Improved end-to-end anastomosis catheter for prostatectomy

Abstract

The utility model discloses and medical equipment technical field discloses a kind of improved broken end anastomosis catheter for prostate cancer radical operation, including catheter body and anti-sewing pipe, catheter body is split into two sections, anti-sewing pipe is arranged between two sections catheter body, the outer diameter of anti-sewing pipe is same with the outer diameter of catheter body, the both ends of anti-sewing pipe are respectively fixedly connected with two sections catheter body, the inside of anti-sewing pipe is filled with rigid structure layer, and channel, which is communicated with catheter body, is equipped on rigid structure layer.The utility model is filled with rigid structure layer anti-sewing pipe by additionally being provided with inside in traditional catheter body, when the broken end anastomosis of minimally invasive surgery is carried out, this improved broken end anastomosis catheter not only can play certain guiding role in urethra and bladder anastomosis during operation, and the rigid structure layer filled inside anti-sewing pipe can prevent sewing needle to be pierced, ensure that needle is sewn to enter and go out without being sewn to catheter rubber part.

Description

Technical Field

[0001] This utility model relates to the field of medical device technology, specifically a modified end-to-end anastomotic catheter for radical prostatectomy. Background Technology

[0002] In the field of urology, radical prostatectomy is a key surgical procedure for treating localized prostate cancer. With the rapid development of minimally invasive techniques, laparoscopic surgery and the da Vinci robotic surgical system have become the mainstream operating methods. These techniques achieve precise tissue separation, vascular ligation, and nerve preservation through tiny incisions, significantly reducing intraoperative bleeding and shortening the postoperative recovery period.

[0003] However, some problems still exist in the anastomosis of the urethra and bladder. In traditional procedures, a urinary catheter is required as a guide. However, urinary catheters are mostly made of rubber or silicone. During the anastomosis, both rubber and silicone catheters have poor rigidity, making it easy to suture the catheter to the urethra or bladder tissue, causing tissue damage and affecting the progress of the operation. In addition, if the urinary catheter is accidentally punctured by the suture needle, it can also cause serious postoperative complications, including urinary retention due to catheter dislodgement, urinary fistula at the anastomosis site, and secondary urethral infection, which can affect postoperative recovery. Utility Model Content

[0004] The purpose of this invention is to provide a modified end-to-end anastomotic catheter for radical prostatectomy, in order to solve the problems of current end-to-end anastomosis surgery where the catheter is sutured to the tissue along with the urinary catheter, or where the catheter is leaked during the suturing process, causing postoperative secondary symptoms that affect the patient's perioperative treatment.

[0005] The technical solution of this utility model is: A modified end-to-end anastomosis catheter for radical prostatectomy includes a catheter body and an anti-suture tube. The catheter body is split into two sections, and the anti-suture tube is disposed between the two sections of the catheter body. The outer diameter of the anti-suture tube is the same as the outer diameter of the catheter body. Both ends of the anti-suture tube are fixedly connected to the two sections of the catheter body, respectively. The interior of the anti-suture tube is filled with a rigid structural layer, and the rigid structural layer has a channel communicating with the catheter body. The rigid structural layer prevents the anti-suture tube from being punctured by a suture needle.

[0006] As a further optimization and improvement measure for the rigid structural layer filled inside the anti-stitch tube in the above scheme, the rigid structural layer includes a rigid engineering plastic layer and several rubber material layers. The cross-section of the rigid engineering plastic layer is cylindrical and is fixedly sleeved on the inner wall of the anti-stitch tube. The channel is opened on the rigid engineering plastic layer. The rigid engineering plastic layer has several filling cavities around the center line of the anti-stitch tube, and several rubber material layers are respectively filled into several filling cavities.

[0007] Specifically, the catheter body is a three-way catheter with an internal catheterization channel, a balloon channel, and a flushing channel. The catheterization channel is located in the middle, and the balloon channel and flushing channel are located on both sides of the catheterization channel. The rigid engineering plastic layer has three channels, including a first channel communicating with the catheterization channel, a second channel communicating with the balloon channel, and a third channel communicating with the flushing channel.

