Urethral device

Abstract

To provide an indwelling urethral device capable of detachably and firmly connecting a connecting string to a tip.SOLUTION: An indwelling urethral device 1 comprises a thin rod-shaped indwelling urethral tip 10 to be placed in the urethra, and a connecting string 5 to be connected to the indwelling urethral tip 10. The connecting string 5 is a single thread having a large diameter part 6 formed in the middle thereof, and the indwelling urethral tip 10 includes a first connecting hole 23 and a second connecting hole 33 through which the connecting string 5 passes, the connecting holes 23 and 33 having hole entrances 23a and 33a smaller than the large diameter part 6 so as not to let the large diameter part 6 pass through. Both ends of the connecting string 5 are respectively passed through the first connecting hole 23 and the second connecting hole 33 from the hole entrances 23a and 33a and pulled out from respective hole exits 23b and 33b.SELECTED DRAWING: Figure 2

Description

[Technical Field]

[0001] The present invention relates to a urethral indwelling device to be placed in the urethra. [Background technology]

[0002] When urination disorders occur due to the closure or narrowing of the urethra caused by enlargement of the prostate gland or the like, a treatment is performed in which a urethral stent is placed in the urethra to widen the urethra.

[0003] Such urethral stents are disclosed, for example, in the following Patent Documents 1 to 3. However, the urethral stents disclosed in these documents have a complex structure and are intended to be placed in the urethra by a medical professional, making it difficult for users to place them themselves.

[0004] In response to this, urethral retention devices have been provided that have a simple structure and are connected to a stent or a tip by a connecting cord so that the user can easily place the device in the urethra and remove it from the urethra by themselves. These devices are disclosed in the following Patent Documents 4 to 6. [Prior art documents] [Patent documents]

[0005] [Patent Document 1] Japanese Patent Application Laid-Open No. 2003-52835 [Patent Document 2] Special Publication No. 2008-543499 [Patent Document 3] Patent No. 4025648 [Patent Document 4] Japanese Patent Application Publication No. 2019-63474 [Patent Document 5] Japanese Patent Application Publication No. 2019-63475 [Patent Document 6] Japanese Patent Publication No. 2020-736 Summary of the Invention [Problem to be solved by the invention]

[0006] When sterilizing the urethral retainer in an autoclave or replacing the connecting cord, it is necessary to remove the connecting cord from the stent or tip. However, in the urethral retainer devices disclosed in Patent Documents 4 to 6, the connecting cord is embedded and connected integrally with the resin stent or tip, and therefore once the connecting cord is attached to the stent or tip, it basically cannot be removed.

[0007] The present invention has been made in view of these problems, and has an object to provide a urethral indwelling device that allows a connecting string to be securely and detachably connected to a tip. [Means for solving the problem]

[0008] The urethral indwelling device of the present invention, which solves the above-mentioned problems, is a urethral indwelling device comprising a thin rod-shaped urethral indwelling tip to be placed in the urethra, and a connecting string connected to the urethral indwelling tip, wherein the connecting string is a single thread with an enlarged diameter portion formed midway, and the urethral indwelling tip has a first connecting hole and a second connecting hole which are connecting holes through which the connecting string passes, the first connecting hole and the second connecting hole having a hole entrance smaller than the enlarged diameter portion so as not to pass through the enlarged diameter portion, and both ends of the connecting string are passed through the hole entrances of the first connecting hole and the second connecting hole, respectively, and pulled out from the respective hole exits. By doing so, the connecting cords function as two pulling cords for pulling out the urethral indwelling tip from the urethra. It is characterized by: [Effects of the Invention]

[0009] According to the urethral indwelling device of the present invention, the connecting string can be securely and detachably connected to the urethral indwelling tip that is placed in the urethra, and the connecting string can be removed from the urethral indwelling tip as needed. [Brief explanation of the drawings]

