JPH11318968A - Hand piece for laser surgery device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a hand piece for laser surgery device capable of completely performing incision by a laser, sufficiently increasing the size of an opening diameter for the outer diameter of a probe or without increasing the diameter of a fiber. SOLUTION: This hand piece has a probe 2 of a tubular form to be inserted into a body, an opening hole part 7 provided on a side surface in the vicinity of a tip of the probe 2 for sucking an tissue and a fiber 4 having an injection end face arranged adjacently to the opening hole part 7, inserted within the probe 2 for guiding laser beam. The shape in cross section of at least the injection end part of the fiber 4 is molded into a flat shape. The luminous flux width of injected laser beam can be widened without expanding occupancy space of the fiber 4 by forming the shape in cross section of the injection end part into the flat shape and an excellent operation can be performed.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention is used in a laser surgical apparatus for ablating a diseased living tissue using a laser beam, and has a built-in fiber for guiding the laser beam and is inserted into a living tissue such as an eye. The present invention relates to a laser surgical device handpiece having

[0002]

2. Description of the Related Art Conventionally, in surgery in the eye such as the vitreous body, a probe having a fiber housed in a thin tube is inserted into living tissue, a laser beam is guided by the fiber, and a vitreous body opaque by the laser beam. 2. Description of the Related Art There is known a handpiece for a laser surgical apparatus for cutting a living tissue and removing it by suction.

In this type of laser surgical device handpiece, an opening is provided near the tip of the probe for aspirating living tissue, and the opening end of the fiber is adjacent to the opening end of the fiber. There is proposed an arrangement in which a diseased living tissue sucked through the opening hole is cut by a laser beam to remove the diseased tissue by suction.

[0004]

However, in the above-mentioned conventional handpiece for a laser surgical apparatus, the cross-sectional shape of the exit end face of the built-in fiber is circular. For this reason, the passing optical path width of the laser beam crossed and cut through the opening is narrow, and the size of the opening is further larger than the diameter of the laser beam in order to completely cut the living tissue. It is necessary to reduce the size, and the size of the opening hole is limited. or,
In order to enlarge the opening hole and completely cut the living tissue, the outer diameter of the fiber must be increased, and as a result, the outer diameter of the probe itself inserted into the living body is necessarily increased. Had the problem that

SUMMARY OF THE INVENTION In view of the above circumstances, the present invention provides a laser capable of completely cutting with a laser without increasing the diameter of the fiber while increasing the size of the opening hole with respect to the outer diameter of the probe. A handpiece for a surgical device is proposed.

[0006]

SUMMARY OF THE INVENTION The present invention provides a tubular probe to be inserted into a living body, an opening provided on a side surface near the tip of the probe for sucking a living tissue, In a laser surgical instrument handpiece having an emission end face disposed adjacent to the hole and inserted into the probe for guiding a laser beam, at least the emission end of the fiber has a flat cross-sectional shape. The present invention relates to a laser surgical instrument handpiece formed into a shape, and also relates to a laser surgical instrument handpiece having a flat shape at the emission end face of the fiber along the inner surface of the probe,
Further, the present invention relates to a handpiece for a laser surgical apparatus in which a core width of an emitting portion is made wider than a width of the opening, and a handpiece for a laser surgical apparatus having the same cross-sectional shape from the emitting end face of the fiber to a required length. In addition, the present invention relates to a handpiece for a laser surgical apparatus having a symmetrical cross-sectional shape over a required length from the emission end face of the fiber. Without expanding the space occupied by the laser beam, the beam width of the emitted laser beam can be widened, and good surgery can be performed.

[0007]

Embodiments of the present invention will be described below with reference to the drawings.

First, an outline of a handpiece for a laser surgical apparatus will be described with reference to FIGS.

A probe 2 extends from the tip of the handgrip 1. The probe 2 has a structure in which a fiber 4 is housed so that a space is left in a small-diameter hollow tube 3 as will be described later, and the fiber 4 extends from a base end of the handgrip 1. The optical cable 5 is connected to a laser light source (not shown). The laser light source unit is an Er / YAG (erbium yag) laser light source unit that emits an infrared laser beam having a wavelength of 2.94 μm corresponding to water absorption. The hollow portion of the tube 3 communicates with a suction port 6 provided at the distal end of the handgrip 1, and the suction port 6 is connected to a suction machine (not shown).

