JPH02154751A - Laser probe - Google Patents

Abstract

PURPOSE:To secure safety in a treatment for an object to be treated such as a blood vessel by fitting a connecting wire to recover an interposed contact member when the contact member falls for the exiting tip part of a laser guide. CONSTITUTION:A laser probe 1 to execute the treatment for a thrombus part 25 of a blood vessel 24, etc., is equipped with a laser guide 2 to transmit a laser beam to its tip side and a contact member 3 to be interposed and fitted to this exiting tip part, a thermocouple 17 is fitted to this contact member 3, and an operating guide wire 19 is passed through an inserting hole 21. Further, a connecting wire 11 and an angle operating wire 12 are fixed to the contact member 3 with a wire fixing member 9, and the other edge of the connecting wire 11 is fixed to the laser guide 2 with a holder 13. Consequently, even when the contact member 3 falls while the laser probe 1 is used, the contact member 3 can be held with the connecting wire 11 and recovered. Thus, the treatment for the blood vessel, etc., can be safely executed.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a laser probe for irradiating an internal region of a blood vessel or the like with a laser beam.

[Prior Art] Recently, attempts have been made to perform surgery to cauterize and remove blood clots formed within blood vessels using laser light. As this type of laser probe, USP No. 4.648.737 discloses a method in which a contact member is provided at the tip, the emitting end of a laser guide is connected to the contact member, and the contact member is heated by laser light. A laser probe is shown.

Then, by introducing this laser probe into the blood vessel and applying the contact member heated by laser light to the thrombus,
The heat is used to cauterize and remove the blood clot. At this time, the thrombus has completely occluded or is about to occlude the blood vessel, but
By repeatedly moving the contact member forward and backward within the blood vessel, the shape of the contact member and its high heat cause the thrombus to spread and cauterize.

[Problems to be Solved by the Invention] However, as described above, in order to cauterize a blood clot in a blood vessel, the contact member must be heated to a high enough temperature to cauterize it. Furthermore, the contact member is repeatedly moved back and forth within the blood vessel in order to spread the thrombus.

As a result, the coating on the laser guide (usually made of resin) may melt and the contact member may fall off from the laser guide.
Sufficient care must be taken when using it. If the contact member were to fall off, it could cause a serious situation such as blocking a blood vessel, so careful surgery is required to avoid this situation, but this requires a great deal of labor and is difficult to perform. Met.

The present invention has been made in view of the above problems, and its purpose is to be able to recover the contact member even if it comes off.
It is an object of the present invention to provide a laser probe which can be prevented from falling off completely and which can safely treat objects to be treated such as blood vessels.

Means and operation for solving the problems] In order to solve the above problems, the laser probe of the present invention includes a laser guide that transmits laser light to the tip side, and is attached to the emission tip of the laser guide. The device includes a contact member into which the emitting tip is inserted, and a connecting wire connected to the contact member and used for recovery when the device falls off.

Therefore, even if the contact member comes off the emission tip of the laser guide during use, it is held by the connecting wire, so the contact member can be recovered and will not fall off completely, making it safe. be.

[Embodiment] FIGS. 1 to 4 show a first embodiment of the present invention. A contact member 3 is attached to the tip of the nose guide 2 of the laser probe 1. The laser guide 2 is composed of a core and a clad made of, for example, quartz glass, and the outer periphery of the core is covered with a protective tube 4 made of resin. At the tip of the laser guide 2, the protective tube 4 is
is removed, and a portion of the laser guide 2 is directly exposed.

The tip of the laser guide 2 is inserted into the hole 6 formed in the exposed portion 5 and the covered portion in the contact portion '413. Although it may remain inserted, it is usually fixed using adhesive or caulking, which will be described later.

The contact member 3 has a main body portion 7 on the tip side shaped like a warhead, which is thicker than the outer diameter of the laser guide 2, and a portion on the rear end side shaped like a thin pipe.

The main portion 7 on the distal side of the contact member 3 has a diameter necessary and sufficient to spread the thrombus within the blood vessel, and various diameters are available depending on the condition of the blood vessel and thrombus. Ru. Further, the material of this contact member 3 is metal, ceramics, etc., but in order to prevent attachment of cauterized thrombi, etc.,
Its outer surface is treated with Teflon.

