JPH0898799A - Illumination device - Google Patents

Abstract

PURPOSE: To provide an illumination device capable of obtaining a monitor image of uniform brightness and capable of reducing the cost of a light source device or a video controller and forming an image having a three-dimensional feeling. CONSTITUTION: Optical fibers are embedded in the thick-walled parts of the cylindrical parts of trocars 5, 6, 7 in which forcepses 2, 3 and an endoscope 4 equipped with the camera head 13 connected to a video controller 14 and a monitor device 15 are inserted in a freely detachable manner and connected to optical cables 10, 11, 12 introducing light from the light source of a light source device.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an illuminating device that illuminates the inside of a body cavity during endoscopic surgery represented by laparoscopic cholecystectomy.

[0002]

2. Description of the Related Art In recent years, in operations such as gallbladder (sac) removal surgery or lung tumor removal surgery to remove an affected area in the abdomen, the abdomen is not removed by laparotomy, but the body is removed. A laparoscope is used to puncture a trocar with forceps and an endoscope fitted in several holes, illuminate the affected area under this endoscope, and perform an excision operation while observing the affected area on an external monitor screen. The number of surgery is increasing.

That is, as shown in FIG. 5, a plurality of holes 1a, 1b, 1c are opened in the abdominal wall 1, and trocars 35, 36 in which forceps 2, 3 for operation are fitted so that they can be taken in and out and the abdomen are inserted. Laparoscope 4 which is a kind of endoscope for illuminating and imaging
The trocar 37 and the trocar 37 into which it can be inserted and removed are inserted into the holes 1a, 1b, and 1c of the abdominal wall 1, and surgery is performed while imaging the affected area M while observing this image on the monitor 15. A camera head 13 is attached to the laparoscope 4 fitted in the trocar 37, and the laparoscope 4 and the light source device 9 are attached.
An optical cable 38 is connected between the camera head 1 and
3 and the external video controller 14 include a signal cable 40.
Connected with the trocar 37 and CO _{2 in the} abdominal cavity.
A pipe 41 is connected to the pneumoperitoneum device 39 for feeding gas. Then, the video controller 14 and the monitor
15 is a video signal cable 42, and a video control
A light control signal cable 43 is connected between the laser 14 and the light source device 9. The distal end of the laparoscope 4 is provided with an imaging window and an illumination window so that the inside of the abdominal cavity can be illuminated and an operation can be performed while viewing an image on the monitor 15.

[0004]

When the inside of the abdomen is illuminated by the light emitted from the image pickup section of the laparoscope 4 in the operation of the inside of the abdomen, as shown in FIG. There was a strong tendency for the central part to become brighter and the peripheral part to become darker. If surgery is performed under such a phenomenon, there is a risk that an abnormal bleeding in the peripheral area or a part of the affected area may be missed. Further, due to the non-uniformity of the illumination intensity on the observation screen (affected area and its periphery), it is necessary to have a light control mechanism for suppressing the halation of the central portion of the monitor image and for correcting the darkness of the peripheral portion. There is a problem that the device becomes expensive as much. Furthermore, since the imaging direction and the illumination direction are in the same direction, it is difficult to represent the unevenness of the observation surface, that is, the shadow is poor.

The present invention has been made in view of the above-mentioned problems, and it is possible to obtain a monitor image with uniform brightness and to reduce the cost of the light source device and the video controller. It is an object of the present invention to provide a lighting device that can intentionally create a shadow of unevenness in a body cavity (abdominal cavity) so that a stereoscopic effect can be obtained in an image.

[0006]

SUMMARY OF THE INVENTION In order to solve the above problems, the present invention provides an illuminating device including a camera connected to one or more forceps, a video controller and a monitor device. An illuminating member is embedded in a thick wall portion of a trocar cylinder into which the endoscope and the endoscope are freely inserted and removed, and the illuminating member is connected to an optical cable for introducing light from a light source of a light source device, -It is characterized by irradiating light from an illumination member embedded in the cable.

