HK1176321A1 - Catheter - Google Patents

Abstract

The disclosed catheter is equipped with: a tubular member (4); a leaf spring (30) that is provided to the inner part of the tubular member (4) such that at least part of the side edges (30e, 30f) that run along the axial direction of the tubular member (4) are embedded in the tubular member (4); and multiple tubes (41-46), which each form multiple paths (31-36) that are each provided to a first region (20A) on one main surface (30a) of the leaf spring (30) and to a second region (20B) on the other main surface (30b) of the leaf spring (30) in the inner part of the tubular member (4) and which include paths (31, 32) for operating wires to pass through. In addition, in the first region (20A) and in the second region (20B), some tubes (43-46) are provided such that said tubes are in contact with the main surfaces (30a, 30b) of the leaf spring (30).

Description

Probe needle

Technical Field

The present invention relates to a probe. More specifically, the present invention relates to a probe that can be easily changed in the direction near the distal end inserted into a body cavity by operating an operation unit disposed on the proximal end side outside the body.

Background

A probe such as an electrode probe inserted into the heart through a blood vessel is deflected in the direction of the distal end (distal end) of the probe inserted into the body by operating an operation unit attached to the proximal end (distal end or proximal end) of the probe disposed outside the body. As a mechanism for deflecting the distal end of the probe, for example, patent document 1 discloses a mechanism including a leaf spring and two operation wires arranged on both sides of the leaf spring with the leaf spring interposed therebetween, and deflecting the distal end in two directions by pulling the operation wires. When the distal end is deflected by using the plate spring, the planarity of the bent portion of the probe can be improved.

Patent documents: japanese patent laid-open No. 2008-2452766

In a conventional probe including a leaf spring, the leaf spring is freely inserted into a lumen extending in an axial direction of the probe in a tubular member. The proximal end of the leaf spring is fixed to a tubular member or the like by bonding or the like. In such a configuration, it is considered that the distal end of the leaf spring may twist with respect to the tubular member when the operation wire is pulled to bend the leaf spring. Therefore, the conventional probe has room for improvement in torsional rigidity.

Disclosure of Invention

The present invention has been made in view of the above problems, and an object thereof is to provide a technique capable of further improving the torsional rigidity of a probe having a leaf spring.

One embodiment of the present invention is a probe. The probe is characterized by comprising: a tubular member; a leaf spring provided inside the tubular member such that at least a part of one end portion thereof in the axial direction of the tubular member is embedded in the tubular member; and a plurality of passages provided in the tubular member in a first region on one main surface side of the plate spring and a second region on the other main surface side of the plate spring, respectively, and including a passage for inserting an operation wire.

According to this aspect, the torsional rigidity of the probe including the plate spring can be further improved.

In the probe of the above aspect, the end portion of the plate spring may be embedded in the tubular member over the entire axial region of the tubular member. In addition, the probe may include a plurality of tube portions for forming the plurality of passages, respectively, and at least a part of the tube portions may be provided in contact with the main surface of the plate spring in the first region and the second region.

In the probe according to the above aspect, the plurality of tube portions may include at least two tube portions and one operation wire insertion tube portion, and the plurality of tube portions may be provided such that the two tube portions contact the main surface of the plate spring and the operation wire insertion tube portion is separated from the plate spring in the first region and the second region. In the first region and the second region, the two tube portions may be provided with the center line of the leaf spring in the axial direction of the probe interposed therebetween, and the tube portion for inserting the operation wire may be provided between the two tube portions.

In the first region and the second region, the operation wire insertion tube portion may be circumscribed to the two tube portions, and the plurality of tube portions may be arranged so as to be inscribed in a substantially circular shape centered on the central axis of the probe. In addition, the two tube portions may be provided separately from each other in the first region and the second region, and a member for adjusting the bendability of the probe may be inserted into at least one of the first region and the second region and a region surrounded by the two tube portions, the tube portion for inserting the operation wire, and the plate spring. The tubular member has a plurality of electrodes at a distal end region, which is a distal end region, and a plurality of lead wires for the electrodes are inserted into at least a part of the plurality of passages except for the passage for inserting the operation wire.

In addition, a probe in which the above-described elements are appropriately combined can be included in the scope of the invention claimed in the present patent application.

According to the present invention, the torsional rigidity of the probe having the plate spring can be further improved.

Drawings

Fig. 1 is a schematic side view of a probe according to embodiment 1.

Fig. 2 is a schematic plan view of the probe according to embodiment 1.

