JP2627546B2 - Endoscope measuring tool - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Application Field] The present invention is directed to a forceps channel of an endoscope,
The present invention relates to a length measuring instrument for an endoscope used as a physical difference for measuring a size of an affected part in a body cavity or the like.

[Prior Art] In this type of endoscope measuring instrument of this type, a scale member provided with a scale was bent and extended in an L-shape in old times. However, in this type, since the scale member extends in one direction, there is a disadvantage that the scale member cannot be used unless the scale member is protruded in a direction easy to observe in the visual field. Moreover, it was extremely difficult to adjust the protruding direction in practice.

Therefore, conventionally, as shown in, for example, Japanese Utility Model Publication No. Sho 62-23441, a pair of opening members that expand bidirectionally by elastic force are provided so as to be able to enter and exit the flexible tube, and graduations at predetermined intervals are provided between the opening members. The graduation member which had was attached.

However, in such a length measuring instrument for an endoscope, since the direction (inclination) in which the scale member is developed is determined, as shown in FIG. When approaching from an oblique direction, there is a disadvantage that the dimensions of the affected part 62 cannot be measured accurately.

In addition, the opening member itself must have a strong structure that is firmly opened in both directions. At the time of length measurement, the open member closed in the flexible tube must be remotely pushed out against its own elastic force. There were difficult disadvantages. Also, because it is necessary to have a solid structure throughout, manufacturing costs are incurred,
It was very expensive to use as a difference.

Therefore, the inventor provided a first cut in the radial direction at an interval from the distal end of a tube that can be inserted into and removed from the forceps channel of the endoscope, and formed a tube at that portion so that the tube could be bent and stretched. A scale is attached to a portion on the distal end side from the first cut to form a length measuring portion, and a distance shorter than the length of the length measuring portion is provided on the base side from the first cut, in the radial direction. And a second cut is formed at the portion so that the tube can be bent and stretched freely, and a flexible and small-diameter pulling wire is inserted into the distal end portion of the operating core wire that is inserted into the tube so as to be able to advance and retreat from the base end side of the tube. While locking the base end of
The pulling wire was drawn out of the tube from the second cut, and a length measuring instrument for an endoscope in which the tip of the pulling wire was locked to the length measuring portion was invented. 63-19
9193).

When the length measuring instrument for an endoscope is inserted into the forceps channel of the endoscope, the tube is straightened over the entire length, and the distal end of the operating core wire is inserted between the distal end of the tube and the first cut. Keep your whole hips strong. Then, at the time of length measurement, the operation core wire is pulled toward the base side to invert the tube by 180 degrees at the first cut, and in this state, the tube is pressed against the target affected part or the like. Then, the tube is bent at the second cut, so that the length measuring section comes into close contact with the affected part, so that the dimension of the affected part can be measured.

[Problems to be Solved by the Invention] The above-described conventional measuring instrument for an endoscope has no means for regulating the advance / retreat of the operating core wire at an intermediate position. for that reason,
When the measuring core is pulled out from the forceps channel after use, the operating core is pushed into the distal end side to relax the pulling wire, and as shown in FIG.
89 protrudes out of the tube 81 from the second cut 86. Therefore, when the measuring instrument is pulled in the direction of the arrow to remove it from the forceps channel 90, the measuring instrument is
Not only can it be caught in the opening of 90 and can not be removed,
There are drawbacks such as the length measuring tool being damaged and the fragments may damage the body cavity of the patient.

An object of the present invention is to solve such a conventional drawback and to provide a highly safe length measuring instrument for an endoscope that guarantees that it can be reliably removed from a forceps channel.

[Means for Solving the Problems] In order to achieve the above object, a length measuring instrument for an endoscope according to the present invention includes a tube which can be inserted into and detached from a forceps channel of an endoscope, and which is spaced from a distal end thereof. A first cut is provided in the radial direction, and the tube is formed so as to be able to bend and stretch freely at that portion, and a scale is attached to a portion on the tip side from the first cut to form that portion in the length measuring section, A second cut is provided in the radial direction on the base side from the first cut at an interval shorter than the length of the length measuring section, and the tube is formed so as to be able to bend and stretch freely at that portion. A flexible and small-diameter traction wire is locked at the base end portion of the operation core wire which is inserted into the tube so as to be able to advance and retreat from the side, and the traction wire is taken out of the tube from the second cut. , For endoscopes where the tip of the pulling wire is locked to the length measuring section In the length measuring tool, the distal end of the operating core is formed so as to be inserted between the distal end of the tube and the first cut, and the distal end of the operating core is connected to the second cut. A core wire stopping means for stopping at a position near the base is provided.

