JP4512930B2 - Endoscope insertion aid - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to an insertion aid for an endoscope, and more particularly, to an insertion aid for inserting and guiding a hysteroscope used during uterine observation into a uterine cavity.
[0002]
[Prior art]
The hysteroscope is inserted into the uterine body cavity from the outer uterine ostium through the cervix and then into the uterine cavity through the forceps channel or the water supply channel formed in the hard end of the bending part. The perfusate is supplied, and the inner wall of the uterine body cavity is observed and treated in a state where the uterine body cavity is expanded by an appropriate amount with this perfusate.
[0003]
Further, when bleeding from the inner wall of the uterine body cavity during uterine observation with a hysteroscope, the perfusate in the uterine body cavity becomes cloudy and the field of view of the observation field deteriorates. To prevent deterioration of visibility.
[0004]
However, even if the uterine cavity is inflated in an appropriate amount, when the perfusate is continuously supplied, the water pressure due to the perfusate in the uterine cavity gradually increases, and when the water pressure exceeds a predetermined value, There is a problem in that it flows backward from the forceps channel or the water supply channel and leaks from the hand operation part of the hysteroscope to stain the operator's hand.
[0005]
In view of this, the applicant of the present application has proposed a hysteroscope in which a spiral groove is formed on the surface of the curved portion at the distal end of the hysteroscope insertion portion in Japanese Patent Application Laid-Open No. 6-237894. According to such a hysteroscope, when the uterine cavity is expanded by an appropriate amount, the perfusate is discharged from the uterine cavity along the spiral groove formed on the curved surface by the internal pressure of the uterine cavity. However, the above problem does not occur even if it is supplied as a standard.
[0006]
[Problems to be solved by the invention]
However, in the hysteroscope described in JP-A-6-237894, the uterine tissue may enter into the spiral groove formed on the surface of the curved portion and block the spiral groove. There was a drawback that it was difficult to discharge.
[0007]
The present invention has been made in view of such circumstances, and an object of the present invention is to provide an insertion aid for an endoscope that can reliably discharge the liquid in the body cavity.
[0008]
[Means for Solving the Problems]
In order to achieve the above-mentioned object, the present invention has a cylindrical insertion assisting device main body in which an insertion hole into which an endoscope insertion portion is inserted is formed in the axial direction, and the insertion assisting device main body is placed in a body cavity. In the endoscope insertion assisting tool that guides the insertion of the endoscope insertion portion into the body cavity by inserting the fluid into the body of the insertion assisting tool main body, a fluid is provided along the axial direction of the insertion assisting tool main body. A discharge groove is formed, and the diameter of the insertion hole of the insertion assisting tool main body is larger than the diameter of the endoscope insertion portion, and the diameter of the insertion hole on the outlet side is It is characterized by being formed below the diameter of the endoscope insertion portion .
[0009]
According to the first aspect of the present invention, since the fluid discharge groove is formed inside the insertion assisting device main body for guiding the insertion of the endoscope insertion portion into the body cavity, the insertion assisting device main body is placed in the body cavity. Even if inserted, the fluid discharge groove is not blocked by the tissue of the body cavity. Therefore, the liquid in the body cavity can be reliably discharged through the fluid discharge groove.
[0010]
According to the second aspect of the present invention, since the insertion hole formed in the insertion assisting tool main body and the fluid discharge groove are formed in communication, the insertion hole and the fluid discharge groove are formed by a single mold. can do. In addition, since the fluid discharge groove is formed to be smaller than the diameter of the endoscope insertion portion, it is possible to prevent the endoscope insertion portion from falling into the fluid discharge groove.
[0011]
According to the third aspect of the present invention, since the fluid discharge pipe is connected to the insertion assisting tool main body and the fluid discharge pipe and the fluid discharge groove are communicated, the liquid in the body cavity discharged from the fluid discharge groove Can be collected via a fluid discharge pipe and disposed of together. The fluid discharge pipe can also be used as a handle.
[0012]
DETAILED DESCRIPTION OF THE INVENTION
Preferred embodiments of an endoscope insertion aid according to the present invention will be described below in detail with reference to the accompanying drawings.
[0013]
The hysteroscope 10 shown in FIG. 1 has a hand operation part 12, and an insertion part 14 is connected to the hand operation part 12, and a bending part 16 is formed at the distal end of the insertion part 14. The bending portion 16 is bent by turning an operation knob 18 attached to the hand operation portion 12.
[0014]
A distal end hard portion 20 is provided at the distal end portion of the bending portion 16, and an observation window, a forceps channel, a water supply channel, an illumination window, and the like (not shown) are formed at predetermined positions on the distal end surface of the distal end hard portion 20. ing. In addition, a flexible tube 22 is connected to the hand operation unit 14, and a light guide connector 24 is provided at the tip of the flexible tube 22. The light guide connector 24 is connected to a proximal end portion of a light guide (not shown) formed of an optical fiber bundle. The distal end portion of the light guide is a flexible tube 22, a hand operating portion 12, an insertion portion 14, and a bending portion. 16 to the illumination window of the distal end hard portion 20.