[0010] [Figure 1] FIG. 1 is a perspective view of a urethral indwelling device according to a first embodiment of the present invention. [Figure 2] FIG. 2 is a perspective view of a prostate chip according to the first embodiment of the present invention. [Figure 3] FIG. 3 is an enlarged perspective view showing the structure of the thread connecting portion according to the first embodiment of the present invention. [Figure 4] FIG. 4 is a view for explaining the operation of connecting the prostate chip and the connecting cord according to the first embodiment of the present invention. [Figure 5] FIG. 5 shows the urethral indwelling device according to the first embodiment of the present invention in an indwelling state. [Figure 6] FIG. 6 is a perspective view of a urethral indwelling device according to a second embodiment of the present invention. [Figure 7] FIG. 7 is a perspective view of a prostate chip according to a second embodiment of the present invention. [Figure 8] FIG. 8 is an enlarged perspective view showing the structure of a thread connecting portion according to a second embodiment of the present invention. [Figure 9] FIG. 9 is a view for explaining the operation of connecting the prostate chip and the connecting cord according to the second embodiment of the present invention. DETAILED DESCRIPTION OF THE INVENTION

[0011] (First embodiment) A first embodiment of the present invention will be described below with reference to the drawings. In this embodiment, the urethral indwelling device will be described by taking as an example a case where the urethral indwelling device has a prostate chip that is placed in the prostate region inside the urethra, as shown in Figure 5.

[0012] The urethral indwelling device 1 comprises a prostate chip 10 and a connecting string 5 connected to the prostate chip 10. Here, Fig. 2(A) is a perspective view of the prostate chip 10 as seen from the first surface side, which will be described later, and Fig. 2(B) is a perspective view of the prostate chip 10 as seen from the second surface side, which will be described later. Also, Fig. 3(A) is a perspective view showing the structure of the thread connecting part 15 as seen from the first surface side, and Fig. 3(B) is a perspective view showing the structure of the thread connecting part 15 as seen from the second surface side.

[0013] Also, Figure 4(A) is an oblique view showing the state in which both ends of the connecting cord 5 are passed through the first connecting hole 23 and the second connecting hole 33, as viewed from the first surface side, and Figure 4(B) is an enlarged plan view showing the portion of the thread connecting portion 15 in the connected state of the connecting cord 5, as viewed from the first surface side.

[0014] The connecting string 5 is used to pull the prostate chip 10 toward the external urethral meatus when removing the prostate chip 10 placed inside the urethra or when adjusting its position inside the urethra. The connecting string 5 is a single thread, and a stopper knot (single knot) 6 is formed in the middle of the string. Each end of the connecting string 5 functions as a pulling string 7, as will be described later.

[0015] The prostate chip 10 has a long, thin, flat plate shape, and is formed with wide, flat protrusions 11 at three locations in the longitudinal direction: the tip, the center, and the base. A thread connecting part 15 is provided at the base of the flat protrusion 11, which is located on the external urethral meatus side when the prostate chip is placed in the urethra, for detachably connecting the connecting string 5 by passing it through a hole.

[0016] The thread connecting portion 15 has a first thread connecting hole portion 21 having a first connecting hole 23, a second thread connecting hole portion 31 having a second connecting hole 33, and a push-out hole 40. That is, the thread connecting portion 15 has two systems of connecting holes 23, 33, and by passing both ends of a single thread, the connecting string 5, through the respective connecting holes 23, 33, the prostate chip 10 can be pulled by two threads (pulling strings 7) (see Figures 1, 4, etc.).

[0017] The first connecting hole 23 has a hole entrance 23a formed on the first surface side, which is one flat surface (chip surface) of the prostate chip 10, and proceeds in the chip width direction parallel to the chip surface, then proceeds in the thickness direction toward the opposite second surface side, and then is folded back approximately 180° while proceeding in the chip width direction parallel to the chip surface at the first folding portion 24, and while returning to the first surface side, is further folded approximately 90° toward the base side of the prostate chip 10 at the first folding portion 26, and proceeds in the chip longitudinal direction approximately parallel to the chip surface to reach the hole exit 23b formed on the side surface at the base side of the prostate chip 10.

[0018] In this way, the first connecting hole 23 has a first fold portion 24 that folds back approximately 180 degrees in the thickness direction, and a first bent portion 26 that bends approximately 90 degrees from the thickness direction toward the longitudinal direction of the chip, so that the connecting cord 5 passing through the first connecting hole 23 comes into contact with the inner wall surface of the first connecting hole 23 at many points at the first fold portion 24 and the first bent portion 26.

[0019] Therefore, due to friction with the inner wall surface of first connecting hole 23, connecting string 5 is firmly connected to first thread connecting hole portion 21 without slipping out of first connecting hole 23. Furthermore, connecting string 5, which has been connected through first connecting hole 23, can be pulled out and removed from first connecting hole 23 by, for example, pushing from hole exit 23b and pulling from hole entrance 23a. Connecting string 5 is detachably connected to prostate chip 10.

