Novel multi-adaptive guide sheath and application thereof

Abstract

The invention discloses a novel multi-adaptive guide sheath and application thereof. The novel multi-adaptive guide sheath comprises a guide sheath tube body, a guide sheath tube tail end joint connected with the guide sheath tube body, and an optional guide sheath tail end connector which is quickly assembled and separated from the guide sheath tube tail end joint through a quick conversion joint; the quick conversion connector comprises a first valve body connected with a connector at the tail end of the guide sheath tube and a second valve body connected with a connector at the tail end of the optional guide sheath. A first valve element moving front and back in the axial direction of the first valve body is arranged in a cavity in the rear portion of the first valve body, and a second valve element moving front and back in the axial direction of the second valve body is arranged in the second valve body. When the second valve body is inserted into the cavity in the front of the first valve body and then locked by the locking mechanism, the first valve element and the second valve element are connected, and hollow channels in the first valve element and the second valve element are communicated. The guide sheath tube is changed into a replaceable accessory, and the tail end connector can be quickly connected with various devices, so that the adaptability and the use efficiency of the guide sheath are improved, and the operation efficiency and the safety are improved.

Description

Technical Field

[0001] The present invention relates to the technical field of medical devices, and in particular to a multi-adaptive novel guide sheath and application thereof, and is particularly suitable for the fields of urology, interventional radiology, etc. Background Art

[0002] Most of the existing guide sheaths are disposable products with high costs and a single terminal connection method, which limits their flexibility in clinical applications. For example, in percutaneous nephrolithotomy, it is necessary to connect ureteroscopes, lithotripters and other equipment, and the connectors need to be frequently replaced during the operation, which increases the operation time and infection risk.

[0003] The introducer sheath is a commonly used medical device, which is widely used in interventional surgery. Traditional introducer sheaths have some problems in clinical use, such as confusing joints, poor adaptability, and high consumption. Summary of the invention

[0004] Based on the deficiencies in the prior art, the technical problem to be solved by the present invention is to provide a new multi-adaptive guide sheath and its application, in which the sheath body can be replaced to reduce the cost of use, and a quick connection with a variety of terminal connectors can be achieved through a quick conversion connector, thereby improving surgical efficiency and safety; the guide sheath is turned into a replaceable accessory, and the terminal connector can be quickly connected to a variety of devices, thereby improving the adaptability and use efficiency of the guide sheath, and solving the problems of existing guide sheaths in clinical use, such as confusing connectors, poor adaptability, and high consumption.

[0005] To achieve the above purpose, the present invention adopts the following technical measures:

[0006] A new type of multi-adaptive guide sheath, comprising a guide sheath tube body, a guide sheath tube tail end joint connected to the guide sheath tube body, and an optional guide sheath end connector that can be quickly 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 to the guide sheath tube tail end joint, a second valve body connected to the optional guide sheath end connector, the tail of the first valve body is provided with a first internal thread threadedly connected to the guide sheath tube tail end joint; the tail of the second valve body is provided with a second internal thread threadedly connected to the optional guide sheath end connector; a first valve core that moves forward and backward along its axial direction is provided in a cavity at the rear of the first valve body, and a second valve core that moves forward and backward along its axial direction is provided 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 the hollow channels inside the two are connected; the locking mechanism includes a sleeve that is sleeved on the outer periphery of the front part of the first valve body and can move forward and backward, and a locking ball that is evenly embedded in the front part of the first valve body along the circumferential direction of the first valve body and can move along the radial direction of the first valve body; a ball groove for the locking ball to fall into is formed on the outer peripheral surface of the second valve body; the inner side surface of the sleeve has a protruding annular blocking portion, and when the second valve body is inserted into the cavity in the front part of the first valve body, the annular blocking portion squeezes the locking ball so that it is stuck in the ball groove to lock the second valve body in the cavity in the front part of the first valve body; the annular blocking portion moves away from the locking ball, the second valve body is unlocked, and the second valve body and the first valve body are separated.

[0007] Preferably, a sleeve spring is provided between the stepped portion on the outer periphery of the front portion of the first valve body and the annular blocking portion of the sleeve. When force is applied to the sleeve to move it toward 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 squeezes the locking ball and is located on the locking ball.

