JP2005065872A - Endoscope apparatus - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an endoscope apparatus which effectively removes and discharges a fluid and dirt staying inside of a hood member provided at the tip of an endoscope insertion part. <P>SOLUTION: The endoscope apparatus is provided with the tip hood member 4 at the tip 5 of the endoscope insertion part 6 to be inserted to the lumen. At the tip face 20 of the tip 5 of the endoscope insertion part 6, the apparatus is provided with: an observation optical system incident end 1 provided at a position biased from a shaft center and forceps channel opening part 3 having an air-suction and water-suction function; an air-feeding and water-feeding nozzle 7 for feeding air and feeding water to the incident end 1; and a forward water-feeding opening part 11 for feeding water forward in an area 30 separated from the opening part 3 at the tip face 20 divided by a line combining the incident end 1 and the nozzle 7. The dirt is circulated and by the fluid from the opening part 11 for feeding water forward, and sucked and discharged. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

  The present invention relates to an endoscope apparatus with a hood, and in particular, relates to an endoscope apparatus that can efficiently remove and discharge fluids and dirt remaining in the hood and ensure a good observation field of view.

  In recent years, endoscope apparatuses are used for intraluminal diagnosis, treatment and treatment of affected areas, and the like. This endoscope apparatus includes an elongated insertion portion that is inserted into a lumen and an operation portion that is connected to the proximal end of the insertion portion.

  The insertion portion is formed of a flexible member and has a flexible tube portion having the operation portion connected to the base end, a bending portion including a plurality of bending pieces provided continuously at the distal end of the flexible tube portion, It consists of the front-end | tip part formed with the hard member provided in a row by the front-end | tip of this bending part.

  The operation unit includes a bending knob for bending the bending portion, an eyepiece portion of an observation optical system, a light guide cord connected to an illumination light source, a forceps insertion hole for treatment and treatment, a water supply / air supply switch, water absorption / intake It consists of a switch, a water supply / air supply pump and a connector for connecting a water intake / intake pump.

  The operation unit and the distal end of the insertion unit are connected to an image guide fiber bundle connected to the eyepiece of the observation optical system, a light guide fiber bundle connected to the light guide cord, and a forceps insertion hole. A forceps channel and a water / air supply channel connected to a water / air supply pump connector are incorporated.

  Further, on the distal end surface of the distal end portion of the insertion portion, an observation optical system incident end opening in which the distal end of the image guide fiber bundle is disposed, an illumination optical system exit end opening in which the distal end of the light guide fiber bundle is disposed, A forceps channel opening communicated with the forceps channel and a water / air supply nozzle to which a tip of the water / air supply channel is connected are provided.

  The forceps channel also serves as a water absorption / intake channel, and can be connected to a water absorption / intake pump near the forceps insertion hole of the operation portion.

  When observing the inside of a lumen using the endoscope apparatus having such a configuration and performing treatment or treatment, a subject illuminated with illumination light from the exit end opening of the illumination optical system is clearly observed with the observation optical system. Therefore, it is necessary to keep the closest distance between the subject and the distal end portion of the insertion portion at a predetermined value.

  For this reason, when observing a mucosa that is easy to move and performing treatment or treatment, the distal end portion is maintained at a predetermined value in order to maintain the closest distance between the subject mucosa and the distal end portion. A hood member is provided.

  The hood member provided at the tip portion is formed of a substantially cylindrical hood portion projecting from the tip portion by a predetermined dimension in the observation visual field direction. By bringing the front end of the hood portion into contact with the mucous membrane as a subject, the closest approach distance between the subject and the observation optical system entrance end opening of the distal end portion is secured (for example, see Patent Document 1). .

  On the other hand, in endoscope diagnosis and treatment treatment, in order to secure the field of view of the observation optical system incident end opening, water is supplied and supplied from the water supply / air supply nozzle, and dirt adhered to the observation optical system incident end opening Cleaning such as removal is performed.

  The fluid used for cleaning the entrance end of the observation optical system or the removed dirt is sucked and discharged from the forceps channel opening using the forceps channel.

  Endoscopic observation is performed using the hood member while maintaining the closest distance, and when the observation optical system entrance end opening is cleaned during treatment or treatment, the fluid and filth used for cleaning are contained in the hood member. The retained matter is aspirated and discharged from the opening of the forceps channel to the outside of the lumen through the forceps channel.

  However, the fluid and dirt remaining in the hood member at a position away from the forceps channel opening cannot be effectively removed, and the staying material enters the field of view of the entrance end of the observation optical system to obtain a good field of view. It may not be possible.

