1255results about "Surgical pincettes" patented technology

The invention discloses a thoracoscope minimally invasive cardiac surgery navigation system based on multi-modal image fusion, and the system comprises the steps: constructing a 5D heart digital twin containing an anatomical structure, a soft tissue boundary, metabolic activity and electrophysiological information through fusing preoperative CT, MRI, PET and intraoperative ultrasonic images; real-time dynamic registration is realized by using an electrocardio gating driven biomechanical model; superposing the multi-color coding navigation information to the visual field of the thoracoscope through a wavelength selection type spectroscope; a dynamic risk scoring model is constructed based on the distance, the speed and the tissue vulnerability, and three-level grading intervention is triggered; a miniature force feedback actuator is integrated to realize closed-loop control; and pre-operation virtual drilling and post-operation federal learning optimization are supported. The system remarkably improves the surgical precision and safety, and is suitable for high-difficulty heart minimally invasive surgeries such as mitral valve repair and atrial fibrillation ablation.

The present application relates to a kind of snare cutting knives for endoscope, including proximal handle, tube body assembly, cutting assembly and limiting component;Proximal handle is equipped with limiting sliding slot;The proximal end of tube body assembly is connected with proximal handle, and the distal end of tube body assembly is equipped with insulating protection tube;Cutting assembly includes cutting ring and cutting head, and cutting head is set to the distal end of cutting ring;Limiting component includes sliding part and limiting control wire, sliding part is slidably arranged in limiting sliding slot, and the proximal end of limiting control wire is fixedly connected with sliding part, and sliding part is used to drive limiting control wire axial movement;When limiting control wire moves to the distal end of insulating protection tube, cutting head and insulating protection tube abut each other and are fixed;When limiting control wire exits insulating protection tube, cutting head can continue to move relative to insulating protection tube.

Systems for producing a cosmetic effect in skin tissue of a patient are provided. The systems include a treatment module and an actuation assembly. The treatment module includes at least one coring element configured to remove a portion of skin tissue when the coring element is inserted into and withdrawn from the skin tissue. The actuation assembly is operably attached to the treatment module and can translate and / or actuate the treatment module in one or more directions relative to a surface of the skin tissue. The system can perform a microcoring procedure that provides a cosmetic effect to the patient. Methods of performing a microcoring procedure are also provided.

The embodiments of the present specification provide a clip device. The clip device comprises a sheath, a clip arm and a receiving tube, the receiving tube is releasably connected with the sheath, the clip arm comprises at least two clamping parts, the proximal ends of the at least two clamping parts are movably arranged in the receiving tube, the clip arm is opened when the clip arm moves distally relative to the receiving tube, the clip arm is closed when the clip arm moves proximally relative to the receiving tube, and the receiving tube is further used for locking the clip arm.

The invention discloses a shapeable surgical instrument with a locking device, relates to the technical field of medical instruments, and is particularly suitable for single-port endoscopic surgery. The device comprises an outer rod assembly, an inner rod assembly and a handle assembly, the outer rod can be shaped into any continuous space curve by hands and keep the shape, and the problems that a traditional straight rod instrument cannot reach a narrow operation area, and a pre-bending instrument cannot be shaped secondarily are solved. The inner rod is a flexible force transmission element, the far end is connected with the tong head assembly, and the near end is connected with the handle assembly through a detachable locking device. The locking device drives a radial movable block (a sphere or a cylinder) to clamp the inner rod through an axial movable block, so that quick disassembly and assembly are realized; and the tong head can be synchronously driven to rotate (through the rotating wheel) and open and close (through the rear handle) in cooperation with the handle assembly. According to the design, the instrument is divided into three independent parts, namely the handle, the outer rod and the inner rod, an inner hole of the outer rod is thoroughly exposed, the problem that postoperative cleaning and sterilization are not thorough is solved, and the infection risk is reduced.

