JPH10295626A - Endoscope device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an endoscope device which is inserted into an internal organ or a cavity in the body of a patient for making observation or treatment of a lesion. SOLUTION: An endoscope device to perform observation or treatment upon pressing wide a tissue or a body cavity is composed of a scope 19 having an insertion part 20, body part 21 and observing means, the first 9 and second blade 10 to push wide the tissue or body cavity, and an ecarteur 8 having a screw 12 to open and close the first 9 and second blades 10. At least either of the blades 9 and 10 of the ecarteur 8 is furnished with a channel 16 to lead the insertion part 20 of the scope 19 to the tips of the first and second blades 9, 10 and a scope lock mechanism 18 to fix the scope 19.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an endoscope apparatus for observing or treating a lesion by inserting it into an internal organ or body cavity of a patient.

[0002]

2. Description of the Related Art For example, in an endoscope apparatus in which a hole is made in a part of a patient's head to perform treatment while magnifying and observing a tissue or a lesion in the head with a surgical microscope, a retractable blade that can be opened and closed is used. The one that inserts the retractor to the lesioned part of the brain based on CT tomography, opens the retracting blade inside, and secures space for observation and treatment of the lesioned part is disclosed in
No. 86312.

[0003] Further, a cylindrical tube is provided with a probe having a plurality of tapered leaf-like pieces which can be opened and closed first, and a collar for slidably receiving an endoscope or the like is provided in the probe. After inserting the leaflet of the probe into the lesion in the head based on CT tomography with the tip of the probe closed, the leaflet was spread near the lesion, and the leaflet was inserted through the endoscope inserted into the collar. Japanese Patent Application Laid-Open No. 61-25377 discloses a method of performing a treatment while observing a lesioned part in front of the patient.

[0004] An endoscope provided with a forceps insertion pipe or a forceps tube for guiding forceps detachably is known from Japanese Patent Application Laid-Open No. 61-98233, and an adapter detachable from the endoscope. And a guide portion near the distal end of the adapter for guiding a treatment tool or the like to a target portion is known from Japanese Utility Model Laid-Open No. 2-96101.

[0005]

However, Japanese Unexamined Utility Model Publication No. 60-86312 discloses a structure in which the distal end of the retractor blade is viewed from the proximal side of the retractor with a surgical microscope, and therefore, the tissue located at the tip of the retractor. Can be illuminated and observed with a surgical microscope, but there is a problem in that the side or back of the tissue is not illuminated and cannot be observed. Further, there is a problem that the tissue on the back side, which is overlapped by the tissue and is shaded by the tissue on the near side, is not irradiated with illumination light and cannot be observed.

[0006] Japanese Patent Application Laid-Open No. 61-25377 discloses a method of inserting a leaflet at the tip of a probe into a lesion in the head based on a CT tomogram in a closed state, and then inserting the leaf near the lesion. The lobes are spread, and the lobes are pushed and spread with an endoscope inserted into the collar to observe the tissue or lesion and perform treatment.However, the space that can be secured by the son is small, and There was a problem that the field of view was limited because observation was only possible with a mirror and observation with a surgical microscope was not possible at hand. Also, the space that can be secured with leaf-shaped pieces is narrow,
In addition, there is a problem that the treatment instrument cannot be moved freely because the leaf-shaped pieces interfere, and accurate and safe treatment cannot be performed when bleeding or the like occurs.

Japanese Patent Application Laid-Open No. 61-98233 discloses that
Since the forceps insertion pipe or forceps tube is attached to the outer circumference of the insertion section of the endoscope, if inserted into the space secured by the retractor, the field of view of the surgical microscope that is being viewed from the proximal side by the forceps insertion pipe or forceps tube may be obstructed. There was a problem of blocking the illumination light and creating a shadow. Furthermore, the thickness of the forceps that can be used is limited by the forceps insertion pipe and the tube, and the direction of the forceps is also limited by the position and the direction of the tip of the forceps tube and the forceps insertion pipe. .

