Ureteral stent pulling-out device through catheter under blind vision

Abstract

The invention belongs to the technical field of application of urinary surgery in ureteral stent extraction, and particularly relates to a device for extracting a ureteral stent through a catheter under blindsight, the device comprises a catheter, a human bladder, a push tube and a buoyancy direction identifier, an air bag is fixedly embedded in the outer surface of the catheter, the right end of the catheter is fixedly communicated with a liquid outlet, and the right end of the catheter is fixedly communicated with the liquid outlet. The outer surface of the right end of the catheter is fixedly communicated with a water injection hard valve, a thread hook rod part is arranged in the catheter in a sleeved mode, and the left end of the thread hook rod part is fixedly connected with thread hook parts which are arranged in an annular mode. Through the arrangement of the catheter, the air bag, the line hook part and the line hook rod part, the ureteral stent can be pulled out under blind vision, a working channel can be established through the catheter to pull out a floating ring, a silk thread and the ureteral stent in a wire drawing mode, and compared with traditional straight and hard cystoscope sheath direct-vision pulling out, the pulling out efficiency is greatly improved. And the operation is simple, the reusability is high, the removal can be completed by only one surgeon, and the device is worthy of popularization and use.

Description

Technical Field

[0001] The invention relates to the technical field of application of ureteral stent removal in urology, in particular to a blind transcatheter ureteral stent removal device. Background Art

[0002] Urology is a hospital department that mainly diagnoses and treats diseases of the "surgical" part of the urinary system. It mainly treats various urinary diseases. Currently, ureteral removal in clinical practice is basically done by removing the ureteral stent through cystoscopy under local anesthesia. Another removal method is to remove the ureteral stent with a thread. The ureteral stent with a thread is removed manually after the silk thread sewn on the ureteral stent is discharged from the body.

[0003] However, there are still some shortcomings in the process of ureteral removal. The cost of removing ureteral stents through cystoscopic surgery is relatively expensive. During the insertion of the cystoscopic sheath, patients experience severe urethral pain, especially male patients. In addition, the urethra is prone to bleeding, which leads to blurred cystoscopic vision and difficulty in removing the ureteral stent. The traditional cystoscopic removal method requires the operator to have certain surgical experience, and is prone to complications such as hematuria, false passages, and even severe bladder-rectal fistulas. The operation requires the cooperation of multiple people to complete. The ureteral stent removal method with a thread has different ureteral removal times for different patients and different surgical procedures, and the sutures sewn on the ureteral stent are discharged randomly, so sutures are often retained in the urethra until the ureteral stent is removed, and the patient has a foreign body sensation in the urethra, which greatly increases the risk of urinary tract infection.

[0004] To this end, we provide a blind transcatheter ureteral stent extraction device to solve the above problems. Summary of the invention

[0005] In view of the deficiencies of the prior art, the present invention provides a blind transcatheter ureteral stent removal device, which solves the problem that the current removal of ureteral stents through cystoscopic surgery is relatively expensive, and during the insertion of the cystoscopic sheath, the patient suffers from severe urethral pain, especially in male patients. In addition, the urethra is prone to bleeding, resulting in blurred cystoscopic vision and difficulty in removing the ureteral stent. The traditional cystoscopic removal method requires the operator to have certain surgical experience, and is prone to complications such as hematuria, false passages, and even bladder-rectal fistulas. The operation requires the cooperation of multiple people to complete. The wired ureteral stent removal method has different ureteral removal times for different patients and different surgical procedures, and the sutures sewn on the ureteral stent are discharged randomly, so sutures are often retained in the urethra until the ureteral stent is removed, and the patient has a foreign body sensation in the urethra, which greatly increases the risk of urinary tract infection.

[0006] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: a blind ureteral stent extraction device through a ureteral catheter, comprising a ureteral catheter, a human bladder, a push tube and a buoyancy direction mark, wherein an air bag is fixedly inlaid on the outer surface of the ureteral catheter, a liquid outlet is fixedly connected to the right end of the ureteral catheter, a water injection hard valve is fixedly connected to the outer surface of the right end of the ureteral catheter, a wire hook rod is sleeved inside the ureteral catheter, a wire hook portion arranged in a ring is fixedly connected to the left end of the wire hook rod, a waterproof cap is sleeved on the outer surface of the wire hook rod, the outer surface of the left end of the waterproof cap is clamped with the inner wall of the right end of the urethral catheter, a floating ring, a silk thread and a ureteral stent are arranged inside the human bladder, a zebra guide wire is sleeved inside the floating ring, and the buoyancy direction mark is divided into two drawing number forms.

[0007] As a preferred technical solution of the present invention, the hook portion of the wire hook is soft and can be deformed to the same size as the inner diameter of the catheter, the tip of the hook portion is retracted, and the surface is smooth. The hook portion of the wire hook is made of the same material as the rod portion of the wire hook.

