A multi-adaptation novel guide sheath and application thereof

Abstract

The application discloses a multi-adaptation novel guide sheath and application thereof, which comprises a guide sheath sheath body, a guide sheath tube tail end joint connected with the guide sheath sheath body, and a selectable guide sheath end connector which is rapidly assembled and separated with the guide sheath tube tail end joint through a quick conversion joint; the quick conversion joint comprises a first valve body connected with the guide sheath tube tail end joint and a second valve body connected with the selectable guide sheath end connector; a first valve core which moves back and forth along the axial direction of the cavity is arranged in the cavity at the rear part of the first valve body, and a second valve core which moves back and forth along the axial direction of the second valve body is arranged in the interior of the second valve body; when the second valve body is locked by a locking mechanism after being inserted into the cavity at the front part of the first valve body, the first valve core and the second valve core are connected and the hollow channels in the interiors of the two are communicated. The guide sheath tube is changed into a replaceable accessory, and the end connector can be rapidly connected with various devices, so that the adaptability and use efficiency of the guide sheath are improved, and the operation efficiency and safety are improved.

Description

Technical Field

[0001] This invention relates to the technical field of medical devices, and more particularly to a novel multi-adaptive guiding sheath and its application, especially suitable for fields such as urology and interventional radiology. Background Technology

[0002] Existing guide sheaths are mostly single-use products, which are costly and have a limited range of terminal connection methods, restricting their flexibility in clinical applications. For example, in percutaneous nephrolithotomy, it is necessary to connect equipment such as ureteroscopes and lithotripters, and frequent connector changes during the operation increase the operation time and infection risk.

[0003] Guiding sheaths are commonly used medical devices, widely applied in interventional procedures. Traditional guiding sheaths have several problems in clinical use, such as confusing connectors, poor compatibility, and high consumption. Summary of the Invention

[0004] Based on the shortcomings of existing technologies, the technical problem to be solved by this invention is to provide a novel multi-adaptable guide sheath and its application. The sheath body is replaceable, reducing the cost of use, and a quick-connect adapter enables rapid connection with various end connectors, improving surgical efficiency and safety. The guide sheath is transformed into a replaceable accessory, and the end connector can be quickly connected to various devices, improving the compatibility and efficiency of the guide sheath and solving the problems of connector confusion, poor compatibility, and high consumption in the clinical use of existing guide sheaths.

[0005] To achieve the above objectives, the present invention employs the following technical measures:

[0006] A novel multi-adaptive guide sheath includes a guide sheath tube body, a guide sheath tube tail end connector connected to the guide sheath tube body, and an optional guide sheath end connector for quick assembly and disassembly via a quick-change connector. The quick-change connector includes a first valve body connected to the guide sheath tube tail end connector and a second valve body connected to the optional guide sheath end connector. The tail of the first valve body has a first internal thread for threaded connection to the guide sheath tube tail end connector; the tail of the second valve body has a second internal thread for threaded connection to the optional guide sheath end connector. A first valve core that moves back and forth along its axial direction is located in a cavity at the rear of the first valve body, and a second valve core that moves back and forth along its axial direction is located inside the second valve body. After the second valve body is inserted into the cavity at the front of the first valve body... When locked by the locking mechanism, the first valve core and the second valve core are connected and their internal hollow channels are interconnected; the locking mechanism includes a sleeve sleeved on the outer periphery of the front part of the first valve body and capable of moving back and forth, and a locking ball uniformly embedded in the front part of the first valve body along the circumferential direction and capable of moving along the radial direction of the first valve body; the outer peripheral surface of the second valve body is formed with a ball groove for the locking ball to fall into; the inner side of the sleeve has a protruding annular blocking part; when the second valve body is inserted into the cavity at the front part of the first valve body, the annular blocking part squeezes the locking ball so that it is stuck in the ball groove, locking the second valve body in the cavity at the front part of the first valve body; when the annular blocking part moves away from the locking ball, the second valve body is unlocked, and the second valve body and the first valve body separate.

