proximal end of the outer tube, the portion of the inner tube extending proximal to the proximal end of the outer tube, and the traction member are disposed within its lumen, and a guide wire port for passing a guide wire through the lumen of the inner tube is provided.

[0014] The medical tubular transport device of the present invention preferably includes a protective member that abuts against the tip of the anti-retraction section and is positioned on the traction member.

[0015] In the medical tubular transport device of the present invention, it is preferable that the protective member is attached to the base.

[0016] In the medical tubular transport device of the present invention, it is preferable that the protective member is attached to the protective tube.

[0017] In the medical tubular transport device of the present invention, it is preferable that the protective tube is rotatably attached to the base with respect to the operating handle.

[0018] In the medical tubular transport device of the present invention, it is preferable that the inner tube is rotatably attached to the base with respect to the operating handle.

[0019] Furthermore, the medical tubular body transport device that has solved the above problems is a device for transporting a medical tubular body into the body, and comprises a storage member in which the medical tubular body is placed in the lumen at the tip end, an inner tube placed in the lumen of the medical tubular body, and an operating handle for moving the storage member proximal to the inner tube, wherein the operating handle comprises a base that holds the inner tube and houses the storage member, a movable body that can move in the longitudinal direction of the storage member, and a drive unit that moves the movable body, wherein the movable body has a holding part provided with an insertion hole through which the storage member can be rotatably inserted, and the storage member has a forward-preventing part proximal to the insertion hole, and the forward-preventing part and the holding part come into contact, thereby enabling the movement of the movable body and the storage member by the drive unit.

[0020] Furthermore, the medical tubular body transport device that has solved the above problems is a device for transporting a medical tubular body into the body, comprising: a storage member in which the medical tubular body is placed in a lumen; an inner tube placed in the lumen of the medical tubular body; and a handle for moving the storage member proximal to the inner tube, wherein the handle comprises a base for housing the storage member and a movable body that is movable in the longitudinal direction of the storage member, the movable body having an insertion passage through which the storage member is rotatably inserted, and a forward-preventing part is disposed on the storage member, with at least a part of the forward-preventing part in contact with the movable body.

[0021] In the medical tubular transport device of the present invention, it is preferable that the handle holds the inner tube.

[0022] In the medical tubular transport device of the present invention, it is preferable that the distal end of the forward-preventing part is in contact with the proximal end of the moving body.

[0023] In the medical tubular transport device of the present invention, it is also preferable that the distal end of the forward-preventing unit be located distal to the proximal end of the moving body.

[0024] In the medical tubular body conveying device of the present invention, it is preferable that the distal end of the forward prevention portion is on the distal side of the proximal end of the insertion passage, and the proximal end of the forward prevention portion is on the proximal side of the distal end of the insertion passage.

[0025] In the medical tubular body conveying device of the present invention, it is preferable that the moving body has a holding portion and the insertion passage is formed in the holding portion.

[0026] In the medical tubular body conveying device of the present invention, it is preferable that the forward prevention portion is arranged to abut against the holding portion.

[0027] In the medical tubular body conveying device of the present invention, it is preferable that the distal end of the forward prevention portion abuts against the proximal end of the holding portion.

[0028] In the medical tubular body conveying device of the present invention, it is also preferable that the distal end of the forward prevention portion can be located on the distal side of the proximal end of the holding portion.

[0029] In the medical tubular body conveying device of the present invention, the storage member has a backward prevention portion on the distal side of the forward prevention portion, and it is preferable that at least a part of the backward prevention portion abuts against the moving body.

[0030] In the medical tubular body conveying device of the present invention, it is preferable that the proximal end of the backward prevention portion abuts against the distal end of the moving body. <​​​​​​​​​​​​ In the medical tubular transport device of the present invention, it is preferable that the proximal end of the retraction prevention part is in contact with the distal end of the holding part.

[0035] In the medical tubular transport device of the present invention, it is also preferable that the proximal end of the retraction prevention part be located proximal to the distal end of the holding part.

[0036] In the medical tubular body transport device of the present invention, the storage member comprises an outer tube in which a medical tubular body is disposed within its lumen, and a traction member connected to the outer tube. Preferably, the outer tube has a protective tube in which the proximal end and the traction member are disposed within its lumen, and the protective tube has a guide wire port through which a guide wire is inserted and which communicates with the inner tube.

[0037] In the medical tubular body transport device of the present invention, a protective member is provided on the traction member, and it is preferable that the protective member abuts against the retraction prevention portion.

[0038] In the medical tubular transport device of the present invention, it is preferable that the protective member is fixed to the base.

[0039] In the medical tubular transport device of the present invention, it is preferable that the protective member is fixed to the protective tube.

[0040] In the medical tubular transport device of the present invention, it is preferable that the protective tube is fixed to the base and rotatable relative to the handle.

[0041] In the medical tubular transport device of the present invention, it is preferable that the inner tube is fixed to the base and rotatable relative to the handle. [Effects of the Invention]

[0042] According to the medical tubular body transport device of the present invention, since the storage member for medical tubular bodies such as stents is rotatable relative to the handle, the large twisting that occurred in conventional medical tubular body transport devices during transport of medical tubular bodies is eliminated. Furthermore, since the storage member is prevented from advancing axially, it is possible to prevent the storage member and the tip from colliding and damaging each other, and it is also possible to prevent a decrease in the accuracy of medical tubular body placement due to a misalignment of the positional relationship between the tip of the storage member and the medical tubular body. [Brief explanation of the drawing]

[0043] [Figure 1] This is an overall perspective view showing a medical tubular body transport device according to an embodiment of the present invention. [Figure 2] This is an enlarged perspective view of the main part showing the configuration of the tip of a delivery catheter according to an embodiment of the present invention. [Figure 3] Figure 1 is a plan view of the portion of the medical tubular transport device where the outer tube, inner tube, and protective tube are located. [Figure 4] This is an exploded perspective view of a handle according to an embodiment of the present invention. [Figure 5] This is an enlarged cross-sectional view of the portion of the handle containing the movable body, traction member, and holding part according to an embodiment of the present invention. [Modes for carrying out the invention]

[0044] The present invention will be described in more detail below based on the embodiments described below. However, the present invention is not limited by the embodiments described below, and it is certainly possible to implement it with appropriate modifications within the scope that is consistent with the spirit of the preceding and following descriptions, and all such modifications are included within the technical scope of the present invention. In addition, hatching and component reference numerals may be omitted in the drawings for convenience, in which case please refer to the specification or other drawings. Furthermore, the dimensions of various components in the drawings may differ from the actual dimensions, as priority has been given to helping to understand the features of the present invention.