Fig. 3 is a schematic sectional view taken along line a-a of fig. 1.

Fig. 4 is a schematic perspective view of a cross section on the line B-B of fig. 2.

Fig. 5 is a sectional view taken along line C-C of fig. 1.

Fig. 6 is a schematic sectional view for explaining the arrangement of the tubes.

Detailed Description

Hereinafter, embodiments of the present invention will be described with reference to the drawings. In all the drawings, the same components are denoted by the same reference numerals, and detailed description thereof will be omitted as appropriate in the following description.

(embodiment mode 1)

The probe according to embodiment 1 is an electrode probe capable of performing tip deflection operation, and can be used for diagnosis or treatment of arrhythmia of the heart, for example. Fig. 1 is a schematic side view of a probe according to embodiment 1, and fig. 2 is a probabilistic plan view of the probe according to embodiment 1. Fig. 3 is a schematic sectional view taken along line a-a of fig. 1. In fig. 3, illustration of the plate spring 30 and the operation wires 50a and 50b is omitted.

As shown in fig. 1 and 2, the probe 2 according to embodiment 1 includes: a tubular member 4, a handle 6, a tip chip electrode 10, and a plurality of ring electrodes 12a to 12k (hereinafter, the ring electrodes 12a to 12k are collectively referred to as "ring electrodes 12" as appropriate).

The probe 2 includes a distal end chip electrode 10 and a ring electrode 12 at a distal end portion of the tubular member 4. The tip chip electrode 10 is fixed to the tubular member 4 with an adhesive, fusion bonding, or the like, for example. The ring-shaped electrodes 12a to 12k are fixed to the outer peripheral surface of the tubular member 4 by caulking a metal ring having a larger diameter than the outer diameter of the tubular member 4, for example. The number of the ring-shaped electrodes 12 is not particularly limited, and may be appropriately set according to the number of lead wires that can be inserted into the tubular member 4, and the like.

A handle 6 is mounted at the proximal end of the tubular member 4. Further, a pinch portion 7 for performing a deflecting operation (swing operation) of the distal end portion of the tubular member 4 is attached to the handle 6. The handle 6 and the pinch portion 7 constitute an operation portion.

As shown in fig. 3, the tubular member 4 is composed of an outer cylinder 4a having a single-chamber structure, and an inner cylinder 4b having a housing space 20 provided in a lumen of the outer cylinder 4 a. The inner tube 4b extends in a predetermined region from the distal end of the outer tube 4 a. The inner peripheral surface of the outer cylinder 4a and the outer peripheral surface of the inner cylinder 4b are fixed in close contact with each other. The outer cylinder 4a and the inner cylinder 4b can be fixed by means of adhesion, welding, or the like. As will be described later, a leaf spring and a plurality of passages (fig. 3 shows only the passages 31 and 32 (pipes 41 and 42)) are provided in the housing space 20 (see fig. 4 and 5). The tubular member 4 is preferably constructed in such a manner that the flexibility is relatively high near the distal end and relatively low near the proximal end. For example, the tubular member 4 has a structure in which a member I, a member II and a member III are joined, wherein the member I is disposed on the distal end side and has a Shore D hardness of 20 to 63; a member II which is disposed adjacent to the proximal end side of the member I, has a Shore D hardness of 45 to 72, and has a lower flexibility than the member I; and a member III which is disposed adjacent to the proximal end side of the member II, has a Shore D hardness of 55 to 80, and has a lower flexibility than the member II. In addition, the outer cylinder 4a and the inner cylinder 4b may be formed integrally with the tubular member 4. The outer cylinder 4a of the tubular member 4 may have a multilayer structure.

The main portion of the tubular member 4 is made of synthetic resin such as polyolefin, polyamide, polyether polyamide, and polyurethane. The tubular member 4 generally has an outer diameter of about 0.6 to 3mm and a length of about 500 to 1200 mm. In this embodiment, the tubular member 4 has an outer diameter of about 2.0mm and a length of about 1170 mm.

The front chip electrode 10 and the ring electrode 12 are made of a metal having good conductivity, such as aluminum, copper, stainless steel, gold, and platinum. In order to have a good contrast against X-rays, the tip chip electrode 10 and the ring electrode 12 are preferably made of platinum or an alloy thereof. The outer diameters of the tip chip electrode 10 and the ring electrode 12 are not particularly limited, but are preferably about the same as the outer diameter of the tubular member 4, and are usually about 0.5 to 3 mm.