In Japanese Utility Model Laid-Open Publication No. 2-96101, the distance between the endoscope and the distal end of the treatment tool in the adapter is increased because the guide portion is attached to the adapter.
For this reason, if the agputer is to be put together with the endoscope in the space secured by the retractor, a larger space is required. In addition, since the guide portion has holes or grooves corresponding to the thickness of the treatment tool to be guided, the thickness of the treatment tool that can be used in combination is limited, or the movement of the treatment tool is limited, which makes it difficult to use. There was a problem.

The present invention has been made in view of the above circumstances. It is an object of the present invention to prevent the side and the back of the tissue from being seen when the space secured by the retractor is viewed through a surgical microscope from the near side. In order to solve the problem of insufficient lighting due to cast shadows and the problem that the space that can be secured even if the tip of the son is opened is too small to move the treatment tool freely, In addition, it provides sufficient illumination without shadows to the side and back of the tissue, which is impossible with an operating microscope, and enables good observation. In addition, the endoscope allows the treatment tool to move freely to perform safe and accurate treatment. A mirror device is provided.

[0010]

According to the present invention, there is provided an endoscope apparatus for observing or treating a tissue or a body cavity by expanding the tissue or body cavity in order to achieve the above object. And a retractor having at least a pair of blades for expanding the tissue or body cavity and operating means for opening and closing the blades, and guiding the insertion portion of the scope to at least one of the blades of the retractor to the tip of the blade. A channel portion and a portion for fixing the scope are provided.

[0011] When performing treatment while observing the retractor blade with a surgical microscope from the hand and illuminating and observing the surgical field from the tip of the blade, that is, near the surgical field, using a scope provided in the blade. Thus, the lighting condition is improved, and it is also possible to observe a portion which cannot be seen even if the operator looks through the surgical microscope.

At the same time, since the opening size of the blade can be changed, the thickness and shape of the treatment tool that can be used are less restricted, and the movement of the distal end of the treatment tool is less restricted. . Thereby, an accurate and safe treatment can be performed.

[0013]

Embodiments of the present invention will be described below with reference to the drawings. 1 to 4 show a first embodiment, FIG. 1 is a longitudinal side view of an endoscope device 1, FIG. 2 is a perspective view of the same, FIG. 3 is a side external view of a retractor 8, and FIG. FIG. 3 is a diagram illustrating a use state of the mirror device 1.

As shown in FIG. 4, the endoscope device 1 is inserted into a patient 3 through a hole 4 formed in the head thereof under the observation of an operating microscope 2. The surgeon observes the lesion 6 with the surgical microscope 2 and the endoscope apparatus 1 through the space secured by the endoscope apparatus 1, and further, uses the treatment port 7 of the endoscope apparatus 1 and the endoscope apparatus 1. A treatment tool (not shown) can be inserted through the secured space to perform an operation on the lesion 6.

As shown in FIGS. 1-3, an endoscope device 1
The first blade 9 and the second blade 10 are provided on the distal end side of the retractor 8, and the second blade 10 is moved from the first blade 9 around a fulcrum 11 provided on the proximal side of the first blade 9.
The first and second blades 9 and 1 rotate with respect to the blade 9.
0 can be closed or opened. The first and second blades 9 and 10 are located near the tip of the fulcrum 11.
An opening / closing screw 12 is provided as operating means for opening / closing the device. The screw tip 13 of the opening / closing screw 12 is the first blade 9
Are mounted rotatably with respect to the
Is screwed to the second blade 10.

