Self-adapting pipe diameter degradable antibacterial ureter guide sheath

Abstract

The utility model relates to ureteral catheter technical field, concretely is self -adaptation pipe diameter degradable antibacterial ureteral guide sheath, including sheath pipe body, the sheath pipe body includes the inside and outside inner layer, middle layer and outer layer. In the utility model, through the cooperation of the middle layer magnesium alloy net -like support and the outer layer gradient antibacterial hydrophilic coating, the pipe diameter self -adaptation adjustment and the antibacterial time effect extension are realized, and the support is gradually degraded after the operation, does not need to take out secondly, avoids the pain and operation risk brought by traditional metal reinforced guide sheath, the outer layer gradient antibacterial hydrophilic coating adopts the differentiation antibacterial scheme, the insertion end nanometer silver quick -acting coating instantaneously sterilizes, the other end chlorhexidine slow -release coating slowly releases chlorhexidine after the operation, together maintains 7 days antibacterial, compared with the 3 5 days time effect of traditional single antibacterial coating guide sheath, is prolonged significantly, effectively covers the infection risk period, makes the antibacterial effect more comprehensive, stable, coherent, reduces the postoperative infection risk, guarantees the operation success rate and patient prognosis effect.

Description

Technical Field

[0001] This utility model relates to the field of ureteral catheter technology, and in particular to an adaptive diameter biodegradable antibacterial ureteral guide sheath. Background Technology

[0002] Ureteral guiding sheaths are essential medical devices in urological surgery, used to establish a passage for endoscopic instruments and other devices to enter the urinary tract. With the continuous development of minimally invasive urological surgery, the performance requirements for ureteral guiding sheaths are becoming increasingly stringent. Current technologies for ureteral guiding sheaths suffer from several problems. For example, fixed-diameter sheaths cannot adjust the diameter according to the patient's ureteral anatomy, easily leading to mucosal damage or obstruction of the surgical passage. Traditional metal-reinforced guiding sheaths use non-absorbable metal stents, requiring retention or secondary removal postoperatively, increasing patient suffering and surgical risks. Single-coated antibacterial guiding sheaths have short-lasting antibacterial effects, typically only 3-5 days, insufficient to cover the postoperative infection risk period, and lack biodegradability, posing a risk of foreign body reaction. Currently, existing products do not achieve real-time intraoperative diameter adjustment to accommodate different degrees of ureteral stenosis, nor do they combine long-lasting antibacterial properties with biodegradability, and they lack fully absorbable stent structures to avoid secondary surgery. Therefore, developing a ureteral guiding sheath with adaptive diameter adjustment and a biodegradable antibacterial coating has significant clinical and market value. Utility Model Content

[0003] The purpose of this invention is to solve the problems mentioned in the background art and to propose an adaptive diameter biodegradable antibacterial ureteral guide sheath.

[0004] To achieve the above objectives, the present invention adopts the following technical solution: an adaptive diameter biodegradable antibacterial ureteral guide sheath, comprising a sheath body, the sheath body comprising an inner layer, a middle layer and an outer layer from the inside out, the middle layer being a magnesium alloy mesh support, the insertion end of the middle layer being a dynamic adjustment section, the dynamic adjustment section being a magnesium alloy mesh, and the outer layer being a gradient antibacterial hydrophilic coating, the gradient antibacterial hydrophilic coating comprising a nano-silver fast-acting coating at the insertion end and a chlorhexidine slow-release coating at the other end.

[0005] Preferably, the inner layer is made of medical-grade polyurethane.

[0006] Preferably, the outer layer has equidistant scale markings on its surface.

[0007] Compared with the prior art, the advantages and positive effects of this utility model are as follows: 1. In this invention, the combination of a middle layer magnesium alloy mesh stent and an outer layer gradient antibacterial hydrophilic coating achieves adaptive adjustment of the tube diameter and extended antibacterial duration. During surgery, the middle layer magnesium alloy mesh stent provides support to the sheath through the elasticity of the magnesium alloy mesh. When encountering different degrees of ureteral stenosis during surgery, the H2O level is maintained at 10-20 cmH2O. The infusion pressure acts on the distal dynamic adjustment section (magnesium alloy mesh), allowing the tube diameter to be adjusted from 12Fr to 16Fr to adapt to anatomical differences. This avoids the mucosal damage and channel obstruction problems caused by the inability to adjust the tube diameter of existing fixed-diameter guide sheaths, improving surgical adaptability and safety. Furthermore, the stent gradually degrades 14-28 days after surgery, eliminating the need for secondary removal. This avoids the pain and surgical risks associated with traditional metal-reinforced guide sheaths, reducing the burden on patients. The outer gradient antibacterial hydrophilic coating employs a differentiated antibacterial scheme. The nano-silver fast-acting coating at the insertion end provides immediate sterilization, while the chlorhexidine sustained-release coating at the other end slowly releases chlorhexidine postoperatively, maintaining antibacterial activity for 7 days. This significantly extends the duration of antibacterial activity compared to the 3-5 days of traditional single-antibacterial coating guide sheaths, effectively covering the infection risk period. This results in a more comprehensive, stable, and consistent antibacterial effect, reducing the risk of postoperative infection and ensuring surgical success and patient prognosis.

