159 results about "Operative time" patented technology

The utility model provides a strutting test mould, including holding rod, actuating component and two oppositely arranged bracing plate, holding rod includes the near end block that is provided at the far end and axial through inner cavity, actuating component includes drive piece, far end block and transmission structure, drive piece can be movably penetrated in holding rod inner cavity, drive piece is equipped with the far end block and transmission structure, and drive piece is equipped with the far end block and transmission structure, and the drive piece is equipped with the far end block and transmission structure. The near-end block and the far-end block are both in sliding connection with the two supporting plates, the transmission structure is in transmission connection with the far-end block and the driving part, the driving part is rotated to drive the far-end block to move towards or away from the near-end block, and the two supporting plates are opened or closed accordingly. According to the expandable test mold, a doctor can accurately simulate the condition of an implant in a body only through one surgical instrument, test mold instruments with different specifications and sizes do not need to be frequently inserted and taken out in the surgical process, the surgical time can be shortened, damage to surrounding tissue can be avoided, and pain of a patient and surgical risks are reduced.

The present disclosure relates to an artificial lumbar disc and provides a lateral approach artificial disc that is inserted laterally rather than anteriorly of the spine, thereby preventing damage to blood vessels or other organs that may occur when an anterior access artificial disc is inserted from the front, shortening the surgical time, preventing dislodgment of the artificial disc, and improving the surgical prognosis. The artificial disc is inserted between two adjacent vertebrae and includes an upper plate contacting an upper vertebra, a lower plate contacting a lower vertebra, and an inserter inserted between the upper plate and the lower plate to allow the upper plate to rotate by a set angle with respect to the lower plate, and an upper wing portion and a lower wing portion are formed on the upper plate and the lower plate.

The invention discloses a hip joint surgical robot grinding and rubbing detection system and a detection tool thereof, and relates to the technical field of medical instruments. The device comprises a bottom plate and a grinding and rubbing assembly, a hip model assembly is fixedly connected to one side of the top of the bottom plate, an acetabular fossa model assembly is fixedly connected to the other side of the top of the bottom plate, and a tracer support is fixedly connected to the position, located at the rear end of the acetabular fossa model assembly, of the top of the bottom plate. The grinding and rubbing precision can be monitored in real time in the operation process, immediate feedback is provided, an operation team can find and correct errors in the grinding and rubbing process in time, the success rate of the operation is increased, tiny grinding and rubbing errors can be detected by accurately measuring the ball center position of the grinding and rubbing contour, it is ensured that the surgical robot achieves high-precision grinding and rubbing operation, and the working efficiency is improved. Multiple times of X-ray or CT scanning needed by traditional postoperative imaging evaluation are avoided, the radiation risk of a patient is reduced, the grinding and rubbing precision detection process is simplified, the operation time is shortened, and the operation complexity is reduced.

The invention relates to the technical field of operation time prediction, in particular to an operation time real-time prediction model based on preoperative and intraoperative information and an artificial neural network, which comprises the following steps: a data acquisition module, construction of an artificial neural network model, a data preprocessing module and real-time deployment. The data acquisition module comprises the following steps of collecting a large amount of performed operation data in advance, including preoperative information, intraoperative information and actual operation time, classifying operation types and difficulty levels, classifying physical states of operation doctors, and performing preoperative acquisition; data of age, gender, weight, health condition, basic disease and previous operation records of a patient are subjected to collection model selection, a neural network is fed forward, and a simple multi-layer sensor is adopted; according to the scheme, the preoperative physical condition of the patient is compared with the previous operation record, the experience of an operation doctor is collected, and the sudden unexpected condition in the operation is predicted, so that the operation time is predicted and evaluated.

The invention belongs to the technical field of medical instruments, and relates to a telescopic intracranial aspiration and flushing system and an operation method. The problems that an existing endoscope is not high in function integration level, large in occupied operation space, long in operation time and lack of reference in the operation process are solved. The system comprises an endoscope module and a visual guiding module, the endoscope module and the visual guiding module cooperate to form an intracranial focus precise treatment integrated system under visual guiding, and full-process collaborative operation from focus detection, deep management and control to layered suction and synchronous flushing is achieved; the operation method comprises the steps of instrument assembly, focus detection and depth marking, operation chamber establishment, suction parameter presetting, negative pressure pipeline connection, layered suction and synchronous flushing, operation ending and the like. The endoscope tube, the suction tube, the flushing tube, the control button, the unlocking button, the adjusting hole and the like are integrated on the handle, one-hand operation is achieved, the operation steps are simplified, the operation space is saved, and the cooperation efficiency is improved.