Fig. 4 is a schematic perspective view of a cross section on the line B-B of fig. 2. Fig. 5 is a sectional view taken along line C-C of fig. 1. As shown in fig. 4 and 5, the probe 2 of the present embodiment includes a plate spring 30 and a plurality of passages 31, 32, 33, 34, 35, and 36 inside a tubular member 4.

In the present embodiment, the plate spring 30 is accommodated in the accommodating space 20. The plate spring 30 is a plate-like body extending in the axial direction of the tubular member 4, and has two main surfaces 30a, 30b extending in the axial direction of the tubular member 4, and two side surfaces 30c, 30d extending in the axial direction of the tubular member 4. The leaf spring 30 has a distal end extending to the vicinity of the distal end of the tubular member 4, and a proximal end extending from the distal end of the tubular member 4 to a predetermined distance. The leaf spring 30 is provided in the housing space 20 so that end portions 30e and 30f on both sides in the axial direction of the tubular member 4 are embedded in the tubular member 4 (inner cylinder 4 b). Thus, the housing space 20 is divided into two areas. That is, the housing space 20 is divided into: a first region 20A on the side of one main surface 30A of the plate spring 30, and a second region 20B on the side of the other main surface 30B of the plate spring 30.

The term "end 30e and end 30f are embedded in the tubular member 4 (inner tube 4 b)" means that the side surfaces 30c and 30d of the plate spring 30 extending in the axial direction of the tubular member 4 and the regions of the two main surfaces 30a and 30b that contact the side surfaces 30c and 30d are in contact with the tubular member 4. In the present embodiment, the both end portions 30e and 30f of the plate spring 30 contact the inner wall of the inner tube 4b over the entire axial region. Thus, the leaf spring 30 is locked to the tubular member 4 over the entire length thereof, and therefore, the leaf spring 30 can be restrained from twisting with respect to the tubular member 4, which can be caused when the operation wire is operated. As a result, the torsional rigidity of the probe 2 can be increased, and the planarity of the bent portion of the probe 2 can be further improved. The range of the leaf spring 30 can be set as appropriate according to the length of the bending region of the probe 2.

A plurality of passages are provided in the first region 20A and the second region 20B partitioned by the plate spring 30, respectively. In the present embodiment, the first region 20A is provided with the passages 31, 33, 34, and the second region 20B is provided with the passages 32, 35, 36. The passage 31 provided in the first region 20A and the passage 32 provided in the second region 20B are used as a passage for inserting a wire for operation. The vias 33 and 34 provided in the first region 20A and the vias 35 and 36 provided in the second region 20B are used as vias for inserting a plurality of lead wires extending from the handle 6 and electrically connected to the tip chip electrode 10 and the ring electrode 12.

The passages 31 to 36 are formed by pipes 41, 42, 43, 44, 45, and 46 (pipe portions). That is, in the present embodiment, the plurality of tubes 41 to 46 having hollow portions are housed in the housing space 20, and the hollow portions of the plurality of tubes 41 to 46 respectively serve as the passages 31 to 36. The tubes 41 and 42 correspond to wire insertion tube portions for operation, respectively. The inner diameters of the tubes 41 and 42, i.e., the diameters of the passages 31 and 32, in the present embodiment are, for example, about 0.34mm, and the inner diameters of the tubes 43 to 46, i.e., the diameters of the passages 33 to 36, are, for example, about 0.45 mm.

An operation wire 50a is slidably inserted through the tube 41, and an operation wire 50b is slidably inserted through the tube 42. A partially spherical fixing portion (anchor) 52a having a larger diameter than the operation wire 50a is formed in the tube 41 at the distal end of the operation wire 50 a. A partially spherical fixing portion 52b having a larger diameter than the operation wire 50b is similarly formed in the tube 42 at the distal end of the operation wire 50 b. A recess 11 is formed inside the front-end chip electrode 10, and the recess 11 is filled with solder 62. The fixing portions 52a and 52b are embedded in the solder 62. Thus, the operation wires 50a and 50b are fixed to the solder 62 and the distal end chip electrode 10, and are connected to the vicinity of the distal end of the tubular member 4.

The proximal ends of the operation wires 50a and 50b are connected to the pinch portion 7 shown in fig. 1 and 2. Thus, the distal end of the probe 2 can be swung and deflected by operating the pinch portion 7 shown in fig. 1 and 2 and pulling the operation wires 50a and 50 b. In the present embodiment, the distal end of the probe 2 can be deflected in the direction of arrow D1 in fig. 2 by the pulling operation wire 50a, and the distal end of the probe 2 can be deflected in the direction of arrow D2 in fig. 2 by the pulling operation wire 50 b.

