Prostate stent and stent conveying device

Abstract

The invention discloses a prostate stent and a stent conveying device, and the prostate stent comprises a stent body which comprises a plurality of stent wires; the diaphragm comprises a diaphragm sleeve and a diaphragm piece, the diaphragm sleeve is arranged on the support wire in a sleeving mode, the diaphragm piece is an elastic sheet, the diaphragm piece is in a bent wave-shaped loose state, and when the support wire is formed by twisting a plurality of strands of flat wires into a twisted shape, the diaphragm material permeates into twisted grooves and gaps between wire materials on the support wire; and drug coatings are arranged on the outer surfaces of the stent body and the diaphragm. The invention further discloses a stent conveying device. Compared with the prior art, the problem that an existing traditional prostate stent is difficult to take out after an operation is solved.

Description

Technical Field

[0001] The present invention relates to the technical field of prostate stents, and in particular to a prostate stent and a stent delivery device. Background Art

[0002] Prostatic hyperplasia is a common disease among middle-aged and elderly men, especially those over 50 years old. The volume of the prostate increases with age. In children and the elderly, the volume grows faster, while in young people, the growth is relatively static. Prostatic hyperplasia squeezes the urethra due to hyperplasia, causing urination difficulties and even urethral stones, which brings a lot of pain to patients. Prostatitis is an inflammatory disease, and its symptoms include frequent urination, urgency, and dysuria.

[0003] Chinese patent CN217066702U discloses a hollow pentagonal prostate stent system. The new type consists of two parts: a stent system and a pusher. The stent system consists of a stent body, a fixed pressure rod, a connecting base and a connecting rope. The stent body is composed of several elastic metal wires intertwined to form a three-dimensional frame structure. The front of the stent body is approximately triangular, and the whole is a hollow pentagonal structure. The front part is a connecting rod, and the middle part is a stent support rod extending backward. The stent support rods are distributed at five positions: 12 o'clock, 3 o'clock, 5 o'clock, 7 o'clock, and 9 o'clock. The stent body is provided with a fixed pressure rod at 6 o'clock.

[0004] Chinese patent CN108969164B discloses a prostate stent, comprising: an elastic support member, which is driven to switch between a compressed state and an expanded state, and the elastic support member in the expanded state applies a biasing force toward the inner wall of the prostate urethra to expand the prostate urethra; an anti-slip member, a first end of which is connected to the elastic support member and a second end is retractably supported on the inner wall of the prostate urethra, and the second end squeezes the inner wall of the prostate urethra to cause elastic deformation to prevent the elastic support member from slipping out from the bladder.

[0005] In order to solve the problems of prostate hyperplasia and prostate inflammation in patients, prostate stent implantation has been greatly developed in my country in recent years. The prostate stent can be placed in the narrow part of the urethra through a cystoscope to expand the originally narrow and closed urethra. The stent can rupture the prostate hyperplasia part. After a period of time, the ruptured hyperplastic valves will necrotize due to ischemia. Therefore, after the prostate stent is removed, the urethra will not be squeezed again, so that most patients with dysuria can restore urination function after the placement of the urethral stent.

[0006] At present, there are many stents for treating prostate hyperplasia and prostatitis at home and abroad. The stents for treating prostate have developed very rapidly in recent years, playing a huge role in the treatment of prostate patients and greatly improving the quality of life of prostate patients. Although most stents have good therapeutic effects, they also have some shortcomings. One of the shortcomings is that the prostate hyperplasia tissue grows around the stent wire and easily surrounds the stent wire. The multiple stent wires of the traditional prostate stent are fixed together at the distal end and cannot be untied, which makes it difficult to remove the prostate stent after surgery. Removal requires strong dragging of the stent to destroy the prostate hyperplasia tissue, which can easily cause bleeding and injury to the patient during the removal process; the second shortcoming is that the production process is complicated, quality control is difficult, and the production cost is very high; the third shortcoming is that it is inconvenient for medical staff to operate, and prostate patients do not feel comfortable. The above shortcomings have become technical problems that need to be solved urgently. Summary of the invention

[0007] The purpose of the present invention is to provide a prostate stent and a stent delivery device to solve the problem that the existing traditional prostate stent is difficult to remove after surgery.

[0008] In order to achieve the above-mentioned purpose, the present invention discloses a prostate active stent, comprising: a stent body, which comprises a plurality of stent wires, an inner tube, an outer tube and a connecting wire, the inner tube and the outer tube are coaxially arranged, the connecting section of the stent wire extends into the gap between the inner tube and the outer tube, the cross-section of the connecting section of the stent wire in the inner tube and the outer tube is flat, the connecting section, the inner tube and the outer tube have an interference fit, the connecting wire passes through the gap between the inner tube and the outer tube from below and then extends out of the outer tube, the end of the connecting wire is bent to form a U-shaped head, the back of the U-shaped head contacts the stent wire, the U-shaped head is bent toward the outside of the outer tube, and an inner hole is arranged inside the inner tube.

[0009] The ends of the plurality of bracket wires are inserted into the connecting cap, and the ends of the bracket wires are inserted into the annular groove of the connecting cap. The connecting cap locks the ends of the plurality of bracket wires to prevent the plurality of bracket wires from separating.

[0010] The diaphragm includes a diaphragm sleeve and a diaphragm sheet, and the diaphragm sleeve is sleeved on the stent wire. The diaphragm is made of elastic material, and its molding process is dip coating or molding. The diaphragm sleeve tightly covers the stent wire, and the diaphragm sheet prevents the prostate tissue from proliferating and covers the stent wire. The diaphragm sheet is non-planar in design. Its design purpose is that when the stent wire is straightened, the diaphragm sheet is also passively stretched to prevent the diaphragm sheet from being torn. The diaphragm sheet is designed to be non-planar (curved and wavy) to increase the straight length of the diaphragm sheet in the stretching direction.

[0011] The circular stent wire is locally flattened at multiple locations to increase the relative sliding resistance between the stent wire and the diaphragm sleeve. The stent wire is twisted to form a twisted structure. The stent wire can be a single-strand flat wire or a plurality of flat wires. When the stent wire is a single-strand flat wire twisted into a twisted shape, the diaphragm material penetrates into the twist groove on the stent wire, increasing the relative sliding resistance between the stent wire and the diaphragm sleeve.

[0012] When the stent wire is made of multiple flat wires twisted into a twist shape, the diaphragm material penetrates into the twist grooves and gaps between the wires on the stent wire, greatly increasing the relative sliding resistance between the stent wire and the diaphragm sleeve.

[0013] A slipknot binding rope, which wraps and binds a plurality of stent wires;

[0014] Among them, the slipknot binding rope includes the distal end of the binding rope, the proximal end of the binding rope, the binding rope slipknot and the binding transition slipknot. The binding rope slipknot and the binding transition slipknot are arranged in sequence between the distal end of the binding rope and the proximal end of the binding rope. The binding rope slipknot is slipknot-wrapped around the binding section of the stent wire. The binding transition slipknot is arranged on the outside of the stent body. The binding transition slipknot itself is slipknot-wrapped independently. By dragging the proximal end of the binding rope, the binding transition slipknot and the binding rope slipknot are automatically untied. The slipknot untying process extends to the distal end of the binding rope, the slipknot binding rope is untied, and the binding sections of each stent wire are separated.

[0015] The present invention also discloses a stent delivery device, comprising: a guiding sleeve and a stent sheath, the guiding sleeve comprising a sleeve seat and a sleeve, the sleeve seat being fixedly mounted on the sleeve, the sleeve seat being used to guide the prostate stent as described above to be inserted into the sleeve, the stent sheath comprising a sheath seat and a sheath, the sheath seat being fixedly mounted at one end of the sheath.

[0016] The present invention also discloses a slipknot binding method for the prostate stent as described above, comprising the following steps:

[0017] Step 1): When the stent wire of the prostate stent is used, one opposite side of the prostate stent is recorded as side A and side B. The slipknot binding rope includes a fixed section and a non-fixed section. The fixed section is placed on the side B of the stent wire and pressed with masking glue. The length of the section is fixed in the area where the stent does not affect the weaving. The non-fixed section then goes around the back of the stent wire from left to right to complete a cross and winding to form the first loop. At this time, the fixed section is on the side B and the non-fixed section is on the side A.

[0018] Step 2): Pass your fingers through the first loop from side B to side A, pull the non-fixed section of the rope on side A into a zigzag shape and pass it back through the first loop to form the first live knot, forming a U-shaped rope loop on side B;

[0019] Step 3): Adjust the tightness of the first U-shaped rope loop, wind it 360 degrees from right to left along the radial direction of the metal wire, and move the non-fixed rope section to the B side and in front of the first U-shaped rope loop;

[0020] Step 4): Pass your fingers through the first U-shaped rope loop from the back, pull the non-fixed section of the rope into a zigzag shape and pass it back through the first U-shaped rope loop to form a second slip knot on the B side, which is recorded as the second U-shaped rope loop;

[0021] Step 5): properly adjust the tightness of the second U-shaped rope loop, wrap it 360 degrees from right to left along the radial direction of the metal wire, and then adjust the position of the non-fixed rope segment to the B side and in front of the second U-shaped rope loop;

[0022] Step 6): Put your fingers through the second U-shaped rope loop from the back, pull the non-fixed section of the rope into a zigzag shape and pass it back through the second mouth-shaped rope loop, forming the first live knot on the B side, which is recorded as the third mouth-shaped rope loop;

[0023] Step 7): Repeat the above steps 5-6 until the weaving of the metal wire segment is completed, and then proceed to step 8:

[0024] Step 8): On side B, starting from the last U-shaped rope loop at the end of the wire segment, hook the non-fixed segment of rope into a zigzag shape and pass it through the U-shaped rope loop to form a new rope loop with nothing inside, and adjust the rope loop;

[0025] Step 9): Hook the non-fixed section of the rope into a zigzag shape and pass it through the latest U-shaped rope loop and adjust it;

[0026] Step 10): Repeat step 9 to increase the number of live rope knots to obtain a continuous live lock rope.

[0027] In summary, due to the adoption of the above technical solution, the beneficial effects of the present invention are:

[0028] 1. In the present invention, since prostate hyperplasia tissue is very active and grows fast, prostate hyperplasia tissue can easily grow into the stent pores and completely cover the stent segments of the stent wire in the stent body. In the present application, the prostate stent is provided with a diaphragm on the stent wire, and a plurality of stent wires are separated by the diaphragm to prevent prostate hyperplasia tissue from covering the prostate stent wire, so as to facilitate extraction after surgery.

[0029] 2. In the present invention, since the prostate hyperplasia tissue is very active and grows fast, the prostate hyperplasia tissue can easily grow into the stent pores and completely cover the stent segments of the stent wires in the stent body. In the present application, after the operation, the prostate stent is dragged by the proximal end of the binding rope exposed outside the human body to realize the binding transition slipknot and the automatic untying of the binding rope slipknot. The untying process of the slipknot extends to the distal end of the binding rope. The slipknot binding rope is untied, and the binding segments of each stent wire are completely independent and free, so that the stent body can be easily taken out without pulling out each stent wire as a whole.

[0030] 3. In the present invention, the stent wire includes a ball head, a binding section, a stent section, and a connecting section arranged in sequence, and the ball head extends into the human body. The binding sections of each stent wire are independent, parallel, and free when not bound, and are attached together to form a whole after binding. The ball head step formed by the ball head and the binding section can prevent the binding rope from slipping when being bound, and the ball head can prevent accidental puncture of human tissue and surgical medical equipment.

[0031] 4. In the present invention, the cross-sectional shape of the binding section is non-circular, such as groove-shaped, elliptical, flat, or polygonal, etc., in order to prevent the binding section from rotating after the slipknot is bound, and to facilitate the separation and independence of the binding sections of each stent wire after the slipknot binding rope is untied.

[0032] 5. In the present invention, when the prostate stent is used, it is inserted using a stent delivery device. The guide sleeve of the stent delivery device is made of soft material and has a through hole inside. The sleeve is first inserted into the human urethra to facilitate smooth insertion of the prostate stent. The sleeve made of relatively soft material causes less damage to human tissue. In addition, a lubricating liquid can be injected through the internal channel of the sleeve to lubricate the urethra, bulbourethral gland, and prostate tissue, further facilitating smooth insertion of the stent delivery device. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required for use in the embodiments are briefly introduced below. It should be understood that the following drawings only show certain embodiments of the present invention and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other related drawings can be obtained based on these drawings without creative work.

[0034] Figure 1 This is a schematic diagram of the structure of a prostate stent scheme 1.

[0035] Figure 2 This is a schematic diagram of the structure of a stent wire scheme 1 in a prostate stent scheme 1.

[0036] Figure 3 for Figure 2 A partial enlarged view of point A in the middle.

[0037] Figure 4 This is a schematic diagram of the structure of stent wire scheme 2 in prostate stent scheme 1.

[0038] Figure 5 for Figure 4 A partial enlarged view of point B in the middle.

[0039] Figure 6 This is a schematic diagram of the structure of the diaphragm in a prostate stent scheme.

[0040] Figure 7 for Figure 6 KK section view.

[0041] Figure 8 A three-dimensional image of the diaphragm in a prostate stent scheme.

[0042] Fig. 9This is a schematic diagram of the main view angle structure of the stent body in a prostate stent scheme 1.

[0043] Fig.10 for Fig. 9 DD section view.

[0044] Fig.11 for Fig. 9 EE section view.

[0045] Fig.12 A three-dimensional view of the stent body in a prostate stent scheme 1 Figure 1 .

[0046] Fig.13 for Fig.12 A partial enlarged view of point G in the middle.

[0047] Fig.14 A three-dimensional view of the stent body in a prostate stent scheme 1 Figure 2 .

[0048] Fig.15 for Fig.14 A partial enlarged view of point H in the middle.

[0049] Fig.16 This is a schematic diagram of the structure of a second prostate stent scheme.

[0050] Fig.17 for Fig.16 A partial enlarged view of point A in the middle.

[0051] Fig.18 for Fig.16 A partial enlarged view of point B in the middle.

[0052] Fig.19 for Fig.16 A partial enlarged view of point C in the middle.

[0053] Fig. 20 This is a cross-sectional view of the stent body in a second prostate stent scheme.

[0054] Fig.21 for Fig.12 A partial enlarged view of point l in the middle.

[0055] Fig. 22 This is a schematic diagram of the end of the stent wire in a second prostate stent scheme.

[0056] Fig.23 This is a three-dimensional image of the stent wire in a second prostate stent scheme.

[0057] Fig.24 for Fig.23 A partial enlarged view of the M in the middle.

[0058] Fig.25 This is a schematic diagram of the main viewing angle structure of the stent wire in a second prostate stent scheme.

[0059] Fig.26 for Fig.25 The middle cross-section shape is the JJ section view of the groove-shaped bundling section.

[0060] Fig. 27 for Fig.25 The middle cross-section is a JJ section view of a flat bundling section.

[0061] Fig.28 This is a parallel schematic diagram before bundling of a bundling section with a groove-shaped cross-section in scheme 2 of a prostate stent.

[0062] Fig.29 This is a schematic diagram of the main viewing angle structure of the stent wire scheme 2 in the prostate stent scheme 2.

[0063] Fig.30 The figure is a schematic diagram of the structure of a stent delivery device.

[0064] Fig.31 A cross-sectional view of a stent delivery device.

[0065] Fig.32 A cross-sectional view of a guide sleeve in a stent delivery device.

[0066] Fig.33 The present invention is a cross-sectional view of a stent sheath in a stent delivery device.

[0067] Fig.34 A schematic diagram of a slipknot binding method Figure 1 .

[0068] Fig.35 A schematic diagram of a slipknot binding method Figure 2 .

[0069] Fig.36 A schematic diagram of a slipknot binding method Figure 3 .

[0070] Fig.37 A schematic diagram of a slipknot binding method Figure 4 .

[0071] Fig.38 A schematic diagram of a slipknot binding method Figure 5 .

[0072] Fig.39 A schematic diagram of a slipknot binding method Figure 6 .

[0073] Fig.40 A schematic diagram of a slipknot binding method Figure 7.

[0074] Fig.41 A schematic diagram of a slipknot binding method Figure 8 .

[0075] Fig.42 for Fig.41 A local enlarged view of point N in the middle.

[0076] Fig.43 A schematic diagram of the use of a prostate stent.

[0077] Legend:

[0078] 10. prostate stent; 11. stent body; 81. outer sleeve; 82. inner tube; 83. connecting wire; 111. U-shaped head; 84. inner hole; 150. stent wire; 151. ball head; 152. binding section; 1521. bent protrusion; 153. stent section; 154. connecting section; 12. slipknot binding rope; 21. distal end of binding rope; 211. fixed section; 41. proximal end of binding rope; 22. binding rope slipknot; 31. binding transition slipknot; 311. non-fixed section; 321. guide sleeve; 322. stent sheath; 341. sleeve seat; 342. sleeve; 351. sheath seat; 352. sheath; 361. bladder; 362. prostate tissue; 363. bulbourethral gland; 364. urethra;

[0079] 12a, diaphragm; 121a, diaphragm sleeve; 122a, diaphragm sheet; 151a, twist groove; 152a, gap. DETAILED DESCRIPTION

[0080] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Generally, the components of the embodiments of the present invention described and shown in the drawings here can be arranged and designed in various different configurations.

[0081] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the invention claimed for protection, but merely represents selected embodiments of the present invention. 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.

[0082] Example 1

[0083] See also Figure 1-15 The present invention provides a prostate stent, comprising:

[0084] The stent body 11 includes a plurality of stent wires 150, an inner tube 82, an outer tube 81 and a connecting wire 83. The inner tube 82 and the outer tube 81 are coaxially arranged. The connecting section 154 of the stent wire 150 extends into the gap between the inner tube 82 and the outer tube 81. The connecting section 154, the inner tube 82 and the outer tube 81 are interference fit. The cross section of the connecting section 154 of the stent wire in the inner tube 82 and the outer tube 81 is flat. The connecting wire 83 passes through the gap between the inner tube 82 and the outer tube 81 from the bottom and then extends out of the outer tube 81. The end of the connecting wire 83 forms a U-shaped head 111. The back of the U-shaped head 111 contacts the stent wire 150. The U-shaped head 111 is bent toward the outside of the outer tube 81. An inner hole 84 is provided inside the inner tube 82. The binding transition slipknot passes through the inner hole 84. Fig.11 , the ends of the plurality of stent wires 150 are inserted into the connection cap, the ends of the stent wires 150 are inserted into the annular groove in the connection cap, and the connection cap locks the ends of the plurality of stent wires 150 to prevent the plurality of stent wires 150 from separating;

[0085] The diaphragm 12 a includes a diaphragm sleeve 121 a and a diaphragm sheet 122 a . The diaphragm sleeve 121 a is sleeved on the stent wire 150 .

[0086] Since prostate hyperplasia tissue is very active and grows fast, prostate hyperplasia tissue can easily grow into the stent pores and completely cover the stent segments of the stent wires in the stent body. In the present application, the prostate stent is provided with a diaphragm 12a on the stent wire 150, and the diaphragm 122a is used to separate multiple stent wires 150, so as to prevent prostate hyperplasia tissue from covering the prostate stent, and facilitate extraction after surgery.

[0087] The diaphragm 12a is made of elastic material, and its molding process is dip coating or molding. The diaphragm sleeve 121a tightly covers the stent wire 150, and the diaphragm sheet 122a prevents the prostate tissue from proliferating and covers the stent wire. The diaphragm sheet 122a is non-planar in design, and its design purpose is that when the stent wire 150 is straightened, the diaphragm sheet 122a is also passively stretched to prevent the diaphragm sheet 122a from being torn. The diaphragm sheet is designed to be non-planar (curved and wavy) to increase the straight length of the diaphragm sheet in the stretching direction.

[0088] The surface of the diaphragm is provided with a drug coating. By coating the surface with antibacterial, anti-adhesion and anti-prostatic hyperplasia drug coatings, the therapeutic effect of the prostate stent and the safety during the treatment process are improved.

[0089] In order to improve the assembly effect of the stent wire 150 and the diaphragm 12a, the circular stent wire is locally flattened at multiple locations to increase the relative sliding resistance between the stent wire 150 and the diaphragm sleeve 121a.

[0090] The stent wire 150 is a single flat wire, multiple special-shaped wires (ie, partially flattened round stent wires) or multiple round wires, and the stent wires are twisted to form a braided structure.

[0091] The stent wire 150 can be a single-strand flat wire or a plurality of flat wires. When the stent wire 150 is a single-strand flat wire twisted into a twisted shape, the diaphragm 12a material penetrates into the twisted groove 151a on the stent wire 150, increasing the relative sliding resistance between the stent wire 150 and the diaphragm sleeve 121a.

[0092] When the stent wire 150 is made of multiple flat wires twisted into a twist shape, the diaphragm 12a material penetrates into the twist grooves 151a and gaps 152a between the wires on the stent wire 150, greatly increasing the relative sliding resistance between the stent wire 150 and the diaphragm sleeve 121a.

[0093] Example 2

[0094] See also Figure 16-29 and Fig.43 The present invention provides a prostate stent, comprising:

[0095] The stent body 11 includes a plurality of stent wires 150, an inner tube 82, an outer tube 81 and a connecting wire 83. The inner tube 82 and the outer tube 81 are coaxially arranged. The connecting section 154 of the stent wire 150 extends into the gap between the inner tube 82 and the outer tube 81. The connecting section 154, the inner tube 82 and the outer tube 81 are interference fit. The connecting wire 83 passes through the gap between the inner tube 82 and the outer tube 81 from below and then extends out of the outer tube 81. The end of the connecting wire 83 forms a U-shaped head 111. The back of the U-shaped head 111 contacts the stent wire 150. The U-shaped head 111 is bent toward the outside of the outer tube 81. An inner hole 84 is provided inside the inner tube 82. The binding transition slipknot passes through the inner hole 84.

[0096] A slipknot binding rope 12, which is used to wrap and bind a plurality of stent wires 150;

[0097] Among them, the slipknot binding rope 12 includes a binding rope distal end 21, a binding rope proximal end 41, a binding rope slipknot 22 and a binding transition slipknot 31. The binding rope slipknot 22 and the binding transition slipknot 31 are arranged in sequence between the binding rope distal end 21 and the binding rope proximal end 41. The binding rope slipknot 22 is slipknot-wrapped around the binding section 152 of the bracket wire 150. The binding transition slipknot 31 is arranged on the outside of the bracket body 11, and the binding transition slipknot 31 itself is independently slipknot-wrapped.

[0098] The stent body 11 is composed of a plurality of stent wires 150. The number of stent wires is set as required, and can be between 2 and 40. All drawings in this application show the stent body 11 based on three stent wires.

[0099] The stent wire 150 includes a ball head 151, a binding section 152, a stent section 153 and a connecting section 154 arranged in sequence, and the ball head 151 extends into the human body. The binding sections 152 of each stent wire 150 are independent, parallel and free when not bound, and are attached together to form a whole after being bound. The ball head step formed by the ball head 151 and the binding section 152 can prevent the slipknot binding rope 12 from slipping off when being bound, and the ball head 151 can prevent accidental puncture of human tissue and surgical medical instruments.

[0100] The bracket body 11 also includes an inner tube 82, an outer tube 81 and a connecting wire 83. The connecting section 154 of the bracket wire 150 extends into the gap between the inner tube 82 and the outer tube 81. The connecting section 154, the inner tube 82 and the outer tube 81 are interference fit. The connecting wire 83 passes through the gap between the inner tube 82 and the outer tube 81 from the bottom and then extends out of the outer tube 81. The end of the connecting wire 83 is bent to form a U-shaped head 111. The back of the U-shaped head 111 contacts the bracket wire 150. The U-shaped head 111 is bent toward the outside of the outer tube 81. An inner hole 84 is provided inside the inner tube 82, and a binding transition knot passes through the inner hole 84.

[0101] The support wire 150 is fixedly installed by the interference fit between the connecting section 154 and the inner tube 82 and the outer tube 81, while the connecting wire 83 is clearance-fitted with the connecting section 154, the inner tube 82 and the outer tube 81, and is connected by bending and deforming the U-shaped head 111 at its own end, thereby preventing the connecting wire 83 from detaching from the inner tube 82 and the outer tube 81 when being pulled out.

[0102] Working principle: because prostatic hyperplasia tissue is very active and grows fast, prostatic hyperplasia tissue is easy to grow into the support pores, and the support segment 153 of the support wire 150 in the support body 11 is completely covered. In the present application, after the operation, the prostate support is realized by dragging the near end 41 of the binding rope exposed outside the human body, so that the binding transition slipknot 31 and the binding rope slipknot 22 are automatically untied, and the slipknot untying process extends to the far end 21 of the binding rope, and the slipknot binding rope 12 is untied, and the binding segment 152 of each support wire 150 is completely independent and free, and the support body 11 can be easily taken out without pulling out each support wire 150 as a whole. The binding rope of the prostate support 10 is released, and the binding rope can be completely pulled out of the human body. Finally, the connecting wire 83 of the pulling support system is pulled, and the support system (i.e., the support body 11) is completely pulled into the support sheath tube 322, and finally the support sheath tube 322 and the support system are pulled out of the human body together, and the removal of the prostate support 10 is completed.

[0103] See also Figure 30-33The present invention provides a stent delivery device, including: a guiding sleeve 321 and a stent sheath 322, the guiding sleeve 321 includes a sleeve seat 341 and a sleeve 342, the sleeve seat 341 is fixedly installed on the sleeve 342, the sleeve seat 341 is used to guide the prostate stent 10 as mentioned above to be inserted into the sleeve 342, the stent sheath 322 includes a sheath seat 351 and a sheath 352, and the sheath seat 351 is fixedly installed at the end of the sheath 352.

[0104] When the prostate stent 10 is used, it is smoothly inserted using a stent delivery device. The sleeve 342 of the guide sleeve 321 in the stent delivery device is made of soft material and has a through hole inside. The sleeve 342 is first inserted into the human urethra 364 to facilitate smooth insertion of the prostate stent 10. The sleeve 342 made of relatively soft material causes less damage to human tissue. In addition, a lubricating liquid can be injected through the internal channel of the sleeve 342 to lubricate the urethra 364, the bulbourethral gland 363, and the prostate tissue 362, further facilitating smooth insertion of the stent delivery device.

[0105] See also Figure 34-42 The present invention also provides a slipknot binding method for a prostate stent, comprising the following steps:

[0106] Step 1): Take the three metal wires that need to be tied tightly as an example, when the stent wire 150 of the prostate stent 10, one opposite side of the prostate stent 10 is recorded as side A and side B, and the slipknot binding rope 12 includes a fixed section 211 and a non-fixed section 311, and the fixed section 211 is always above the non-fixed section 311. The fixed section 211 is placed on the B side of the stent wire 150 and pressed with masking glue to fix the partial length of the section in the area where the stent does not affect the weaving. The non-fixed section 311 then wraps around the back of the stent wire 150 from left to right, completing a cross and winding to form the first loop. At this time, the fixed section 211 is on the B side and the non-fixed section 311 is on the A side. See attached Figure 34-35 ;

[0107] Step 2): Pass your finger through the first loop from side B to side A, pull the non-fixed section 311 of side A into a zigzag shape and pass it back through the first loop to form the first live knot, which is a U-shaped loop on side B, see attached. Fig.36 ;

[0108] Step 3): Adjust the tightness of the first U-shaped rope loop, wind it 360 degrees from right to left along the radial direction of the metal wire, and move the non-fixed section 311 rope position to the B side and in front of the first U-shaped rope loop, see the attached Fig.37 ;

[0109] Step 4): Pass your fingers through the first U-shaped rope loop from the back, pull the rope of the non-fixed section 311 into a zigzag shape and pass it back through the first U-shaped rope loop to form a second slip knot on the B side, which is recorded as the second U-shaped rope loop. Fig.38;

[0110] Step 5): properly adjust the tightness of the second U-shaped rope loop, wrap it 360 degrees from right to left along the radial direction of the metal wire, and then adjust the position of the non-fixed section 311 rope to the B side and in front of the second U-shaped rope loop, see the attached Fig.39 ;

[0111] Step 6): Pass your fingers through the second U-shaped rope loop from the back, pull the non-fixed section 311 into a zigzag shape and pass it back through the second mouth-shaped rope loop to form the first live knot on the B side, which is recorded as the third mouth-shaped rope loop. Fig.40 ;

[0112] Step 7): Repeat the above steps 5-6 until the weaving of the metal wire segment is completed, and then proceed to step 8:

[0113] Step 8): On the B side, starting from the last U-shaped rope loop at the end of the metal wire segment, hook the rope of the non-fixed segment 311 into a zigzag shape and pass it through the U-shaped rope loop to form a new rope loop with nothing inside, and adjust the rope loop to a suitable size;

[0114] Step 9): Hook the rope of the non-fixed section 311 into a zigzag shape and pass it through the latest U-shaped rope loop, and adjust it to a suitable size;

[0115] Step 10): Repeat step 9 to increase the number of live rope knots to obtain a continuous live rope of appropriate length. Figure 40-42 .

[0116] By using the slipknot binding method, the binding sections 152 of the stent wires 150 in the stent body 11 are bound together by the slipknot binding rope 12, so as to facilitate the delivery of the prostate stent into the human body.

[0117] The proximal end 41 of the slipknot binding rope 12 is located outside the human body. After the prostate stent surgery, the binding transition slipknot 31 and the binding rope slipknot 22 are automatically untied by dragging the proximal end 41 of the binding rope exposed outside the human body. The slipknot untying process extends to the distal end 21 of the binding rope. The slipknot binding rope 12 is untied, and the binding sections 152 of each stent wire 150 are completely independent and free, so the stent body 11 can be easily taken out without pulling out each stent wire 150 as a whole.

[0118] Under normal conditions, the stent wire 150 is made of nickel-titanium material or stainless steel material. The stent wire material is an elastic alloy material, specifically nickel-titanium material or stainless steel material, etc. The noose knot binding rope is a non-degradable material and will not degrade in the human body, so that the noose knot binding rope can be untied smoothly.

[0119] In addition, in order to ensure that the binding segments 152 of each stent wire 150 are completely independent and free when the stent body 11 is removed, the slipknot binding rope can also be made of a degradable material, and a dead knot is provided between the binding rope slipknot and the binding transition slipknot, which can also achieve the above effect.

[0120] Specifically, since the slipknot binding rope is made of degradable material, it can be degraded in the human body. During the treatment process, as the slipknot binding rope stays in the human body for a longer time, the slipknot binding rope itself degrades and breaks, and no longer binds and fixes the binding segments 152 of each stent wire 150. The binding segments 152 of each stent wire 150 are completely independent and free, and are easy to remove. After the binding rope is degraded, it is finally completely absorbed by the prostate tissue.

[0121] Therefore, when the slipknot binding rope is made of degradable material, there is no need to set a binding transition slipknot outside the binding section 152 of the stent wire 150. At the end of the slipknot binding of the binding section 152, a dead knot can be tied, and even a dead knot can be directly tied at the binding section 152 to lock the binding section.

[0122] The dead knot of the slipknot binding rope can be a single knot, multiple single knots, flat knot and other methods.

[0123] Embodiment 3:

[0124] This embodiment further provides the following improved technical solutions based on the above embodiments: the binding transition slipknot 31 on the prostate stent 10 is in a free state and is separated from the stent body 11, lacking fixation. Since the prostate hyperplasia tissue is very active and grows fast, the prostate hyperplasia tissue can easily grow into the stent pores, and the binding transition slipknot 31 can also be easily covered by the prostate hyperplasia tissue, affecting normal use.

[0125] Therefore, when the prostate stent is used, a sleeve can be put on the outside of the binding transition slipknot 31 to prevent the prostate component from growing and surrounding the binding transition slipknot 31, thereby avoiding obstruction in the untying process of the binding transition slipknot 31.

[0126] Embodiment 4:

[0127] This embodiment further provides the following improved technical solutions based on the above embodiments: Since the diameter of the stent wire 150 is limited, after the operation, there is a risk of breakage when the stent wire 150 encounters resistance during the pulling-out process, and after the breakage, the stent wire 150 remains in the human body and is difficult to remove, resulting in the risk of medical accidents.

[0128] In order to prevent the stent wire 150 from breaking, the stent wire 150 is a spiral wire body formed by twisting multiple single wires in parallel. The twisted shape of the stent wire 150 is like a steel wire rope or a twist, which improves the strength of the stent wire 150 and prevents the stent wire 150 from breaking.

[0129] Embodiment 5:

[0130] See also Figure 25 to Figure 28 , the figure shows a prostate stent provided by Example 4 of the present invention. This embodiment further makes the following improved technical solutions on the basis of the above embodiments: the cross-section of the binding section 152 is groove-shaped, elliptical, flat or polygonal.

[0131] The cross-sectional shape of the binding section 152 is non-circular, such as grooved, elliptical, flat or polygonal, etc., in order to prevent the binding section from rotating after the slipknot is bound, and to facilitate the separation and independence of the binding sections 152 of each stent wire 150 after the slipknot binding rope 12 is untied.

[0132] The cross-sectional shape of the binding section 152 is preferably a groove shape. The angle W of the groove structure is determined according to the number N of stent wires 150 included in the stent body 11.

[0133] The calculation formula is: Angle W = 360 / N.

[0134] Embodiment 6:

[0135] See also Figure 25 to Figure 28 , the figure shows a prostate stent provided by Example 5 of the present invention. This embodiment further makes the following improved technical solutions based on the above embodiments: different parts of the stent wire 150 can be set with different cross-sectional shapes according to needs. For example, the binding section 152 and the stent section 153 are processed to form different cross-sectional shapes. For example, the cross section of the stent section 153 is circular, grooved, elliptical, flat or polygonal.

[0136] Different from the binding section 152 , the cross section of the bracket section 153 may be circular, groove-shaped, elliptical, flat, polygonal, etc.

[0137] Example 7

[0138] See also Fig.29 , the figure shows a prostate stent provided by Example 6 of the present invention. This embodiment further makes the following improved technical solutions on the basis of the above embodiments: a bending protrusion 1521 is provided on the binding section 152.

[0139] When the stent body 11 is used, the binding segments 152 of the stent wires 150 in the stent body 11 are bound together by the slipknot binding rope 12, so as to facilitate the delivery of the prostate stent into the human body. The binding rope slipknot 22 and the binding segment 152 on the slipknot binding rope 12 slide relative to each other, affecting the binding effect, and causing the multiple stent wires 150 of the stent body 11 to not fit together and to have gaps.

[0140] By providing the bent protrusion 1521 on the binding section 152, the binding rope slipknot 22 and the binding section 152 are effectively prevented from sliding relative to each other, thereby ensuring the binding effect.

[0141] Example 8

[0142] This embodiment further provides the following improved technical solutions based on the above embodiments: since the stent body 11 will extend into the human body and stay in the human body for a period of time, in order to further improve the therapeutic effect of the prostate stent 10, a drug coating is provided on the outer surface of the stent body 11 on the basis of giving full play to the physical structure therapeutic function of the prostate stent 10 based on the shape.

[0143] The surface of the stent body 11 is coated with antibacterial, anti-adhesion and anti-prostatic hyperplasia drug coatings, and the drugs are used to improve the therapeutic effect of the prostate stent and the safety during the treatment process.

[0144] The treatment process of prostate stent is as follows:

[0145] S1. Stent delivery device inserted into urethra 364, bulbourethral gland 363, prostate tissue 362, bladder 361

[0146] S2, removing the guide sleeve 321 of the stent delivery device;

[0147] S3, sending the slipknot-bound prostate stent 10 into the inner cavity of the stent sheath 322;

[0148] S4, sending the stent part of the prostate stent 10 with a slipknot into the bladder 361;

[0149] S5, removing the stent sheath 322 of the stent delivery device;

[0150] S6, pulling the stent part of the slipknot binding prostate stent 10 into the prostate position, so that the stent part of the slipknot binding prostate stent 10 plays a role in treating the prostate;

[0151] S7, inserting the stent sheath 322 into the urethra 364 to the bulbourethral gland 363;

[0152] S8, untie the binding rope of the prostate stent 10 with a slipknot, and completely pull the binding rope out of the human body, so that the binding sections of the multiple stent wires are completely independent and free, pull the connecting wire 83 of the stent system, and completely pull the stent system into the stent sheath 322, and finally pull the stent sheath 322 and the stent system out of the human body together;

[0153] S9. Complete treatment.

[0154] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes according to the technical scheme and inventive concept of the present invention within the technical scope disclosed by the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A prostate stent, characterized in that: include: The stent body comprises a plurality of stent wires, an inner tube, an outer tube and a connecting wire, wherein the inner tube and the outer tube are coaxially arranged, the connecting section of the stent wire extends into the gap between the inner tube and the outer tube, the connecting section, the inner tube and the outer tube are interference fit, the connecting wire passes through the gap between the inner tube and the outer tube from below and then extends out of the outer tube, the end of the connecting wire is bent to form a U-shaped head, the back of the U-shaped head contacts the stent wire, the U-shaped head is bent toward the outside of the outer tube, and an inner hole is arranged inside the inner tube; The diaphragm comprises a diaphragm sleeve and a diaphragm sheet, wherein the diaphragm sleeve is sleeved on the stent wire, the diaphragm sheet is an elastic sheet, and the diaphragm sheet is in a relaxed state in a curved wavy shape. The diaphragm sheet in a relaxed state in a curved wavy shape on the stent wire increases the straight length of the diaphragm sheet when it is stretched along the length direction of the stent body, and a drug coating is arranged on the surface of the diaphragm.

2. A prostate stent according to claim 1, characterized in that: The stent wire is a single flat wire, multiple special-shaped wires or multiple round wires. The stent wire is twisted to form a braided structure. The braided structure increases the relative sliding resistance of the stent wire in cooperation with the diaphragm sleeve.

3. A prostate stent, characterized in that: include: A slipknot binding rope, which is used to wrap and bind a plurality of the stent wires; Among them, the slipknot binding rope includes the distal end of the binding rope, the proximal end of the binding rope, the binding rope slipknot and the binding transition slipknot. The binding rope slipknot and the binding transition slipknot are sequentially arranged between the distal end of the binding rope and the proximal end of the binding rope. The binding rope slipknot is slipknot-wrapped around the binding segment of the stent wire. The binding transition slipknot is arranged on the outside of the stent body. The binding transition slipknot itself is independently slipknot-wrapped. By dragging the proximal end of the binding rope, the binding transition slipknot and the binding rope slipknot are automatically untied. The slipknot untying process extends to the distal end of the binding rope, the slipknot binding rope is untied, and the binding segments of each stent wire are separated. The binding segments of each stent wire are completely independent and free.

4. A prostate stent according to claim 3, characterized in that: The stent wire comprises a ball head, a binding section, a stent section and a connecting section which are arranged in sequence, and the ball head extends into the human body.

5. A prostate stent according to claim 4, characterized in that: The stent wire is made of nickel-titanium material or stainless steel material, and the slipknot binding rope is made of non-degradable material.

6. A prostate stent according to claim 4, characterized in that: The slipknot binding rope is made of degradable material, and a dead knot is arranged between the binding rope slipknot and the binding transition slipknot.

7. A prostate stent according to claim 4, characterized in that: The stent wire is a spiral wire body formed by twisting a plurality of single wire materials in parallel.

8. A prostate stent according to claim 4, characterized in that: The binding section is provided with a bent protrusion.

9. A prostate stent according to claim 3, characterized in that: The outer surface of the stent body is provided with a drug coating.

10. A stent delivery device, characterized in that: It includes: a guiding sleeve and a stent sheath, the guiding sleeve includes a sleeve seat and a sleeve, the sleeve seat is fixedly mounted on the sleeve, the sleeve seat is used to guide the prostate stent as described in any one of claims 1-9 to be inserted into the sleeve, the stent sheath includes a sheath seat and a sheath, the sheath seat is fixedly mounted on the end of the sheath.

Images