[0020] The opening 23a of the first connecting hole 23 is smaller than the knot 6 of the connecting cord 5 so that the knot 6 will not pass through (see FIG. 4, etc.). Therefore, even if the end of the connecting cord 5 protruding from the opening 23b of the first connecting hole 23 is pulled, the knot 6 will not enter the inside of the first connecting hole 23 through the opening 23a, and therefore the entire connecting cord 5 will not be pulled out from one of the openings 23b, 33b of the connecting holes 23, 33.

[0021] The first folded portion 24 of the first connecting hole 23 has a folded horizontal cavity 25, and the first folded portion 24 widens at the folded horizontal cavity 25 toward the tip side in the chip longitudinal direction, i.e., on the opposite side to the hole outlet 23b.

[0022] In a configuration without the folded horizontal cavity 25, when the tip end of the connecting string 5 that passes through the first connecting hole 23 and protrudes from the hole exit 23b is pushed back into the inside of the first connecting hole 23, the connecting string 5 is pushed back along the entire first connecting hole 23, and the connecting string 5 pushed back at the hole entrance 23a may protrude outside the prostate chip 10.

[0023] On the other hand, if a fold-back horizontal cavity 25 is formed, even if the connecting string 5 protruding from the hole exit 23b is pushed back, the pushed connecting string 5 can absorb the pushing force by expanding toward the tip side in the fold-back horizontal cavity 25, thereby preventing it from being pushed back to the connecting string 5 located near the hole entrance 23a.

[0024] The first thread connecting hole portion 21 has a first inlet opening recess 27 formed around the hole entrance 23a, and the portion near the entrance extending from the hole entrance 23a of the first connecting hole 23 in the chip width direction parallel to the chip surface is located within the first inlet opening recess 27 and opens to the first surface side through the first inlet opening recess 27.

[0025] In addition, the first thread connecting hole portion 21 has a first fold opening recess 28 formed on the second surface side at the first fold portion 24, and the first fold portion 24 of the first connecting hole 23 opens to the second surface side through the first fold opening recess 28.

[0026] In a configuration without the first folded opening recess 28, the task of folding back the tip of one end of the connecting cord 5 inserted from the hole entrance 23a on the first surface side by approximately 180 degrees at the first folded portion 24 and inserting it further into the first folded portion 26 at the back is a highly difficult task that cannot be observed or touched from the outside.

[0027] In contrast, by forming the first fold opening recess 28, the tip of the connecting cord 5 inserted from the hole entrance 23a can be first removed from the first fold opening recess 28 to the second surface side, then turned over and inserted toward the first fold portion 26 while visually checking the inside of the first fold opening recess 28, making it easy to pass the connecting cord 5 through the first connecting hole 23, which is bent multiple times.

[0028] Next, the second connecting hole 33 is parallel to the longitudinal direction of the chip and perpendicular to the chip surface, and is formed symmetrically to the first connecting hole 23 with respect to the center plane located in the middle between the first connecting hole 23 and the second connecting hole 33.

[0029] That is, the second connecting hole 33 has the same shape as the first connecting hole 23, and is formed with a hole entrance 33a, a second folded portion 34, a folded horizontal cavity 35, and a second folded portion 36. Similarly to the first thread connecting hole 21, the second thread connecting hole 31 is provided with a second entrance opening recess 37 and a second folded opening recess 38.

[0030] The extrusion hole 40 is a cylindrical hole that penetrates the prostate chip 10 in the thickness direction at the center between the hole entrance 23a of the first connecting hole 23 and the hole entrance 33a of the second connecting hole 33. The first hole entrance 23a and the second hole entrance 33a are located on the first surface side of the extrusion hole 40, and the extrusion hole 40, the first entrance opening recess 27, and the second entrance opening recess 37 together form a recess.

[0031] The connecting string 5 located near the hole entrances 23a, 33a is located within this integrated recess, and the knot 6 located outside the hole entrances 23a, 33a is located and stored within the extrusion hole 40 on the first surface side, and is not exposed to the outside of the prostate chip 10 (see FIG. 4, etc.). In this way, by positioning the knot 6 of the connecting string 5, which is a protruding part, within the recess (extrusion hole 40), it is possible to prevent the user from feeling pain, etc., caused by the knot 6 coming into contact with the wall of the urethra.