[0045] As shown in the perspective view of Figure 1, the medical tubular body transport device SDS (hereinafter also referred to as the stent delivery system) according to an embodiment of the present invention has a delivery catheter D composed of a coaxial inner tube 1 and a storage member 2 for a medical tubular body ST such as a stent, a medical tubular body ST (hereinafter also referred to as a stent) held at the tip of the delivery catheter D, and an operating handle H (hereinafter also referred to as a handle) for holding the delivery catheter D.

[0046] In this invention, the proximal side refers to the direction toward the user or operator's proximal side with respect to the extending direction of the stent delivery system SDS or the longitudinal axis direction of the delivery catheter D, while the distal side refers to the opposite direction of the proximal side, i.e., the direction toward the patient to whom the stent ST is placed. Furthermore, in each component, the end on the proximal side is called the proximal end, and the area near the proximal end is called the proximal end, while the end on the distal side is called the distal end, and the area near the distal end is called the distal end.

[0047] Here, the stent ST is a self-expanding tubular body made of, for example, a superelastic alloy such as nickel-titanium alloy, and has a mesh-like structure. As shown in the enlarged perspective view of the main part in Figure 2(a), the stent ST is held at the tip of the delivery catheter D in a reduced diameter state. The tip F in the enlarged perspective view of the main part in Figure 2 is formed in a tapered shape using a flexible material to prevent damage to the walls of in vivo tubular structures such as the digestive tract and blood vessels when delivering the delivery catheter D to the affected area (lesion).

[0048] As shown in Figure 2(a), the stent ST in its reduced diameter state is restricted from proximal movement by a pusher member P fixed to the inner tube 1. Therefore, with the stent ST delivered to the affected area, when the operator operates the handle H and moves the housing member 2 proximal to the inner tube 1 as shown in Figure 2(b) (see arrow in Figure 2(a)), the stent ST is released from the delivery catheter D and expands radially. Figure 1 shows a delivery catheter D, which is an example of a catheter, and a handle H attached to this delivery catheter D. The system including the handle H and the delivery catheter D attached to the handle H is called the stent delivery system SDS.

[0049] The handle H moves the storage member 2 proximal to the inner tube 1. It is preferable that the handle H holds the inner tube 1.

[0050] The storage member 2 has the medical tubular body ST positioned in its tip-side lumen. In other words, the stent ST is positioned in the distal end lumen of the storage member 2.

[0051] The storage member 2 preferably comprises an outer tube 15 in which a medical tubular body ST is placed in its lumen, and a traction member 13 connected to the outer tube 15. Alternatively, as shown in Figure 3, the storage member 2 may consist of an outer tube 15 which is the part that houses the stent ST, and a traction member 13 fixed to the proximal side of the outer tube 15. Furthermore, the storage member 2 may also include a protective tube 14 that covers part of the outer tube 15 and the traction member 13. Preferably, the protective tube 14 is positioned so that the proximal end of the outer tube 15 and the traction member 13 are in the lumen.

[0052] Preferably, a tip F is provided at the distal end of the inner tube 1. Preferably, the tip F has a lumen, and this lumen is in communication with the lumen of the inner tube 1. By having the tip F constitute the distal end of the delivery catheter D, it is possible to prevent the tip of the delivery catheter D from damaging the in vivo lumen when the delivery catheter D is inserted into the forceps channel of the endoscope and the stent ST is delivered to the lesion. In addition, having the tip F at the distal end of the delivery catheter D improves the ability of the delivery catheter D to follow the preceding guidewire or forceps channel, and improves the delivery of the tip of the delivery catheter D to the lesion, thereby improving the operability of the stent delivery system SDS.

[0053] Figure 3(a) is a partial plan view of the stent delivery system SDS shown in Figure 1, and, similar to Figure 2(a), shows a plan view of the stent ST housed within the delivery catheter D. Figure 3(b) shows a plan view of the stent delivery system SDS shown in Figure 1, with the outer tube 15 moved proximal, exposing the stent ST from the stent delivery system SDS and expanding radially.

[0054] The outer tube 15 is located distal to the housing member 2, and the stent ST is positioned within the lumen of the outer tube 15. The outer tube 15 is formed to be movable distally to the inner tube 1 and protective tube 14. Figure 3(a) shows the outer tube 15 in its most distal position, and Figure 3(b) shows the outer tube 15 in its most proximal position. When transporting the stent ST to the lesion, the outer tube 15 protects the stent ST from being exposed to the outside of the housing member 2, as shown in Figure 3(a). Furthermore, the outer tube 15 functions to hold the stent ST in a reduced diameter state during transport, thereby facilitating the transport of the stent ST to the lesion. The distal length of the outer tube 15 can be appropriately set according to the distal length of the stent ST placed in the lumen, for example, it can be approximately 50 mm to 800 mm. The range in which the outer tube 15 can move in the distal direction can be appropriately set according to the distal length of the stent ST placed in the lumen of the outer tube 15, and is preferably longer than the distal length of the stent ST. The outer diameter of the outer tube 15 should be, for example, about 0.5 mm to 3.5 mm. Note that the distal direction can be rephrased as the longitudinal axis direction or longitudinal direction.

[0055] A typical example of a medical tubular device (ST) is a stent. By using a stent, various diseases caused by narrowing or obstruction of internal tubules such as the bile ducts, digestive tract, and blood vessels can be treated. Medical tubular devices (STs) include coils formed from a single linear metal or polymer material, tubes made of metal or polymer material cut with a laser, assembled by welding linear components, and those formed by weaving multiple linear metals. In addition to stents, other medical tubular devices (STs) that can be used include stent grafts, occlusion devices, injection catheters, and prosthetic valves.

