Prostate stent conveyor with balloon

Abstract

The prostate stent conveyor with the balloon particularly relates to the technical field of medical instruments and comprises an outer tube, an inner tube coaxial with the outer tube is arranged in the middle of an inner cavity of the outer tube, the inner cavity at the left end of the inner tube is rotationally connected with a rotating assembly, and the right end of the rotating assembly is fixedly connected with a sliding assembly. The middle of the sliding assembly is fixedly connected with a guide rod, the outer surface of the guide rod is sleeved with an elastic assembly, a first guide pipe is arranged in an inner cavity of the inner pipe, the right end of the first guide pipe is fixedly connected with a balloon communicated with the inner cavity, and the inner wall of the outer pipe is fixedly connected with a guide-in assembly. According to the prostate stent conveyor with the balloon, a prostate stent can be fixed in the inner tube to be conveyed by arranging the inner tube, the stent is prevented from damaging prostate tissue of a patient in the conveying process, the stent can be fixed in the conveying process by arranging the balloon, after the stent is conveyed to a set position, the balloon is blown firstly, and then the balloon is blown to the set position. Therefore, the pain of the patient can be relieved.

Description

Technical Field

[0001] The utility model relates to the technical field of medical equipment, in particular to a prostate stent conveyor with a balloon. Background Art

[0002] A prostate stent is a metal device placed in the prostate urethra through an endoscope. It is mainly used to relieve lower urinary tract symptoms caused by benign prostatic hyperplasia. Its principle is to restore the patency of urine flow by dilating the narrow urethra, thereby relieving lower urinary tract obstruction caused by benign prostatic hyperplasia. This operation is usually performed under local anesthesia. A catheter is inserted through the urethra to the affected area, and a stent is placed to support the urethral wall to prevent it from collapsing and causing obstruction again.

[0003] Chinese patent document CN210541956U discloses a catheter for precisely releasing a prostate stent. The catheter comprises an insertion tube with a rubber balloon at one end, the air inlet of which is connected to the interior of the insertion tube. A rubber hose is connected to the end of the tube opposite the end connected to the rubber balloon. The end of the hose opposite the end connected to the insertion tube also has a gas-filled balloon. An air inlet guide is provided within the hose. The interaction between the rubber balloon, the balloon, and the air inlet guide allows for more precise stent release, preventing the stent from protruding into the bladder or urethra. This reduces the surgeon's experience requirements and mitigates the impact of human factors on stent release.

[0004] Although the device in the above patent document can place a prostate stent into the patient's body and release it accurately, the prostate stent is directly placed on the outside of the insertion tube. During the stent placement process, there is a risk of damaging human tissue and causing harm to the patient. At the same time, it is also possible to damage the prostate stent, resulting in failure of stent placement. Utility Model Content

[0005] The main purpose of the utility model is to provide a prostate stent delivery device with a balloon, which can effectively solve the problem of tissue damage caused by stent implantation.

[0006] In order to achieve the above purpose, the technical solution adopted by the utility model is:

[0007] A prostate stent conveyor with a balloon comprises an outer tube, a coaxial inner tube is provided in the middle of the inner cavity of the outer tube, a rotating component is rotatably connected to the inner cavity of the left end of the inner tube, a sliding component is fixedly connected to the right end of the rotating component, a guide rod is fixedly connected to the middle of the sliding component, an elastic component is sleeved on the outer surface of the guide rod, a catheter is provided in the inner cavity of the inner tube, the catheter passes through the rotating component, the sliding component and the elastic component in sequence and extends to the right end of the inner tube, the stent is sleeved on the outer surface of the catheter at the right end of the elastic component, the right end of the catheter is fixedly connected to a balloon with an inner cavity communicating with the inner cavity, the inner wall of the outer tube is fixedly connected to an introduction component, and the left end of the introduction component is sleeved with a syringe.

[0008] Preferably, the rotating assembly includes a rotating shaft 1 rotatably connected to the left end of the inner tube, and a rotating shaft 2 is fixedly connected to the right end of the rotating shaft 1.

[0009] Preferably, the sliding assembly includes a connecting plate fixedly connected to the right end of the second rotating shaft, the right end of the connecting plate is fixedly connected to the third rotating shaft, the outer surface of the third rotating shaft is fixedly connected to a sliding plate, the right end of the third rotating shaft is fixedly connected to a guide rod, and the outer surface of the guide rod is slidably connected to a sliding seat.