[0007] Preferably, a sleeve spring is provided between the stepped portion of the front outer periphery of the first valve body and the annular blocking portion of the sleeve. When the sleeve is forced to move towards the rear of the second valve body, the sleeve spring is compressed, and the annular blocking portion moves away from the locking ball. When the sleeve is released, the sleeve spring automatically resets and pushes the sleeve so that its annular blocking portion presses against the locking ball and is positioned on the locking ball.

[0008] Furthermore, an O-ring is fitted onto the outer peripheral surface of the front end of the first valve body to restrict the forward movement of the sleeve.

[0009] Preferably, the tail of the first valve body is equipped with a first limiting connector for supporting and allowing the first valve core to move back and forth, and a first valve core spring is provided between the first stepped portion of the first valve core near its front end and the first limiting connector; the tail of the second valve body is equipped with a second limiting connector for supporting and allowing the second valve core to move back and forth, and a second valve core spring is provided between the first stepped portion of the second valve core near its front end and the second limiting connector.

[0010] Preferably, in the initial state, the front end of the first valve core extends into the cavity at the front end of the first valve body; in the initial state, the front end of the second valve core extends out of the second valve body.

[0011] Furthermore, the cross-sections of the first and second limiting connectors are both convex, and the first and second valve core springs are respectively sleeved on the outer periphery of the small diameter ends of the first and second limiting connectors; when the second valve body is locked in the first valve body, the second stepped portions of the first and second valve cores have gaps with the small diameter ends of the first and second limiting connectors, respectively.

[0012] Furthermore, the optional guide sheath end connector includes a guide sheath handle, and any one of a ureteroscope interface, a lithotripter interface, and a negative pressure aspirator interface.

[0013] The above-mentioned multi-adaptive novel guide sheath of the present invention is used to connect the guide sheath to a ureteroscope, a lithotripter, or a negative pressure aspirator. In use, the ureteroscope interface is threadedly connected to the second valve body to establish a connection between the ureteroscope and the guide sheath, or the lithotripter interface is threadedly connected to the second valve body to quickly establish a connection between the lithotripter and the guide sheath, or the negative pressure aspirator interface is threadedly connected to the second valve body to quickly establish a connection between the negative pressure aspirator and the guide sheath.

[0014] Compared with existing guidance sheaths, the beneficial effects and advantages of the multi-adaptive novel guidance sheath of the present invention and its application are as follows:

[0015] 1. Replaceable sheath body reduces usage costs: Assuming that the cost of disposable sterile guide sheaths is mostly over 300 yuan, the cost of a replaceable sheath body is about 30 yuan, and the remaining parts can be steam sterilized by the hospital itself, with the cost being only 10% of that of traditional disposable sterile guide sheaths.

[0016] 2. Multifunctional adaptability, improving surgical efficiency: Through quick conversion connectors, various end connectors can be quickly connected, reducing surgical time. For example, the time to connect a ureteroscope can be shortened from 2 minutes to 30 seconds, improving efficiency by 75%.

[0017] 3. Reduced infection risk: By reducing the number of connector replacements, the risk of infection during surgical procedures is lowered. Traditional disposable sterile guide sheaths, when used with multiple devices or instruments during surgery, have an infection rate of over 60%. The multi-adaptive new guide sheath of this invention has an infection rate of only 1% compared to existing guide sheaths, significantly improving postoperative recovery time and reducing patient suffering.

[0018] 4. This invention achieves rapid connection with various devices through a quick-connect adapter, improving the adaptability and efficiency of the guide sheath. Compared with traditional guide sheaths, the multi-adaptive novel guide sheath of this invention has advantages such as strong adaptability, low consumption, simple operation, and stable connection, and has broad application prospects.

