48 results about "Outer Cannula" patented technology

The application discloses an ear-nose-throat department rhinitis and rhinosinusitis nasal cavity flushing device, and belongs to the technical field of medical instruments, which comprises a flushing liquid injection mechanism and an inner-outer cannula breathing mechanism which are used in cooperation, wherein the flushing liquid injection mechanism comprises a liquid storage bag and a first conducting pipe, the first conducting pipe is connected with the liquid storage bag through a liquid delivery pipe, a nasal cavity liquid supply assembly and a nasal cavity foreign matter cleaning assembly are arranged on the first conducting pipe, and the nasal cavity liquid supply assembly is used in cooperation with the liquid delivery pipe; the inner-outer cannula breathing mechanism comprises a second conducting pipe, and a flushing liquid discharge assembly and a positioning assembly are arranged on the second conducting pipe; through the arrangement of the flushing liquid injection mechanism and the inner-outer cannula breathing mechanism, the device can effectively clean the nasal cavity of a patient, meets the demand of different cleaning modes, and has the characteristics of good cleaning effect, simple and convenient use and low manufacturing cost.

The application discloses a puncture needle device for nephrology and a sampling method, and belongs to the technical field of medical devices. The device comprises an outer sleeve needle body, an inner core assembly, a driving control assembly and a sampling structure. The inner sleeve needle body is internally provided with a sampling cavity and a sampling cavity which are independent of each other, the inner core assembly is coaxially assembled in the sampling cavity in a detachable manner, and is used for carrying out the acquisition, cutting and containing of tissues. The driving control assembly is in transmission cooperation with the inner core assembly, and provides driving force for the inner core assembly to complete the sampling action. The sampling structure is movably arranged in the sampling cavity, and is used for receiving and taking out the inner core assembly after the sampling is completed. The application adopts a pure mechanical structure design, keeps the outer sleeve needle body fixed after single puncture is in place, and realizes multiple continuous sampling only by replacing the inner core assembly, so that the defects of low sampling efficiency, easy sample damage, high risk of patient injury and the like of the existing puncture needle are solved, and the application has the advantages of convenient operation, safety and reliability.

This utility model discloses a multi-segment gradient telescopic needle gauge, including a housing handle with a blind hole at one end, within which a needle gauge assembly is housed. The needle gauge assembly includes an outer tube, inside which multiple inner tubes are sequentially fitted. The inner tubes can extend and retract axially within the outer tube, and the outer tube can also extend and retract axially within the housing handle. A first and second sliding groove are axially offset on the side wall of the housing handle, and a connecting groove is provided on the side wall of the housing handle. A locking block is provided on the side wall of the outer tube, with one end extending out of the housing handle. The locking block can slide within the first and second sliding grooves, and can abut against the end faces of the first and second sliding grooves respectively. A single needle gauge in this utility model can cover multiple sizes, reducing changeover time and making it easy to carry. Furthermore, it eliminates the need for external tools, allowing for size switching with one hand, thus improving operational convenience.

This invention discloses an anti-fog and heat-insulating puncture device for thoracoscopic surgery, belonging to the field of medical device technology. Its key technical features include: an outer sheath, with a puncture assembly on its inner wall, the puncture assembly including a puncture needle core that slides through the inner wall of the outer sheath, a needle core handle fixedly connected to the upper end of the puncture needle core, a needle tip fixedly connected to the lower end of the puncture needle core, an outer sheath seat fixedly connected to the upper outer wall of the outer sheath, a fixing handle fixedly connected to the outer wall of the outer sheath seat, and a sealing assembly on the outer wall of the outer sheath seat. This invention achieves heat insulation through a double-layer structure formed by the outer and inner sheaths; gas circulation is formed through the cooperation of the air inlet and outlet holes, effectively expelling fog from the inner wall of the inner sheath and ensuring a clear surgical field; the sealing valve and sealing sleeve achieve internal sealing of the outer sheath to prevent gas leakage; the sealing ring is precisely positioned by positioning pins and positioning holes, and the sealing cap is stably installed by locking blocks and protruding pins, providing double sealing to prevent gas leakage and impurity entry, reducing the risk of infection.

