JP7598819B2 - Medical device holder and catheter - Google Patents

Description

The technology disclosed in this specification relates to a medical device holder that holds an elongated medical device.

A method using a long medical device is widely used as a method for treating or inspecting stenosis, occlusion, abnormal blood vessels, etc. (hereinafter referred to as "lesions") in blood vessels, etc. (see Patent Document 1 below). An example of this type of medical device is a guidewire intended to penetrate a relatively hard lesion, such as a lesion called chronic total occlusion (CTO). Medical device holders for holding such medical devices have been known in the past. This medical device holder has a single cylindrical body, and the medical device is inserted into and held in the lumen of the cylindrical body. A doctor or other practitioner grasps the cylindrical body to operate the medical device.

Japanese Patent Application Publication No. 9-173465

For example, if the lesion is hard and difficult to penetrate, the technician may need to rotate the medical device while pushing it toward the tip. However, with conventional medical device holders, the medical device inserted into the lumen is held integrally in a single tubular body. For this reason, it is difficult to simultaneously rotate the medical device and advance it toward the tip using the medical device holder, making it difficult to perform treatment using the medical device smoothly.

This specification discloses a technology that can solve the above-mentioned problems.

The technology disclosed in this specification can be realized, for example, in the following forms:

(1) The medical device holding device disclosed in this specification is a medical device holding device comprising: a tubular holding member having a first lumen and capable of holding a long medical device inserted into the first lumen, the holding member having a first helical threaded portion formed around the axis of the holding member; and a tubular support member arranged coaxially with the holding member, communicating with the first lumen, and having a second lumen into which the medical device is inserted, the support member having a second threaded portion formed helically around the axis of the support member and threadedly engaging with the first threaded portion, the medical device holding device being configured such that the holding member advances relative to the support member by rotating the holding member in a first direction relative to the support member, and the holding member retreats relative to the support member by rotating the holding member in a second direction opposite to the first direction. In this medical device holder, when the holding member that holds the long medical device is rotated relative to the support member, the holding member moves in the axial direction relative to the support member. In other words, with this medical device holder, by grasping the holding member and rotating it, it is possible to simultaneously rotate the medical device and move it forward toward the tip side.

(2) In the above medical device holder, the support member may have a receiving hole that communicates with the first lumen and can receive at least a part of the holding member, the second threaded portion is formed on the inner circumferential surface of the receiving hole of the support member, and the first threaded portion is formed on the outer circumferential surface of at least a part of the holding member. If a part of the support member is inserted into the receiving hole formed in the holding member and screwed, the difference in diameter between the part of the holding member that holds the medical device and the part that screws into the support member is relatively large. For this reason, for example, the torque transmission from the part that holds the medical device to the part that screws into the support member may decrease, and as a result, the operability of the medical device may decrease. In contrast, in this medical device holder, the difference in diameter between the part of the holding member that holds the medical device and the part that screws into the support member is relatively small. For this reason, it is possible to suppress the decrease in torque transmission from the part that holds the medical device to the part that screws into the support member.

(3) In the above medical device holder, the second lumen may be formed on the distal end side of the support member, the receiving hole may be formed on the proximal end side of the support member, and the at least a portion of the holding member may include the distal end of the holding member, and a gripping portion may be provided on the proximal end side of the first threaded portion of the holding member. According to this medical device holder, the gripping portion for gripping the holding member is located on the proximal end side of the support member, so that the operator can easily grip the holding member and smoothly perform rotation operations.

(4) In the above medical device holder, at least one of the holding member and the support member may be provided with a stopper portion that limits the number of rotations of the holding member in the direction in which the holding member advances relative to the support member to a predetermined number of times. This medical device holder can prevent the medical device from being damaged by excessive rotation of the holding member.

(5) In the above medical device holder, the axial length of the second lumen in the support member may be shorter than the axial length of the first lumen in the holding member. This medical device holder can reduce the contact resistance between the medical device and the inner wall surface of the support member compared to a configuration in which the axial length of the second lumen in the support member is equal to or longer than the axial length of the first lumen in the holding member, allowing the medical device to rotate and move forward toward the tip side smoothly.

