JPH0773565B2 - Electronic rigid endoscope device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial field of application] The present invention can use a treatment tool having a large outer diameter without increasing the outer diameter of the sheath, and can continuously supply and drain the perfusate. The present invention relates to an electronic rigid endoscope device.

[Problems to be Solved by Prior Art and Invention] In recent years, a treatment instrument in which a small-diameter insertion portion is inserted into a body cavity to observe an organ in the body cavity or the like and which is inserted into a treatment instrument channel when necessary An endoscope that can be used for various treatments is widely used.

The endoscope has a flexible insertion portion, a flexible endoscope capable of observing a target site in a body cavity through a path bent from an oral cavity, etc., and the insertion portion is rigid and substantially linear. There is a rigid endoscope that is inserted into.

Further, recently, various electronic endoscopes using a solid-state image pickup device such as a charge coupled device (CCD) as an image pickup means have been proposed. This electronic endoscope has advantages such as higher resolution than a fiberscope, easy recording and reproduction of images, and easy image processing such as image enlargement and comparison of two screens. .

By the way, in the cystourethroscope for performing the diagnosis and treatment of the bladder or urethra of the rigid endoscope, an optical tube (telescope) and, if necessary, a sheath as a hollow guide tube are inserted. Processing is performed by inserting a processing tool such as a catheter or forceps.

Further, when the above-mentioned rigid endoscope is inserted, a hollow sheath is inserted into the urethra, and the rigid endoscope is inserted by using this sheath as a guide. The perfusate is sent to the surroundings of the affected area through a hollow path between the endoscope and the aspirated and drained fluid so that the perfusate is perfused to expel body fluids that may interfere with observation or diagnosis of the affected area. Will be required. In addition, when excising a hypertrophied prostatic line with a resectoscope having a handle and an optical tube inserted into the sheath, the excised tissue pieces and bleeding blood, etc. can be discharged out of the body together with the perfusate. It may be necessary. In such a case, conventionally, the sheath has a double structure to allow the perfusate to have an inner peripheral surface of an inner sheath having a cylindrical or elliptical cross-sectional shape and a cylindrical or elliptical outer shell inserted through the inner sheath. The outer peripheral surface of the inner sheath and the inner peripheral surface of the outer sheath, which has a cylindrical outer diameter, is inserted through the outer peripheral surface of the inner sheath and the inner sheath. It was designed to be discharged from the perfusion passage formed in the void.

However, as described above, when an optical tube, a treatment instrument or the like is inserted into the inner sheath, and the outer sheath is further covered with the inner sheath to supply and discharge the perfusate, when a treatment instrument with a large diameter is used,
The voids are smaller and the volume of perfusate is smaller. Therefore, when a treatment instrument with a large diameter and a large amount of perfusate are required, the diameters of the inner and outer sheaths must be increased, which causes a problem of increasing pain to the patient.

[Object of the Invention] The present invention has been made in view of the above circumstances, and continuously supplies and discharges perfusate without increasing the diameter of the sheath even when a treatment instrument having a large diameter is used. Can
An object of the present invention is to provide an electronic endoscope apparatus which causes less pain to a patient.

[Means and Actions for Solving Problems] An electronic rigid endoscope apparatus of the present invention is a flat type, which is provided continuously with a distal end portion provided with a solid-state imaging device as an imaging means and behind the distal end portion. An electronic rigid endoscope having an insertion section having a thinly formed partition section, and a sheath having a hollow section which is inserted through the insertion section and is axially divided into two by the partition section. is there.

That is, a partition is formed on the base side of the insertion part by using a solid-state imaging device as the imaging means, and the hollow part in the sheath is divided into two parts by the partition part, and at least one of the two divided hollow parts is a treatment tool. And the passage.

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

1 to 4 show a first embodiment of the present invention.

In this embodiment, the present invention is applied to an electronic resectoscope.

In FIG. 1, an electronic rigid endoscope apparatus 1 includes an electronic resectoscope 2, an elongated hollow sheath 3, and a light guide and a signal which are detachably connected to a rear end portion of the electronic resectoscope 2. A cable 4, a control device 6 connected to the electronic resectoscope 2 by the light guide and signal cable 4 and having a light source section and a video signal processing section, and a video signal from the control apparatus 6 are input. It is composed of a monitor 7 capable of displaying an observation image.

The electronic resectoscope 2 has a sheath body 8b in which an elongated hollow tube portion 8a to be inserted into the urethra is connected in front, a handle 9 connected to the sheath body 8b, and the handle 9
To the electrode device 11 inserted into the hollow tube portion 8a.

