JP2007082767A - Hood for endoscope - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To set a length from a distal end surface from an endo-therapy accessory led out of an endo-therapy accessory insertion channel in a uniform manner, and to prevent the endo-therapy accessory from getting out too much. <P>SOLUTION: A hood 18 for an endoscope formed of an elastomer body such as a silicone rubber comprises a proximal part 19 and an endo-therapy accessory stopper part 20. A fitting opening K<SB>1</SB>where a distal end part 10 of the endoscope is fit is provided in the proximal part 19, and the stopper part 20 is integrally formed with the proximal part 19 in a manner to close a part in front of the periphery of an endo-therapy accessory insertion channel opening 16 while at least an observation window 11 and an illumination window 12 are exposed, and has an insertion opening K<SB>2</SB>for inserting the endo-therapy accessory and an annular locking part 22 at the distal end. Thus, the endo-therapy accessory is inserted in the insertion opening K<SB>2</SB>and is locked at the annular locking part 22. Moreover, for a hood for a bipolar diathermic knife, an electrode part which makes contact with a cylindrical electrode of the periphery of the diathermic knife and is exposed to the outside of the endo-therapy accessory stopper part is provided on the endo-therapy accessory stopper part. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to an endoscope hood, and in particular, to a configuration of a hood that is attached to an endoscope distal end portion and assists treatment with a treatment tool while observing an observation object.

  FIG. 8 shows a configuration of the distal end portion of the endoscope. An illumination window 2 and an observation window 3 are arranged on the distal end surface of the distal end portion 1 of FIG. 4. An objective optical system lens 5 is connected to the observation window 3. In addition, a treatment instrument insertion channel 7 for guiding a treatment instrument such as the high-frequency knife 6 into the body to be observed is disposed.

According to such an endoscope, the light supplied from the light guide 4 is irradiated onto the object to be observed from the illumination window 2, and this object is imaged by the objective optical system lens 5 through the observation window 3. By capturing this image with a solid-state image sensor such as a CCD, an image of the object to be observed is displayed on the monitor. Then, while watching the image on the monitor, for example, a high-frequency knife 6 led out from the treatment instrument insertion channel 7 is used to perform treatment such as incision and excision of the affected area, and surgery.
JP 2003-204919 A JP 2005-204782 A

  By the way, in the conventional endoscope, the length of the treatment instrument led out from the distal end portion 1 through the treatment instrument insertion channel 7 is confirmed by observation (on the monitor) from the observation window 3. If the derivation length of the treatment tool can be automatically set uniformly, the treatment tool can be arranged at a predetermined position in the observation visual field, and treatment can be easily performed. Further, if the treatment tool is put out too much, there is a disadvantage that the treatment tool unnecessarily touches or pushes the object to be observed.

  Furthermore, when performing treatment or surgery using a treatment tool, the treatment tool taken out from the distal end portion 1 may move, and treatment or the like may not be performed smoothly. For example, when the high-frequency knife 6 is used, incision and excision are performed with the high-frequency knife 6 applied to or in close proximity to the affected area while pulling the distal end 1 of FIG. 8 downward in the figure. As indicated by the chain line, the tip of the high-frequency knife 6 may move upward in the figure, or may move in the axial direction as indicated by the arrow, and incision and excision may not be performed smoothly.

  The present invention has been made in view of the above problems, and an object of the present invention is to uniformly set the length from the distal end surface of the treatment instrument derived from the treatment instrument insertion channel and to remove the treatment instrument excessively. An object of the present invention is to provide an endoscope hood for preventing the above-mentioned problem.