(6) The catheter disclosed in this specification comprises a hollow shaft and the above-mentioned medical device holder, in which the base end of the shaft is attached to the support member. With this catheter, the medical device inserted into the shaft can be rotated and advanced toward the tip side at the same time.

The technology disclosed in this specification can be realized in various forms, such as a medical device holder, a catheter equipped with the medical device holder, and methods of using and manufacturing the same.

FIG. 1 is an explanatory diagram showing a schematic configuration of a catheter 1 according to a first embodiment. FIG. 1 is an explanatory diagram illustrating a schematic configuration of a catheter holding device 100. FIG. 13 is an explanatory diagram illustrating a schematic configuration of a catheter holding tool 100a according to a second embodiment.

A. First embodiment:
A-1. Configuration of catheter 1:
FIG. 1 is an explanatory diagram showing a schematic configuration of a catheter 1 in this embodiment. FIG. 1 shows a longitudinal cross-sectional configuration of the catheter 1. Here, in this specification, the longitudinal cross-section of a given member refers to a cross-section (YZ cross-section in FIG. 1) parallel to the axial direction of the given member (the longitudinal direction (Z-axis direction) of the catheter 1 in FIG. 1). In FIG. 1, a part of the catheter 1 is omitted. Also, in FIG. 1, the positive Z-axis direction side is the tip side (distal side) inserted into the body, and the negative Z-axis direction side is the base end side (proximal side) operated by a technician such as a doctor. In this specification, the tip end of the catheter 1 and each of its constituent members is referred to as the "tip", the tip and its vicinity are referred to as the "tip portion", the base end side is referred to as the "base end", and the base end and its vicinity are referred to as the "base end". Note that FIG. 1 shows a state in which the catheter 1 is linearly parallel to the Z-axis direction as a whole, but the catheter 1 has flexibility to the extent that it can be curved.

The catheter 1 of this embodiment includes a guiding catheter 80 that guides the penetration catheter 70, and a catheter holder 100 that holds the penetration catheter 70.

The penetrating catheter 70 is a flexible, long medical device that is inserted into a blood vessel or the like for the main purpose of penetrating a relatively hard lesion, such as a lesion called chronic total occlusion (CTO). The penetrating catheter 70 has, for example, a metal shaft 72 and a tapered tip 74 provided at the tip of the shaft 72. The total length of the penetrating catheter 70 is, for example, 1500 mm or more and 2000 mm or less. The penetrating catheter 70 is an example of a medical device in the scope of the claims, and the catheter holder 100 is an example of a medical device holder in the scope of the claims.

(Guiding Catheter 80):
The guiding catheter 80 includes a sheath 82 and a connector 90. The sheath 82 is a long, flexible tubular member, and more specifically, is a flexible tube made of, for example, resin or metal. The penetrating catheter 70 is inserted into a space 84 of the sheath 82. The guiding catheter 80 is an example of a shaft as defined in the claims.

The connector 90 is a substantially cylindrical member connected to the base end of the sheath 82. The hollow portion 92 of the connector 90 is formed so as to communicate with the space 84 of the sheath 82 and open to the base end face of the connector 90. The device insertion portion 20 of the support member 10 of the catheter holder 100, which will be described later, is removably attached to the hollow portion 92. The connector 90 is formed with a water supply port 94 configured to be able to supply a medicinal solution or the like into the space 84 of the sheath 82 by attaching a syringe or the like (not shown).

(Catheter holding device 100):
Fig. 2 is an explanatory diagram showing a schematic configuration of the catheter holding tool 100. Fig. 2 shows a longitudinal sectional configuration (YZ cross section) of the catheter holding tool 100. As shown in Fig. 2, the catheter holding tool 100 includes a support member 10 and a holding member 50.

As shown in FIG. 2, the holding member 50 has a base member 52, a locking member 60, and an elastic member 62. The base member 52 is a hollow body with a tubular shape (e.g., cylindrical shape) with openings at the tip and base ends. In this specification, the term "tubular shape" does not mean a completely cylindrical shape (cylindrical shape), but may mean a substantially cylindrical shape overall (such as a slightly conical shape or a shape with some unevenness). Inside the base member 52, a first lumen 54 (through hole) is formed that extends from the tip to the base end of the base member 52. For example, the above-mentioned penetration catheter 70 is inserted into the first lumen 54.

