CN119453898A

CN119453898A - A new multi-adaptive guide sheath and its application

Info

Publication number: CN119453898A
Application number: CN202411616989.9A
Authority: CN
Inventors: 邱学文; 郭增佩; 刘飞鸽; 刘载堂
Original assignee: Hunan Bantuo Medical Technology Co ltd
Current assignee: Hunan Bantuo Medical Technology Co ltd
Priority date: 2024-11-13
Filing date: 2024-11-13
Publication date: 2025-02-18
Anticipated expiration: 2044-11-13

Abstract

The invention discloses a novel multi-adaptation guide sheath and application thereof, comprising a guide sheath body, a guide sheath tail end connector connected with the guide sheath body, and an optional guide sheath tail end connector capable of realizing quick assembly and separation through a quick adapter, wherein the quick adapter comprises a first valve body connected with the guide sheath tail end connector and a second valve body connected with the optional guide sheath tail end connector, a first valve core moving forwards and backwards along the axial direction of the first valve body is arranged in a cavity at the rear part of the first valve body, a second valve core moving forwards and backwards along the axial direction of the second valve body is arranged in the second valve body, and when the second valve body is inserted into the cavity at the front part of the first valve body and is locked by a locking mechanism, the first valve core is connected with the second valve core, and hollow channels inside the first valve core and the second valve core are communicated. The invention changes the guiding sheath tube into a replaceable accessory, and the terminal connector can be quickly connected with various devices, thereby improving the suitability and the use efficiency of the guiding sheath and improving the operation efficiency and the safety.

Description

Multi-adaptation novel guide sheath and application thereof

Technical Field

The invention relates to the technical field of medical instruments, in particular to a novel multi-adaptation guide sheath and application thereof, which are particularly suitable for the fields of urology surgery, interventional radiology and the like.

Background

Most of the existing guide sheaths are disposable products, the cost is high, and the terminal connection mode is single, so that the flexibility of the guide sheaths in clinical application is limited. For example, in percutaneous nephrolithotomy, the connection of ureteroscope, lithotripter and other devices is required, and frequent replacement of the connector during operation increases the operation time and risk of infection.

The guiding sheath is a common medical instrument and is widely applied to interventional operations. The traditional guide sheath has some problems in clinical use, such as disordered joints, poor suitability, high consumption and the like.

Disclosure of Invention

Based on the defects existing in the prior art, the technical problem to be solved by the invention is to provide a multi-adaptation novel guide sheath and application thereof, the use cost is reduced, the quick connection with various end connectors is realized through a quick adapter, the operation efficiency and the safety are improved, the guide sheath is changed into a replaceable accessory, the end connectors can be quickly connected with various devices, the suitability and the use efficiency of the guide sheath are improved, and the problems of disordered connectors, poor suitability, large consumption and the like existing in the clinical use of the conventional guide sheath are solved.

In order to achieve the above purpose, the present invention adopts the following technical measures:

The novel multi-adaptation guide sheath comprises a guide sheath body, a guide sheath tail end connector connected with the guide sheath body, and an optional guide sheath tail end connector which is quickly assembled and separated with the guide sheath tail end connector through a quick adapter; the quick adapter comprises a first valve body connected with the tail end connector of the guiding sheath tube and a second valve body connected with the tail end connector of the selectable guiding sheath tube, and the tail part of the first valve body is provided with a first internal thread in threaded connection with the tail end connector of the guiding sheath tube; the tail part of the second valve body is provided with a second internal thread which is in threaded connection with the end connector of the optional guide sheath, a first valve core which moves forwards and backwards along the axial direction is arranged in a cavity at the rear part of the first valve body, a second valve core which moves forwards and backwards along the axial direction is arranged in the second valve body, when the second valve body is inserted into the cavity at the front part of the first valve body and is locked by a locking mechanism, the first valve core is connected with the second valve core, and hollow channels inside the first valve core and the second valve core are communicated, the locking mechanism comprises a sleeve which is sleeved on the outer periphery of the front part of the first valve body and can move forwards and backwards, locking balls which are uniformly 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, the outer periphery of the second valve body is provided with a ball groove in which the locking balls fall, when the second valve body is inserted into the cavity at the front part of the first valve body, the annular blocking part is extruded and blocked by the annular blocking part to enable the locking balls to move away from the annular blocking part to lock the ball groove in the front part of the first valve body, the second valve body is unlocked, and the second valve body is separated from the first valve body.