The utility model discloses a novel metal gas cutting sleeve pipe, including fixed base, outer sleeve, arc throat pipe and arc inner tube, outer sleeve sets up on one end of fixed base, arc throat pipe sets up on the other end of fixed base, just with outer sleeve intercommunication, arc inner tube arranges in outer sleeve, fixed base and arc throat pipe, and arc inner tube is connected with outer sleeve through the limiting piece movably, the inner arc wall of arc throat pipe is equipped with oxygen delivery channel, the utility model discloses through the outer wall of arc throat pipe additional oxygen delivery channel, effectively avoided the space of oxygen pipe insertion in arc throat pipe, realizes oxygen delivery channel relative independence, can be connected with the gas duct through oxygen supply device and realizes the delivery of oxygen, to guarantee the patient to obtain enough oxygen source in the operation of breathing endoscope, and the oxygen delivery channel is equipped on the inner arc wall of arc throat pipe, can effectively save the space, avoids the discomfort of the patient wound part through the additional pipeline.

This invention relates to the field of medical water sampling technology and discloses a water sampling device, including a connecting component and a sterile container. The connecting component is used to connect a sampling port, and the sterile container is used to hold the water sample. The connecting component includes an inner tube and an outer tube, one end of which is fixedly connected to the inner tube. The inner tube and the outer tube together form a fitting area for inserting the sampling port. An annular elastic membrane is provided at the open end of the fitting area. When the sampling port is inserted into the fitting area, the annular elastic membrane is stretched and tightly covers the sampling port. This invention addresses the problem in the prior art where disinfecting the sampling port is time-consuming, affecting sampling efficiency.

The application provides a surgical bipolar electrotome, which comprises a knife head, an outer sleeve fixing base, a fixing ring, a conversion base, a fixing ring power supply wire, a knife head electrode power supply wire, a rotating ring and a handle shell, the rotating ring fixes the conversion base on the outer sleeve fixing base, so that the outer sleeve fixing base, the conversion base and the rotating ring cannot rotate relative to each other, one end of the knife head electrode power supply wire is connected with the rotating ring, and the other end is connected with the electrode of the knife head, the fixing ring is fixed with the handle shell, the fixing ring is in frictional contact with the rotating ring, one end of the fixing ring power supply wire is fixed on the handle shell, and the other end of the fixing ring power supply wire is connected with the fixing ring. The technical scheme solves the problem of winding of the internal power supply wire of the electrotome in the rotating process of the knife head, realizes 360-degree rotation of the knife head, and increases the convenience of doctors in the surgical process.

The utility model provides a radial artery angiography sleeve pipe relates to medical instrument technical field, including inner tube and sleeve pipe, inner tube includes inner tube catheter seat and inner tube tube body, sleeve pipe includes sleeve pipe catheter seat and sleeve pipe tube body, is provided with joint part on inner tube catheter seat, joint part can be connected with sleeve pipe catheter seat cooperation, when using, the inner tube tube body is worn into sleeve pipe tube body, through joint part and sleeve pipe catheter seat, can lock cooperation between sleeve pipe and inner tube, and the adaptability is good, and it is not easy to cause gas embolism or thrombus, and the end of the middle cavity is closed in locking position, and blood will not overflow, avoid affecting operation operation, when the inner tube and sleeve pipe are synchronous in superselecting the big blood vessel on the bow, and the sleeve pipe and the inner tube are separated after pointing to the target blood vessel, and under the support of guide wire and inner tube, it is superselected to the target blood vessel to the distal end, and the controllability of catheter is increased, and the difficulty of superselection is reduced.

The application provides an arthroscopic access cannula, and relates to the technical field of medical devices, which comprises an outer cannula and an inner tube installed in the middle part of the inner side of the outer cannula, the inner tube is provided as a hollow structure, a rubber plug is installed at the top of the inner tube, the bottom of the inner tube is provided with a fixing disc, and a plurality of groups of notches are formed in the middle part of the fixing disc; the outer wall of the outer cannula is provided with a fixing ring which is threadedly connected with the outer cannula, the bottom end surface of the fixing ring is provided with a rubber pad; the inner tube is threadedly installed in the middle part of the inner side of the outer cannula, the middle part of the outer wall of the inner tube is provided with an elastic sealing ring; and the plurality of groups of notches are uniformly distributed in the axial direction. In the use process, the access cannula can be implanted and installed without needing to expand the wound of a patient, so that the tearing of the wound is effectively avoided, and the setting of the fixing disc and the fixing ring enables the access cannula to be limited and fixed, so that the loosening and falling of the access cannula is avoided.