The invention relates to the technical field of medical instruments, discloses a surgical instrument, and particularly relates to a shapeable surgical instrument suitable for single-port endoscopic surgery, which comprises an inner rod assembly, an outer rod assembly and a handle assembly. The outer rod assembly is made of annealed metal (such as pure copper or copper alloy), can be shaped by hands and is kept in a bent form; the inner rod is a nickel-titanium alloy multifilament or a stranded rope, and low-resistance rotation in a bending state is achieved. The handle rotating wheel drives the inner rod to rotate and is matched with the axial push-pull of the rear handle, so that the 360-degree real-time angle adjustment and opening and closing actions of the working part (forceps piece / scissors) are controlled by a single hand, and the forceps piece / scissors do not need to be taken out of a body. The problems that a traditional straight rod instrument cannot reach a narrow area, a pre-bending instrument cannot be adjusted in an operation, and an existing shaping instrument needs in-vitro angle adjustment of two hands are solved, the operation efficiency is improved, and the cleaning and sterilizing time is shortened.

The invention discloses a minimally invasive surgical instrument, and belongs to the technical field of medical instruments, the minimally invasive surgical instrument comprises a tail end tool, an operating part, a power transmission part and a connecting part, the connecting part comprises a linear part connected with the tail end tool, a bending part connected with the operating part and a spherical pair mechanism used for connecting the linear part and the bending part; the inner side of the spherical pair mechanism is provided with an inner path for smooth transition of a jaw wire, the spherical pair mechanism is provided with a rotary limiting shaft and a locking assembly, the rotary limiting shaft is configured to enable the bent part to do pitching rotation action relative to the linear part, the locking assembly comprises a locking unit and a control unit, and the locking unit is configured to provide locking force for the spherical pair mechanism. The control unit is a locking wire for connecting the locking unit and the locking operation part, and the locking operation part is reversely interlocked with the spherical pair mechanism. By adjusting the angle between the linear part and the bent part, the wrist of a doctor is located at a comfortable moving position, so that the flexibility of the wrist in the operation process is improved, and the fatigue feeling of the doctor is reduced.

A surgical anchor device for being anchored on the mucous membrane of the inner wall of the intestine, the device having a temporary anchor element presenting anchoring that can be modified in a controlled manner and having a first substantially cylindrical multiply-perforated wall presenting properties of radial elasticity whereby the first wall presents an outer diameter that can be varied in controlled manner, wherein a portion of the inner surface of the first wall is lined with an independent leakproof inner sheath having only its longitudinal ends fastened to the anchor element to define a suction chamber between the inner sheath and the first wall, the temporary anchor element being coupled to a flexible or semi-rigid tube extending outside the anchor element, an open end of the injection-suction tube opening out into the suction chamber enabling air to be injected into or sucked out from the suction chamber.

The utility model provides an endoscope clamping type arc-shaped needle puncture device, which is characterized in that a clamping control piece controls a matching space of a locking piece to be tightened, so that the locking piece is fixedly connected with an arc-shaped suture needle; the rotating control piece controls the connecting piece to rotate relative to the mounting frame from the initial position, and the connecting piece drives the arc-shaped suture needle to rotate relative to the shell so that the arc-shaped suture needle can penetrate through the mucosal tissue of the human body. After the connecting piece moves to the final position, reverse operation is carried out to enable the connecting piece to return to the initial position, and the operation is repeated for multiple times so that the arc-shaped suture needle can repeatedly rotate by 360 degrees to suture the mucosal tissue of the human body; due to the fact that the locking piece can be fixed to any position of the arc-shaped suture needle, the arc-shaped suture needle can be driven to rotate by any angle, the precision requirement for matching between the locking piece and the arc-shaped suture needle is lowered, and when the arc-shaped suture needle punctures a hard human mucosa tissue and is blocked or the rotating stroke is not enough, the arc-shaped suture needle can be driven to rotate by any angle. The locking piece can timely adjust the fixed position point so as to provide enough puncture force and rotation stroke for the arc-shaped suture needle.

According to the method and device for the endoscope to automatically follow the instruments, the electronic equipment and the storage medium, the actual focusing center and the real-time video of the endoscope are firstly obtained, then the real-time video is processed, the current operation stage is recognized, the real-time position information and the weight of each instrument in the real-time video are obtained, and the real-time position information and the weight of each instrument in the real-time video are obtained; the weights of the instruments and the corresponding position information are subjected to weighted fusion, the semantic attention center of the endoscope is obtained, and finally the focus center of the endoscope is adjusted according to the actual focus center and the semantic attention center. According to the technical scheme, the weight and the semantic attention center of each instrument are calculated by fusing the multi-dimensional features of the basic data, and finally, the logic of the focusing center of the endoscope is dynamically adjusted, so that intelligent following in a multi-instrument collaborative scene is realized, the defects of single instrument tracking and lack of semantic adaptation in the prior art are overcome, and the tracking efficiency is improved. And the flexibility and the accuracy of the automatic following instrument of the endoscope are improved.