A male thread portion 53 is formed on the outer peripheral surface, including the tip, of the base member 52 of the holding member 50. The male thread portion 53 is a screw thread formed in a spiral shape in the circumferential direction centered on the axis O of the catheter holding device 100 (support member 10). The male thread portion 53 is an example of a first thread portion in the claims.

The base end of the base member 52 of the holding member 50 is provided with a large diameter section 58 having a larger outer diameter than the tip side of the base member 52. When viewed in a direction along the axis O of the catheter holding device 100 (hereinafter sometimes referred to as the "axis O direction"), the shape of the large diameter section 58 is annular. A locking screw section 59 is formed on the outer circumferential surface of the large diameter section 58. The locking screw section 59 is a male screw or female screw formed in a spiral shape in the circumferential direction centered on the axis O. The inner diameter of the large diameter section 58 is larger than the diameter of the first lumen 54 of the base member 52. That is, a lock insertion hole 51 into which a pressing section 64 of the locking member 60 described later is inserted is opened and formed on the base end side of the male screw section 53. The lock insertion hole 51 has a larger diameter than the first lumen 54 formed in the base member 52, and is coaxially connected to the first lumen 54.

The outer peripheral surface of the base member 52 of the holding member 50 is provided with a stopper portion 56 on the base end side of the male thread portion 53. Specifically, the stopper portion 56 is a portion formed so as to protrude from the outer peripheral surface of the base member 52 to the radial outside of the holding member 50. In this embodiment, the shape of the stopper portion 56 as viewed from the axial O direction is annular. In addition, the stopper portion 56 is disposed between the male thread portion 53 and the large diameter portion 58 in the axial O direction. The male thread portion 53 is continuously formed from the tip of the base member 52 to the stopper portion 56. In addition, the stopper portion 56 and the large diameter portion 58 are disposed at positions spaced apart from each other in the axial O direction. This makes it possible to suppress the occurrence of variations in strength throughout the holding member 50 due to the hardening of a specific portion of the holding member 50. The base member 52 is formed of, for example, a resin (elastomer, fluororesin, super engineering plastics (polymer material), etc.), but may be formed of a material other than resin (for example, metal).

The elastic member 62 is a ring-shaped member formed of an elastic material or the like. In the non-elastic state, the inner diameter of the elastic member 62 is approximately the same as the diameter of the first lumen 54 of the base member 52, and the outer diameter of the elastic member 62 is larger than the diameter of the first lumen 54 and is equal to or smaller than the inner diameter of the large diameter portion 58 of the base member 52. The elastic member 62 is arranged so as to contact the step surface between the lock insertion hole 51 in the base member 52 and the first lumen 54.

The locking member 60 has a pressing portion 64, a gripping portion 66, and a connecting portion 68. The pressing portion 64 is an annular portion that can be inserted into the lock insertion hole 51 of the base member 52.

The gripping portion 66 is an annular portion arranged to surround the outer periphery of the pressing portion 64. The inner diameter of the gripping portion 66 is larger than the outer diameter of the large diameter portion 58 of the base member 52. A locking screw portion 69 that can be screwed into the locking screw portion 59 formed on the large diameter portion 58 is formed on the inner peripheral surface of the gripping portion 66. The locking screw portion 69 is a male or female screw formed in a spiral shape in the circumferential direction centered on the axis O. The connecting portion 68 is a portion that connects the base end of the pressing portion 64 and the base end of the gripping portion 66.

For example, the penetrating catheter 70 is inserted into the first lumen 54 of the base member 52, the inner circumferential side of the elastic member 62, and the inner circumferential side of the locking member 60, the elastic member 62 is placed in the lock insertion hole 51 of the base member 52, and the locking screw portion 69 of the locking member 60 is screwed into the locking screw portion 59 of the base member 52. As a result, the pressing portion 64 of the locking member 60 moves toward the tip of the holding member 50 along the axis O direction, and the elastic member 62 placed in the lock insertion port 51 is sandwiched between the base member 52 and the pressing portion 64 of the locking member 60 and elastically deforms, so that the inner circumferential surface of the elastic member 62 is pressed against the outer circumferential surface of the penetrating catheter 70, thereby holding the penetrating catheter 70 against the base member 52. The locking member 60 is formed, for example, from a resin (elastomer, fluororesin, super engineering plastics (polymer material), etc.), but may be formed from a material other than resin (for example, metal).