The laser guide 2 is fixed by caulking the rear end vibrator 8 of the contact member 3.

Furthermore, a short tubular wire fixing member 9 is caulked and fixed to the outer periphery of the rear end vibrator 8 near the rearmost end, and the wire fixing member 9 is connected to the outer periphery of the rear end vibrator 8 with a connecting wire. 11 and the ends of the angle operation wire 12 are inserted and fixed by caulking.

Further, a wire holder 13 is fitted in a part of the laser guide 2 apart from the contact member 3, and is fixed to the outer periphery of the laser guide 2 by caulking. When the holder 13 is caulked, the other end of the connecting wire 11 is sometimes held between the holder 13 and the outer periphery of the laser guide 2 to fix the caulking. In addition, as shown in FIG. 1, the connecting wire 11 is stretched with an appropriate amount of slack without being applied with tension or with much slack.

As shown in FIG. 3, the wire holder 13 has an enlarged portion 14 formed on one side, and a guide hole 15 along the longitudinal direction of the light guide 2 is bored in this enlarged portion 14. An angle operation wire 12 is slidably inserted through the. The proximal end side of this angle operation wire 12 is guided along the laser guide 2 to the proximal side.

Furthermore, a hole 16 is formed from the rear in the main body portion 7 on the tip side of the contact member 3, and the tip of a thermocouple 17 is housed in the hole 16 and embedded with a brazing material 18. This thermocouple 17 extends to an extravascular temperature monitor (not shown).

In addition, a guide wire 19 is provided in the distal main body portion 7 of the contact member 3 at an eccentric position from the center on the opposite side from the hole 16.
An insertion hole 21 is formed through which the insertion hole 21 passes. Guide wire 1
9 is made of elastic material. Further, the length of the guide wire 19 is such that the operator can move it forward and backward outside the blood vessel.

Next, how to use the laser probe 1 will be explained.

FIG. 1 shows a state in which the contact piece 3 has reached a thrombus 25 after being inserted into a blood vessel 24. The contact member 3 spreads out the thrombus portion 25 and presses against it. In this state, when a laser beam is introduced through the laser guide 2 and irradiated onto the contact member 3, the contact member 3 is heated. This contact member 3
The temperature is detected by a thermocouple 17, and the operator performs a laser beam irradiation operation according to the detected temperature. In this way, while keeping the temperature of the contact member 3 constant, the thrombus part 15
The contact member 3 is moved forward and backward. And thrombus part 15
It spreads out the area and cauterizes it away.

On the other hand, when guiding the contact member 3 of the laser probe 1 to the thrombus 25, it is dangerous to push the laser probe 1 forward in a situation where the thrombus 25 is almost clogged. In this case, only the thin guide wire 19 is inserted at the tip. Then, the entire laser probe 1 is pushed forward using the guide wire 19 as a guide. By doing so, risks such as blood vessel perforation during insertion can be prevented.

Further, when the laser probe 1 is inserted 1° into the blood vessel 14, if the blood vessel 14 has a branch as shown in FIG. Insert it into the part side.

That is, when the tip of the laser probe 1 reaches its branch, the angle operation wire 12 is pulled and the contact member 3 is pulled. As a result, the contact member 3 is pulled using the wire holder 13 through which the angle operation wire 12 is passed as a fulcrum, and as shown in FIG. 4, the tip side portion of the laser probe 1 in the middle can be bent. If the entire laser probe 1 is pushed in this state, it can be guided in the desired direction.

By the way, the contact member 3 is located at a distance from the laser guide 2.
The connecting wire 1 is attached to the wire holder 13 provided in the middle of the
1. Therefore, since the contact member 3 becomes hot during treatment, the laser guide 2,
In particular, even if the protective tube 4 is burnt out and the contact member 3 comes off, since the contact member 3 is connected to the laser guide 2 via the connecting wire 11, it will not completely fall off from the laser guide 2. There is no. Therefore, the contact member 3 that has come off the laser guide 2 can be recovered.

FIG. 5 shows a second embodiment of the invention. In this embodiment, the tip of the angle operation wire 12 is fixedly attached to the main body portion 7 on the tip side of the contact member 3. A hole 41 is provided in the rear end surface of the main body portion 7 on the tip side, and the tip of the angle operation wire 12 is inserted into the hole 41 and fixed by brazing.