Therefore, when the opening / closing screw 12 is rotated,
The tip of the second blade 10 can be opened and closed little by little with respect to the first blade 9. The first on the near side of the fulcrum 11
The rear end of the blade 9 is extended, and as shown in FIG.
An attachment section 15 is provided for attaching to the scope holder 5 to fix the endoscope apparatus 1. The first blade 9 and the second blade 10 have an arc-shaped cross section as shown in FIG. 1B, and are arranged such that their concave sides face each other. In the meantime, a space 15 is formed, and the first and second spaces are formed.
It expands and contracts according to the opening and closing of the blades 9 and 10. A channel 16 extending from the hand to the tip is provided in the first blade 9. As shown in FIG. 2, a scope insertion port 17 and a scope lock mechanism 18 are provided on the hand side of the channel 16 of the first blade 9. Have been.

The scope 19 inserted into the channel 16 of the retractor 8 from the scope insertion port 17 includes an elongated insertion portion 20 inserted into the channel 16, a main body 21 on the hand side, and the scope lock mechanism. And a connecting portion 22 detachably fixed to the connecting portion 18. A camera connecting portion 24 for attaching a TV camera 23 and a light guide connecting portion 26 for connecting a light guide cable 25 connected to a light source device (not shown) are provided on a side portion of the main body 21 of the scope 19.

Further, an objective optical system 27, an image transmission optical system 28 and an eyepiece optical system 29 are provided inside the scope 19, and a light guide fiber 30 is connected to the light guide connecting portion 26 and the distal end of the insertion portion 20 of the scope 19. It is provided to communicate between. As shown in FIG. 1, the first blade 9 has an objective optical system 27 of the scope 19.
, A nozzle 31 provided substantially perpendicular to the longitudinal direction of the scope 19, a water supply / suction channel 32 communicating with the nozzle 31, and a water supply / suction port 33 communicating with the water supply / suction channel 32. ing. A water supply / suction tube 34 connected to a water supply / suction source (not shown) is detachably attached to the water supply / suction port 33.

Next, the operation of the endoscope apparatus 1 configured as described above will be described. Insertion part 20 of scope 19
Is inserted into the channel 16 in the first blade 9 from the scope insertion port 17 of the retractor 8 and the scope lock mechanism 1
At step 8, the connecting portion 22 of the scope 19 is fixed. When the scope 19 is inserted into and fixed to the scope insertion opening 17 of the retractor 8, the distal end of the scope 19 is located near the distal end of the first blade 9, and the surgical field located in front of the retractor 8 from the distal end of the scope 19 is located. Can be illuminated and observed.

When water is supplied or suctioned to the water / suction port 33 via the water / suction tube 34, the outer surface of the objective optical system 27 of the scope 19 or the light guide fiber is transmitted via the water / suction channel 32 and the nozzle 31. 30
The dirt and blood adhering to the tip surface can be washed away by water supply, sucked, and removed, and always brightly illuminated, and a clear image can always be obtained.

On the other hand, when the opening / closing screw 12 of the retractor 8 is rotated, the tips of the first and second blades 9 and 10 are closed, so that the patient is inserted into the head of the patient 3 while suppressing the invasion of the patient 3. be able to. Once the retractor 8 is inserted into the head of the patient 3, the tip of the first and second blades 9, 10 is slowly opened by turning the opening / closing screw 12, so that
The space 15 between the first and second blades 9, 10 expands,
Illumination and observation of the lesion 6 located at the distal ends of the first and second blades 9 and 10 can be performed by the surgical microscope 2 placed near the hand via the treatment port 7 and the space 15. When a treatment tool such as tweezers, an electrode, or a suction tube is inserted through the treatment port 7 and the space 15, the lesion 6 can be treated.

According to the present embodiment, the first and second blades 9 and 10 are opened in the head of the patient 3 and the lesion 6 or the tissue at the tip of the first and second blades 9 and 10 is used for surgery. At the time of observation and treatment with the microscope 2, the first and second blades 9 and 10 are used for the first and second blades 9 and 10.
The operative field can be illuminated and observed from the tips of the blades 9 and 10, that is, from the immediate vicinity of the operative field.

In this way, it is possible to illuminate and observe the tissue which is not visible with the surgical microscope 2, on the side or back of the tissue or behind another tissue, and to insert a treatment tool through the space 15. Therefore, more accurate and safe diagnosis and treatment can be performed.