[0019] 5. This invention achieves multi-functional adaptability of the guide sheath through a replaceable sheath body and a quick-change connector, reducing usage costs, improving surgical efficiency and safety, and has significant clinical application value. Attached Figure Description

[0020] To more clearly illustrate the technical solution of the present invention, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0021] Figure 1 This is a schematic diagram of the structure of the novel multi-adapter guide sheath of the present invention;

[0022] Figure 2 This is an exploded view of the multi-adaptive novel guidance sheath of the present invention;

[0023] Figure 3 This is a schematic diagram of the first valve body and the second valve body before locking.

[0024] Figure 4 This is a schematic diagram of the first valve body and the second valve body of the present invention after locking.

[0025] In the picture:

[0026] 1-Guiding sheath body;

[0027] 2-Guiding sheath end connector;

[0028] 3-Quick conversion connector A section, 301-First valve body, 302-First limit connector, 303-Sleeve, 304-Locking ball, 305-First valve core spring, 306-First valve core, 307-Sleeve spring, 308-O-ring;

[0029] 4-Quick conversion connector B section, 401-Second valve body, 402-Second valve core, 403-Ball groove, 404-Second valve core spring, 405-Second limit connector;

[0030] 5-Optional guide sheath end connector. Detailed Implementation

[0031] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0032] See below Figures 1 to 4 The present invention provides a detailed description of the novel multi-adaptive guiding sheath and its applications.

[0033] The multi-adaptive novel guide sheath provided by the present invention includes a guide sheath tube body 1, a guide sheath tube tail end connector 2, a quick conversion connector A part 3, a quick conversion connector B part 4, and an optional guide sheath end connector 5. The quick conversion connector A part 3 and the quick conversion connector B part 4 form a quick conversion connector, which enables quick assembly and separation of the guide sheath tube tail end connector 2 and the optional guide sheath end connector 5.

[0034] The quick-change connector A part 3 includes a first valve body 301 as a housing part, which is used to lock the quick-change connector A part 3 and quick-change connector B part 4 together with the second valve body 401 of the quick-change connector B part 4.

[0035] The quick-change connector B part 4 includes a second valve body 401, which serves as the housing part and is used in conjunction with the first valve body 301. After the second valve body 401 is inserted into the cavity at the front of the first valve body 301, it is locked by a locking mechanism.

[0036] The tail of the first valve body 301 is provided with a first internal thread that is threaded to the tail end connector 2 of the guide sheath tube; the tail of the second valve body 401 is provided with a second internal thread that is threaded to the optional end connector 5 of the guide sheath.

[0037] The first valve body 301 has a first valve core 306 that moves back and forth along its axial direction in the cavity at the rear. The second valve body 401 has a second valve core 402 that moves back and forth along its axial direction inside the cavity. Both the first valve core 306 and the second valve core 402 have hollow channels inside. When the first valve body 301 and the second valve body 401 are connected, the two hollow channels are closed. Various conduits, guide wires, etc. can pass through the interior of the hollow channels. When the second valve body 401 is inserted into the cavity at the front of the first valve body 301 and locked by the locking mechanism, the first valve core 306 and the second valve core 402 are connected and their internal hollow channels are connected.

[0038] The locking mechanism of the present invention includes a sleeve 303 that is sleeved on the outer periphery of the front part of the first valve body 301 and can move back and forth, and a locking ball 304 that is uniformly embedded in the front part of the first valve body 301 along the circumferential direction and can move along the radial direction of the first valve body 301. The outer peripheral surface of the second valve body 401 has a ball groove 403 for the locking ball 304 to fall into. The locking ball 304 is engaged in the ball groove 403 to lock the first valve body 301 and the second valve body 401. When the locking ball 304 is located in the through groove at the front part of the first valve body 301 and is at the center of the through groove, the locking ball 304 exposes two ports of the through groove. The locking ball 304 moves axially within the through groove. A contraction portion is provided at the port of the through groove near the center line of the first valve body 301 to prevent the locking ball 304 from sliding out of the through groove. The diameter of this contraction portion is slightly smaller than the maximum diameter of the locking ball 304. The locking ball 304 moves passively in the radial direction of the first valve body 301 under the action of the outer peripheral surface of the second valve body 401. The inner side of the sleeve 303 has a protruding annular blocking part. When the second valve body 401 is inserted into the cavity at the front of the first valve body 301, the annular blocking part squeezes the locking ball 304 so that it is locked in the ball groove 403, locking the second valve body 401 in the cavity at the front of the first valve body 301; when the annular blocking part moves away from the locking ball 304, the second valve body 401 is unlocked, and the second valve body 401 and the first valve body 301 separate. The sleeve 303 is a collar adapted to the front shape of the first valve body 301, and the sleeve spring 307 is inside it. The ability to separate / close is provided by the buffering force of the sleeve spring 307.