[0056] Medical tubular bodies (STs) can be classified from the viewpoint of their expansion mechanism into two types: (i) balloon-expandable types in which the medical tubular body is mounted on the surface of a balloon and transported to the lesion, where it is expanded by the balloon; and (ii) self-expandable types in which the medical tubular body is transported to the lesion while its expansion is suppressed, and where the member that suppresses expansion is removed, allowing the medical tubular body to expand on its own. The stent delivery system (SDS) is suitably used to transport self-expandable medical tubular bodies, and the outer tube 15 functions as a member that suppresses the expansion of the stent ST. Therefore, when the stent ST is installed in the lumen of the outer tube 15, it shrinks radially and stretches in the longitudinal direction, resulting in a reduced diameter state that is a more elongated cylindrical shape than the expanded state. Since self-expandable medical tubular bodies do not require a balloon to be installed inside the medical tubular body, the diameter in the reduced diameter state can be made smaller compared to balloon-expandable medical tubular bodies.

[0057] The inner tube 1 is positioned within the lumen of the medical tubular body ST. In other words, the inner tube 1 is positioned within the lumen of both the housing member 2 and the stent ST.

[0058] The inner tube 1 is positioned within the lumen of the outer tube 15 and the lumen of the stent ST, extending proximal to the proximal end of the outer tube 15. When the stent ST is delivered into the body by the stent delivery system SDS, the stent ST is positioned radially between the inner tube 1 and the outer tube 15. A guidewire is inserted into the lumen of the inner tube 1. By inserting the guidewire into the lumen of the inner tube 1 and moving the delivery catheter D along the guidewire, the tip of the delivery catheter D can be delivered to the lesion. The distal length of the inner tube 1 should be, for example, about 800 mm to 3000 mm. The outer diameter of the inner tube 1 should be, for example, about 0.3 mm to 3.0 mm.

[0059] The proximal end of the tip F is preferably located proximal to the distal end of the outer tube 15 when the outer tube 15 is in its most distal position. In other words, the proximal end of the tip F is preferably located within the lumen of the distal end of the outer tube 15. When the delivery catheter D is inserted into the forceps channel of the endoscope and the stent ST is delivered to the lesion, the outer tube 15 can more easily follow the bending movement of the tip F, thereby improving the operability of the delivery catheter D when delivering the stent ST to the lesion.

[0060] Preferably, a protective tube 14 is provided proximal to the outer tube 15, with the proximal end of the outer tube 15 positioned within its lumen. The proximal end of the outer tube 15 and the inner tube 1 are positioned within the lumen of the protective tube 14, and the protective tube 14 extends proximal to the outer tube 15. A handle H for the user to operate the stent delivery system SDS is provided proximal to the protective tube 14. The distal length of the protective tube 14 may be, for example, about 500 mm to 2200 mm. The outer diameter of the protective tube 14 may be, for example, about 0.5 mm to 3.5 mm.

[0061] The proximal end of the outer tube 15 is preferably positioned within the lumen of the protective tube 14 when the outer tube 15 is in its most proximal and most distal position. The distal length of the proximal end of the outer tube 15 positioned within the lumen of the protective tube 14 may be, for example, 1 mm to 50 mm when the outer tube 15 is in its most distal position. At least a portion of the inner tube 1 extending proximal to the proximal end of the outer tube 15 is positioned within the lumen of the protective tube 14, and the distal portion, specifically the portion overlapping with the proximal end of the outer tube 15 positioned within the lumen of the protective tube 14, is also positioned within the lumen of the protective tube 14.

[0062] The protective tube 14 is preferably provided with a guidewire port 12 for passing a guidewire through the lumen of the inner tube 1. In other words, the protective tube 14 preferably has a guidewire port 12 through which a guidewire is inserted and which communicates with the inner tube 1. The guidewire port 12 is provided as an opening inside the delivery catheter D for passing the guidewire. When the stent ST is delivered to the lesion site by the stent delivery system SDS, the guidewire is usually inserted into the lumen of the inner tube 1 with the distal end (tip F) of the inner tube 1 as the entrance and the guidewire port 12 as the exit. In this case, the guidewire port 12 is an opening for bringing the guidewire out from the lumen of the inner tube 1 to the outside of the stent delivery system SDS.

[0063] The position of the guidewire port 12 in the distal and distal directions can be appropriately set according to the type of stent delivery system (SDS), i.e., whether it is a rapid exchange type or an over-the-wire type. Figure 3 shows an example configuration of a rapid exchange type medical tubular transport device in which the guidewire is inserted from the distal end to partway to the proximal end of the shaft. However, the present invention can also be applied to an over-the-wire type medical tubular transport device in which the guidewire is inserted from the distal end to the proximal end of the shaft. Preferably, the guidewire port 12 is located proximal to the proximal end of the outer tube 15 when the outer tube 15 is in its most proximal position.

[0064] Preferably, a traction member 13 is connected to the proximal end of the outer tube 15. The traction member 13 extends proximal to the proximal end of the outer tube 15, is positioned within the lumen of the protective tube 14, and is connected directly to the handle H or via another member. By operating the handle H, the traction member 13 and the outer tube 15 can be moved in the distal direction. For example, by pulling the traction member 13 proximal from the state shown in Figure 3(a) and moving the outer tube 15 proximal to the inner tube 1 and protective tube 14, the stent ST can be exposed outside the delivery catheter D as shown in Figure 3(b), and the stent ST can be placed in the body. Alternatively, while the stent ST is being exposed from the delivery catheter D, the traction member 13 can be moved distally, moving the outer tube 15 distal to the inner tube 1 and protective tube 14, and the stent ST can be re-placed within the lumen of the outer tube 15 to adjust the placement of the stent ST. Furthermore, pulling the traction member 13 towards the proximal side does not cause the inner tube 1 and protective tube 14 to move towards the proximal side.

