JP4388195B2 - Endoscope measuring tool - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to an endoscope measuring instrument that is inserted into a treatment instrument insertion channel of an endoscope and measures the size of an affected part in a body cavity.
[0002]
[Prior art]
Various types of endoscope measuring instruments have been proposed in the past, but it is easy to measure the size of the affected part of the body cavity without reinserting it into the treatment instrument insertion channel of the endoscope. There is a length measuring instrument described in Japanese Patent Application Laid-Open No. 11-192201 as an endoscope measuring tool that can be used.
[0003]
The measuring instrument is formed by forming a plurality of longitudinal cuts of the same length parallel to the axial direction of the flexible tube in the vicinity of the distal end of the flexible tube, and forming strips between the cuts. The strip folds are formed at both ends of the strip pieces, and the mountain fold folds are formed at the intermediate portion of each strip piece.
[0004]
The strip is bent at each fold line by pulling the operation core wire that is locked to the distal end of the flexible tube and inserted into the flexible tube so as to be movable forward and backward in the axial direction. The tube protrudes outward, and the surface facing the proximal side of the protruding portion is a length measuring portion.
[0005]
[Problems to be solved by the invention]
In the conventional endoscope measuring instrument described above, for example, as shown in FIG. 7, each strip 91 protrudes in a direction perpendicular to the axis of the flexible tube 92. Therefore, the strip 91 is lifted from the affected part 100 by at least the length of the distal end part 92 a of the flexible tube 92.
[0006]
Therefore, when the state projected from the treatment instrument insertion channel 96 of the endoscope 95 is viewed from the observation window 97, parallax occurs between the scale attached to the strip 91 and the affected part 100 on the measurement side. An error occurs in the dimension measurement of the affected part 100.
[0007]
SUMMARY OF THE INVENTION An object of the present invention is to provide an endoscope measuring instrument that can perform accurate dimension measurement without the influence of parallax by bringing a length measuring section into close contact with an affected area.
[0008]
[Means for Solving the Problems]
In order to achieve the above-mentioned object, the measuring instrument for an endoscope of the present invention has a plurality of same lengths in the vicinity of the distal end of the flexible tube constituting the sheath in parallel with the axial direction of the flexible tube. Vertical strips are formed, strips are formed between the slits, valley folds are formed at both ends of each strip, and mountain folds are formed at the middle of each strip. An operation core wire is inserted into the flexible tube so as to be movable back and forth in the axial direction, the tip is locked to the tip of the flexible tube, and the strip is bent at each fold by pulling the operation core wire from the hand side. In an endoscope measuring instrument that protrudes outward from the flexible tube, and the surface facing the proximal side of the protruding portion becomes a length measuring portion, the fold of the mountain fold is the fold of the two valley folds. It is formed at a position closer to the tip than the bisecting position between them. When it is pulled toward the side strips it is obtained by so as to project from the flexible tube forward from the vertical direction with respect to the axis of the flexible tube.
[0009]
In addition, when the operation core wire is pulled to the full side, it is preferable that the protruding end of the strip is located on the front side or the same surface from the most distal end of the sheath.
Further, a scale may be provided on the outer surface between the mountain fold fold of each strip piece and the valley fold on the near side, and the outer surface of the strip piece may be provided on the outer peripheral surface of the flexible tube. A scale may be provided continuously.
[0010]
DETAILED DESCRIPTION OF THE INVENTION
Embodiments of the present invention will be described with reference to the drawings.
FIG. 3 shows the endoscope measuring instrument in use, FIG. 1 is a cross-sectional view of the distal end portion thereof, and FIG. 2 is an external view of the distal end portion being straightened.
[0011]
In the figure, 1 is a flexible tube that constitutes a sheath that can be inserted into and removed from the treatment instrument insertion channel. For example, the outer diameter is 1.5 to 2.5 mm and the wall thickness is about 0.2 to 0.4 mm. A tube made of tetrafluoroethylene resin is used.
[0012]
As shown in FIG. 2, four longitudinal cuts 3 having the same length are formed in the vicinity of the distal end of the flexible tube 1 in parallel with the axial direction of the flexible tube 1, thereby A strip 4 is formed between each notch 3 and the notch 3. The four cuts 3 are formed in the wall portion of the flexible tube 1 at equal intervals of approximately 90 °.
[0013]
First and second valley folds 5 and 6 that can be bent outward are formed at both front and rear ends of each strip 4, and a mountain fold that can be bent inward is formed at an intermediate portion of each strip 4. The crease 7 is formed.
[0014]
Then, a mountain fold fold 7 and a second valley fold crease 6 are determined by the length of the portion (back side strip 4b) between the mountain fold crease 7 and the first valley fold crease 5 on the front end side. The length of the portion (front side strip 4a) between the two is longer. That is, A> B in FIG.
[0015]
In order to measure the size of the affected part, etc. on the outer surface of the portion (front side strip 4a) between each of the strips 4 between the mountain fold crease 7 and the second valley fold crease 6 on the near side. The scale 8 is attached, and that part is the length measuring section. Further, the same scales 9 and 10 as the scale 8 are continuously attached to the outer peripheral surface of the back side strip 4b and the flexible tube 1 from the front side strip 4a.
[0016]
A flexible operation core wire 11 is inserted into the flexible tube 1 so as to be movable back and forth in the axial direction. As shown in FIG. 1, the engagement tip 12 attached to the tip of the operation core wire 11 is locked to the tip cap 13 attached to the tip of the flexible tube 1, thereby the operation core wire. 11 is connected to the tip of the flexible tube 1.
[0017]
As shown in FIG. 3, a base 15 made of plastic or metal is connected and fixed to the base end of the flexible tube 1, and an operation knob 16 attached to the base end of the operation core wire 11 includes: It is detachably attached to the base 15.
[0018]
In a state where the operation knob 16 is engaged with the base 15, the operation core wire 11 is pushed into the back, and the strip 4 is straightly extended as shown in FIG. 2, and the operation knob 16 is removed from the base 15. When the operation core wire 11 is removed and pulled toward the hand side, the strip 4 is projected from the flexible tube 1 as shown in FIGS. 1 and 3.
[0019]
However, since the length A of the front side strip 4a is longer than the length B of the back side strip 4b as described above, when the operation core wire 11 is pulled toward the hand side, as shown in FIG. The strip 4 protrudes from the flexible tube 1 in a state of warping forward from the vertical direction with respect to the axis of the flexible tube 1.
[0020]
In the present invention, when the operation core wire 11 is pulled all the way to the hand side, the protruding end of the strip 4 is the leading edge of the sheath (that is, the engaging tip 12 protruding from the tip of the flexible tube 1). The lengths of the front side strip 4a and the back side strip 4b are set so as to be positioned on the front side or the same surface from the protruding end).
[0021]
Next, the use of the endoscope measuring instrument of the above embodiment will be described.
When inserting the length measuring instrument for endoscope of the present invention into the treatment instrument insertion channel of the endoscope, if the operation knob 16 is engaged with the base 15, the strip 4 is in a straight state, and the treatment instrument It can be easily inserted into the insertion channel.
[0022]
When measuring the affected part or the like, if the strip 4 protrudes from the tip of the endoscope, and the operation knob 16 is removed from the base 15 and pulled as it is, the strip 4 is formed as shown in FIG. It protrudes from the flexible tube 1 in a cross shape.
[0023]
FIG. 4 shows a state in which the strip 4 protruding from the treatment instrument insertion channel 51 of the endoscope 50 is pressed against the affected part 100 in the body, and the protruding end of the strip 4 is the sheath. Therefore, the protruding end of each strip 4 can be brought into close contact with the mucosal surface of the affected area 100 so as not to float up from the affected area 100.
[0024]
Accordingly, no parallax occurs between the scale 8 formed on the front strip 4a by observation from the observation window 52 of the endoscope 50 and the affected part 100 (or very small even if it occurs), and the scale 8 , The dimensions of the affected area 100 can be measured fairly accurately. If the protruding end of the strip 4 is positioned on the front side of the sheath, the same effect can be obtained even when the affected part 100 is on the slope.
[0025]
In addition, as shown in FIG. 5, the affected part 100 can be measured with the scale 10 attached to the outer peripheral surface of the flexible tube 1 by placing the flexible tube 1 along the affected part 100. As shown in FIG. 6, in the state where the strip 4 portion is straightened, the affected part 100 can be measured using the scale 9 attached to the back strip 4b.
[0026]
【The invention's effect】
According to the present invention, when the operating core wire is pulled toward the hand side, the strip piece that becomes the length measuring portion protrudes forward from the vertical direction with respect to the axis of the flexible tube. By accurately bringing the tip of the strip into close contact with the affected part, it is possible to perform accurate dimension measurement without the influence of parallax.
[Brief description of the drawings]
FIG. 1 is a side cross-sectional view of a distal end portion of a endoscope measuring instrument according to an embodiment of the present invention in use.
FIG. 2 is a side external view of the endoscope measuring instrument according to the embodiment of the present invention in a state in which a distal end portion thereof is straightened.
FIG. 3 is a perspective view of the endoscope measuring instrument in use according to an embodiment of the present invention.
FIG. 4 is a schematic view of the endoscope measuring instrument in use according to an embodiment of the present invention.
FIG. 5 is a schematic view of the endoscope measuring instrument in use according to an embodiment of the present invention.
FIG. 6 is a schematic diagram of a usage state of the endoscope measuring instrument according to the embodiment of the present invention.
FIG. 7 is a schematic view of a usage state of a conventional endoscope measuring instrument.
[Explanation of symbols]
1 Flexible tube (sheath)
3 Cut 4 Strip strip 4a Front strip strip 4b Back strip strip 5, 6 Valley fold 7 Mountain fold crease 8, 9, 10 Scale 11 Core wire for operation