A water / suction port 33, a water / suction channel 32 provided in the first and second blades 9 and 10,
By supplying or sucking water to the distal end surface of the scope 19 through the nozzle 31, the distal end of the light guide fiber 30 is always brightly illuminated, and the observation image obtained through the objective optical system 27 of the scope 19 can always be kept clear. Further, in the present embodiment, the retractor 8 to the scope 19
Can be removed, so that handling such as cleaning of the device after the operation becomes easy.

FIGS. 5 and 6 show a second embodiment. FIG. 5 is a perspective view of an endoscope device 41, and FIG. 6 is a vertical sectional side view of the same. The endoscope device 41 includes a pair of opposed first blades 42 and second blades 43 facing each other.
The blade 42 includes an insertion portion 44 and a main body 45.

The main body 45 has a camera connecting portion 46, a light guide connecting portion 47, a water supply / suction port 48 and a support portion 4.
9 are provided. The proximal side of the second blade 43 is connected to be rotatable about a fulcrum 50 provided on the support portion 49. On the hand side of the fulcrum 50, an opening / closing screw 51 is a first
It is rotatably attached to the blade 42 and is screwed to the second blade 43. The support 49
Is provided with a mounting portion 53 for detachably fixing the endoscope device 41 to the scope holder 52.

Inside the first blade 42, an observation optical system 57 including an objective lens system 54, an image transmission lens system 55, and an eyepiece lens system 56, and a light guide connecting portion 47 for supplying illumination light.
There is provided a fiber bundle 58 that guides the fiber bundle to the tip of the first blade 42. Further, a nozzle 59 is provided on the first blade 42 in close proximity to the objective lens 54 system, and a channel 60 communicating with the nozzle 59 and a water supply / suction port 48 are provided. A space 61 extending from the hand to the tip is formed between the first blade 42 and the second blade 43, and a forceps port 62 formed by the first blade 42 and the second blade 43 is formed on the hand side of the space 61. Is provided.

Next, the operation of the endoscope device 41 configured as described above will be described. When the opening / closing screw 51 is rotated, the tips of the first blade 42 and the second blade 43 open and close slowly, and accordingly, the first and second blades 42 and 4 respond accordingly.
The space 61 between 3 is also enlarged or reduced.

After the insertion section 44 is inserted into the patient's head with the first and second blades 42 and 43 opened, the endoscope apparatus 41 is opened by opening the first and second blades 42 and 43. Through the forceps port 62 and the space 61, the operating field located beyond the first and second blades 42 and 43 can be illuminated and observed with a surgical microscope (not shown) at hand. In addition, while observing with a surgical microscope, a treatment tool such as tweezers, an electrode, and a suction tube can be inserted into a surgical field located on the first and second blades 42 and 43 through the forceps port 62 and the space 61 to perform treatment. .

When a light guide fiber connected to a light source device (not shown) is connected to the light guide connection portion 47, the illumination light of the light source device is guided from the light guide fiber to the light guide connection portion 47 of the endoscope device 41.
Through the fiber bundle 58 in the first blade 42 of the endoscope apparatus 41, the illumination of the operation field can be performed from the tip of the first blade 42. Further, when the TV camera 63 is connected to the camera connection portion 46 of the main body portion 45 of the first blade 42, the operation at the tip of the first and second blades 42 and 43 from the objective lens 54 system at the tip of the first blade 42. Capture the image of the field,
The image can be transmitted to the TV camera 63 at hand.

When a water supply tube (not shown) connected to a water supply source or a suction tube (not shown) connected to a suction source is connected to the water supply / suction port 48, the nozzle 59 at the tip of the first blade 42 is connected to the outside of the objective lens 54 system. Dirt and blood adhering to the surface and the end face of the fiber bundle 58 can be washed away, sucked, and removed.