[0065] At the proximal end of the outer tube 15, the traction member 13 may be connected to the inner surface of the outer tube 15, to the outer surface of the outer tube 15, or to the peripheral wall between the inner and outer surfaces of the outer tube 15. Alternatively, the proximal end of the outer tube 15 may have a multilayer structure, with the distal end of the traction member 13 positioned between the layers, and the traction member 13 connected to the outer tube 15. The means for joining the traction member 13 to the outer tube 15 can be known joining methods such as adhesive bonding, welding, fitting, or interlayer compression of the multilayer structure of the outer tube 15.

[0066] The traction member 13 may be provided as a single unit or as a group. If there are multiple traction members 13, it is preferable that they be provided at different positions in the circumferential direction of the outer tube 15. However, from the viewpoint of making the outer diameter of the protective tube 14 smaller, it is preferable that only one traction member 13 is provided.

[0067] The stent delivery system SDS, with its delivery catheter D configured as described above, facilitates the precise placement of the stent ST in the desired position within the in vivo lumen by pulling the outer tube 15 proximal to the inner tube 1 and protective tube 14. Specifically, when the outer tube 15 is moved proximal, it can be housed within the lumen of the protective tube 14. This reduces frictional resistance caused by the outer tube 15 contacting the endoscope's forceps channel or forceps port when moving the outer tube 15 in the distal direction. As a result, the operating load when moving the outer tube 15 in the distal direction is reduced, allowing for stable deployment of the stent ST. Furthermore, when deploying the stent ST, by fixing the protective tube 14 and pulling only the outer tube 15 proximal via the traction member 13, the movement of the entire delivery catheter D proximal can be suppressed, allowing for precise placement of the stent ST in the desired position.

[0068] When inserting the delivery catheter D into the body through the forceps channel of the endoscope in the stent delivery system SDS configured as described above, it is desirable to remove the air present in the space between the outer tube 15 and the inner tube 1, and the space between the protective tube 14 and the inner tube 1, and replace it with water or saline solution. By removing the air present in the space between the outer tube 15 and the inner tube 1, and the space between the protective tube 14 and the inner tube 1, the frictional resistance between the outer tube 15 and the inner tube 1, and between the outer tube 15 and the protective tube 14 is reduced when moving the outer tube 15 in the near and far directions, thereby further reducing the operating load on the outer tube 15. In addition, if the stent delivery system SDS is used to deliver a stent ST into a blood vessel, removing the air inside the delivery catheter D can prevent air from entering the blood vessel when moving the outer tube 15 in the near and far directions.

[0069] Furthermore, when using a fluid such as ethylene oxide gas as the sterilization medium for the stent delivery system SDS, forming a vent in the protective tube 14 facilitates the penetration and discharge of the sterilization medium into the delivery catheter D, thereby improving sterilization efficiency and enhancing safety and production efficiency.

[0070] Figure 4 shows a perspective view of a handle H according to an embodiment of the present invention, exploded in the longitudinal direction. The handle H comprises a base I for housing a storage member 2 and a movable body 5 that is movable in the longitudinal direction of the storage member 2. The movable body 5 may be configured as a slide mechanism that moves the storage member 2 in the longitudinal direction relative to the inner tube 1. Preferably, the slide mechanism comprises a slide body which is a movable body 5 that is movable in the longitudinal direction of the storage member 2 and a drive unit 6 for moving the slide body. When the storage member 2 is held by the slide body, the drive unit 6 moves the slide body in the longitudinal direction, and the storage member 2 can be moved relative to the inner tube 1.

[0071] The drive unit 6 is not particularly limited as long as it can move the movable body 5 (slide body) in the longitudinal direction. As an example, Figure 4 shows a drive unit 6 using a rack and pinion mechanism and a thumbwheel 3. The thumbwheel 3 has a gear portion 3A, a rotating body 4 (pinion) has teeth that mesh with the gear portion 3A, and the slide body has rack teeth 5A that mesh with the teeth 4A of the rotating body 4. With this configuration, when the operator rotates the thumbwheel 3, the gear portion 3A of the thumbwheel 3 rotates the rotating body 4, the rack teeth 5A of the slide body that mesh with the teeth 4A of the rotating body 4 move, and the slide body and the storage member 2 can be retracted.

[0072] Furthermore, by providing the drive unit 6 with a pull handle (not shown) on the movable body 5 (slide body) and an opening rail (not shown) on the base body I, the operator can grasp the pull handle and pull it proximally to retract the slide body.

[0073] The mobile body 5 has an insertion passage 8A through which the storage member 2 is rotatably inserted. The insertion passage 8A can be any configuration that allows the storage member 2 to be rotatably inserted, such as a hole or groove. Because the mobile body 5 has an insertion passage 8A through which the storage member 2 is rotatably inserted, the storage member 2 can rotate within the insertion passage 8A relative to the mobile body 5 and the handle H. Therefore, even if twisting occurs in the medical tubular body transport device SDS during the transport of the medical tubular body ST by the medical tubular body transport device SDS, the operator does not need to turn the handle H to correct the twist. As a result, the operator does not need to perform the operation of turning the handle H, which is unrelated to treatment.

[0074] The storage member 2 has a forward-moving prevention unit 9 positioned on it, and at least a portion of the forward-moving prevention unit 9 is in contact with the movable body 5. When a user of the stent delivery system SDS moves the movable body 5 in the longitudinal direction, the movable body 5 comes into contact with at least a portion of the forward-moving prevention unit 9. The contact between the movable body 5 and at least a portion of the forward-moving prevention unit 9 allows the storage member 2 to be moved proximal. Since the storage member 2 is rotatably inserted into the movable body 5 by the insertion passage 8A, there is a risk that the storage member 2 may move distally, but the contact between at least a portion of the forward-moving prevention unit 9 and the movable body 5 prevents the storage member 2 from moving distally.