The present invention discloses a method and device for preparing a micro-hook with a fixed function sling, which belongs to the field of medical sling manufacturing. The method and device for preparing a micro-hook with a fixed function sling of the present invention have a process flow including wire loop interruption, surface melt-blowing and cooling; the preparation device includes a wire loop interruption device, a melt-blowing device, a cooling device, a mesh unwinding device and a mesh winding device. The present invention organically combines wire loop interruption and melt-blowing processes, forming irregular fluff on the short burrs formed by wire loop interruption and the surface of the mesh, thereby increasing the friction of the mesh, improving the gripping force of the sling made of the mesh in the body, reducing the risk of the sling sliding on the tissue, and saving surgical time; in addition, due to the presence of melt-blown fluff, the requirements for the shape and size of the barbs on the short burrs are reduced, which can improve the efficiency and process flexibility of the wire loop interruption process, thereby helping to improve the overall production efficiency of the sling.

The utility model provides a kind of pulling device for endoscopic surgery, it includes connecting piece, and multiple pulling rings fixed on the connecting piece, multiple the pulling ring is sequentially spaced along the length direction of the connecting piece, and the intersection of adjacent two the pulling ring and the included angle is 72 °-120 °;The material of the connecting piece is inelastic material, and the material of the pulling ring is elastic material.The pulling ring of the present application is suitable for endoscopic dissection surgery, cooperates tissue clamp, according to different needs, pulls open mucosa, improves surgical field of view, and the number of tissue clamp can be reduced, the operation time is reduced, and the operation cost is saved.

The utility model discloses a kind of visual microinvasive injectors for living body cultivation gall, belong to the technical field of pharmaceutical manufacturing.A kind of visual microinvasive injector for living body cultivation gall, including upper shell, lower shell, limit ring, sealing plate, bottom plate, sealing ring, buckles and support block, the upper shell is sleeved in the surface of lower shell and limit ring, the limit ring is sleeved in the surface of injector barrel, limit ring one end extends to the outside of upper shell, and the other end is penetrated to the inside of lower shell.The utility model is designed as integrally-formed injector, minimally invasive surgery and visualization technology are integrated, simplify surgical procedure, even non-professional technical personnel can quickly master operation method.Integrally-formed design reduces different tools needed to switch or use in cooperation in surgery, reduces surgery time, reduces operation complexity, improves surgery efficiency and safety.

The application relates to the technical field of orthopedic puncture, in particular to an orthopedic puncture navigation system; through the cooperation of a puncture positioning module and a control module, image data and a mechanical adjusting mechanism are organically combined, high-precision planning and positioning of a target puncture point, a puncture angle and a puncture depth are realized, the dependence on the experience of an operator in traditional puncture operation is significantly reduced, the problem of inaccurate positioning caused by artificial judgment deviation is effectively solved, the operation time is greatly shortened, so as to reduce the pain and operation risk of a patient, the puncture positioning module adopts a mechanical structure of a multi-degree-of-freedom adjustable machine, through the cooperation of a horizontal distance adjusting rod, a vertical distance adjusting rod and a positioning cylinder, flexible and accurate adjustment of the position and angle of a target puncture needle in a three-dimensional space is realized, the structure is compact and the adjusting logic is clear, the adaptability of the system to different anatomical structures and operation scenes is enhanced, and the flexibility and controllability of operation are improved.

The utility model provides a surgical interventional operation instrument, which relates to the field of medical instruments, and comprises an interventional component, a sheathing canal, a handle, a flexible joint linkage assembly and a locking assembly, and the flexible joint linkage assembly comprises a control joint assembly, an execution joint assembly and at least two control lines; the execution joint assembly is connected between the far end of the sheathing canal and the near end of the intervention component; the locking assembly comprises an inner ball body and an outer ball sleeve which is movably sleeved outside the inner ball body so as to be in spherical hinge connection with the inner ball body, and the inner ball body is fixedly connected with the handle; under the action of external force, the outer ball sleeve can abut against and lock the inner ball body, so that the inner ball body and the outer ball sleeve jointly lock and control the motion posture of the joint assembly. The utility model can at least alleviate the technical problems in the prior art that the straight sheathing canal of a surgical interventional operating instrument (such as an electrosurgical operating instrument) is inconvenient for an operator to operate, complicated in operation and long in operation time, the trauma of a patient during the operation is large, and the postoperative recovery of the patient is not facilitated.

