JP2012050490A - Wire operation device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a wire operation device in which fine wire operation is possible, a guide wire does not come off despite unlinking hands, and both catheter operation and the wire operation can be done by one surgeon.SOLUTION: The wire operation device 10A can be connected to the proximal end part of the catheter hub 6 at one end part thereof and has the expandable part 12 which can expand and constrict and the wire material holder 14 connected to the other end part of the expandable part 12 rotatably to the expandable part 12 and capable of holding the guide wire 2. The expandable part 12 has the bellows member 20 for example.

Description

  The present invention relates to a wire rod manipulation device for manipulating a wire rod (guide wire) used for guiding a catheter when the catheter is inserted into the body.

  In order to insert a catheter into the body, a guide wire, which is a wire, is first inserted, and then the catheter is inserted into the body using the guide wire as a guide. After inserting this catheter to the target site, the guide wire is removed and a procedure such as contrast or treatment is performed. In such a procedure, the guide wire needs to be rotated, pushed or pulled by the hand in the process of insertion into the body. In order to facilitate the operation of such a guide wire, the following Patent Document 1 proposes an operating instrument that can be manually gripped and can operate the rotation and the movement in the axial direction while holding the guide wire.

Japanese Patent No. 2521181

  By the way, in the treatment of a catheter, it is required to insert the catheter into a target blood vessel. For this reason, a guide wire is inserted into a thinly meandering blood vessel. However, if a load is applied to the blood vessel by a slight operation, there is a possibility of causing a spasm, and considerable care is required for the operation of the guide wire. In particular, the use of guidewires with hydrophilic coatings to improve the smoothness of movement in blood vessels has been increasing recently. Subtle operations are required.

  Further, when a guide wire that is slippery in a blood vessel is used, there is a concern that the guide wire may come off if the hand is released after the guide wire is inserted into the target site.

  Furthermore, in recent years, a single operator may operate both a catheter and a guide wire in order to perform an operation with a smaller number of people. However, in a case where the blood vessel meanders severely and the target site is located in the periphery. Performing both operations by one person can be quite difficult.

  Such a problem exists, for example, in the treatment of liver cancer, head aneurysm, coronary artery stenosis and the like that require delicate wire operations.

  The present invention has been made in consideration of such problems, and can perform delicate wire operations. The guide wire does not come out even when the hand is released, and both the catheter operation and the wire operation are performed by the operator 1. An object of the present invention is to provide a wire rod manipulation device that can be easily performed by a person.

  In order to achieve the above object, the present invention provides a wire rod manipulation device for manipulating a wire rod used for guiding a catheter when the catheter is inserted into a body, wherein one end portion is a base of a catheter hub. Connectable to an end, and includes a telescopic part that can be stretched and a wire rod holder that is connected to the other end of the telescopic part so as to be rotatable with respect to the telescopic part and can hold the wire. It is characterized by that.

  According to said structure, since a wire holding tool is connected to a catheter hub via an expansion-contraction part, even if a hand is released from a wire holding tool, a wire does not come out from a catheter. For this reason, it is convenient for the operator. In addition, when the wire holder is moved in the axial direction by the action of the expansion / contraction part, the wire can be pushed and pulled, and the wire holder can be rotated with respect to the expansion / contraction part, so the wire is rotated by the rotation of the wire holder. be able to. Thereby, the fine adjustment of the axial direction and rotation direction of a wire can be easily performed with one hand.

  In the above-described wire rod operating device, the expansion / contraction part may have an insertion space through which the wire rod is inserted. If comprised in this way, since an internal wire is protected by the expansion-contraction part, a wire does not touch a hand and operativity can be improved.

  In the above-described wire rod operating device, it is preferable that the stretchable part can hold the length after the stretch adjustment. If comprised in this way, even if it takes a hand off a wire holding tool, since a wire does not move to an axial direction, the front-end | tip position of a wire can be hold | maintained.

  In the above-described wire rod operating device, the stretchable part may have a bellows part. If comprised in this way, since a bellows part will deform | transform easily, when an operator has, it will be easy to adjust to a hand, a favorable fitting feeling will be obtained, and operativity will improve.