[0015]
Reference numeral 26 denotes an eyepiece formed at the rear end of the hand operation unit 12. A base end portion of an image guide (not shown) formed of an optical fiber bundle is connected to the eyepiece portion 26, and the distal end portion of the image guide is connected via the hand operation portion 12, the insertion portion 14, and the bending portion 16. It arrange | positions to the observation window of the front-end | tip hard part 20. FIG. Therefore, the subject image incident from the observation window is observed from the eyepiece unit 26 through the image guide.
[0016]
A liquid feeding port 30 is provided in the joint portion 28 that connects the insertion portion 14 to the hand operation portion 12. As shown in FIG. 2, the perfusate is fed from the perfusate tank 32 through the tube 34 to the liquid feed port 30. The perfusate supplied to the liquid supply port 30 is released to the outside from the forceps channel or the water supply channel of the distal end hard portion 20 via a tube (not shown) disposed in the insertion portion 14 of FIG. The perfusate is used to inflate the uterine body cavity when observing and processing the uterine body cavity.
[0017]
The insertion assisting tool 40 according to the embodiment shown in FIGS. 3 and 4 includes an insertion assisting tool main body 42 and a fluid discharge pipe 44 formed in a cylindrical shape. The insertion assisting tool main body 42 is inserted into the uterine cavity starting from the right end in FIGS. 3 and 4, and is made of a flexible member such as rubber so as not to damage the intrauterine tissue.
[0018]
An insertion hole 46 into which the endoscope insertion portion 14 is inserted is formed in the insertion assisting device main body 42 along the axial direction of the insertion assisting device main body 42, and is a fluid discharging groove that is a drainage groove for perfusate. Similarly, the groove 48 is formed along the axial direction of the insertion assisting tool main body 42. The fluid discharge groove 48 is formed in communication with the insertion hole 46, whereby the insertion hole 46 and the fluid discharge groove 48 are formed using a single mold.
[0019]
As shown in FIGS. 4 and 5, the insertion hole 46 is formed such that the diameter D <b> 1 on the inlet 46 </ b> A side of the insertion hole 46 is larger than the diameter d of the insertion portion 14. Thereby, insertion operation to the entrance 46A of the insertion part 14 becomes easy. Further, as shown in FIGS. 4 and 6, the insertion hole 46 is formed in such a size that the diameter D1 ′ on the outlet 46B side of the insertion hole 46 satisfies D1 ′ ≦ d. As a result, when the insertion portion 14 is inserted through the outlet 46B of the insertion hole 46, the inner peripheral surface of the outlet portion 46B comes into close contact with the insertion portion 14, so that the perfusion fluid is prevented from being discharged (leaked) from the insertion hole 46. As a result, the perfusate is discharged only from the fluid discharge groove 48, so that an excessive discharge amount of the perfusate is prevented and contraction of the uterine body cavity is prevented.
[0020]
The fluid discharge groove 48 is formed in an arc shape, and its diameter D2 is formed to be smaller than the diameter d of the insertion portion 14. This prevents the insertion portion 14 from falling into the fluid discharge groove 48. The fluid discharge groove 48 is formed so that the insertion hole 46 has a smaller diameter as it goes from the inlet 46A to the outlet 46B, and has a larger diameter as it goes from the inlet 46A to the outlet 46B. However, the portion of the fluid discharge groove 48 communicating with the fluid discharge pipe 44 is sufficiently narrowed by being sandwiched between the outer peripheral surface of the insertion portion 14 as shown in FIG. Excessive liquid discharge is prevented.
[0021]
The fluid discharge pipe 44 is formed integrally with the insertion assisting tool main body 42 as shown in FIG. 5, and a drainage passage 50 communicating with the fluid discharge groove 48 is formed therein. Further, a joint portion 45 is formed at the base end portion of the fluid discharge pipe 44 as shown in FIG. 3, and the tube 52 shown in FIG. 4 is connected to the joint portion 45. The tube 52 is connected to a water collection tank (not shown). ing. Therefore, the perfusate discharged from the fluid discharge groove 48 is collected from the fluid discharge pipe 44 through the tube 52 to the water collection tank and is collectively disposed.
[0022]
Next, a method of using the insertion assisting tool 40 configured as described above will be described.
[0023]
First, with the right end portion of the insertion assisting device main body 42 shown in FIGS. 3 and 4 as the head, the insertion assisting device main body 42 is properly fitted to the uterine body cavity 3 from the outer uterine ostium 1 shown in FIG. Insert the amount.