[0008] Furthermore, an O-ring for limiting the forward movement of the sleeve is sleeved on the outer peripheral surface of the front end of the first valve body.

[0009] Preferably, a first limit core coupler for supporting and allowing the first valve core to move forward and backward is installed at the tail of the first valve body, and a first valve core spring is provided between the first step portion of the first valve core near its front end and the first limit core coupler; a second limit core coupler for supporting and allowing the second valve core to move forward and backward is installed at the tail of the second valve body, and a second valve core spring is provided between the first step portion of the second valve core near its front end and the second limit core coupler.

[0010] Preferably, in an initial state, the front end of the first valve core extends into a cavity at the front end of the first valve body; and in an 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 limit coupling and the second limit coupling are both convex-shaped, and the first valve core spring and the second valve core spring are respectively sleeved on the outer periphery of the small-diameter end of the first limit coupling and the second limit coupling; when the second valve body is locked in the first valve body, there is a gap between the second step parts of the first valve core and the second valve core and the small-diameter end of the first limit coupling and the second limit coupling, 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 application of the above-mentioned multi-adaptive new guide sheath of the present invention is that the guide sheath is connected to the ureteroscope, lithotripter or negative pressure aspirator; when 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.

[0014] Compared with the existing guide sheath, the multi-adaptive new guide sheath of the present invention and its application have the following beneficial effects and advantages:

[0015] 1. The sheath body can be replaced to reduce the cost of use: Assuming that the cost of a disposable sterilized guide sheath is mostly more than 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, and the cost is only 10% of the traditional disposable sterilized guide sheath.

[0016] 2. Multifunctional adaptability improves surgical efficiency: Through the quick conversion connector, a variety of end connectors can be quickly connected to reduce surgical time. For example, the time to connect the ureteroscope can be shortened from the original 2 minutes to 30 seconds, and the efficiency is increased by 75%.

[0017] 3. Reduce infection risk: Reduce the number of connector replacements and reduce the risk of infection during surgical operations. The traditional disposable sterilized guide sheath is used in conjunction with multiple devices or instruments during surgery, and the infection rate is over 60%. The infection rate of the multi-adaptive new guide sheath of the present invention is only 1% compared to the existing guide sheath, which greatly improves the patient's postoperative recovery time and reduces the patient's pain.

[0018] 4. The invention realizes quick connection with various devices through a quick conversion joint, thereby improving the adaptability and use efficiency of the guide sheath. Compared with the traditional guide sheath, the multi-adaptive new guide sheath of the invention has the advantages of strong adaptability, low consumption, simple operation, stable connection, etc., and has broad application prospects.

[0019] 5. The present invention realizes the multifunctional adaptability of the guide sheath through the replaceable sheath body and the quick conversion connector, reduces the use cost, improves the operation efficiency and safety, and has significant clinical application value. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] In order to more clearly illustrate the technical solution of the present invention, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

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

[0022] Figure 2 It is an exploded schematic diagram of the multi-adaptive novel guide sheath of the present invention;

[0023] Figure 3 It is a schematic diagram of the first valve body and the second valve body before being locked in the present invention;

[0024] Figure 4 It is a schematic diagram of the first valve body and the second valve body after being locked in the present invention.

[0025] In the figure:

[0026] 1-Introducer sheath body;

[0027] 2-Introducing sheath tail end connector;

[0028] 3-part A of quick-change joint, 301-first valve body, 302-first limit coupling core, 303-sleeve, 304-locking ball, 305-first valve core spring, 306-first valve core, 307-sleeve spring, 308-O-ring;

[0029] 4-part B of quick-change joint, 401-second valve body, 402-second valve core, 403-ball groove, 404-second valve core spring, 405-second limit coupling core;

[0030] 5-Optional introducer sheath end connector. DETAILED DESCRIPTION

[0031] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0032] Below, see Figures 1 to 4 The multi-adaptive novel guide sheath of the present invention and its application are described in detail.

[0033] The multi-adaptive novel guide sheath provided by the present invention comprises 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, wherein the quick conversion connector A part 3 and the quick conversion connector B part 4 constitute a quick conversion connector, through which the guide sheath tube tail end connector 2 and the optional guide sheath end connector 5 are quickly assembled and separated.