  Said wire rod operation device WHEREIN: It is good to have the cylindrical protector which prevents that the said bellows part bends in a radial direction in the hollow part of the said bellows part. If comprised in this way, it will become difficult for a bellows part to contact a wire, and it can suppress that a wire is damaged.

  In the above-described wire rod operating device, the protector includes a first member fixed to a distal end side of the stretchable portion, and a second member fixed to a proximal end side of the stretchable portion, and the first member; One of the second members may be inserted into the other so as to be relatively displaceable in the axial direction. If comprised in this way, since the bending of a radial direction is prevented over the full length of a bellows part in the state which the bellows part was extended, it can prevent that a wire rod is damaged, without a bellows part contacting a wire.

  In the above-described wire rod operating device, the expansion / contraction part may include a telescopic mechanism in which a plurality of similar cylindrical members having different sizes are connected so as to be relatively movable in the axial direction. Since the telescopic mechanism can insert the wire into the hollow portion, the wire does not touch the hand during operation. And since it is a structure which is not bent, an expansion-contraction part does not contact a wire, and it can prevent that a wire is damaged. It is suitable as a constituent member of the stretchable part.

  According to the wire rod operating device of the present invention, a delicate wire operation is possible, the guide wire does not come out even if the hand is released, and both the catheter operation and the wire operation can be easily performed by one operator. Is possible.

It is a whole perspective view of the wire operation device concerning a 1st embodiment of the present invention. It is sectional drawing which follows the axial direction of the wire rod operation device shown in FIG. It is a figure explaining the usage method of a wire operating device. It is sectional drawing which follows the axial direction of the wire operation device provided with the expansion-contraction part which concerns on a 1st modification. FIG. 5A is a cross-sectional view showing a state in which the expansion / contraction part is extended in the wire rod operation device including the expansion / contraction part according to the second modification, and FIG. 5B is a wire rod operation device including the expansion / contraction part according to the second modification. It is sectional drawing which shows the state which the expansion-contraction part shrunk in. FIG. 6A is a cross-sectional view showing a state in which the expansion / contraction part is extended in the wire rod operation device including the expansion / contraction part according to the third modification, and FIG. 6B is a wire rod operation device including the expansion / contraction part according to the third modification. It is sectional drawing which shows the state which the expansion-contraction part shrunk in. It is sectional drawing which shows one structural example of the engagement structure of a 1st member and a 2nd member. 8A is a cross-sectional view showing another configuration example of the engagement structure of the first member and the second member, and FIG. 8B is a cross-sectional view taken along the line VIIIB-VIIIB in FIG. 8A. It is a whole perspective view of the wire operation device concerning a 2nd embodiment of the present invention. It is sectional drawing which follows the axial direction of the wire rod operation device which concerns on 3rd Embodiment of this invention.

  DESCRIPTION OF EMBODIMENTS Hereinafter, preferred embodiments of a wire rod operating device according to the present invention will be described with reference to the accompanying drawings.

[First Embodiment]
FIG. 1 is an overall perspective view of a wire rod operating device 10A according to the first embodiment of the present invention. FIG. 2 is a cross-sectional view taken along the axial direction of the wire rod operating device 10A. In addition, regarding the wire rod operating device 10A and its constituent elements (constituent members), the Z direction shown in each drawing is referred to as an axial direction, in particular, the Z1 direction is referred to as a distal end side (front side), and the Z2 direction is referred to as a proximal end side (rear side) ). Therefore, regarding each component, “tip portion” means an end portion on the Z1 side, and “base end portion” or “rear end portion” means an end portion on the Z2 side.

  The wire rod operation device 10A is for manipulating a guide wire (wire rod) 2 used for guiding the catheter 4 when the catheter 4 (see FIG. 3) is inserted into the body. As shown in FIGS. 1 and 2, the wire rod operating device 10 </ b> A includes a stretchable portion 12 and a wire rod holder 14 connected to the base end portion of the stretchable portion 12.