[0010] Preferably, the elastic component includes a spring sleeved on the outer surface of the guide rod, and the right end of the spring and the outer surface of the guide rod are fixedly connected to a limiting block.

[0011] Preferably, the introduction component includes a medium ring fixedly connected to the inner wall of the right end of the outer tube, the left end of the medium ring is fixedly connected to a second conduit communicating with the inner cavity, the left end of the second conduit extends to the outside of the left end of the outer tube, the second conduit is located between the outer tube and the inner tube, and the right end of the medium ring is provided with a plurality of nozzles distributed in a circular array.

[0012] Preferably, the slide is a cylinder with a hollow inner cavity and an open left side. The slide is provided with two slide grooves inclined from the upper left end to the lower right end. The shape of the slide groove is adapted to the moving trajectory of the lower end when the slide rotates. The left end of the slide is provided with two grooves.

[0013] Preferably, both the outer tube and the inner tube are soft structures.

[0014] Preferably, the stent is a nickel-titanium alloy structure.

[0015] Compared with the prior art, the present invention has the following beneficial effects:

[0016] 1. The utility model can fix the prostate stent in the inner tube for transportation by providing an inner tube, a sliding component and an elastic component, so as to avoid the stent damaging the patient's prostate tissue or the stent structure being damaged during transportation. The soft structure of the outer tube and the inner tube can protect the stent and the patient.

[0017] 2. The utility model can fix the stent during the delivery process by setting a balloon. After the stent is delivered to the set position, the balloon is gradually inflated and then the stent is released, which can reduce the patient's pain. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0019] Figure 2 It is a schematic diagram of the partial cross-sectional structure of the utility model;

[0020] Figure 3 This is a schematic diagram of the structural connection of the rotating assembly, sliding assembly, and elastic assembly of the present invention;

[0021] Figure 4 This is a schematic diagram of the sliding assembly structure of the utility model;

[0022] Figure 5 This is a schematic diagram of the structure of the import component of the utility model;

[0023] Figure 6 It is a schematic diagram of a partial cross-sectional structure of another state of the utility model.

[0024] In the figure: 1. Outer tube; 2. Inner tube; 3. Rotating assembly; 31. Rotating shaft 1; 32. Rotating shaft 2; 4. Sliding assembly; 41. Connecting piece; 42. Rotating shaft 3; 43. Sliding piece; 44. Sliding seat; 441. Groove; 442. Slide; 5. Guide rod; 6. Elastic assembly; 61. Spring; 62. Limit block; 7. Bracket; 8. Balloon; 9. Catheter 1; 10. Introduction assembly; 101. Catheter 2; 102. Dielectric ring; 103. Nozzle; 11. Syringe. DETAILED DESCRIPTION

[0025] In order to make the technical means, creative features, objectives and effects achieved by the present invention easier to understand, the present invention is further described below in conjunction with specific implementation methods.

[0026] like Figure 1 and Figure 2As shown, a prostate stent delivery device with a balloon includes an outer tube 1, with a coaxial inner tube 2 disposed in the middle of the inner cavity of the outer tube 1. Both the outer tube 1 and the inner tube 2 are soft structures. When the device is delivered in the patient's body, it can prevent the stent 7 from being damaged, protect the patient's prostate tissue, and reduce the patient's pain.

[0027] The left end of the inner tube 2 is rotatably connected to the inner cavity of a rotating assembly 3, the right end of the rotating assembly 3 is fixedly connected to a sliding assembly 4, the middle of the sliding assembly 4 is fixedly connected to a guide rod 5, the outer surface of the guide rod 5 is sleeved with an elastic assembly 6, and the inner cavity of the inner tube 2 is provided with a catheter 9, which passes through the rotating assembly 3, the sliding assembly 4, and the elastic assembly 6 in sequence and extends to the right end of the inner tube 2. A bracket 7 is sleeved on the outer surface of the catheter 9 at the right end of the elastic assembly 6, and the bracket 7 is a nickel-titanium alloy structure;

[0028] Nickel-titanium alloy is an alloy composed of two elements, nickel and titanium. It has the property of shape memory, which means it can automatically recover its original shape after plastic deformation at a certain temperature. It also has corrosion resistance and superelasticity that are superior to the best medical stainless steel. Nickel-titanium alloy is widely used in the medical field due to its characteristics.

[0029] In actual use, medical staff first pre-shape the stent 7 into the required size at low temperature before surgery, deliver it to the patient's body, and then spray a medium at 40° to 45°, such as pure water, saline and other medical liquids, onto the stent 7 through the introduction component 10. The stent 7 will gradually harden, stretch, and return to the predetermined size.

