JPH0311013Y2 - - Google Patents

Description

[Detailed description of the invention] [Field of industrial application] This invention relates to a medical infrared light irradiation device (hereinafter referred to as an infrared light irradiation device), and more specifically, a probe for deep irradiation. This invention relates to an infrared light irradiation device for use.

[Conventional technology]

2. Description of the Related Art Recently, in the medical field, infrared light irradiation devices have been proposed and put into practical use, which utilize thermal energy of infrared rays to perform hemostasis treatment for bleeding in an affected area or treatment such as vaporization of affected tissue. Such infrared light irradiation equipment basically uses argon or
It consists of an infrared light emitting device such as YAG, and a bendable or bendable light guide fiber that guides the infrared light emitted from the infrared light emitting device to the desired affected area. In order to irradiate infrared light from a probe for deep irradiation when the body is inside an organ, it has been proposed that the probe is attached to the tip side of a light guide fiber. by the way,
With an infrared light irradiation device configured like this, the tip of the probe is usually inserted into an organ and pushed to the affected area to treat the affected area, but it is difficult to confirm the exact position of the probe tip. In that case,
Even if the tip of the probe is accidentally inserted too deeply, this cannot be confirmed, and irradiating infrared light onto a normal area in that state may pose a serious danger to the living body.

Therefore, in order to be able to accurately insert the probe tip into an affected area such as a tumor at a predetermined depth inside an organ, as shown in Figure 4,
It has been proposed that a limiter b is attached to the tip side of the probe a.

[Problem to be solved]

By the way, in the case of an infrared light irradiation device having such a configuration, the attachment position of the limiter b with respect to the probe a is usually adjusted at any time according to the depth of the affected area. When an operating force is applied, it slides against the probe b, and for example, while the handpiece C is being grasped in order to insert the tip of the probe a into an affected area (not shown) and irradiate it with infrared light. If a force exceeding the previous operating force is applied to the limiter b by mistake, the limiter b may slide and the position of the tip of the probe a, which has been adjusted to the affected area, may shift. However, if the limiter b slides slightly, it is difficult to visually confirm this, and therefore, even if the limiter b is attached, there is a possibility that it will not be able to fully demonstrate its function.

Therefore, in order to prevent the limiter from shifting during infrared light irradiation, attempts have been made to selectively fix limiter b to the probe a side using fixing means such as screws. For example, if a screw hole for screwing is formed on the side of probe a, there is a risk that infrared light may leak from there, and even if it is possible to prevent infrared light from leaking from the screw hole, probe a is flexible. If it is made of a material that has The purpose of this invention is to provide an infrared light irradiation device that allows the operator to detect when the limiter is misaligned and the probe is inserted into the affected area unnecessarily. That is.

[Means for solving problems]

That is, the infrared light irradiation device of this invention includes a probe for deep irradiation of an object to be irradiated, such as an organ, and a probe that is slidably attached to the probe in order to insert the tip of the probe into the object to be irradiated to a predetermined depth. The medical infrared light irradiation device is equipped with a limiter, and the distal end side is located at the proximal end side of the probe in order to emit infrared light oscillated from the infrared light emitting device to the probe via an optical system. a ring body directly or indirectly fixed to a predetermined position of a hand piece connected to the light guide fiber whose proximal end is connected to the distal end of the light guide fiber, or a light guide fiber whose distal end is formed as a probe; a moving body attached to a piece or a ring body so as to be movable along the axial direction of the light guide fiber; an elastic body that constantly biases the moving body in a direction away from the limiter; and detecting means for detecting movement of the probe based on the amount of movement when the probe moves a distance.

[Effect]

For example, the infrared light irradiation device of this invention provides advance notice before the limiter starts its sliding operation, so when the limiter is in a pre-sliding state, it is used to prevent the limiter from moving between the moving body and the handpiece or the ring body. Detecting a positional shift, the detection means operates and outputs a detection signal to the warning means, and the warning means that receives this detection signal lights up a warning lamp, or performs an operation such as sliding a limiter relative to the probe. When a force is applied to a moving body, the detection means is activated by a change in relative position between the moving body and the handpiece or ring body, and outputs a detection signal to the warning means. The warning means to which the detection signal is input can generate, for example, a warning sound or the like to notify the operator etc. that the limiter will start its sliding operation.

〔Example〕

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

FIG. 1 shows an infrared light irradiation device according to this invention, and this infrared light irradiation device includes an infrared light emitting device (not shown) and an infrared light emitted from the infrared light emitting device. A light guide fiber 1 that transmits external light (hereinafter referred to as a laser beam), a grip part 2 provided on the tip side of the light guide fiber 1, a probe 3 attached to the tip of the light guide fiber 1, It includes a limiter 4 attached to the probe 3 near the grip part 2, a detection means 5, and a warning means 6.