An electrical stimulation device for a cortical evoked potential capable of acquiring an electrical stimulation sequence on the basis of a task. Different channel sets related to a plurality of functions are constructed and sorted, that is, channels in any channel set that have not undergone electrical stimulation acquire alternative values of the channel sets on the basis of task-related electroencephalogram activation levels, and the alternative values corresponding to different channel sets are sorted to obtain a sequence of the channel sets; channels are sorted on the basis of the task-related electroencephalogram activation levels; and the order of the sorted channels is used as a preset electrical stimulation sequence for a cortical evoked potential. The device can characterize the relevance of channels across different functional areas, and can indicate the importance of the channels in the functional areas, such that a doctor is guided more objectively to obtain more useful electrical stimulation data within a shorter surgical time, so as to determine whether the positions of the channels affect functions and whether resection is allowed.

The utility model relates to the technical field of medical instruments, in particular to an atlantoaxial bone grafting device. The atlantoaxial bone grafting device comprises a bone grafting funnel and a bone grafting device, wherein the bone grafting funnel comprises a hollow pipe part and a funnel part arranged at the top end of the hollow pipe part; the funnel pushing piece comprises a first pushing rod and a pushing part arranged at the top end of the first pushing rod; wherein the first pushing rod can be arranged in the hollow pipe part, and when the pushing part is limited above the opening in the top end of the hollow pipe part, the bottom end of the first pushing rod extends out of the opening in the bottom end of the hollow pipe part; the bottom end of the first pushing rod is a flat and blunt end. According to the technical scheme, the surgical instrument for bone grafting of the atlantoaxial lateral mass joint is provided, bone grafting is accurately and effectively completed through one-time operation of the bone grafting funnel, the surgical operation difficulty is remarkably reduced, the bleeding risk is reduced, the surgical time is shortened, and the postoperative fusion rate is increased.

The invention discloses a lumbar surgery AI dynamic simulation system and decision making method based on multi-modal data fusion, and belongs to the field of medical artificial intelligence, the technical scheme is that the system comprises a multi-modal data input interface, a dynamic modeling engine, a surgical decision making matrix and a three-dimensional comparison unit, and specifically, CT / MRI, electromyogram and gait mechanics data are fused; constructing a spinal canal 4D model through improved U-Net < 3 + >, and predicting a nerve root dynamic path by means of GCN-LSTM; and in combination with a lumbar stenosis type, matching an adaptive operation form, and generating a pre-operation and post-operation quantitative comparison report marked by three colors. A spinal canal-nerve-biomechanics dynamic correlation model is innovatively established, 217 L4-S1 segment anatomical variation templates are arranged in the model, and the anatomical variation adaptation rate reaches 92.3%. Clinical test results show that the operation time planned by the system is averagely shortened by 26 minutes, and the postoperative reoperation rate is reduced to 2.4%.

The present application belongs to the technical field of medical operation auxiliary, and particularly relates to a precise tension control method and system for aortic repair operation. By acquiring the edge information and repair displacement of the repair area, the present application can not only evaluate the feasibility of the repair operation, but also obtain multiple executable repair plans through simulation calculation, so that the doctor can pre-plan the best repair scheme before the operation is implemented, greatly improving the success rate and safety of the operation. At the same time, the tension parameters in the repair process can be monitored in real time during the operation, ensuring that the repair process is carried out within a safe range, preventing the repair area from being stretched or compressed excessively, avoiding surgical risks, and through precise control of tension and optimization of repair plans, the operation time is shortened, the operation efficiency is improved, and the postoperative recovery time and complication risk of the patient are reduced.

The present disclosure provides a force control method, device, equipment and medium of a mechanical arm end power tool. The method comprises: determining the relative position relationship of the power tool end coordinate system in the surgical planning plane area coordinate system at the current moment based on the visual signal information and the current moment mechanical arm pose information; acquiring the force signal when the power tool is subjected to external force, and converting the force signal into the end force signal in the power tool end coordinate system; determining the position control amount corresponding to the power tool end based on the end force signal and the relative position relationship; judging the boundary of the position coordinate of the power tool end at the next moment according to the position control amount and the virtual boundary corresponding to the surgical planning plane area, and adjusting the position control amount according to the judgment result. The present disclosure improves the accuracy of surgical operation, shortens the operation time and reduces the operation risk.