[0030] The right end of the catheter 9 is fixedly connected to a balloon 8 with an inner cavity communicating therewith. During use, the expansion and compression of the balloon 8 is controlled by a pressure pump. After the stent 7 is delivered to the affected area, the balloon 8 is first expanded to gradually support the patient's urethral wall, and then the stent 7 is expanded to relieve the patient's pain. After the stent 7 is expanded and shaped, the balloon 8 is compressed to allow it to pass through the stent 7. The medical staff can then remove the device from the patient's body. The inner wall of the outer tube 1 is fixedly connected to an introduction component 10. The left end of the introduction component 10 is sleeved with a syringe 11. When the device is in use, the medium is delivered through the syringe 11.

[0031] Prostate stent delivery devices with balloons are usually used to implant memory alloy prostate stents in the prostate area to treat benign prostatic hyperplasia. During the operation, the stent is delivered to the patient's site through a delivery system, and the stent is heated with hot water through the delivery system's pipeline. Due to the characteristics of the memory alloy, the stent will expand when heated, so that the stent is fixed to the patient's site. This prostate stent delivery device with balloons belongs to the field of urological medical devices. It has the advantages of simple operation and good expansion effect. It is one of the effective tools for the clinical treatment of benign prostatic hyperplasia.

[0032] like Figure 3As shown, the rotating assembly 3 includes a rotating shaft 1 31 rotatably connected to the left end of the inner tube 2, and the right end of the rotating shaft 1 31 is fixedly connected to the rotating shaft 2 32. During clinical treatment, the stent 7, balloon 8 and other structures are delivered to the patient's body, and the rotating shaft 1 31 remains outside the patient's body to control the relative positions of the stent 7, balloon 8 and inner tube 2. When the stent 7 moves to the affected area, the rotating assembly 3 can be rotated to pop the stent 7 and balloon 8 out of the inner tube 2 to support the affected area.

[0033] like Figure 4 As shown, the sliding assembly 4 includes a connecting piece 41 fixedly connected to the right end of the second rotating shaft 32, the right end of the connecting piece 41 is fixedly connected to the third rotating shaft 42, the outer surface of the third rotating shaft 42 is fixedly connected to a sliding piece 43, the right end of the third rotating shaft 42 is fixedly connected to the guide rod 5, and the outer surface of the guide rod 5 is slidably connected to a slide seat 44;

[0034] The slide 44 is a cylinder with a hollow inner cavity and an opening on the left side. The slide 44 has two slide grooves 442 inclined from the upper left end to the lower right end. The shape of the slide groove 442 is adapted to the movement trajectory of the lower end when the slide 43 rotates. The left end of the slide 44 has two grooves 441. In actual use, the rotating component 3 is rotated to drive the rotating shaft 3 42 and the slide 43 to rotate. When the slide 43 rotates, it will push the slide 44 to move to the right, thereby driving the elastic component 6 to move to the right, and popping the bracket 7 and the balloon 8 out of the inner tube 2.

[0035] like Figure 3 As shown, the elastic component 6 includes a spring 61 sleeved on the outer surface of the guide rod 5. The right end of the spring 61 and the outer surface of the guide rod 5 are fixedly connected to a limit block 62. The limit block 62 and the balloon 8 jointly limit the position of the stent 7 to prevent the stent 7 from separating from the inner tube 2 during transportation.

[0036] like Figure 3 As shown, the introduction component 10 includes a medium ring 102 fixedly connected to the inner wall of the right end of the outer tube 1, and the left end of the medium ring 102 is fixedly connected to the catheter 2 101 whose inner cavity is communicated. The left end of the catheter 2 101 extends to the outside of the left end of the outer tube 1, and the catheter 2 101 is located between the outer tube 1 and the inner tube 2. The right end of the medium ring 102 is provided with a plurality of nozzles 103 distributed in a circular array. In actual use, the medium is injected into the catheter 2 101 through the syringe 11, and the medium flows through the medium ring 102 and is sprayed onto the bracket 7 through the nozzle 103. After being heated, the bracket 7 will harden, expand to a predetermined size, and support the patient's urethra wall.