  The stretchable part 12 has a hollow structure over its entire length, and has an insertion space through which the guide wire 2 is inserted. The expansion / contraction part 12 can be connected to the proximal end part of the catheter hub 6 (see FIG. 3) at one end part (distal end part), and is configured to be extendable / contractible. In the first embodiment, the expansion / contraction part 12 includes a front end connection part 16, a rear end connection part 18, and a bellows member 20 provided between the front end connection part 16 and the rear end connection part 18.

  A hole 16a is provided along the axial direction inside the tip connecting portion 16, and a tapered portion 16b is formed at a location near the tip of the tip connecting portion 16. The tapered portion 16 b is fitted inside the proximal end portion of the catheter hub 6, so that the stretchable portion 12 can be connected to the proximal end portion of the catheter hub 6.

  The bellows member 20 includes a first end portion 22 fixed to the front end connection portion 16 by adhesion, a second end portion 24 fixed to the rear end connection portion 18 by adhesion, etc., a first end portion 22 and a second end portion. A bellows portion 26 that can expand and contract with the end portion 24 is formed. The first end portion 22, the second end portion 24, and the bellows portion 26 are integrally formed of a flexible resin member, for example.

  In FIG. 2, the first end portion 22 is inserted and fixed to the proximal end side of the distal end connection portion 16, and the second end portion 24 is inserted and fixed to the distal end side of the rear end connection portion 18. Yes. The bellows portion 26 is configured by alternately arranging peaks and valleys in the axial direction. The bellows member 20 configured in this manner is extendable and contractible, and the overall length can be changed stepwise.

  As will be described later, since the wire rod operating device 10A is used in such a manner that the wire rod holder 14 is held with the index finger and the thumb and the tip connection portion 16 is supported with the little finger, the bellows member is suitable for such use. The length of the stretchable part 12 including 20 is set to about 5 mm to 150 mm, preferably about 50 mm to 70 mm.

  The rear end connecting portion 18 includes a first forming member 28 that holds the second end portion 24 of the bellows member 20, and a second forming member 30 that is fixed to the rear end portion of the first forming member 28. The first forming member 28 is provided with an annular protrusion 32 that protrudes radially inward, and the second forming member 30 is provided with an annular protrusion 34 that protrudes radially inward. An annular recess 36 is formed between the portions 32 and 34.

  Unlike the bellows member 20, the front end connection portion 16 and the rear end connection portion 18 do not need to have flexibility, and may be made of a resin member (for example, polycarbonate) that is harder than the bellows member 20.

  The wire rod holder 14 includes a head portion 38, a chuck member 40 accommodated in the head portion 38, and an operation grip 42 that is screwed into the head portion 38. A cylindrical member 44 is provided at the front end of the head portion 38 and is held by the rear end connecting portion 18 so as to be rotatable about the axis. A flange 46 protruding outward in the radial direction is provided on the outer peripheral portion of the distal end of the cylindrical member 44. The flange portion 46 is engaged with the above-described annular recess 36 provided in the rear end connection portion 18, thereby restricting relative movement in the axial direction with respect to the rear end connection portion 18, and Centered rotation is allowed.

  The head portion 38 and the cylindrical member 44 are fixed by, for example, adhesion. Inside the head portion 38, a parallel hole portion 48 provided on the distal end side along the axis, and a tapered hole portion provided adjacent to the proximal end side of the parallel hole portion 48 and expanding in diameter toward the proximal end side. 50 and a female screw portion 52 provided adjacent to the proximal end side of the tapered hole portion 50.

  The chuck member 40 is formed by integrally forming a chuck head 54 and a guide cylinder 56 provided on the base end side thereof, and an axial hole 58 is provided therein. A part of the chuck head 54 and the guide tube 56 is divided into a plurality (for example, four) in the circumferential direction by one or a plurality of slits (not shown) provided in the axial direction. The portion constitutes a holding portion for holding the guide wire 2. In FIG. 2, the clamping portion is loosened and is larger than the outer diameter of the guide wire 2.

  A tapered portion 54 a that contacts the tapered hole portion of the head portion 38 is provided on the outer periphery of the tip of the chuck head 54. The outer diameter of the guide cylinder 56 is smaller than the outer diameter of the chuck head 54.