The invention belongs to the technical field of digital surgery, and particularly relates to a hysteroscope surgical robot control method and system based on multi-modal perception. The method comprises the steps of collecting multi-modal input signals such as visual, auditory, tactile, force sense and pose signals, uniformly performing time synchronization and perception track construction, and combining semantic behavior intention inference and tactile opportunity judgment to realize multi-dimensional consistency verification of operation instructions. And after the judgment result is valid, extracting control execution parameters, driving the mechanical arm to perform accurate operation, recording an execution process and updating a control threshold value to optimize feedback performance. The system comprises an input signal acquisition module, a six-dimensional force sensor module, a semantic inference module, a modal fusion module and the like, a closed-loop structure from sensing to control is constructed, and the operation precision, the interaction stability and the safety response capability of the hysteroscope robot in an operation are remarkably improved.

The invention provides an extrascopic rotary bone grinding device for spine endoscopic surgery, and belongs to the technical field of machinery. The extra-scope rotary bone grinding device for the spine endoscopic surgery comprises a handheld part and a driving assembly fixedly connected to the outer end face of the handheld part in a locked mode, and is characterized in that the driving end of the driving assembly is in shaft connection with a shaft rod, a grinding head is integrally manufactured at the outer end of the shaft rod, a plurality of grinding teeth are arranged on the peripheral face of the grinding head in a staggered mode, and a toothed trephine is arranged at the outer end of the grinding head; the outer wall of the shaft rod is sleeved with a protective outer sleeve, a liquid injection component is arranged on the inner layer of the protective outer sleeve, a scrap capturing component is integrally manufactured between the inner wall of the protective outer sleeve and the outer wall of the shaft rod, the inner ring wall of the scrap capturing component is in interference fit with the outer wall of the shaft rod, and one end of the interior of the scrap capturing component is in clearance fit with the outer wall of the grinding head. And in cooperation with the protective outer sleeve, the liquid injection component and the debris capturing component, the accuracy, safety and convenience of bone tunnel expansion operation in the spine endoscopic surgery can be effectively improved.

Systems and methods are disclosed for providing guidance to an operator of an ultrasound device that comprises an ultrasound probe housing that contains a plurality of probes. In embodiments, images of inside a body of a patient generated in accordance with reflected ultrasonic waves from the probes are received, the images are processed to identify within the images a first body part that is a target of a needle that has been inserted into the body of the patient and a second body part that is not a target of the needle, modified images are generated based at least on the images and the identification by adding a first visual overlay over or in place of the first body part and adding a second visual overlay over or in place of the second body part, and the modified images are caused to be displayed by a display device.

The utility model provides an endoscope needle tube puncturing and suturing device. The endoscope needle tube puncturing and suturing device comprises a mounting shell, a needle tube assembly, a driving assembly and a suturing assembly. The control piece controls the driving piece to rotate relative to the mounting shell, and the driving piece drives the connecting piece to move relative to the mounting shell, so that the connecting piece drives the arc-shaped puncture needle tube to rotate relative to the mounting shell. The control piece directly drives the arc-shaped puncture needle tube to be opposite to the mounting shell through matching of the driving piece and the connecting piece. The influence of the length of the needle tube assembly and the elastic tube, the stress bending of the elastic tube and the friction between the needle tube assembly and the mounting shell on the puncture force borne by the arc-shaped puncture needle tube is small, that is, the acting force of the control piece is effectively converted into the puncture force of the arc-shaped puncture needle tube through the matching of the driving piece and the connecting piece; and the arc-shaped puncture needle tube has enough puncture force, so that the arc-shaped puncture needle tube can quickly penetrate through human tissues, and the suture efficiency and implementation reliability of the product are improved.