Preferably, a sleeve spring is arranged between the stepped part of the front periphery of the first valve body and the annular blocking part of the sleeve, the sleeve spring is compressed when the sleeve is forced to move towards the rear part of the second valve body, the annular blocking part moves away from the locking ball, and the sleeve is released, and the sleeve spring automatically resets and pushes the sleeve to enable the annular blocking part to press the locking ball and be positioned on the locking ball.

Further, the outer peripheral surface of the front end of the first valve body is sleeved with an O-shaped ring used for limiting the sleeve to move forwards.

Preferably, the tail of the first valve body is provided with a first limiting core connector for supporting and allowing the first valve core to move forwards and backwards, a first valve core spring is arranged between a first step part of the first valve core, which is close to the front end of the first valve core, and the first limiting core connector, and the tail of the second valve body is provided with a second limiting core connector for supporting and allowing the second valve core to move forwards and backwards, and a second valve core spring is arranged between the first step part of the second valve core, which is close to the front end of the second valve core, and the second limiting core connector.

Preferably, the front end of the first valve core extends into the cavity at the front end of the first valve body in an initial state, and the front end of the second valve core extends out of the second valve body in an initial state.

Further, the sections of the first limiting core connector and the second limiting core connector are in a convex shape, the first valve core spring and the second valve core spring are sleeved on the peripheries of the small diameter ends of the first limiting core connector and the second limiting core connector respectively, and when the second valve body is locked in the first valve body, gaps are reserved between the second stepped parts of the first valve core and the second valve core and the small diameter ends of the first limiting core connector and the second limiting core connector respectively.

Further, the optional introducer sheath end connector includes an introducer sheath handle, and any one of a ureteroscope interface, a lithotripter interface, and a negative pressure aspirator interface.

When the multi-adaptation novel guide sheath is used, the ureteroscope interface is connected with the second valve body in a threaded manner to establish the connection between the ureteroscope and the guide sheath or the lithotripter interface is connected with the second valve body in a threaded manner, so that the connection between the lithotripter and the guide sheath or the connection between the negative pressure aspirator interface and the second valve body can be quickly established, and the connection between the negative pressure aspirator and the guide sheath can be quickly established.

Compared with the existing guiding sheath, the multi-adaptation novel guiding sheath and the application thereof have the beneficial effects and advantages that:

1. The cost of the disposable sterilization guide sheath is assumed to be more than 300 yuan, the cost of the replaceable sheath body is about 30 yuan, and other parts of hospitals can independently sterilize by steam, so that the cost is only 10% of that of the traditional disposable sterilization guide sheath.

2. The multifunctional suitability improves the operation efficiency, namely, through the quick-acting adapter, various end connectors can be quickly connected, the operation time is shortened, for example, the time for connecting a ureteroscope can be shortened to 30 seconds from the original 2 minutes, and the efficiency is improved by 75 percent.

3. The risk of infection is reduced, the number of times of connector replacement is reduced, and the risk of infection in the operation process is reduced. The traditional disposable sterilization guide sheath is matched with a plurality of devices or instruments in operation, the infection rate is more than 60%, compared with the existing guide sheath, the infection rate of the multi-adaptation novel guide sheath is only 1%, the postoperative recovery time of a patient is greatly improved, and the pain of the patient is reduced.

4. The invention realizes the quick connection with various devices through the quick adapter, and improves the adaptability and the use efficiency of the guiding sheath. Compared with the traditional guide sheath, the multi-adaptation novel guide sheath has the advantages of strong adaptability, low consumption, simplicity and convenience in operation, stable connection and the like, and has a wide application prospect.

5. According to the invention, through the replaceable sheath body and the quick adapter, the multifunctional adaptability of the guide sheath is realized, the use cost is reduced, the operation efficiency and the safety are improved, and the guide sheath has remarkable clinical application value.

Drawings

In order to more clearly illustrate the technical solutions of the present invention, the following description will briefly explain the drawings used in the embodiments or the description of the prior art, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and that other drawings can be obtained according to these drawings without inventive effort for a person skilled in the art.

FIG. 1 is a schematic structural view of a multi-fitting novel introducer sheath of the present invention;

FIG. 2 is an exploded view of the multi-fitting novel introducer sheath of this invention;

FIG. 3 is a schematic diagram of the present invention before the first valve body and the second valve body are locked;

fig. 4 is a schematic diagram of the first valve body and the second valve body after locking.