The infrared light emitting device has the same configuration as a conventional one, and is composed of an argon or YAG laser oscillator. Note that this infrared light emitting device is not particularly limited to a laser oscillator, as long as it emits near infrared light having a longer wavelength than visible light.

The light guide fiber 1 is for transmitting a laser beam oscillated from a laser oscillator to the probe 3 side, and is made of a quartz fiber or the like.

The grip part 2 inserts the probe 3 side into an organ (not shown) to a certain depth and holds it at that position.
It is for detecting the pre-sliding state and sliding operation of the limiter 4, and includes a movable body 2a that is movable with respect to the light guide fiber 1, and a light guide fiber 1 that is slidable with respect to the movable body 2a. a hand piece 2b fixed to the distal end side and housed within the movable body 2a;
It consists of an elastic body 2c, such as a spring, whose proximal end is fixed to the movable body 2a and whose distal end is fixed to the proximal end surface of the hand piece 2b. The handpiece 2b of this embodiment applies a predetermined operating force (hereinafter referred to as the first operating force) to the moving body 2a, that is, a force that exceeds the maximum static friction force F1 between the moving body 2a and the handpiece 2b. When the moving object 2
When an apparent sliding action is started on the gripping body 2a and a predetermined operating force F2 (hereinafter referred to as the second operating force) exceeding the first operating force F1 is applied, an apparent sliding action is applied to the gripping body 2a. It is designed to slide by a certain amount △l. The elastic body 2c is for applying a predetermined elastic force to the movable body, and is constituted by a push-in spring whose elastic force increases as the amount of compression increases. Note that the first operating force F1 is set to be approximately 0.7 times the second operating force F2, that is, the first operating force F1, when applied to the movable body 2a, is exactly equal to the limiter 4. The first operation force F1 is applied when the tip of the probe 3 starts to insert into the organ 7 or advances inside the organ 7. It suffices if the value is set to a value that is sufficiently larger than the operating force required when moving. Also, the second
The operating force F2 is set so that when it is applied to the movable body 2a, a force is exerted that just causes the limiter 4 to start sliding against the probe 3. Further, in this embodiment, a converging lens is attached inside the hand piece 2b.

Probe 3 has the same configuration as the conventional one,
That is, it is detachable from the handpiece 2b, and the infrared light emitted from the tip is radially diffused to the surroundings. Furthermore, this probe 3
A scale is engraved on the top so that the limiter 4 can be easily positioned.

The limiter 4 is made of silicone rubber or the like, and is attached to the probe 3 so as to be able to slide thereon. Before the limiter 4 starts the sliding operation, the limiter 4 starts the sliding operation to notify the operator that the beginning of the sliding operation is near, that is, that the limiter 4 is in a pre-sliding state. When the front sliding state is reached prior to this, the detecting means 5 detects this state. In addition, the minimum operating force (hereinafter referred to as the third operating force) F3 required to slide the limiter 4 with respect to the probe 3
is a larger value than the maximum static friction force F1 and the second operating force F2, that is, this third operating force is the maximum static friction force and the second operating force when the movable body 2a slides against the handpiece 2b. It is set to a value that is the sum of the elastic forces of the elastic body 2c.

In this embodiment, the detection means 5 includes a first switch 5 which detects and turns on when the moving body 2a starts a sliding motion with respect to the handpiece 2b.
a, and the moving body 2a is △ with respect to the handpiece 2b.
It is comprised of a second switch 5b which detects this movement and turns on when it moves by ₂ or more. The first switch 5a is pressed from above by the handpiece 2b.
The second switch 5b is composed of a normally open switch that operates ON, while the second switch 5b is a piezoelectric element or the like that keeps the handpiece 2b pressed from above in the OFF state until the moving body 2a moves a certain amount, that is, △l. It consists of a normally closed switch using By turning on the first and second switches 5a and 5b, a detection signal and a detection signal are outputted to the warning means 6 side. Further, in this embodiment, the second switch 5b is connected to the laser device side, and is configured such that when the second switch 5b is turned on, the oscillation operation of the laser beam from the laser oscillator is stopped.

The warning means 6 includes a first warning means 6a that lights up a warning lamp in order to inform the operator that the limiter 4 is in a pre-sliding state due to the first operating force F1 acting on the hand piece 2; A second warning means 6b generates a buzzer warning sound to notify the operator that the operating force F2 acts on the hand piece 2 and the limiter 4 has started sliding operation. It goes without saying that the warning lamp and buzzer may be used in reverse. The first warning means 6a is connected to the first switch 5a, and is activated when a detection signal is input. The second warning means 6b is connected to the second switch 5b using a buzzer or the like, and is activated when a detection signal is input.

Next, the operation of the infrared light irradiation device according to this embodiment will be explained using FIG. 2.

First, the grip portion 2 is gripped to bring the tip of the probe 3 into contact with a predetermined position on the surface of the organ 7 (see FIG. 2a).