[0075] Figure 5 is a schematic cross-sectional view showing an enlarged view of the area around the holding part 8 in Figure 4. As shown in Figure 5(a), the holding part 8 is provided on the movable body 5 (slide body). The holding part 8 has an insertion passage 8A, through which the storage member 2 is inserted. The insertion passage 8A is a hole through which the storage member 2 can be inserted. In other words, the movable body 5 is equipped with a holding part 8 that has an insertion hole through which the storage member 2 can be rotatably inserted. The shape of the insertion hole is not limited and may be circular or U-shaped. Since the storage member 2 is not fixed to the holding part 8, it is rotatable within the insertion hole 8A relative to the slide body and the handle H. As a result, even if twisting occurs in the medical tubular body transport device SDS during the transport of the medical tubular body ST by the medical tubular body transport device SDS, the operator does not need to turn the handle H to correct the twist. Therefore, this has the effect of eliminating the need for the operator to perform an operation unrelated to treatment, such as turning the handle H.

[0076] As shown in Figure 5(a), the storage member 2 is equipped with a forward-preventing part 9 proximal to the insertion passage 8A (insertion hole), and the holding part 8 holds the storage member 2 via the forward-preventing part 9. When the moving body 5 (slide body) is moved longitudinally by operating the drive unit 6 (slide means), the slide body comes into contact with the forward-preventing part 9 held by the storage member 2, thereby moving the storage member 2 proximal. At this time, the storage member 2 is rotatable within the insertion passage 8A relative to the slide body and the handle H. Therefore, even if twisting occurs in the medical tubular body transport device SDS, the operator does not need to turn the handle H to correct the twist, and the stent ST can be placed. Furthermore, since the storage member 2 is not fixed to the holding part 8 within the insertion passage 8A, there is a possibility that the storage member 2 may move distally, but the forward-preventing part 9 comes into contact with the proximal end of the holding part 8, preventing the storage member 2 from moving distally. This prevents the tip of the storage member 2 from colliding with the tip tip F.

[0077] In this case, if the storage member 2 consists of an outer tube 15 and a traction member 13 connected to the outer tube 15, it is preferable to use, for example, a highly rigid metal wire as the traction member 13. By using a metal wire for the traction member 13, the rigidity of the delivery catheter D can be increased, and the pushability of the medical tubular transport device SDS can be improved. Furthermore, if the traction member 13 is a metal wire, the traction member 13 itself can be made thinner compared to when the entire length of the traction member 13 is in the shape of a tube, so the outer diameter of the delivery catheter D can be made thinner. As a result, the ability of the delivery catheter D to follow the blood vessels can be improved. From a cost perspective, stainless steel (SUS) or the like is preferred as the metal material constituting the metal wire.

[0078] The forward-preventing part 9 is fixed to the storage member 2 and has an outer diameter larger than the inner diameter of the smallest part of the insertion passage 8A. Its material and shape are not particularly limited, and it may be made of resin or metal. The method of fixing the forward-preventing part 9 to the storage member 2 is also not particularly limited; it may be fixed by welding, bonding, winding a long, slender member into a coil, or crimping a tubular member. Furthermore, the forward-preventing part 9 may be formed from the storage member 2, or a portion of the storage member 2 may be processed to have an outer diameter larger than the outer diameter of the insertion passage 8A. For example, the shape of a part of the storage member 2 or its proximal end may be processed. Specifically, the storage member 2 may be processed to have its outer diameter expanded by heat (flaring, tapering, creating thickened sections), bent, or coiled. As for the method of forming the forward-preventing part 9, bonding a resin pipe or crimping a stainless steel pipe is more preferable in terms of ease of manufacture.

[0079] Preferably, the distal end of the forward-preventing part 9 is in contact with the proximal end of the movable body 5. When the distal end of the forward-preventing part 9 is in contact with the proximal end of the movable body 5, the ends of the forward-preventing part 9 and the movable body 5 come into contact with each other, making it less likely for the storage member 2 to which the forward-preventing part 9 is fixed to move distally.

[0080] Furthermore, it is preferable that the distal end of the forward-preventing part 9 be positioned distal to the proximal end of the movable body 5. Positioning the distal end of the forward-preventing part 9 distal to the proximal end of the movable body 5 means, for example, that the proximal end of the movable body 5 has a hole larger than the outer shape of the distal end of the forward-preventing part 9, into which the distal end of the forward-preventing part 9 fits, or that the distal end of the forward-preventing part 9 has a hole larger than the outer shape of the proximal end of the movable body 5, into which the proximal end of the movable body 5 fits. By positioning the distal end of the forward-preventing part 9 distal to the proximal end of the movable body 5, the distal end of the forward-preventing part 9 and the proximal end of the movable body 5 engage, making it more difficult for the storage member 2 to move distally.

[0081] Preferably, the distal end of the forward-preventing part 9 is distal to the proximal end of the insertion passage 8A, and the proximal end of the forward-preventing part 9 is proximal to the distal end of the insertion passage 8A. By having the distal end of the forward-preventing part 9 distal to the proximal end of the insertion passage 8A, and the proximal end of the forward-preventing part 9 being proximal to the distal end of the insertion passage 8A, the moving body 5 having the insertion passage 8A can prevent the longitudinal movement of the storage member 2.

[0082] The movable body 5 has a holding portion 8, and it is preferable that the insertion passage 8A is formed in the holding portion 8. By having the movable body 5 have a holding portion 8 in which the insertion passage 8A is formed, the forward-preventing portion 9 and the holding portion 8 of the movable body 5 come into contact, increasing the contact area of ​​the forward-preventing portion 9 and enhancing the effect of preventing the movement of the storage member 2.

[0083] It is preferable that the forward-preventing part 9 is positioned in contact with the holding part 8. By positioning the forward-preventing part 9 in contact with the holding part 8, the holding part 8 can prevent the forward-preventing part 9 from moving. As a result, the storage member 2 to which the forward-preventing part 9 is fixed can also be made less likely to move.

[0084] Preferably, the distal end of the forward-preventing part 9 is in contact with the proximal end of the holding part 8. When the distal end of the forward-preventing part 9 is in contact with the proximal end of the holding part 8, the ends of the forward-preventing part 9 and the holding part 8 come into contact with each other, increasing the contact area and further preventing the storage member 2 from moving distally.