According to the present embodiment, since the observation optical system 57 and the fiber bundle 58 for illumination are directly incorporated into the first blade 42, the entire endoscope device 41 is small in size.
It can be lightweight.

FIG. 7 shows a third embodiment, and FIG.
7 is a longitudinal side view of the endoscope device 71, and FIG. 7B is a cross-sectional view taken along line BB. The endoscope device 71 includes an insertion section 72 and a main body section 73. A first transparent blade 76 made of a transparent resin or glass is provided at a distal end of a first blade 74 and a second blade 75 constituting the insertion section 72. Second transparent blade 7
7 are provided integrally. In the first blade 74, an objective optical system 78, an image transmission optical system 79, and an eyepiece optical system 8 are provided.
An illumination optical system 83 including an observation optical system 81 made of zero and a fiber bundle 82 is provided so as to extend from the distal end of the insertion section 72 to the main body 73. The respective distal end surfaces of the objective optical system 78 and the illumination optical system 83 are provided so as to be located near the hand side of the first transparent blade 76.

The first blade 74 has a water supply / suction port 8
4. A nozzle 86 provided near the water supply / suction channel 85 and the tip of the objective optical system 78 is provided.
The nozzle 86 forms a part of the first transparent blade 76 formed of a transparent resin or glass, and is transparent.

Next, the operation of the endoscope 71 configured as described above will be described. From the tip of the observation optical system 81 and the illumination optical system 83 in the first blade 74, the first and second transparent blades 76, 76, the second blade 75, and the first through a space 87 formed by the second transparent blade 77. Illumination and observation of the operative field extending in front of the second blades 74 and 75 can be performed. Further, the light can be transmitted through the first transparent blade 76 and the second transparent blade 77 to illuminate and observe surrounding tissue or a lesion. Water supply / suction port 8
The water fed from the nozzle 5 is sprayed from the nozzle 86 onto the outer surface of the distal end of the objective optical system 78 or the fiber bundle 82 to wash away dirt and blood, or a negative pressure is applied to the water supply / suction port 85 so that the objective optical system 78 and the Water and dirt on the outer surface of the distal end of the fiber bundle 82 can be sucked and removed.

According to the present embodiment, since the first and second transparent blades 76 and 77 are provided at the tips of the first and second blades 74 and 75, respectively.
In addition to the observation of the operative field secured at 4 and 75, illumination and observation of the tissue pushed and spread by the first and second blades 74 and 75 can be performed. For this reason, the surroundings can be seen over a wide area, and the operation can be performed safely.

FIGS. 8 and 9 show a fourth embodiment. FIG. 8 is a diagram showing the use state of the scope 91, and FIG.
It is the front view and side view of the front-end | tip part of FIG. The scope 91 includes an insertion portion 92 and a main body 93, and the main body 93 has a TV set.
An eyepiece section 95 for connecting the camera 94 and a light guide connection section 97 for attaching a light guide cable 96 connected to a light source device (not shown) are provided. The insertion portion 92 is inserted into a patient's head 98 through a hole 99 formed in the head 98. On the other hand, through the hole 99, it is possible to observe the tissue or the lesion 102 at the bottom of the hole and the distal end portion 91 a of the scope 91 with the surgical microscope 100 held at hand.

Further, the treatment tool 101 can be inserted into the hole 99 along the insertion portion 92 of the scope 91 and guided to the lesion 102. As shown in FIG. 9, one or a plurality of wings 104 extending in a wing shape are provided at the distal end 103 of the insertion portion 92 of the scope 91. The outer periphery of the ear portion 104 has a round and blunt shape so as not to damage the tissue even when the ear portion 104 comes into contact with the tissue.
05 is provided. The guide part 105 extends along the edge of the ear part 104 in the lateral direction so as to form an angle with the long axis direction of the insertion part 92 of the scope 91.