In the figure:

1-an introducer sheath body;

2-a tail end joint of the guiding sheath tube;

3-quick adapter A part, 301-first valve body, 302-first limit core connector, 303-sleeve, 304-locking ball, 305-first valve core spring, 306-first valve core, 307-sleeve spring, 308-O-ring;

The quick-acting type valve comprises a 4-quick-acting adapter B part, a 401-second valve body, a 402-second valve core, a 403-ball groove, a 404-second valve core spring and a 405-second limiting core connector;

5-optional introducer sheath end connector.

Detailed Description

The following description of the embodiments of the present invention will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present invention, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.

The multi-fitting novel introducer sheath of the present invention and its application will now be described in detail with reference to fig. 1-4.

The multi-adaptation novel guide sheath provided by the invention comprises a guide sheath body 1, a guide sheath tail end connector 2, a quick-change connector A part 3, a quick-change connector B part 4 and an optional guide sheath tail end connector 5, wherein the quick-change connector A part 3 and the quick-change connector B part 4 form the quick-change connector, and the quick-change connector is used for quickly assembling and separating the guide sheath tail end connector 2 and the optional guide sheath tail end connector 5.

The quick connect coupling a portion 3 includes a first valve body 301 as a housing portion for locking the quick connect coupling a portion 3 and the quick connect coupling B portion 4 together by a second valve body 401 that mates with the quick connect coupling B portion 4.

The quick-connect B-section 4 comprises a second valve body 401 as a housing section for use with the first valve body 301, the second valve body 401 being locked by a locking mechanism after insertion into a cavity in front of the first valve body 301.

The tail of the first valve body 301 is provided with a first internal thread in threaded connection with the tail joint 2 of the guiding sheath, and the tail of the second valve body 401 is provided with a second internal thread in threaded connection with the optional guiding sheath end connector 5.

A first valve core 306 moving forward and backward along the axial direction thereof is provided in a cavity at the rear of the first valve body 301, and a second valve core 402 moving forward and backward along the axial direction thereof is provided inside the second valve body 401. The first valve core 306 and the second valve core 402 are respectively provided with a hollow channel inside, the first valve body 301 and the second valve body 401 are connected, the two hollow channels are closed, and the inside of the hollow channels can pass through various catheters, guide wires and the like. When the second valve body 401 is inserted into the cavity in the front of the first valve body 301 and then locked by the locking mechanism, the first valve core 306 and the second valve core 402 are connected and hollow passages inside the two are communicated.

The locking mechanism of the present invention includes a sleeve 303 that is fitted around the outer periphery of the front portion of the first valve body 301 and is movable back and forth, and locking balls 304 that are uniformly fitted in the front portion of the first valve body 301 in the circumferential direction of the first valve body 301 and are movable in 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 into which the lock ball 304 falls. The locking balls 304 are caught in the ball grooves 403 to lock the first and second valve bodies 301 and 401. The locking ball 304 is located in a through groove at the front of the first valve body 301, and when the locking ball 304 is located at the center of the through groove, the locking ball 304 exposes two ports of the through groove, the locking ball 304 moves in the through groove in the axial direction thereof, and a constriction preventing the locking ball 304 from sliding out of the through groove is provided at a port of the through groove near the center line of the first valve body 301, the constriction having a diameter slightly smaller than the maximum diameter of the locking ball 304. The lock balls 304 are passively moved in the radial direction of the first valve body 301 by the outer peripheral surface of the second valve body 401. The inner side of the sleeve 303 has a convex 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 presses the locking balls 304 to be clamped into the ball grooves 403 to lock the second valve body 401 in the cavity in front of the first valve body 301, and the annular blocking portion moves away from the locking balls 304 to unlock the second valve body 401, and the second valve body 401 is separated from the first valve body 301. The sleeve 303 is a collar adapted to the front shape of the first valve body 301, and the sleeve spring 307 is provided inside thereof with a capability of separation/closure by a damping force of the sleeve spring 307.