In this embodiment, the tip of the angle operation wire 12 is attached to the tip side main portion 7 of the contact member 3, which is closer to the tip side, so that the front part of the laser probe 1 is pulled, and the laser probe 1 is curved. It also allows for sharp bends.

Note that the other configurations and effects are the same as those of the first embodiment.

6 to 9 show a third embodiment of the present invention. In this embodiment, an angle operation wire is not provided alone, and instead, a guide wire 19 is also used. That is, the insertion hole 21 is located at the leading end of the guide wire 19.
A stopper 45 larger than the inner diameter of the guide wire 19 is provided, and the stopper 45 reaches the end of the insertion hole 21 when the guide wire 19 is pulled.
It was made to hit the opening at the tip and lock it. Stopper 4
As shown in FIG. 8, the opening at the tip of the insertion hole 21 where the stopper 45 fits is a recess 4 large enough for the stopper 45 to fit therein.
6 is formed.

In this embodiment, when the laser probe 1 is introduced into the blood vessel 14 and the thrombus 15 is cauterized, the guide wire 19 is pulled as shown in FIGS. 7 and 8, and the stopper 45 is used for retraction. It is pulled into the recess 46 and evacuated. As a result, an unnecessary portion does not protrude from the contact member 3, and negative-like cauterization can be performed.

In addition, if you want to curve the laser probe 1, use the ninth
As shown in the figure, the guide wire 19 is pulled wide, and the stopper 45 is pulled into the four retraction parts 46 and pulled further from the position where it hits. As a result, the laser probe 1 is pulled using the wire holder 13 as a fulcrum, and a portion of the laser probe 1 in the middle can be bent as shown in FIG. If the entire laser probe 1 is pushed in this state, it can be guided in the desired direction.

According to this embodiment, since the angle operation wire can be omitted, the structure is simplified. The other configurations and effects are the same as those of the above embodiment.

10 and 11 show a fourth embodiment of the present invention. The same applies to the above embodiment, but as shown in FIG. 10, the laser guide 2 has a core=51 and a cladding 52.
This outer periphery is covered with a protective tube 4. The protective tube 4 in this embodiment is composed of a primary cover 53 made of silicone resin or the like, and a secondary cover 54 made of a heat-shrinkable tube covering the outer periphery of the primary cover 53. Further, two connecting wires 5 are provided between the second limb cover 53 and the secondary cover 54 over the entire length of the laser guide 2.
5.55 has been inserted.

Then, the tip of this connecting wire 55.55 (4th 10th
As shown in the figure, it protrudes forward, and this protruding part is inserted into the rear end vibrator part 8 of the contact member 3 when inserting the tip part of the laser guide 2 in Z" as shown in Fig. 11. .Furthermore, the distal end portion of the connecting wire 55.
, and is sandwiched between the outer periphery of the rear end vibrator 8 and a ring-shaped fixing member 56, and the fixing member 56 is caulked and fixed.

Therefore, in this example, the connecting wire is 55.55 mm.
Since it does not come out of the light guide 2, it does not get in the way, and the diameter of the laser probe 1 can be reduced. This improves the ease of insertion into the blood vessel 14 and the like.

FIG. 12 shows a fifth embodiment of the present invention. In this embodiment, the laser probe 1 is not introduced directly into the treatment target area using an endoscope or a catheter 61.

According to this embodiment, in a laser probe 1 provided with an angle operation wire 12 or a guide wire 19, the angle operation wire 1
2 or the guide wire 19, the contact member 3 can be pulled using the tip of the endoscope or catheter 61 as a fulcrum P.

Therefore, according to this usage method, it is possible to select the fulcrum P for pulling when bending, and the bending state can be selected. Furthermore, a wire holder for use as a fulcrum as in the above embodiment is not necessarily required.

FIGS. 13 and 14 show a sixth embodiment of the present invention. The laser probe 1 of this embodiment has an insertion hole 65 through which the connecting wire 11 is inserted in the head (main part on the tip side) 7 of the contact member 3 attached to the tip of the laser guide 2. The insertion hole 65 is provided to penetrate the laser guide 2 in a direction perpendicular to the longitudinal axis direction.