[0032] Furthermore, in this embodiment, the knot 6 is stored in the extrusion hole 40, and even if the connecting cord 5 is pushed back from the hole exit 23b, 33b side, the connecting cord 5 near the hole entrance 23a, 33a is not pushed back, so the connecting cord 5 cannot be easily removed from the connecting holes 23, 33.

[0033] In contrast, in this embodiment, which is equipped with an extrusion hole 40, a thin pin can be inserted from the second surface side of the extrusion hole 40 until it protrudes toward the first surface side, allowing the knot 6 of the connecting cord 5 to be pushed out of the extrusion hole 40 by the pin, making it easy to remove the connecting cord 5 from the connecting holes 23, 33.

[0034] Here, the size of the urethral indwelling device 1 according to this embodiment will be explained. Of course, this size is merely an example and can be changed as appropriate. The total length of the prostate chip 10 in the chip longitudinal direction is about 30 mm, the chip width is about 7 to 9 mm at the flat protrusion portion 11, the width of the constricted portion is about 2 to 4 mm, and the chip thickness is about 2 to 3 mm.

[0035] The diameter of the connecting cord 5 is about 0.25 mm, and the maximum diameter of the knot 6 is about 1 mm. The connecting holes 23, 33 generally have a diameter of about 0.5 mm, with the diameter of the narrowest part, such as the hole entrance 23a, being about 0.3 mm. The diameter of the extrusion hole 40 is about 1 mm.

[0036] The configuration of the urethral retainer 1 according to this embodiment has been described above. According to the urethral retainer 1, a knot 6 is formed in the middle of one connecting cord 5, and two systems of first connecting holes 23 and second connecting holes 33 are formed in the prostate chip 10. Both ends of the connecting cord 5 are passed through connecting holes 23, 33 from hole entrances 23a, 33a which are smaller than the knot 6, and are then pulled out from hole exits 23b, 33b. The knot 6 gets caught in hole entrances 23a, 33a and does not enter connecting holes 23, 33.

[0037] That is, if the urethral retention device 1 is equipped with a connecting string 5 with a knot 6 formed thereon and a prostate chip 10 with two systems of connecting holes 23, 33 having hole entrances 23a, 33a smaller than the knot 6, the connecting string 5 can be securely and detachably connected to the prostate chip 10 without using adhesive or tying the string to holes in the chip.

[0038] In this embodiment, both ends of one connecting string 5 are passed through the connecting holes 23, 33, and the ends of the connecting string 5 pulled out from the hole exits 23b, 33b function as two pulling strings 7. The two pulling strings 7 are made up of one connecting string 5, and the pulling string 7 will not easily come off the prostate chip 10.

[0039] Furthermore, because two pulling strings 7 are installed, even if one pulling string 7 breaks, the prostate chip 10 can be safely pulled out from the urethra using the remaining pulling string 7. In this case, even if the remaining pulling string 7 is pulled from the hole exit 23b, 33b side, the knot 6 will be caught on the hole entrance 23a, 33a, and the prostate chip 10 will not come out.

[0040] Furthermore, because urethral indwelling device 1 is left in the body for an extended period of time, it is desirable for urethral indwelling device 1 to meet biocompatibility standards, and because no adhesive or the like is required to connect connecting cord 5 and prostate chip 10, biocompatibility is easily achieved.

[0041] Furthermore, in this embodiment, the connecting holes 23, 33 include folded portions 24, 34 that fold back approximately 180 degrees and second folded portions 26, 36 that fold back approximately 90 degrees, and are folded large multiple times, thereby increasing the contact area between the connecting cord 5 and the inner wall surface of the connecting holes 23, 33. Therefore, even if the end of the connecting cord 5 is pushed back toward the prostate chip 10, friction makes it difficult for the connecting cord 5 to move in the direction of extension of the connecting holes 23, 33, and the connecting cord 5 will not jump out of the connecting holes 23, 33 or easily come off.

[0042] Furthermore, if the connecting string 5 protrudes from the connecting holes 23, 33, the connecting string 5 may come into contact with the wall of the urethra, causing pain to the user, or the connecting strings 5 ​​may become entangled with each other or with part of the prostate chip 10. However, according to this embodiment, such cases can be prevented from occurring.

[0043] Furthermore, if a string is tied directly to a hole in the chip, there is a risk that the string may come loose or the knot may become exposed on the surface of the chip, causing pain to the user. However, this embodiment can prevent such cases from occurring.