Referring to FIGS. 2A and 2B, the probe 2
Will be described.

The tubular body 3 is a hollow tube having a closed end, and a substantially elongated opening in the axial direction of the tubular body 3 is provided on a side surface near the leading end (upper surface of the leading end in the figure). A hole 7 is provided. The fiber 4 having a diameter smaller than the inner diameter of the tube 3 is housed along the inner surface of the tube 3 at the uppermost position inside the tube 3, and the tip of the fiber 4 slightly closes the opening 7. The tip surface is adjacent to the opening hole 7. The remaining space in the tubular body 3 excluding the fiber 4 is a suction chamber 8, which communicates with the opening 7 and the suction port 6.

Regarding the shape of the tip of the fiber 4,
This will be described with reference to FIGS. FIG.
(A), (B), and (C) are respectively BB of FIG.
It shows a sectional view, a CC sectional view, and a DD sectional view.

The fiber 4 forms an optical path, and has a core 10 made of a material such as anhydrous quartz, a clad 11 covering the core 10, and a plating coating such as Ni-Cr plating on the clad 11.

As shown in FIG. 3A, the emission end face of the fiber 4 has a flat shape having a cross section of a mirror cake formed by an arc and a chord along the inner surface of the tube 3, and the core of the emission end face is formed. The width is larger than the width of the opening 7. As shown in FIG. 3 (B), such a flat shape gradually returns to a circular shape as it separates from the injection end face, and the flat shape in FIG. A perfect circle is formed at the position of the DD section (FIG. 3).
(C)). By making the exit end face flat as described above, a wide light beam is obtained, and the space occupied by the fiber 4 is significantly smaller than the width of the light beam.

The injection end of the fiber 4 is formed by compression while heating, and the shape of the cross section is continuously changed to be flat while maintaining the continuity of the structure of the material.

The infrared laser beam emitted from a laser light source (not shown) changes into a flat light beam at the tip of the fiber 4 and is emitted from the emission end face. As described above, since the core width of the emission end face is wider than the opening width of the opening 7, the luminous flux width of the emitted laser beam is also wider than the opening width of the opening 7. The living tissue sucked into the suction chamber 8 is completely cut by the laser beam.

The second embodiment will be described with reference to FIGS. 4, 5A, 5B, and 5C.

As shown in FIG. 5A, the emission end face of the fiber 4 has a flat shape curved in an arc shape along the inner surface of the tubular body 3, and the core width of the emission end face is equal to the opening hole 7.
Is larger than the width. The flat shape of the cross section of the fiber 4 gradually returns to a circular shape as it moves away from the emission end face (FIG. 5 (B)), and the cross-sectional position in FIG. Is a perfect circle (FIG. 5C).

The third embodiment will be described with reference to FIGS. 6, 7A, 7B and 7C.

In the third embodiment, the fiber 4
Is formed by heating and compressing into a flat plate so that the center of the figure in the cross section does not change. The exit end face has a flat cross section, and the core width is larger than the opening width of the opening hole 7. Also in the third embodiment, the flat shape of the cross section gradually returns to a circular shape as the distance from the emission end face increases, and the cross section taken along a line DD in FIG.
The cross section is a perfect circle.

FIGS. 8A and 9B, FIGS. 9A and 9B
The fourth embodiment will be described with reference to FIGS.

FIGS. 8A and 8B show the distal end of the probe 2. FIG. 8A and FIG.
The same components as those shown in (B) are denoted by the same reference numerals.

The distal end of the fiber 4 is formed into a flat shape as described later, and is formed so as to have the same width over a required length of the distal end. The shape of the exit end face of the fiber 4 and the cross-sectional shape of the distal end may be the required flat shapes shown in FIGS. 3, 5, 7 and the like, but FIGS. 9A and 9B.
(C) and (D) show the flat shape curved in an arc shape shown in FIG.

The flat shape of the cross section of the fiber 4 gradually returns to a circular shape as it separates from the exit end face, and at the II cross section position in FIG. Although the shape becomes a perfect circle (FIG. 9D), since the cross-sectional shape does not change with the required length of the tip, the injection end surface at the FF cross-sectional position in FIG. 8A shown in FIG. FIG.
The cross-sectional shape at the GG cross-sectional position in FIG. 8A shown in FIG. FIG. 9 (C) is the same as FIG. 8 (A).
The H-H section position in the middle is shown.