[0085] It is also preferable that the distal end of the forward-preventing part 9 be located distal to the proximal end of the holding part 8. In other words, it is preferable that the forward-preventing part 9 can move distally beyond the proximal end of the holding part 8. By allowing the distal end of the forward-preventing part 9 to be located distal to the proximal end of the holding part 8, the distal end of the forward-preventing part 9 and the insertion passage 8A formed in the holding part 8 will come into contact with each other, increasing the contact area. Therefore, the friction generated between the distal end of the forward-preventing part 9 and the insertion passage 8A of the holding part 8 can enhance the effect of preventing the movement of the storage member 2.

[0086] Furthermore, as shown in Figure 5(b), the forward-preventing part 9 may be positioned to abut against the proximal end of the insertion passage 8A. In this case, the forward-preventing part 9 is not fixed to the holding part 8, but is configured to rotate freely inside the insertion passage 8A. As a result, when the storage member 2 or the traction member 13 is pulled proximal to place the stent ST inside the body, the stent ST can be placed quickly. In addition, the forward-preventing part 9 provided on the storage member 2 or the traction member 13 can be prevented from moving near the proximal end of the holding part 8 and colliding with other members inside the handle H.

[0087] If the insertion passage 8A is a hole, as shown in Figure 5(c), the inner diameter of the insertion hole is not constant, and there may be a region at the proximal end of the insertion passage 8A of the holding part 8 where the diameter of the insertion hole is enlarged, and the forward-preventing part 9 abuts against it, and the forward-preventing part 9 may enter into the region where the inner diameter is enlarged. In this case, the forward-preventing part 9 is not fixed to the holding part 8, but is configured to rotate freely inside the insertion passage 8A. With this configuration, when the storage member 2 or the traction member 13 is pulled proximal to place the stent ST in the body, the stent ST can be placed quickly. Furthermore, since the radial movement of the forward-preventing part 9 within the holding part 8 is hindered, and at the same time the radial movement of the storage member 2 or the traction member 13 is hindered, the positional relationship between the tip of the storage member 2 and the stent ST does not shift, resulting in the greater effect of improving the accuracy of placing medical tubular bodies ST such as stents.

[0088] Furthermore, as shown in Figure 5(c), a retraction prevention part 10 may be provided on the distal side of the insertion passage 8A. As described above, the storage member 2 is rotatable within the insertion passage 8A and is not fixed to the retaining part 8 or the movable body 5 (sliding body). Therefore, due to misoperation, the storage member 2 may move proximal, potentially causing the stent ST to deploy unintentionally. On the other hand, if the storage member 2 has a retraction prevention part 10 positioned to contact the retaining part 8 on the distal side of the insertion passage 8A, then if the storage member 2 attempts to move proximal due to misoperation, such as accidentally pulling the storage member 2 towards the proximal side before surgery, the retraction prevention part 10 will contact the distal end of the retaining part 8, thereby preventing the stent ST from deploying unintentionally.

[0089] Furthermore, it is preferable that the storage member 2 consists of an outer tube 15 and a traction member 13 connected to the outer tube 15, in terms of improving the pushability of the medical tubular transport device SDS, reducing the outer diameter of the delivery catheter D, and reducing the size of the retraction prevention part 10.

[0090] Similar to the forward-preventing part 9, the backward-preventing part 10 is fixed to the traction member 13 and has an outer diameter larger than the inner diameter of the insertion passage 8A. Its material and shape are not particularly limited, and it may be made of resin or metal. The fixing method is also not particularly limited; it may be fixed by welding, bonding, winding a long, slender member into a coil, or crimping a tubular member. Furthermore, the backward-preventing part 10 may be formed from the storage member 2, and a portion of the storage member 2 may be processed to have an outer diameter larger than the outer diameter of the insertion passage 8A. For example, the shape of a portion of the storage member 2 may be processed. Specifically, the storage member 2 may be processed to have its outer diameter expanded by heat (flaring, tapering, creating thickened sections), bent, coiled, etc. As for the method of forming the backward-preventing part 10, bonding a resin pipe or crimping a stainless steel pipe is more preferable in terms of ease of manufacture.

[0091] The storage member 2 has a retraction prevention portion 10 distal to the forward prevention portion 9, and it is preferable that at least a part of the retraction prevention portion 10 is in contact with the movable body 5. Because the storage member 2 has a retraction prevention portion 10 located distal to the forward prevention portion 9 and in contact with the movable body 5 in at least a part, if a user of the stent delivery system SDS attempts to move the storage member 2 proximally due to a misoperation, the retraction prevention portion 10 prevents the storage member 2 from moving proximally, thereby preventing unintended deployment of the stent ST.

[0092] Preferably, the proximal end of the retraction prevention part 10 is in contact with the distal end of the movable body 5. By the proximal end of the retraction prevention part 10 being in contact with the distal end of the movable body 5, the ends of the retraction prevention part 10 and the movable body 5 come into contact with each other, increasing the contact area and enhancing the effect of preventing the storage member 2 from moving towards the proximal side.

[0093] Furthermore, it is preferable that the proximal end of the retraction prevention part 10 be positioned proximal to the distal end of the movable body 5. By positioning the proximal end of the retraction prevention part 10 proximal to the distal end of the movable body 5, the proximal end of the retraction prevention part 10 and the distal end of the movable body 5 can be fitted together, making it difficult for the storage member 2 to move proximal.

[0094] Preferably, the distal end of the retraction prevention part 10 is distal to the proximal end of the insertion passage 8A, and the proximal end of the retraction prevention part 10 is proximal to the distal end of the insertion passage 8A. By having the distal end of the retraction prevention part 10 distal to the proximal end of the insertion passage 8A, and the proximal end of the retraction prevention part 10 being proximal to the distal end of the insertion passage 8A, the effect of preventing the movable body 5 having the insertion passage 8A from moving in the longitudinal direction of the storage member 2 can be enhanced.