[0039] A sleeve spring 307 is provided between the stepped portion of the front outer periphery of the first valve body 301 and the annular blocking portion of the sleeve 303. When force is applied to the sleeve 303 to move it toward the rear of the second valve body 401, the sleeve spring 307 is compressed, and the annular blocking portion moves away from the locking ball 304; when the sleeve 303 is released, the sleeve spring 307 automatically resets and pushes the sleeve 303 so that its annular blocking portion presses against the locking ball 304 and is positioned on the locking ball 304. An O-ring 308 is sleeved on the outer peripheral surface of the front end of the first valve body 301 to restrict the forward movement of the sleeve 303. The O-ring 308 positions the front end of the annular blocking portion of the sleeve 303, preventing the sleeve 303 from slipping off the first valve body 301 and ensuring that the annular blocking portion is positioned on the locking ball 304, thus restricting the movement of the locking ball 304.

[0040] A first limiting connector 302 for supporting and allowing the first valve core 306 to move back and forth is installed at the tail of the first valve body 301. A first valve core spring 305 is provided between the first stepped portion of the first valve core 306 near its front end and the first limiting connector 302. A second limiting connector 405 for supporting and allowing the second valve core 402 to move back and forth is installed at the tail of the second valve body 401. A second valve core spring 404 is provided between the first stepped portion of the second valve core 402 near its front end and the second limiting connector 405. The first limiting connector 302 and the second limiting connector 405 support the first valve core 306 and the second valve core 402 respectively, while simultaneously positioning the valve cores to prevent misalignment. In the initial state, the front end of the first valve core 306 extends into the cavity at the front end of the first valve body 301. In the initial state, the front end of the second valve core 402 extends out of the second valve body 401. With this configuration, when the second valve core 402 is fully inserted into the cavity at the front end of the first valve body 301 (i.e., the front end of the second valve body 401 abuts against the bottom of the cavity at the front end of the first valve body 301, that is, the locking ball 304 is completely located in the ball groove 403), the first valve core 306 and the second valve core 402 can be tightly connected under the elastic force of the first valve core spring 305 and the second valve core spring 404, which increases the reliability of the connection.

[0041] The first limiting connector 302 and the second limiting connector 405 both have a convex cross-section. The first valve core spring 305 and the second valve core spring 404 are respectively fitted around the outer periphery of the small-diameter ends of the first limiting connector 302 and the second limiting connector 405. When the second valve body 401 is locked in the first valve body 301, the second stepped portions of the first valve core 306 and the second valve core 402 have gaps with the small-diameter ends of the first limiting connector 302 and the second limiting connector 405, respectively. The first valve core spring 305 and the second valve core spring 404 contract or release according to the connected and disconnected states of the first valve body 301 and the second valve body 401, locking or unlocking, providing a buffering force. When the first valve core 306 and the second valve core 402 are in contact, it is a hard contact, requiring a buffering force to reduce the impact force. The first valve core spring 305 and the second valve core spring 404 enable the first valve core 306 and the second valve core 402 to be slightly movable after contact connection.

[0042] The working principle of the quick-connect adapter of the present invention:

[0043] Preparation: Thread the guide sheath (guide sheath end connector 2) to the first valve body 301, and thread the ring handle (optional guide sheath end connector 5) to the second valve body 401. A schematic diagram showing the first valve body 301 and second valve body 401 not yet connected is shown below. Figure 3 As shown.