[Operation] When the length measuring tool is inserted into the forceps channel of the endoscope,
The distal end of the operating core wire is inserted between the distal end of the tube and the first cut. Then, since the operation core wire passes through the first and second cuts, the tube is strong and can be easily inserted into the forceps channel without being bent at each cut.

When the measuring instrument is removed from the forceps channel of the endoscope after the measurement, the end of the core wire is stopped at a position near the base near the second cut by the core wire stopping means. The maneuvering core then did not reach each cut, and the puller wire slack long enough for the tube to straighten at each cut, so pulling the tube out of the forceps channel would only require The portion of the tube tip bent at the first and second cuts comes out while returning to the straight state naturally along the forceps channel.

Example An example will be described with reference to the drawings.

FIG. 1 shows a length measuring tool for an endoscope according to a first embodiment of the present invention, wherein 1 is a flexible tube made of, for example, tetrafluoroethylene resin, for example, having an outer diameter of 1.5 to 2.5 mm. , Wall thickness 0.
Those having a size of about 2 to 0.5 mm are used. Tube tip
At a position at a distance L from 1a, a first cut 2 is cut in the tube 1 in the radial direction by a razor blade or the like. The distance L is, for example, about 10 to 50 mm,
The length may be set according to the purpose of use.

The tube 1 is cut at the first cut 2 with a slight connection margin 2a, and can be bent and stretched freely like a joint at this portion.

In the portion of the tube 1 on the tip side from the first cut 2,
A scale 4 is provided, and this portion is formed in a length measuring section 5 for measuring a dimension of an affected part or the like. The scale 4 is, for example, a circumferential line painted on the outer periphery of the tube 1 and is attached so as to divide the length measuring section 5 into, for example, three equal parts. Of course, the graduations 4 can be provided at a narrow interval or a wide interval depending on the purpose of use, and graduations of different colors may be provided.

A second cut 6 is cut in the radial direction of the tube 1 at a position closer to the base side than the first cut 2 and at a distance M from the first cut 2, and the tube 1 is also formed to be able to bend and stretch freely at this portion. Have been. The distance M may be shorter than the length of the length measuring unit 5, and is most preferably about half of L.
Further, in this embodiment, the second cut 6 is cut from the direction opposite to the first cut 2 by 180 degrees at an interval.

The outer peripheral corners of the tube tip 1a and the first and second cuts 2, 6 are formed into smooth and rounded chamfers 1t, 2t, 6t.
Is formed.

An operation core wire 7 having substantially the same length as the tube 1 is inserted into the tube 1 so as to be able to advance and retreat from the base end 1b side of the tube. A stainless steel wire, a coil, or the like can be used for the operation core wire 7, but the diameter is 0.2 to 1 mm.
If a single fiber of the optical fiber is used, it has appropriate flexibility and stiffness, and is hard to bend. In this embodiment, a single fiber of an optical fiber coated with a synthetic resin tube having a thickness of about 0.1 mm is used.

An operation rod 15 is connected to the base end of the operation core wire 7. The rod 15 protrudes from the tube 1 on the base side, and an operating knob 8 is attached to a protruding end of the rod 15.

A guide pin 16 protrudes from the rod 15.
Further, a guide groove 18 is formed along the axial direction in a guide tube 17 which is communicated and attached to the base end 1b of the tube.
The guide groove 18 is formed to be bent in a crank shape near the base end. 18a is the crank part.

The guide groove 18 is open at the base end of the guide tube 17, from which the guide pin 16 can enter the guide groove 18 and slide along the guide groove 18. Then, when the guide pin 16 is inserted into the innermost part of the guide groove 18, as shown in FIG. 2, the tip of the operating core wire 7 is positioned at the position between the tip 1 a of the tube and the first cut 2. Inserted until On the other hand, when the operation core wire 7 is pulled to the nearest side (right side in the figure) so that the guide pin 16 is pulled out to the outside, as shown in FIG. The stopper 9 made of a metal pipe is pulled out to a position where it comes into contact with a constriction 13 formed in the tube 1. These are both ends of the movement range of the operating core wire 7.

