1906 results about "Surgical Manipulation" patented technology

The invention relates to the technical field of force feedback handles, in particular to a remote surgical robot control system based on a force feedback handle and a control method thereof. The method comprises the following steps: carrying out multi-dimensional force data acquisition on an end effector of the surgical robot, and carrying out contact force size, direction and time sequence feature extraction to obtain multi-dimensional force feature data; performing surgical operation safety baseline analysis according to the multi-dimensional force feature data to generate surgical operation safety baseline data; performing dynamic force feedback threshold calculation according to the surgical safety operation baseline data to obtain force feedback threshold range data; and performing adaptive compression processing on different force feedback signals according to the force feedback threshold range data to obtain dynamic force feedback control parameters. Through real-time control instruction optimization and a closed-loop feedback strategy, the system can quickly respond to an operation intention, early warning is carried out on potential risks, and it is ensured that the operation process is safer and more reliable.

A robotic surgical system includes one or more robotic actuators configured to interact with biological tissue during a surgical procedure. A plurality of sensors include at least one of fiber Bragg grating sensors, piezoelectric strain sensors, or magnetostrictive sensors to capture real-time mechanical, elasticity, or deformation data from biological tissues. deep learning engine trained on a dataset comprising tissue mechanical responses across multiple tissue types, pathological states, and patient demographics. Pre-contact predictive adjustment profiles are generated for anticipated tissue interactions using preoperative imaging data registered to intraoperative coordinates. Intraoperative deviations are detected from predicted mechanical behavior and autonomously recalibrate actuator forces. Upcoming surgical maneuvers are anticipated based on prior task sequences and adjust actuator stiffness or damping properties in preparation for anticipated contact. An emergency override of actuator forces is provided via an anomaly detection module when real-time sensor data deviates beyond a threshold from the predicted safe mechanical response range. A feedback loop iteratively refines the deep learning engine during the procedure using supervised learning updates, anomaly detection, and reinforcement learning strategies. The reinforcement learning model is optionally shared across procedures to optimize distributed actuator force patterns for minimizing localized and cumulative tissue stress.

The invention relates to an operation auxiliary system and method based on image processing, and the method comprises the steps: obtaining a preoperative medical image of a patient, collecting a multispectral imaging medical image of a surface structure, blood flow distribution and tissue elasticity of an operation region in real time, carrying out the image feature extraction after preprocessing, obtaining a preoperative image feature and an intraoperative multispectral image feature, and carrying out the image feature extraction; constructing a biomechanical organ model, updating tissue deformation parameters of the biomechanical organ model, performing space-time alignment on the intraoperative multispectral image features and the biomechanical organ model, generating a three-dimensional enhancement model including vascular topology, lesion boundary and elastic distribution, and superposing the three-dimensional enhancement model to a real-time surgical field image to obtain a real-time surgical field image. Marking the relative position of the surgical instrument and the risk area, generating an intervention signal when the instrument is close to a critical safety distance threshold value, and performing surgical operation by a doctor under assistance. Multi-dimensional intraoperative information is obtained through multi-spectral imaging to construct a high-precision dynamic biomechanical model, and precise navigation and active intervention are achieved in combination with the augmented reality technology.

The invention discloses a motion error dynamic compensation method applied to a surgical mechanical arm, and belongs to the technical field of surgical mechanical arm control and medical automation. The method comprises the following steps: firstly, acquiring position data of each joint encoder of the surgical mechanical arm, a motor current signal, a position feedback signal of an end effector, load change information and accumulative operation duration in real time; processing the data, fusing the data through adaptive Kalman filtering to estimate a joint dynamic error, inputting a load change rate and an accumulated operation time length into a pre-training error prediction model to output a compensation basic quantity, and fusing the load change rate and the accumulated operation time length to generate a real-time error compensation quantity; and then the compensation amount is superposed to a joint original control instruction to correct motion parameters, and finally the compensated tail end position deviation is analyzed, and a precision identifier or an adjustment prompt is generated and fed back to a control system. According to the method, real-time error compensation is achieved, the compensation precision and working condition adaptability are improved, it is guaranteed that the mechanical arm is stably positioned, and the surgical operation risk is reduced.