The connecting wire 11 passes through the insertion hole 65 and is folded back. That is, both ends of the connecting wire 11 are attached to a wire holder 68 consisting of a pair of heat-shrinkable tubes 66 and 67 attached to the outer periphery of the midway portion of the laser guide 2. That is, both ends of the connecting wire 11 pass between the inner periphery of the inner heat-shrinkable tube 66 and the outer periphery of the laser guide 2, and are further folded back and passed between the inner and outer heat-shrinkable tubes 66, 67. The reheat-shrinkable tubes 66 and 67 are heat-shrinked and firmly sandwiched between the tubes. Therefore, it is securely fixed.

When the laser probe 1 of this embodiment is used, it is introduced into the body cavity through the insertion channel 70 of the endoscope ff169 or a catheter (not shown), as shown in FIG. In this case, the wire holder 68 for fixing the connecting wire 11 is located outside the channel insertion lower 1 as shown in FIG. 14, and is provided in a position that does not enter the insertion channel 70.

The contact member 3 attached to the tip of the laser guide 2 in this way
is held by the connecting wire 11, so if
Even if the contact member 3 comes off, it is held by the connecting wire 11 and will not fall off. Therefore, the contact member 3 that has come off the laser guide 2 can be easily recovered.

Further, the connecting wire 11 is inserted into the insertion hole 65 of the contact member 3.
The wire holder 68 is folded back through the wire, and both ends thereof are attached to a wire holder 68 placed around the outer periphery of the laser guide 2 in the middle. That is, since the connecting wire 11 is only inserted through the insertion hole 65 of the contact member 3, it will not come off from the contact member 3 unless the connecting wire 11 is cut. Therefore, there is no need to worry about caulking strength or adhesive strength, and reliability can be improved.

Further, since the wire holder 68 for fixing the connecting wire 11 is disposed outside the channel insertion lower 1, the connecting wire 11 can be secured in the same manner as in the fifth embodiment shown in FIG. Angle 1 can be used as six wires.

Note that the connecting wire 11 may be a single wire, but the connecting wire 11 may be a single wire.
As shown in the figure, a plurality of wire strands 11a may be combined into one wire, and in this case, the strength can be increased. In addition, each wire strand 11a in this case...
The arrangement on the cross section may be as shown in FIG. 16 or FIG. 17, for example.

FIG. 18 shows a seventh embodiment of the present invention.

In the laser probe 1 of this embodiment, the insertion hole 65 of the sixth embodiment is provided in the rear end vibrator 8 of the contact member 3. Further, a guide wire insertion hole 21 provided in the head (main body portion on the distal end side) 7 of the contact member 3 and the connecting wire 1 are provided.
The insertion hole 65 through which the screw 1 is inserted is offset by 90''.The rest is the same as that of the above embodiment.

In this embodiment, the insertion hole 65 through which the connecting wire 11 is passed is provided in the rear end vibrator 8 of the contact member 3, so that when the contact member 3 falls off from the laser guide 2, it can be easily recovered.

Further, in this method, as shown in FIG. 19, a plurality of connecting wires 11 may be provided, each having an insertion hole 65, and simultaneously attached and fixed to one wire holder 68.

FIGS. 20 and 21 show an eighth embodiment of the present invention. The laser probe 1 of this embodiment has a wire insertion groove 9 in the rear end vibrator 8 of the contact member 3 along its axial direction.
1, and a small-diameter locking body portion 92 is formed in communication with the wire insertion groove 91. Then, as shown in FIG. 20, the connecting wires 11 whose intermediate portions are folded in half are passed through the wire insertion groove 91, and the intermediate bent portions of the connecting wires 11 are inserted into the small-diameter locking body portion 92. is multiplied by one turn.

Further, as shown in FIG. 21, a ring 93 is attached to the locking trunk 92 that locks the connecting wire 11 to prevent the connecting wire 11 from coming off. The rest is the same as that of the above embodiment.

Also in this embodiment, the connecting wire 11 can be reliably connected to the contact member 3 as in the above embodiment.

FIG. 22 shows a ninth embodiment of the present invention. This embodiment is similar to the eighth embodiment, but in particular, a wire insertion groove 91 is formed extending over the head 7 of the contact member 3 and the rear end vibrator 8 and along the axial direction. The intermediate portion of the connecting wire 11, which is folded in half and communicates with the common groove 91, is wound around the connecting wire 11 once. Further, a ring 93 is attached to the locking body 92 to prevent the connecting wire 11 from coming off. The rest is the same as the eighth embodiment.