Since the distal end of the fiber 4 has the same cross section as the required length, the core width of the exit end of the fiber 4 does not change even if the distal end is polished or the like, and the handleability is good. is there.

[0026]

FIG. 10 shows an embodiment of the above-mentioned embodiment, in which the handpiece for a laser operation apparatus according to the present invention is used for the operation of the eyeball 15.

The probe 2 is used to cut an incised sclera 1 of a patient.
6 and inserted into the vitreous body 17. The opening hole 7
Is positioned on the diseased tissue in the vitreous body 17, and the suction chamber 8 is evacuated through the suction port 6. The diseased tissue is sucked into the suction chamber 8 through the opening 7 and enters. An infrared laser beam is emitted from a laser light source (not shown), guided to the optical cable 5 and the fiber 4, and emitted from the emission end face. The entered lesion tissue is cut by the emitted laser beam. As described above, the laser beam changes into a flat light beam at the tip end, and is emitted from the emission end face.
Since the width of the luminous flux of the emitted laser beam is larger than the opening width of the opening 7, the entered diseased tissue is completely cut off and collected by the external suction device through the suction chamber 8.

In FIG. 10, reference numeral 18 denotes a cornea, and 19 denotes a crystalline lens.

[0029]

As described above, according to the present invention, by making at least the emission end face of the fiber a flat shape, the spread range of the emitted light beam of the laser beam can be widened as compared with the circular emission end face. Therefore, even if the opening is sufficiently large, the living tissue sucked from the opening can be completely cut by the laser beam, so that an excellent operation can be performed.

[Brief description of the drawings]

FIG. 1 is an overall view showing an embodiment of the present invention.

FIG. 2 is an enlarged view of a probe tip portion in the embodiment, (A) is a plan view, and (B) is a cross-sectional view along AA.

3A and 3B show the previous embodiment, wherein FIG. 3A is a sectional view taken along line BB of FIG. 2A, FIG. 3B is a sectional view taken along line CC of FIG.
(C) is a DD sectional view of FIG. 2 (A).

FIG. 4 shows a second embodiment, and is AA in FIG. 2 (A).
It is sectional drawing.

5A and 5B show a second embodiment, in which FIG.
2B is a sectional view taken along line BB, FIG. 2B is a sectional view taken along line CC of FIG.
(C) is a DD sectional view of FIG. 2 (A).

FIG. 6 shows a third embodiment, and is a sectional view taken on line AA of FIG.
It is sectional drawing.

7A and 7B illustrate a third embodiment, in which FIG.
2B is a sectional view taken along line BB, FIG. 2B is a sectional view taken along line CC of FIG.
(C) is a DD sectional view of FIG. 2 (A).

FIGS. 8A and 8B are enlarged views of a tip portion of a probe according to a fourth embodiment, in which FIG. 8A is a plan view and FIG. 8B is an EE cross-sectional view.

FIG. 9 shows the fourth embodiment, and FIG.
8A is a sectional view taken along line FF, FIG. 8B is a sectional view taken along line GG of FIG. 8A, FIG. 8C is a sectional view taken along line HH of FIG. 8A, and FIG. FIG.

FIG. 10 is an explanatory view showing an embodiment of the laser surgical device handpiece according to the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Hand grip 2 Probe 3 Tube 4 Fiber 5 Optical cable 7 Opening hole 8 Suction chamber

Claims (5)

[Claims] 1. A tubular probe to be inserted into a living body, an opening provided on a side surface near the tip of the probe for suctioning a living tissue, and an emission end face adjacent to the opening. In a laser surgical device handpiece having a fiber disposed in the probe for guiding a laser beam, the cross-sectional shape of at least the emission end of the fiber is formed into a flat shape. Laser surgical device handpiece. 2. The handpiece for a laser surgical apparatus according to claim 1, wherein the shape of the fiber at the emission end face is flat along the inner surface of the probe. 3. The handpiece for a laser surgical apparatus according to claim 1, wherein the width of the core of the emission section is wider than the width of the opening. 4. The handpiece for a laser surgical apparatus according to claim 1, wherein the cross-sectional shape is the same over a required length from the emission end face of the fiber. 5. The handpiece for a laser surgical apparatus according to claim 1, wherein the cross-sectional shape is symmetrical over a required length from the emission end face of the fiber.