By providing the fixing portions 52a and 52b at the distal ends of the operation wires 50a and 50b in this manner, the operation wires 50a and 50b can be made less likely to be pulled out from the solder 62. This can improve the reliability of the operation of the probe 2. In the present embodiment, the operation wires 50a and 50b are fixed to the distal end chip electrode 10, but the present invention is not particularly limited thereto, and the distal ends of the operation wires 50a and 50b may be fixed to the tubular member 4 or the like.

A tip chip electrode lead 60 electrically connected to the tip chip electrode 10 is inserted into the tube 45. The distal end of the tip chip electrode lead 60 is embedded with solder 62 (not shown). Thus, the tip chip electrode lead 60 is electrically connected to the tip chip electrode 10 via the solder 62. The distal end of the tip chip electrode lead 60 may be electrically connected to the tip chip electrode 10 by soldering. A plurality of ring-shaped electrode leads (not shown) electrically connected to the ring-shaped electrode 12 are inserted into the tubes 43, 44, and 46 in an insulated state. The distal end of each of the ring-shaped electrode leads is electrically connected to each of the ring-shaped electrodes 12 via the tubes 43, 44, and 46 and the pores provided in the tubular member 4. The distal end of each of the ring-shaped electrode leads is fixed to the ring-shaped electrode 12 by soldering (not shown) or welding.

In the present embodiment, the pipe 41 is externally connected to the pipes 43 and 44, and the pipe 42 is externally connected to the pipes 45 and 46. The pipes 41 to 46 are closely attached to and fixed to the inner peripheral surface of the inner cylinder 4 b. The pipes 41 to 46 and the inner cylinder 4b can be fixed by means of adhesion, welding, or the like. In the first region 20A and the second region 20B, at least some of the plurality of tubes, here, the two tubes 43 and 44 on the first region 20A side and the two tubes 45 and 46 on the second region 20B side are provided so as to be in contact with the main surfaces 30A and 30B of the plate spring 30, respectively. Thus, the plate spring 30 is sandwiched between the pipes 43 and 44 and the pipes 45 and 46, and therefore, the operation of the plate spring 30 in the twisting direction with respect to the tubular member 4 can be restricted. Therefore, the torsional rigidity of the probe 2 can be further improved.

In the first region 20A and the second region 20B, the operation wire insertion tubes 41 and 42 are provided separately from the plate spring 30. Therefore, the plate spring 30 can be bent with a smaller force than in the case where the tubes 41, 42 are brought close via the plate spring 30. Therefore, the operability of the probe 2 can be improved. The tubes 41, 42 are provided, for example, as: with its central axis lying outside a circle passing through the central axes of the tubes 43, 44, 45, 46.

In the present embodiment, in the first region 20A, the two tubes 43 and 44 are provided with the center line of the plate spring 30 along the axial direction of the probe 2 interposed therebetween. Similarly, in the second region 20B, the two tubes 45 and 46 are provided with the center line of the plate spring 30 along the axial direction of the probe 2 interposed therebetween. The wire insertion tube 41 for operation is provided between the two tubes 43 and 44, and the wire insertion tube 42 for operation is provided between the two tubes 45 and 46. This allows the tubes 41 and 42 to approach the center line of the plate spring 30 in a direction parallel to the main surfaces 30a and 30b of the plate spring 30, thereby further improving the torsional rigidity of the probe 2. The wire insertion tube 41 for operation is provided so as to be externally connected to the tubes 43 and 44, and the wire insertion tube 42 for operation is provided so as to be externally connected to the tubes 45 and 46. This can improve the strength of the probe 2, compared to the case where the tube 41 is separated from the tubes 43 and 44 and the tube 42 is separated from the tubes 45 and 46.

Here, the arrangement of the tubes 41 to 46 of the probe 2 according to the present embodiment will be described in detail with reference to fig. 6. FIG. 6 is a schematic sectional view for explaining the arrangement of the tubes 41 to 46. As shown in fig. 6, in the first region 20A and the second region 20B, the plurality of tubes 41 to 46 are arranged so as to be inscribed in a virtual substantially circular shape S centered on the central axis of the probe 2. This makes it possible to easily maintain the cross-sectional shape of the tubular member 4 in a substantially circular shape. When the cross-sectional shape of the tubular member 4 is substantially circular, the insertion of the probe sheath (sheath) or the insertion of the probe 2 into the blood vessel can be facilitated. Therefore, according to the probe 2 of the present embodiment, good operability of the probe 2 can be easily ensured. The size (thickness) of the probe 2 that can be inserted into the body cavity of the patient is generally determined by the size (diameter) of the largest diameter portion of the tubular member 4. Therefore, when the sizes of the maximum diameter portions are made equal to each other for comparison, the space utilization rate of the probe 2 can be improved more than that of a flat cross-sectional shape or a polygonal cross-sectional shape when the cross-section is substantially circular. That is, the number of wires or the like that can be inserted into the tubular member 4 can be increased, and the probe 2 can be made multifunctional and high in performance.