FIG. 23 shows a tenth embodiment of the present invention.

This embodiment is similar to the seventh embodiment, but in particular, the connection wire 11 is inserted into the insertion hole 65 provided in the rear end vibe 8 of the contact member 3, and the wire holder is attached to the outer periphery of the midway part of the laser guide 2. It is wound around the outer periphery of the laser guide 2 between the tool 68 and the laser guide 2.

That is, the connecting wire 11 is folded back through the insertion hole 65, wound spirally around the outer periphery of the laser guide 2, and then both ends thereof meet the inner periphery of the heat-shrinkable tube 66 inside the wire holder 68 and the laser guide 2. It is fixed by passing between the outer periphery of the guide 2, and then folded back and passing between the inner and outer heat-shrinkable tubes 66, 67 and fixed. The rest is the same as the seventh embodiment.

In this embodiment, the long connecting wire 11 is wound around the outer periphery of the laser guide 2 between the insertion hole 65 and the wire holder 68, so that the operator's fingers will not get tangled with it or the protruding part of the treatment target area. It is possible to prevent the laser probe from getting caught and to improve the ease of use of the laser probe 1.

24 to 26 show an eleventh embodiment of the present invention. This embodiment differs from the tenth embodiment in that the contact member 3 attached to the tip of the laser guide 2 is divided into two parts: a head (main part on the tip side) 7 and a rear end vibrator 8, and these are screwed together. It is fixed so that it can be easily removed.

That is, the inner periphery on the rear end side of the hole 6 formed in the head (main body portion on the front end side) 7 and the outer periphery on the front end side of the rear end vibrator 8 are provided with threaded portions 101 that are screwed into each other. As shown in FIG. 26, the rear end vibrator 8 has a smaller diameter than the inner diameter of the insertion channel 70 of the endoscope (or catheter) 69, and is fixed to the laser guide 2 by caulking. Further, an insertion hole 21 through which a guide wire 19 is inserted is formed in the head (main portion on the distal end side) 7 at a position eccentric from the center. The rest is the same as the tenth embodiment described above.

Therefore, when using the laser probe 1 of this embodiment, as shown in FIG. The rear end vibrator 8 is made to protrude from the side opening, and the threaded part 101b of the head (distal end side main part) 7 is screwed into the threaded part 101a of the rear end vibrator 8 to be fixed. Then, the laser probe 1 is introduced into the body cavity through these six endoscopes (or catheters).

In this embodiment, the contact member 3 is the head (main body portion on the tip side) 7.
and the rear end vibrator 8, and these are fixed in a removable manner with screws, so that the head (which has a larger diameter than the inner diameter of the insertion channel 70 of the endoscope (or catheter) 69) By preparing the heads (distal main body part) 7 with various diameters depending on the condition inside the treatment target area, the head (distal main body part) 7a with different diameters can be used, as shown in FIG. 25. can be easily installed and can perform efficient treatment.

FIG. 27 shows a twelfth embodiment of the present invention.

This embodiment differs from the eleventh embodiment described above in that the insertion hole 21 through which the guide wire 19 is inserted is formed in a straight line so that its distal opening is located at the center of the head (distal main body portion) 7 of the contact member 3. It was formed in Others are listed in 11 above.
This is similar to the embodiment.

In this embodiment, the guide wire 19 is connected to the head of the contact member 3 (
Therefore, the guide wire 19 passes through the center of the blood vessel. Therefore, the guide wire 19 can be prevented from being biased toward one side wall of the blood vessel, and the laser probe 1 can be easily inserted even into a narrow blood vessel.

FIG. 28 shows a thirteenth embodiment of the present invention.

This embodiment is similar to the twelfth embodiment above, but in particular:
The insertion hole 21 through which the guide wire 19 is inserted is bent into a substantially square shape, and its distal opening is located at the center of the head (distal main body portion) 7 of the contact member 3.Other points are as follows. This is the same as the eleventh embodiment described above.

In this embodiment as well, since the distal end opening of the insertion hole 21 is located at the center of the head (distal main body portion) 7 of the contact member 3, the same effects as in the twelfth embodiment are achieved.