[0095] It is preferable that the retraction prevention part 10 is positioned in contact with the holding part 8. By positioning the retraction prevention part 10 in contact with the holding part 8, the holding part 8 can prevent the retraction prevention part 10 from moving. As a result, the movement of the storage member 2 can be further hindered.

[0096] It is preferable that the proximal end of the retraction prevention part 10 is in contact with the distal end of the holding part 8. By having the proximal end of the retraction prevention part 10 in contact with the distal end of the holding part 8, the ends of the retraction prevention part 10 and the holding part 8 come into contact with each other, increasing the contact area and enhancing the effect of preventing the storage member 2 from moving towards the proximal side.

[0097] It is also preferable that the proximal end of the retraction prevention part 10 be positioned proximal to the distal end of the holding part 8. In other words, it is preferable that the retraction prevention part 10 can move proximal to the end beyond the distal end of the movable body 5. By positioning the proximal end of the retraction prevention part 10 proximal to the distal end of the holding part 8, the proximal end of the retraction prevention part 10 and the insertion passage 8A of the movable body 5 come into contact with each other, increasing the contact area between the retraction prevention part 10 and the movable body 5. As a result, the friction generated between the proximal end of the retraction prevention part 10 and the insertion passage 8A enhances the effect of preventing the movement of the storage member 2.

[0098] As shown in Figure 3, if the storage member 2 is composed of an outer tube 15 and a traction member 13 connected to the outer tube 15, and the protective tube 14 has the proximal end of the outer tube 15, the proximal end of the inner tube 1, and the traction member 13 arranged in its lumen, and a guide wire port 12 is provided, then a forward-preventing part 9 may be provided on the traction member 13 proximal to the insertion passage 8A, and a backward-preventing part 10 may be provided on the traction member 13 distal to the insertion passage 8A. With the traction member 13 equipped with both a forward-preventing part 9 and a backward-preventing part 10, the outer tube 15 located at the tip of the medical tubular transport device SDS can be pulled proximal by operating the handle H, while the guide wire port 12 for inserting the guide wire necessary for transporting the medical tubular body ST into the body is provided. Furthermore, even if the delivery catheter D twists when the medical tubular transport device SDS is delivered to the treatment site, the twisting of the delivery catheter D can be resolved by rotating the handle H relative to the delivery catheter D.

[0099] Furthermore, providing both the forward-preventing section 9 and the backward-preventing section 10 on the traction member 13 is more effective because it allows the storage member 2 to rotate while preventing collision between the storage member 2 and the tip F, and also prevents unintended deployment of the stent ST.

[0100] The stent delivery system SDS has a protective member 11 positioned on the traction member 13, and it is preferable that the protective member 11 abuts against the retraction prevention part 10. By positioning the protective member 11 on the traction member 13 and abutting against the retraction prevention part 10, the storage member 2 is prevented from bending and retracting within the handle H, thereby preventing the stent ST from unintentionally deploying.

[0101] Furthermore, as shown in Figure 5(c), the protective member 11 may be positioned distal to the distal end of the holding portion 8 provided on the movable body 5 (slide body) so as to cover the storage member 2. In Figure 5(c), the protective member 11 is in contact with the tip side of the retraction prevention portion 10. By providing the protective member 11, it is possible to prevent the storage member 2 from retracting due to bending within the handle H and unintentionally deploying the stent ST. The material and shape of the protective member 11 are not limited as long as it can cover the storage member 2, but resin materials such as polyamide, polyamide elastomer, and polyethylene are preferred. The protective member 11 may also be attached to the handle H or to the protective tube 14. In addition, the retraction prevention portion 10 may be omitted, and the protective member 11 may also serve the role of the retraction prevention portion 10.

[0102] It is preferable that the protective member 11 is fixed to the base body I. By fixing the protective member 11 to the base body I, when the storage member 2 is subjected to a force that causes it to bend inside the handle H, the protective member 11, which is positioned to cover the storage member 2, is prevented from bending, and the bending of the storage member 2 can be effectively prevented.

[0103] It is preferable that the protective member 11 is fixed to the protective tube 14. By fixing the protective member 11 to the protective tube 14, the protective member 11 can support the storage member 2 from the outside, thereby enhancing the effect of preventing the storage member 2 from bending.

[0104] Preferably, the protective tube 14 is fixed to the base I and rotatable relative to the handle H. Because the protective tube 14 is fixed to the base I and rotatable relative to the handle H, it is less likely to bend, and bending of the protective tube 14 can prevent the storage member 2 from bending as a result. Furthermore, because the protective tube 14 is rotatable relative to the handle H, if the protective tube 14 becomes twisted, the twist can be corrected by rotating the handle H.

[0105] Preferably, the inner tube 1 is fixed to the base I and rotatable relative to the handle H. Because the inner tube 1 is fixed to the base I and rotatable relative to the handle H, the inner tube 1 is less likely to bend, and bending of the inner tube 1 prevents the storage member 2 from bending as well. Furthermore, if the inner tube 1 becomes twisted, the twist of the delivery catheter D can be corrected by rotating the handle H.

[0106] Furthermore, as shown in Figures 1 and 4, it is preferable that the inner tube 1 has a receiving member G attached to its proximal end so that it can be fitted into the cavity at the distal end of the handle H. Having the receiving member G and being able to fit onto the handle H allows the inner tube 1 to be rotatably mounted to the handle H. Additionally, if a protective tube 14 is present, although not shown, a receiving member G may be attached near the proximal end of the protective tube 14 so that it can be fitted into the cavity near the distal end of the handle H. Having the receiving member G and being able to fit onto the handle H allows the protective tube 14 to be rotatably mounted to the handle H. The inner tube 1 and the protective tube 14 may be attached to the handle H separately, or they may be attached together.