For this reason, an endoscope is also proposed in which a hood member provided at the distal end portion of the insertion portion is provided with a discharge port facing the water / air supply nozzle at the distal end portion and the observation optical system incident end opening ( For example, see Patent Document 2).
Japanese Utility Model Publication No. 59-15605. Japanese Utility Model Publication No. 56-75912.

  A water supply / air supply nozzle is provided to clean the observation optical system entrance end opening in an endoscope observation treatment treatment by providing a hood member proposed in Patent Document 1 at a distal end portion of an endoscope insertion portion. The fluid and filth staying in the hood member after the fluid is sprayed from the fluid is sucked and discharged out of the lumen through the forceps channel opening, but as described above, the forceps channel opening that sucks the fluid and filth Since the fluid and dirt staying at the position in the hood member away from the head cannot be removed effectively, the remaining fluid or dirt enters the field of view of the entrance end of the observation optical system and blurs the subject or narrows the field of view. There was a possibility that a malfunction occurred.

  Further, the endoscope apparatus using the hood member proposed in Patent Document 2 has a water supply / air supply nozzle and an observation optical system incident end when an attempt is made to remove dirt and fluid that has entered the hood member. Since the discharge port is provided on the extended line connecting the opening, it is possible to discharge the fluid and dirt that stays in the area formed by the discharge port from the water / air supply noise, but the water / air supply noise Since the fluid and dirt staying outside the area formed by the discharge port cannot be removed effectively, the remaining fluid and dirt enter the field of view of the entrance end of the observation optical system, obscure the subject, There was a possibility that a problem of narrowing occurred.

  The present invention has been made in view of the above circumstances, and has a hood member for maintaining the closest approach distance between the distal end portion of the endoscope insertion portion and the subject, in order to ensure a good observation field of view. It is an object of the present invention to provide an endoscope apparatus capable of effectively removing and discharging fluids and dirt remaining in the hood member when the observation optical system entrance end opening is cleaned.

  In the endoscope apparatus of the present invention, a distal end hood member that protrudes in the observation visual field direction of the endoscope insertion portion is provided integrally or detachably at the distal end portion of the endoscope insertion portion that is inserted into the lumen. In the endoscope apparatus, an observation optical system incident end and a forceps channel opening provided on the distal end surface of the distal end portion of the endoscope insertion portion at a position eccentric from the axial center of the distal end portion, and the observation optical The forceps channel opening on the distal end surface of the distal end portion divided by an air / water feeding nozzle that feeds air / water with respect to the system entrance end, and a line that connects the observation optical system entrance end and the air / water feed nozzle And an opening for forward water supply provided for forward water supply in an area away from the vehicle.

  In the endoscope apparatus of the present invention, the distal end hood member protruding in the observation visual field direction of the endoscope insertion portion can be integrally or detachably attached to the distal end portion of the endoscope insertion portion that is inserted into the lumen. In the provided endoscope apparatus, an observation optical system incident end and a forceps channel opening provided on the distal end surface of the distal end portion of the endoscope insertion portion at a position eccentric from the axial center of the distal end portion, On the extension line of the observation optical system incident end side of the line connecting the observation optical system incident end and the air / water feeding nozzle to the observation optical system incident end, the air / water feeding nozzle for feeding and feeding water And a fluid guiding jetty provided on the inner wall of the tip hood member so that the fluid delivered from the air / water feeding nozzle flows into an area away from the forceps channel opening.

  The endoscope apparatus according to the present invention can efficiently suck and discharge the fluid and filth staying in the distal end hood member, and can ensure the field of view of the incident end of the observation optical system and observe a clear subject.

  The endoscope apparatus of the present invention can effectively remove the fluid and dirt that stay in the distal end hood member that secures the closest distance between the distal end of the endoscope insertion portion and the subject, and ensures the field of view of the incident end of the observation optical system. It has the effect of observing a clear subject.

  Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings. First, a first embodiment of an endoscope apparatus according to the present invention will be described with reference to FIGS. 1 to 3. 1 is a perspective view showing a distal end portion of an endoscope insertion portion provided with a distal end hood member in the first embodiment of the endoscope device according to the present invention, and FIG. 2 is a first view of the endoscope apparatus according to the present invention. The front view which shows the front-end | tip part of the endoscope insertion part which provided the front-end | tip hood member in one Embodiment, FIG. 3 is the cutting line P- in the figure of FIG. 2 in 1st embodiment of the endoscope apparatus regarding this invention. It is sectional drawing of the front-end | tip part of the endoscope insertion part cut | disconnected from P. FIG.