The hollow tube portion 8a has an insulating beak 12 continuously provided at its tip. The hollow tube portion 8a may be integrally formed with the insulating beak 12 with an insulating material.

The sheath body 8b has a water supply port 14 with a cock 13 for supplying the perfusate into the bladder through the hollow tube 8a, and drains the supplied perfusate through the suction hole 16 and the hollow tube 8a. Cock 17
It has a drainage port 18 with a handle and a connecting portion 19 of the handle 9.
Has a fitting port 21 for fitting the
An attachment / detachment button 22 for engaging / disengaging a click mechanism for fixing the inside of 21 is provided.

In front of the connecting portion 19 provided on the handle 9, a hollow tube portion 8a is inserted into the hollow tube portion 8a, and an insertion portion 23 extending to the inside of the distal end of the hollow tube portion 8a is provided. The connecting portion 19 of the handle 9 is
A hollow guide shaft 24 is provided to project rearward in the axial direction, and a slider stopper 26 is fixed to the rear end of the guide shaft 24. On the other hand, a slider 27 that slides in the axial direction along the guide shaft 24 is disposed between the connecting portion 19 and the slider stopper 26, and this slider 27 is, for example, by a spring 28 that is installed between the connecting portion 19 and the slider. The spring 28 is urged so as to come into contact with and return to the slider stopper 26. Note that the spring 28 is a leaf spring in the illustrated example, but may be a coil spring or may not have a spring. Also, the handle 9
The connecting portion 19 is provided with finger hooks 29 and 31 projecting from above and below, and the slider 27 also has a thumb hook 32 below and rearward thereof.

The slider 27 has an electrode device fixing portion 33 into which the electrode device 11 is inserted from the front and is detachably fixed, and for supplying a high-frequency current from a high-frequency ablation power supply (not shown) to the connected electrode device 11. The connector 34 of is projected. The electrode device 11 fixed to the slider 27 and projecting forward is projected forward through an insertion hole (not shown) formed in the connecting portion 19 of the handle 9.

The electrode device 11 is composed of, for example, a cutting tip electrode 36 having a looped end and a shaft portion 37.
Is energized with high-frequency current to excise the affected area (prostate, etc.),
It is designed to perform an incision or stop the bleeding. Various shapes and configurations of the ablation tip electrode 36 are used other than the illustrated example.

In FIG. 3, the insertion portion 23 of the handle 9 is formed by a large-diameter tip portion 38 and a flat partition portion 39 which is continuously provided behind the tip portion 38.

The partition part 39 is axially arranged in the hollow tube part 8a of the sheath 3.
The divided part is divided into a passage 41 through which a treatment tool such as the electrode device 11 can be inserted and can supply a perfusate, and an upper part is formed as a drainage channel 42 for draining the perfusate. Further, the distal end portion 38 is formed by cutting out a part of the outer circumference on a cylinder to form a flat surface portion 78, and the water feeding space 79 formed by the flat surface portion 78 and the inner surface of the sheath 3 is the insertion member 41. It is designed to communicate. Further, the front part of the drainage channel 42 is closed. This drainage channel 42 is the hollow pipe section.
The suction holes 16 provided in the 8a are communicated with each other so that, for example, the perfusate supplied into the body cavity can be drained to the outside of the body cavity. Further, as shown in FIG. 3A, the tip portion 38 is provided with groove portions 82, 82 for accommodating the cutting tip electrode 36 formed at the tip portion of the electrode device 11 inserted into the insertion passage 41 on the left and right sides. The ablation tip electrode 36 can be fixed by the grooves 82, 82.

In FIG. 2, a lens frame 44 for holding an observing optical system is provided on the tip end side of the tip end portion 38, and a cover glass 46 is provided at the tip end of the lens frame 44. An objective lens system 45 as an image forming optical system is attached to this by an adhesive or the like. A solid-state image sensor (hereinafter, abbreviated as CCD) 48 positioned by a spacer 47 is provided at an image forming position behind the objective lens system 45, and the CCD is further provided.
On the back side of 48, an amplifier section 49 that amplifies the electric signal obtained by this CCD 48, a drive pulse of this CCD 48, and a CCD 48
A signal line 51 capable of transmitting the electric signal obtained by the above is connected. Further, the emission end face of the light guide 43 that can illuminate the observation site is provided on the tip end face of the tip end portion 38 so that the illumination light can be emitted.