[0008] As a preferred technical solution of the present invention, the floating ring is elastically deformable and is tubular. It can be put on the outside of the zebra guide wire and enter the bladder along the zebra guide wire under the action of pushing the tube. It curls up naturally and can be straightened under force and its density is less than water.

[0009] As a preferred technical solution of the present invention, the outer surface of the floating ring is sprayed with an antibacterial coating.

[0010] As a preferred technical solution of the present invention, the length of the silk thread is about 6 cm and has a certain hardness and elasticity.

[0011] As a preferred technical solution of the present invention, a model mark is provided on the front of the catheter, and the model mark is located in the middle of the right end of the catheter.

[0012] As a preferred technical solution of the present invention, the outer surface of the wire hook rod is provided with scale lines.

[0013] Compared with the prior art, the present invention provides a blind transcatheter ureteral stent extraction device having the following features:

[0014] Beneficial effects:

[0015] The device for removing ureteral stents through catheter under blind vision can realize the removal of ureteral stents under blind vision by means of the arranged ureteral catheter, air bag, wire hook part and wire hook rod part. The working channel can be established by the ureteral catheter to pull out the floating ring, silk thread and ureteral stent. Compared with the traditional straight and hard cystoscope sheath direct vision removal, the device is cheaper and painless, simple to operate, and highly repeatable. Only one surgeon is needed to complete the removal, and the device is worthy of popularization and use. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a schematic diagram of the overall three-dimensional structure of a blind transcatheter ureteral stent extraction device of the present invention (the left picture shows the wire hook extending into the interior of the urethral catheter. The right picture shows the wire hook, which includes a wire hook rod, a wire hook portion, and a waterproof cap covered on the wire hook rod);

[0017] Figure 2 This is a schematic diagram of the overall structure of the modified ureteral stent of the present invention;

[0018] Figure 3 The end of the urinary catheter is cut off according to the present invention (the left picture is before cutting, and the right picture is after cutting);

[0019] Figure 4 This is a diagram of the process of inserting the modified ureteral stent through the zebra guidewire of the present invention (the right side is an enlarged view of the floating ring part);

[0020] Figure 5 This is a top view of the patient in a supine position after the zebra guidewire is pulled out of the present invention;

[0021] Figure 6 This is a top view of a human body in a supine position with a modified urinary catheter inserted into it according to the present invention;

[0022] Figure 7 This is a side view of a human body in a supine position with the modified urinary catheter inserted into it according to the present invention;

[0023] Figure 8 This is a front view of a human body in a supine position with a modified urinary catheter inserted according to the present invention (looking from the head to the feet);

[0024] Fig. 9 It is a top view of a human body in a supine position after the hook is inserted into the thread of the present invention;

[0025] Fig.10 This is a front view of a human body in a supine position (looking from the head to the feet) after the hook portion of the wire hook of the present invention is inserted;

[0026] Fig.11 It is a side view of a human body in a supine position after the hook portion of the wire hook is inserted into the present invention;

[0027] Fig.12 It is a process diagram of turning from a supine position to an affected side decubitus position after the hook portion of the wire hook is placed in the present invention;

[0028] Fig.13 This is an oblique view of the patient in the lateral position of the present invention (obliquely viewed from the forehead to the heel. The left picture is an overall view, and the right picture is an enlarged view of the urinary system);

[0029] Fig.14 The invention is a human bladder enlargement in the side-lying position Figure 1 ;

[0030] Fig.15 The invention is a magnified image of a human bladder in a side-lying position Figure 2 ;

[0031] Fig.16 The invention is a magnified image of a human bladder in a side-lying position Figure 3 .

[0032] In the figure: 1. urinary catheter; 2. air bag; 3. model mark; 4. liquid outlet; 5. water injection hard valve; 6. waterproof cap; 7. scale line; 8. wire hook rod; 9. wire hook; 10. zebra guide wire; 11. float ring; 12. human bladder; 13. silk thread; 14. ureteral stent; 15 push tube; 16 buoyancy direction mark.

[0033] Note: 16 Buoyancy direction mark: The direction indicated by the arrow is the direction of buoyancy, and an "X" indicates that the buoyancy direction is perpendicular to the paper surface and outward. DETAILED DESCRIPTION

[0034] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0035] Example

[0036] See also Figure 1-16 In this embodiment: a blind transcatheter ureteral stent extraction device comprises a urethral catheter 1, a human bladder 12, a push tube 15 and a buoyancy direction mark 16, an outer surface of the urethral catheter 1 is fixedly inlaid with an air bag 2, a right end of the urethral catheter 1 is fixedly connected with a liquid outlet 4, a right end outer surface of the urethral catheter 1 is fixedly connected with a water injection hard valve 5, a wire hook rod 8 is sleeved inside the urethral catheter 1, a wire hook 9 arranged in an annular manner is fixedly connected to the left end of the wire hook rod 8, a waterproof cap 6 is sleeved on the outer surface of the wire hook rod 8, a left end outer surface of the waterproof cap 6 is clamped with the right end inner wall of the urethral catheter 1, a floating ring 11, a silk thread 13 and a ureteral stent 14 are arranged inside the human bladder 12, a zebra guide wire 10 is sleeved inside the floating ring 11, and the buoyancy direction mark 16 is divided into two figure number forms.