The utility model discloses an anastomat nail box base, and relates to the field of medical instruments, the anastomat nail box base comprises a base body, the top of the base body is rotatably provided with a nail abutting plate used for clamping tissue of a patient, the bottom of the nail abutting plate is fixedly connected with a cutter, and the middle of the base body is provided with a broken groove used for reducing tissue damage; contact plates are inserted in the positions, on the two sides of the broken groove, of the base body, a plurality of first communicating grooves are formed in the tops of the two contact plates, and second communicating grooves are formed in the positions, located in the first communicating grooves, of the upper end face of the base body; an interaction cavity communicated with the multiple second communicating grooves is formed in the base body, a synchronous plate used for fixing nail bodies is movably arranged in the interaction cavity, a nail box is arranged at the position, located at the bottom of the synchronous plate, in the interaction cavity in an inserted mode, release openings are formed in the positions, located in the multiple second communicating grooves, of the top of the nail box, and multiple pop-up anastomosis nails are arranged in the multiple release openings. The nail box can fix the nail body in multiple directions to prevent looseness, and meanwhile the nail box is easy to install and operate and convenient to replace.

The invention discloses a lithotomy and lithotripsy handle and a lithotomy and lithotripsy integrated medical instrument, and belongs to the technical field of medical instruments, the lithotomy and lithotripsy handle comprises an operation part and a guide sheath tube capable of collecting a mesh basket, the guide sheath tube is installed on the operation part, the operation part is provided with an operation device, and the operation device at least has a lithotomy mode and a lithotripsy mode; the lithotomy and lithotripsy integrated medical instrument comprises a mesh basket and a lithotomy and lithotripsy handle. In the calculus removing mode, the operation device can convert external force applied by an operator into driving force for driving the mesh basket to move in the axial direction of the guiding sheath tube, and the mesh basket is driven to be released or recycled through the guiding sheath tube so that calculus removing can be achieved. In the lithotripsy mode, the operation device can convert external force applied by an operator into lithotripsy force for driving the mesh basket to be collected to the guiding sheath tube in the axial direction, so that the mesh basket collects the lithotripsy under the constraining force of the guiding sheath tube. The lithotripter has the advantages that lithotripsy can be carried out during lithotripsy in the bile duct and during lithotripsy, a lithotripsy handle does not need to be externally connected independently, economic cost is low, operation is easy, and the risk of cross infection is avoided.

The invention provides a multi-degree-of-freedom double-arm skin flap retraction robot which comprises a multi-source sensing system, driving systems, a supporting frame and at least two skin flap supporting arms, the driving systems are installed on the supporting frame, each skin flap supporting arm is connected with one driving system, and the driving systems are installed on the supporting frame. The driving system drives the skin flap supporting arm to advance, retreat, lift and pitch, and the multi-source sensing system comprises a spatial position and posture sensing unit and a force touch sensing unit. Each skin flap supporting arm is provided with a spatial position and posture sensing unit and a force touch sensing unit which can monitor the configuration change and the stress state of the skin flap supporting arm in real time. The skin flap retractor has the advantages that dynamic supporting and retraction of skin flap tissue can be achieved, it is guaranteed that the surgical field is fully exposed, meanwhile, single-point tissue compression and trauma risks caused by a traditional retractor are reduced, manpower resources are saved, operation safety is guaranteed, and retraction efficiency and stability are improved.

A system and method for modifying a heart valve utilizing a leaflet crossing tool and a cutting element.

The invention relates to the technical field of medical equipment, in particular to an integrated bendable multifunctional multichannel endoscopic treatment auxiliary device which comprises an outer tube, a main channel for an endoscope to pass through and a plurality of auxiliary channels for accessories to pass through are arranged in the outer tube in the length direction, and a limiting ring is mounted at the lower end of the outer tube; a plurality of separating strips used for separating the auxiliary channels are arranged on a protrusion of the limiting ring, a communicating hole communicated with the inside and the outside is formed in the position, close to the upper end, of the side wall of the outer pipe, and the upper ends of the auxiliary channels penetrate through the communicating hole to be arranged on the outer side of the outer pipe. By arranging a plurality of auxiliary channels, a plurality of surgical operation tools can be conveniently added to serve as accessories, so that the problems that in the surgical operation process, the accessories are frequently exchanged to complete various surgical steps, the operation efficiency is affected, and the operation risk is increased can be solved.