FIG. 29 and TS30 show a fourteenth embodiment of the present invention. In this embodiment, in the eleventh embodiment, a rear end vibrator 8 is fixed at a position eccentric from the center of the head (distal main body part) 7, and guided to the center of the head (distal main body part) 7. An insertion hole 21 through which the wire 19 is inserted is provided in a straight line.

In this embodiment, the guide wire 19 is connected to the head of the contact member 3 (
Therefore, the guide wire 19 passes through the center of the blood vessel 24 as shown in FIG. 30. Therefore, the guide wire 19 can be prevented from being biased toward one side wall of the blood vessel 24, and the laser probe 1- can be easily inserted even into the narrow blood vessel 24.

FIGS. 31 and 32 show a fifteenth embodiment of the present invention. The contact member 3 of this embodiment has a 60 on the rear end side, into which the portion of the tip of the laser guide 2 from which the protective tube 4 has been removed and the covered portion behind this are inserted.
The tip is shaped like a warhead. A recess 105 is formed in the middle of the contact member 3, and an insertion hole 21 through which the guide wire 19 is inserted extends from the distal end of the warhead-shaped portion 106 to the recess 105 along the longitudinal axis of the contact member 3. The holes are formed in parallel to each other. Further, this contact member 3 has an insertion hole 65 located below the recessed portions 1 and 05 and through which the connecting wire 11 is inserted, and both ends of the connecting wire 11 that are folded back through the insertion hole 65 are provided. is secured to a wire holder 68 consisting of a pair of heat-shrinkable tubes 66 and 67 attached to the outer periphery of the midway portion of the laser guide 2.

In this embodiment, the contact member 3 is provided with a recessed portion 105, and the guide wire 19 insertion hole 21 is provided from the tip of the distal warhead-shaped portion 106 toward this recessed portion 105. The insertion hole 21 parallel to the axis of the contact member 3 can be formed without increasing the outer diameter of the shaped portion 106). In other words, in the case where the recessed portion 105 is not provided, in order to provide the insertion hole 21 parallel to the axis of the contact member 3, the outer diameter of the tip side of the contact member 3 should be made smaller than the outer diameter of the rear end side as in the other embodiments. It needed to be thicker. Therefore, by providing the recessed portion 105 in the contact member 3, it is possible to provide the insertion hole 21 parallel to the axis of the contact member 3 on the front end side of the contact member 3 and having the same diameter as the rear end side. Therefore, it becomes possible to insert it into finer in-vivo blood vessels, and when using an endoscope or catheter, it becomes possible to insert it into finer channels.

FIG. 33 shows a sixteenth embodiment of the present invention.

In this embodiment, a hole 112 is formed on the rear end side of the contact member 3 into which only the core and cladding portion 111, which is the portion from which the protective tube 4 at the tip of the laser guide 2 has been removed, are inserted. Then, the core and cladding part 111 are inserted into this hole 112 with the tip end face of the covering part 113 of the laser guide 2 abutting against the rear end face of the contact member 3, and these are fixed with adhesive or the like. . The rest is the same as the fifteenth embodiment described above.

In this embodiment, only the core and cladding part 111 of the laser guide 2 are inserted into the hole 112 of the contact part +43, so the outer diameter of the contact member 3 is set to >IN m of the laser guide 2.
The outer diameter of the portion 112 can be made approximately equal to the outer diameter of the portion 112, so that it can be inserted into even thinner in-vivo blood vessels or channels of endoscopes and catheters.

FIG. 34 shows a seventeenth embodiment of the present invention.

The contact member 3 of this embodiment has a small diameter portion 115 behind the tip warhead shape portion 106, and a guide wire 19 insertion hole 21 is provided from the tip of the tip bullet shape portion 106 to the annular end surface 116 on the small diameter portion 115 side. It is formed along the longitudinal axis direction of the contact member 3. The other configurations and effects are the same as those of the fifteenth embodiment.

FIG. 35 shows an 18th embodiment of the present invention.

This embodiment is the same as the contact member 3 in the fifteenth embodiment.
A dish-shaped recess 121 is formed in place of the recess provided in the. An insertion hole 21 for the guide wire 19 extends from the tip of the tip warhead-shaped portion 106 to this dish-shaped recess 121.
is formed along the longitudinal axis direction of the contact member 3.