[0037] In this embodiment, the hook portion 9 of the wire hook is soft and can be deformed to the same size as the inner diameter of the catheter 1, and the tip of the hook portion 9 is inward-retracted and has a smooth surface. The hook portion 9 is made of the same material as the hook rod 8, which can facilitate the hook portion 9 to enter and exit the bladder and urethra without damaging the mucosa, thereby facilitating the safe insertion of the hook portion 9. The float ring 11 can be elastically deformed and is tubular. It can be put on the outside of the zebra guide wire 10 and enter the bladder 12 along the zebra guide wire 10 under the action of the push tube 15. It curls up naturally and can be straightened under force. Its density is less than that of water, so that the float ring 11 can provide sufficient buoyancy in the water, which is convenient for floating in the human bladder 12.

[0038] The outer surface of the float 11 is sprayed with an antibacterial coating, which can increase the antibacterial function of the float 11 and facilitate the inhibition of stone formation. The silk thread 13 is about 6 cm long and has a certain hardness and elasticity. It is not easy to bend, preventing urine from flushing it out of the urethra.

[0039] A model mark 3 is provided on the front of the catheter 1, and the model mark 3 is located in the middle of the right end of the catheter 1, which can explain the model of the catheter 1 and is convenient for medical personnel to use. A scale line 7 is provided on the outer surface of the wire hook rod 8, which can facilitate understanding of the insertion depth of the wire hook rod 8.

[0040] The working principle and use process of the present invention: the use of this product is divided into three steps, namely the first step: the production of the device; the second step: the insertion of the modified ureteral stent 14; the third step: the removal of the ureteral stent 14, and the removal process is divided into a supine position stage and an affected side decubitus position stage.

[0041] Step 1: Making the device

[0042] (1) Modification of the urinary catheter 1: Figure 3 (The shape of the balloon 2 when it is inflated, the left side is before the modification, and the right side is after the modification), the urinary catheter 1 is modified, and on the basis of the traditional double-lumen urinary catheter, the blind end of the urinary catheter 1 is cut off and the balloon 2 is retained.

[0043] (2) Ureteral stent modification: Figure 2 A floating ring 11 is added to one side of a traditional ureteral stent 14, and the two are connected by a silk thread 13. The silk thread 13 connects the two smoothly, firmly, and is not easy to tangle.

[0044] (3) Wire hook production Figure 1 .

[0045] Step 2: Placement of modified ureteral stent 14

[0046] Under the ureteroscope, guided by the zebra wire 10 and pushed by the push tube 15, the ureteral stent 14 enters the renal pelvis along the zebra wire 10, followed by the silk thread 13 and the float ring 11; the float ring 11 is sheathed outside the zebra wire 10 and enters the bladder 12 along the zebra wire 10 like the ureteral stent 14. Figure 4 , the left side is an overall view, and the right side is an enlarged view of the floating ring 11.

[0047] Then, the zebra wire 10 is pulled out. After the zebra wire 10 is pulled out, the float ring 11 is not affected by the force of the zebra wire 10 and begins to curl up. Under the action of buoyancy, the float ring 11 begins to float up and tightens the wire 13. Figure 5 , the left side is the overall view, and the right side is the enlarged view of the urinary system.

[0048] Step 3: Removal of ureteral stent 14 (divided into supine position stage and affected side decubitus position stage)

[0049] Supine stage:

[0050] (1) Ask the patient to lie flat with legs apart. First, insert the modified catheter into the bladder, inject 10 ml of water into the airbag 2 through the water injection hard valve 5, and then pull the catheter 1 as far as possible to fix the catheter 1 and the airbag 2 to the bladder neck. Drain the urine completely, and then inject 300 ml of saline into the bladder 12 through the water outlet 4 to fill the bladder 12 as much as possible. The float 11 begins to float up under the action of buoyancy, and the silk thread 10 is tightened. At this time, the spatial position relationship between the airbag 2, the silk thread 13, and the float 11 can be seen through the three-view drawing ( Figure 6 , Figure 7 , Figure 8 The buoyancy direction is indicated by the buoyancy direction symbol 16 at the lower right corner of the three-view drawing. Figure 6 It is a top view, with the left side showing the overall view and the right side showing an enlarged view of the urinary system. Figure 7 is a side view, Figure 8 Front view (from the head to the foot)