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

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

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

[0037] A first valve core 306 that moves forward and backward along its axial direction is provided in the cavity at the rear of the first valve body 301, and a second valve core 402 that moves forward and backward along its axial direction is provided inside the second valve body 401. The first valve core 306 and the second valve core 402 both have hollow passages inside. When the first valve body 301 and the second valve body 401 are connected, the two hollow passages are closed, and various catheters, guide wires, etc. can pass through the interior of the hollow passages. When the second valve body 401 is inserted into the cavity at the front of the first valve body 301 and is locked by the locking mechanism, the first valve core 306 and the second valve core 402 are connected and the hollow passages inside the two are communicated.

[0038] The locking mechanism of the present invention includes a sleeve 303 which is sleeved on the outer periphery of the front part of the first valve body 301 and can move forward and backward, and a locking ball 304 which is uniformly embedded in the front part of the first valve body 301 along the circumferential direction of the first valve body 301 and can move along the radial direction of the first valve body 301. The outer peripheral surface of the second valve body 401 is formed with a ball groove 403 for the locking ball 304 to fall into. The locking ball 304 is stuck in the ball groove 403 to lock the first valve body 301 and the second valve body 401. The locking ball 304 is located in the through groove at the front part of the first valve body 301, and when the locking ball 304 is located at the center position of the through groove, the locking ball 304 exposes two ports of the through groove, and the locking ball 304 moves in the through groove along its axial direction. The port of the through groove close to the center line of the first valve body 301 has a contraction portion to prevent the locking ball 304 from sliding out of the through groove, and the diameter of the contraction portion is slightly smaller than the maximum diameter of the locking ball 304. The locking ball 304 is passively moved along 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 surface of the sleeve 303 has a protruding annular blocking portion. When the second valve body 401 is inserted into the cavity in front of the first valve body 301, the annular blocking portion squeezes the locking ball 304 so that it is stuck in the ball groove 403 and the second valve body 401 is locked in the cavity in front of the first valve body 301; the annular blocking portion 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 are separated. The sleeve 303 is a sleeve ring that matches the front shape of the first valve body 301, and the sleeve spring 307 is inside it, and the buffering force of the sleeve spring 307 provides the separation / closing ability.

[0039] A sleeve spring 307 is provided between the stepped portion of the outer periphery of the front portion 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 squeezes the locking ball 304 and is located on the locking ball 304. An O-ring 308 for limiting the forward movement of the sleeve 303 is sleeved on the outer periphery of the front end of the first valve body 301. The O-ring 308 positions the front end of the annular blocking portion of the sleeve 303 to prevent the sleeve 303 from sliding off the first valve body 301, and ensures that the annular blocking portion is located on the locking ball 304 to limit the movement of the locking ball 304.

[0040] The tail of the first valve body 301 is equipped with a first limit core coupling 302 for supporting and allowing the first valve core 306 to move forward and backward, and a first valve core spring 305 is provided between the first step portion of the first valve core 306 near its front end and the first limit core coupling 302. The tail of the second valve body 401 is equipped with a second limit core coupling 405 for supporting and allowing the second valve core 402 to move forward and backward, and a second valve core spring 404 is provided between the first step portion of the second valve core 402 near its front end and the second limit core coupling 405. The first limit core coupling 302 and the second limit core coupling 405 support the first valve core 306 and the second valve core 402 while positioning the valve core to avoid 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. In this way, 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, thereby increasing the reliability of the connection.

[0041] The cross-sections of the first limit coupling 302 and the second limit coupling 405 are both convex-shaped, and 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 limit coupling 302 and the second limit coupling 405; when the second valve body 401 is locked in the first valve body 301, there is a gap between the second step portion of the first valve core 306 and the second valve core 402 and the small-diameter end of the first limit coupling 302 and the second limit coupling 405. The first valve core spring 305 and the second valve core spring 404 contract or release according to the connection and disconnection state of the first valve body 301 and the second valve body 401, lock or unlock, and provide buffering force. When the first valve core 306 and the second valve core 402 are in contact, it is a hard contact, and a buffering force is required to reduce the impact force. The first valve core spring 305 and the second valve core spring 404 make the first valve core 306 and the second valve core 402 slightly movable after contact and connection.