[0044] Although the first embodiment has been described in detail above, the present invention is not limited to the above embodiment and various modifications are possible. For example, the shape, size, material, etc. of the components constituting the urethral indwelling device 1 can be modified as appropriate. The prostate chip 10 may be in the shape of a round rod, etc., instead of a flat plate.

[0045] In addition, in the above embodiment, the connecting holes 23, 33 are provided with approximately 180° fold sections 24, 34 and approximately 90° bent sections 26, 36, bending the connecting holes 23, 33 a total of approximately 270°, but other bending structures can be adopted as appropriate as long as the contact area between the connecting cord 5 and the inner wall surface of the connecting holes 23, 33 can be increased and the frictional force can be increased.

[0046] For example, three approximately 90° folds may be combined, or a 150° fold and a 90° fold may be combined. However, to ensure a certain contact area between the connecting cord 5 and the connecting holes 23, 33 and obtain frictional force, it is desirable to fold the connecting cord 5 multiple times and bend the connecting holes 23, 33 a total of 220° or more. It is even more desirable for the connecting holes 23, 33 to have folds that are folded back 150° or more.

[0047] In the above embodiment, the first thread connecting hole 21 and the second thread connecting hole 31 are symmetrical with respect to each other, but of course they may be asymmetrical.

[0048] Furthermore, in the above embodiment, the prostate chip 10, which is placed in the prostate gland, has been described as an example of a thin rod-shaped urethral indwelling chip that is placed in the urethra. However, the present invention can also be applied to chips that are placed in other locations as appropriate, as long as they are placed in the urethra.

[0049] In addition, in the above embodiment, a knot 6 that is larger than the hole entrances 23a, 33a is formed in the middle of the connecting cord 5 to prevent the connecting cord 5 from being pulled from the hole exits 23b, 33b and moving, but a configuration other than the knot 6 can be used as long as the large diameter portion is too large to pass through the hole entrances 23a, 33a.

[0050] For example, the large-diameter portion larger than the hole entrances 23a and 33a can be formed by thickening the thread of the connecting cord 5 itself, or by fixing a spherical biocompatible resin member to the connecting cord 5. Furthermore, the knot 6 is not limited to a stopper knot, and other types of knots such as a double knot or a figure-eight knot can also be used.

[0051] Second Embodiment Next, a second embodiment of the present invention will be described. The urethral indwelling device 2 according to the second embodiment is characterized by a difference in the structure of the thread connecting portion 65 from the first embodiment, and therefore this difference will be described in detail, while the same components as in the first embodiment will be designated by the same names and their description will be omitted.

[0052] The urethral indwelling device 2 comprises a prostate tip 60 and a connecting string 5. A flat protrusion 61 is formed on the prostate tip 60, and a thread connecting part 65 is formed on the part of the flat protrusion 61 located on the base side.

[0053] The thread connecting portion 65 includes a first thread connecting hole portion 71 having a first connecting hole 73, a second thread connecting hole 81 having a second connecting hole 83, and an extrusion hole 90. The first connecting hole 73 includes a hole entrance 73a, a hole exit 73b, a first folded portion 74, and a first folded portion 76 having a folded horizontal hole 75. The second connecting hole 83 includes a hole entrance 83a, a hole exit 83b, a second folded portion 84, and a second folded portion 86 having a folded horizontal hole 85.

[0054] Also, similar to the first embodiment, the first thread connecting hole portion 71 has a first entrance opening recess 77 formed around the hole entrance 73a on the first surface side and a first folded opening recess 78 formed near the first folded portion 74 on the second surface side, and the second thread connecting hole portion 81 has a second entrance opening recess 87 formed around the hole entrance 83a on the first surface side and a second folded opening recess 88 formed near the second folded portion 84 on the second surface side.

[0055] In the first embodiment, the folded portions 24, 34 of the connecting holes 23, 33 are folded back while advancing in the chip width direction, whereas in the second embodiment, the folded portions 74, 84 of the connecting holes 73, 83 are folded back while advancing in an arc direction centered on the extrusion hole 90.

[0056] With respect to the inlet opening recesses 77, 87 on the first surface side, the hole inlet 73a, the extrusion hole 90, and the hole inlet 83a are aligned in a row in the chip longitudinal direction. The folded portions 74, 84 extend in an arc-like manner clockwise at an angle of about 45° when viewed from the first surface side, and the bent portions 76, 86 located beyond them are aligned in a row in the chip width direction, sandwiching the extrusion hole 90 therebetween.

