JPH069611U - Laser probe - Google Patents

Abstract

(57) [Abstract] [Purpose] Laser light is applied from both sides of the blood vessel across the blood vessel, and the blood in the blood vessel is coagulated by the laser light. A tweezer-like member 10 having a pair of extending portions 10a and 10b extending in parallel with one end portion 10 'integrally coupled, and an optical fiber 50a extending along the extending portions 10a and 10b. , 50b.
The optical fibers 50a and 50b are the extension parts 10a and 10
Light emitting end faces 50a 'and 50b' face each other at the tip of b, and a blood vessel is sandwiched between the light emitting end faces, and laser light is applied from both sides of the blood vessel.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 INDUSTRIAL APPLICABILITY The present invention provides a laser probe, and more specifically, a laser suitable for use in irradiating a blood vessel with laser light to coagulate blood in the blood vessel and thus to clot the blood vessel in a surgical operation or the like. Regarding the probe.

[0002]

[Prior art]

 In a surgical operation, for example, a surgical operation for removing a tumor or the like, a blood vessel communicating with the tumor is occluded so that bleeding does not occur even if the blood vessel is cut, and then the blood vessel is cut.

FIG. 4 is a diagram for explaining an example of a conventional probe used to occlude a blood vessel as described above. (A) is an overall perspective view and (b) is a plan view. Reference numeral 10 is a tweezers-like member having a pair of extending portions 10a and 10b which extend integrally in parallel and are integrally coupled to each other at the one end portion 10 'side. As is well known, when the force is applied in the direction of arrow A, the forceps-shaped member 10 narrows the distance D between the ends of the extension portions 10a and 10b, and returns to its original state when the force is removed. There is. Reference numerals 20a and 20b are conductive wires arranged along the respective extended portions 10a and 10b, 20 is a lead wire for supplying a high frequency current to these conductive wires 20a and 20b, and 30 is a connector.

FIG. 5 is a view showing the details of the tip portions of the extension portions 10a and 10b. Reference numerals 21a and 21b denote electrodes disposed to face the tip portions of the extension portions 10a and 10b, respectively. The blood vessel 40 is sandwiched between these electrodes 21a and 21b. This blood vessel 40 is cut after the high-frequency current is passed between the electrodes 21a and 21b to coagulate the blood in the blood vessel to stop the blood flow. . In this way, a blood coagulator having two electrodes facing each other is called a bipolar coagulator. As is well known, this bipolar coagulator coagulates two adjacent blood vessels to be cut as described above, The space between them is cut with scissors for micro surgery.

[0005]

[Problems to be solved by the device]

 Thus, when a high-frequency current is passed through the blood vessel to coagulate the blood in the blood vessel as described above, it is important to remove the stains on the electrode surface. If blood or other substances adhere to the electrode part of the bipolar coagulator, the efficiency will deteriorate, and at the same time, after blood coagulation, the electrode will adhere to the blood vessel and cannot be removed, which may cause a large amount of bleeding. Moreover, since the electric current flows through the passage having a small electric resistance, the coagulation site and size are not constant, and stable coagulation cannot be performed. For example, when carbonized tissue adheres to the center of the electrode, even if the blood vessel is sandwiched in the center, current flows while avoiding this carbonized tissue, so hemostasis occurs at the location corresponding to this center. Cannot be performed and it is not possible to confirm where the bleeding was stopped. Moreover, the area of the current passage at that time was also indefinite, and it was difficult to obtain the desired hemostasis.

[0006]

[Means for Solving the Problems]

 In order to achieve the above object, the present invention provides: (1) a tweezer-like member having a pair of extending portions extending in parallel with one end integrally coupled, and an optical fiber extending along the respective portions. The light emitting end faces of the optical fibers are opposed to each other at the tip of the part, and (2) the light emitting end faces of the optical fibers are coated with a light transmitting member, and (3) A tweezer-like member having a pair of extending portions extending in parallel with each other, one end portion of which is integrally coupled, an optical fiber extending along each of the extending portions, and a pair of distal end portions of the optical fibers. It is composed of a mirror or a prism provided facing each other, and the light emitted from the optical fiber is emitted in the opposite direction by the mirror or the prism. That.

[0007]

[Action]

 Laser light is applied from both sides of the blood vessel across the blood vessel, and the blood light in the blood vessel is coagulated by the laser light.