[0024]
Next, the endoscope insertion portion 14 is inserted from the insertion hole inlet 46A of the insertion assisting tool main body 42, and the insertion is performed when the distal end hard portion 20 and the bending portion 16 at the distal end of the insertion portion are positioned in the uterine body cavity 3. The insertion operation of the unit 14 is stopped. At this time, since the diameter D1 on the inlet 46A side is formed larger than the diameter d of the insertion portion 14 as shown in FIG. 5, the insertion portion 14 can be easily inserted into the inlet 46A. Further, as shown in FIG. 6, in the outlet 46 </ b> B, since the inner peripheral surface of the outlet portion 46 </ b> B is in close contact with the insertion portion 14, the insertion portion 14 is stably supported by the insertion assisting tool main body 42.
[0025]
Next, the perfusate is continuously supplied from the forceps channel or the water supply channel of the distal rigid portion 20 to the uterine body cavity 3, and the uterine body cavity 3 is inflated with this perfusate for observation or the like. Until the uterine cavity 3 is expanded by an appropriate amount by the perfusate, the internal pressure of the uterine cavity 3 is low, so that the perfusate supplied to the uterine cavity 3 is not discharged from the fluid discharge groove 48. When the uterine body cavity 3 expands by an appropriate amount, the internal pressure of the uterine body cavity 3 increases, so that the perfusate is discharged from the uterine body cavity 3 to the outside along the fluid discharge groove 48. That is, in the insertion assisting tool 40 of the embodiment, the fluid discharge groove 48 is formed in the insertion assisting tool main body 42. Therefore, even if the insertion assisting tool main body 42 is inserted into the uterine body cavity 3, the fluid discharging groove. 48 is not blocked by uterine tissue. Therefore, the perfusate supplied to the uterine body cavity 3 can be reliably discharged through the fluid discharge groove 48.
[0026]
Further, according to the insertion assisting tool 40, the fluid discharge pipe 44 is connected to the insertion assisting tool main body 42, and the drainage passage 50 of the fluid discharge pipe 44 and the fluid discharge groove 48 are communicated. The perfusate discharged from the water can be collected in the water collection tank via the fluid discharge pipe 44 and disposed of together. The fluid discharge pipe 44 can also be used as a handle.
[0027]
【The invention's effect】
As described above, according to the endoscope insertion aid according to the present invention, the fluid discharge groove is formed inside the insertion aid main body for guiding the insertion of the endoscope insertion portion into the body cavity. Even if the insertion assisting device main body is inserted into the body cavity, the fluid discharge groove is not blocked by the tissue of the body cavity. Therefore, the liquid in the body cavity can be reliably discharged through the fluid discharge groove.
[0028]
Further, according to the present invention, since the insertion hole formed in the insertion assisting tool main body and the fluid discharge groove are formed in communication, the insertion hole and the fluid discharge groove can be formed by a single mold. . Furthermore, since the fluid discharge groove is formed smaller than the diameter of the endoscope insertion portion, it is possible to prevent the endoscope insertion portion from falling into the fluid discharge groove.
[0029]
Further, according to the present invention, the fluid discharge pipe is connected to the insertion assisting tool main body, and the fluid discharge pipe and the fluid discharge groove communicate with each other, so that the liquid in the body cavity discharged from the fluid discharge groove Water can be collected through a pipe and disposed of in bulk. The fluid discharge pipe can also be used as a handle.
[Brief description of the drawings]
FIG. 1 is an overall perspective view of a hysteroscope. FIG. 2 is an explanatory diagram in which a perfusate tank is connected to a liquid feeding port of a hysteroscopic hand control unit. FIG. 3 is a perspective view of an insertion aid according to an embodiment. FIG. 5 is a cross-sectional view taken along line 5-5 in FIG. 4. FIG. 6 is a cross-sectional view taken along line 6-6 in FIG. Explanatory drawing showing the state of observation of the uterus by hysteroscope [Explanation of symbols]
DESCRIPTION OF SYMBOLS 10 ... Hysteroscope, 12 ... Hand operation part, 14 ... Insertion part, 16 ... Bending part, 20 ... Hard tip part, 40 ... Insertion aid, 42 ... Insertion aid main body, 44 ... Fluid discharge pipe, 46 ... Insertion hole , 48 ... Fluid discharge groove

Claims (3)

An insertion hole into which the endoscope insertion portion is inserted has a cylindrical insertion assisting tool body formed in the axial direction thereof, and the body cavity of the endoscope insertion portion is inserted by inserting the insertion assisting tool body into the body cavity. In an endoscope insertion aid that guides insertion into the endoscope,
Inside the insertion assisting tool body, a fluid discharge groove is formed along the axial direction of the insertion assisting tool body ,
The diameter of the insertion side of the insertion hole of the insertion assisting tool main body is formed larger than the diameter of the endoscope insertion portion, and the diameter of the insertion hole on the outlet side of the insertion hole of the endoscope insertion portion An insertion assisting tool for an endoscope characterized by being formed to have a diameter or less . The endoscope insertion assist according to claim 1, wherein the fluid discharge groove is formed to communicate with the insertion hole and to have a width smaller than a diameter of the endoscope insertion portion. Ingredients. The endoscope insertion aid according to claim 1 or 2, wherein a fluid discharge pipe connected to the fluid discharge groove is connected to the insertion aid main body.

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