  In the endoscope apparatus according to the first embodiment of the present invention, the distal end surface 20 of the distal end portion 5 of the endoscope insertion portion 6 is provided at a position eccentric from the axial center of the distal end surface 20 of the distal end portion 5. The observation optical system entrance end 1, at least one illumination optical system exit end 2, forceps channel opening 3, air / water supply nozzle 7, front water supply opening 11, and the like are provided.

  A distal end hood member 4 having a substantially cylindrical shape and having a hood protruding from the distal end surface 20 of the distal end portion 5 in the observation visual field direction is integrally or detachably provided at the distal end portion 5 of the endoscope insertion portion 6. .

  The amount of protrusion of the tip hood member 4 from the tip surface 20 of the tip 5 is a length necessary to maintain at least the closest distance between the observation optical system entrance end 1 of the tip 5 and the subject, and The front end portion of the tip hood member 4 is formed in a shape that does not enter the visual field range of the observation optical system input end 1.

  An objective lens is disposed at the observation optical system incident end 1, and the most advanced lens of the objective lens is disposed as the observation optical system incident end 1 of the distal end portion 5. An observation light incident end surface of the image fiber bundle 23 that guides the observation light is disposed on the proximal end side of the endoscope insertion portion 6 of the objective lens. Or it can also be set as the electronic endoscope which has arrange | positioned the image pick-up element in the focus position of the base end side of the endoscope insertion part 6 of the said objective lens.

  An illumination lens is disposed at the illumination optical system exit end 2. On the proximal end side of the endoscope insertion portion 6 of the illumination lens, an illumination light exit end face of the light guide fiber bundle 22 that guides illumination light is disposed.

  The forceps channel opening 3 is inserted with forceps for treatment and treatment (not shown) and communicated with a forceps channel for both water absorption and suction. The forceps inserted into the forceps channel protrudes from the forceps channel opening 3 in the observation visual field direction of the distal end portion 5 to perform treatment or treatment of the affected area.

  The air / water supply nozzle 7 is provided so as to eject a cleaning fluid to the most advanced lens of the objective lens at the observation optical system incident end 1. The air / water supply nozzle 7 communicates with an air / water supply channel (not shown).

  Further, as shown in FIG. 2, the front water supply opening 11 is separated by a straight line AA connecting the observation optical system incident end 1 provided on the distal end surface 20 of the distal end portion 5 and the air / water supply nozzle 7, Within the narrower area of the distal end surface 20 of the distal end portion 5 or the area away from the forceps channel opening 3 serving also as an intake water intake port (area indicated by the oblique lines in FIG. 2) divided by the straight line AA Is installed. The front water supply opening 11 communicates with the front water supply pipe 11 a disposed at the proximal end of the insertion portion 6 from the distal end portion 5, and is connected to the proximal end of the insertion portion 6. It is connected to the water pump connected to the section.

  Operations such as treatment and treatment by endoscopic observation using the endoscope apparatus having such a configuration will be described.

  An endoscope insertion portion 6 provided with a distal end hood member 4 at the distal end portion 5 is inserted into the lumen, and the front end of the distal end hood member 4 is brought into contact with the mucosa, which is an observation site, so that the closest approach distance is obtained. In order to ensure the field of view of the observation optical system entrance end 1 when performing endoscopic observation while maintaining it and performing treatment, treatment, etc., the air / water feed nozzle 7 is connected to the observation optical system input end 1. In addition, air is supplied and water is washed, and the fluid used for the washing and the filth such as the washed residue are sucked from the forceps channel opening 3 and discharged from the inside of the tip hood member 4 to the outside of the lumen. .

  However, the fluid and filth inside the tip hood member 4 stays in the vicinity of the area 30 that is away from the forceps channel opening 3 that sucks and absorbs the fluid and filth, and as shown in FIG. Often occurs.

  For this purpose, a fluid is ejected from the front water supply opening 11 provided in the area 30 and all or a part of the filth remaining in the area 30 is blown away. The discharge becomes possible.

  That is, when the cleaning fluid is ejected from the air / water supply nozzle 7 and the forward water supply opening 11 substantially simultaneously, the fluid from the air / water supply nozzle 7 cleans the objective lens surface of the observation optical system incident end 1, The fluid from the front water supply opening 11 blows away the filth staying in the vicinity of the area 30, whereby the cleaning liquid and the filth in the tip hood member 4 can be efficiently discharged from the forceps channel opening 3.

  As a result, it becomes possible to secure a field of view of the observation optical system and to observe a clear subject image during treatment or treatment by endoscopic observation.