Further, by designing the cross-sectional shape of the tubular member 4 to be substantially circular, the strength balance of the tubular member 4 can be improved, and a stable structure can be obtained against external forces from multiple directions. For example, as described above, the ring electrode 12 is fixed to the tubular member 4 by being fastened to the tubular member 4 by caulking a metal ring having a diameter larger than the outer diameter of the tubular member 4. By forming the tubular member 4 to have a substantially circular cross-sectional shape, the tubular member 4 can be prevented from being deformed by a force applied to the tubular member 4 during caulking. The "substantially circular" includes a perfect circle and a circle having a degree of roundness that can obtain the above-described effects. The side surfaces 30c and 30d of the plate spring 30 may be arranged to contact the virtual substantially circular shape S. In this case, the tubular member 4 can be configured to be more stable against external force.

In the present embodiment, two pipes 43, 44 are provided in the first region 20A so as to be separated from each other, and two pipes 45, 46 are provided in the second region 20B so as to be separated from each other. Therefore, the space 22A surrounded by the tubes 43 and 44, the tube 41, and the plate spring 30 is formed in the first region 20A, and the space 22B surrounded by the tubes 45 and 46, the tube 42, and the plate spring 30 is formed in the second region 20B. A member for adjusting the flexibility of the probe 2 (hereinafter, referred to as a flexibility adjusting member as appropriate) may be inserted into at least one of the spaces 22A and 22B as necessary. The bending adjustment member is, for example, a bar made of metal such as stainless steel (SUS) or nickel titanium (NiTi) or resin. By inserting the bending adjustment member, the rigidity of the tubular member 4 can be changed, and thereby the bending property of the probe 2 can be adjusted. By inserting the bending adjustment member into either one of the spaces 22A and 22B or inserting the bending adjustment members having different flexibility into both the spaces 22A and 22B, the bending of the probe 2 can be made to be out of target.

For example, by inserting the bending adjustment member at a position within the space 22A at a predetermined distance from the distal end of the probe 2, a region on the distal end side of the bending adjustment member can be made to be the bending region of the probe 2. This makes it possible to make the bending range of the probe 2 in the case of bending in the direction of arrow D1 in fig. 2 shorter than the bending range of the probe 2 in the case of bending in the direction of arrow D2 in fig. 2.

The bending regulating member inserted into the first region 20A may be in contact with the tube 41, the two tubes 43 and 44, and the plate spring 30, respectively. The bending adjustment member inserted into the second region 20B may be in contact with the tube 42, the two tubes 45 and 46, and the plate spring 30. In this case, the tubular member 4 can be configured to be more stable against external force.

As described above, the plate spring 30 of the probe 2 according to the present embodiment is provided inside the tubular member 4 so that at least a part of the end portions 30e and 30f extending in the axial direction of the tubular member 4 is embedded in the tubular member 4. Therefore, when the operating wires 50a and 50b are operated to apply a force to the leaf spring 30, the leaf spring 30 can be prevented from twisting with respect to the tubular member 4. This can increase the torsional rigidity of the probe 2, and as a result, the planarity of the bent region of the probe 2 can be improved. In addition, this can further reduce the possibility of the probe 2 having a defect in a bent shape and the possibility of the tubular member 4 being damaged by the torsion of the plate spring 30. Further, the tip chip electrode lead 60 and the ring electrode lead are inserted into the passages 34 to 36, so that the leads can be prevented from being entangled with each other due to bending of the probe 2. This can prevent the occurrence of a situation such as unevenness due to the wound wire on the surface of the probe 2 (tubular member 4).

The present invention is not limited to the above-described embodiments, and various modifications such as design changes can be made based on knowledge of those skilled in the art, and embodiments to which such combinations or modifications are applied are also included in the scope of the present invention. The new embodiment resulting from the combination of the above-described embodiment and the following modifications has the respective effects of the combined embodiment and modifications.