A sleeve spring 307 is provided between the stepped portion of the front outer periphery of the first valve body 301 and the annular stopper portion of the sleeve 303. When the sleeve 303 is forced to move toward the rear of the second valve body 401, the sleeve spring 307 is compressed and the annular blocking portion moves out of the locking balls 304, and the sleeve 303 is released, and the sleeve spring 307 is automatically reset and pushes the sleeve 303 so that the annular blocking portion presses the locking balls 304 and is positioned on the locking balls 304. An O-ring 308 for restricting forward movement of the sleeve 303 is fitted to the outer peripheral surface of the front end of the first valve body 301, and the O-ring 308 positions the front end portion of the annular stopper portion of the sleeve 303, prevents the sleeve 303 from slipping off the first valve body 301, and ensures that the annular stopper portion is positioned on the lock balls 304, restricting movement of the lock balls 304.

The tail of the first valve body 301 is provided with a first limit core connector 302 for supporting and allowing the first valve core 306 to move back and forth, and a first valve core spring 305 is arranged between a first step part of the first valve core 306 near the front end of the first valve core and the first limit core connector 302. The tail of the second valve body 401 is provided with a second limiting core connector 405 for supporting and allowing the second valve core 402 to move back and forth, and a second valve core spring 404 is arranged between a first step part of the second valve core 402 near the front end of the second valve core and the second limiting core connector 405. The first and second limit linkages 302 and 405 support the first and second spools 306 and 402 while positioning the spools 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 element 402 extends out of the second valve body 401. With this arrangement, when the second spool 402 is completely 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, i.e., the locking balls 304 are completely located in the ball grooves 403), the first spool 306 and the second spool 402 can be tightly connected under the elastic force of the first spool spring 305 and the second spool spring 404, and the reliability of connection is increased.

The sections of the first limiting core connector 302 and the second limiting core connector 405 are in a convex shape, the first valve core spring 305 and the second valve core spring 404 are respectively sleeved on the peripheries of the small diameter ends of the first limiting core connector 302 and the second limiting core connector 405, and when the second valve body 401 is locked in the first valve body 301, gaps are reserved between the second stepped parts of the first valve core 306 and the second valve core 402 and the small diameter ends of the first limiting core connector 302 and the second limiting core connector 405 respectively. The first spool spring 305 and the second spool spring 404 are contracted or released, fastened or unlocked according to the connected and disconnected states of the first valve body 301 and the second valve body 401, and provide a buffering force. The first valve core 306 and the second valve core 402 are in hard contact when in contact, a buffer force is needed to reduce the impact force, and the first valve core 306 and the second valve core 402 are joggable after being in contact connection through the first valve core spring 305 and the second valve core spring 404.

The working principle of the quick adapter of the invention is as follows:

Preparation is carried out by screwing the guide sheath (guide sheath tail end connector 2) with the first valve body 301, screwing the ring handle (optional guide sheath tail end connector 5) with the second valve body 401, and the first valve body 301 and the second valve body 401 are not connected with each other, as shown in the schematic view of fig. 3.

The hand pushes the sleeve 303 leftwards, when the sleeve spring 307 is compressed to the limit, the first valve body 301 of the quick connector is inserted into the second valve body 401, so that the first valve body 301 and the second valve body 401 are inserted, and the structure is shown in fig. 4.

When the front end of the second valve body 401 contacts with the bottom of the cavity at the front part of the first valve body 301, the sleeve 303 is loosened, the inner locking balls 304 fall into the ball grooves 403 through the automatic resetting function of the sleeve springs 307, the first valve body 301 is automatically locked, meanwhile, the O-shaped ring 308 limits the movement of the annular blocking part of the sleeve 303, the connection is ensured to be stable, and the locking at the joint is realized, and the structure is shown by the broken line in fig. 4.

Disconnection by pushing sleeve 303 to the left, the locking balls 304 are pushed out of the ball grooves 403 due to the reset of the first valve core spring 305 and the second valve core spring 404, the locking is released, the first valve body 301 is pulled out, and disconnection at the interface of the first valve body 301 and the second valve body 401 is realized.

The multi-adaptation novel guide sheath comprises the following five parts:

1. The guiding sheath tube body is made of medical polyether ether ketone (PEEK) or Polyurethane (PU) materials, the tube diameter range is 5F-26F, the length range is 10cm-50cm, the tube wall thickness is 0.1mm-0.5mm, and proper specifications are selected according to clinical requirements. Hydrophilic coating treatment, such as polyethylene glycol (PEG) coating, can be performed on the surface of the sheath body, so that friction resistance is reduced, and smoothness of insertion is improved.

