JP2011245012A - Mounting assisting tool of hood for endoscope - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an assisting tool for smoothing attaching work of an endoscope to a hood, wherein the tool does not require a restoring force for widening the inner diameter of the hood and time and effort to cut the tool can be omitted to separate the tool from the endoscope in the inner surface side after the hood is attached.SOLUTION: The assisting tool 10 includes an insertion portion 11, a guiding portion 12 and a ring 13 which are provided from the front end to the base end. The insertion portion 11 consists of a plurality of claws 20 and is inserted into a hood 25. An opened portion 15 is provided on the base end side of the guiding portion 12, is opened to a side and receives the front end of an endoscope 29 to the guiding portion 12. A cylindrical portion 14 consists of the insertion portion 11 and a front end side portion of the guiding portion 12, and is elastically deformed in a circumferential direction so that a separation width of a separation portion 16 can freely change.

Description

  The present invention relates to an auxiliary tool used when a cylindrical hood is attached to a distal end portion of an endoscope.

  Patent Document 1 discloses an auxiliary tool used when a balloon is attached to the distal end portion of an endoscope. The assisting device has a tweezers structure (see FIG. 2 of Patent Document 1), and an operator presses the assisting device from both sides to squeeze both ends of the distal end portion and insert the distal end portion into the end opening of the balloon. (See FIG. 3 and FIG. 4 of Patent Document 1). When the operator releases the operating force, both ends of the distal end portion are opened by restoring force, and the end opening of the balloon is elastically expanded to both sides (FIG. 5 of Patent Document 1), and the distal end portion of the endoscope Is smoothly inserted into the balloon from the widened end opening (see FIGS. 7 and 8 of Patent Document 1).

  Patent Document 2 also discloses an auxiliary tool used when a balloon is attached to the distal end portion of the endoscope. The auxiliary tool is formed by punching a sheet having a predetermined rigidity such as Kent paper (see FIGS. 2 and 3 and paragraph 0023 of Patent Document 2). The assisting tool is folded in half and then inserted into the balloon tube from the tapered portion of the tip, and further, the tip of the endoscope is extended to the end of the assisting tool opposite to the balloon. (Refer to FIG. 4, FIG. 5 and FIG. 6 in Patent Document 2 in that order). As a result, the auxiliary tool swells into a cylindrical shape in which a previously attached fold line becomes a mountain fold, widens the cylindrical portion of the balloon, and introduces the distal end portion of the endoscope into the cylindrical portion (Patent Document) 2 and FIG. 7 and FIG. 8).

  Patent Document 3 starts an auxiliary tool used when a hood is attached to the distal end portion of an endoscope. The auxiliary tool is inserted into the hood from the distal end side of the hood (see, for example, FIG. 18 of Patent Document 3), whereas the distal end portion of the endoscope is inserted into the hood from the proximal end side of the hood. By abutting on the auxiliary tool, it is positioned correctly (see, for example, paragraphs 0102 to 0104 in Patent Document 3).

JP 2009-131398 A JP 2009-28350 A Japanese Patent No. 3645224

  The assisting tool of Patent Document 1 requires a large restoring force that widens the end opening of the balloon when the operating force is released. In addition, the auxiliary tool does not have a function of guiding the distal end portion of the endoscope, and the operator inserts the distal end portion of the endoscope into the balloon so that it is accurately aligned with the opening of the balloon end portion. It is necessary to do this, and the work becomes troublesome.

  The auxiliary tool disclosed in Patent Document 2 is a paper-made auxiliary tool that is used to separate the endoscope from the distal end when the distal end of the endoscope is inserted into the cylindrical portion of the balloon and then removed from the tubular portion. It is necessary to cut or tear it off with your finger. Further, it is necessary to increase the rigidity of the auxiliary tool in order to prevent it from being crushed against the balloon restoring force when it is inflated into a cylindrical shape prior to the introduction of the distal end portion of the endoscope.

  The auxiliary tool disclosed in Patent Document 3 performs axial positioning of the distal end portion of the endoscope in the hood, and does not improve the introduction of the distal end portion of the endoscope into the hood.

  The purpose of the present invention is to eliminate the elastic force of expanding the hood end part larger than the tip part before inserting the tip part of the endoscope into the hood, and the rigidity to prevent crushing. In this case, an endoscope hood mounting aid that can be easily detached from the endoscope on the inner surface side is provided.