[0037] The working principle of the present invention is as follows: first, the device is inserted into the prostate along the urethra, and after the bracket 7 is transported to the set position, the rotating component 3 is rotated. The rotating component 3 drives the rotating shaft 3 42 to slide on the slide 44. The slide 44 is pushed by the slide 43 to squeeze the spring 61 to the right. The spring 61 pushes the bracket 7 and the balloon 8 to move to the right end, leaving the inner tube 2 and entering the inner wall of the patient's prostate urethra. Then, the balloon 8 is expanded through the catheter 1 9 by the balloon expansion pressure pump. After the balloon 8 is blown up to an appropriate size, the medium is injected through the catheter 2 101 by the syringe 11. The medium flows through the medium ring 102 and is then sprayed onto the bracket 7 through the nozzle 103. The bracket 7 will expand and support the inner wall of the prostate. Then, the pressure pump is used to shrink the balloon 8 so that the balloon 8 can be pulled out of the bracket 7. Finally, the device can be taken out of the patient's body.

[0038] The above shows and describes the basic principles, main features and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The above embodiments and descriptions are merely illustrative of the principles of the present invention. Various changes and improvements may be made to the present invention without departing from the spirit and scope of the present invention. Such changes and improvements are intended to fall within the scope of the present invention. The scope of protection claimed in this invention is defined by the appended claims and their equivalents.

Claims

1. A prostate stent delivery device with a balloon, comprising an outer tube (1), characterized in that: A coaxial inner tube (2) is provided in the middle of the inner cavity of the outer tube (1); a rotating assembly (3) is rotatably connected to the inner cavity of the left end of the inner tube (2); a sliding assembly (4) is fixedly connected to the right end of the rotating assembly (3); a guide rod (5) is fixedly connected to the middle of the sliding assembly (4); an elastic assembly (6) is sleeved on the outer surface of the guide rod (5); a catheter (9) is provided in the inner cavity of the inner tube (2); the catheter (9) passes through the rotating assembly (3), the sliding assembly (4), and the elastic assembly (6) in sequence and extends to the right end of the inner tube (2); the bracket (7) is sleeved on the outer surface of the catheter (9) at the right end of the elastic assembly (6); the right end of the catheter (9) is fixedly connected to a balloon (8) whose inner cavity is communicated; an introduction assembly (10) is fixedly connected to the inner wall of the outer tube (1); a syringe (11) is sleeved on the left end of the introduction assembly (10).

2. The prostate stent delivery device with a balloon according to claim 1, characterized in that: The rotating assembly (3) comprises a rotating shaft (31) rotatably connected to the left end of the inner tube (2), and a rotating shaft (32) is fixedly connected to the right end of the rotating shaft (31).

3. The prostate stent delivery device with a balloon according to claim 2, characterized in that: The sliding assembly (4) includes a connecting piece (41) fixedly connected to the right end of the second rotating shaft (32), the right end of the connecting piece (41) is fixedly connected to the third rotating shaft (42), the outer surface of the third rotating shaft (42) is fixedly connected to a sliding piece (43), the right end of the third rotating shaft (42) is fixedly connected to a guide rod (5), and the outer surface of the guide rod (5) is slidably connected to a sliding seat (44).

4. The prostate stent delivery device with a balloon according to claim 1, characterized in that: The elastic component (6) comprises a spring (61) sleeved on the outer surface of the guide rod (5), and the right end of the spring (61) and the outer surface of the guide rod (5) are fixedly connected to a limiting block (62).

5. The prostate stent delivery device with a balloon according to claim 1, characterized in that: The introduction component (10) comprises a medium ring (102) fixedly connected to the inner wall of the right end of the outer tube (1); the left end of the medium ring (102) is fixedly connected to a second conduit (101) communicating with the inner cavity; the left end of the second conduit (101) extends to the outside of the left end of the outer tube (1); the second conduit (101) is located between the outer tube (1) and the inner tube (2); and the right end of the medium ring (102) is provided with a plurality of nozzles (103) distributed in a ring array.

6. The prostate stent delivery device with a balloon according to claim 3, characterized in that: The slide seat (44) is a cylinder with a hollow inner cavity and an opening on the left side. The slide seat (44) is provided with two slide grooves (442) inclined from the upper side of the left end to the lower side of the right end. The shape of the slide groove (442) is adapted to the moving trajectory of the lower end of the slide (43) when the slide (43) rotates. The left end of the slide seat (44) is provided with two grooves (441).

7. The prostate stent delivery device with a balloon according to claim 1, characterized in that: The outer tube (1) and the inner tube (2) are both soft structures.

8. The prostate stent delivery device with a balloon according to claim 1, characterized in that: The bracket (7) is a nickel-titanium alloy structure.

Images