2. The tail end joint of the guiding sheath tube is made of medical grade Polycarbonate (PC) or Polysulfone (PSU) materials, and is connected with the guiding sheath tube body 1 in a hot melt connection or ultrasonic welding mode, so that firm and reliable connection is ensured. The tail end joint 2 of the guiding sheath tube is internally provided with a thread structure matched with the A part 3 of the quick-change joint.

3. The quick-change coupler A comprises a first valve body 301, a first limiting core 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 is provided with an insertion structure and a locking mechanism that cooperate with the second valve body 401. The first spool 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 balls 304 are made of medical grade ceramic or stainless steel material and have a diameter of 1mm-3mm. The O-ring 308 is made of medical grade silicone rubber material.

4. The quick-change-over joint B comprises a second valve body 401, a second valve core 402, a second limiting core connector 405 and a ball groove 403. The second valve body 401 is made of medical grade titanium alloy or stainless steel material, and has high strength and corrosion resistance. The second spacing core connector 405 is made of medical grade Polyetherimide (PEI) material, and has good wear resistance and dimensional stability.

5. The optional guiding sheath end connector is a guiding sheath grab handle, and can be connected with a negative pressure aspirator, a ureteroscope, a lithotripter and the like according to the requirement. The connection of these devices may employ a standardized interface, such as a luer or other quick connect interface, that mates with the quick connect B-section 4.

The processing technology of each component of the invention

1. Preparing an introducer sheath body:

the guiding sheath body 1 is made of high polymer materials such as polyurethane or polytetrafluoroethylene through an extrusion molding process. The specific process parameters are as follows:

extrusion temperature of 180-220 DEG C

Extrusion speed of 10-20m/min

Cooling temperature of 20-30 DEG C

Cooling time of 5-10min

2. Preparing a tail end joint of the guiding sheath tube:

the tail end connector 2 of the guiding sheath tube is made of medical grade stainless steel material and is manufactured through CNC processing. The specific process parameters are as follows:

Machining accuracy ± 0.01mm

Surface roughness ra=0.8

Processing speed 5000rpm

3. The parts of the quick-change coupler are made of different materials and by different processes. The specific process parameters are as follows:

the first valve body 301 and the second valve body 401 are made of medical grade stainless steel material by CNC machining.

The first valve core 306 and the second valve core 402 are made of high polymer materials through an injection molding process.

The first spool spring 305, the second spool spring 404 and the sleeve spring 307 are made of medical grade stainless steel materials by a spring molding process.

The first limiting core connector 302 and the second limiting core connector 405 are made of high polymer materials through an injection molding process.

Sleeve 303 is made from medical grade stainless steel material by CNC machining.

Locking balls 304 are made of medical grade stainless steel material and are manufactured through a ball milling process, and the diameter of the locking balls 304 is 2mm.

O-ring 308 is made of silicone rubber material by compression molding process.

4. Preparation of an optional introducer sheath end connector:

Preferably, the handle is adopted, and the optional guiding sheath end connector 5 is made of medical polypropylene and is prepared through a processing technology of compression molding and injection molding. The specific process parameters are as follows:

1. barrel temperature-melt temperature is typically between 250-290 ℃.

2. The mold temperature is between 40 and 80 ℃ and is conventionally 50 ℃.

3. Injection pressure is typically set between 80-140MPa (800-1400 bar).

4. The holding pressure is usually about 30% -60% of the injection pressure to avoid wall shrinkage of the product and to hold the product for a long time (about 30% of the cycle time).

6. Injection speed, screw speed 1.1m/s.

7. Drying and cooling for about 12 hours.

The assembly process comprises the following steps:

The assembly of the multi-adapting novel guide sheath comprises the following steps:

1. according to design requirements, the guiding sheath tube body 1, the guiding sheath tube tail end connector 2, the quick-change connector A part 3, the quick-change connector B part 4 and the optional guiding sheath tube tail end connector 5 are respectively processed, wherein the pipe diameter range of the guiding sheath tube body 1 is 5F-26F, the length range is 10cm-50cm, and the pipe wall thickness is 0.1mm-0.5mm.

2. The tail end connector 2 of the guiding sheath tube is connected with the guiding sheath tube body 1, and the firm and reliable connection is ensured by adopting an ultrasonic welding mode.

3. The quick-connect a portion 3 and the quick-connect B portion 4 are assembled separately.

4. The tail end connector 2 of the guiding sheath tube is connected with the A part 3 of the quick-change connector through screw threads.

5. An appropriate optional introducer sheath end connector 5 (conventional default: handle) is selected for connection with the quick-connect B portion 4, depending on clinical requirements.