[0008]

【Example】

 1A and 1B are views for explaining an embodiment of a laser probe according to the present invention. FIG. 1A is an overall perspective view and FIG. 1B is a plan view, which is similar to the prior art shown in FIG. The parts that operate are given the same reference numerals as in FIG. In FIG. 1, reference numeral 50 denotes an optical fiber cable, and an end portion (not shown) of the optical fiber cable 50 is connected to a laser light source. The optical fiber cable 50 is divided into 50a and 50b, 50a extending along the extension 10a and 50b extending along the extension 10b, and at the tip end, the light emitting end faces 50a 'and 50b of both optical fiber cables. 'Is facing.

2A and 2B are enlarged views showing an end face structure of the optical fiber at the tip portion, where FIG. 2A is a view in which both tip portions are opposed to each other, and FIG. 2B is an end face perspective view showing the optical fiber cables 50a and 50b. The light emitting end faces 50a ', 50b' of the light emitting end faces 50a ', 50b' face each other in parallel and concentrically as shown in FIG. Therefore, if a blood vessel is sandwiched between the end faces of these optical fibers 50a and 50b as described above, and then laser light is emitted from the end faces of the optical fibers, blood in the blood vessels will be coagulated and hemostasis will be achieved. You can At this time, it is possible to coat the light emitting end faces 50a ', 50b' of the optical fibers 50a, 50b with a translucent material such as Teflon which is difficult to adhere to living tissue. After that, when the light emitting end face is separated from the blood vessel, it is easy to separate and does not damage the blood vessel.

FIG. 3 is an enlarged view showing another example of the tip portion of the laser probe shown in FIG. 1, in which 60a is a mirror and 70a is a prism (only the extension 10a is shown in the figure. The laser light emitted from the optical fiber 50a is reflected by the mirror 60a and emitted through the translucent window 10a ', or is refracted by the prism 70a and emitted. However, as in the embodiment shown in FIG. 2A, these emission directions are emitted in the direction opposite to the laser light emitted from the not-shown extension 10b side. In this case as well, it is preferable to coat the translucent window 10a 'and the light emitting surface 70a' of the prism 70a with a material that does not easily adhere to the living tissue.

[0011]

【effect】

 As described above, according to the present invention, the light emitting end faces of a pair of optical fibers are opposed to each other, a blood vessel is sandwiched between the opposed faces, and then laser light is emitted from the light emitting end faces of the optical fibers to remove blood in the blood vessel. It is designed to coagulate and stop bleeding. In this way, when bleeding is stopped by using laser light, the laser light travels straight and flows through a passage (a passage with low resistance) that easily flows like an electric current. Since nothing is done, the hemostasis position can be reliably determined, and reliable hemostasis can be performed. Further, when the light emitting end surface of the optical fiber is coated with a transparent material such as Teflon that is hard to adhere to the living tissue, when the optical fiber is separated from the blood vessel after hemostasis, the living tissue is attached to the light emitting end surface of the optical fiber. Therefore, there is no possibility of damaging blood vessels and causing bleeding after hemostasis.

[Brief description of drawings]

1A and 1B are views for explaining an embodiment of a laser probe according to the present invention, FIG. 1A is an overall perspective view, and FIG. 1B is a plan view.

2 is an enlarged view showing the structure of the tip portion of the laser probe shown in FIG. 1, (a) showing a state in which light emitting end faces are arranged substantially parallel and concentrically, (b). FIG. 4 is a perspective view of a light emitting end face.

FIG. 3 is an enlarged view showing another structure of the tip portion of the laser probe shown in FIG. 1, (a) being an example using a mirror,
(B) shows an example using a prism.

FIG. 4 is a diagram for explaining an example of a conventional probe, (a) is an overall perspective view, and (b) is a plan view.

5 is an enlarged view of the tip of the probe shown in FIG.

[Explanation of symbols]

10 ... Tweezer-like member, 20 ... Lead wire, 30 ... Connector, 40 ... Blood vessel, 50 ... Optical fiber cable, 50
a, 50b ... Optical fiber, 50a ', 50b' ... Light emitting end face.

Claims (3)

[Scope of utility model registration request] 1. A tweezers-shaped member having a pair of extending portions extending in substantially parallel to each other, one end portion of which is integrally coupled,
A laser probe, comprising: an optical fiber extending along each of the extending portions, wherein the optical fibers have light emitting end faces facing each other at a tip portion of the extending portion. 2. The laser probe according to claim 1, wherein the light emitting end surface of the optical fiber is coated with a light transmitting member. 3. A tweezers-like member having a pair of extending portions extending in substantially parallel to each other, one end portion of which is integrally coupled,
An optical fiber extending along each of the extension portions, and a mirror or prism provided facing the tip of the optical fiber, and the light emitted from the optical fiber is emitted in the opposite direction by the mirror or prism. The laser probe is characterized in that