[0042] The working principle of the quick-change joint of the present invention is:

[0043] Preparation: Thread the guide sheath (guide sheath tail 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. The schematic diagram of the structure in which the first valve body 301 and the second valve body 401 are not connected is shown in FIG. Figure 3 shown.

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

[0045] Locking: When the front end of the second valve body 401 contacts the bottom of the cavity in front of the first valve body 301, the sleeve 303 is released, and the internal locking ball 304 falls into the ball groove 403 through the automatic reset function of the sleeve spring 307, automatically locking the first valve body 301. At the same time, the O-ring 308 limits the movement of the annular blocking part of the sleeve 303 to ensure a stable connection and realize the locking of the interface. The structure is as follows: Figure 4 As shown by the dotted 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, thereby realizing the disconnection at the interface between the first valve body 301 and the second valve body 401.

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

[0048] 1. Guide 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. Choose the appropriate specifications according to clinical needs. The surface of the sheath body can be treated with a hydrophilic coating, such as a polyethylene glycol (PEG) coating, to reduce friction resistance and improve insertion smoothness.

[0049] 2. Guide sheath tail end connector: Made of medical grade polycarbonate (PC) or polysulfone (PSU) material, connected to the guide sheath body 1 by hot melt connection or ultrasonic welding to ensure a firm and reliable connection. The guide sheath tail end connector 2 is provided with a threaded structure that cooperates with the quick-change connector A part 3.

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

[0051] 4. Part B of the quick-change connector: includes a second valve body 401, a second valve core 402, a second limit coupling core 405 and a ball groove 403. The second valve body 401 is made of medical-grade titanium alloy or stainless steel, which has high strength and corrosion resistance. The second limit coupling core 405 is made of medical-grade polyetherimide (PEI) material, which has good wear resistance and dimensional stability.

[0052] 5. Optional introducer sheath end connector: The default configuration is the introducer sheath handle, which can be connected to a negative pressure aspirator, ureteroscope, lithotripter, etc. as needed. The connection of these devices can adopt a standardized interface that cooperates with the quick-change connector B part 4, such as a Luer interface or other quick-connection interface.

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

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

[0055] The guide sheath body 1 is made of high molecular polymer material, such as polyurethane or polytetrafluoroethylene, and is prepared by extrusion molding. The specific process parameters are as follows:

[0056] Extrusion temperature: 180-220℃

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

[0058] Cooling temperature: 20-30℃

[0059] Cooling time: 5-10min

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

[0061] The guide sheath tail end connector 2 is made of medical grade stainless steel and processed by CNC. The specific process parameters are as follows:

[0062] Processing accuracy: ±0.01mm

[0063] Surface roughness: Ra = 0.8

[0064] Processing speed: 5000rpm

[0065] 3. Each part of the quick-change joint is made of different materials and processes. The specific process parameters are as follows:

[0066] The first valve body 301 and the second valve body 401 are made of medical grade stainless steel and processed by CNC.

[0067] The first valve core 306 and the second valve core 402 are made of high molecular polymer material and are prepared by injection molding process.

[0068] The first valve core spring 305, the second valve core spring 404 and the sleeve spring 307 are made of medical grade stainless steel and are prepared by a spring forming process.

[0069] The first limiting core coupler 302 and the second limiting core coupler 405 are made of high molecular polymer material and are prepared by injection molding process.

[0070] Sleeve 303: Made of medical grade stainless steel, processed by CNC.

[0071] Locking ball 304: Made of medical grade stainless steel and prepared by ball milling, the locking ball 304 has a diameter of 2 mm.

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

[0073] 4. Preparation of the optional introducer sheath end connector:

[0074] Preferably, a handle is used, and the guide sheath end connector 5 can be made of medical grade polypropylene through a molding injection molding process. The specific process parameters are as follows:

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

[0076] 2. Mold temperature: The mold temperature is between 40-80℃, and 50℃ is normally 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 wall shrinkage of the product, and it takes a longer time to hold the product under pressure (about 30% of the cycle time).

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

[0080] 7. Drying and cooling time: about 12h.