  A hole 60 in the axial direction is provided inside the operation grip 42, and the guide cylinder 56 of the chuck member 40 is inserted into the hole 60. The operation grip 42 includes a grip main body 62 and a small diameter portion 64 having a smaller diameter than the grip main body 62, and an outer peripheral portion of the small diameter portion 64 is provided with a female screw portion 52 provided in the chuck member 40. A male thread portion 66 to be screwed is provided.

  The grip body 62 is mainly a place where the operator grips during operation, and has a length and a diameter suitable for operations such as pushing, pulling, and rotating. It is preferable to perform a delicate rotation operation.

  In order to hold the guide wire 2 by the wire rod holder 14 configured as described above, the guide wire 2 is inserted into the wire rod holder 14 with the chuck head 54 loosened, and the operation grip 42 is moved to the head portion at a desired position. The screw 38 is rotated in the direction in which the screw is tightened. Then, the tip end portion of the small diameter portion 64 of the operation grip 42 pushes the chuck head 54 forward, whereby the chuck head 54 divided in the circumferential direction is pressed in the inner diameter direction, and the guide wire 2 is clamped by the chuck head 54. .

  Note that the wire rod holder 14 applicable to the present invention is not limited to the configuration shown in FIG. 2, and the guide wire 2 can be held at a desired position so that the guide wire 2 can be pushed and pulled and rotated. If it is.

  The wire rod operating device 10A according to the first embodiment of the present invention is basically configured as described above, and the method of use thereof will be described below together with the operation and effects thereof.

  First, the guide wire 2 is passed through the catheter 4, and the distal end of the guide wire 2 is set in a state where it is arbitrarily extended from the distal end of the catheter 4. Next, the wire manipulating device 10 </ b> A is passed from the rear end of the guide wire 2 with the chuck head 54 loosened, and the distal end connecting portion 16 is fitted to the catheter hub 6. In this state, the operation grip 42 is rotated with respect to the head portion 38 to clamp the guide wire 2 at a predetermined position.

  Thereafter, the operator appropriately holds the wire rod holder 14 of the wire rod operation device 10A, and rotates, pushes, or pulls the guide wire 2 so that the guide wire 2 and the catheter 4 are placed at predetermined positions in the body. Insert. In this case, as shown in FIG. 3, for example, the wire holder 14 is grasped by the index finger and the thumb, the distal end connection portion 16 or the catheter hub 6 is supported by the little finger, and the expansion / contraction portion 12 (the bellows member 20) is supported by the middle finger and the ring finger. The wire-manipulating device 10A is gripped in a supporting manner.

  In this state, when the wire rod holder 14 is rotated with the index finger and thumb, torque is transmitted to the guide wire 2 held by the wire rod holder 14 and the guide wire 2 rotates. Moreover, since the expansion / contraction part 12 can be expanded-contracted, the front-end | tip position of the guide wire 2 can be changed by moving the wire rod holder 14 close to or away from the catheter hub 6. In this case, since the bellows member 20 can be adjusted in length in steps and can be adjusted in length, fine adjustment during the push-pull operation of the guide wire 2 can be easily performed.

  Moreover, the wire rod operating device 10A can easily perform the operation of pushing, pulling, and rotating the guide wire 2 with one hand, as shown in FIG. For this reason, the operator who is operating the guide wire 2 can operate the catheter 4 with the other hand. That is, both the operation of the catheter 4 and the operation of the guide wire 2 can be easily performed by one operator.

  Further, since the wire rod operating device 10A is used while being connected to the catheter hub 6, the guide wire 2 does not come out of the catheter 4 even if the hand is released. For this reason, it is convenient for the operator.

  In this embodiment, since the expansion / contraction part 12 has a hollow structure and has an insertion space through which the guide wire 2 is inserted, the guide wire 2 does not touch the hand when the guide wire 2 is operated. Therefore, the operability of the guide wire 2 can be improved.

  Since the stretchable part 12 is configured by the bellows member 20 that is easily deformed, when the operator grips the wire rod operation device 10A, the stretchable part 12 is easily familiar to the hand, a good fit is obtained, and the operability can be improved.