In order to achieve the above object, the invention of claim 1 is an endoscope hood that is attached to an endoscope distal end portion in which an observation window, an illumination window, and a treatment instrument insertion channel port are arranged on the distal end surface. A base portion having a fitting hole to be fitted to the side surface of the distal end portion of the endoscope, and at least the observation window and the illumination window of the distal end surface are exposed, and the front portion around the treatment instrument insertion channel port is closed and integrated with the base portion. A treatment instrument stopper portion that is formed and stops the treatment instrument derived from the treatment instrument insertion channel port at a predetermined position is provided.
In the invention of claim 2, the treatment instrument stopper portion includes a through hole (through hole) through which the treatment instrument passes, and a locking portion that is disposed at the distal end of the through hole and engages the distal end surface of the treatment instrument. It is characterized by having.
According to a third aspect of the present invention, the through hole is formed in a thick body provided in the treatment instrument stopper portion.
According to a fourth aspect of the present invention, when the bipolar high-frequency knife is used as the treatment instrument, the treatment instrument stopper is in contact with an electrode disposed on the outer periphery of the bipolar high-frequency knife and exposed to the outside of the treatment instrument stopper. An electrode portion is provided.

According to the configuration of the present invention, for example, the treatment instrument stopper portion is formed by an elastic member, the treatment instrument stopper portion is provided with the through hole of the treatment instrument, and the tip has an annular shape having an inner diameter smaller than the inner diameter of the through hole. It can be set as the hood which formed the latching | locking part. The hood is attached to the distal end portion of the endoscope by the base portion, and the treatment instrument can be stopped and set at the position of the locking portion by inserting the treatment instrument into the through hole of the treatment instrument stopper portion. . Further, the treatment instrument arranged in the treatment instrument stopper portion is in a fixed state, and its movement is also stopped.
According to the third aspect of the present invention, cauterization for incision is performed between the tip needle electrode of the bipolar high-frequency knife and the electrode portion provided on the treatment instrument stopper portion.

According to the endoscope hood of the present invention, it is possible to uniformly set the length from the distal end surface of the treatment tool derived from the treatment tool insertion channel, and to prevent the treatment tool from being taken out excessively. There is an effect that the treatment tool does not unnecessarily touch or push the object to be observed.
In addition, the treatment instrument stopper portion can fix the treatment instrument such as a high-frequency knife derived from the treatment instrument insertion channel so that it does not move, so that treatment such as incision and excision using the treatment instrument and surgery can be performed smoothly. Can do.

  1 and 3 show the configuration of the endoscope hood according to the first embodiment, FIG. 2 shows the configuration of the endoscope hood according to the second embodiment, and FIGS. 5 and 6 show the distal end portion. FIG. 4 shows the configuration of the endoscope front end portion with the hood of the first embodiment attached thereto. First, the configuration of the endoscope front end portion will be described. In FIG. 4, the distal end surface (front surface) 10 </ b> A of the distal end portion 10 has an observation window 11 connected to the internal objective optical system, and two observation windows 11 arranged on the left and right of the observation window 11 and connected to the internal light guide. An air supply / water supply nozzle 14 for injecting air or water toward the observation window 11 and a treatment instrument insertion channel (outlet) port (tip forceps port) 16 are provided. The air / water supply nozzle 14 is connected to an air / water supply pipe disposed inside the endoscope, and the treatment instrument insertion channel 16 is connected to the inlet (operation) of the endoscope operation section. A treatment tool such as a high-frequency knife inserted from the part side forceps port can be led out from the distal end surface 10A into the observed body.

1 and 3, the hood 18 of the first embodiment is formed as a transparent elastic (soft) body from a synthetic resin material (for example, silicon rubber). from an annular base portion 19 having a circular fitting hole K ₁ to be fitted to the side surface, is integrally molded to the base 19, the treatment instrument stopper section projecting forward in a range of about the lower half (the protruding block portion) 20. Composed. That is, as shown in FIG. 5, the treatment instrument stopper portion 20 exposes the observation window 11 and the two irradiation windows 12 (opens the front) and closes the periphery of the treatment instrument insertion channel port 16. a lower thickness is formed so as to protrude to the vicinity of the center (the central axis of the fitting hole K ₁₎ from the body of the base 19 (block body), the thickness d of the longitudinal direction, the treatment portion of the observed ease, In consideration of stable fixation of the treatment tool, it is set within a range of about 3 mm to 10 mm.