[0007]

The operation when the illumination device is used as the above means will be described with reference to the accompanying drawings and the reference numerals. Figure 1 during surgery
, Each trocar 5 inserted into the abdominal cavity,
Light is projected from the ends of 6 and 7. That is, surgical scissors, a cutter, etc. are operated at the tips of the forceps 2, 3 and the laparoscope 4 fitted in these trocars 5, 6, 7, but the trocars 5, 6 behind them are operated. Since light is projected from the end portions of 7 and 7, the affected area in the body cavity is evenly illuminated. In other words, the state is the same as when the light is applied to the image pickup target from behind the camera. Therefore, the monitor image also has a uniform brightness, and the affected area in the body cavity and its surroundings are displayed as a clear image. In this way, conventionally, the light source is controlled by the video controller to prevent halo, but this illuminating device can always obtain an image of uniform brightness without halo, which is a troublesome dimming operation. Is unnecessary. Therefore, it is not necessary to provide a light control device in the light source device 9 or the video controller 14.

Further, if a light-shielding plate is arranged so as to be openable and closable in front of the end of each light cable in the light source device, when the illumination is not required for a certain trocar, the unnecessary trocar is used. The light-shielding plate in front of the optical cable introduced into the optical fiber of the cable can be manually or driven by a driving device to shield the light, so that an image rich in shading can be intentionally produced.

If an optical demultiplexer is connected to the main optical cable connected to the light source device, and an optical cable connected to an optical fiber embedded in each trocar is connected to the demultiplexer. Since the light shielding mechanism is unnecessary, the device itself can be manufactured at low cost.

[0010]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Specific embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is an overall configuration diagram of an illuminating device when an operation is performed under an endoscope (laparoscope) according to the present invention. During the operation, the abdominal wall 1 has several holes 1a, 1b, 1
c is drilled, but forceps 2 and 3 are provided in these holes, respectively.
Also, the trocars 5, 6, and 7 into which the endoscope (laparoscope) 4 which is a kind of endoscope is fitted so that it can be taken in and out are inserted.
An optical fiber 8 is embedded in each of these trocars 5, 6, and 7 as described later, and an optical cable 10 for taking in light from a light source device 9 described later is further provided in each optical fiber 8.
11 and 12 are connected. That is, the trocars 5, 6 and 7 having the optical fibers built therein are used as means for guiding the forceps 2, 3 and the laparoscope 4 into the abdominal cavity. In actual surgery, the trocar 5 is inserted into the abdominal cavity from as many directions as possible (usually 3 to 4 directions). Therefore, the affected area M
Will be illuminated from multiple directions like a surgical light. still,
A camera head 13 is attached to the rear portion of the laparoscope 4, and signal cables 16 and 17 are provided between the camera head 13 and the video controller 14 and between the video controller 14 and the monitor 15. Connected by.

FIG. 2 is a vertical sectional view of the trocars 5, 6 and 7. The trocar 5 (other trocars 6 and 7)
Since it is the same, this trocar 5 will be explained)
Alternatively, the cylindrical portion 5a into which the laparoscope 4 is fitted and the cylindrical portion 5
It is formed with the collar portion 5b provided at the end a. As described above, the optical fiber 8 is embedded in the thick portion of the cylindrical portion 5a, and the optical fiber 8 is extended from the flange portion 5b (or the end portion of the cylindrical portion) to the optical cable by the connector 18. 1
Connected with 0. An illumination window 5c is provided at the front end of the cylindrical portion 5a of the trocar 5 so that light is projected from there.

FIG. 3 is a view showing the inside of the light source device 9 for distributing light to a large number of trocars. As described above, several trocars 5 and the like are usually used, but the light for illumination is taken in from one light source device 10. That is, the light cables 10, 11, 12 for transmitting the light guided to the optical fiber 8 embedded in the trocars 5, 6, 7 are provided inside the light source device 9 around the light source lamp (for example, halogen lamp) 19. Collected. A condenser lens 20 is provided around the light source lamp 19.
21 and 22 are arranged and each optical cable 10, 11,
Light is introduced into 12 through these condenser lenses 20, 21 and 22. These optical cables 10, 11, 12
Light-shielding plates 30, 31, and 32 are respectively provided between the light-shielding plate and the condenser lenses 20, 21, and 22 manually or by a driving device (not shown).
It is installed so that the light quantity can be adjusted by automatically moving back and forth within a certain range.