  An endoscope hood mounting aid according to a first aspect of the present invention is an insertion portion that is inserted into a cylindrical hood and guides the distal end portion of the endoscope in the distal direction toward the inner surface to introduce the endoscope into the cylindrical hood. A guide portion that is connected to the proximal end side of the insertion portion and guides the distal end portion of the endoscope toward the insertion portion on the inner surface side; and a pulling portion that is coupled to the proximal end side of the guide portion. The insertion portion and the guide portion include a separation portion that elastically opens in a circumferential direction and allows the distal end portion of the endoscope on the inner surface side to pass to the outer surface side.

  According to the first invention, after inserting the insertion portion into the cylindrical hood, the distal end portion of the endoscope is guided from the guide portion to the insertion portion by pushing the distal end portion of the endoscope in the distal direction from the guide portion. The The insertion portion opens the separation portion in the circumferential direction and expands elastically in the radial direction as the distal end portion of the endoscope enters, whereby the hood increases in diameter and the distal end portion of the endoscope is Accepted on the inner surface side and put into a mounted state.

  After attaching the hood to the distal end of the endoscope, pull the pulling part to pull out the endoscope hood mounting aid from the hood. When pulling out, the insertion part and the guide part are sideways at the separating part. Open and pass through the distal end of the endoscope and separate from the distal end.

  According to the first invention, the endoscope hood mounting aid itself can omit a large restoring force and rigidity. In addition, after attaching the cylindrical hood to the endoscope, the endoscope hood can be removed from the cylindrical hood by pulling out the endoscope hood attachment aid without damaging the endoscope hood attachment aid. It can be detached from the mirror hood mounting aid.

  The endoscope hood mounting aid of the second invention is the endoscope hood mounting aid of the first invention, wherein a plurality of protrusions extending in the axial direction are formed on the inner surfaces of the insertion portion and the guide portion. It is characterized by being.

  According to the second invention, the protrusions on the inner surfaces of the guide portion and the insertion portion reduce the sliding resistance of the axial relative movement between the inner surfaces of the guide portion and the insertion portion and the distal end portion of the endoscope. As a result, when pushing the distal end portion of the endoscope into the cylindrical hood and when pulling out the endoscope hood mounting aid from the tubular hood, the inner surface of the guide portion and the insertion portion and the distal end portion of the endoscope Relative movement is smooth.

  The endoscope hood mounting aid of the third invention is the endoscope hood mounting aid of the first or second invention, wherein a plurality of protrusions extending in the axial direction are formed on the outer surface of the insertion portion. It is characterized by.

  According to the third invention, the protrusion on the outer surface of the insertion portion reduces the sliding resistance of the axial relative movement between the outer surface of the insertion portion and the inner surface of the cylindrical hood. As a result, the insertion of the insertion portion into the cylindrical hood becomes smooth.

  In the endoscope hood mounting aid of the fourth invention, in the endoscope hood mounting aid of any of the first to third inventions, the pulling portion is a ring into which a finger can be inserted. Features.

  According to the fourth invention, the operator can efficiently pull out the endoscope hood mounting aid from the cylindrical hood by putting a finger in the ring and pulling the endoscope hood mounting aid. it can.

  In the endoscope hood mounting aid according to the fifth aspect of the present invention, in the endoscope hood mounting assist tool according to the fourth aspect of the present invention, at least one of the distal end portions of the endoscope is located at a portion facing the guide portion. It has the recessed part of the depth which can accommodate a part, It is characterized by the above-mentioned.

  According to the fifth aspect of the invention, the endoscope enters the inner surface side of the guide portion via the concave portion of the ring, so that the bending of the endoscope is reduced, and the endoscope enters the guide portion smoothly.

  In the endoscope hood mounting aid according to the sixth aspect of the present invention, in the endoscope hood mounting aid according to any one of the first to fifth aspects of the invention, the insertion portion is disposed separately in the circumferential direction and has a distal end. It is comprised from the several nail | claw part which protrudes in the direction, It is characterized by the above-mentioned.

  According to the sixth invention, since the tip of the claw portion is thin, the insertion of the insertion portion into the cylindrical hood becomes efficient. Moreover, a some nail | claw part can be pressed from the radial direction outer side, a tip part can be crushed, and it can insert in a cylindrical hood.