The light guide 43 and the signal line 51 in the insertion portion 23 are further extended in the hollow guide shaft 24 behind the handle 9, and an electric socket provided at the rear end of the slider stopper 26 and a light guide entrance. It is connected to a light guide and signal connector 52 having an end. Further, the light guide and signal cable 4 having flexibility can be connected to the light guide and signal connector 52 through a connector receiver 53. The light guide 43 and the signal line 51 are extended. A connector 54 is provided at the other end of the light guide and signal cable 4, and the connector 54 has an electrical socket 54a and an illumination socket 54b.
And are provided.

Control device 6 with built-in light source unit 56 and video signal processing circuit 57
Has an electrical system connector receiver 58 and an illumination system connector receiver 59 so that the sockets 54a and 54b of the connector 54 can be connected. Further, a monitor 7 as a display means is connected to the control device 6.

FIG. 4 is a block diagram of a frame sequential video signal processing circuit.

In FIG. 4, a light source unit provided in the control device 6
Reference numeral 56 includes a light source lamp 60 and a rotary color filter 62 having color transmission filters of three primary colors of red, green and blue (not shown). The rotary color filter 62 is rotationally driven by, for example, a stepping motor 63.
Then, the illumination light of the light source lamp 60 is sequentially converted into light of red, green, and blue wavelengths through the rotary color filter 62,
The light is condensed by the condenser lens 61, is emitted from the tip of the insertion portion 23 of the handle 9 through the light guide and the light guide 43 in the signal cable 4, and illuminates the observation site in color plane order. There is.

The reflected light corresponding to each of the red, green, and blue color lights from the observation part is transmitted through the objective lens system 45 and received by an image area of an imaging chip (not shown) embedded in the CCD 48. . Output signals from the image area of the image pickup chip (not shown) are sequentially output from the CCD 48 in the lateral direction, for example, in response to a clock signal applied from the drive circuit 64. The electric signal containing this image information is sent to the amplifier section 49.
The sample-and-hold circuit 66 extracts the video signal, and the γ-correction circuit 67 further γ-corrects it, and then the A / D converter 6
Converted to digital signal at 8. This electric signal is repeated by the multiplexer 69 in synchronism with the color plane sequential illumination, and is sequentially stored in the R frame memory 71, the G frame memory 72 and the B frame memory 73 corresponding to the respective colors of red, green and blue. . The frame memories 71, 72, 73 are simultaneously read out in the horizontal direction at a speed matched with the monitor 7, converted into analog signals by the D / A converters 74, 76, 77, respectively.
It becomes R, G, B color signals. Then, the R, G, B signals are sent to the monitor 7.
The observation site is color-displayed by inputting into.

As described above, in the electronic endoscope system 1 of the present embodiment, the flat partition 39 is provided in the insertion portion 23 in which the light guide 43 and the signal line 51 are inserted, and the inside of the hollow tube portion 8a of the sheath 3 is provided. Is divided into two in the axial direction to form an insertion passage 41 and a drainage passage 42, and the hollow pipe portion 8a
Since the gap between the insertion section 23 and the insertion section 23 is made larger than in the conventional case, it is possible to use a treatment instrument having a larger diameter than the conventional one without making the hollow tube section 8a thicker. Further, since the perfusate is supplied to the insertion passage 41 and the perfusate is continuously discharged from the drainage channel 42, the perfusate can be continuously supplied, and the observed state of the affected area can be excellently observed.

FIG. 5 is a modification of the above-described first embodiment and is an explanatory diagram for explaining a video signal processing circuit of an electronic scope that employs the simultaneous system.

In this modification, the color mosaic optical filter 8 is provided on the front surface of the CCD 48 arranged at the image forming position of the objective lens system 45.
6 are provided.

On the other hand, in the control device 6, the mosaic process circuit 87
And a light source device 88. The light source device 88 includes a light source lamp 60 and a condenser lens 61. The white light emitted from the light source lamp 60 is the condensing lens.
A light guide 43 which is condensed by 61 and is composed of the light guide and the fiber bundle in the signal cable 4.
And is emitted from the tip of the insertion portion 23 of the handle 9 to prove the observation site. The white light reflected from this observation site passes through the objective lens system 45, and the CCD 48
The color mosaic type optical filter 86 arranged in front of the light is split into each color of red, green and blue.
The light split into each of the colors red, green and blue is received by the image area of the imaging chip. The electric signal containing the image information from this imaging chip is sent to the drive circuit 64.
The signals are sequentially output, for example, in the horizontal direction in synchronization with the clock signal applied from the. The electric signal is amplified by the amplifier section 49 and input to the luminance signal processing circuit 89 and the color signal reproducing circuit 91. The luminance signal processing circuit 89 generates a luminance signal Y, and the color signal reproducing circuit 91 generates color difference signals RY, B-.
Y is generated in time series for each horizontal line, and white balance compensation is performed by the white balance circuit 92. The output of the white balance circuit 92 is branched, one of which is input to the analog switch 95 and the other of which is the 1H delay line 93.
Is delayed by one horizontal line and input to the analog switch 94, and the analog switches 94 and 95 are switched by a switching signal of a timing generator (not shown) to generate color difference signals RY and BY. The luminance signal Y and the color difference signals RY and BY are the NTSC encoder 96.
Are multiplexed and input to the monitor 7, and the observed region is displayed in color.