The application provides a retractor for kidney transplantation surgery and relates to the technical field of medical auxiliary devices.The retractor comprises a retractor assembly and control pliers for controlling the opening and closing of the retractor assembly.The control pliers comprise two plier heads, and the retractor assembly comprises two retractor parts connected to the corresponding plier heads respectively.Two sets of the retractor assembly and the control pliers are symmetrically arranged, and a first driving device is arranged between the two sets of control pliers to maintain and / or adjust the distance between the two control pliers.A second driving device is arranged inside the control pliers to adjust the opening and closing angle of the control pliers.Both the first driving device and the second driving device are hydraulic telescopic elements.The application greatly improves the efficiency of the surgery and shortens the surgery time.In the process of the surgery, the surgery posture of the patient and the related equipment can be greatly adjusted without the need for secondary traction positioning, and the normal performance of the surgery is not affected by the great change of the surgery window.

This invention provides a femoral neck fracture fixation system, relating to the field of orthopedic medical devices. Addressing the current problems of poor anti-rotation performance and cumbersome guide structure layout leading to long surgical times during femoral neck fracture fixation, this invention employs a fixation plate combined with a guide section. A guide groove is formed on the guide section to guide the inserted locking screw, eliminating the need for additional guide structures and saving surgical time. The fixation plate located on the femoral side provides restraint to the locking screw, improving its stability and anti-rotation capability.

To provide a shunt inserter which can increase the precision while reducing operator effort and surgery time.SOLUTION: An inserter 100 can include a housing 102 and a slider component 106. The slider component can be coupled to the housing and positioned along an outer surface thereof. The slider component can be slidable along an elongate slot 110 of the housing and include a guide tab disposed within a guide channel 111 of a housing body. The slider can include a friction tab having a biasing member configured to urge against the housing body to urge the guide tab against a wall of the guide channel. Further, a deflector component can be provided that includes a needle guide configured to receive the needle of the inserter therein. The deflector component can be removably coupled to the inserter in order to permit the needle guide to bend the needle and maintain the needle in a bent configuration.SELECTED DRAWING: Figure 1B

The invention provides an ultra-wide-angle auxiliary lens system for an operating microscope, and relates to the technical field of operating microscopes, the ultra-wide-angle auxiliary lens system comprises a shell, the shell is arranged between a front lens and an eyeball and is suitable for being in contact with the eyeball, and an optical channel penetrating in the axial direction is arranged in the shell; the lens body is arranged in the optical channel, and the lens body is suitable for refracting fundus imaging light so that the distant peripheral fundus imaging light can be deflected and gathered towards the front lens. The ultra-wide-angle auxiliary lens system for the operating microscope can refract fundus imaging light, so that the front lens can collect fundus images in a larger range, a doctor can observe the fundus images in the larger range at a time, the condition of an operating site can be known more comprehensively, and the operating efficiency is improved. The operation risk caused by view limitation is reduced, the safety and success rate of the operation are improved, meanwhile, the requirement for frequently adjusting the view angle of the microscope is reduced, the convenience and efficiency of the operation operation are improved, and the operation time is shortened.

The utility model provides an electric clamp holder for an operating room, which belongs to the technical field of medical instruments and comprises a main body shell, the upper end of the main body shell is fixedly connected with a snakelike arm, a motor fixing support is fixedly connected in the main body shell, and the snakelike arm is fixedly connected with a handheld handle and a fixing chuck. According to the clamp holder for the operating room, the problems that according to an existing clamp holder for the operating room, when a medical worker conducts an operation, the medical worker usually needs to hold a corresponding surgical instrument by himself / herself, as the operation time goes on, the medical worker holds the medical instrument by hand for a long time, the hand is prone to fatigue, the operation efficiency is reduced, and the practicability is greatly reduced are solved.

The utility model belongs to the technical field of medical instruments, and provides an automatic driving structure for a push rod type handle, which mainly comprises a control handle, a first driving push rod and a second driving push rod, one end of the first control outer pipe is connected with the control handle; the first control wire is movably arranged in the first control outer pipe in a penetrating manner, and one end of the first control wire is connected with the free end of the first driving push rod; the first connecting piece is used for being detachably connected with the handle, a first connecting support capable of doing reciprocating linear movement is arranged on the first connecting piece, and the first connecting support is provided with a first connecting structure used for being rapidly connected with an external auxiliary device. By the adoption of the structure, automatic conveying of the consumable catheter on the consumable handle can be achieved, an operator does not need to fix the consumable catheter repeatedly, operation time is shortened, and efficiency is improved.