This invention relates to a device for electric field therapy of the human digestive tract, comprising: an inner guide rod, an outer sleeve, a rotating ring, and a supporting component, with an electrode array membrane spirally wound around the supporting component. When the supporting component is in a radially contracted state, the invention can be placed within the surgical instrument channel of a commonly used gastroscopy. When the supporting component is in a radially expanded state, it supports the electrode array membrane, enabling accurate electric field therapy of the upper digestive tract, particularly the inner wall of the duodenum.

The application relates to a blocking device, which comprises a first part, the first part comprising a plurality of braided wires and a convergence element, one end of the plurality of braided wires being fixed to the convergence element, the first part having at least one disc surface, the convergence element comprising a hollow and sleeved inner sleeve and outer sleeve, at least a part of the disc surface of the proximal end of the first part near the convergence element being perpendicular to the central axis of the convergence element, so that a relatively flat disc surface is formed near the convergence element. The blocking device of the application can form a relatively flat disc surface near the convergence element, that is to say, there is no obvious convex part on the surface of the disc surface, blood flow near the convergence element is prevented from forming a thrombus, and the safety of the blocking device is improved.

This invention provides a needle for bone and soft tissue tumor biopsy, comprising a needle body, a ring-taking probe, and a pusher. The needle body includes an outer cannula and a core. A channel is formed through the inner part of the outer cannula. The core is inserted into and exits the channel during puncture. The two ends of the outer cannula are a first end and a second end, respectively. The two ends of the core are a third end and a fourth end, respectively. The third end is a needle tip that extends beyond the first end, and the fourth end is used to engage with the second end to form a handle. A depth fixation device is installed on the outer wall of the outer cannula for adsorption onto the tissue surface. The ring-taking probe is inserted into the channel of the outer cannula after the core is removed to extract tissue samples. The distal inner wall surface of the ring-taking probe has a barbed structure. The pusher is inserted into the outer cannula after sample extraction to completely push out any remaining tissue from the outer cannula. This invention can improve the accuracy and comfort of bone and soft tissue tumor biopsy, reduce the sampling failure rate during puncture, and increase the sample volume.

This invention relates to a urinary catheter for post-prostatectomy, comprising an outer sheath, a catheter disposed inside the outer sheath, and an expansion component disposed on the surface of the outer sheath. Compared with the prior art, this invention, through the protruding structure on the surface of the balloon, allows the doctor to achieve hemostasis on the wound after prostatectomy via the balloon. The protruding structure can closely fit the uneven interior of the wound after surgery, resulting in better hemostasis compared to the smooth balloon surface in the prior art. At the same time, since the interior of the protrusion is connected to the interior of the balloon, the expansion size of the protrusion during the balloon inflation phase can be affected by the unevenness of the wound surface, avoiding excessive pressure on the post-operative wound area. In addition, the design of multiple sub-protrusions can increase the contact area after the balloon is filled with water or air, resulting in better compression hemostasis.

This utility model relates to the field of plastic fastener technology, and more particularly to a snap-fit ​​plastic part that is easy to assemble. The snap-fit ​​plastic part includes an outer tube, an expansion head, a guide assembly, a trapezoidal push block, and a drive assembly. An inner tube is installed inside the outer tube, and an expansion head for easy assembly is installed at the end of the outer tube. A guide assembly is installed between the inner tube and the expansion head. The snap-fit ​​plastic part provided by this utility model significantly reduces the initial alignment difficulty through the synergistic effect of the expansion head and the guide assembly. The expansion design of the expansion head increases the inlet area of ​​the outer tube, allowing the guide rod of the inner tube to enter the guide groove under the guidance of the expansion ramp even with slight angular deviations. The smooth transition between the tapered guide groove and the slide groove achieves automatic centering of the inner tube, completing pre-positioning without precise manual adjustment, shortening the single assembly time, significantly improving assembly efficiency, and reducing labor costs.