When the locking member 60 is attached to the base member 52, the gripping portion 66 is provided on the proximal side of the holding member 50 and is gripped by the operator. The outer diameter of the gripping portion 66 is larger than the maximum outer diameter of the support member 10. This makes it easier for the operator to fine-tune the rotation of the holding member 50 compared to a configuration in which the outer diameter of the gripping portion 66 is equal to or smaller than the outer diameter of the support member 10.

The support member 10 is a hollow body having a tubular (e.g., cylindrical) shape with an opening at the tip and base ends. The support member 10 is arranged coaxially with the holding member 50. The support member 10 has a device insertion section 20 and a storage section 30.

The device insertion section 20 is a portion including the tip of the support member 10, and inside the device insertion section 20, a second lumen 22 (through hole) is formed extending from the tip to the base end of the device insertion section 20. For example, the above-mentioned penetration catheter 70 is inserted into the second lumen 22. The outer peripheral surface on the tip side of the device insertion section 20 is substantially the same cylindrical shape over the entire length in the axial O direction. The outer peripheral surface on the base end side of the device insertion section 20 is an inverted tapered shape in which the diameter continuously increases toward the base end of the device insertion section 20. As shown in FIG. 1, the tip of the support member 10 (device insertion section 20) is pressed into the hollow section 92 of the connector 90, so that the sheath 82 can be connected to the tip of the support member 10 via the connector 90.

The storage section 30 is cylindrical with an outer diameter and an inner diameter that are substantially the same over the entire length. Inside the storage section 30, a storage hole 32 capable of storing the tip side of the base member 52 is formed. The storage hole 32 is a cylindrical space extending in the axial O direction. The storage hole 32 is located coaxially with the second lumen 22, and the diameter of the storage hole 32 is larger than the diameter of the second lumen 22. In addition, the axial length of the second lumen 22 in the support member 10 is shorter than the axial length of the first lumen 54 in the holding member 50.

A female thread 33 is formed on the inner peripheral surface of the housing 30 of the support member 10. The female thread 33 is a screw groove formed in a spiral shape in the circumferential direction centered on the axis O. The female thread 33 is formed over the entire length of the housing hole 32. The length of the female thread 33 (housing hole 32) in the housing 30 in the axial direction O is longer than the length of the male thread 53 in the base member 52 in the axial direction O. The female thread 33 is an example of a second threaded portion in the claims. The support member 10 is formed, for example, from a resin (elastomer, fluororesin, super engineering plastics (polymer material), etc.), but may be formed from a material other than resin (for example, metal).

A-2. Advantages of this embodiment:
As described above, the catheter holding tool 100 of this embodiment includes the holding member 50 into which the penetrating catheter 70 is inserted and which holds the inserted penetrating catheter 70, and the support member 10 which is attached to the guiding catheter 80. The tip side (male thread portion 53) of the holding member 50 is inserted into the receiving hole 32 formed at the base end of the support member 10, and is screwed into the female thread portion 33 formed on the inner peripheral wall constituting the receiving hole 32. As a result, when the holding member 50 is rotated relative to the support member 10, the holding member 50 moves in the front-rear direction of the axis O relative to the support member 10. That is, according to the catheter holding tool 100, by gripping the holding member 50 and performing a rotating operation, the penetrating catheter 70 can be rotated and advanced toward the tip side at the same time, and as a result, the procedure using the penetrating catheter 70 can be performed efficiently. Note that one direction around axis O (direction M in FIG. 1) is an example of a first direction in the claims, and the other direction around axis O (the direction opposite to direction M in FIG. 1) is an example of a second direction in the claims.