The treatment instrument stopper section 20, the treatment instrument is issued from the treatment instrument insertion channel opening 16, for example, through-holes (through holes) K ₂ for passing a high-frequency knife 6 is formed. In the embodiment, the inner diameter (diameter) r ₁ of the through hole K ₂ is set to be equal to or smaller than the outer diameter (diameter) r _{2 of the} high frequency knife 6, for example, the outer diameter of the high frequency knife 6 is 2 because it is about .4Mm, the inner diameter _{r 1} of the through-holes _{K 2} are, 2.4 mm or will set it below (about 2.3 mm). Thus, the high-frequency knife 6 through the through-hole K ₂ can be firmly gripped and fixed by the elastic force of the treatment instrument stopper section 20, the treatment instrument stopper section 20 also functions as a treatment instrument fixing portion.

An annular locking portion 22 having an inner diameter smaller than the inner diameter r ₁ is formed at the tip of the through hole K ₂ of the treatment instrument stopper portion 20, and the annular engagement portion 22 treats the high-frequency knife 6 and the like. The tip surface of the tool is locked. In the embodiment, FIG. 1 (B), the as shown in FIG. 7 or the like, towards the bottom surface of the treatment instrument stopper section 20 from the bottom portion of the rear side of the through-hole K _2, in the through-hole K ₂ suction port K ₃ communicating is formed. That is, the endoscope is configured so that liquid or the like in the observed body can be sucked from the treatment instrument insertion channel port 16, and when the high-frequency knife 6 is attached, suction can be performed from the suction port K _3. It has become.

2 is a configuration of the second embodiment to be applicable to a bipolar high-frequency knife, in this case the second practice, high-frequency knife that communicates from the bottom of the through-hole K ₂ to the lower surface outside of the treatment instrument stopper section 20 An electrode part 23 is provided. That is, as shown in FIG. 7, the bipolar high frequency knife 6 has a tip needle electrode 6A and a cylindrical electrode 6B on the outer periphery of the main body, and the electrode portion 23 comes into contact with the cylindrical electrode 6B to electrically Connected. The other configuration of the second embodiment is the same as that of the first embodiment.

According to such a configuration of the first and second embodiment, by fitting the fitting hole K ₁ of the hood base 19 to the endoscope tip portion 10 of FIG. 4, as shown in FIGS. 5 and 6 The hood 18 (28) is attached to the distal end portion 10. The hood 18 (28) is reliably prevented from falling off by winding a tape or the like around the connecting portion between the hood 18 (28) and the distal end portion 10. Then, after the distal end portion 10 fitted with the hood 18 (28) is inserted into the body to be observed, the high frequency knife 6 led out from the treatment instrument insertion channel port 16 is inserted into the through hole K _{2 of the} treatment instrument stopper portion 20 (30). 6 and 7, the tip surface of the high-frequency knife 6 (the step surface in the second step from the tip in the embodiment) is locked to the annular locking portion 22 as shown in FIGS. The needle electrode 6A is set in a protruding state. That is, by holes K ₂ is extended through by the elastic force of the thick portion of the treatment instrument stopper section 20 and 30, the high-frequency knife 6 of the same or greater outer diameter and the inner diameter of the through-hole K ₂ is inserted and disposed The

Frequency knife 6 was thus arranged is firmly gripped by the through-hole K ₂ small inner diameter of under its outer diameter or less, it becomes a fixed state so as not to move in the axial direction. Further, since the protrusion of the distal end surface is prohibited by the annular locking portion 22, it is possible to prevent the high frequency knife 6 from being taken out excessively, and the tip needle electrode 6 </ b> A of the high frequency knife 6 is unnecessary for the object to be observed. There is also no contact with. Furthermore, since the treatment instrument stopper portions 20 and 30 are formed in a thick body, the high-frequency knife 6 may move due to deformation of the hood itself even if the hoods 18 and 28 are formed of elastic (soft) bodies. Absent. Further, by forming the hoods 18 and 28 with transparent members, it is possible to observe the treatment portion even if a thick body is provided.

  The high-frequency knife 6 includes a monopolar (single electrode) high-frequency knife configured by disposing a body electrode plate (electrode) on the lower side of the patient, and the tip needle electrode 6A on the knife body as in the embodiment. There is a bipolar (two-electrode) high-frequency knife 6 provided with both cylindrical electrodes 6B. In the case of this bipolar high-frequency knife 6, the second embodiment of FIG. 2 can be used.