  As with the expansion / contraction part 12a according to the first modification shown in FIG. 4, the outer peripheral surface of the distal end connection part 16 (the distal end part of the expansion / contraction part 12 or its vicinity) is on the outer side for hooking the operator's finger. A projecting protrusion 70 may be provided. As shown in FIG. 3, when the wire rod operating device 10A is operated with one hand, the tip connecting portion 16 is supported by the palm and the little finger, so that the protrusion 70 has a size and shape suitable for hanging the little finger. It should be set. A plurality of protrusions 70 may be provided along the circumferential direction, but it is only necessary to be provided at one place on the outer periphery of the tip connection portion 16 in consideration of placing a little finger. The protrusion 70 may be provided at the proximal end portion of the catheter hub 6 instead of being provided at the distal end connecting portion 16.

  FIG. 5A is a cross-sectional view illustrating a state in which the expansion / contraction part 12b is extended in the wire rod operating device 10A including the expansion / contraction part 12b according to the second modification, and FIG. 5B includes the expansion / contraction part 12b according to the second modification. It is sectional drawing which shows the state which the expansion-contraction part 12b shrunk in 10 A of wire operation devices.

  The expansion / contraction part 12b according to the second modification corresponds to a structure in which a protector 72 is added to the expansion / contraction part 12 shown in FIG. When the wire rod operating device 10A is operated with one hand, the bellows portion 26 is pressed from the outside in the radial direction by the palm or finger and bent, so that the inside of the bellows portion 26 may contact the guidewire 2 and damage the guidewire 2 There is. Therefore, the expansion / contraction part 12b according to the second modification has a cylindrical protector 72 that prevents the bellows part 26 from bending in the radial direction in the hollow part of the bellows part 26. Providing such a protector 72 makes it difficult for the bellows portion 26 to come into contact with the guide wire 2 and suppresses the guide wire 2 from being damaged.

  The protector 72 has an outer surface at one end (Z1 side end) fixed to the inner surface of the tip connection portion 16 by bonding or the like, and the other end (Z2 side end) is a free end. There is a space between the outer surface of the protector 72 and the inner surface of the bellows portion 26. For this reason, when the wire rod operating device 10 </ b> A is picked up, the space between the protector 72 and the bellows part 26 is buffered, and the bellows part 26 can be prevented from directly pressing the guide wire 2.

  Since the length of the protector 72 in the axial direction is shorter than that of the bellows member 20, the extendable portion 12b has the other end portion inside the rear end connecting portion 18 (specifically, an annular convex portion as shown in FIG. 5B). It can be shrunk to a position where it abuts against the part 32). The protector 72 in the illustrated example is cylindrical, but may be a non-circular (elliptical, polygonal, etc.) cylinder. Further, the protector 72 may be a rod-like member elongated in the axial direction, a tubular spiral member, or a stitch-like member, instead of a cylindrical body. For example, the length of the protector 72 is preferably set to about one third to one third of the length of the bellows member 20. Thereby, it can suppress that the bellows part 26 contacts the guide wire 2, ensuring the expansion-contraction range of the expansion-contraction part 12b moderately. Further, the protector 72 may have the outer surface of the end portion on the Z2 side fixed to the inner surface of the rear end connecting portion 18 by adhesion or the like, and the end portion on the Z1 side may be a free end.

  FIG. 6A is a cross-sectional view illustrating a state in which the expansion / contraction part 12c is extended in the wire rod operating device 10A including the expansion / contraction part 12c according to the third modification, and FIG. 6B includes the expansion / contraction part 12c according to the third modification. It is sectional drawing which shows the state which the expansion-contraction part 12c shrunk in 10 A of wire rod operation devices.

  The expansion / contraction part 12c according to the third modification corresponds to a structure in which a protector 74 is added to the expansion / contraction part 12 shown in FIG. 2 for the same purpose as the expansion / contraction part 12b according to the second modification. Unlike the protector 72 shown in FIGS. 5A and 5B, the protector 74 includes a first member 76 and a second member 78. One end of the first member 76 (the end on the Z1 side) is fixed to the distal end side (specifically, the distal end connecting portion 16) of the expandable portion 12c by bonding. The second member 78 has one end (the end on the Z2 side) fixed to the base end side (specifically, the rear end connecting portion 18) of the expandable portion 12c by bonding.