Next, the scope 9 constructed as described above is used.
1 will be described. The illumination light is guided to the scope 91 by the light guide cable 96 connected to the light source device, and the tissue and the lesion 102 can be illuminated from the distal end portion 103, and the tissue and the lesion 102 can be observed. By controlling the distal end of the treatment tool 101 by pressing the distal end of the treatment tool 101 against the guide portion 105,
There is no need to worry about camera shake, and stable and reliable control can be achieved.

The guide portion 105 extends at an angle with respect to the long axis of the scope 91.
The treatment can be performed while moving the treatment tool 101 to an arbitrary position in the lateral direction with respect to the one distal end portion 91a. The treatment can be performed while moving the treatment tool 101 not only in the front-back direction but also in the lateral direction, so that the treatment can be performed freely.

FIGS. 10 and 11 show a fifth embodiment. FIG. 10 is an overall perspective view of the scope 111, and FIG. 11 is a side view and a perspective view of the distal end of the scope 111 with a part cut away. As shown in FIG. 10, an eyepiece 1 for connecting a TV camera 113 to a main body 112 of the scope 111.
Light guide connector 11 for connecting light guide cable 115 connected to light source device (not shown) 14
6 are provided. A guide portion 118 is provided at the tip of the insertion portion 117 of the scope 111.

As shown in FIG. 11, the guide portion 118 has a guide inlet 119, a bent inner surface 120, and a guide outlet 1
The guide outlet 121 is inclined so as to form an angle with respect to the long axis direction of the insertion portion 117. The guide outlet 121 also has a scope distal end surface 122 on which distal ends of an observation optical system and an illumination optical system (not shown) of the scope 111 are provided. It is provided at a position that forms substantially the same plane.

Next, the scope 1 constructed as described above is used.
The operation of No. 11 will be described. A flexible treatment tool 123 such as a flexible laser probe or a treatment tool is guided to the distal end along the insertion portion 117 of the scope 111, and is guided to the guide entrance 11.
9, the inner surface 1 is inserted.
At 20, the guide outlet 121 whose direction is bent and inclined in accordance with the long axis direction projects at an angle to the long axis direction of the scope 111.

According to the present embodiment, the insertion section 117 allows the flexible treatment instrument 123 to be connected to the guide section 11 at the distal end of the scope 111.
8, the tip of the treatment tool 123 can be easily observed with the scope 111,
Further, it is easy to guide the treatment tool 123 to a target site.

According to the present embodiment, the following configuration is obtained. (Supplementary Note 1) In an endoscope apparatus for performing observation and treatment by pushing and expanding a tissue or a body cavity, a scope having an insertion portion, a main body, and observation means, and at least a pair of blades and a blade for pushing and spreading the tissue or the body cavity are opened and closed. A retractor having operating means for performing the operation, wherein at least one of the blades of the retractor is provided with a channel portion for guiding the insertion portion of the scope to the tip of the blade and a portion for fixing the scope. Endoscope device.

(Supplementary Note 2) At least one of the blades of the retractor is provided with a pipe for guiding water supply or suction from the hand to the tip, and a nozzle communicating with the pipe and capable of changing the direction of fluid to the tip of the scope. The endoscope device according to claim 1, wherein the endoscope device is provided.

(Supplementary Note 3) In an endoscope apparatus for observing or treating a tissue or body cavity by expanding the tissue or body cavity, a distal end of a main body portion of the scope is provided with a substantially flat blade-shaped insertion portion extending long, and one or more insertion portions are provided. An endoscope apparatus comprising: a substantially flat movable blade provided substantially in parallel with an insertion section of a scope; and an operation section for operating the movable blade to approach or move away from the insertion section is provided in the scope body.

(Supplementary Note 4) At least one of the blades of the retractor is provided with a pipe for guiding water supply or suction from the hand to the tip, and a nozzle communicating with the pipe and capable of changing the direction of fluid to the tip of the scope. 4. The endoscope apparatus according to claim 3, wherein the endoscope apparatus is provided.