The invention discloses a surgical instrument segmentation method based on a double prior guidance network, and the method specifically comprises the steps: constructing a hybrid encoder composed of a visual basic model and a state space model, and carrying out the coding processing of an input surgical endoscope image; the visual basic model is an SAM2-Hira model; the state space model is a MambaVision model; an adapter layer composed of a standard adapter and a Mama enhancement adapter is arranged between the coding layer and the decoding layer, and coding features are processed; setting a multi-context guide decoder, and performing multi-scale feature recovery and mask segmentation; a hybrid encoder, a Mama enhancement adapter and a multi-context guidance decoder form a double-priori guidance network DPG-Net, and high-precision surgical instrument segmentation is realized by using the DPG-Net. Accurate visual support is provided for the surgical robot, and the accuracy and safety of surgical operation are greatly improved.

The invention provides a bending-adjustable microcatheter with multi-section bending control, and belongs to the technical field of bending-adjustable microcatheters.The bending-adjustable microcatheter with the multi-section bending control comprises a catheter body, a driving assembly and a control assembly, and the catheter body is composed of seven flexible pipe sections which are connected with one another; the driving assembly comprises seven independent shape memory alloy drivers, and each shape memory alloy driver is connected with the outer side of the corresponding flexible pipe section. The control assembly comprises a power supply, a microprocessor and a temperature sensor, the power supply supplies power to the shape memory alloy drivers, the microprocessor controls the current of each shape memory alloy driver, and the temperature sensor monitors the temperature of each flexible pipe section in real time; the problems that the bendability of a traditional catheter is usually limited, the catheter can only be operated within a fixed angle range, the bending form of the catheter is fixed, and various surgical operation requirements cannot be perfectly met can be solved.

The utility model relates to a cervical conization knife, and belongs to the field of gynecological operation instruments. Comprising a knife handle and a detachable blade. And the front end 2 of the knife handle tilts and forms an angle with the longitudinal axis of the handheld end 1 of the knife handle. According to different angles between the longitudinal axis of the front end 2 of the scalpel handle and the longitudinal axis of the handheld end 1 of the scalpel handle, the scalpel is divided into three models of A, B and C which are respectively at angles of 27 degrees, 31 degrees and 37 degrees. The cross section of the blade body is arc-shaped, the radian is consistent with that of the cervix uteri, the arc length is 1 / 8 of the circumference of the cervix uteri, namely 1cm, the two sides of the blade are both blade faces 3, the front ends of the blade faces 3 converge to enable the blade tip 4 to be an arc-shaped triangle, the rear end 5 of the blade is a parallel blunt face, and the longitudinal axis of the blade is provided with scales 6. Compared with a traditional cold knife, the novel cervical cold knife can be applied to gynecology cervical cold knife conization, surgical operation is facilitated, a cut cone can be regular, cervical injury is reduced, and the shape and the function of the cervix are reserved to the maximum extent.

The invention relates to a robot-assisted surgery system, in particular to a force feedback monitoring method, medium and system for multi-sensor data fusion based on deep learning, and the method comprises the following steps: obtaining the magnitude and direction of the force applied by a tool, and the acceleration change during vibration and movement; preprocessing the data and performing feature extraction; inputting the extracted spatial features into a deep learning model for time sequence processing; judging a current stage state according to a result obtained by processing the deep learning model, and adjusting a transfer correction coefficient; and carrying out force feedback on the corrected force feedback result. Compared with the prior art, the problem that in the prior art, the touch sense of a doctor cannot be simulated during fine operation, so that surgical operation only depends on experience and visual speculation of the doctor is solved. According to the scheme, in combination with multi-sensor data, micro force changes in an operation are processed and analyzed in real time through a deep learning algorithm, and therefore the accuracy and safety of the system are improved.

The invention provides a personalized adjustable artificial vertebral body, and belongs to the technical field of medical instruments. An end plate adjustable rod; the sliding groove is formed in the end plate adjustable rod; the external thread is fixedly connected between the inner walls of the two sides of the end plate adjustable rod, and the external thread is located in the sliding groove; the notch and the structure are designed individually, customization can be carried out according to the requirements of different patients, and better adaptability and clinical effects are provided; the angle adjusting function is achieved, and the angle of a vertebral body can be adjusted through combination of an end plate adjusting rod and an external thread; the length can be adjusted, and personalized adjustment of the length of the vertebral body is achieved through cooperation of the adjusting nut and the adjusting screw rod; the stability is high, the stability of initial implantation is provided by a spine and a support frame structure, and bone induction and long-term fixation fusion are promoted in a bone trabecula area; the operation is simple, the use method is clear, and doctors can perform surgical operations conveniently.