Claims (4)

In the vicinity of the distal end of the flexible tube constituting the sheath, a plurality of vertically long cuts having the same length are formed in parallel to the axial direction of the flexible tube, and strips are formed between the cuts. A valley fold is formed at both ends of each strip piece, and a mountain fold crease is formed at an intermediate portion of each strip piece, and an operation core wire is freely moved in the axial direction in the flexible tube. Inserting and locking the tip of the flexible tube to the tip of the flexible tube, and pulling the operation core wire from the hand side, the strip is bent at each fold and protrudes outward of the flexible tube. In the measuring instrument for endoscopes, the surface facing the proximal side of the protruding portion is the length measuring section,
When the mountain fold fold is formed at a position closer to the tip than the bisected position between the two valley fold folds, and the operation core wire is pulled toward the hand side, the strip piece is An endoscopic measuring instrument characterized by projecting from the flexible tube toward the front from a direction perpendicular to the axis of the flexible tube. The measuring instrument for an endoscope according to claim 1, wherein when the operation core wire is pulled all the way to the hand side, the protruding end of the strip piece is located on the front side or the same surface from the most distal end of the sheath. The measuring instrument for an endoscope according to claim 1 or 2, wherein a scale is provided on an outer surface between a fold fold of each of the strips and a valley fold on the near side. The measuring instrument for an endoscope according to claim 3, wherein a scale is continuously provided on the outer peripheral surface of the flexible tube from the outer surface of the strip.

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