The present application relates to the technical field of medical devices, in particular to a dilatable sheath type endoscopic biliary mud-like stone removal device, which comprises an outer sleeve, a flushing unit, a hollow working sheath, a spiral inner core assembly, a rotary drive unit and a vibration generating unit. The flushing unit, flexible conducting rod, spiral blade and vibration generating unit work together to continuously discharge the biliary mud-like stones. The positive pressure of the flushing liquid forms a forward flow in the bile duct, and the axial conveying force of the spiral blade discharges the stones in the outward direction, effectively avoiding the stones being pushed to the distal end of the bile duct, improving the complete removal rate of the stones, overcoming the problems of the existing dredging device, such as easy adsorption to the bile duct wall when using negative pressure suction, causing mucosal vessel rupture, and possibly sucking bacteria from the duodenal papilla into the bile duct, causing infection, and greatly improving safety.

This invention discloses a minimally invasive gripping device for a surgical robot, including surgical forceps. The forceps include an inner forceps and an outer tube fitted over the inner forceps. The device also includes a base, a slide connected to the base, a first linear drive for driving the slide to slide on the base, a second linear drive for driving the outer tube to slide along its own axis, and a rotary drive for driving the inner forceps to rotate around its own axis. The surgical forceps are connected to the second linear drive and the rotary drive via a transmission structure. The slide has a mounting base for mounting the transmission structure. The first linear drive allows the entire surgical forceps to move linearly, while the second linear drive allows the outer tube to move linearly relative to the inner forceps, thus achieving gripping of objects. The rotary drive allows the inner forceps to rotate independently, resulting in more precise surgical operations and reduced damage to the surgical target.

This invention discloses a single-channel dual-media endoscope integrated device with light source and imaging functions, including a channel tube and a camera with a light source located at the front end of the channel tube. In this invention, an anchor point connection mechanism is provided on the channel tube. The anchor point connection structure includes an outer tube, an inner locking rod, an arm rod, and a torsion spring. The inner locking rod is sleeved inside the outer tube, and the front ends of the arm rod and the outer tube are rotatably connected. A slot is opened on the outer side of the arm rod to engage with the front end of the inner locking rod. A locking cannula is fixedly connected to one side of the arm rod near its free end. With the slot and the inner locking rod engaged, the arm rod and the outer tube can exist in two states: perpendicular and collinear. When collinear, it facilitates the channel tube passing through the wound on the patient's skin surface and reaching the surgical area. When perpendicular, it facilitates the locking cannula and the locking insertion pre-installed near the surgical area for fixation. This greatly reduces the time required for alignment adjustment between the channel tube and the surgical area, improves the efficiency of the surgical operation, and reduces costs.

An exchange needle device having an elongate needle structure having an elongate tube extending distally from a proximal hub and an outer cannula extending distally from the proximal hub. The outer cannula surrounds at least a proximal end region of the elongate tube forming an annular space between the outer surface of the elongate tube and the inner surface of the outer cannula. The distal end of the outer cannula is located a distance proximal to the distal opening of the elongate tube. A lubricious coating is on the outer surface of the outer cannula and the outer surface of the elongate tube extending distal to the distal end of the outer cannula, the lubricious coating covering at least a portion of the working length of the elongate needle structure. Related devices, systems, and methods of use are provided.

An overtube comprising: a connector body defining an internal lumen through which an insertion portion of an endoscope is insertable along a longitudinal axis extending through a distal opening and a proximal opening of the internal lumen; and a connection mechanism comprising: a connector movably attached to the connector body, wherein the connector is configured to define a stable, balanced first position radially distal to the longitudinal axis, and to move from the stable, balanced first position to a second position radially closer to the longitudinal axis than the first position by a radial force, and wherein, in the second position, the connector is configured to engage the insertion portion to limit relative movement of the connector body and the insertion portion along the longitudinal axis while allowing the connector body to rotate relative to the insertion portion along the longitudinal axis by a driving force.

This application provides a ureteral guiding sheath, belonging to the field of medical device technology. The ureteral guiding sheath includes a connected sheath tube and a connector. The sheath tube includes an inner liner and an outer sheath, with the outer sheath fitted over the outer side of the inner liner. The gap between the inner and outer sheaths forms a water injection chamber. The inner liner has independent first and second cavities. The connector includes a connected main tube and a branch tube. The main tube has independent first and second channels. The first channel communicates with the first cavity to serve as a negative pressure chamber, and the second channel communicates with the second cavity to serve as an instrument cavity. The branch tube communicates with the water injection chamber. The ureteral guiding sheath provided by this application has independent water injection, instrument cavity, and negative pressure chamber. When removing stones, it is not necessary to remove the medical device to create space, making operation convenient, saving operation time, and reducing patient discomfort. The water injection chamber is not affected by the medical device, the water injection time is easy to control, and the clarity of the medical device's field of vision is not affected by water injection or stone removal.