The invention provides an AI-based medical record diagnosis and surgical operation code intelligent generation method and system, and relates to the technical field of medical information, and the method comprises the steps: obtaining multi-modal data from a hospital information system, including a text medical record, a medical image, a surgical video and a pathological report; entities and relationships are extracted through a multi-modal fusion model, and a hospital-level disease knowledge graph containing space-time dimensions is constructed; training a coding rule generation model and a verification model based on a reinforcement learning framework, and generating candidate codes and confidence scores thereof; and correcting the candidate codes according to manual feedback, and dynamically updating the knowledge graph and the rule base by using the graph neural network. Accurate disease diagnosis codes and surgical operation codes are generated in an intelligent mode, and the accuracy of the codes can be remarkably improved through automatic medical record code recommendation.

The invention relates to the technical field of medical report generation, in particular to an intelligent anesthesia record sheet automatic generation system. According to the system, patient information is automatically recognized through the OCR unit, and real-time collection and structured storage of physical sign data, medication records and surgical operation are achieved in combination with a medical equipment interface and a voice recognition technology; time sequence data analysis and multi-source data fusion modeling are adopted to construct a medical event causal relationship graph so as to improve the accuracy of anomaly recognition and patient sign evaluation; based on a time axis construction unit and a structured template engine, an anesthesia record list is automatically analyzed and filled, and the manual input workload is greatly reduced; and finally, in combination with block chain evidence storage and a multi-level encryption technology, the security and non-tampering property of the anesthesia record list are ensured, the reliability of medical data management is improved, the recording, monitoring and storage efficiency of the anesthesia process is comprehensively optimized, and the medical quality and the patient safety are improved.

The invention relates to the technical field of medical robot control, in particular to a teleoperation control method and system for an alimentary canal catheterization robot. The control method comprises the following steps: acquiring digestive tract three-dimensional structure data of a patient by utilizing imaging equipment; based on the three-dimensional structure data, establishing a patient individualized three-dimensional operation model through a teleoperation system; planning a catheterization path and an operation strategy according to the three-dimensional operation model; collecting motion state data of the alimentary canal catheterization robot in real time through a sensor of the teleoperation system; dynamically matching the motion state data acquired in real time with the three-dimensional operation model of the patient; deviation information fed back by a sensor in the operation process is obtained, an angle error signal is generated, and the catheter arranging robot is corrected in real time by adjusting a control strategy; the control system comprises a target sensor, a teleoperation part, a control module and an upper computer. By means of the mode, delay is reduced, high-precision control is provided, the force sensing technology is introduced, the feedback experience of an operator is enhanced, and therefore the precision and safety of surgical operation are improved.

The invention provides a liver blood flow and anesthesia depth combined monitoring system in a liver operation. The liver blood flow and anesthesia depth combined monitoring system comprises seven modules including a multi-source data collector, a signal preprocessor, a physiological coupling model calculator, an operation recognizer, a brain-liver information flow analyzer, a risk prediction early warning device and a clinical decision assist device. According to the system, liver blood flow parameters and anesthesia depth parameters are collected and analyzed in real time, a dynamic coupling relation model between the liver blood flow parameters and the anesthesia depth parameters is established, and in combination with automatic recognition of surgical operation and quantitative analysis of brain-liver information flow, early prediction and early warning of surgical risks are achieved, and individualized clinical decision support is provided.

The invention provides a catheter for vascular intervention, and belongs to the technical field of interventional medical instruments. The catheter comprises a conveying pipe body, a first pipe cavity, a second pipe cavity and a supporting component. The delivery tube body at least comprises a protective layer, a supporting layer and a lining layer which are sequentially arranged from outside to inside, and the delivery tube body is used for establishing a passage along a blood vessel; the first pipe cavity extends in the axial direction of the conveying pipe body and is used for conveying treatment instruments. The second pipe cavity and the first pipe cavity are arranged in parallel; the supporting component is arranged in the second tube cavity in a penetrating manner and is in sliding fit with the second tube cavity, and the hardness of the supporting component is lower than that of the treatment instrument; during working, after the conveying pipe body enters a blood vessel to establish a passage, the supporting component enters the conveying pipe body along the second pipe cavity, so that the supporting performance of the conveying pipe body is improved; the catheter is used for solving the technical problems that an existing catheter is inconvenient in surgical operation, low in efficiency and low in safety performance due to contradictory requirements of turning performance and supporting performance.