Then, the rod 15 is pulled out of the guide tube 17 from the pulled-out state.
6, the guide pin 16 comes into contact with the base end face of the guide tube 17 or stops at a position where it hits the crank portion 18a of the guide groove 18, as shown in FIG. The distal end of the core wire 7 comes near the base end near the second cut 6. That is, the tip of the operating core wire 7 is connected to the second cut 6
The guide wire 16 and the guide groove 18 constitute a core wire stopping means for stopping at a position near the base end in the vicinity of. In this state, the pulling wire 10 is drawn out of the tube 1 by a length sufficient for the tube 1 to extend straight at each of the cuts 2 and 6.

Returning to FIG. 1, the stopper 9 is fixed to the distal end side of the operating core wire 7 by bonding or caulking. For example, one end of a pulling wire 10 made of a flexible and small-diameter weft thread (hanging thread) having a diameter of about 0.03 to 0.2 mm is tied to the operating core wire 7 on the hand side (base side) of the stopper 9. . Therefore, when the operation core wire 7 is pulled to the proximal end side, the knot 10a of the pulling wire 10 is hooked on the stopper 9, and the pulling wire 10 is pulled in the same direction.

The puller wire 10 extends out of the tube 1 through the second cut 6. The distal end of the pulling wire 10 is connected to a retaining ring 12 in the length measuring section 5 through a through hole 11 formed near the center of the length measuring section 5 at the distal end of the tube. Therefore, when the operating knob 8 is pulled on the base side,
The pull wire 10 is pulled through the operating core wire 7, and the length measuring section 5 of the tube is pulled toward the second cut 6 by the pull wire 10, and the first cut 2 and the second cut 6 are gradually formed. Bend. And the length measuring unit 5 is just 18
When the tube 9 is bent so as to be inverted by 0 degrees, the rear end of the stopper 9 hits a constricted portion 13 formed in the tube 1. Then, the operation core wire 7 cannot be further pulled.

2 to 4 show the length measuring tool for an endoscope according to the above-described embodiment according to the operation procedure. In these drawings, the wall of the tube 1 is schematically indicated by a line.

First, as shown in FIG.
The guide pin 16 is inserted to the innermost part of the guide groove 18 so that the tip of the guide groove 16 is inserted to a position between the tip 1a of the tube and the first cut 2. In this state, the first and second cuts 2,6
Since the operating core wire 7 has passed through the tube 1, the tube 1 has a strong waist and does not bend at the cuts 2 and 6. Therefore, in this state, the length measuring tool can be easily inserted into the forceps channel 30 of the endoscope. In this case, the tip of the tube
1a and the outer peripheral corners of the first and second cuts 2, 6 are:
Since all the chamfers 1t, 2t, 6t are formed, these portions are smoothly inserted into and removed from the forceps channel 30, and are not caught by members on the endoscope side.

When the distal end of the measuring instrument for an endoscope is protruded from the distal end portion 31 of the endoscope, the operation knob 8 on the hand side is fully pulled to a position where the stopper 9 contacts the constricted portion 13. Then, as shown in FIG. 3, the first cut 2 is bent by 180 degrees, and the length measuring unit 5 turns backward by 180 degrees.

Next, when the distal end of the tube (in this case, the first cut 2) is pressed against the target affected part 32 from the state shown in FIG. 3, the tube is brought into the second cut 6 as shown in FIG.
And the tip of the tube becomes T-shaped. Therefore, the length measuring unit 5 is always observed at the center of the field of view of the endoscope, and the scale 4 allows the size of the affected part to be read. When the length measuring tool is pressed against the affected part 32 or the like in this manner, the corners on the outer periphery of the distal end 1a of the tube and the first and second cuts 2, 6 are all formed into smooth chamfers 1t, 2t, 6t. It does not hurt the mucosal surface.