[0081] Assembly process:

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

[0083] 1. According to the design requirements, the guide sheath body 1, the guide sheath tail connector 2, the quick-change connector A part 3, the quick-change connector B part 4 and the optional guide sheath end connector 5 are processed respectively, wherein the guide sheath 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 tail end connector 2 to the guide sheath body 1 by ultrasonic welding to ensure a firm and reliable connection.

[0085] 3. Assemble the quick-change joint A part 3 and the quick-change joint B part 4 separately.

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

[0087] 5. According to clinical needs, select a suitable optional guide sheath end connector 5 (normal default: handle) and connect it to the quick-change connector B part 4.

[0088] The optional guide sheath terminal 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 has multiple adaptability, not limited to the above interfaces, and can be adapted to a variety of matching equipment. Each interface has a Luer connector with a 6% internal thread.

[0090] Application examples of the present invention

[0091] 1. Connect the ureteroscope:

[0092] During ureteroscopy, the guide sheath needs to be connected to the ureteroscope. Traditional guide sheaths have poor adaptability, unstable connection, and are prone to leakage. The multi-adaptive new guide sheath of the present invention can be quickly connected to the ureteroscope through a quick-change joint, and the connection is stable, which prevents leakage and improves the accuracy and safety of the examination. By threading the ureteroscope interface with the quick-change joint B part 4, the connection between the ureteroscope and the guide sheath can be quickly established, which is convenient for observing and operating the inside of the kidney.

[0093] 2. Connect the lithotripter:

[0094] During lithotripsy, the guide sheath needs to be connected to the lithotripsy machine. Traditional guide sheaths are complicated to connect, inconvenient to operate, and prone to connector confusion. The multi-adaptive new guide sheath of the present invention can be quickly connected to the lithotripsy machine through a quick-change joint, which is easy to operate and has a stable connection, thereby improving surgical efficiency and safety. When in use, the lithotripsy machine interface is threadedly connected to the quick-change joint B part 4, so that the lithotripsy machine and the guide sheath can be quickly connected, which is convenient for kidney stone lithotripsy treatment.

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

[0096] In clinical surgery, it is often necessary to use a negative pressure aspirator for suction operation. Traditional guide sheaths need to be connected through complex joints, which is cumbersome to operate and prone to joint confusion. The multi-adaptive new guide sheath of the present invention can be quickly connected to the negative pressure aspirator through a quick conversion joint, which is easy to operate, has a stable connection, and improves surgical efficiency.

[0097] By threading the interface of the negative pressure aspirator with the quick-change connector B part 4, the connection between the negative pressure aspirator and the guide sheath can be quickly established, making it convenient to remove gravel and tissue fragments in the surgical field.

[0098] There are also many more adaptive applications.

[0099] The innovative features of the present invention include:

[0100] 1. Strong adaptability:

[0101] The traditional guide sheath has poor adaptability, complex connection and inconvenient operation. The multi-adaptable new guide sheath of the present invention can be quickly connected with a variety of devices, has strong adaptability and avoids the situation of confusing joints.

[0102] 2. Low consumption:

[0103] The multi-adaptive new guide sheath of the present invention turns the guide sheath tube into a replaceable accessory, reducing consumption during clinical use. Traditional guide sheaths consume a lot and are costly.

[0104] 3. Easy to operate:

[0105] The multi-adaptive new guide sheath of the present invention can be quickly connected and disconnected through a quick conversion joint, which is easy to operate and improves the surgical efficiency. The traditional guide sheath has complex connection, inconvenient operation and low efficiency. The multi-adaptive new guide sheath of the present invention can be quickly connected and disconnected through a quick conversion joint, which is easy to operate and improves the surgical efficiency, and the surgical time is shortened by 20%. The traditional guide sheath has complex connection, inconvenient operation and low efficiency.

[0106] 4.Solid connection:

[0107] The multi-adaptive new guide sheath of the present invention realizes automatic locking and stable connection through locking ball 304 and O-ring 308 to prevent leakage, and the connection stability is improved by 50%, thereby improving the safety of surgery. The traditional guide sheath connection is unstable and prone to leakage.