[0107] As described above, the configuration allows the inner tube 1, storage member 2 (outer tube 15 and traction member 13), and protective tube 14 to rotate relative to the handle H. Therefore, even if the delivery catheter D twists when delivering the stent delivery system SDS to the treatment site, the handle H can rotate relative to the delivery catheter D, allowing the handle H to be operated regardless of the orientation of the delivery catheter D. Furthermore, not only the storage member 2, which is movable for implanting the medical tubular body ST, but also the inner tube 1 and protective tube 14, which support the implantation of the medical tubular body ST, can rotate relative to the handle H, resulting in the effect of making the medical tubular body transport device SDS even less prone to twisting. In addition, interference between these components, particularly the entanglement of the traction member 13, can be reduced.

[0108] This application claims the benefit of priority based on Japanese Patent Application No. 2021-058325, filed on March 30, 2021. The entire specification of Japanese Patent Application No. 2021-058325, filed on March 30, 2021, is incorporated herein by reference. [Explanation of symbols]

[0109] 1: Inner tube 2: Storage components 3: Thumbwheel 3A: Gear section 4: Rotating body 4A: Teeth of a rotating body 5: Mobile 5A: Teeth of the rack 6: Drive unit 8: Holding part 8A: Insertion passage 9: Advance prevention part 10: Backward prevention part 11: Protective component 12: Guide wire port 13: Towing component 14: Protective tube 15: Outer tube A: Proximal side B: Distal side D: Delivery catheter F: Tip G: Receiving device H: Handle I: Substrate P: Pusher component SDS: Medical Tubular Material Transport Device ST: Medical tubular body

Claims

1. A device for transporting medical tubular objects into the body, A base with a cavity, A protective tube having a first end and a second end in the longitudinal axis direction, and having a lumen and an opening disposed at the first end, wherein the first end is disposed outside the base, the second end is disposed on the base, and the protective tube is attached to the base so as to be rotatable relative to the base, An inner tube is attached to the base so as to be rotatable with respect to the base, and extends from the opening to the outside of the protective tube, passing through the lumen of the protective tube. An outer tube having a tubular portion at one end in the longitudinal direction whose inner diameter is larger than the outer diameter of the inner tube and whose outer diameter is smaller than the inner diameter of the protective tube, wherein the tubular portion is inserted into the protective tube from the first end of the protective tube so as to place the inner tube in its lumen, the outer tube is rotatably arranged relative to the inner tube and the protective tube, A traction member that is passed through the lumen of the protective tube and arranged on the outer tube inside the base, the traction member to which the forward-preventing portion is fixed, A movable body is movably attached to the base, comprising a through hole having a diameter larger than the outer diameter of the traction member and smaller than the outer diameter of the forward-preventing part, the portion of the traction member between the outer tube and the forward-preventing part having a holding portion that passes through the through hole, The base is attached to the aforementioned drive unit which is capable of moving the movable body, The inner tube is passed through the lumen of the medical tubular body so that the medical tubular body is housed between the inner tube and the outer tube. A medical tubular body transport device configured such that the drive unit moves the movable body, causing the holding unit to move toward the forward-preventing unit and come into contact with the forward-preventing unit, and after contact, the holding unit moves further toward the forward-preventing unit, causing the outer tube to move toward the base.

2. The medical tubular body transport device according to claim 1, wherein the base holds the inner tube.

3. The medical tubular body transport device according to claim 1 or 2, wherein the distal end of the forward-preventing part is in contact with the proximal end of the holding part.

4. The medical tubular body transport device according to any one of claims 1 to 3, wherein the distal end of the forward-preventing part is located distal to the proximal end of the holding part.

5. The distal end of the forward-preventing portion is located distal to the proximal end of the through hole. The medical tubular body transport device according to claim 4, wherein the proximal end of the forward-preventing portion is located proximal to the distal end of the through-hole.

6. The medical tubular body transport device according to any one of claims 1 to 5, wherein the forward-preventing part is arranged in contact with the holding part.

7. The medical tubular body transport device according to claim 6, wherein the distal end of the forward-preventing part is in contact with the proximal end of the holding part.

8. The medical tubular body transport device according to claim 6, wherein the distal end of the forward-preventing part can be positioned distal to the proximal end of the holding part.

9. The traction member has a reversal prevention portion distal to the forward prevention portion, A medical tubular body transport device according to any one of claims 1 to 8, wherein at least a portion of the retraction prevention part is in contact with the moving body.

10. The medical tubular body transport device according to claim 9, wherein the proximal end of the retraction prevention part is in contact with the distal end of the moving body.

11. The medical tubular body transport device according to claim 9, wherein the proximal end of the retraction prevention part can be positioned proximal to the distal end of the moving body.

12. The distal end of the retraction prevention portion is located distal to the proximal end of the through hole. The medical tubular body transport device according to claim 11, wherein the proximal end of the retraction prevention portion is located proximal to the distal end of the through hole.

13. The medical tubular body transport device according to any one of claims 9 to 12, wherein the retraction prevention part is arranged in contact with the holding part.

14. The medical tubular body transport device according to claim 13, wherein the proximal end of the retraction prevention part is in contact with the distal end of the holding part.

15. The medical tubular body transport device according to claim 13, wherein the proximal end of the retraction prevention portion can be positioned more proximal to the distal end of the holding portion.

16. It has a protective member positioned on the traction member, The protective member abuts against the retraction prevention portion in the medical tubular body transport device according to any one of claims 9 to 15.

17. The medical tubular body transport device according to claim 16, wherein the protective member is fixed to the base body.

18. The medical tubular body transport device according to claim 16 or 17, wherein the protective member is fixed to the protective tube.

19. The medical tubular body transport device according to any one of claims 1 to 18, wherein the protective tube has a guide wire port through which a guide wire is inserted and which communicates with the inner tube.

20. The receiving member is fitted into the cavity and is rotatable relative to the base, The medical tubular body transport device according to any one of claims 1 to 19, wherein the protective tube is attached to the receiving device.

21. The medical tubular body transport device according to any one of claims 1 to 20, wherein the second end of the protective tube is disposed inside the base body.

22. The medical tubular body transport device according to any one of claims 1 to 21, wherein the inner tube is fixed to the protective tube.

23. The medical tubular body transport device according to any one of claims 1 to 22, wherein the traction member is a wire.

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