[0044] Insertion: Push the sleeve 303 to the left with your hand. When the sleeve spring 307 is compressed to its limit, the first valve body 301 of the quick-connect coupling is inserted into the second valve body 401, thus realizing the insertion of the first valve body 301 and the second valve body 401. The structure is as follows: Figure 4 As shown.

[0045] Locking: When the front end of the second valve body 401 contacts the bottom of the cavity at the front of the first valve body 301, the sleeve 303 is released. Through the automatic reset function of the sleeve spring 307, the internal locking ball 304 falls into the ball groove 403, automatically locking the first valve body 301. Simultaneously, the O-ring 308 restricts the movement of the annular blocking part of the sleeve 303, ensuring a stable connection and achieving locking at the interface. The structure is as follows: Figure 4 As shown by the dashed line.

[0046] Disconnection: Push the sleeve 303 to the left. Due to the reset of the first valve core spring 305 and the second valve core spring 404, the locking ball 304 is squeezed out of the ball groove 403, the lock is released, and the first valve body 301 is pulled out, thus achieving disconnection at the interface between the first valve body 301 and the second valve body 401.

[0047] The multi-adaptive novel guidance sheath of the present invention comprises the following five components:

[0048] 1. Guiding Sheath Body: Made of medical-grade polyetheretherketone (PEEK) or polyurethane (PU) material, with a diameter range of 5F-26F, a length range of 10cm-50cm, and a wall thickness of 0.1mm-0.5mm. The appropriate specification is selected based on clinical needs. The sheath body surface can be treated with a hydrophilic coating, such as a polyethylene glycol (PEG) coating, to reduce frictional resistance and improve insertion smoothness.

[0049] 2. Guiding sheath end connector: Made of medical-grade polycarbonate (PC) or polysulfone (PSU) material, it is connected to the guiding sheath body 1 by heat fusion or ultrasonic welding to ensure a firm and reliable connection. The guiding sheath end connector 2 has a threaded structure that mates with part A 3 of the quick-change connector.

[0050] 3. Quick-connect coupling part A: includes a first valve body 301, a first limit connector 302, a first valve core 306, a locking ball 304, a first valve core spring 305, a sleeve 303, a sleeve spring 307, and an O-ring 308. The first valve body 301 is made of the same material as the second valve body 401 and has an insertion structure and locking mechanism that mate with the second valve body 401. The first valve core spring 305 is made of medical-grade stainless steel wire. The sleeve 303 and sleeve spring 307 are both made of medical-grade stainless steel wire. The locking ball 304 is made of medical-grade ceramic or stainless steel, with a diameter of 1mm-3mm. The O-ring 308 is made of medical-grade silicone rubber.

[0051] 4. Quick-connect coupling part B: includes a second valve body 401, a second valve core 402, a second limiting connector 405, and a ball bearing groove 403. The second valve body 401 is made of medical-grade titanium alloy or stainless steel, possessing high strength and corrosion resistance. The second limiting connector 405 is made of medical-grade polyetherimide (PEI), possessing good wear resistance and dimensional stability.

[0052] 5. Optional guide sheath end connector: The standard default configuration is a guide sheath handle, which can be connected to a negative pressure aspirator, ureteroscope, lithotripter, etc., as needed. These devices can be connected using standardized interfaces that mate with quick-connect adapter B part 4, such as Luer connectors or other quick-connect interfaces.