The invention relates to the technical field of minimally invasive treatment surgical medical instruments, and discloses a magnetic anchoring traction device, which comprises an outer magnetic mechanism, an inner magnetic mechanism, an inner magnetic mechanism, a traction mechanism, a traction mechanism and a traction mechanism, and is characterized in that the outer magnetic mechanism is configured to be arranged outside an organism and comprises an outer magnet with magnetism or capable of generating magnetism; the inner attraction body is made of a material which does not have magnetism and can be magnetized close to the magnet, the inner attraction body is configured to be arranged inside a living body, and the upper end of the inner attraction body is used for facing the lower end of an outer magnetic mechanism located outside the living body, so that the inner attraction body and the outer magnet attract each other; and the upper end of the tractor is connected with the lower end of the inner aspirator, and the lower end of the tractor comprises a connecting part and is used for dragging tissues or organs in a living body or is connected with an in-vivo catheter. By means of the internal attraction body which is not magnetic and is made of a material which is close to the magnet and can be magnetized, the influence of magnetic force on an instrument in a living body can be reduced, high-temperature disinfection of the internal attraction body is facilitated, and therefore the safety of minimally invasive treatment surgery is improved.

An endoscope treatment instrument may comprise a sheath, a conductive rod extending from a distal end of the sheath, an electrode connected to a distal end of the rod, an insulator positioned distally relative to the electrode; and an insulating element covering at least part of an outer circumferential surface of the rod.

A fiber optic treatment tool system according to the present invention comprises: a treatment tool that treats tissue of an observation target site; a light-emitting unit that emits light in a wavelength band that excites a fluorescent reagent contained in a drug bound to the observation target site; a light guide part that is configured using an optical fiber and that guides light between one end and the other end thereof; a light-receiving unit that detects return light from the treatment tool or the observation target site incident on the light guide part; and a control unit that controls the intensity of the light emitted by the light-emitting unit. The light guide unit has one end located at the end of the treatment tool on the observation target site side and the other end connected to the light-emitting unit and the light-receiving unit. The control unit reduces the light emission intensity of the light-emitting unit when the intensity value of the return light acquired from the light-receiving unit is equal to or greater than a preset threshold value.

A spinal endoscope and a driving apparatus for a surgical instrument thereof, relating to the technical field of surgery. A rotating platform (12) of the driving apparatus is rotatably mounted on a base (13), and an encoder (8) is mounted at one end of the base (13). A first motor (10) is configured for driving the rotating platform (12) to rotate. A guide rail (11), a second motor (17), and a third motor (14) are all fixedly mounted on the rotating platform (12). The third motor (14) is configured for driving an endoscope lead screw (15) to rotate. An endoscope clamping apparatus (2) is in a screw fit with the endoscope lead screw (15) and can slide along the guide rail (11). An endoscope (3) is fixedly mounted on the endoscope clamping apparatus (2). A working sleeve (1) is fixedly mounted on the base (13), and the central axis coincides with the rotation axis of the rotating platform (12). The second motor (17) is configured for driving an actuator lead screw (16) to rotate. An actuator driving platform (6) is in a screw fit with the actuator lead screw (16). The actuator driving platform (6) is mounted on the guide rail (11) in a sliding fit manner and configured for mounting an actuator (5) and a motor driving module (7). The actuator (5) and a working channel of the endoscope (3) are coaxially arranged.

An example assembly for use with a vacuum system and an esophageal positioning device esophageal positioning device includes an introducer, in which the esophageal positioning device includes a first segment and a second segment. The second segment is pivotally connected to the first segment. A gap portion of an outer tube of the introducer is defined along a longitudinal axis between a tube tip of the introducer and the distal end of the second segment of the esophageal positioning device when the esophageal positioning device is disposed within the introducer. The gap portion defines one or more radial vacuum holes.

The invention relates to an ophthalmic surgical instrument comprising a handling unit, a surgical module provided on the handling unit, and a shaft at least partially surrounding the surgical module, wherein the surgical module and the shaft are movable relative to each other. The handling unit further comprises a guide element arranged at a distal end of the handling unit. The handling unit includes an actuating unit with a plurality of actuating arms and a drive unit for moving the shaft back and forth relative to the guide element through the central bore of the guide element, wherein the drive unit comprises an annular element on a proximal side of the guide element, the distal ends of the actuating arms being pivotably connected to the annular element in order to move the annular element toward the guide element.

A cell transplanting kit includes a transplant including a cell group and a cell transplanting device. The cell transplanting device includes a needle-shaped portion that extends in a shape of a tube, and an aspiration portion configured to aspirate an interior of the needle-shaped portion. The needle-shaped portion is configured to attract the transplant by aspiration by the aspiration portion and take the transplant into the interior. The aspiration portion is configured to create an aspiration pressure in a range of −100 kPa to −0.1 kPa. The transplant includes a protection portion in a form of a gel covering at least a part of the cell group. The transplant has an outer diameter that is greater than or equal to a minimum value of the inner diameter of the needle-shaped portion. The protection portion has a jelly strength of greater than or equal to 100 g.