  Next, a second embodiment of the endoscope apparatus according to the present invention will be described with reference to FIGS. 4 and 5. FIG. 4 is a front view showing the distal end portion of the endoscope insertion portion provided with the distal end hood member in the second embodiment of the endoscope apparatus according to the present invention. FIG. 5 is a cross-sectional view of the distal end portion of the endoscope insertion section taken along the cutting line QQ in FIG. 4 in the second embodiment of the endoscope apparatus according to the present invention.

  The configuration of the distal end portion 5 of the endoscope insertion portion 6 of the second embodiment is the same as that of the first embodiment described above. The difference between the second embodiment and the first embodiment described above lies in the tip hood member 4.

  The distal end hood member 4 of the second embodiment is formed in a cylindrical shape, and is used for fluid guidance on the inner wall surface of the hood portion that protrudes from the distal end surface of the distal end portion 5 of the endoscope insertion portion 6 in the observation visual field direction. A jetty 12 is formed.

  This fluid guiding jetty 12 is located on the side of the observation optical system incident end 1 on the extended line connecting the observation optical system incident end 1 and the air / water feeding nozzle 7 provided at the distal end portion 5 of the endoscope insertion portion 6. Is provided. The shape of the jet guide for fluid guidance 12 is an arc drawn in the area 30 from the vicinity of the extended line connecting the air / water feeding nozzle 7 and the observation optical system entrance end 1 with the vicinity of the air / water feeding nozzle 7 as the center. It has become a shape. That is, the fluid jetted from the air / water feeding nozzle 7 to the observation optical system entrance end 1 is guided to flow toward the area 30 along the arc of the jet guide 12 for fluid guidance. Note that the axial thickness of the tip hood member 4 of the fluid guiding jetty 12 is set to a thickness that allows the jet fluid from the air / water feeding noise 7 to flow and guide in the area 30 direction. Further, it is set so as not to enter the field of view of the observation optical system entrance end 1.

  That is, the fluid jetted from the air / water feeding nozzle 7 to the observation optical system entrance end 1 is guided by the arc of the fluid guiding jetty 12 after cleaning the subject lens surface of the observation optical system entrance end 1. While flowing to the 30 side, it circulates along the inner peripheral wall of the tip hood member 4.

  As a result, the cleaning fluid sprayed from the air / water supply nozzle 7 to the observation optical system incident end 1 and the cleaned filth are forcibly separated from the forceps channel opening 3 by the jet guide 12 for fluid guidance. And flows along the inner wall of the tip hood member 4 to absorb and discharge water from the forceps channel opening 3.

  The front water supply opening 11 may not be provided in the area 30, but if the front water supply opening 11 is provided, the fluid guide jetty 12 is ejected from the air / water supply nozzle 7. The fluid that is guided and flowed at the front and the fluid ejected from the forward water supply opening 11 cross-turbulently flow inside the tip hood member 4 so that the remaining of the fluid and filth can be eliminated and the forceps channel opening can be efficiently performed. 3 can absorb and discharge water.

  In the description of the embodiment of the present invention described above, the forceps channel opening 3 sucks and discharges the fluid sprayed from the air / water supply slur 7 and the front water supply opening 11, filth washed with the fluid, and the like. However, it is also possible to provide a water intake / intake opening in the vicinity of the forceps channel opening 3.

  Accordingly, the forceps channel opening is not limited to the case where the forceps insertion opening for treatment treatment and the like are used as both the water absorption and suction openings for fluid treatment, and the forceps channel opening dedicated to forceps insertion for treatment treatment and the like And a channel opening dedicated to water absorption / intake of fluids are also applied individually.

[Appendix]
According to the embodiment of the present invention described in detail above, the following configuration can be obtained.

(Additional remark 1) In the endoscope apparatus which provided the front-end | tip hood member which protrudes in the observation visual field direction of the said endoscope insertion part integrally or detachably at the front-end | tip part of the endoscope insertion part inserted in a lumen | bore ,
An observation optical system incident end and a forceps channel opening provided at a position deviated from the axial center of the distal end portion on the distal end surface of the distal end portion of the endoscope insertion portion;
With respect to the observation optical system incident end, an air / water supply nozzle for supplying air / water,
A forward water supply opening provided for forward water supply in an area away from the forceps channel opening on the distal end surface of the distal end divided by a line connecting the observation optical system incident end and the air / water supply nozzle; ,
An endoscope apparatus comprising:

(Additional remark 2) In the endoscope apparatus which provided the front-end | tip hood member which protrudes in the observation visual field direction of the said endoscope insertion part integrally or detachably at the front-end | tip part of the endoscope insertion part inserted in a lumen | bore ,
An observation optical system incident end and a forceps channel opening provided at a position deviated from the axial center of the distal end portion on the distal end surface of the distal end portion of the endoscope insertion portion;
With respect to the observation optical system incident end, an air / water supply nozzle for supplying air / water,
In an area separated from the forceps channel opening, the fluid sent from the air / water supply nozzle is on an extension line on the observation optical system entrance end side of the line connecting the observation optical system entrance end and the air / water supply nozzle. A fluid guide jetty provided on the inner wall of the tip hood member so as to flow to
An endoscope apparatus comprising:

  (Additional remark 3) The front water supply opening provided in the area away from the forceps channel opening part formed in the front end surface of the front-end | tip part of the said endoscope insertion part formed in the said jetty for fluid guidance The endoscope apparatus according to appendix 2, which is characterized by that.

(Additional remark 4) Endoscope hood member for endoscope which has the protrusion part which protrudes in the observation visual field direction of the said endoscope at the front-end | tip of the insertion part of the endoscope inserted in a lumen so that attachment or detachment is possible In a wearable endoscope,
The objective lens is decentered from the axis of the endoscope tip, and an opening for forward water feeding is provided in the narrower area of the endoscope tip divided by the line connecting the nozzle and the objective lens. Endoscopic device characterized.

(Supplementary Note 5) Endoscope hood for endoscope having a protrusion that is integrally or detachably provided at the distal end of an insertion portion of an endoscope that is inserted into a lumen, and that protrudes in the observation visual field direction of the endoscope In the member,
A protrusion having a shape that allows the fluid delivered from the nozzle to easily flow into the area on the opposite side of the channel opening is provided on an extension of the line connecting the nozzle and the objective lens on the objective lens side. Endoscopic device.

The perspective view which shows the front-end | tip part of the endoscope insertion part which provided the front-end | tip hood member in 1st embodiment of the endoscope apparatus regarding this invention. The front view which shows the front-end | tip part of the endoscope insertion part which provided the front-end | tip hood member in 1st embodiment of the endoscope apparatus regarding this invention. Sectional drawing of the front-end | tip part of the endoscope insertion part cut | disconnected from the cutting line PP in the figure of FIG. 2 in 1st embodiment of the endoscope apparatus regarding this invention. The front view which shows the front-end | tip part of the endoscope insertion part which provided the front-end | tip hood member in 2nd embodiment of the endoscope apparatus regarding this invention. Sectional drawing of the front-end | tip part of the endoscope insertion part cut | disconnected from the cutting line QQ in the figure of FIG. 4 in 2nd embodiment of the endoscope apparatus regarding this invention.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 ... Observation optical system entrance end 2 ... Illumination optical system exit end 3 ... Forceps channel opening part 4 ... Tip hood member 5 ... Tip part 6 ... Endoscope insertion part 7 ... Air supply / water supply nozzle 10 ... Waste 11 ... For forward water supply Opening 20 ... Tip surface Agent Patent attorney Susumu Ito

Claims (2)

In an endoscope apparatus in which a distal end hood member protruding in an observation visual field direction of the endoscope insertion portion is provided integrally or detachably at the distal end portion of an endoscope insertion portion to be inserted into a lumen.
An observation optical system incident end and a forceps channel opening provided at a position deviated from the axial center of the distal end portion on the distal end surface of the distal end portion of the endoscope insertion portion;
With respect to the observation optical system incident end, an air / water supply nozzle for supplying air / water,
A forward water supply opening provided for forward water supply in an area away from the forceps channel opening on the distal end surface of the distal end divided by a line connecting the observation optical system incident end and the air / water supply nozzle; ,
An endoscope apparatus comprising: In an endoscope apparatus in which a distal end hood member protruding in an observation visual field direction of the endoscope insertion portion is provided integrally or detachably at the distal end portion of an endoscope insertion portion to be inserted into a lumen.
An observation optical system incident end and a forceps channel opening provided at a position deviated from the axial center of the distal end portion on the distal end surface of the distal end portion of the endoscope insertion portion;
With respect to the observation optical system incident end, an air / water supply nozzle for supplying air / water,
In an area separated from the forceps channel opening, the fluid sent from the air / water supply nozzle is on an extension line on the observation optical system entrance end side of the line connecting the observation optical system entrance end and the air / water supply nozzle. A fluid guide jetty provided on the inner wall of the tip hood member so as to flow to
An endoscope apparatus comprising:

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