[0053] Processing technology of each component of the present invention

[0054] 1. Preparation of the guiding sheath body:

[0055] The guide sheath body 1 is made of a high-molecular polymer material, such as polyurethane or polytetrafluoroethylene, and is manufactured through an extrusion molding process. Specific process parameters are as follows:

[0056] • Extrusion temperature: 180-220℃

[0057] • Extrusion speed: 10-20 m / min

[0058] Cooling temperature: 20-30℃

[0059] Cooling time: 5-10 minutes

[0060] 2. Preparation of the guide sheath end connector:

[0061] The guide sheath end connector 2 is made of medical-grade stainless steel and manufactured using CNC machining. Specific process parameters are as follows:

[0062] • Machining accuracy: ±0.01mm

[0063] • Surface roughness: Ra = 0.8

[0064] Processing speed: 5000 rpm

[0065] 3. The various parts of the quick-change connector are manufactured using different materials and processes. Specific process parameters are as follows:

[0066] • First valve body 301 and second valve body 401: Made of medical-grade stainless steel and manufactured by CNC machining.

[0067] • First valve core 306 and second valve core 402: Made of high molecular polymer material and prepared by injection molding process.

[0068] • First valve core spring 305, second valve core spring 404 and sleeve spring 307: Made of medical-grade stainless steel and manufactured using spring forming process.

[0069] • First limiting connector 302 and second limiting connector 405: Made of high molecular polymer material and manufactured by injection molding process.

[0070] • Sleeve 303: Made of medical-grade stainless steel and manufactured by CNC machining.

[0071] • Locking ball 304: Made of medical-grade stainless steel, manufactured through ball milling process, the locking ball 304 has a diameter of 2mm.

[0072] • O-ring 308: Made of silicone rubber material and prepared by compression molding process.

[0073] 4. Fabrication of the optional guide sheath end connector:

[0074] Preferably, a handle is used; optionally, the guide sheath end connector 5 is made of medical-grade polypropylene, manufactured using a compression molding process. Specific process parameters are as follows:

[0075] 1. Barrel temperature: The melting temperature is usually between 250-290℃.

[0076] 2. Mold temperature: The mold temperature is between 40-80℃, and 50℃ is commonly used.

[0077] 3. Injection pressure: The injection pressure is usually set between 80-140MPa (800-1400bar).

[0078] 4. Holding pressure: The holding pressure is usually about 30%-60% of the injection pressure to avoid shrinkage of the product wall, and the product needs to be held under pressure for a longer period of time (about 30% of the cycle time).

[0079] 6. Injection speed: Screw speed 1.1m / s.

[0080] 7. Drying and cooling time: approximately 12 hours.

[0081] Assembly process:

[0082] The assembly of the multi-adaptive novel guidance sheath of the present invention includes the following steps:

[0083] 1. According to the design requirements, process the guide sheath tube body 1, the guide sheath tube tail end connector 2, the quick conversion connector A part 3, the quick conversion connector B part 4, and the optional guide sheath end connector 5 respectively. The guide sheath tube body 1 has a tube diameter range of 5F-26F, a length range of 10cm-50cm, and a tube wall thickness of 0.1mm-0.5mm.

[0084] 2. Connect the guide sheath end connector 2 to the guide sheath body 1 using ultrasonic welding to ensure a firm and reliable connection.

[0085] 3. Assemble quick-change connector A part 3 and quick-change connector B part 4 respectively.

[0086] 4. Connect the guide sheath end connector 2 to the quick-change connector A part 3 via threads.

[0087] 5. Select the appropriate optional guide sheath end connector 5 (default: grip) based on clinical needs and connect it to quick-change connector part B 4.

[0088] The optional guide sheath end connector 5 of the present invention includes a conventional guide sheath handle, and any one of a ureteroscope interface, a lithotripter interface, and a negative pressure aspirator interface.

[0089] The optional guide sheath end connector 5 is multi-adaptable, not limited to the interfaces mentioned above, and can be adapted to a variety of mating devices. All interfaces feature a 6% internal thread Luer connector.

[0090] Examples of applications of this invention

[0091] 1. Connect the ureteroscope:

[0092] During ureteroscopy, the guide sheath needs to be connected to the ureteroscope. Traditional guide sheaths have poor compatibility, unstable connections, and are prone to leakage. The multi-adaptive guide sheath of this invention can be quickly connected to the ureteroscope via a quick-connect adapter, ensuring a secure connection, preventing leakage, and improving the accuracy and safety of the examination. Simply connect the ureteroscope interface to the four-threaded part B of the quick-connect adapter to quickly establish a connection between the ureteroscope and the guide sheath, facilitating internal kidney observation and manipulation.