  In the illustrated example, the outer diameter of the second member 78 is set to be substantially the same as or slightly smaller than the inner diameter of the first member 76, and the second member 78 is inserted into the first member 76 so as to be capable of relative displacement in the axial direction. Has been. The first member 76 may be inserted into the second member 78 by reversing the magnitude relationship between the first member 76 and the second member 78.

  The protector 74 configured in this manner prevents bending in the radial direction over the entire length of the bellows portion 26 in a state where the bellows portion 26 is extended, so that the guidewire is not in contact with the guidewire 2. 2 can be prevented from being damaged.

  When the length of the first member 76 and the second member 78 is set so that one of the first member 76 and the second member 78 is inserted into the other while the bellows member 20 is extended to the maximum. It is not necessary to provide a stopper for preventing the other of the first member 76 and the second member 78 from coming off. On the other hand, if the bellows member 20 is extended to the maximum, and there is no such stopper, the first member 76 and the second member 78 have a length that allows one of the first member 76 and the second member 78 to be removed from the other. When the length of the two members 78 is set, it is preferable to provide a stopper 80 as shown in FIG.

  The stopper 80 includes an annular inner circumferential protrusion 80 a provided at the rear end of the first member 76 and projecting radially inward, and an annular outer periphery projecting radially outward provided at the tip of the second member 78. It consists of convex part 80b. Since the first member 76 and the second member 78 are not separated from each other by such a stopper 80, the insertion state of the first member 76 and the second member 78 can be reliably maintained. Bending can be reliably prevented.

  In order to prevent relative rotation between the first member 76 and the second member 78, the engagement structure shown in FIGS. 8A and 8B may be employed. 8A and 8B, a guide protrusion 82a protruding radially inward is provided at the rear end of the first member 76, and a guide protrusion 82a is provided on the outer periphery of the second member 78 along the axial direction. A guide groove 82b to be inserted is formed. The guide protrusion 82a and the guide groove 82b constitute a linear guide structure 82 that prevents relative rotation around the axis of the first member 76 and the second member 78.

  In the illustrated example, a total of two guide projections 82a are provided at each position that is 180 degrees out of phase in the circumferential direction, and the guide groove 82b is provided at a circumferential position corresponding to each guide projection 82a in the second member 78. ing. Note that the guide protrusions 82a and the corresponding guide grooves 82b are not limited to two in the circumferential direction, and may be one or three or more.

  By providing such a linear guide structure 82, it is possible to prevent the extension / contraction part 12c from being twisted. Therefore, the elastic part 12c can be protected and the durability of the elastic part 12c can be improved. Further, even if the wire rod holder 14 of the wire rod operation device 10A is rotated, the stretchable portion 12c is not twisted, so that the operability can be improved.

  8A and 8B, an annular convex portion 78a that protrudes radially outward is provided at the tip of the second member 78. When the bellows member 20 is extended, the annular convex portion 78a serves as a stopper. Since it functions, the 1st member 76 and the 2nd member 78 do not isolate | separate from each other, but the insertion state of the 1st member 76 and the 2nd member 78 can be hold | maintained reliably.

[Second Embodiment]
FIG. 9 is an overall perspective view of a wire rod operating device 10B according to the second embodiment of the present invention. Note that, in the wire rod operating device 10B according to the second embodiment, elements having the same or similar functions and effects as those of the wire rod operating device 10A according to the first embodiment are denoted by the same reference numerals, and detailed description is given. Omitted.

  A wire rod operation device 10B according to the second embodiment has a configuration in which the bellows member 20 in the wire rod operation device 10A according to the first embodiment shown in FIGS. That is, the expansion / contraction part 83 of the wire rod operating device 10B includes the front end connection part 16, the rear end connection part 18, and the shape holding member 84 provided therebetween. The shape holding member 84 is configured to expand and contract in the Z direction by plastic deformation, and is configured to be able to hold the shape after the deformation, and is formed in a spiral shape. Such a shape holding member 84 is formed by spirally shaping a resin material (for example, polyethylene, polyolefin, etc.) or a metal material configured to be easily plastically deformed.