The application relates to the technical field of medical devices, in particular to an ultrasonic probe. The ultrasonic probe comprises an inner sleeve and an outer sleeve with a tubular shell, the tubular shell is a hollow structure with at least one open end, the inner sleeve and the outer sleeve can be inserted into the patient's anal rectum separately or jointly, an ultrasonic transducer is arranged on the inner sleeve or the outer sleeve, the inner sleeve is rotatable and detachably sleeved in the inner chamber of the outer sleeve, the outer periphery of the inner sleeve is in gap cooperation with the inner periphery of the outer sleeve; the corresponding open ends of the inner sleeve and the outer sleeve are provided with a magnetic attraction coupling structure without a lock buckle, the magnetic attraction coupling structure keeps the inner sleeve in the inner chamber of the outer sleeve through magnetic attraction force. In the application, the ultrasonic probe realizes the effect of ultrashort distance and wide angle through the magnetic attraction coupling structure without a lock buckle of the inner and outer sleeves, the taper sleeve structure and the optimized included angle design, the operation distance is shortened to 65 mm, and the "chopstick effect" is avoided.

The present application belongs to the field of artificial pneumothorax making device, and particularly relates to an artificial pneumothorax puncture device for chest wall puncture and establishment of a pleural cavity channel. In view of the defects that the existing puncture needle is easy to puncture the visceral pleura, the position of the needle tip is ambiguous, iatrogenic pneumothorax, gas embolism and other complications are easily caused, and the puncture needle cannot be adapted to high-risk patients such as emphysema, the present application adopts a coaxial structure, designs a blunt and smooth pneumothorax needle, and / or increases the contact area of the front end of the outer sleeve tube with the visceral pleura, cooperates with the side wall vent hole to realize direct positioning of the pleural cavity negative pressure, integrates double operation paths, and is matched with frosted development, scale marking and other optimizations. The device can greatly reduce the risk of complications, expand the applicable population, shorten the positioning time, balance the operation flexibility and accuracy, and effectively improve the safety and efficiency of the artificial pneumothorax operation.

A wellhead assembly (10) comprising a wellhead (12) having a tubular wellhead body (14, 14') having an outer surface, a wellhead casing (16) extending from a first end of the wellhead body (14, 14'), the wellhead casing (16) having an outer surface and a proximal end (16a) and a distal end (16b) relative to the wellhead body (14, 14'), and the wellhead assembly comprising a tubular outer casing (24) having an inner surface, there being an annular space (30) between the inner surface of the outer casing (24) and the outer surface of the first end of the wellhead body (14, 14') and the outer surface of the wellhead casing (16), wherein the system further comprises a solid cement liner extending from the inner surface of the outer casing (24) into the annular space (30), and a fluid sleeve extending from the outer surface of one or both of the first end of the wellhead body (14, 14') and the wellhead casing (16) into the annular space (30).

The application relates to a turning tool for enhancing the rigidity of a flexible cylindrical part, and relates to the field of turning tool technologies, which comprises an inner support pipe arranged in the inside of the flexible cylindrical part and a opening mechanism for opening the inner support pipe, and a first opening is arranged on the inner support pipe. An outer sleeve pipe is arranged on the outside of the flexible cylindrical part, a second opening is arranged on the outer sleeve pipe, and the outer sleeve pipe is used for being clamped by a lathe. The application realizes the opening of the inner support pipe through the opening mechanism, so that the inner support pipe supports the inside of the flexible cylindrical part, thereby enhancing the rigidity of the flexible cylindrical part. Through the synergistic effect of the inner and outer structures, the stability of the flexible cylindrical part in the turning process is effectively improved, the problems of deformation and shaking caused by insufficient rigidity are avoided, and the machining precision and efficiency are significantly improved.

A drill component is provided that enables determining the drill component's insertion depth into bone via direct measurements. The direct measurements help provide more consistently accurate insertion depth measurements as compared to typical insertion depth measurement methods that indirectly determine insertion depth using cannulas outside of the bone. The determined insertion depth corresponds to an implant size or length that a surgeon should select for a procedure. The drill component includes a shaft having an insertion end that includes multiple indications or markings that are visible on radiographic or fluoroscopic images. From one or more captured radiographic or fluoroscopic images of the drill component advanced into bone, a surgeon may count a quantity of indications or markings of the drill component on the one or more radiographic or fluoroscopic images to determine the drill component's insertion depth into the bone.