Other configurations, operations and effects are similar to those of the first embodiment.

6 and 7 show a second embodiment of the present invention.

In this embodiment, the present invention is applied to an electronic rigid endoscope device.

The electronic rigid endoscope 99 of this embodiment is used in combination with the sheath 101. As shown in FIG. 7, the sheath 101 is, for example, an elongated hollow tube portion having a substantially circular cross section.
An opening 102 for observation and for a treatment tool is formed at the tip of this hollow tube 103 from the tip to the upstream side. Also, at the rear end of the sheath 101,
A connecting portion 10 for detachably connecting the electronic rigid endoscope 99.
4 are provided. The perfusate is sheathed at this connection 104.
There is a water supply port 106 that can supply water inside 101, and the cock
The water supply port 106 can be opened and closed by 107. Further, a drain port 108 for draining the perfusate supplied from the water supply port 106 is provided, and the drain port 108 can be opened and closed by a cock 109.

On the other hand, the electronic rigid endoscope 99 includes a hard and elongated insertion portion 23 that is inserted into the hollow tube portion 103 of the sheath 101, and an operation portion 112 that is connected to the rear end of the insertion portion 23. At the front end portion of the operation portion 112, a tapered portion 113 having a small diameter on the distal end side that is fitted into the connection portion 104 of the sheath 101, and a connection portion 114 that is adjacent to the rear portion and is connected to the connection portion 104. And are provided. Further, on the rear end side of the operation unit 112, a wire operation knob 116 and a light guide base 117 also serving as a signal connector are provided. The light guide base 117 has a light guide cable 11 in which a signal cable is inserted.
8 is designed to be connected. The ride guide cable 118 is connected to a control device (not shown) having a light source device and a signal processing circuit built therein.

Further, the operation portion 112 has a treatment instrument insertion portion 121 having an insertion opening 120 into which the soft treatment instrument 125 can be inserted.
It is provided so as to be branched obliquely rearward with respect to the axial direction of 23. The insertion port 120 can be opened and closed by a cock 120a.

The insertion portion 23 includes a large-diameter tip portion 122 and a flat partition portion 39 that is continuously provided behind the tip portion 122. The partition portion 39 is located at the center of the hollow tube portion 103 of the sheath 101 so as to divide the inside of the sheath 101 into two in the axial direction, and the tip portion 122 is divided into two by the partition portion 39. It is formed so as to close the tip side of one of the spaces.

The tip 122 includes a rigid tip body 124. At the tip of the tip body 124, the opening 10 of the sheath 101 is provided.
An inclined opening 126 is formed on the second side, and the cover glass 128 and the light guide (fiber) 43 are formed in the opening 126.
And the tip of the. Inside the distal end portion main body 124, diagonally forward so as to face the cover glass 128 and have a predetermined viewing angle with respect to the axial direction of the insertion portion 23 corresponding to the opening 102 of the sheath 101. The objective lens system 129 set in the direction is stored. A CCD 48 is arranged at the image forming position of the objective lens system 129.

As shown in FIG. 7, a light guide is provided in the partition 39.
43 and the signal line 51 connected to the CCD 48 are inserted,
Further, the partition 39 divides the inside of the sheath 101 into two. One of the two divided spaces forms an insertion passage 41 through which a treatment tool and the like can be inserted, and the opening 102 is made to communicate with the water supply port 106 and the treatment tool insertion port 120. Further, the other space divided into two forms a drainage channel 42 capable of discharging the perfusate, and the sheath 101 is provided behind the distal end portion 122.
The suction hole 16 provided on the outer periphery of the suction port 16 for sucking the perfusate and the drain port 108 are made to communicate with each other.