  In the endoscope hood mounting aid according to the seventh aspect of the present invention, in the endoscope hood mounting aid according to any one of the first to sixth aspects of the invention, the guide portion opens laterally and the endoscope is opened. The side opening portion for receiving the tip portion of the guide portion toward the inner surface side is provided at the base end side, and the opposing guide surface of the side opening portion is gradually approaching from the base end side of the guide portion toward the tip end side. Features.

  According to the seventh invention, since the distal end portion of the endoscope is inserted from the side opening portion of the endoscope hood mounting aid to the inner surface side of the guide portion, the pull portion on the guide portion proximal end side In spite of this, the distal end portion of the endoscope can be inserted into the guide portion without any trouble. Further, the distal end portion of the endoscope smoothly advances toward the insertion portion by the opposing guide surface of the side opening portion.

The perspective view which looked at the auxiliary tool from diagonally upward. The front view of an auxiliary tool. The rear view of an auxiliary tool. The bottom view of an auxiliary tool. The longitudinal cross-sectional view when seeing an auxiliary tool from the bottom side. The left view of an auxiliary tool. Explanatory drawing about the usage method of an auxiliary tool. The cross-sectional view which shows the modification of the part of the cylindrical part of a guide part. The perspective view of another auxiliary tool.

  1 to 6, the auxiliary tool 10 includes an insertion portion 11, a guide portion 12, and a ring 13 in order from the distal end side to the proximal end side. The insertion portion 11 and the guide portion 12 are, for example, a colorless and transparent polyethylene-like thin plate member, and are integrally molded products. The polyethylene material is slippery, and this slip exhibits a sufficient effect when the assisting tool 10 described later with reference to FIG. 7 is used. In order to further improve the sliding, fine irregularities may be provided on the material surfaces of the insertion portion 11 and the guide portion 12.

  The axial range including the insertion portion 11 and the distal end portion of the guide portion 12 constitutes the cylindrical portion 14. The cylindrical portion 14 has a uniform thickness, outer diameter, and inner diameter at any position in the axial direction, and is elastically compressible in the radial direction at any circumferential position. The proximal end side portion of the guide portion 12 is an open portion 15, and the open portion 15 opens the inner surface side of the guide portion 12 sideways, that is, in a direction perpendicular to the axial direction.

  The insertion portion 11 includes a plurality (five in this example) of claw portions 20. The plurality of claw portions 20 are arranged at equal angular intervals in the circumferential direction except for a circumferential portion of the separation portion 16 described later, and have a shape protruding at an acute angle toward the distal end direction of the auxiliary tool 10. The plurality of claw portions 20 are adjacent to each other in the circumferential direction at the proximal end portion, and are connected to each other in the circumferential direction, except for two having a separation portion 16 described later on the distal end side. Away in the direction.

  The separation part 16 extends linearly over the entire axial length of the cylindrical part 14. The separation part 16 extends between the claw parts 20 in the range of the insertion part 11. The cylindrical portion 14 is elastically openable in the circumferential direction of the cylindrical portion 14 at a circumferential position of the separating portion 16. In the free state of the cylindrical portion 14, the separating portion 16 is substantially closed in the circumferential direction by an elastic restoring force. The open part 15 has an isosceles triangle shape with the proximal end of the separating part 16 as the apex of the apex angle in front view of the auxiliary tool 10. When the cylindrical portion 14 opens in the circumferential direction at the separation portion 16, the inside of the cylindrical portion 14 is opened to the same side as the opening portion 15.

  The ring 13 is made of a rigid resin material that is separate from the insertion portion 11 and the guide portion 12, and has a dimension that allows the operator's index finger to be inserted into the inner peripheral side. The ring 13 is coupled to the base end portion of the guide portion 12 in such a direction that both ends of the center hole are opened to the same and opposite side sides as the open portion 15.

  A method of using the auxiliary tool 10 when the hood 25 is attached to the distal end portion of the endoscope 29 will be described with reference to FIG. The mounting operation proceeds in the order of FIGS. 7A, 7B, and 7C. Moreover, the surgeon who uses the auxiliary tool 10 assumes right-handedness.