  Also with the wire rod operating device 10B configured as described above, the wire rod holder 14 is connected to the catheter hub 6 (see FIG. 3) via the telescopic portion 83, similarly to the wire rod device 10A according to the first embodiment. Therefore, the guide wire 2 does not come out of the catheter 4 even if the hand is released from the wire rod holder 14. For this reason, it is convenient for the operator. Further, when the wire rod holder 14 is moved in the axial direction by the action of the telescopic portion 83, the guide wire 2 can be pushed and pulled, and the wire rod holder 14 is rotatable with respect to the telescopic portion 83, so that the wire rod holder 14 can be rotated. The guide wire 2 can be rotated by the rotation. Thereby, the fine adjustment of the axial direction and rotation direction of the guide wire 2 can be easily performed with one hand.

  The shape holding member 84 is formed in a spiral shape, and an insertion space into which the guide wire 2 is inserted is formed. For this reason, when the expansion / contraction part 83 is gripped, the hand does not touch the guide wire 2 and the operability can be improved. Furthermore, since the shape holding member 84 is easily deformed, it is easy to adjust to the hand when held by the operator, a good fit is obtained, and the operability is improved.

  In addition, you may provide the protrusion 70 for hooking shown in FIG. 4 in the front-end | tip connection part 16 of the wire rod operation device 10B. In the second embodiment, for each component common to the first embodiment, the same operation and effect as those provided by the common component in the first embodiment can be obtained. is there.

[Third Embodiment]
FIG. 10 is an overall perspective view of a wire rod operating device 10C according to the third embodiment of the present invention. In addition, in the wire rod operating device 10C according to the third embodiment, elements having the same or similar functions and effects as those of the wire rod operating device 10A according to the first embodiment are denoted by the same reference numerals, and detailed description thereof will be given. Omitted.

  A wire rod operation device 10C according to the third embodiment has a configuration in which the bellows member 20 in the wire rod operation device 10A according to the first embodiment illustrated in FIGS. 1 and 2 is replaced with a telescopic mechanism 86. That is, the expansion / contraction part 85 of the wire rod operating device 10 </ b> C includes the front end connection part 16, the rear end connection part 18, and a telescopic mechanism 86 that is extendable and retractable provided therebetween.

  The telescopic mechanism 86 has a structure in which a plurality of similar cylindrical members having different sizes are connected so as to be relatively movable in the axial direction. The telescopic mechanism 86 of the illustrated example includes a cylindrical first cylinder 88, a second cylinder 90, and a third cylinder 92 in order from the distal end side to the proximal end side of the wire rod operation device 10C. The first cylindrical body 88, the second cylindrical body 90, and the third cylindrical body 92 may be made of, for example, a resin member having such a rigidity that hardly elastically deforms when held by an operator.

  An annular outer convex portion 88a projecting radially outward provided at the proximal end portion of the first cylindrical body 88, and an annular inner portion projecting radially inward provided at the distal end portion of the second cylindrical body 90 The convex portion 90a constitutes a stopper for preventing the first cylinder 88 and the second cylinder 90 from coming off. In addition, an annular outer convex portion 90 b that protrudes outward in the radial direction provided at the base end portion of the second cylindrical body 90, and an annular shape that protrudes inward in the radial direction provided at the distal end portion of the third cylindrical body 92. The inner convex portion 92a constitutes a stopper for preventing the second cylindrical body 90 and the third cylindrical body 92 from coming off.

  In order to prevent relative rotation of the first cylinder 88, the second cylinder 90, and the third cylinder 92, a rotation prevention mechanism similar to the linear guide structure 82 shown in FIGS. 8A and 8B may be provided. The first cylinder 88, the second cylinder 90, and the third cylinder 92 are not limited to a cylindrical shape, and may be formed as non-circular (elliptical, polygonal, etc.) cylinders. When the first cylinder 88, the second cylinder 90, and the third cylinder 92 are formed as non-circular cylinders, the first cylinder 88 and the second cylinder 90 are provided without providing the above-described rotation prevention mechanism. And the relative rotation of the 3rd cylinder 92 is prevented. Note that the number of cylinders constituting the telescopic mechanism 86 is not limited to three, and may be two or four or more.