Further, when the tube 1 approaches the affected part from an oblique direction, as shown by a two-dot chain line in FIG. The second cut 6 is bent so that the second cut 6 adheres along the affected part. Therefore, even when the tube is approaching the affected part from the direction in which the tube is inclined, the length measuring unit 5 can be brought into close contact with the affected part and the length can be easily measured at the center of the visual field.

FIG. 5 shows a use state of the second embodiment in which the first cut 22 and the second cut 26 are cut in directions different from each other by 90 degrees. In this case, since the length measuring portion 5 is bent in parallel to the side portion of the tube 1, the scale can be easily recognized.

In actual use, even if the tube 1 is formed by cutting the first cut 2 and the second cut 6 from directions different from each other by 180 degrees as in the above-described first embodiment, Since the second cut 6 is twisted by slightly pressing the affected part slightly, the length measuring part 5 is aligned with the side of the tube, which is the same state as in FIG. Therefore, the direction of the first and second cuts may be formed in substantially any direction, and preferably, the directions of the first and second cuts may be different.

FIG. 6 shows a state where the length measuring instrument for an endoscope of the present invention is removed from the forceps channel of the endoscope. At this time, when the rod 15 is pushed in the direction of the guide pipe 17, the guide pin 16
6 comes into contact with the base end surface of the guide tube 17 as shown in FIG. 6, or stops at a position where the guide tube 17 hits the crank portion 18a of the guide groove 18. At this time, the distal end of the operating core wire 7 is located at a position near the base end near the second cut 6, and the pulling wire 10 is connected to the tube 1 by a length sufficient to make the distal end portion of the tube 1 straight. It is pushed out.

Therefore, in this state, simply pulling out the tube 1 from the forceps channel causes the bent portion of the tube tip to come off while returning to a straight state naturally along the forceps channel without being caught by the member on the endoscope side. .

[Effects of the Invention] According to the length measuring instrument for an endoscope of the present invention, even when approaching a target affected part or the like from an oblique direction,
In addition to having an excellent effect of easily measuring the dimension at the center of the field of view, the length measuring section can be easily attached to the target site,
When removing the length measuring tool from the forceps channel, the distal end of the operating core wire can be stopped at a portion near the base end side near the second cut, so that the tube can be naturally straightened along the forceps channel. Can be removed reliably,
It has an excellent effect of preventing damage to the measuring tool and accidents such as personal injury.

[Brief description of the drawings]

FIG. 1 is a perspective view showing a part of the first embodiment of the present invention cut away, FIGS. 2 to 4 are partial side views showing a use state of the embodiment, and FIG. FIG. 6 is a partial perspective view of the second embodiment, FIG. 6 is a side view showing a state in which a length measuring tool is removed from a forceps channel of an endoscope, and FIG. 7 is a state of use of a conventional length measuring instrument for an endoscope. FIG. 8 is a schematic side view showing a use state of an endoscope measuring instrument for which the inventor has previously applied for a patent. 1 ... tube, 1t ... chamfered part, 2,22 ... first cut, 2t ... chamfered part, 4 ... scale, 5 ... length measuring part, 6,26
... Second cut, 6t... Chamfer, 7... Operating core wire, 9... Stopper, 10... Pulling wire, 15... Rod, 16... Guide pin, 17. … Guide groove, 18
a …… the crank part.

Claims (1)

(57) [Claims] 1. A tube which can be inserted into and removed from a forceps channel of an endoscope is provided with a first cut in a radial direction at an interval from a distal end thereof, and the tube is formed so as to be capable of bending and stretching at that portion. A scale is attached to a portion on the tip side from the first cut to form a length measuring portion, and a distance shorter than the length of the length measuring portion is provided on the base side from the first cut in the radial direction. And a second cut is formed at the portion so that the tube can be bent and stretched, and a flexible and small-diameter pulling wire is connected to the distal end portion of the operating core wire which is inserted into the tube so as to be able to advance and retreat from the base end side of the tube. And the pulling wire is pulled out of the tube from the second cut,
In an endoscope measuring tool in which a tip of a pulling wire is locked to the length measuring section, a tip of the operating core wire is connected to a tip of the tube and the first end.
And a core wire stopping means for stopping the distal end of the operating core wire at a position near the base near the second cut line. Measuring instrument for endoscope.