[0008] As a further optimization and improvement measure for the internal structure of the anti-stitch tube in the above scheme, the unfolded cross-section of the rigid engineering plastic layer, several rubber material layers, the second channel and the third channel is wavy.

[0009] Specifically, as part of the design dimensions of this application for a modified end-to-end anastomosis catheter for radical prostatectomy, the straight-line distance from the location of the anti-suture tube to the tip of the catheter body is 21 cm-23 cm.

[0010] Specifically, as part of the design dimensions of a modified end-to-end anastomotic catheter for radical prostatectomy according to this application, the length of the anti-suture tube is 1 cm to 1.5 cm.

[0011] Furthermore, as a positioning scheme for the modified end-to-end anastomosis catheter used in radical prostatectomy according to this application, positioning imaging marks are provided on the circumferential outer walls of both the catheter body and the anti-suture tube. The positioning imaging marks are used to locate the position of the anti-suture tube under laparoscopic surgery, so that the anti-suture tube is located at the end-to-end anastomosis site.

[0012] Specifically, as a specific limitation of the positioning scheme of the modified end-to-end anastomosis catheter for radical prostatectomy of this application, the positioning imaging mark includes two sets of symmetrically arranged marking components. Each set of marking components includes two solid line markings and one dashed line marking. The two solid line markings are set on the outer wall of the anti-suture tube, one of which is set near the center of the anti-suture tube, and the other is set at 1 / 4 of the length direction from the end of the anti-suture tube. The dashed line marking is set on the outer wall of the catheter body, and the straight-line distance between the dashed line marking and the end of the anti-suture tube is 1 cm.

[0013] Compared with the prior art, the beneficial effects of this utility model are: By splitting the original urinary catheter body into two sections and adding an anti-suture tube between the two sections, with the anti-suture tube filled with a rigid structural layer, this modified end-to-end anastomosis urinary catheter not only plays a guiding role in the intraoperative urethral and bladder anastomosis during minimally invasive surgery, but also prevents the suture needle from piercing through the rigid structural layer inside the anti-suture tube, ensuring that the suture needle does not suture the rubber part of the urinary catheter during insertion and exit. This modified end-to-end anastomosis urinary catheter can accelerate the progress of the operation, optimize the difficulty of the operation, and greatly reduce the drawbacks and related complications in the anastomosis process. Attached Figure Description

[0014] Figure 1 This is a three-dimensional structural diagram of a modified end-anastomotic catheter for radical prostatectomy according to the present invention.

[0015] Figure 2 This is a top view schematic diagram of a modified end-to-end anastomotic catheter for radical prostatectomy according to the present invention.

[0016] Figure 3 This is a schematic cross-sectional view of the anti-suture tube in a modified end-to-end anastomosis catheter used in radical prostatectomy according to the present invention.

[0017] Figure 4 This is a schematic diagram of the internal unfolding structure of the anti-suture tube in a modified end-to-end anastomosis catheter used in radical prostatectomy according to the present invention.

[0018] Figure 5 This utility model Figure 2 A magnified view of part A in the diagram. Detailed Implementation

[0019] The following is in conjunction with the appendix Figure 1 To the attached Figure 5 The specific embodiments of this utility model will be described in detail below. In the description of this utility model, it should be understood that the terms "center", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model.

[0020] The terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature; in the description of a utility model, unless otherwise stated, "a plurality of" means two or more.

[0021] Example 1 This utility model provides a modified end-to-end anastomosis catheter for radical prostatectomy, comprising a catheter body 1 and an anti-suture tube 2. The catheter body 1 is split into two sections, and the anti-suture tube 2 is disposed between the two sections of the catheter body 1. The outer diameter of the anti-suture tube 2 is the same as the outer diameter of the catheter body 1. Both ends of the anti-suture tube 2 are fixedly connected to the two sections of the catheter body 1, respectively. The interior of the anti-suture tube 2 is filled with a rigid structural layer, and the rigid structural layer has a channel communicating with the catheter body 1. The rigid structural layer prevents the anti-suture tube 2 from being punctured by a suture needle.