In this embodiment, the same effects as in the fifteenth embodiment described above can be exhibited, and since a dish-shaped recess 121 is formed in place of the recess, the guide wire 19 and the contact member 3 (the dish-shaped recess 12
1) The frictional resistance will be reduced and the frictional resistance will be reduced.
The laser probe 1 can be moved back and forth more smoothly along the guide wire 19.

Note that the present invention is not limited to the above embodiments.

[Effects of the Invention] As explained above, according to the present invention, even if the contact member comes off the emission tip of the laser guide during use, it is held by the connecting wire, so the contact member will not be completely damaged. This contact member can be recovered without falling off. Therefore, it is possible to safely perform treatment on a treatment target such as a blood vessel.

[Brief explanation of the drawing]

FIG. 1 is a side cross-sectional view of the vicinity of the tip of a laser probe showing a first embodiment of the present invention, FIG. 2 is a cross-sectional view taken along line A-A in FIG. 1, and FIG. - Sectional view along line B, No. 4
The figure is an explanatory diagram of the state of use of the laser probe of the first embodiment, FIG. 5 is a side sectional view of the vicinity of the tip of the laser probe showing the second embodiment of the present invention, and FIG. FIG. 7 is a side sectional view of the vicinity of the tip of the laser probe showing the third embodiment; FIG. 8 is a section A in FIG. 7; FIG. 9 is a usage state diagram of the vicinity of the tip of the laser probe according to the third embodiment, and FIG. 10 is a perspective view of the tip of the laser probe according to the fourth embodiment of the present invention. FIG. 11 is a tlj plane view of the tip of the laser probe according to the fourth embodiment of the present invention, and FIG. 12 is a view of the tip of the laser probe according to the fifth embodiment of the present invention.
FIG. 13 is a side cross-sectional view of the laser probe showing the sixth embodiment of the present invention, and FIG. 14 is an explanatory diagram showing the state of use of the sixth embodiment. A perspective view, Fig. 15 is a side view of the connecting wire, Fig. 16
17 and 17 are respectively sectional views of a connecting wire, FIG. 18 is a side sectional view of a laser probe showing a seventh embodiment of the present invention, and FIG. 19 is a modified example of the seventh embodiment. 20 is a side sectional view of the laser probe shown in FIG. 20, FIG. 21 is a perspective view of the tip of the laser probe according to the eighth embodiment, and FIG. 9
An exploded perspective view of the tip of a laser probe showing an example of
FIG. 23 is a side sectional view of a laser probe showing a tenth embodiment of the invention, FIG. 24 is a side sectional view of the tip of a laser probe showing an eleventh embodiment of the invention, and FIG. FIG. 26 is a side sectional view of the tip of the laser probe according to the eleventh embodiment, FIG. 26 is a perspective view of the eleventh embodiment in use, and FIG. 27 is a laser probe according to the twelfth embodiment of the present invention. FIG. 28 is a side sectional view of the tip of a laser probe showing a thirteenth embodiment of the present invention, and FIG. 29 is a side sectional view of the tip of a laser probe showing a fourteenth embodiment of the present invention. The side sectional view of the tip, FIG. 30, is also the first
FIG. 31 is a side view of the tip of the laser probe showing the fifteenth embodiment of the present invention;
FIG. 32 is an enlarged view of the contact member showing the fifteenth embodiment, FIG. 33 is a side sectional view of the tip of the laser probe showing the sixteenth embodiment of the present invention, and FIG. FIG. 35 is a side view of a contact member showing a seventeenth embodiment, and FIG. 35 is a side view of a contact member showing an eighteenth embodiment of the present invention. 1... Laser probe, 2... Laser guide, 3...
... Contact member, 11 ... Connection wire, 19 ... Guide wire, 24 ... Blood vessel, 25 ... Thrombus part, 55
...Connection wire. Applicant's Representative Patent Attorney Atsushi Tsuboi

Claims (1)

[Claims] A laser guide that transmits laser light to the tip side, a contact member that is attached to the emission tip of this laser guide and has the emission tip inserted, and a contact member that is connected to this contact member and used for recovery when it falls off. A laser probe comprising a connecting wire.