(Supplementary Note 5) In an endoscope apparatus for performing observation and treatment by being inserted into a tissue or a body cavity that has been spread, a distal end of the scope is placed at an angle with respect to the longitudinal direction of the scope. An endoscope device provided with an extending guide portion.

According to Supplementary notes 1 to 4, when a tissue or a body cavity is pushed open with a blade to secure a space and the inside is illuminated with a surgical microscope from the near side to perform enlarged observation, tissue that cannot be sufficiently illuminated or observed. By illuminating the side and back side of the or the shaded part from the tip of the scope arranged at the tip of the blade, and by being able to observe from there,
Good lighting and observation can be performed, and safe and accurate surgery can be performed. In addition, since the opening size of the blade can be changed, restrictions on the thickness and shape of the treatment tool that can be used in combination are reduced, and the movement of the distal end of the treatment tool is also less restricted, so that safe and accurate The treatment has become possible.

According to appendix 5, since the positional relationship between the distal end of the scope and the treatment tool can be stably maintained, the treatment can be performed accurately and safely, and the guide portion can be moved in the longitudinal direction of the scope. The distal end of the treatment instrument can be freely moved left and right or back and forth with respect to the long axis direction of the scope, so that safe and accurate treatment can be performed. In addition, since the guide portion extends in the lateral direction with respect to the longitudinal direction of the scope, the treatment can be performed freely without restricting the movement of the distal end of the treatment instrument.

[0052]

As described above, according to the present invention, while the tissue or body cavity is pushed open by the blade to secure a space, the inside is illuminated with a surgical microscope or the like from the near side, and sufficient magnification can be obtained. The side or back of the tissue that could not be illuminated or observed, or the shaded part, is illuminated from the tip of the scope placed at the tip of the blade, and can be observed from there. And accurate surgery. In addition, since the opening size of the blade can be changed, restrictions on the thickness and shape of the treatment tool that can be used in combination are reduced, and the movement of the distal end of the treatment tool is also less restricted, so that safe and accurate There is an effect that treatment can be performed.

[Brief description of the drawings]

FIGS. 1A and 1B show a first embodiment of the present invention, wherein FIG. 1A is a longitudinal sectional side view of an endoscope apparatus, and FIG. 1B is a sectional view taken along line AA.

FIG. 2 is an exemplary perspective view of the endoscope apparatus according to the embodiment;

FIG. 3 is an external side view of the retractor of the embodiment.

FIG. 4 is a use state diagram of the endoscope apparatus of the embodiment.

FIG. 5 is a perspective view of an endoscope apparatus according to a second embodiment of the present invention.

FIG. 6 is a vertical side view of the endoscope apparatus according to the embodiment;

FIGS. 7A and 7B show a third embodiment of the present invention, wherein FIG. 7A is a longitudinal sectional side view of an endoscope apparatus, and FIG. 7B is a sectional view taken along line BB.

FIG. 8 is a use state diagram of a scope showing a fourth embodiment of the present invention.

FIG. 9 is a front view and a side view of a distal end portion of the scope of the embodiment.

FIG. 10 is an overall perspective view of a scope showing a fifth embodiment of the present invention.

FIGS. 11A and 11B are a side view and a perspective view, respectively, of a distal end portion of the scope of the embodiment, partially cut away.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 ... Endoscope apparatus 8 ... Retractor 9 ... 1st blade 10 ... 2nd blade 12 ... Opening / closing screw 16 ... Channel 18 ... Scope lock mechanism 19 ... Scope 20 ... Insertion part 21 ... Body part

Claims (1)

[Claims] 1. An endoscope apparatus for observing or treating a tissue or a body cavity by expanding the tissue or body cavity, comprising: a scope having an insertion portion, a main body, and observation means; and at least a pair of blades and a blade for expanding the tissue or the body cavity. A retractor having operating means for opening and closing, wherein at least one of the blades of the retractor is provided with a channel portion for guiding an insertion portion of the scope to the tip of the blade and a portion for fixing the scope. Endoscope device.