[0022] In this embodiment, the original catheter body 1 is split into two sections, and an anti-suture tube 2 is added between the two sections of the catheter body 1. The anti-suture tube 2 is filled with a rigid structural layer. During minimally invasive surgery, when performing end-to-end anastomosis, this improved novel end-to-end anastomosis catheter can not only play a certain guiding role in the intraoperative anastomosis of the urethra and bladder, but also prevent the suture needle from piercing through the rigid structural layer filled inside the anti-suture tube 2, ensuring that the suture needle does not suture the rubber part of the catheter when it enters and exits. This structure can accelerate the progress of the operation, optimize the difficulty of the operation, and greatly reduce the drawbacks and related complications in the anastomosis process.

[0023] Specifically, the rigid structural layer includes a rigid engineering plastic layer 31 and several rubber material layers 32. The rigid engineering plastic layer 31 has a cylindrical cross-section and is fixedly sleeved on the inner wall of the anti-stitch tube 2. The channel is opened on the rigid engineering plastic layer 31. Several filling cavities are opened around the rigid engineering plastic layer 31 along the center line of the anti-stitch tube 2. Several rubber material layers 32 are respectively filled into several filling cavities.

[0024] Among them, engineering plastics can be polypropylene, nylon, polycarbonate or polyethylene, which have the advantages of being lightweight, inexpensive, and having high hardness.

[0025] like Figure 1As shown, the catheter body 1 in this utility model is a three-way catheter. The three-way catheter includes a catheter head and a balloon set on the tube body. The catheter head is located at the end of the catheter that is inserted into the urethra. The balloon is located near the catheter head and expands after being filled with water to fix the position of the catheter in the bladder and prevent the catheter from slipping out. The three-way catheter has a catheter channel, a balloon channel and a flushing channel inside. The catheter channel is located in the middle, and the balloon channel and flushing channel are located on both sides of the catheter channel. The catheter channel is used to drain urine or flushing fluid. The balloon channel is used to fill the balloon with water to fix the position of the catheter. The flushing channel is used to connect flushing fluid or drugs for bladder irrigation or injection of drugs into the bladder. In order to enable the anti-suture tube 2 to be used in conjunction with the three-way catheter, the anti-suture tube 2 has three channels inside, including a first channel 41 that communicates with the catheter channel, a second channel 42 that communicates with the balloon channel and a third channel 43 that communicates with the flushing channel.

[0026] Furthermore, such as Figure 3 As shown, the rigid engineering plastic layer 31, several rubber material layers 32, the second channel 42, and the third channel 43 inside the anti-stitch tube 2 have circular cross-sections, as shown in the figure. Figure 4 As shown, the circumferential unfolded cross section of the rigid engineering plastic layer 31, several rubber material layers 32, the second channel 42 and the third channel 43 is wavy. Through the above arrangement, the purpose of complete fit and ensuring tensile strength can be achieved.