[0008] 2. In this utility model, the design of equidistantly distributed scale markings on the outer surface greatly facilitates surgical operations. During the operation, medical staff can intuitively judge the depth of the sheath entering the ureter through the scale markings on the outer surface, accurately grasp the operation progress, and avoid surgical errors or unnecessary damage to the ureter caused by inaccurate judgment of the entry depth. At the same time, it also helps to accurately record and review the surgical situation after the operation, improves the precision and standardization of the operation, and further ensures the quality of the operation and the safety of the patient. Attached Figure Description

[0009] Figure 1 A schematic diagram of an adaptive diameter biodegradable antibacterial ureteral guide sheath is provided for this utility model; Figure 2 A front view of an adaptive diameter biodegradable antibacterial ureteral guide sheath is presented in this utility model; Figure 3 This invention presents an exploded view of an adaptive diameter biodegradable antibacterial ureteral guide sheath.

[0010] Legend: 1. Sheath body; 101. Inner layer; 102. Middle layer; 103. Outer layer; 1022. Dynamic adjustment section; 2. Scale markings. Detailed Implementation

[0011] To better understand the above-mentioned objectives, features, and advantages of this utility model, the present utility model will be further described below with reference to the accompanying drawings and embodiments. It should be noted that, unless otherwise specified, the embodiments and features described in these embodiments can be combined with each other.

[0012] Many specific details are set forth in the following description in order to provide a full understanding of the present invention. However, the present invention may also be implemented in other ways different from those described herein. Therefore, the present invention is not limited to the specific embodiments disclosed in the following specification.

[0013] Example 1: As Figure 1 - Figure 3 As shown, this utility model provides a technical solution: an adaptive diameter biodegradable antibacterial ureteral guide sheath, including a sheath body 1. The sheath body 1 includes an inner layer 101, a middle layer 102, and an outer layer 103 from the inside out. The middle layer 102 is a magnesium alloy mesh support. The insertion end of the middle layer 102 is a dynamic adjustment section 1022, which is a magnesium alloy mesh. The outer layer 103 is a gradient antibacterial hydrophilic coating. The gradient antibacterial hydrophilic coating includes a nano-silver fast-acting coating at the insertion end and a chlorhexidine sustained-release coating at the other end. The inner layer 101 is made of medical-grade polyurethane.

[0014] The beneficial effects achieved in this embodiment 1 are as follows: Through the combination of the middle layer 102 magnesium alloy mesh scaffold and the outer layer 103 gradient antibacterial hydrophilic coating, adaptive adjustment of the tube diameter and extended antibacterial duration are achieved. Post-operatively, the magnesium alloy mesh scaffold and mesh are gradually absorbed by the body according to a set degradation cycle of 14-28 days, eliminating the need for secondary removal and avoiding the pain and surgical risks associated with traditional metal-reinforced guide sheaths. The outer layer 103 gradient antibacterial hydrophilic coating employs a differentiated antibacterial scheme: a fast-acting nano-silver coating at the insertion end provides immediate sterilization, while a chlorhexidine sustained-release coating at the other end provides post-operative post-operative protection. Slow-release chlorhexidine provides 7 days of antibacterial protection, significantly extending the duration of action compared to the 3-5 days of traditional single-coated antibacterial guide sheaths. This effectively covers the infection risk period, resulting in a more comprehensive, stable, and consistent antibacterial effect, reducing the risk of postoperative infection, and ensuring surgical success and patient prognosis. The inner layer 101 is made of medical-grade polyurethane, which, with its excellent smoothness, effectively reduces the friction experienced by surgical instruments when pushed into the sheath, ensuring smooth instrument insertion and removal. This makes surgical procedures more convenient and efficient, while also reducing the possibility of damage to the ureteral mucosa due to friction.