The utility model provides a ureter sheath convenient for adjusting rotation of a pipeline. The ureter sheath comprises a Y-shaped main body, a guide sheath tube, a guide sheath seat, an expander seat and an expander tube body, the dilator tube body is connected with the dilator seat, and the dilator seat is embedded into the Y-shaped main body; the guide sheath tube and the guide sheath seat are integrally formed, the Y-shaped main body is provided with a sealing gasket, and the guide sheath seat is clamped with the Y-shaped main body through the sealing gasket; and when the Y-shaped main body is rotated, the Y-shaped main body drives the guide sheath seat to rotate at the same time through the sealing gasket. By arranging the sealing gasket, the guiding sheath tube can be driven to rotate by rotating the Y-shaped main body, so that the guiding sheath base is moved or operation gestures are replaced, and the problems of twisting, winding and the like of a negative pressure drainage bottle connecting tube do not need to be considered.

This invention discloses a variable stiffness flexible surgical robot platform based on a lock-shaped structure, comprising a drive unit and an access carrier. The drive unit controls the access carrier to switch between a flexible state and a rigid state via a drive rope and a variable stiffness rope. Multiple joints of the access carrier are sequentially hinged together by joint connectors, allowing relative rotation. Each joint connector includes a connecting shaft, a spring, and an engagement end cap. One end of the spring is bonded to a joint ear plate, and the other end is bonded to the inside of the engagement end cap, with the inside of the engagement end cap embedded in a groove on the ear plate. The mating surfaces of the connecting shaft and the engagement end cap have meshing teeth. In the flexible state, the engagement end cap is supported by the spring, and the teeth on the connecting shaft and the engagement end cap are in a separated state, allowing adjacent joints to rotate freely. In the rigid state, the variable stiffness rope engages the teeth on the connecting shaft and the engagement end cap, converting the tension of the variable stiffness rope into a resisting torque between the joints, thus making the access carrier rigid.

The utility model provides an arthroscopic surgery liquid collecting bag capable of preventing liquid from overflowing, which is characterized in that the back surface of the liquid collecting bag is connected with a drape, the back surface of the liquid collecting bag is provided with a liquid collecting opening, the front surface of the liquid collecting bag is provided with an unfolding part, the top of the unfolding part is fixedly provided with an adjustable aluminum strip capable of supporting the unfolding part, and the edge of the unfolding part is fixedly provided with a fixed aluminum strip in a surrounding manner. The fixed aluminum strip and the adjustable aluminum strip jointly keep the unfolding part to form a three-dimensional liquid collecting area; the lower end of the liquid collecting bag is provided with a liquid discharging pipe, the liquid discharging pipe is provided with a sealing plug, and the sealing plug is matched with the inner diameter of an outer port of the liquid discharging pipe; a plurality of reinforcing patches are fixed to the top end of the back face of the liquid collecting bag and matched with the hole towel in an adhering mode. By improving the liquid collecting structure, providing a flexible discharging mechanism and enhancing the stability of the bag body, the environment cleanliness, the operation stability and the equipment use convenience in the operation process are improved, and the use effect is good.

The utility model relates to a neurosurgery guiding device negative pressure control device which is applied to the technical field of medical instruments and comprises a guiding device body, a suction pipeline and a plugging mechanism, the suction pipeline is arranged on the guiding device body in a penetrating mode, and an inner cavity of the suction pipeline is a suction channel; an air hole is formed in the annular side of the suction pipeline and is communicated with the suction channel; the plugging mechanism comprises a movable piece and a plug arranged on the movable piece, a sliding hole is formed in the guider body, part of the movable piece extends to the outer side of the guider body, the movable piece is arranged at the sliding hole in a sliding mode, and the plug and the air hole are oppositely arranged and matched; when the movable part slides on the guider body, the plug gets close to or away from the air hole. When the guiding device is used, as long as it is ensured that negative pressure equipment is always started, the plug is controlled to be close to or away from the air hole by shifting the part, extending to the outer side of the guiding device body, of the movable piece through fingers, a suction pipeline can be opened or closed in time, and the convenience of a doctor in an operation is further improved.