The invention provides a pre-dilation guide wire which is characterized in that the pre-dilation guide wire comprises a balloon, a first cutting hypotube, a first connecting tube and a hollow tube, an air inlet of the balloon is connected with an air outlet of the first connecting tube in a sealed mode, and an air inlet of the first connecting tube is connected with an air outlet of the hollow tube in a sealed mode; one end of the first cutting hypotube penetrates through the first connecting tube in the axial direction of the first connecting tube. The balloon is directly integrated to the guide wire body, the pre-expansion function is achieved, pre-expansion can be conducted immediately without replacing instruments after the guide wire penetrates through a lesion, the operation steps are remarkably simplified, the operation time is shortened, and the risk of vascular injury caused by multiple times of instrument exchange is effectively avoided; meanwhile, the tensile strength of the far end of the guide wire can be improved by arranging the safety wire, the product safety and the twisting control performance are improved, and the core wire is easier to control.

The present application relates to the field of intelligent control technology, and provides a method and system for controlling an operating room air-conditioning system, including: obtaining a surgery scheduling data table of a preset time window, which includes surgery time, surgery type, and operating room number; extracting data from a surgery record database in sequence to obtain multiple sets of historical surgery record data sets; extracting multiple sets of historical surgery durations to generate multiple sets of expected surgery durations; generating an operating room expected usage registration table based on the surgery scheduling data table and the multiple sets of expected surgery durations; obtaining multiple expected operating room schedules; monitoring unit energy consumption resources for multiple operating rooms; and controlling energy consumption of the operating room air-conditioning system based on the multiple expected operating room schedules and the multiple unit energy consumption resource monitoring results. This method can solve the problem of energy consumption and resource waste caused by irrational use of hospital operating room air-conditioning equipment, improve the control accuracy of hospital operating room air-conditioning equipment, and reduce energy loss.

The present application relates to the field of medical devices, and in particular to a flip-up assembly enhanced universal pedicle screw and a universal pedicle screw rod system, wherein the flip-up assembly enhanced universal pedicle screw comprises a main screw, a secondary screw detachably connected to the main screw, and a connector detachably connected to the secondary screw, wherein the main screw comprises a screw head, a screw rod, and a neck located between the screw head and the screw rod, wherein the diameter of the neck is smaller than the diameter of the screw head and the screw rod, one end of the secondary screw is sleeved on the neck, and one end of the connector extends from the screw head away from one end of the screw rod and is processed with a connecting thread. The present application has the advantages of improving the initial stability of the screw without increasing the number of surgical steps for the doctor, reducing the surgical time increased to improve the initial stability of the screw, and reducing the pain caused to the patient due to the long surgical time.

The application provides a surgical path recognition method, device and equipment of a Kirschner wire and a storage medium. The method comprises the following steps: acquiring a surgical image containing the Kirschner wire, extracting an image region where the Kirschner wire is located from the surgical image, detecting a linear structure existing in the image region where the Kirschner wire is located according to gradient information of pixel points in the image region where the Kirschner wire is located, determining a tip corner point of the Kirschner wire and boundary line segments on both sides of the tip corner point according to slope information of the linear structure, determining a center line of the Kirschner wire according to the tip corner point and the boundary line segments on both sides of the tip corner point, and taking a straight line where the center line is located as a surgical path of the Kirschner wire. The application can automatically plan a surgical path of the Kirschner wire, provide accurate path guidance for insertion of the Kirschner wire, ensure that the Kirschner wire reaches a target position according to a predetermined path, reduce a risk of a surgical time and peripheral tissue damage, and improve safety and efficiency of surgery.

The invention provides an extracorporeal circulation direct-view patent foramen ovale suturing device, and relates to the technical field of surgical instruments. The main body is of a circular rod-shaped structure, an external thread is arranged on the main body, and a limiting ring is fixedly mounted below the outer side of the main body; two sets of turnover frames are arranged in an end groove in the main body, each set of turnover frame is rotationally matched with the end groove through a torsion spring, each set of turnover frame can turn over by 90 degrees towards the outer side of the end groove, a push block is driven by a control rod to achieve unfolding and folding of the turnover frames, and the functions of guiding movement of a sliding piece and storage of a rotating piece are matched, so that surgical operation is simpler, more convenient and more controllable; the suture needle is quickly mounted through the fixing groove, and the suture line sequentially penetrates through the threading groove, so that the suture needle punctures the inner wall of the heart at a time in the operation process, the slipping phenomenon is avoided, the operation time is shortened, and the problems that a traditional plugging device needs to accurately match the size of an oval hole, model selection is limited and operation is inconvenient are solved. And the closing effect of the oval foramen with irregular shapes is not ideal.