Specifically, for example, in the configuration shown in FIG. 1, if the support member 10 and the holding member 50 in the catheter holding device 100 are integrated so that they cannot rotate or move relative to each other, and the catheter holding device 100 and the guiding catheter 80 are not connected, it is difficult to efficiently perform a procedure using the penetrating catheter 70. That is, in such a configuration, the operator needs to have advanced skills to advance the catheter holding device 100 while rotating it, while separately grasping the catheter grasping device 100 holding the penetrating catheter 70 and the guiding catheter 80. In addition, in such a configuration, it is difficult for the operator to advance the penetrating catheter 70 by the intended amount.

In contrast, as shown in FIG. 1, in the catheter 1 of this embodiment, the guiding catheter 80 is connected to the support member 10 of the catheter holder 100 via the connector 90. Therefore, by grasping the support member 10, the position and posture of the guiding catheter 80, which is displaced integrally with the support member 10, can be manipulated. The penetrating catheter 70 is held by the holding member 50 of the catheter holder 100. Therefore, by grasping and manipulating the holding member 50, the position and posture of the penetrating catheter 70 can be manipulated. For example, by rotating the holding member 50, the penetrating catheter 70 rotates integrally with the holding member 50. The supporting member 10 and the holding member 50 are screwed together, and when the holding member 50 is rotated relative to the supporting member 10, the holding member 50 moves in the forward and backward directions along the axis O relative to the supporting member 10. Therefore, the operator does not need to grasp the penetrating catheter 70 or the guiding catheter 80, but only grasps the support member 10 and the holding member 50 that constitute the support member 10, and can easily rotate the penetrating catheter 70 and advance it toward the tip side at the same time by rotating the holding member 50 relative to the support member 10. Moreover, since the penetrating catheter 70 advances a distance proportional to the amount of rotation of the holding member 50 relative to the support member 10, the operator can easily advance the penetrating catheter 70 by the intended amount.

In the catheter 1 of this embodiment, compared to a configuration in which the inserting and receiving relationship between the holding member 50 and the support member 10 is reversed, i.e., a configuration in which a part of the support member 10 is inserted into and screwed into a receiving hole formed in the holding member 50, for example, as shown in FIG. 1, the creation of a space between the inner surface of the holding member 50 and the penetrating catheter 70 is suppressed, and therefore the penetrating catheter 70 is prevented from wobbling when the penetrating catheter 70 is rotated in the forward direction. As a result, the catheter 1 of this embodiment allows the penetrating catheter 70 to be operated with greater precision.

In this embodiment, with the locking member 60 attached to the base member 52, the gripping portion 66 is provided on the base end side of the holding member 50 and is gripped by the operator. This allows the operator to easily grip the holding member 50 and perform smooth rotation operations.

In this embodiment, a stopper portion 56 is provided on the outer peripheral surface of the base member 52 of the holding member 50, closer to the base end than the male thread portion 53. Therefore, the relative rotation of the holding member 50 holding the penetrating catheter 70 with respect to the support member 10 is limited to a predetermined number of times. As a result, damage to the penetrating catheter 70 due to excessive rotation of the holding member 50 can be suppressed.

In this embodiment, the axial length of the second lumen 22 in the support member 10 is shorter than the axial length of the first lumen 54 in the holding member 50. This reduces the contact resistance between the penetrating catheter 70 and the inner wall surface of the support member 10 compared to a configuration in which the axial length of the second lumen 22 in the support member 10 is equal to or longer than the axial length of the first lumen 54 in the holding member 50, allowing the penetrating catheter 70 to rotate and move forward toward the tip side smoothly.

B. Second embodiment:
Fig. 3 is an explanatory diagram showing a schematic configuration of the catheter holding tool 100a in the second embodiment. Fig. 3 shows a longitudinal cross-sectional configuration of the catheter holding tool 100a. In the following, among the configurations of the catheter holding tool 100a of the second embodiment, the same configurations as those of the catheter holding tool 100 of the first embodiment described above are denoted by the same reference numerals and the description thereof will be omitted as appropriate.

As shown in FIG. 3, the catheter holder 100a includes a support member 10a and a holding member 50a.