[0015] Example 2: Figure 2 As shown, the outer layer 103 has scale markings 2 evenly distributed on its surface.

[0016] The beneficial effects achieved in this embodiment 2 are as follows: the design of equidistantly distributed scale markings 2 on the surface of the outer layer 103 greatly facilitates the surgical operation. During the operation, medical staff can intuitively judge the depth of the sheath entering the ureter by the scale markings 2 on the surface of the outer layer 103, accurately grasp the operation process, and avoid surgical errors or unnecessary damage to the ureter caused by inaccurate judgment of the entry depth. At the same time, it also helps to accurately record and review the surgical situation after the operation, improves the precision and standardization of the operation, and further ensures the quality of the operation and the safety of the patient.

[0017] The working principle of this embodiment is as follows: When using this adaptive diameter biodegradable antibacterial ureteral guiding sheath, firstly, one end of the sheath (i.e., the end closest to the outside, for inserting surgical instruments) is prepared. Medical personnel insert the appropriate surgical instruments (such as a ureteroscope) from one end of the sheath and push them into the ureter along the smooth channel made of the inner 101 medical-grade polyurethane layer. During this pushing process, the magnesium alloy mesh support in the middle 102 layer provides support, maintaining the overall stability of the sheath's shape and ensuring that the surgical instruments can smoothly pass through the sheath and enter the ureter. When encountering different degrees of ureteral stenosis, 10- An infusion pressure of 20 cmH2O acts on the dynamic adjustment section 1022 (composed of a magnesium alloy mesh) at the insertion end of the middle layer 102, causing it to deform accordingly based on the pressure. This allows for adaptive adjustment of the tube diameter, for example, from 12 Fr to 16 Fr, to accommodate changes in ureteral width, ensuring unobstructed surgical access and preventing damage to the ureteral mucosa. Simultaneously, the gradient antibacterial hydrophilic coating of the outer layer 103 begins to exert its antibacterial function. During surgery and upon initial entry into the ureter, the nano-silver fast-acting coating at the insertion end immediately kills any bacteria or pathogens it encounters, ensuring a relatively sterile surgical area. Postoperatively, the chlorhexidine sustained-release coating, located away from the insertion end, provides long-lasting antibacterial protection, effectively inhibiting... To inhibit bacterial growth and cover the postoperative infection risk period, the magnesium alloy mesh in the middle layer of the sheath body 1 is hot-pressed and bonded to the outer wall of the inner layer 101. The gradient antibacterial hydrophilic coating on the outer layer is plasma-sprayed onto the outer wall of the middle layer 102. In addition, equidistant scale markings 2 are set on the outer layer 103 of the sheath body 1. During the operation, medical staff can know the depth of the sheath entering the ureter at any time according to the scale markings 2, so as to perform more precise surgical operations. After the operation, the scale markings 2 can also facilitate the recording and summary analysis of surgical-related information. Throughout the process, the various structures work together to provide safer, more efficient and clinically necessary instrument assistance for ureter-related minimally invasive surgery, ensuring the smooth progress of the operation and a good prognosis for the patient.

[0018] The above description is merely a preferred embodiment of the present utility model and is not intended to limit the present utility model in any other way. Any person skilled in the art may make changes or modifications to the above-disclosed technical content to create equivalent embodiments for application in other fields. However, any simple modifications, equivalent changes, and modifications made to the above embodiments based on the technical essence of the present utility model without departing from the technical solution of the present utility model shall still fall within the protection scope of the technical solution of the present utility model.

Claims

1. An adaptive diameter biodegradable antibacterial ureteral guiding sheath, comprising a sheath body (1), characterized in that: The sheath body (1) includes an inner layer (101), a middle layer (102) and an outer layer (103) from the inside out. The middle layer (102) is a magnesium alloy mesh support. The insertion end of the middle layer (102) is a dynamic adjustment section (1022). The dynamic adjustment section (1022) is a magnesium alloy mesh. The outer layer (103) is a gradient antibacterial hydrophilic coating. The gradient antibacterial hydrophilic coating includes a nano-silver fast-acting coating at the insertion end and a chlorhexidine slow-release coating at the other end.

2. The adaptive diameter biodegradable antibacterial ureteral guiding sheath according to claim 1, characterized in that: The inner layer (101) is made of medical-grade polyurethane.

3. The adaptive diameter biodegradable antibacterial ureteral guiding sheath according to claim 1, characterized in that: The outer layer (103) has equidistant scale markings (2) on its surface.

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