Then, apply a certain force to the tip of the probe 3 to the organ 7.
It is inserted by pushing it toward the affected area 7a inside. (See FIG. 2b.) Next, when the tip of the probe 3 is inserted to a certain depth, the tip 4a of the limiter 4 comes into contact with the surface of the organ 7. From there, in order to insert the probe 3 further inside, the pushing force is increased and when the force reaches the first operating force F1, that is, when the limiter 4 reaches the forward sliding state, the limiter 4 remains stationary at a predetermined position. As it is, the moving body 2a is connected to the handpiece 2b.
In order to start the sliding operation, the first switch 5a is turned on and the warning lamp of the first warning means 6a lights up, notifying the operator that the tip of the probe 3 has reached the affected area 7a ( (See Figure 2c).

Therefore, while maintaining this state, that is, while checking the lighting state of the warning lamp, the infrared light emitting device can be operated to irradiate the affected area with a laser beam.

In addition, in the event that the operator fails to check this warning lamp, the operator increases the pushing force against the movable body 2a and applies a force that exceeds the second operating force F2, causing the limiter 4 to slide and push in. Sometimes, when the limiter 4 starts sliding, the movable body 2a moves by more than a certain amount △l with respect to the handpiece 2b, so even if the tip of the probe 3 enters a normal part, the laser oscillator cannot be activated in this state. operation is stopped and normal tissue is not irradiated with the laser beam.

Therefore, according to the infrared light irradiation device according to this embodiment, after the tip of the probe 3 is inserted into the organ 7 and the limiter 4 comes into contact with the surface of the organ 7, the tip of the probe 3 is further inserted into the interior. When the push-in operation exceeds the first operating force F1, the limiter 14 enters the pre-sliding state, and the first switch 5a
is turned on, the first warning means 6a is activated, and a warning lamp lights up, allowing the operator etc. to know from this first warning lamp that the tip side of the probe 3 has reached a predetermined depth.

In addition, instead of the hand piece of this embodiment, as shown in FIG. It is also possible to configure it to do so. In this case, numeral 11 is a limiter, 12 is a moving body, 13 is an elastic body,
All of these have the same configuration as in the previous embodiment. Further, reference numeral 14 is a mark printed in red or the like that constitutes the detection means, and when the moving body 12 moves to this position during the pressing operation on the moving body 12, the limiter 11 will start the sliding operation. You can now check it.

〔effect〕

As explained above, according to the infrared light irradiation device according to this invention, after the limiter contacts the organ surface, when the probe is further inserted with a stronger force, the detection means detects this. This system is designed to activate a warning means to notify the outside that the probe tip has reached a predetermined depth within the organ. In addition to being able to reliably irradiate infrared light to the affected area at a predetermined depth, it is also possible to avoid situations such as irradiating normal areas with infrared light and endangering the living body, which has an extremely large practical effect.

Furthermore, in the case where the detecting means side and the infrared light emitting device side are electrically connected and the limiter is configured to stop or suppress the operation of the infrared light emitting device when the limiter slides, It is possible to prevent the occurrence of a situation in which infrared light is irradiated onto normal tissue by overlooking the notification by the warning means.

[Brief explanation of the drawing]

Fig. 1 is a schematic sectional view showing the probe, limiter, handpiece, etc. of the infrared light irradiation device according to this invention, and Fig. 2 a to d show the probe of the infrared light irradiation device according to this invention inserted into the internal organ. FIG. 3 is a schematic sectional view showing another embodiment of this invention. FIG. 4 is a schematic sectional view showing the probe, limiter, handpiece, etc. of a conventional infrared light irradiation device. It is. DESCRIPTION OF SYMBOLS 1... Light guide fiber, 2a, 12... Moving body, 2b... Hand piece, 2c, 13... Elastic body, 3, 10... Probe, 4, 11... Limiter, 5, 14... Detection means .

Claims (1)

[Scope of claim for utility model registration] 1. A probe for deep irradiation of irradiated objects such as organs;
The medical infrared light irradiation device is equipped with a limiter slidably attached to the probe in order to insert the tip of the probe into the irradiated object to a predetermined depth, and the probe is connected to the probe via an optical system. In order to emit infrared light from an infrared light emitting device, a hand piece whose distal end is connected to the proximal end of the probe and whose proximal end is connected to the distal end of the light guide fiber or a guide whose distal end is formed as a probe is used. a ring body fixed directly or indirectly to a predetermined position of the optical fiber; a movable body attached to the handpiece or the ring body so as to be movable along the axial direction of the light guide fiber; A medical device comprising: an elastic body that constantly biases the probe in a direction away from the limiter; and a detection means that detects movement of the probe based on the amount of movement when the moving body moves a predetermined distance in the direction of the limiter. Infrared light irradiation device. 2. The medical device according to claim 1, wherein the detecting means side and the infrared light emitting device are electrically connected to each other in order to control the infrared light emitting device during the sliding operation of the limiter. Infrared light irradiation device.