  FIG. 7 shows a state where the bipolar high-frequency knife 6 is set by the treatment instrument stopper portion 30 of the second embodiment. The cylindrical electrode 6B on the outer periphery of the high-frequency knife 6 is connected to the treatment instrument stopper portion 30. Since it contacts the electrode part 23, it becomes possible to perform the good cauterization action of the high frequency knife 6 between the outside of the electrode part 23 and the tip needle electrode 6A.

  Further, as can be seen from the comparison between FIG. 7 and FIG. 8, the high-frequency knife 6 does not move up and down and left and right (does not swing) by the treatment instrument stopper portion 20. Therefore, even if the distal end portion 10 is moved in the incision direction, the high-frequency knife 6 is maintained at a stable position without moving, and incision and excision can be performed well.

In the above embodiment, as the material of the treatment instrument stopper section 20 has an elastic member, it can also be the treatment instrument stopper section 20 is made of hard synthetic resin, in this case, the inner diameter of the through-hole K ₂ What is necessary is just to make it larger than the outer diameter of a treatment tool. Again, the annular locking portion 22, with the projection of the treatment instrument is stopped at a predetermined position, even a small gap between the through-hole K ₂ and the treatment instrument (play) minute treatment instrument movement, annular locking By engaging the distal end portion of the high-frequency knife 6 in the vicinity of the stop portion 22, it is possible to prevent movement that hinders incision and excision.

  Further, in the embodiment, the treatment instrument stopper portion 20 is provided in a wide semicircular range including the treatment instrument insertion channel port 16, but this treatment instrument stopper portion 20 is provided in the vicinity of the treatment instrument insertion channel port 16 or a thick body. You may limit to the front-end | tip part vicinity.

The structure of the endoscope hood according to the first embodiment of the present invention is shown, in which FIG. (A) is a front (front) view, and FIG. (B) is a sectional view taken along line BB in FIG. The structure of the endoscope hood according to the second embodiment is shown, in which FIG. (A) is a front (front) view, and FIG. It is a perspective view of the hood for endoscopes of FIG. The structure of the endoscope front-end | tip part of an Example is shown, A figure (A) is a front view, A figure (B) is a side view. It is a front view when the food | hood of 1st Example is attached to the front-end | tip part. It is a perspective view when attaching the food | hood of 1st Example to a front-end | tip part, and arrange | positioning a treatment tool. It is sectional drawing which shows a state when attaching the food | hood of 2nd Example to a front-end | tip part, and arrange | positioning a treatment tool. It is a figure which shows the structure of the conventional endoscope front-end | tip part.

Explanation of symbols

1, 10 ... End of endoscope, 10A: End surface,
2,12 ... light window 3,11 ... observation window,
16 ... treatment instrument insertion channel port, 18, 28 ... hood,
19 ... Base, 20, 30 ... Treatment instrument stopper,
22 ... annular locking part, 23 ... electrode part,
K ₁ ... fitting hole, K ₂ ... through hole.

Claims (4)

In an endoscope hood that is attached to an endoscope distal end portion in which an observation window, an illumination window, and a treatment instrument insertion channel port are arranged on the distal end surface,
A base portion having a fitting hole to be fitted to the side surface of the endoscope distal end portion;
The treatment tool formed integrally with the base and closed from the front of the treatment instrument insertion channel port while exposing at least the observation window and the illumination window on the distal end surface and led out from the treatment tool insertion channel port is placed at a predetermined position. An endoscopic hood comprising a treatment instrument stopper portion that is stopped by a step.   The said treatment tool stopper part is provided with the through-hole which lets a treatment tool pass, and the latching | locking part which is arrange | positioned at the front-end | tip of this through-hole, and engages with the front end surface of a treatment tool. Endoscope hood.   The endoscope hood according to claim 2, wherein the through hole is formed in a thick body provided in the treatment instrument stopper portion.   In the case where a bipolar high-frequency knife is used as the treatment instrument, the treatment instrument stopper portion is provided with an electrode portion that contacts an electrode disposed on the outer periphery of the bipolar high-frequency knife and is exposed to the outside of the treatment instrument stopper portion. The endoscope hood according to any one of claims 1 to 3.