A medical line ring comprises a suture line and is characterized in that a first line ring and a second line ring are wound on the suture line, and the leading-out ends, corresponding to the first line ring and the second line ring, of the suture line are led out towards the line rings on the opposite sides respectively. The leading-out section of the first wire ring and the leading-out section of the second wire ring are located on the same side of the connecting section of the first wire ring and the second wire ring or located on the two sides of the connecting section of the first wire ring and the second wire ring. When the leading-out section of the first wire ring and the leading-out section of the second wire ring are located on the two sides of the connecting section of the first wire ring and the second wire ring, the leading-out section of one wire ring penetrates through the other wire ring, namely the opposite wire ring, and the leading-out section of the first wire ring and the leading-out section of the second wire ring are clamped by the first wire ring and the second wire ring which are buckled. According to the invention, pre-standardized knotting can be realized, and industrial automatic production requirements are met. According to the utility model, the additional knotting step in the operation process and misoperation caused by on-site knotting can be avoided, the thread knot is small, the formed sliding locking knot is easy to slide, the locking knot is high in stability, the operation steps can be simplified, and the operation time can be shortened.

This invention relates to the field of capsulorhexis technology and discloses a cataract capsulorhexis device, comprising a capsulorhexis forceps body and handles fixedly installed on both sides of the forceps body. The clamping end of the forceps body is provided with two forceps tips. A positioning rod is fixedly installed on one inner wall of the forceps body, and positioning openings are provided on the other inner wall of the forceps body and the handles. A positioning component is provided at the end of the positioning rod away from the forceps body. This invention allows for flexible selection of forceps tips at different angles according to the progress of the surgery, the condition of the operated eye, and the holding habits of medical staff. Installation is simple and quick. During capsulorhexis, the locking component and the positioning component work together to stably lock the forceps tips in a closed state, eliminating the need for continuous force exertion by medical staff, effectively reducing hand burden and avoiding hand soreness and stiffness. Unlocking requires only a light press of the locking component, making operation simple, saving surgical time, avoiding disruption to the surgical rhythm, and ensuring precise surgical execution.

The utility model belongs to the technical field of medical instruments, and particularly relates to a rib traction device for thoracic surgery. The utility model provides a rib traction device for the thoracic surgery department, and aims to solve the problem that in the prior art, no rib traction device exists, so that ribs need to be manually retracted during an operation. The rib traction device for the thoracic surgery comprises a machine body, and a first traction arm and a second traction arm are arranged at the two ends of the machine body respectively; the first traction arm and the second traction arm can be automatically close to or far away from each other at the same speed through the driving assembly, and manual operation of a doctor is not needed. Therefore, not only is the operation time saved, but also personal errors in the operation process are reduced. And the traction arm can be quickly switched between a distraction state and a contraction state so as to meet the requirements of different stages in the operation process. Due to the flexibility, a doctor can complete the surgical operation more efficiently.

The prepuce dilator easy to operate comprises a plurality of dilation parts, a push rod and a dilation head, each dilation part comprises a base and a plurality of dilation flaps arranged on the base, the dilation flaps are evenly distributed at the front end of the base in the circumferential direction and are in a folded state, and the dilation head is arranged at the front end of the base and located on the inner sides of the dilation flaps. A hole position for the push rod to penetrate through is formed in the base, the push rod penetrates through the base and is connected with the expansion head, a plurality of clamping parts are distributed on the outer wall of the push rod at intervals in the length direction, receding openings are formed in the positions, corresponding to the clamping parts, of the hole position, and the clamping parts can be staggered with the receding openings through rotation of the push rod so as to be clamped to the upper edges of the receding openings. The prepuce dilator has the advantages of being convenient to use and high in dilation speed, the dilation speed can be switched along with operation of a doctor, the prepuce dilator is very suitable for the situation that prepuce and glans penis are not adhered, the diagnosis speed of the doctor can be increased, and the operation time can be shortened.