In the above embodiment, the both end portions 30e and 30f of the plate spring 30 are embedded in the tubular member 4 over the entire length, but the both end portions 30e and 30f of the plate spring 30 may be embedded in the tubular member 4 over a part of the entire length. That is, the tubular member 4 may be embedded with at least a part of the end portion 30e and/or the end portion 30f extending in the axial direction in the tubular member 4 within a range in which the effect of improving the torsional rigidity of the probe 2 can be obtained.

In the probe 2 according to the above embodiment, when the housing space 20 formed in the inner tube 4b is defined as one lumen, the inner tube 4b may have a single-lumen structure, and the tubes 41 to 46 separate from the inner tube 4b may be housed in the lumen of the inner tube 4b, but the tubes 41 to 46 may be integrated with the tubular member 4. That is, the inner tube 4b may have a multi-cavity structure in which a plurality of lumens constituting the passages 31 to 36 and the plate spring 30 are formed. In this case, a tube portion is formed by a predetermined thickness from the inner wall of each lumen constituting the passages 31 to 36, and the tube portions corresponding to the passages 33 to 36 are in contact with the main surfaces 30a and 30b of the plate spring 30. This can obtain an effect of enhancing the torsional rigidity of the probe 2. In addition, when the inner tube 4b has a multi-lumen structure, the entire main surfaces 30a and 30b and the side surfaces 30c and 30d of the plate spring 30 are embedded in the tubular member 4, and the effect of enhancing the torsional rigidity of the probe 2 can be further enhanced. In addition, in the case where the inner tube 4B has a multi-lumen structure, the probe 2 is in a state in which the region corresponding to the spaces 22A and 22B is filled with the constituent material of the inner tube 4B, but a through hole for inserting the bending performance adjusting member may be provided in the region.

In the above embodiment, the lead wires for the electrodes are inserted into all the passages 34 to 37, but all the passages 34 to 37 do not have to be the passages through which the lead wires are inserted. For example, thermocouples serving as temperature sensors for detecting the temperature near the distal end of the probe 2 can be inserted into a part of the passages 34 to 37.

Description of reference numerals: 2 … probe; 4 … tubular member; 20a … first region; 20B … second region; 22A, 22B … spaces; 30 … leaf spring; 30a, 30b … major surface; 30c, 30d … side; 30e, 30f … end; 31. 32, 33, 34, 35, 36 … pathways; 41. 42, 43, 44, 45, 46 … tubes; 50a, 50b … a handling wire.

Industrial applicability

The present invention can be used for a probe.

Claims (7)

1. A probe is characterized by comprising:

a tubular member;

a leaf spring provided inside the tubular member such that at least a part of an end portion on one side in an axial direction of the tubular member is embedded in the tubular member;

a plurality of pipe portions for forming a plurality of passages in the interior of the tubular member, respectively, the plurality of passages being provided in a first region on one main surface side of the plate spring and a second region on the other main surface side of the plate spring, respectively, and including a wire insertion passage for operation,

at least a part of the plurality of tube portions is disposed in contact with the main surface of the plate spring in the first region and the second region.

2. The probe according to claim 1,

the end portion of the plate spring is buried in the tubular member over the entire region in the axial direction of the tubular member.

3. The probe according to claim 1 or 2,

the plurality of tube portions includes at least two tube portions and a wire insertion tube portion for operation,

in the first region and the second region, the plurality of tube portions are provided such that two of the tube portions are in contact with a main surface of the plate spring and the operation wire insertion tube portion is separated from the plate spring.

4. The probe of claim 3,

in the first region and the second region, the two tube portions are provided with a center line of the plate spring in an axial direction of the probe interposed therebetween, and the operation wire insertion tube portion is provided between the two tube portions.

5. The probe of claim 4,

in the first region and the second region, the operation wire insertion tube portion circumscribes the two tube portions, and the plurality of tube portions are arranged so as to be inscribed in a substantially circular shape centered on a central axis of the probe.

6. The probe according to claim 4 or 5,

in the first region and the second region, the two pipe portions are provided separately from each other,

a member for adjusting the flexibility of the probe is inserted into at least one of the first region and the second region and a region surrounded by the two tube portions, the tube portion for inserting the operation wire, and the plate spring.

7. The probe according to claim 1,

a plurality of electrodes are provided at the distal end region of the tubular member,

a plurality of lead wires for the electrodes are inserted into at least a part of the plurality of passages except for the passage for inserting the operation wire.