Further, in this embodiment, the distal end portion 122 is the sheath 1
A treatment tool raising device (also called a hebel) is provided on a side portion corresponding to the opening 102 of 01. 131 is provided. This treatment instrument raising device 131 has a tip 133 which is rotatable about a rotation shaft 132, and a raising table 133 which is connected to the raising table 133 and which rotates the raising table 133, for example, two operation wires 134. It has and. The operation wire 134 is connected to the wire operation knob 116. Then, by rotating the wire operating knob 116, the raising base 133 is rotated to raise the distal end side of the soft treatment instrument 125, and the distal end portion of the soft treatment instrument 125 is located at the method position of the distal end portion 122. The opening 102 of the sheath 101
It can be projected laterally from.

According to the configuration of this embodiment, it is possible to perform treatment with the soft treatment instrument 125 while continuously perfusing the perfusate.

Other configurations, operations and effects are similar to those of the first embodiment.

FIG. 8 shows a third embodiment of the present invention.

The electronic rigid endoscope 136 of this embodiment is used in combination with the sheath 137. The sheath 137 has, for example, an elongated hollow tube portion 138 having a substantially circular cross section, and an opening 139 for observation and treatment tools is provided at the tip of the hollow tube portion 138.
Are formed. At the rear end portion of the sheath 137, a connecting portion 141 to which the electronic rigid endoscope 136 can be detachably connected is provided. The connection part 141 is provided with a water supply port 142 for supplying the perfusate into the sheath 137, and the cock 143 allows the water supply port 142 to be opened and closed. Further, a drain port 144 is provided for draining the perfusate from the water feed port 142, and the drain port 144 can be opened and closed by a cock 146.

The insertion portion 23 of the electronic rigid endoscope 136 which is inserted through the sheath 137 is provided with the distal end portion 38 and the partition portion 39 as in the first embodiment, and the partition portion 39 is as shown in FIG. Sheath 137
The inside is divided into two to form an insertion passage 41 and a drainage passage 42.
An operating portion 147 is continuously provided at a rear end portion of the insertion portion 23, and a connecting portion 148 provided at a front end portion of the operating portion 147 is provided with the sheath.
It is fitted into the connecting portion 141 of 137 and is detachably connected. A light guide cable 118 having a signal cable inserted therein is connected to a side portion of the operation unit 147. Furthermore,
At the rear end of the operation portion 147, a hard treatment instrument 149 can be inserted in parallel to the axial direction of the insertion portion 23, and a treatment instrument insertion portion 151 having an insertion port 120 communicating with the insertion passage 41 is provided. It is provided. The treatment instrument insertion portion 151 is provided with a cock 150 that can open and close the insertion port 120.

In this embodiment, the insertion portion 41 and the treatment instrument insertion port 120 communicate with each other,
Furthermore, since the treatment tool can be inserted through the treatment tool insertion port 120 in the axial direction of the insertion portion 23, the treatment with the hard treatment tool 149 can be performed while performing continuous perfusion of the perfusate.

[Effects of the Invention] As described above, according to the present invention, a partition portion is provided on the base side of the tip end portion provided with the solid-state image pickup device as the image pickup means, and the inside of the sheath is divided into two parts, whereby a large diameter is obtained. Even when using a treatment tool, without increasing the diameter of the sheath,
The perfusate can be continuously supplied and discharged, and the pain to the patient can be reduced.

[Brief description of drawings]

1 to 4 relate to a first embodiment of the present invention.
FIG. 1 is a block diagram of the entire electronic resectoscope, FIG. 2 is a detailed view of part A of FIG. 1, FIG. 3 (a) is a sectional view in the B direction of FIG. 1, and FIG. FIG. 4 is a block diagram of a video signal processing circuit of a frame sequential system, FIG. 5 is a modification of the first embodiment, and is a block diagram of a video signal processing circuit of a simultaneous system. FIG. 6 relates to a second embodiment of the present invention,
FIG. 7 is a structural view of a rigid electronic endoscope apparatus, FIG. 7 is a sectional view in the D direction of FIG. 6 and a sectional view in the E direction of FIG. 8, and FIG. 8 is a third embodiment of the present invention. It is a block diagram of a mirror device. 1 ... Electro-hard endoscope system 2 ... Electron-reject scope 3 ... Sheath, 11 ... Electrode device 23 ... Insertion part, 38 ... Tip 39 ... Partition part, 41 ... Insertion passage

Claims (1)

[Claims] 1. An electronic rigid endoscope including an insertion portion having a tip portion provided with a solid-state image pickup device as an image pickup means, and a partition portion continuously provided behind the tip portion and having a flat and thin shape. A sheath having a mirror and a hollow portion which is inserted through the insertion portion of the electronic rigid endoscope and is axially divided into two by the partition portion, and at least one of the two divided portions can be used as an insertion passage of the treatment instrument. And an electronic rigid endoscope device characterized by including: