Prostate anastomosis traction fixing device and use method

Abstract

The invention relates to the field of medical instruments, in particular to a prostate anastomosis traction fixing device and a using method.The prostate anastomosis traction fixing device comprises an operation tube and a balloon arranged on the outer side wall of the first end of the operation tube; the balloon is arranged on the operating tube, the anastomosis mechanism is arranged on the operating tube and close to the balloon, the air tube is connected to the side wall of the second end of the operating tube and used for inflating and deflating the balloon, the anastomosis mechanism comprises an anastomosis needle and a control mechanism, and the anastomosis needle is used for puncturing out of the operating tube and puncturing into prostate tissue under the control of the control mechanism. Along with pulling of the operation tube, anastomosis and fixation of the cut prostate are achieved, and after anastomosis, under control of the control mechanism, the anastomosis needle is separated from prostate tissue and returns to the operation tube. The problems that after radical prostate resection, the bladder neck and the urethral stump are difficult to fit in a narrow pelvic cavity space, and an active involution traction means is lacked are effectively solved.

Description

Technical Field

[0001] This invention relates to the field of medical devices, specifically to a prostate anastomosis traction fixation device and its usage method. Background Technology

[0002] After radical prostatectomy, precise anastomosis of the bladder neck and urethral stump is essential to reconstruct the urinary tract. However, this anastomosis site is located deep within the male pelvis, surrounded by the pubis, neurovascular bundles, and rectum, leaving only about 2-3 cm of operating space. Direct visualization is difficult to achieve under laparoscopy or open surgery. Traditional methods rely on the surgeon manually suturing 6-8 stitches with a curved needle within the narrow space. The stitch spacing and edge distance are entirely controlled by experience, which easily leads to excessively deep sutures that damage the urinary control nerves due to angle limitations, or insufficient sutures that cause anastomotic tearing. Furthermore, the bladder neck and urethral stump retract after transection, and the lack of effective traction methods often results in tissue misalignment and uneven tension, leading to postoperative anastomotic leakage, stenosis, and chronic urinary incontinence. The utility model patent with publication number CN219323772U only achieves passive traction through external fixation of the catheter, failing to actively pull the severed ends together or perform mechanical anastomosis, thus still failing to overcome the problem of inaccurate anastomosis caused by the limited space. Summary of the Invention

[0003] The purpose of this invention is to provide a prostate anastomosis traction fixation device and its usage method to solve the problems of limited operating space and inaccurate anastomosis during deep anastomosis of the bladder neck and urethral stump.

[0004] To achieve the above objectives, the following technical solution is adopted.

[0005] A prostate anastomosis traction fixation device includes an operating tube, a balloon disposed on the outer wall of a first end of the operating tube, an anastomosis mechanism disposed on the operating tube near the balloon, and a trachea connected to the outer wall of a second end of the operating tube for inflating or deflating the balloon. The anastomosis mechanism includes an anastomosis needle and a control mechanism. The anastomosis needle, under the control of the control mechanism, pierces the operating tube and inserts into the prostate tissue. With the pulling of the operating tube, the resected prostate is anastomosed and fixed. After anastomosis, under the control of the control mechanism, the anastomosis needle can detach from the prostate tissue and return to the operating tube.

[0006] Optionally, the control mechanism includes a herringbone-shaped channel disposed in the side wall of the operating tube near the first end. The herringbone-shaped channel is axially arranged along the operating tube, and an anastomosis needle inlet and outlet are opened at the top of the herringbone-shaped channel corresponding to the position of the operating tube. Multiple sets of anastomosis needles are arranged side by side on one side of a slide rod. The slide rod is slidably disposed in the herringbone-shaped channel. The initial position of the slide rod is located at the end of the herringbone-shaped channel near the balloon. The needle tip of the anastomosis needle faces the second end of the operating tube. One end of the traction rope is connected to the slide rod. The other end of the traction rope passes through the traction channel opened on the side wall of the operating tube and extends to the outside of the operating tube. When the traction rope pulls the slide rod to move along the herringbone-shaped channel toward the second end of the operating tube, the slide rod moves along the first slope of the herringbone-shaped channel. The anastomosis needle gradually passes through the anastomosis needle inlet and outlet and pierces the prostate tissue. When the anastomosis needle passes the top of the herringbone-shaped channel and reaches the second slope, the anastomosis needle gradually detaches from the prostate tissue and enters the herringbone-shaped channel.

[0007] Optionally, the first slope of the herringbone channel is provided with a first limiting groove located at the lower part of the first slope and a second limiting groove located at the upper part of the first slope. The first limiting groove is used to facilitate sensing the position of the sliding rod when it enters. The second limiting groove is a U-shaped groove, and the bottom of the U-shaped groove is offset towards the first limiting groove. The second limiting groove is used to indicate that the anastomosis needle has reached the anastomosis position and to provide support force to the anastomosis needle when the sliding rod enters.

[0008] Optionally, the length of the anastomosis needle is greater than the distance from the first slope to the outside of the anastomosis needle inlet and outlet.

[0009] Optionally, the second end of the operating tube is also connected to a flushing tube, and the first end of the operating tube is provided with a guide head, which is provided with a flushing port and a catheterization hole. The flushing channel of the flushing tube and the air passage of the air tube converge at the side wall of the operating tube, and a guide channel is opened in the operating tube; the flushing port is connected to the flushing channel; the air passage is connected to the balloon; and the guide channel is connected to the catheterization hole.

[0010] Optionally, the slide bar is provided with a magnetic attraction part, which is used to drive the magnetic attraction part through the magnet outside the operating tube, thereby driving the slide bar to cross the herringbone channel and reach the initial position.

[0011] Optionally, the matching mechanism has two sets symmetrically arranged in the sidewalls on the upper and lower sides of the flow channel.

[0012] A method for using a prostate anastomosis traction fixation device includes the following steps.

[0013] The first end of the operating tube is inserted through the urethra, and after the balloon enters the bladder, it is inflated through the trachea to form intracavitary anchorage.

[0014] Pull the operating tube outward so that the balloon is pressed against the bladder neck, exposing the wound after prostatectomy;

[0015] The traction rope drives the slide bar to move along the first slope of the herringbone channel to the second end of the operating tube, so that the anastomosis needle can be inserted into the lateral tissue of the prostate through the anastomosis needle inlet and outlet.

[0016] Continue to pull the traction rope until the slide bar slides into the second limiting groove of the herringbone channel, locking the anastomosis needle in the insertion position, and stop the traction rope operation;

[0017] The traction tube is used to tightly align the severed ends of the prostate gland.

[0018] After the tissue alignment and processing are completed, the traction rope is pulled to move the slide bar past the apex of the herringbone channel and along the second slope of the herringbone channel. The anastomosis needle is withdrawn from the tissue and retracted into the operating tube.

[0019] Remove the device after deflating the balloon.

[0020] Optionally, when the slide bar moves to the first limiting groove, tactile feedback is generated to indicate that the anastomosis needle has begun to penetrate the tissue; when the slide bar enters the second limiting groove, secondary tactile feedback is generated to confirm that the anastomosis needle has reached the preset depth and is locked in position.

[0021] Optionally, after the anastomosis needle is withdrawn from the operating tube, flushing fluid is injected into the operating tube through the flushing tube. The flushing fluid flows out through the flushing port of the guide head to flush the bladder, while urine is guided into the drainage channel through the catheter hole for discharge.

[0022] Compared with the prior art, the present invention has the following beneficial effects:

[0023] The prostate anastomosis traction fixation device of this application effectively solves the problems of difficult operation and lack of active traction means in the narrow pelvic space after radical prostatectomy anastomosis between the bladder neck and urethral stump. Specifically, in the device, the operating tube serves as the main support structure. The balloon on the outer wall of its first end can be inflated through the trachea to form an intracavitary anchorage, providing a stable fulcrum for subsequent operations and avoiding operational deviations caused by instrument displacement during traditional manual suturing. The anastomosis mechanism located near the balloon achieves controllable insertion and retraction of the anastomosis needle through a control mechanism. In the narrow operating space of only 2-3 cm, the surgeon does not need to rely on experience for blind suturing. Instead, mechanical control allows the anastomosis needle to penetrate the prostate tissue, and the traction of the operating tube achieves active closure and tight alignment between the bladder neck and urethral stump. This fundamentally overcomes the risk of damage to the urinary control nerve due to excessive depth or anastomotic tearing due to insufficient depth caused by the limited angle of manual suturing. At the same time, it solves the defect of traditional passive traction that cannot actively adjust the tissue position, ensuring precise alignment of the severed ends.

[0024] Furthermore, the herringbone-shaped channel and sliding rod structure allow the anastomosis needle to move along a preset trajectory: when the traction rope pulls the sliding rod along the first slope, the anastomosis needle is smoothly inserted; when it moves past the top along the second slope, the anastomosis needle retracts in an orderly manner. The entire process is highly controllable, adaptable to delicate operations in confined spaces, and avoids tissue damage caused by deviations in the operating angle. The first limiting groove and the U-shaped second limiting groove with an offset bottom can accurately indicate the surgeon's progress in needle insertion through tactile feedback when the sliding rod enters. That is, the first limiting groove provides feedback on the start of insertion, while the second limiting groove provides stable support for the sliding rod through structural design, ensuring that the anastomosis needle is locked in the anastomosis position, avoiding positional displacement caused by intraoperative vibration or traction, and ensuring uniform anastomosis depth. The length of the anastomosis needle is greater than the distance from the first slope to the outside of the inlet and outlet to ensure anastomosis. The needle can effectively penetrate the target tissue for reliable alignment. The integrated flushing tube, guide head, and corresponding channels allow for direct flushing of the bladder and drainage of urine through the catheter port after the anastomosis procedure, eliminating the need for additional instrument replacements. This reduces the number of steps required in confined spaces and lowers the risk of secondary tissue damage. The magnetic suction design allows the slide bar to be driven and reset via an external magnet, simplifying postoperative device reset and improving ease of use. Two symmetrical anastomosis mechanisms apply balanced tension to the tissue from both sides of the guide channel, preventing tissue misalignment or uneven tension caused by unilateral force and further ensuring the stability of the anastomosis. The usage method is closely compatible with the device structure. Through standardized anchoring, traction, anastomosis, and reset steps, each function is ensured to operate in an orderly manner, ultimately reducing the occurrence of postoperative complications such as anastomotic leakage, stenosis, and urinary incontinence. Attached Figure Description

[0025] Figure 1 This is a schematic diagram of the overall structure of an embodiment of the prostate anastomosis traction fixation device of the present invention.

[0026] Figure 2 This is a schematic diagram of the first end of the operation tube in an embodiment of the prostate anastomosis traction fixation device of the present invention.

[0027] Figure 3 This is a schematic diagram of the second end of the operating tube in an embodiment of the prostate anastomosis traction fixation device of the present invention.

[0028] Figure 4 This is a schematic diagram of the middle cross section of the operating tube in an embodiment of the prostate anastomosis traction fixation device of the present invention.

[0029] Figure 5 This is a schematic diagram of the first slope traction section of the anastomosis mechanism in an embodiment of the prostate anastomosis traction fixation device of the present invention.

[0030] Figure 6This is a schematic diagram of the second slope traction section of the anastomosis mechanism in an embodiment of the prostate anastomosis traction fixation device of the present invention.

[0031] The components include: 1. Operating tube; 2. Trachea; 3. Flushing tube; 4. Balloon; 5. Guide head; 6. Flushing hole; 7. Catheter hole; 8. Flushing channel; 9. Airway; 10. Guide channel; 11. Herringbone channel; 111. First slope; 112. Second slope; 113. First limiting groove; 114. Second limiting groove; 12. Traction channel; 13. Traction rope; 14. Sliding rod; 15. Anastomosis needle; 16. Anastomosis needle inlet and outlet. Detailed Implementation

[0032] The present invention will now be described in detail with reference to the accompanying drawings and embodiments. It should be noted that, unless otherwise specified, the embodiments and features described in this application can be combined with each other.

[0033] The following detailed description is exemplary and intended to provide further detailed explanation of the invention. Unless otherwise specified, all technical terms used in this invention have the same meaning as commonly understood by one of ordinary skill in the art to which this application pertains. The terminology used in this invention is for the purpose of describing particular embodiments only and is not intended to limit the scope of exemplary embodiments according to the invention.

[0034] Example 1

[0035] like Figures 1-6 As shown, a prostate anastomosis traction fixation device specifically includes:

[0036] Operating tube 1: As the main load-bearing structure of the entire device, operating tube 1 can be made of medical-grade flexible polymer materials, such as polyetheretherketone (PEEK) or polyurethane. These materials possess good biocompatibility, flexibility, and sufficient mechanical strength, ensuring that during transurethral insertion and subsequent operations, it can adapt to the physiological curvature of the urethra, avoiding damage to the urethral mucosa, while also withstanding certain tensile and torsional forces. The outer diameter of operating tube 1 is designed to be 8-12 Fr, which can be selected according to the urethral anatomy of different patients. The inner diameter must meet the installation and operation space requirements of internal components (such as anastomosis needle 15, slide bar 14, trachea 2, flushing tube 3, etc.). Its length is usually 30-40cm, sufficient to smoothly reach the bladder from the external urethral orifice, and to allow for effective operations within the bladder and at the prostatectomy site.

[0037] Balloon 4: Balloon 4 is installed on the outer wall of the first end of the operating tube 1. It can be made of highly elastic, thin, and tough silicone material. This material can rapidly expand after inflation to form a stable intracavitary anchoring structure, and can quickly retract after deflation, facilitating device removal. The initial state of balloon 4 is flattened and adheres to the outer wall of the operating tube 1 to reduce resistance during passage through the urethra. When sterile saline or gas is injected into balloon 4 through the trachea 2, balloon 4 can inflate to an approximately spherical shape with a diameter of 2-3 cm. This size ensures sufficient anchoring support within the bladder to prevent device displacement without causing excessive pressure on the bladder mucosa. The shape of balloon 4 is designed so that one end is tightly connected to the operating tube 1, while the other end has a rounded arc surface to better adapt to the spatial structure within the bladder and avoid localized stress concentration that could lead to bladder injury.

[0038] The matching mechanism specifically includes:

[0039] Anastomosis needle 15: Anastomosis needle 15 can be made of medical-grade stainless steel or titanium alloy. These materials have good rigidity and toughness, ensuring that they are not easily bent or broken when inserted into prostate tissue, while also possessing a certain degree of corrosion resistance to prevent rusting in the body environment. Multiple sets of anastomosis needles 15 are arranged side-by-side on one side of the slide bar 14, with each set containing 2-3 needles 15. The spacing between adjacent anastomosis needles 15 is 2-3 mm to ensure evenly distributed anastomosis points on the prostate tissue, achieving a good alignment effect. The needle tip of the anastomosis needle 15 undergoes special grinding treatment, forming a sharp triangular pyramid shape, which effectively reduces resistance when inserting into the tissue and ensures the accuracy of the puncture path. According to claim 4, the length of the anastomosis needle 15 is precisely designed to be greater than the distance from the first slope 111 of the herringbone channel 11 to the outside of the anastomosis needle inlet and outlet 16, specifically 8-10 mm, to ensure that when the slide bar 14 moves along the first slope 111 of the herringbone channel 11, the anastomosis needle 15 can fully pierce the operating tube 1 and penetrate into the prostate tissue 3-5 mm, thereby achieving reliable tissue fixation and anastomosis.

[0040] Control Mechanism: The core of the control mechanism is the herringbone channel 11, which is located in the side wall of the operating tube 1 near the first end and distributed along the axial direction of the operating tube 1. The herringbone channel 11 can be formed in the side wall of the operating tube 1 using precision machining technology, and the surface of the channel is polished to reduce the friction when the slide rod 14 slides within it. The top of the herringbone channel 11 has an anastomosis needle inlet and outlet 16 corresponding to the position of the operating tube 1. The shape of the inlet and outlet matches the cross-sectional shape of the anastomosis needle 15, which is a circle or ellipse with a diameter slightly larger than that of the anastomosis needle 15, ensuring smooth and unobstructed entry and exit of the anastomosis needle 15 and effectively preventing tissue from embedding in the channel. The slide rod 14 is slidably disposed in the herringbone channel 11, and its material is the same as that of the operating tube 1 to ensure good compatibility and mechanical performance. The initial position of the slide rod 14 is located at the end of the herringbone channel 11 near the balloon 4. In this position, the tip of the anastomosis needle 15 faces the second end of the operating tube 1 and is completely contained within the operating tube 1. One end of a traction rope 13 is connected to the slide rod 14. The traction rope 13 can be made of high-strength, fine-diameter medical silk or nylon thread with a diameter of 0.2-0.3 mm. It can withstand sufficient tension to drive the slide rod 14 to move, and can also slide smoothly within the traction channel 12 opened on the side wall of the operating tube 1, reducing frictional resistance. The other end of the traction rope 13 passes through the traction channel 12 opened on the side wall of the operating tube 1 and extends to the outside of the operating tube 1. The operator can precisely control the movement of the slide rod 14 by pulling the traction rope 13 from outside the body.

[0041] Tracheal tube 2: Tracheal tube 2 is connected to the second end side wall of the operating tube 1 and is used for inflating and deflating the balloon 4. Tracheal tube 2 can be made of soft, flexible medical-grade silicone tubing with an inner diameter of 1-2 mm. This ensures sufficient gas flow, allowing the balloon 4 to inflate or deflate rapidly in a short time, while also allowing for flexible bending during operation to adapt to the needs of the surgical operating space. One end of tracheal tube 2 is tightly connected to the inside of the balloon 4 through a sealing joint to ensure no gas leakage during inflation; the other end extends outside the operating tube 1 and is equipped with a small inflation valve and pressure gauge combination device. The inflation valve can be a one-way valve structure to prevent gas backflow during inflation and ensure a stable pressure rise inside the balloon 4; the pressure gauge is used to monitor the pressure value inside the balloon 4 in real time, allowing the surgeon to accurately control the inflation degree of the balloon 4 and avoid damage to the bladder due to excessive pressure or poor anchoring effect due to insufficient pressure.

[0042] The herringbone channel 11 has a first limiting groove 113 and a second limiting groove 114 on its first slope 111. The first limiting groove 113 is located at the lower part of the first slope 111 and is a shallow and narrow groove with a depth of 0.5-1mm and a width slightly larger than the diameter of the slide rod 14. When the slide rod 14 enters the first limiting groove 113, the slight obstruction and guidance of the groove on the movement trajectory of the slide rod 14 allows the surgeon to sense the position of the slide rod 14 through the tactile changes transmitted by the traction rope 13, thus indicating that the anastomosis needle 15 should begin to pierce the tissue. The second limiting groove 114 is located at the upper part of the first slope 111 and is a U-shaped groove structure. The bottom of the U-shaped groove is offset towards the first limiting groove 113 by a distance of 1-2mm. The depth of the U-shaped groove is 1-1.5mm, and its width is slightly larger than the diameter of the slide bar 14. When the slide bar 14 enters the second limiting groove 114, the anastomosis needle 15 reaches the anastomosis position. The special structure of the U-shaped groove can provide stable support for the slide bar 14, ensuring that the anastomosis needle 15 remains fixed in this position and avoids displacement of the anastomosis needle 15 due to intraoperative vibration or tissue traction. At this time, anastomosis can be performed by traction operation tube 1. The special structure of the U-shaped groove can also facilitate the traction of the slide bar 14 from the second limiting groove 114. At the same time, due to the offset design at the bottom of the U-shaped groove, when the slide bar 14 enters, it will produce a different tactile feedback than when it enters the first limiting groove 113, so that the surgeon can clearly confirm that the anastomosis needle 15 has reached the preset depth and locked the position.

[0043] Flushing tube 3 and guide head 5: The second end of the operating tube 1 is also connected to a flushing tube 3. The flushing tube 3 can be made of medical-grade silicone tubing with an inner diameter of 2-3 mm to meet the water flow requirements during postoperative bladder irrigation. A guide head 5 is provided at the first end of the operating tube 1. The guide head 5 can be integrally molded and connected to the operating tube 1, using the same material as the operating tube 1. The guide head 5 is equipped with a flushing port and a urinary catheter 7. The flushing port is connected to the flushing channel 8 of the flushing tube 3. Its shape is circular or elliptical, with a diameter of 1-2 mm. Multiple flushing ports are evenly distributed on the front side of the guide head 5 to ensure that the irrigation fluid can be sprayed out at a certain angle and range, thoroughly flushing tissue debris, blood clots, etc., from the bladder. The urinary catheter 7 is located at the top of the guide head 5, with a diameter of 3-4 mm, and is used to guide urine from the bladder into the guide channel 10 in the operating tube 1. The flushing channel 8 of the flushing pipe 3 and the air passage 9 of the air pipe 2 converge on the side wall of the operating pipe 1. Inside the operating pipe 1, independent channels can be created using a precise molding process to ensure that the flushing, air inflation, and urine drainage processes do not interfere with each other. The drainage channel 10 in the operating pipe 1 adopts a hollow structure with the same material as the main body of the operating pipe 1. Its inner diameter is designed to be 5-6mm according to the needs of urine drainage, which can smoothly drain urine and avoid blockage.

[0044] Magnetic suction part of slide bar 14: A magnetic suction part is provided on slide bar 14. The magnetic suction part can be made of small neodymium iron boron magnets or other strong magnetic materials, and is fixed to the surface of slide bar 14 by embedding or bonding. When the operation is completed and slide bar 14 needs to be returned to its initial position, the surgeon can use a matching external magnet outside the operating tube 1. The magnetic attraction generated by the external magnet will drive the magnetic suction part on slide bar 14, thereby easily moving slide bar 14 over the apex of the herringbone channel 11 and returning to the initial position near balloon 4 along the second slope 112. This magnetic suction return method is simple and quick to operate, and can effectively achieve the return of slide bar 14 without adding additional complex mechanical structures, improving the ease of use and repeatability of the device.

[0045] Symmetrical arrangement of the anastomosis mechanism: According to claim 7, two sets of anastomosis mechanisms are symmetrically arranged in the side walls on the upper and lower sides of the drainage channel 10. The structures and working principles of the two sets of anastomosis mechanisms are exactly the same. In actual surgery, the two sets of anastomosis mechanisms can be used simultaneously or separately depending on the specific situation of the prostate resection wound. For example, for a large prostate resection wound, the slide rods 14 of both sets of anastomosis mechanisms can be driven simultaneously, so that the anastomosis needles 15 on both sides can be inserted into the prostate tissue at the same time, achieving a wider and more uniform tissue alignment; while for some wounds with uneven distribution or local areas that require focused reinforcement of anastomosis, one set of anastomosis mechanisms can be controlled separately to improve the flexibility and targeting of the surgical operation. The symmetrical arrangement of the two sets of anastomosis mechanisms can make the prostate tissue more evenly stressed during the anastomosis process, avoiding tissue traction deformation or uneven anastomotic tension caused by unilateral stress, thereby further improving the anastomosis effect and reducing the risk of postoperative complications such as anastomotic leakage and stenosis.

[0046] Example 2

[0047] A method of using a prostate anastomosis traction fixation device includes the following steps:

[0048] After the patient receives general or epidural anesthesia, they are placed in the lithotomy position. The perineum and urethra are routinely disinfected and draped, and a sterile drape is laid to expose the surgical area. The surgeon must first check that all components of the device are intact, including whether the operating tube 1 is patent, whether the balloon 4 is leak-free, whether the anastomosis needle 15 is flexible, and whether the traction rope 13 is secure. After confirming everything is in order, the surgeon holds the second end of the operating tube 1 and applies sterile lubricant to the first end to reduce friction during insertion. The operating tube 1 is then slowly inserted through the urethra. During insertion, observation can be conducted throughout using a urethroscope or cystoscope to monitor the position of the tip of the operating tube 1 in real time, ensuring it moves smoothly along the natural urethral canal and avoiding contact with the urethral wall to prevent mucosal damage. Once the balloon 4 is observed to be completely inside the bladder, the insertion is stopped. At this point, sterile saline or medical gas is drawn using a sterile syringe through the endotracheal tube 2 interface connected to the second end of the operating tube 1 and slowly injected into the balloon 4. During injection, closely monitor the pressure gauge readings on balloon 4, maintaining the pressure within balloon 4 at 15-20 mmHg to ensure full inflation and the formation of a stable intracavitary anchoring structure. The inflated balloon 4 adheres tightly to the bladder wall, effectively preventing displacement during subsequent procedures and providing a reliable support point throughout the entire surgical process.

[0049] After anchoring balloon 4, the surgeon uses both hands: one hand to stabilize the middle of the operating tube 1, and the other hand to slowly pull outwards the second end of the operating tube 1, causing the inflated balloon 4 to gradually move towards the bladder neck and press against it. During the pulling process, the surgeon continuously observes the bladder neck and the post-prostatectomy wound using a cystoscope, adjusting the pulling force and angle according to the degree of wound exposure. The pulling operation is stopped when the post-prostatectomy wound is fully exposed, the edges are clearly visible, and the balloon 4 is stable without causing excessive pressure or displacement on the bladder neck and surrounding tissues. At this point, the wound is within the optimal surgical field of view, creating favorable conditions for subsequent anastomosis. Simultaneously, a preliminary examination of the wound can be performed at this stage to observe for any obvious bleeding points or residual tissue debris, preparing for subsequent anastomosis procedures.

[0050] The operator locates the end of the traction rope 13 externally, grips it with appropriate force, and maintains hand stability. Then, the operator slowly pulls the traction rope 13 towards the second end of the operating tube 1. The traction rope 13 slides within the traction channel 12 on the side wall of the operating tube 1, causing the slide bar 14 to move along the first slope 111 of the herringbone channel 11 towards the second end of the operating tube 1. As the slide bar 14 moves, the anastomosis needle 15, positioned on one side of the slide bar 14, gradually approaches the anastomosis needle inlet / outlet 16 and slowly passes through the inlet / outlet, beginning to pierce the lateral tissue of the prostate. During this process, due to the guiding effect of the first slope 111 of the herringbone channel 11, the anastomosis needle 15 can pierce the tissue at a stable angle and force, ensuring the accuracy of the puncture path. When the slide bar 14 moves to the first limiting groove 113, the mechanical action between the slide bar 14 and the limiting groove produces a significant change in resistance. This change is transmitted to the operator's hand through the traction rope 13, forming clear tactile feedback, indicating that the anastomosis needle 15 has begun to pierce the tissue. Based on this feedback, the surgeon can adjust the traction speed appropriately and control the rhythm of the anastomosis needle 15 entering the tissue to ensure that the anastomosis needle 15 enters the prostate tissue smoothly and accurately, avoiding tissue tearing or deviation in the insertion position due to excessive speed.

[0051] Locking the anastomosis needle 15: After receiving tactile feedback from the first limiting groove 113, maintain a stable pulling force on the traction rope 13, causing the slide rod 14 to continue moving along the first slope 111 of the herringbone channel 11 towards the second limiting groove 114. As the slide rod 14 moves, the anastomosis needle 15 penetrates deeper into the prostate tissue, with the insertion depth gradually increasing. When the slide rod 14 finally slides into the second limiting groove 114 of the herringbone channel 11, due to the special U-shaped structure and bottom offset design of the second limiting groove 114, it will produce a significant locking effect on the slide rod 14. The surgeon will feel a tactile feedback through the traction rope 13 that is completely different from that when entering the first limiting groove 113, manifested as a sudden increase in resistance of the traction rope 13 accompanied by a slight jamming sensation. This secondary tactile feedback clearly indicates that the anastomosis needle 15 has reached the preset anastomosis depth and is locked in that position. At this time, with the support of the second limiting groove 114, the anastomosis needle 15 is firmly inserted into the prostate tissue, which can provide a reliable fixation point for subsequent tissue alignment and prevent the anastomosis needle 15 from shifting during the traction operation tube 1.

[0052] After confirming that the anastomosis needle 15 is stably locked in the appropriate position, the surgeon pulls the operating tube 1 outward again. At this time, the operating tube 1, through the connection between the anastomosis needle 15 and the prostate tissue, transmits the traction force to the prostate stump, causing the prostate stump to gradually move closer together and closely align. During the traction process, the alignment of the prostate stump can be observed in real time using a cystoscope, and the traction force and direction can be adjusted in a timely manner based on the observation results. If misalignment is found, the angle of the operating tube 1 can be adjusted appropriately to align the stumps; if there is excessive local tension, the traction force can be reduced, and the tissue can be allowed to relax naturally before slowly pulling again. For cases where two sets of anastomosis mechanisms are symmetrically set up, the tension of the traction ropes 13 of the two sets of anastomosis mechanisms can be adjusted according to the alignment effect of the wound, so that the prostate tissue is subjected to uniform tension on both sides, avoiding tissue deformation or uneven tension at the anastomosis site caused by excessive force on one side, further improving the alignment quality, ensuring that the stumps are tightly adhered without obvious gaps, and then suturing.

[0053] After completing the tissue closure suture, a comprehensive examination of the anastomosis site is performed to observe for bleeding and the tightness of the closure. If minor bleeding is present, local electrocoagulation hemostasis can be performed under cystoscopy. If there is a slight deviation in closure, the position of the operating tube 1 can be adjusted appropriately and then reconfirmed. After processing, the traction rope 13 is pulled with a stable force, allowing the sliding rod 14 to overcome the resistance of the second limiting groove 114, pass the apex of the herringbone channel 11, enter the second slope 112, and move along the second slope 112 towards the second end of the operating tube 1. As the sliding rod 14 moves, the anastomosis needle 15 gradually withdraws from the prostate tissue, detaches from the tissue, and retracts into the herringbone channel 11, eventually retracting completely into the operating tube 1 to avoid secondary damage to the tissue. During the retrieval of the anastomosis needle 15, close attention should also be paid to the changes in the feel of the traction rope 13 to ensure that the anastomosis needle 15 is retracted smoothly. If significant resistance is encountered, it should not be forcibly pulled. A cystoscope should be used to check for tissue entanglement or jamming of the anastomosis needle 15. After removing the obstruction, the operation can continue to avoid the risk of the anastomosis needle 15 breaking or tissue tearing.

[0054] After the anastomosis needle 15 is completely retracted into the operating tube 1, the operating tube 1 remains inside the urethra and has not been withdrawn. The surgeon connects the flushing tube 3 to the flushing port at the second end of the operating tube 1, turns on the flushing fluid source, and injects an appropriate amount of sterile flushing fluid into the operating tube 1 through the flushing tube 3. Under pressure, the flushing fluid flows through the flushing channel 8 in the operating tube 1 to the guide head 5, and is sprayed out from the flushing port at an appropriate angle and pressure to thoroughly flush the wound and surrounding area in the bladder, cleaning away tissue debris, blood clots, etc. generated during the operation. At the same time, the urine in the bladder and the waste fluid after flushing flow into the guide channel 10 of the operating tube 1 through the urinary catheter port 7 on the guide head 5, and is discharged from the body through the guide channel 10, achieving simultaneous flushing and drainage. During the flushing process, the flushing effect in the bladder can be judged by observing the color and transparency of the discharged waste fluid, until the discharged fluid is clear and free of obvious impurities, indicating that the bladder flushing is complete. Subsequently, the flushing fluid source is turned off and the flushing tube 3 is disconnected. Next, using a syringe through the endotracheal tube 2 interface, the liquid or gas inside the balloon 4 is completely withdrawn, restoring the balloon 4 to its initial flattened state. Finally, the operator slowly withdraws the operating tube 1 from the urethra, allowing observation through a urethroscope during the withdrawal process to ensure smooth exit of the operating tube 1 and avoid damage to the urethra.

[0055] As is known from common technical knowledge, this invention can be implemented through other embodiments that do not depart from its spirit or essential characteristics. Therefore, the disclosed embodiments described above are merely illustrative in all respects and are not the only ones. All modifications within the scope of this invention or its equivalents are included in this invention.

Claims

1. A prostate anastomosis traction fixation device, characterized in that, The device includes an operating tube (1), a balloon (4) disposed on the outer side wall of the first end of the operating tube (1), an anastomosis mechanism disposed on the operating tube (1) near the balloon (4), and a trachea (2) connected to the outer side wall of the second end of the operating tube (1) for inflating and deflating the balloon (4). The anastomosis mechanism includes an anastomosis needle (15) and a control mechanism. The anastomosis needle (15) is used to pierce the operating tube (1) and insert into the prostate tissue under the control of the control mechanism. The anastomosis is achieved by pulling the operating tube (1) to fix the resected prostate tissue. After the anastomosis, the anastomosis needle (15) can be removed from the prostate tissue and returned to the operating tube (1) under the control of the control mechanism.

2. The prostate anastomosis traction fixation device according to claim 1, characterized in that, The control mechanism includes a herringbone channel (11) disposed in the side wall of the operating tube (1) near the first end. The herringbone channel (11) is axially arranged along the operating tube (1). The top of the herringbone channel (11) has an anastomosis needle inlet / outlet (16) corresponding to the position of the operating tube (1). Multiple sets of anastomosis needles (15) are arranged side by side on one side of a slide rod (14). The slide rod (14) is slidably disposed in the herringbone channel (11). The initial position of the slide rod (14) is located at one end of the herringbone channel (11) near the balloon (4). The needle tip of the anastomosis needle (15) faces the second end of the operating tube (1). A traction rope is connected to the slide rod (14). 13) At one end, the traction rope (13) passes through the traction channel (12) opened on the side wall of the operating tube (1) and extends to the outside of the operating tube (1). When the traction rope (13) pulls the slide bar (14) to move along the herringbone channel (11) to the second end of the operating tube (1), the slide bar (14) moves along the first slope (111) of the herringbone channel (11). The anastomosis needle (15) gradually passes through the anastomosis needle inlet and outlet (16) and pierces the prostate tissue. When the anastomosis needle (15) passes over the top of the herringbone channel (11) and reaches the second slope (112), the anastomosis needle (15) gradually detaches from the prostate tissue and enters the herringbone channel (11).

3. The prostate anastomosis traction fixation device according to claim 2, characterized in that, The first slope (111) of the herringbone channel (11) is provided with a first limiting groove (113) located at the lower part of the first slope (111) and a second limiting groove (114) located at the upper part of the first slope (111). The first limiting groove (113) is used to facilitate sensing the position of the sliding rod (14) when it enters. The second limiting groove (114) is a U-shaped groove, and the bottom of the U-shaped groove is offset towards the first limiting groove (113). The second limiting groove (114) is used to indicate that the anastomosis needle (15) has reached the anastomosis position and to provide support force to the anastomosis needle (15) when the sliding rod (14) enters.

4. The prostate anastomosis traction fixation device according to claim 2, characterized in that, The length of the anastomosis needle (15) is greater than the distance from the first slope (111) to the outside of the anastomosis needle inlet and outlet (16).

5. The prostate anastomosis traction fixation device according to claim 1, characterized in that, The second end of the operating tube (1) is also connected to a flushing tube (3). The first end of the operating tube (1) is provided with a guide head (5). The guide head (5) is provided with a flushing port and a catheter hole (7). The flushing channel (8) of the flushing tube (3) and the air passage (9) of the air tube (2) converge at the side wall of the operating tube (1). A guide channel (10) is opened in the operating tube (1). The flushing port is connected to the flushing channel (8). The air passage (9) is connected to the balloon (4). The guide channel (10) is connected to the catheter hole (7).

6. The prostate anastomosis traction fixation device according to claim 2, characterized in that, The slide bar (14) is provided with a magnetic attraction part, which is used to drive the magnetic attraction part through the magnet outside the operating tube (1) and thus drive the slide bar (14) across the herringbone channel (11) to the initial position.

7. The prostate anastomosis traction fixation device according to claim 5, characterized in that, The anastomosis mechanism has two sets symmetrically arranged in the side walls on the upper and lower sides of the flow channel (10).

8. A method of using a prostate anastomosis traction fixation device, based on the prostate anastomosis traction fixation device according to any one of claims 1-7, characterized in that, Includes the following steps, After inserting the first end of the operating tube (1) through the urethra, the balloon (4) is inserted into the bladder and then inflated through the trachea (2) to form an intracavitary anchorage. Pull the operating tube (1) outward so that the balloon (4) presses against the bladder neck, exposing the wound after prostatectomy; The traction rope (13) drives the slide bar (14) to move along the first slope (111) of the herringbone channel (11) to the second end of the operating tube (1), so that the anastomosis needle (15) is inserted into the lateral tissue of the prostate through the anastomosis needle inlet and outlet (16); Continue to pull the traction rope (13) until the slide bar (14) slides into the second limiting groove (114) of the herringbone channel (11), so that the anastomosis needle (15) is locked in the insertion position, and stop the operation of the traction rope (13); Pull the operating tube (1) to make the prostate ends fit together tightly; After the tissue alignment and processing are completed, the traction rope (13) is pulled to make the slide bar (14) move along the second slope (112) of the herringbone channel (11) past the apex of the herringbone channel (11). The anastomosis needle (15) is withdrawn from the tissue and retracted into the operating tube (1). The balloon (4) is deflated and then removed from the device.

9. The method of using the prostate anastomosis traction fixation device according to claim 8, characterized in that, When the slide bar (14) moves to the first limiting groove (113), tactile feedback is generated, indicating that the anastomosis needle (15) begins to penetrate the tissue; when the slide bar (14) enters the second limiting groove (114), secondary tactile feedback is generated, confirming that the anastomosis needle (15) has reached the preset depth and locked the position.

10. The method of using the prostate anastomosis traction fixation device according to claim 8, characterized in that, After the anastomosis needle (15) is withdrawn into the operating tube (1), flushing fluid is injected into the operating tube (1) through the flushing tube (3). The flushing fluid flows out through the flushing port of the guide head (5) to flush the bladder, while urine is discharged through the urinary catheter (7) into the drainage channel (10).

Images