[0051] (2) The hook portion 9 of the wire hook is inserted into the bladder 12 through the catheter 1. When resistance is encountered, the hook portion 9 of the wire hook has already hit the bladder wall. At the same time, the liquid outlet 4 is blocked with the waterproof cap 6 to prevent the leakage of saline. At this time, the spatial position relationship between the hook portion 9, the float 11 and the silk thread 13 is represented by a three-view drawing. Fig. 9 It is a top view, with the overall view on the left and the enlarged view of the urinary system on the right. Fig.10 It is a front view (viewed from the head to the foot). The left side is the overall view, and the right side is an enlarged view of the urinary system. Fig.11 It is a side view, with the left side showing the whole picture and the right side showing the enlarged picture of the urinary system

[0052] Side-lying position stage:

[0053] The patient begins to lie on the affected side. Under the action of buoyancy, the float ring 11 begins to float up, and the silk thread 13 is tightened. At this time, the silk thread 13 is placed on the hook rod 8. The process is as follows: Fig.12 At this time, the positional relationship among the float 11, the silk thread 13 and the hook portion 9 is shown by combining the front view: Fig.12 and side view Fig.13 (Side view in the affected side lying position, the left side is the overall view, the right side is the enlarged view of the urinary system)

[0054] At this time, pull the hook part 9 outwards, and the process is as follows. Fig.14 When the scale line 7 shows that the wire hook rod 8 is equal to the length of the catheter 1, it means that the wire hook 9 has been stuck at the end of the catheter 1. At this time, the silk thread 13 has been tightly locked, and the water in the air bag 2 is released through the water injection hard valve 5. The air bag 2 is collapsed, which makes it easier for the catheter 1 to be pulled out of the urethra. Fig.15 The urinary catheter 1 and the wire hook rod 8 are kept relatively still and pulled out together. Finally, under the pulling force of the silk thread 13, the ureteral stent 14 is taken out together. Fig.16 , complete the surgical operation.

[0055] In the description of the present invention, the terms "comprises", "comprising" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device comprising a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, the elements defined by the statement "comprising a reference structure" do not exclude the presence of other identical elements in the process, method, article or device comprising the elements. It should be noted that, in this article, relational terms such as "first", "second", etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations.

[0056] Finally, it should be noted that the above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art can still modify the technical solutions described in the aforementioned embodiments or replace some of the technical features therein by equivalents. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A blind ureteral stent extraction device through a ureteral catheter, comprising a ureteral catheter (1), a human bladder (12), a push tube (15) and a buoyancy direction indicator (16), characterized in that: The outer surface of the urinary catheter (1) is fixedly inlaid with an air bag (2), the right end of the urinary catheter (1) is fixedly connected to a liquid outlet (4), the outer surface of the right end of the urinary catheter (1) is fixedly connected to a water injection hard valve (5), the interior of the urinary catheter (1) is sleeved with a wire hook rod (8), the left end of the wire hook rod (8) is fixedly connected to a ring-arranged wire hook (9), the outer surface of the wire hook rod (8) is sleeved with a waterproof cap (6), the left end outer surface of the waterproof cap (6) is clamped with the inner wall of the right end of the urinary catheter (1), the interior of the human bladder (12) is provided with a floating ring (11), a silk thread (13) and a ureteral stent (14), the interior of the floating ring (11) is sleeved with a zebra guide wire (10), and the buoyancy direction mark (16) is divided into two types of figure number forms.

2. A blind transcatheter ureteral stent extraction device according to claim 1, characterized in that: The hook portion (9) of the wire hook is soft and can be deformed to a size that is the same as the inner diameter of the urinary catheter (1). The tip of the hook portion (9) of the wire hook is inwardly retracted and has a smooth surface. The hook portion (9) of the wire hook is made of the same material as the hook rod portion (8).

3. The blind transcatheter ureteral stent extraction device according to claim 1, characterized in that: The floating ring (11) is elastically deformable and is in a tubular shape. It can be put on the outside of the zebra guide wire (10) and enter the bladder (12) along the zebra guide wire (10) under the action of the push tube (15). It curls up naturally and can be straightened when stressed. Its density is less than that of water.

4. The blind transcatheter ureteral stent extraction device according to claim 1, characterized in that: The outer surface of the floating ring (11) is sprayed with an antibacterial coating.

5. The blind transcatheter ureteral stent extraction device according to claim 1, characterized in that: The silk thread (13) is about 6 cm long and has a certain hardness and elasticity.

6. The blind transcatheter ureteral stent extraction device according to claim 1, characterized in that: A model mark (3) is provided on the front of the urinary catheter (1), and the model mark (3) is located in the middle of the right end of the urinary catheter (1).

7. The blind transcatheter ureteral stent extraction device according to claim 1, characterized in that: The outer surface of the wire hook rod (8) is provided with scale lines (7).

Images