[0108] 5. The multi-adaptive new guide sheath of the present invention can be quickly connected through a quick conversion connector, and the connection time only takes 5 seconds, while the traditional guide sheath connection time usually takes more than 30 seconds, which shortens the energy consumption of medical staff and improves the quality of surgery.

[0109] The above description is only a specific implementation of the present invention, but the protection scope of the present invention is not limited thereto. Any changes or substitutions that can be understood by anyone familiar with the technology within the technical scope disclosed by the present invention should be included in the scope of the present invention.

Claims

1. A new multi-adaptive guide sheath, characterized in that: It comprises 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) which can be quickly assembled and separated with the guide sheath tube tail end connector (2) through a quick conversion connector; The quick-change joint comprises a first valve body (301) connected to the guide sheath tube tail end joint (2), and a second valve body (401) connected to the optional guide sheath end connector (5), wherein the tail of the first valve body (301) is provided with a first internal thread threadedly connected to the guide sheath tube tail end joint (2); the tail of the second valve body (401) is provided with a second internal thread threadedly connected to the optional guide sheath end connector (5); A first valve core (306) is provided in the cavity at the rear of the first valve body (301) and is movable forward and backward along its axial direction, and a second valve core (402) is provided inside the second valve body (401) and is movable forward and backward along its axial direction; when the second valve body (401) is inserted into the cavity at the front of the first valve body (301) and is locked by a locking mechanism, the first valve core (306) and the second valve core (402) are connected and the hollow passages inside the two are communicated; The locking mechanism comprises a sleeve (303) which is sleeved on the outer periphery of the front part of the first valve body (301) and can move forward and backward, and a locking ball (304) which is evenly embedded in the front part of the first valve body (301) along the circumferential direction of the first valve body (301) and can move along the radial direction of the first valve body (301); a ball groove (403) for the locking ball (304) to fall into is formed on the outer periphery of the second valve body (401); the inner side surface of the sleeve (303) has a protruding The annular blocking portion is configured to squeeze the locking ball (304) to make it fit into the ball groove (403) when the second valve body (401) is inserted into the cavity in front of the first valve body (301), thereby locking the second valve body (401) in the cavity in front of the first valve body (301); when the annular blocking portion 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) are separated.

2. The multi-adaptive new guide sheath according to claim 1, characterized in that: A sleeve spring (307) is provided between the stepped portion on the outer periphery of the front portion 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 squeezes the locking ball (304) and is located on the locking ball (304).

3. The multi-adaptive new guide sheath according to claim 2, characterized in that: An O-ring (308) for limiting the forward movement of the sleeve (303) is sleeved on the outer peripheral surface of the front end of the first valve body (301).

4. The multi-adaptive novel guide sheath according to claim 1, characterized in that: A first limit coupling core (302) for supporting and allowing the first valve core (306) to move forward and backward is installed at the tail of the first valve body (301), and a first valve core spring (305) is provided between a first stepped portion of the first valve core (306) near its front end and the first limit coupling core (302); A second limit coupling (405) for supporting and allowing the second valve core (402) to move forward and backward is installed at the tail of the second valve body (401), and a second valve core spring (404) is provided between the first step portion of the second valve core (402) near its front end and the second limit coupling (405).

5. The multi-adaptive novel guide sheath according to claim 4, characterized in that: In an 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).

6. The multi-adaptive novel guide sheath according to claim 4, characterized in that: The cross-sections of the first limit coupling (302) and the second limit coupling (405) are both convex-shaped, and the first valve core spring (305) and the second valve core spring (404) are respectively sleeved on the outer periphery of the small-diameter ends of the first limit coupling (302) and the second limit coupling (405); when the second valve body (401) is locked in the first valve body (301), the second step portions of the first valve core (306) and the second valve core (402) have gaps with the small-diameter ends of the first limit coupling (302) and the second limit coupling (405).

7. The multi-adaptive novel guide sheath according to any one of claims 1 to 6, characterized in that: The optional guide sheath terminal connector (5) includes a guide sheath handle and any one of a ureteroscope interface, a lithotripter interface and a negative pressure aspirator interface.

8. An application of the multi-adaptive novel guide sheath as claimed in any one of claim 7, characterized in that: The guide sheath is connected to a ureteroscope, a lithotripter or a negative pressure aspirator; when 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.

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