The invention provides a real-time operation remote video consultation system and method based on virtual reality, and the system comprises a driving data collection module which collects multi-modal data; the data processing module is used for carrying out fusion processing on data from different acquisition sources; the virtual image driving module is used for reconstructing a virtual scene of an operation site and performing three-dimensional modeling and rendering on an image acquired by the high-definition camera and an internal structure image acquired by the medical imaging equipment; the template matching module is used for collecting and sorting standard action templates of common surgical operations and matching the standard action templates; the data collaboration module is fused with the virtual scene to display the medical data of the patient; and the 5G robot assistance module remotely controls the robot to execute an action corresponding to the virtual reality scene through 5G. According to the invention, audio and scene fusion is realized, scene fidelity is improved, and consultation immersion is enhanced. Interaction between experts and virtual scenes in consultation can be achieved, consultation efficiency and sense of participation are improved, doctors are assisted in standard operation, and surgical risks are reduced.

A system and method for planning and simulating a surgical operation to create a patient-specific spinal implant are disclosed. The system comprises a remote server configured to receive patient-specific medical image data and generate a 3D mesh model of the patient's spine using algorithms that separate vertebral bodies, remove artifacts, and smooth surfaces. A doctor's computer receives the 3D mesh model and allows real-time manipulation of intervertebral spaces to achieve a desired spinal curvature. The server generates a spinal implant design with surface-mapped endplates matching the patient's vertebral anatomy, which is transmitted to a 3D printer for manufacturing. The method includes steps of receiving image data, generating and updating the 3D mesh model based on doctor input, generating the final implant design, and transmitting it for production. The invention enables the creation of patient-specific spinal implants with improved conformity and surgical outcomes.

The invention discloses an operation index determination method and device for an endoscopic surgery, equipment and a storage medium, and can be applied to the technical field of surgical operation data processing. The method comprises the following steps: firstly, acquiring a surgical operation data set of a target operation object for an endoscopic surgery; the surgical operation data set comprises a plurality of pieces of surgical operation data sorted according to a time sequence. Each piece of surgical operation data comprises five-dimensional data, namely endoscope action data, endoscope type data, instrument action data, instrument type data and surgical object data. And constructing a hidden Markov model by using the surgical operation data set. In the hidden Markov model, the surgical operation described by the surgical operation data is the observed quantity, and the surgical state is the state quantity, and based on the hidden Markov model, the statistical principle is utilized to carry out quantitative evaluation on the surgical operation indexes, so that the accurate evaluation of the surgical operation when a doctor carries out the endoscopic surgery is realized, and the reference effectiveness of the operation indexes is improved.

The utility model discloses a snake bone joint, a flexible joint assembly and a surgical operation arm, relates to the technical field of medical instruments, and aims to relieve the problem that two snake bones slide in an uncertain dislocation mode when the snake bone joint is bent. The snake bone joint comprises a first snake bone and a second snake bone, the first snake bone and the second snake bone can rotate based on respective pivots, the two pivots are parallel, and the distance between the two pivots is constant; the first snake bone comprises a restraint roller, the second snake bone comprises a restraint hole site, and the restraint roller is movably arranged in the restraint hole site; the restraining hole site comprises a first restraining face and a second restraining face which are oppositely arranged, and the restraining roller arranged in the restraining hole site is clamped between the first restraining face and the second restraining face. Therefore, the snake bone joint has the advantage that the bending precision and the load deformation resistance of the snake bone joint are improved.

The invention discloses an actuating mechanism and a surgical instrument, and relates to the field of medical instruments. The actuating mechanism comprises a transmission assembly, and the transmission assembly comprises an actuating piece, a dowel bar, a locking arm, an unlocking piece and a locking elastic piece. During specific operation, a user drives the dowel bar to move by adjusting the rotation stroke of the actuating piece, so that the dowel bar can pull an external dowel wire to execute expected operation, and the actuating piece is automatically locked by the locking arm; a user acts on the locking arm to move away from the actuating piece through the abutting action of the unlocking piece so as to unlock the actuating piece, the locking elastic piece is compressed, then the rotating stroke of the actuating piece is adjusted, and therefore the dowel bar is driven to move. According to the actuating mechanism provided by the invention, the transmission assembly is at least partially arranged on the far-end area in the assembly cavity, so that the occupation of excessive space of an interventional instrument can be avoided, the flexibility of operating the instrument can be improved, and a user can be promoted to adapt to surgical operation at an extreme angle.