The holding member 50a has a base member 52a and a connector 90a. The base member 52a is a hollow body having a tubular (e.g., cylindrical) shape with an opening at the tip and base end. A receiving hole 54a is formed inside the base member 52a, extending from the tip to the base end of the base member 52a. A male thread portion 53a is formed on the inner circumferential surface of the base member 52a that constitutes the receiving hole 54a. The male thread portion 53a is an example of a first thread portion in the claims.

The connector 90a is a substantially cylindrical member joined to the base end of the base member 52a. The hollow portion 92a of the connector 90a is connected to the receiving hole 54a of the base member 52a. The penetrating catheter 70 is held in the connector 90a by pressing the penetrating catheter 70 into the hollow portion 92a. The connector 90a is formed with a water supply port 94a. The hollow portion 92a is an example of the first lumen in the claims.

The support member 10a is a hollow body with a tubular shape (e.g., a cylindrical shape) with an opening at the tip and base end. The support member 10a is arranged coaxially with the holding member 50a. A second lumen 22a (through hole) extending from the tip to the base end of the support member 10a is formed inside the support member 10a. For example, a penetration catheter 70 is inserted into the second lumen 22a. The base end side of the support member 10a can be accommodated in the accommodation hole 54a of the holding member 50a. A female thread portion 33a is formed on the outer peripheral surface of the base end side of the support member 10a. In addition, a stopper portion 24a is provided on the tip side of the support member 10a. The support member 10a may be configured to be connected to the base end of a hollow shaft (such as a guiding catheter) not shown.

As described above, the catheter holder 100a of this embodiment includes a holding member 50a into which the penetrating catheter 70 is inserted and which holds the catheter, and a support member 10a. The base end side (female thread portion 33a) of the support member 10a is inserted into a receiving hole 54a formed at the tip of the holding member 50, and is screwed into a male thread portion 53a formed on the inner wall constituting the receiving hole 54a. As a result, by grasping and rotating the holding member 50a, the penetrating catheter 70 can be rotated and advanced toward the tip side at the same time.

In this embodiment, a stopper portion 24a is provided on the outer peripheral surface of the support member 10a, closer to the tip than the female thread portion 33a. In other words, the number of rotations of the holding member 50a in the direction in which it advances relative to the support member 10a is limited to a predetermined number of times. This makes it possible to prevent the penetration catheter 70 from being damaged by excessive rotation of the holding member 50a.

C. Variations:
The technology disclosed in this specification is not limited to the above-described embodiments, and can be modified in various forms without departing from the spirit of the invention. For example, the following modifications are also possible.

The configuration of the catheter 1 and catheter holder 100 in the above embodiment is merely an example and can be modified in various ways.

In the first embodiment, a female thread may be formed on the outer peripheral surface of the base member 52 of the holding member 50, and a male thread may be formed on the inner peripheral surface of the support member 10. In the second embodiment, a female thread may be formed on the inner peripheral surface of the holding member 50a, and a male thread may be formed on the outer peripheral surface of the support member 10a.

In the first embodiment, the locking member 60 and the elastic member 62 are used to hold the penetrating catheter 70 in the holding member 50. However, the present invention is not limited to this. For example, the penetrating catheter 70 may be held by being pressed into the first lumen 54 of the holding member 50.

In the first embodiment, the shape of the support member 10 may be, for example, a shape in which the outer diameter is substantially the same over its entire length, or may be a generally tapered cone shape.

In the first embodiment, the guiding catheter 80 and the connector 90 may not be provided. In the first embodiment, the gripping portion 66 may be provided in the center or tip side of the holding member 50 with the locking member 60 attached to the base member 52. In the first embodiment, the holding member 50 may not be provided with the stopper portion 56. The support member 10 may be provided with a stopper portion. For example, in the configuration of FIG. 1, the stopper portion 56 may not be provided, and the tip of the base member 52 may contact the tip wall that constitutes the receiving hole 32 in the support member 10. In the second embodiment, the support member 10a may not be provided with the stopper portion 24a.

In the first embodiment described above, the axial length of the second lumen 22 in the support member 10 may be the same as the axial length of the first lumen 54 in the holding member 50, or may be longer than the axial length of the first lumen 54 in the holding member 50.