  The endoscope 29 is for nasal use and has a diameter of about 5.9 mm, which is thinner than a general diameter of about 10 mm for oral use. In contrast, the hood 25 is made of a silicone material having a hardness of, for example, 40 degrees or more. This is because if the hardness is softer than 40 degrees, the effect of lifting the mucous membrane becomes insufficient. However, the hood 25 has a wall thickness of 0.5 to 0.6 mm even if its hardness is 40 degrees or more, and is therefore quite soft as a whole. Further, the hood 25 has sufficient elasticity in the radial direction in order to secure a mounting force to the distal end portion of the endoscope 29. The hood 25 may have a distal end fixed to the inner peripheral side of the water supply tube and the drainage tube, and when the hood 25 with such a water supply tube and the drainage tube is attached to the endoscope 29, The auxiliary tool 10 is applicable.

  As shown in FIG. 7A, the insertion portion 11 is inserted into the hood 25. In order to smoothly insert the distal end of the insertion portion 11 into the hood 25, (a) the outer diameter of the distal end of the insertion portion 11 is set to be appropriately smaller than the inner diameter of the proximal end of the hood 25, or (b ) The surgeon elastically deforms the tip portions of the plurality of claws 20 so as to be slightly crushed from the outside in the radial direction, crushes the tips, and then inserts them into the hood 25, or (c) the plurality of insertion portions 11 In a free state, the distal ends thereof are formed from the beginning so that the distal ends thereof are directed toward the radial center, that is, the plurality of insertion portions 11 are entirely swept in the distal end direction.

   A lubricant is applied to the distal end portion of the endoscope 29 in advance so that the endoscope 29 can easily move in the auxiliary tool 10 and the hood 25. Then, the tip portion is inserted into the open portion 15 obliquely from the ring 13. The operator pushes the distal end portion of the endoscope 29 into the cylindrical portion 14 while preventing the insertion portion 11 from coming off from the hood 25 by grasping the hood 25 from the outer peripheral side with the left hand. Since the opening portion 15 has an isosceles triangle shape with the apex angle of the cylindrical portion 14 in the front view of the assisting tool 10, the distal end portion of the endoscope 29 is open portions on both sides in the direction perpendicular to the pushing direction. While being in contact with the inner surface of 15, it is pushed toward the proximal end of the cylindrical portion 14.

  As shown in FIG. 7 (b), the distal end portion of the endoscope 29 is expanded on the both sides in the direction perpendicular to the pushing direction while widening the separation width of the separating portion 16 when pushed in the range of the cylindrical portion 14. It is guided by the inner surfaces of the guide portion 12 and the insertion portion 11 and is inserted into the hood 25. The surgeon stops pushing when the distal end portion of the endoscope 29 reaches a predetermined position in the hood 25. At the predetermined position, the distal end of the endoscope 29 extends beyond the distal end of the insertion portion 11 in the hood 25 and reaches the distal end side from the distal end of the insertion portion 11.

  The operator holds the part of the hood 25 where the distal end of the distal end portion of the endoscope 29 is positioned with the left hand, inserts the index finger of the right hand into the circular hole of the ring 13, and pulls out the auxiliary tool 10 from the hood 25. Pull the assisting tool 10 with the index finger. The surgeon's hand is usually wet with a lubricant or the like and is easily slippery. However, by inserting a finger into the ring 13, the assisting tool can be reliably pulled out.

  Thus, the tip of the auxiliary tool 10 comes out of the hood 25 as shown in FIG. In addition, the extraction of the auxiliary tool 10 from the hood 25 is directed obliquely downward away from the endoscope 29 with respect to the endoscope 29. Accordingly, the separation width in the separation unit 16 gradually increases. To go. When the separation width of the separation portion 16 becomes equal to or larger than the outer diameter of the endoscope 29, the endoscope 29 goes out of the cylindrical portion 14 in the radial direction via the separation portion 16, and the auxiliary tool 10 is removed from the endoscope 29. This completes the operation of attaching the hood 25 to the distal end portion of the endoscope 29. The hood 25 is brought into close contact with the distal end portion of the endoscope 29 by the elastic force in the direction of reducing the diameter.