[0027] like Figure 2As shown below, some design dimensions of a modified end-to-end anastomotic catheter for radical prostatectomy according to this application are illustrated and described. The length of the catheter body 1 is 45 cm, the straight-line distance from the position of the anti-suture tube 2 to the tip of the catheter body 1 is 21 cm-23 cm, and the length of the anti-suture tube 2 is 1 cm-1.5 cm. This arrangement ensures that the anti-suture tube 2 is located near the middle of the catheter body 1. During intraoperative guidance, when the catheter body 1 is fully inserted, this range ensures that the anti-suture tube 2 is positioned at the anastomosis site, thus assisting the surgery. Simultaneously, when the catheter is left in place postoperatively, after balloon inflation, the structure is fully exposed outside the urethra when the catheter body 1 is carefully removed, reducing postoperative damage. When the distance between the anti-suture tube 2 and its tip is less than 21 cm, it can still assist in the anastomosis procedure, but it cannot be completely removed and exposed outside the urethra after the operation, which may lead to urethral injury and patient discomfort. When the distance between the anti-suture tube 2 and its tip is greater than 23 cm, due to individual differences, the structure may not be able to enter the intraoperative field of vision, thus losing its purpose of assisting the operation smoothly. At the same time, when performing end-to-end sutures, the suture range during the operation needs to be 0.2 cm-0.5 cm away from the cut end. Setting the length of the anti-suture tube 2 to 1 cm-1.5 cm can ensure the smooth operation of the operation during end-to-end anastomosis. A length exceeding 1.5 cm may cause potential urethral injury or poor patient comfort when inserting and removing the urinary catheter.

[0028] In another embodiment of this utility model, in order to locate the position of the anti-suture tube 2 during the operation, positioning imaging marks are provided on the circumferential outer walls of both the catheter body 1 and the anti-suture tube 2. The positioning imaging marks are used to locate the position of the anti-suture tube 2 under laparoscopic surgery, so that the anti-suture tube 2 is located at the end anastomosis site.

[0029] Specifically, such as Figure 2 and Figure 5 As shown, the positioning imaging mark includes two sets of symmetrically arranged marking components. Each set of marking components includes two solid line markings 51 and one dashed line marking 52. The two solid line markings 51 are set on the outer wall of the anti-suture tube 2. One solid line marking 51 is set near the center of the anti-suture tube 2, and the other solid line marking 51 is set at 1 / 4 of the length direction from the end of the anti-suture tube 2. The dashed line marking 52 is set on the outer wall of the catheter body 1, and the straight-line distance between the dashed line marking 52 and the end of the anti-suture tube 2 is 1 cm.

[0030] With the above setup, a bidirectional positioning process can be achieved using two sets of marking components. A ring of solid lines 51 near the middle of the anti-suture tube 2 constitutes a double solid line marking. During the surgical anastomosis, the catheter body 1 needs to be inserted for guidance. When the first dashed line marking 52 is seen under the endoscope, the insertion speed is slowed down. When another solid line marking 51 is seen (this solid line marking 51 is set at 1 / 4 of the length direction from the end of the anti-suture tube 2), it is confirmed that the direction is correct; otherwise, the catheter needs to be pulled out appropriately. During the movement, when the position of the double solid line marking is in the middle of the anastomosis, the suturing operation can be performed. During the surgical operation, the position of the double solid line marking is kept at the anastomosis. The position can be marked by the solid line marking 51 and the dashed line marking 52, so that the double solid line marking is placed between the two ends more quickly. The rigid structural layer filled inside the anti-suture tube 2 is used to prevent the suture needle from piercing.

[0031] The overall working principle of this utility model is as follows: During minimally invasive surgery, when performing end-to-end anastomosis, the anti-suture tube 2 plays a guiding role in the intraoperative urethral-bladder anastomosis. After complete insertion into the bladder, the anti-suture tube 2 is visible under direct laparoscopic visualization, marked with solid and dashed lines. During the anastomosis procedure, the catheter body 1 is inserted for guidance. When the first dashed line 52 is seen under the endoscope, the insertion speed is slowed. When a solid line 51 is seen again, the direction is confirmed to be correct; otherwise, the catheter should be withdrawn appropriately. During the movement, when the double solid line markings are in the middle of the end-to-end anastomosis, suturing can be performed. During the surgical procedure, the double solid line markings are kept at the end-to-end anastomosis site. The solid line 51 and dashed line 52 mark the position, allowing for faster placement of the double solid line markings between the two ends. The rigid structural layer inside the anti-suture tube 2 prevents the suture needle from piercing, ensuring that the suture needle does not suture the rubber part of the catheter during insertion and withdrawal. After the surgical procedure, the catheter is gently pulled out 15 cm. At approximately 1 cm, use a 20 ml sterile syringe to fill the three-lumen balloon tube with 10 ml-15 ml of water. Gently pull the catheter again. At this point, the high-hardness engineering plastic part should be just pulled out of the urethra, with the exposed part more than 5 cm away from the urethral opening.