[0057] This embodiment also provides the same effects as the first embodiment, and furthermore, according to the second embodiment in which the folded portions 74, 84 extend in an arc shape, the size in the chip width direction can be reduced.

[0058] If the width of the prostate chip 60 placed inside the urethra is too large, it may not be possible to insert it into the urethra or it may be difficult to insert, so there is a great advantage in being able to reduce the width of the chip.

[0059] The second embodiment has been described above, but similar to the first embodiment, various modifications are possible in this embodiment as well. [Explanation of symbols]

[0060] 1 Urethral indwelling device 5. Connecting cord 6. Knot 7 Pull cord 10 Prostate Chip 11 Flat protrusion 15 Thread connection part 21 First thread connection hole 23 First connection hole 23a hole entrance 23b hole exit 24 First turn-around section 25 Turning Side Cave 26 First bending part 27 First entrance opening recess 28 First folded opening recess 31 Second thread connection hole 33 Second connection hole 33a hole entrance 33b hole exit 34 Second fold 35 Turning Side Cave 36 Second bending part 37 Second entrance opening recess 38 Second folded opening recess 40 extrusion holes 2 Urethral indwelling device 5. Connecting cord 6. Knot 60 Prostate Chips 61 Flat protrusion 65 Thread connection part 71 First thread connection hole 73 First connection hole 73a hole entrance 73b hole exit 74 First turn-around section 76 First bending part 75 Folding Horizontal Cave 77 First entrance opening recess 78 First folded opening recess 81 Second thread connection hole 83 Second connection hole 83a Cave entrance 83b hole exit 84 Second fold 86 Second bending part 85 Folding Horizontal Cave 87 Second entrance opening recess 88 Second folded opening recess 90 extrusion holes A Bladder B. Prostatic urethra C bulbar urethra D Pendulum urethra E. External urethral meatus J internal urethral sphincter K External urethral sphincter L ejaculatory duct

Claims

1. A urethral indwelling device comprising a rod-shaped urethral indwelling tip to be placed in the urethra and a connecting string connected to the urethral indwelling tip, The connecting string is a single thread having a large diameter portion formed therein, the urethral placement tip has a first connecting hole and a second connecting hole, which are connecting holes through which the connecting string passes and have hole entrances smaller than the large diameter portion so as not to pass through the large diameter portion; a urethral retention device characterized in that the connecting string functions as two pulling strings for pulling out the urethral retention tip from the urethra by passing both ends of the connecting string through the first connecting hole and the second connecting hole from the hole entrances and pulling out the connecting string from the respective hole exits.

2. The urethral retention device according to claim 1, characterized in that the urethral retention tip has an entrance opening recess that opens onto its surface, the hole entrance of the first connecting hole and the hole entrance of the second connecting hole are located close to each other within the entrance opening recess, and the large diameter portion is configured to be able to be housed within the entrance opening recess.

3. The urethral retention device according to claim 2, characterized in that the urethral retention tip has a columnar hole that penetrates the urethral retention tip and is located between the hole entrance of the first connecting hole and the hole entrance of the second connecting hole, and the large diameter portion can be pushed out from inside the entrance opening recess by passing a pin through the columnar hole from the opposite side to the entrance opening recess.

4. 4. The urethral indwelling device according to claim 1, wherein the first connecting hole and the second connecting hole are each bent multiple times, each bent at a total angle of 220° or more.

5. The first connecting hole has a first folded portion folded back by 150° or more, The urethral indwelling device according to any one of claims 1 to 4, wherein the second connecting hole is provided with a second folded portion folded back at an angle of 150° or more.

6. The urethral retention device according to claim 5, characterized in that the urethral retention tip comprises a first folded opening recess for opening the first folded portion to the surface, and a second folded opening recess for opening the second folded portion to the surface.

7. The first folded portion has a first folded horizontal cavity extending on the opposite side to the hole exit of the first connecting hole, The urethral indwelling device according to claim 5 or 6, wherein the second folded portion comprises a second folded horizontal cavity that expands on the side opposite to the hole exit of the second connecting hole.

8. 8. The urethral indwelling device according to claim 1, wherein the large diameter portion is a knot of a thread.

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