[0093] 2. Connect the crusher:

[0094] In lithotripsy, the guide sheath needs to be connected to the lithotripter. Traditional guide sheath connections are complex, inconvenient, and prone to connector malfunctions. The multi-adapter guide sheath of this invention can be quickly connected to the lithotripter via a quick-connect adapter, simplifying operation, ensuring a secure connection, and improving surgical efficiency and safety. In use, simply connect the lithotripter interface to the four-threaded part B of the quick-connect adapter to quickly establish the connection between the lithotripter and the guide sheath, facilitating kidney stone lithotripsy treatment.

[0095] 3. Connect the negative pressure suction device:

[0096] In clinical surgery, negative pressure suction devices are frequently used for aspiration. Traditional guide sheaths require complex connectors for connection, which is cumbersome and prone to connector malfunction. The multi-adapter guide sheath of this invention can be quickly connected to a negative pressure suction device via a quick-connect adapter, simplifying operation, ensuring a secure connection, and improving surgical efficiency.

[0097] By connecting the negative pressure aspirator interface to the quick-connect adapter B part 4 thread, the connection between the negative pressure aspirator and the guide sheath can be quickly established, making it convenient to remove stones and tissue fragments from the surgical field.

[0098] In addition, there are many more compatible applications.

[0099] The innovative aspects of this invention include:

[0100] 1. High adaptability:

[0101] Traditional guide sheaths have poor compatibility, complex connections, and inconvenient operation. The multi-adaptive novel guide sheath of this invention can be quickly connected to various devices, offering strong compatibility and avoiding connector confusion.

[0102] 2. Low consumption:

[0103] The multi-adaptive novel guide sheath of this invention transforms the guide sheath tube into a replaceable accessory, reducing consumption during clinical use. Traditional guide sheaths are consumed in large quantities and are costly.

[0104] 3. Easy to operate:

[0105] The novel multi-adaptive guide sheath of this invention enables rapid connection and disconnection via a quick-change connector, simplifying operation and improving surgical efficiency. Traditional guide sheaths are complex to connect, inconvenient to operate, and inefficient. The novel multi-adaptive guide sheath of this invention enables rapid connection and disconnection via a quick-change connector, simplifying operation and improving surgical efficiency, reducing surgical time by 20%, while traditional guide sheaths are complex to connect, inconvenient to operate, and inefficient.

[0106] 4. Stable connection:

[0107] The novel multi-adaptive guide sheath of this invention achieves automatic locking and secure connection through locking ball 304 and O-ring 308, preventing leakage and improving connection stability by 50%, thus enhancing surgical safety. Traditional guide sheaths have unstable connections and are prone to leakage.

[0108] 5. The multi-adaptive novel guide sheath of the present invention achieves rapid connection through a quick conversion connector, with a connection time of only 5 seconds, while the connection time of traditional guide sheaths usually takes more than 30 seconds, reducing the energy consumption of medical staff and improving the quality of surgery.

[0109] The above description is merely a specific embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any transformations or substitutions that can be understood by those skilled in the art within the technical scope disclosed in the present invention should be included within the scope of the present invention.