[0032] The above-disclosed embodiments are merely preferred embodiments of the present invention. However, the embodiments of the present invention are not limited thereto, and any variations that can be conceived by those skilled in the art should fall within the protection scope of the present invention.

Claims

1. A modified end-to-end anastomosis urinary catheter for prostatectomy, characterized by, The catheter includes a catheter body (1) and an anti-suture tube (2). The catheter body (1) is divided into two sections. The anti-suture tube (2) is placed between the two sections of the catheter body (1). The outer diameter of the anti-suture tube (2) is the same as the outer diameter of the catheter body (1). The two ends of the anti-suture tube (2) are fixedly connected to the two sections of the catheter body (1). The interior of the anti-suture tube (2) is filled with a rigid structural layer. The rigid structural layer has a channel communicating with the catheter body (1). The rigid structural layer prevents the anti-suture tube (2) from being pierced by a suture needle.

2. The modified end-to-end anastomosis urinary catheter for radical prostatectomy according to claim 1, wherein The rigid structural layer includes a rigid engineering plastic layer (31) and several rubber material layers (32). The rigid engineering plastic layer (31) has a cylindrical cross-section and is fixedly sleeved on the inner wall of the anti-stitch tube (2). The channel is opened on the rigid engineering plastic layer (31). The rigid engineering plastic layer (31) has several filling cavities around the center line of the anti-stitch tube (2). Several rubber material layers (32) are respectively filled in several filling cavities.

3. The modified end-to-end anastomosis urinary catheter for prostatectomy according to claim 2, wherein The catheter body (1) is a three-way catheter with a catheterization channel, a balloon channel and a flushing channel inside. The catheterization channel is located in the middle, and the balloon channel and flushing channel are located on both sides of the catheterization channel. There are three channels on the rigid engineering plastic layer (31), including a first channel (41) connected to the catheterization channel, a second channel (42) connected to the balloon channel and a third channel (43) connected to the flushing channel.

4. The modified end-to-end anastomosis urinary catheter for prostatectomy according to claim 3, wherein The unfolded cross-section of the rigid engineering plastic layer (31), several rubber material layers (32), the second channel (42) and the third channel (43) is wavy.

5. The modified end-to-end anastomosis urinary catheter for prostatectomy according to claim 1, wherein The straight-line distance from the location of the anti-suture tube (2) to the tip of the catheter body (1) is 21 cm-23 cm.

6. The modified end-to-end anastomosis urinary catheter for radical prostatectomy according to claim 5, characterized in that, The anti-suture tube (2) has a length of 1 cm to 1.5 cm.

7. The modified end-to-end anastomosis urinary catheter for prostatectomy according to any one of claims 2 to 6, characterized in that, Both the catheter body (1) and the anti-suture tube (2) are provided with positioning imaging marks on their circumferential outer walls. The positioning imaging marks are used to locate the position of the anti-suture tube (2) under laparoscopic surgery, so that the anti-suture tube (2) is located at the end anastomosis site.

8. The modified end-to-end anastomosis urinary catheter for prostatectomy according to claim 7, characterized in that, The positioning imaging mark includes two sets of symmetrically arranged marking components. Each set of marking components includes two solid line markings (51) and one dashed line marking (52). The two solid line markings (51) are set on the outer wall of the anti-suture tube (2). One solid line marking (51) is set near the center of the anti-suture tube (2), and the other solid line marking (51) is set at 1 / 4 of the length direction from the end of the anti-suture tube (2). The dashed line marking (52) is set on the outer wall of the catheter body (1), and the straight-line distance between the dashed line marking (52) and the end of the anti-suture tube (2) is 1 cm.

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