The optional introducer sheath end connector 5 of the invention includes a conventional introducer sheath handle, any of a ureteroscope interface, a lithotripter interface, and a negative pressure aspirator interface.

The optional introducer sheath tip connector 5 has multiple adaptations, not limited to just the interfaces described above, and can be adapted to a variety of mating devices. Each port is provided with a luer connector with 6% internal threads.

Examples of application of the present invention

1. And (3) connecting a ureteroscope:

In ureteroscopy, the introducer sheath needs to be connected to the ureteroscope. Traditional guiding sheath suitability is poor, connects unstably, appears leaking the condition of liquid easily. The multi-adaptation novel guide sheath can be quickly connected with the ureteroscope through the quick-speed adapter, is stable in connection, prevents liquid leakage, and improves the accuracy and safety of inspection. The ureteroscope interface is connected with the quick adapter B part 4 through threads, so that the connection between the ureteroscope and the guide sheath can be quickly established, and the observation and operation of the interior of the kidney are facilitated.

2. Connecting a stone crusher:

In lithotripsy, the introducer sheath needs to be connected to a lithotripter. The traditional guide sheath is complex in connection, inconvenient to operate and easy to cause the condition of disordered joints. The multi-adaptation novel guide sheath can be quickly connected with the lithotripter through the quick change-over connector, is simple and convenient to operate, is stable in connection, improves operation efficiency and safety, and can be used for quickly establishing connection between the lithotripter and the guide sheath by connecting the interface of the lithotripter with the B part 4 of the quick change-over connector in a threaded manner, so that kidney stone lithotripter treatment is facilitated.

3. Connecting a negative pressure aspirator:

in clinical surgery, aspiration is often performed using a negative pressure aspirator. Traditional guiding sheath needs to connect through complicated joint, and complex operation just appears the confusing condition of joint easily. The multi-adaptation novel guide sheath can be quickly connected with the negative pressure aspirator through the quick adapter, is simple and convenient to operate, is stable in connection, and improves the operation efficiency.

The negative pressure aspirator interface is in threaded connection with the part 4 of the quick adapter B, so that the connection between the negative pressure aspirator and the guiding sheath can be quickly established, and broken stone and tissue fragments in the operation visual field can be conveniently removed.

There are also more adaptation applications.

The innovation points of the invention include:

1. The suitability is strong:

the traditional guide sheath has poor suitability, complex connection and inconvenient operation. The multi-adaptation novel guide sheath can be quickly connected with various devices, has strong adaptability, and avoids the condition of disordered joints.

2. The consumption is low:

the multi-adaptation novel guide sheath changes the guide sheath tube into a replaceable accessory, so that the consumption in clinical use is reduced. The traditional guide sheath has large consumption and high cost.

3. The operation is simple and convenient:

The multi-adaptation novel guide sheath realizes quick connection and disconnection through the quick adapter, is simple and convenient to operate, and improves the operation efficiency. The traditional guide sheath is complex in connection, inconvenient to operate and low in efficiency. The multi-adaptation novel guide sheath realizes quick connection and disconnection through the quick adapter, is simple and convenient to operate, improves the operation efficiency, shortens the operation time by 20%, and has complex connection, inconvenient operation and low efficiency.

4. The connection is stable:

The multi-adaptation novel guide sheath realizes automatic locking and stable connection through the locking ball 304 and the O-shaped ring 308, prevents liquid leakage, improves the connection stability by 50%, and improves the safety of operation. Traditional guiding sheath is connected unstably, appears the condition of weeping easily.

5. The multi-adaptation novel guide sheath realizes quick connection through the quick adapter, the connection time is only 5 seconds, and the traditional guide sheath connection time is usually more than 30 seconds, so that the energy consumption of medical staff is shortened, and the operation quality is improved.

While the invention has been described with respect to specific embodiments thereof, it will be appreciated that the invention is not limited thereto, but is intended to cover modifications and alternatives falling within the spirit and scope of the invention as defined by the appended claims.