Claims

1. A novel multi-adaptive guidance sheath, characterized in that, Includes a guide sheath tube body (1), a guide sheath tube tail end connector (2) connected to the guide sheath tube body (1), and an optional guide sheath end connector (5) that enables quick assembly and separation from the guide sheath tube tail end connector (2) via a quick conversion connector; The quick-connect adapter includes a first valve body (301) connected to the guide sheath end connector (2) and a second valve body (401) connected to the optional guide sheath end connector (5). The tail of the first valve body (301) is provided with a first internal thread that is threaded to the guide sheath end connector (2); the tail of the second valve body (401) is provided with a second internal thread that is threaded to the optional guide sheath end connector (5). The first valve body (301) has a first valve core (306) that moves back and forth along its axial direction in the cavity at the rear, and the second valve body (401) has a second valve core (402) that moves back and forth along its axial direction inside the cavity; when the second valve body (401) is inserted into the cavity at the front of the first valve body (301) and locked by the locking mechanism, the first valve core (306) and the second valve core (402) are connected and their internal hollow channels are connected. The locking mechanism includes a sleeve (303) sleeved on the front outer periphery of the first valve body (301) and movable back and forth, and locking balls (304) uniformly embedded in the front part of the first valve body (301) along the circumferential direction and movable along the radial direction of the first valve body (301); the outer peripheral surface of the second valve body (401) is formed with ball grooves (403) for the locking balls (304) to fall into; the inner side of the sleeve (303) has a protruding part. When the second valve body (401) is inserted into the cavity at the front of the first valve body (301), the annular blocking part presses the locking ball (304) so ​​that it is locked in the ball groove (403), thus locking the second valve body (401) in the cavity at the front of the first valve body (301); when the annular blocking part moves away from the locking ball (304), the second valve body (401) is unlocked, and the second valve body (401) and the first valve body (301) separate. A sleeve spring (307) is provided between the stepped portion on the outer periphery of the front part of the first valve body (301) and the annular blocking portion of the sleeve (303). When the sleeve (303) is subjected to force and moves to the rear of the second valve body (401), the sleeve spring (307) is compressed, and the annular blocking portion moves away from the locking ball (304). When the sleeve (303) is released, the sleeve spring (307) automatically resets and pushes the sleeve (303) so that its annular blocking portion presses against the locking ball (304) and is positioned on the locking ball (304). An O-ring (308) for restricting the forward movement of the sleeve (303) is sleeved on the outer peripheral surface of the front end of the first valve body (301).

2. The novel multi-adapter guide sheath according to claim 1, characterized in that, The tail of the first valve body (301) is equipped with a first limiting connector (302) for supporting and allowing the first valve core (306) to move back and forth. A first valve core spring (305) is provided between the first stepped portion of the first valve core (306) near its front end and the first limiting connector (302). The tail of the second valve body (401) is equipped with a second limiting connector (405) for supporting and allowing the second valve core (402) to move back and forth. A second valve core spring (404) is provided between the first stepped portion of the second valve core (402) near its front end and the second limiting connector (405).

3. The novel multi-adapter guide sheath according to claim 2, characterized in that, In the initial state, the front end of the first valve core (306) extends into the cavity at the front end of the first valve body (301); In the initial state, the front end of the second valve core (402) extends out of the second valve body (401).

4. The novel multi-adapter guide sheath according to claim 2, characterized in that, The first limiting connector (302) and the second limiting connector (405) both have a convex cross-section. The first valve core spring (305) and the second valve core spring (404) are respectively sleeved on the outer periphery of the small diameter end of the first limiting connector (302) and the second limiting connector (405). When the second valve body (401) is locked in the first valve body (301), the second stepped portion of the first valve core (306) and the second valve core (402) have gaps with the small diameter end of the first limiting connector (302) and the second limiting connector (405).

5. The novel multi-adapter guiding sheath according to any one of claims 1 to 4, characterized in that, The optional guide sheath end connector (5) includes a guide sheath handle and any one of the following interfaces: ureteroscope interface, lithotripter interface, and negative pressure aspirator interface.

6. An application of the multi-adaptive novel guidance sheath as described in claim 5, characterized in that, The guide sheath is connected to a ureteroscope, lithotripter, or negative pressure aspirator. In use, the ureteroscope interface is threadedly connected to the second valve body to establish the connection between the ureteroscope and the guide sheath, or the lithotripter interface is threadedly connected to the second valve body to quickly establish the connection between the lithotripter and the guide sheath, or the negative pressure aspirator interface is threadedly connected to the second valve body to quickly establish the connection between the negative pressure aspirator and the guide sheath.

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