In the above embodiment, a penetrating catheter 70 is exemplified as a medical device, but the present invention is not limited to this, and may be, for example, a guidewire. In addition, in the above embodiment, a guiding catheter 80 is exemplified as a shaft, but the present invention is not limited to this, and may be, for example, a catheter for other purposes that does not have a guiding function.

1: Catheter 10, 10a: Support member 20: Device insertion section 22, 22a: Second lumen 24a, 56: Stopper section 30: Storage section 32, 54a: Storage hole 33, 33a: Female thread section 50, 50a: Holding member 51: Lock insertion hole 52, 52a: Base member 53, 53a: Male thread section 54: First lumen 58: Large diameter section 59, 69: Locking thread section 60: Lock member 62: Elastic member 64: Pressing section 66: Grip section 68: Connection section 70: Penetrating catheter 72: Shaft 74: Distal tip 80: Guiding catheter 82: Sheath 84: Space 90, 90a: Connector 92, 92a: Hollow section 94, 94a: Water supply port 100, 100a: Catheter holder

Claims (7)

A medical device holder,
A cylindrical holding member having a first lumen and capable of holding an elongated medical device inserted into the first lumen, the holding member having a first helical thread portion formed around an axis of the holding member;
A cylindrical support member is disposed coaxially with the holding member, communicates with the first lumen, and has a second lumen into which the medical device is inserted. The support member has a second threaded portion formed helically around the axis of the support member and threadedly engaged with the first threaded portion.
Equipped with
The holding member is configured to advance relative to the support member by rotating the holding member in a first direction relative to the support member, and to retreat relative to the support member by rotating the holding member relative to the support member in a second direction opposite to the first direction ,
The holding member is
an elastic member in contact with an outer peripheral surface of the medical device;
a base member of the elastic member that contacts one surface of the first lumen in the axial direction;
a locking member that contacts the other axial surface of the first lumen among the elastic members, the locking member having a connecting portion that connects to the base member when the elastic member is sandwiched between the base member and the locking member and elastically deformed to press against the outer peripheral surface of the medical device . The medical device holder according to claim 1,
the support member has an accommodation hole that communicates with the first lumen and is capable of accommodating at least a part of the holding member, and the second thread portion is formed on an inner circumferential surface of the support member that constitutes the accommodation hole,
The first threaded portion is formed on at least a part of an outer circumferential surface of the holding member.
Medical device holder. The medical device holder according to claim 2,
The second lumen is formed on a distal end side of the support member, and the receiving hole is formed on a proximal end side of the support member,
The at least one portion of the holding member includes a distal end portion of the holding member, and a grip portion is provided on the holding member on a proximal side of the first thread portion.
Medical device holder. The medical device holder according to any one of claims 1 to 3,
At least one of the holding member and the support member is provided with a stopper portion that limits the number of rotations of the holding member in a direction in which the holding member advances relative to the support member to a predetermined number of times.
Medical device holder. The medical device holder according to any one of claims 1 to 4,
The axial length of the second lumen in the support member is shorter than the axial length of the first lumen in the retention member.
Medical device holder. A hollow shaft;
6. The medical device holder according to claim 1, wherein a proximal end of the shaft is attached to the support member; and
A catheter comprising: A catheter comprising a hollow shaft and a medical device holder,
The medical device holder includes:
A cylindrical holding member having a first lumen and capable of holding an elongated medical device inserted into the first lumen, the holding member having a first helical thread portion formed around an axis of the holding member;
a cylindrical support member arranged coaxially with the holding member, communicating with the first lumen, and having a second lumen into which the medical device is inserted, the support member having a second threaded portion formed helically around the axis of the support member and threadably engaging with the first threaded portion;
The holding member is configured to advance relative to the support member by rotating the holding member in a first direction relative to the support member, and to retreat relative to the support member by rotating the holding member relative to the support member in a second direction opposite to the first direction,
The shaft is
a connector provided on the base end side of the shaft, the connector having a hollow portion to which the tip portion of the support member is detachably attached and a water supply port formed therein that communicates with the second lumen and that penetrates the hollow portion from the outside;
Catheter.

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