A retractor for use in surgical operations comprises a pair of blade assemblies. In operation, the blade assemblies are initially in a closed position to assume a low profile, inserted into a relatively small incision, and stretched apart from each other, thereby stretching the skin about the incision to form an aperture longer than the incision. The retractor is adapted to rotate a first blade about a first axis and a second blade about a second axis. The retractor is adapted to move the pair of blade assemblies apart along a third axis. The retractor is adapted to pivot the first blade about a fourth axis and the second blade about a fifth axis. In some embodiments, a method of performing an operation, e.g. a spinal operation, on a patient using the disclosed retractor is provided.

The invention relates to a bioelectronic surgical suture for suture tension monitoring, the surgical suture comprises a cannula and a conductive material, the cannula is a hollow capillary tube, and the conductive material is arranged in the cannula through perfusion and is subjected to first laser scanning treatment after perfusion; a micro-nano structure is manufactured on the outer wall of the sleeve through second laser scanning. According to the principle of friction nanometer power generation, the tension of the surgical suture causes the change of the contact area between the suture and tissue and the change of an output electric signal in the collection process, the tension of the surgical suture can be reversely deduced, and the purpose of monitoring the surgical suture tension is achieved. The operation line is a self-powered sensor, and an external power supply is not needed. The operation line can provide different quantitative feedbacks according to different suturing modes and suturing parts, and is combined with clinical suturing experience of doctors to assist in establishing a tension quantitative model, so that the doctors are helped to optimize operation procedures, postoperative complications are reduced, and wound healing is promoted.

The invention discloses a multi-angle adjustable operating bed, which belongs to an operating bed in the technical field of medical equipment, and adopts the technical scheme that the multi-angle adjustable operating bed comprises a head-back plate assembly, a supporting plate, a supporting plate and a supporting plate, the seat plate assembly is provided with an angle-adjustable waist supporting plate group and a main supporting plate, and one side of the waist supporting plate group is hinged to one side of the main supporting plate; the leg plate assembly is provided with an angle-adjustable thigh supporting plate and an angle-adjustable shank supporting plate; a leg plate hydraulic cylinder group which is relatively overturned is arranged between the seat plate assembly and the leg plate assembly, and the leg plate assembly is provided with two leg supporting plate groups which can be relatively opened; according to the multi-angle adjustable operating bed provided by the invention, the legs, the waist and the head of a lying patient can be stably supported after adaptive adjustment by the operating bed, so that the patient can be adaptively placed on the operating bed by medical staff, and the patient can be conveniently subjected to surgical operation.

The invention relates to the technical field of medical instruments, in particular to a shapeable surgical instrument. The invention provides a shapeable surgical instrument which comprises a control part, a working part and an extending part connected with the control part and the working part, the working part comprises a first inner pull rod and a forceps seat, and an execution part used for surgical operation is fixedly connected to the forceps seat. The control part comprises a first inner pull rod, the first inner pull rod can do back-and-forth linear motion in the axial direction of the forceps seat, the control part comprises a second inner pull rod, the first inner pull rod and the second inner pull rod are connected with each other, the first inner pull rod can do relatively independent rotation motion along the second inner pull rod, and the moldable surgical instrument can meet the 360-degree molding requirement. And the clinical requirements of shaping at various angles are met.

The utility model discloses a stitching instrument for stitching an endoscope puncture hole. The stitching instrument comprises a handle part and two operating rods which are assembled on the handle part in a rotatable structure, the lower ends of the two operating rods are respectively provided with a convex needle connecting part, and the lower ends of the two operating rods extend out of the guide cylinder of the handle part; in the rotating action of the two operating rods, the needle connecting parts at the lower ends of the two operating rods are folded or unfolded; when the needle connecting parts of the two operating rods are in a folded state, the guide cylinder located at the handle part is in an axial storage coverage range of a trocar channel through which the guide cylinder needs to penetrate during surgical operation; the lower end of each operating rod is provided with a needle mounting base formed in an outward protruding mode, the needle mounting bases are connected with suture needles through detachable structures, and the suture needles are connected to the needle mounting bases in place to form an inflection assembly structure facing the handle part. According to the stitching instrument, the stitching operation is simplified, the stitching safety, flexibility and efficiency are improved, the forming structure of the stitching instrument is simplified, and the practicability is higher.