  FIG. 8 shows a modification of the cylindrical portion 14 of the guide portion 12. In this modification, a plurality of protrusions 34 and 35 are formed on the inner surface side and the outer surface side of the cylindrical portion 14 at equal angular intervals in the circumferential direction, respectively, and extend in the axial direction. FIG. 8 is a cross-sectional view of the guide portion 12, but the protrusions 34 and 35 are also formed on the inner surface and the outer surface side of the claw portion 20. The circumferential angle interval of the protrusions 34 on the inner surface side is smaller than the circumferential angle interval of the protrusions 35 on the outer surface side. That is, the number of the protrusions 34 on the inner surface side is larger than the number of the protrusions 35 on the outer surface side. Further, the protrusion 35 may be omitted in the guide portion 12 portion.

  The protrusion 34 has an effect of reducing sliding resistance between the inner surfaces of the insertion portion 11 and the guide portion 12 and the distal end portion of the endoscope 29, and the protrusion 35 is formed on the outer surface of the insertion portion 11 and the inner surface of the hood 25. Has the effect of reducing the sliding resistance. In FIG. 8, the protrusions 34 and 35 have a triangular cross section, but may have other cross sectional shapes, for example, an isosceles trapezoidal shape in which the radially inner side is shorter than the radially outer side.

  FIG. 9 is a perspective view of another auxiliary tool 40. Of the elements of the auxiliary tool 40, the same elements as those of the auxiliary tool 10 are designated by the same reference numerals as those assigned to the elements of the auxiliary tool 10, description thereof is omitted, and only the differences will be described.

  The recess 41 is formed in a portion of the ring 13 that faces the opening 15 and has a depth that substantially matches the deepest portion of the inner surface of the opening 15. The concave portion 41 is configured such that when the distal end portion of the endoscope 29 is inserted into the opening portion 15, the distal end portion is partially or almost entirely fitted. Thereby, the distal end portion of the endoscope 29 does not need to be bent so much and the pushing toward the cylindrical portion 14 becomes smooth.

  Note that the present invention is not limited to the above-described embodiment, and various modifications can be made without departing from the scope of the present invention. For example, in the above-described embodiment, the ring 13 as the pulling portion is made of a separate material from the insertion portion 11 and the guide portion 12, but the thickness is reduced so that the insertion portion 11 and the guide portion 12 It can also be an integrated product.

DESCRIPTION OF SYMBOLS 10 ... Auxiliary tool, 11 ... Insertion part, 12 ... Guide part, 13 ... Ring (pull part), 14 ... Cylindrical part, 15 ... Opening part, 16 ... Separation part, 20 ... Claw part, 25 ... Hood, 34 ... Projection Ridges, 35 ... ridges, 40 ... auxiliary tools, 41 ... concave portions.

Claims (7)

An insertion portion that is inserted into the cylindrical hood and guides the distal end portion of the endoscope toward the distal end on the inner surface side and introduces it into the cylindrical hood;
A guide portion that is connected to the proximal end side of the insertion portion and guides the distal end portion of the endoscope toward the insertion portion on the inner surface side;
A pulling portion coupled to the proximal end side of the guide portion;
With
The insertion portion and the guide portion have a separation portion that elastically opens in the circumferential direction and allows the distal end portion of the endoscope on the inner surface side to pass to the outer surface side. Ingredients. The endoscope hood mounting aid according to claim 1,
An endoscope hood mounting aid, wherein a plurality of protrusions extending in the axial direction are formed on the inner surfaces of the insertion portion and the guide portion. The endoscope hood mounting aid according to claim 1 or 2,
An endoscope hood mounting aid, wherein a plurality of protrusions extending in the axial direction are formed on an outer surface of the insertion portion. The endoscopic hood mounting aid according to any one of claims 1 to 3,
The pulling portion is a ring into which a finger can be inserted. The endoscope hood mounting aid according to claim 4,
The ring has a recess having a depth capable of accommodating at least a part of the distal end portion of the endoscope at a portion facing the guide portion. In the endoscope hood mounting aid according to any one of claims 1 to 5,
The insertion hood for an endoscope, wherein the insertion portion is composed of a plurality of claw portions arranged separately in the circumferential direction and protruding in the distal direction. The endoscopic hood mounting aid according to any one of claims 1 to 6,
The guide portion has a side opening portion on the proximal end side that opens to the side and receives the distal end portion of the endoscope on the inner surface side,
An endoscopic hood mounting aid, wherein the opposing guide surface of the side opening portion gradually approaches from the proximal end side to the distal end side of the guide portion.

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