This illuminating device is constructed as described above, and an actual image of the affected area M in the abdominal cavity is sent to the laparoscope 4-camera head 13-video controller 14-monitor 15 by sending a signal. Is displayed. At the time of surgery, as shown in FIG. 1, light is projected from the end portions of the trocars 5, 6, 7 which are inserted into the abdominal cavity. That is, these trocars 5,
At the tips of the forceps 2 and 3 and the laparoscope 4 which are fitted into the needles 6 and 7, surgical scissors and a scalpel are operated, but light is emitted from the ends of the trocars 5, 6 and 7 behind them. Since it is projected, the affected area in the abdominal cavity is evenly illuminated. In other words, the state is the same as when the light is applied to the image pickup target from behind the camera. Therefore, the monitor image also has a uniform brightness, and the affected area in the abdominal cavity and the surrounding area are displayed as a clear image. Thus
In the past, the light source was adjusted by a video controller to prevent halation. However, this lighting device can obtain an image with uniform brightness and no halation, so no troublesome dimming operation is required. Becomes Therefore, the light source device 9
It is not necessary to provide a dimmer on the video controller 14 or the video controller 14.

Further, inside the light source device 9, the optical cable 1
When the shading plates 30, 31, 32 are arranged in front of 0, 11, 12, when the illumination of a certain trocar is unnecessary, the optical cable introduced into the optical fiber of the unnecessary trocar. Since it is sufficient to shield the light by manually driving the light shielding plate in front of the above or by a driving device, it is possible to intentionally create an image rich in shadows.

Trocar used in the lighting apparatus of the present invention
It is more economical to use a reusable type that is made of metal and sterilized and reused. Further, it is of course possible to manufacture a trocar with a carbon dioxide gas (CO ₂ ) valve for the pneumoperitoneum method, which has a simpler structure and can be manufactured at a lower cost by using a lifting type trocar.

Next, when introducing light into the optical fiber 8 embedded in the plurality of trocars 5, 6, 7, each optical cable is used.
Light is distributed by connecting the bulls 10, 11 and 12 to the light source device 9. However, when a conventional single output type light source device is used, as shown in FIG. The optical demultiplexer 24 is connected, and a large number of optical cables are output from the optical demultiplexer 24.
Bulls 10, 11 and 12 may be connected. When the light of a part of the trocar is blocked, the light blocking means may be attached to the optical demultiplexer 24. Such an optical demultiplexer 2
According to No. 4, since the light source device does not need a light shielding mechanism, the device itself can be manufactured at low cost.

[0017]

As described above in detail, according to the illumination device of the present invention, it is possible to obtain a monitor image (endoscopic image) having a uniform brightness at all times even during an operation, so that the operation can be performed reliably. Can be done. Therefore, it is possible to avoid overlooking the surrounding energizing bleeding and the abnormal portion. Further, the light source device and the video controller can be manufactured at low cost, and at the same time, the illumination mechanism (optical fiber) is not required for the endoscope, and the device can be manufactured at low cost. Furthermore, since it is possible to cut off part of the illumination from multiple directions, it is possible to realize a stereoscopic image even with a secondary monitor image by artificially creating the unevenness of the affected area. .

[Brief description of drawings]

FIG. 1 is an overall configuration diagram of an illuminating device when an operation is performed under an endoscope (laparoscope) according to the present invention.

FIG. 2 is a vertical sectional view of a trocar.

FIG. 3 is a diagram showing the inside of a light source device that distributes light to a large number of trocars.

FIG. 4 is a diagram showing a light introducing device in which an optical demultiplexer is connected to an end of a main cable and a large number of optical cables are connected from the optical demultiplexer.

FIG. 5 is a configuration diagram of a lighting device when performing a conventional laparoscopic surgery.

FIG. 6 is an example view of a monitor-screen inside the abdominal cavity illuminated by an illumination device during a conventional laparoscopic surgery.

[Explanation of symbols]

1 Abdominal wall 2, 3 Forceps 4 Laparoscope (endoscope) 5, 6, 7 Trocar 8 Optical fiber 9 Light source device 10, 11, 12 Optical cable 13 Camera head 14 Video controller 15 Monitor 20, 21, 22 Condensing lens 24 Optical demultiplexer 30, 31, 32 Light-shielding plate

Claims (1)

[Claims] 1. Illuminating a thick portion of a cylindrical portion of a trocar into which a single or a plurality of forceps and an endoscope equipped with a video controller and a camera connected to a monitor device are respectively inserted and removed freely. An illuminating device comprising a member embedded therein, the illuminating member being connected to a light cable for introducing light from a light source of a light source device, and irradiating light from the illuminating member embedded in the trocar.