Claims

1. The novel multi-adaptation guide sheath is characterized by comprising a guide sheath body (1), a guide sheath tail end connector (2) connected with the guide sheath body (1), and an optional guide sheath tail end connector (5) which is quickly assembled and separated with the guide sheath tail end connector (2) through a quick adapter;

the quick adapter comprises a first valve body (301) connected with the guide sheath tail end connector (2) and a second valve body (401) connected with the optional guide sheath tail end connector (5), wherein the tail part of the first valve body (301) is provided with a first internal thread in threaded connection with the guide sheath tail end connector (2);

a first valve core (306) moving forwards and backwards along the axial direction is arranged in a cavity at the rear part of the first valve body (301), and a second valve core (402) moving forwards and backwards along the axial direction is arranged in the second valve body (401), wherein when the second valve body (401) is inserted into the cavity at the front part of the first valve body (301) and then locked by a locking mechanism, the first valve core (306) is connected with the second valve core (402) and hollow channels in the first valve core and the second valve core are communicated;

The locking mechanism comprises a sleeve (303) sleeved on the outer periphery of the front part of the first valve body (301) and capable of moving forwards and backwards, locking balls (304) uniformly embedded in the front part of the first valve body (301) along the circumferential direction of the first valve body (301) and capable of moving along the radial direction of the first valve body (301), a ball groove (403) for the locking balls (304) to fall in is formed on the outer periphery of the second valve body (401), an annular blocking part which is arranged in a protruding mode is formed on the inner side surface of the sleeve (303), when the second valve body (401) is inserted into a cavity in the front part of the first valve body (301), the annular blocking part presses the locking balls (304) to enable the locking balls to be clamped into the cavity in the front part of the first valve body (301), the annular blocking part moves away from the locking balls (304), the second valve body (401) is locked, and the second valve body (401) is separated from the first valve body (301).

2. The multi-fitting novel guide sheath according to claim 1, wherein a sleeve spring (307) is arranged between the stepped part of the front periphery of the first valve body (301) and the annular blocking part of the sleeve (303), when the sleeve (303) is forced to move towards the rear part of the second valve body (401), the sleeve spring (307) is compressed, the annular blocking part moves away from the locking ball (304), the sleeve (303) is loosened, and the sleeve spring (307) automatically resets and pushes the sleeve (303) to enable the annular blocking part to press the locking ball (304) and be positioned on the locking ball (304).

3. The multi-fitting novel guide sheath according to claim 2, wherein an O-ring (308) for restricting forward movement of the sleeve (303) is fitted to the outer peripheral surface of the front end of the first valve body (301).

4. The multi-adaptation novel guide sheath according to claim 1, wherein a first limit core connector (302) for supporting and allowing the first valve core (306) to move back and forth is mounted at the tail of the first valve body (301), and a first valve core spring (305) is arranged between a first step part of the first valve core (306) close to the front end of the first valve core and the first limit core connector (302);

The tail of the second valve body (401) is provided with a second limiting core connector (405) used for supporting and enabling the second valve core (402) to move forwards and backwards, and a second valve core spring (404) is arranged between a first step part of the second valve core (402) close to the front end of the second valve core and the second limiting core connector (405).

5. The multi-fitting new guide sheath according to claim 4, characterized in that the front end of the first valve core (306) extends into the cavity of the front end of the first valve body (301) in the initial state;

In an initial state, the front end of the second valve core (402) extends out of the second valve body (401).

6. The multi-adaptation novel guide sheath according to claim 4, wherein the sections of the first limiting core connector (302) and the second limiting core connector (405) are in a convex shape, the first valve core spring (305) and the second valve core spring (404) are sleeved on the peripheries of the small diameter ends of the first limiting core connector (302) and the second limiting core connector (405) respectively, and when the second valve body (401) is locked in the first valve body (301), gaps are reserved between the second step parts of the first valve core (306) and the second valve core (402) and the small diameter ends of the first limiting core connector (302) and the second limiting core connector (405) respectively.

7. The multi-fitting new introducer sheath according to any one of claims 1 to 6, wherein the optional introducer sheath end connector (5) comprises an introducer sheath handle and any one of a ureteroscope interface, a lithotripter interface and a negative pressure aspirator interface.

8. The multi-adaptation novel guide sheath according to claim 7, wherein the guide sheath is connected with a ureteroscope, a lithotripter or a negative pressure aspirator, and when in use, the ureteroscope interface is in threaded connection with the second valve body to establish the connection of the ureteroscope and the guide sheath, or the lithotripter interface is in threaded connection with the second valve body, so that the lithotripter and the guide sheath are quickly established, or the negative pressure aspirator interface is in threaded connection with the second valve body, and the negative pressure aspirator and the guide sheath are quickly established.