The application provides a catheter sheath with postoperative hemostasis function, comprising: an outer sleeve, a blocking structure arranged outside a distal end of the outer sleeve, and a water dissolving structure arranged outside the distal end of the outer sleeve and connected with the blocking structure; the water dissolving structure is arranged between the outer sleeve and the blocking structure in a radial direction, or the water dissolving structure is arranged on one side of the blocking structure in a direction in which the blocking structure is withdrawn from the blood vessel along the outer sleeve; when the water dissolving structure is dissolved in blood, a height difference in the radial direction is formed between the blocking structure and the outer sleeve, so that the blocking structure is separated from the outer sleeve when the outer sleeve is withdrawn from the blood vessel. Through the application, automatic hemostasis of the catheter sheath during withdrawal from the blood vessel is realized.

This invention discloses a cerebral thrombosis removal device, comprising an outer cannula, a first catheter, a thrombus fragmentation structure, and an artificial blood vessel. The proximal and distal ends of the outer cannula respectively form a first inlet and a first outlet communicating with a first channel. The first catheter is disposed within the first channel. The thrombus fragmentation structure includes a second catheter and a fragmentation section located distal to the second catheter. The second catheter is movably disposed within the first catheter and can extend from the first outlet to fragment the thrombus at the target lesion site. An aspiration channel is formed inside the second catheter, with its distal opening located near the fragmentation section for aspirating the fragmented thrombus fragments. The artificial blood vessel includes a third catheter, the distal end of which is used to cross the thrombus at the target lesion site to reach a distal blood vessel and deliver blood to temporarily relieve ischemia. This invention's cerebral thrombosis removal device can extend the safe surgical time window.

This utility model discloses a disposable endometrial sampler, including an outer tube, a negative pressure suction head connected to one end of the outer tube by a thread, and a sampling bottle connected to one end of the outer tube by a thread. The negative pressure suction head and the sampling bottle are sequentially installed inside the outer tube. A core rod is inserted inside the outer tube, and a silicone ring is provided at the end of the core rod inside the outer tube. The core rod pulls the silicone ring to move inside the outer tube, so that endometrial tissue is sucked into the outer tube through the negative pressure suction head. This utility model uses the sampling bottle to directly obtain endometrial tissue inside the outer tube, reducing the loss and contamination of endometrial tissue collected inside the outer tube during the testing and transfer process.

This invention discloses an indwelling needle suitable for one-handed needle insertion. The indwelling needle comprises an outer sheath and a puncture needle, the puncture needle penetrating the outer sheath with its tip longer than the sheath for puncture. The indwelling needle has a needle seat with a hollow central structure, consisting of a first needle seat connecting to the outer sheath and a second needle seat connecting to the puncture needle. The needle seat has a handle for securing both components, such as a locking structure composed of an upper and lower rubbing plate. The upper rubbing plate has a limiting groove that engages with a limiting component on the lower rubbing plate, and a stop block to facilitate thumb application. The cavity of the second needle seat contains an elastic component to assist needle withdrawal, such as a spring-connected safety plug. The first needle seat has an infusion connector, and the outer wall of the connecting section of the second needle seat or the inner wall of the first needle seat cavity has anti-slip textures or protrusions. This indwelling needle facilitates one-handed needle insertion and offers high safety.

This invention discloses a surgical robot and a method for inserting an endoscope into the surgical robot. The robot includes an outer tube with a channel for accommodating an endoscope. The endoscope is detachably connected to the outer tube. The surgical robot also includes a connecting part, which is positioned corresponding to the channel. One end of the connecting part is connected to the outer tube, and the other end is used to connect to the endoscope. When the endoscope and the outer tube are connected via the connecting part, both the endoscope and the outer tube can be operated by the same person. By using the connecting part, when using a separate outer tube and endoscope, an additional assistant is no longer needed to hold the endoscope. Compared to operating the endoscope and outer tube by different personnel, when operated by the same person, the endoscope and outer tube work together to keep the target position within the line of sight, avoiding unexpected movements such as lens shake, twisting, and shifting that may occur when an assistant holds the endoscope, thus reducing the difficulty and threshold of diagnosis and treatment.