  Also with the wire rod operating device 10C configured as described above, the wire rod holder 14 is connected to the catheter hub 6 (see FIG. 3) via the telescopic portion 85, similarly to the wire rod manipulating device 10A according to the first embodiment. Therefore, the guide wire 2 does not come out of the catheter 4 even if the hand is released from the wire rod holder 14. For this reason, it is convenient for the operator. Further, when the wire rod holder 14 is moved in the axial direction by the action of the expansion / contraction section 85, the guide wire 2 can be pushed and pulled, and the wire rod holder 14 is rotatable with respect to the expansion / contraction section 85, so that the wire rod holder 14 can be rotated. The guide wire 2 can be rotated by the rotation. Thereby, the fine adjustment of the axial direction and rotation direction of the guide wire 2 can be easily performed with one hand.

  The sliding resistance between the first cylinder 88 and the second cylinder 90 and between the second cylinder 90 and the third cylinder 92 is such that the telescopic mechanism 86 can be easily expanded and contracted by the operation of the operator. It is preferable to set the sliding resistance to such an extent that the length after stretching can be maintained even if the hand is released. Thereby, even if the hand is released from the wire rod holder 14, the guide wire 2 does not move in the axial direction, so that the tip position of the guide wire 2 can be held.

  The telescopic mechanism 86 has a hollow structure, and an insertion space into which the guide wire 2 is inserted is formed. For this reason, when the expansion / contraction part 85 is gripped, the hand does not touch the guide wire 2 and the operability can be improved.

  Furthermore, unlike the bellows member 20 shown in FIG. 2 and the like, the telescopic mechanism 86 does not bend in the radial direction even when the operator grips it, so that the telescopic mechanism 86 does not contact the guide wire 2, It is possible to prevent the guide wire 2 from being damaged.

  In addition, you may provide the protrusion 70 for hooking shown in FIG. 4 in the front-end | tip connection part 16 of 10 C of wire rod operation devices. In the third embodiment, with respect to each component common to the first embodiment, the same operation and effect as those provided by the common component in the first embodiment can be obtained. is there.

  In the above description, the present invention has been described with reference to preferred embodiments. However, the present invention is not limited to the above-described embodiments, and various modifications can be made without departing from the scope of the present invention. Needless to say.

10A, 10B, 10C ... Wire rod operation devices 12, 12a, 12b, 12c, 83, 85 ... Stretchable portion 14 ... Wire rod holder 16 ... Tip connection portion 18 ... Rear end connection portion 20 ... Bellows member 26 ... Bellows portion 72, 74 ... Protector 76 ... First member 78 ... Second member 80 ... Stopper 82 ... Linear guide structure 86 ... Telescopic mechanism

Claims (7)

A wire rod manipulation device for manipulating a wire rod used for guiding the catheter when inserting the catheter into the body,
One end can be connected to the proximal end of the catheter hub,
A wire rod holder connected to the other end portion of the stretchable portion so as to be rotatable with respect to the stretchable portion, and capable of holding the wire.
A wire operation device characterized by that. The wire rod operating device according to claim 1,
The expansion / contraction part has an insertion space through which the wire is inserted,
A wire operation device characterized by that. In the wire operation device according to claim 1 or 2,
The stretchable part can hold the length after stretch adjustment,
A wire operation device characterized by that. In the wire rod operation device according to any one of claims 1 to 3,
The stretchable part has a bellows part,
A wire operation device characterized by that. The wire rod operating device according to claim 4,
In the hollow portion of the bellows portion, it has a cylindrical protector that prevents the bellows portion from bending in the radial direction.
A wire operation device characterized by that. The wire rod operating device according to claim 5,
The protector includes a first member fixed to a distal end side of the stretchable part, and a second member fixed to a proximal end side of the stretchable part,
One of the first member and the second member is inserted into the other so as to be capable of relative displacement in the axial direction.
A wire operation device characterized by that. In the wire rod operation device according to any one of claims 1 to 3,
The telescopic part has a telescopic mechanism in which a plurality of similar cylindrical members having different sizes are connected so as to be relatively movable in the axial direction.
A wire operation device characterized by that.

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