The invention discloses a semantic segmentation and pose estimation method and system for a surgical robot instrument under an endoscope image, and relates to the field of computer vision. The objective of the invention is to solve the problems that an existing semantic segmentation and pose estimation method of a surgical robot instrument is large in error rate and poor in real-time performance and generalization performance, the constraint effect of time sequence information is rarely considered, and the requirement of accurate surgical operation is difficult to meet. According to the technical key points, a backbone network is used for extracting multi-scale information of an original image of an endoscope, and a feature encoding module aggregates encoded features from features extracted from the backbone network and comprises image local feature information of the image at different abstraction levels; the semantic segmentation decoder is used for generating segmented images from the image feature map, and the segmented images provide implicit geometric constraints for the pose estimation decoder; based on geometric constraints provided by a semantic segmentation result, the position and posture estimation decoder regresses the positions and posture parameters of the wrist and the rod of the surgical instrument relative to the camera from the feature map, and the opening and closing angle of the tail end of the instrument; and a time sequence module is used to construct a time sequence data buffer queue for continuous frame analysis, inter-frame jitter is reduced, and the precision of pose estimation and end opening and closing angle estimation algorithms is improved.

The invention discloses a neurosurgical operation virtual simulation training system based on multi-modal data fusion, and relates to the technical field of operation simulation. The data acquisition and preprocessing module acquires data such as images and force feedback, and standardized storage is performed after filtering and registration; the multi-modal data fusion module performs weighted fusion on the data by using an attention algorithm to generate a three-dimensional model; the virtual operation scene construction module generates a high-fidelity environment through ray tracing and a physical engine; the surgical operation interaction simulation module realizes accurate interaction through positioning tracking and force feedback; the training evaluation and feedback module quantifies operation performance and provides guidance; and the system management and iteration module guarantees operation and supports data updating and optimization. According to the method, a high-reality scene is constructed through multi-modal fusion, interaction and multi-dimensional evaluation help skill improvement, dynamic difficulty and personalized paths are adaptive to different users, collaborative training and privacy data collaboration are supported, operation training standardization is promoted, and the risk of errors in an operation is reduced.

The invention discloses an occluder pushing mechanism and an occluder conveying and forming device.The occluder pushing mechanism comprises an occluder, a multi-cavity tube, a core rod, a forming pull wire and a tensioning wire, and the occluder conveying and forming device comprises the occluder pushing mechanism and a wire cutting handle. The thread trimming handle comprises a shell, a multi-cavity tube fixing ring, a thread leading device, a core rod sliding block, a thread locking assembly and a thread trimming assembly. According to the occluder conveying and forming device, the thread trimming handle and the occluder pushing mechanism are preassembled into a whole, the surgical operation process is optimized, the convenience and safety of surgical operation are remarkably improved, the thread trimming success rate is greatly increased, and smooth implementation of the surgery is guaranteed; meanwhile, connection between the thread trimming handle and the plugging device is established through the forming pull thread and the tensioning thread, the overall structural design is simplified, and surgical operation steps and potential risks are effectively reduced.

A retractor for use in surgical operations comprises a pair of blade assemblies. In operation, the blade assemblies are initially in a closed position to assume a low profile, inserted into a relatively small incision, and stretched apart from each other, thereby stretching the skin about the incision to form an aperture longer than the incision. The retractor is adapted to rotate a first blade about a first axis and a second blade about a second axis. The retractor is adapted to move the pair of blade assemblies apart along a third axis. The retractor is adapted to pivot the first blade about a fourth axis and the second blade about a fifth axis. In some embodiments, a method of performing an operation, e.g. a spinal operation, on a patient using the disclosed retractor is provided.

The application provides a valve support and an artificial valve with the same, and belongs to the technical field of heart valves. The valve support comprises a support body, a positioning ring and an elastic connecting wire. The positioning ring is arranged in a compressed state and is adapted to be sequentially and serially arranged along an axis with the support body. When the positioning ring is elastically deformed from the compressed state to an expanded state, the positioning ring can be coaxially sleeved on the support body through the traction of the elastic connecting wire. After the valve support is implanted, the positioning ring can be self-expanded to the expanded state through elastic deformation and can be coaxially sleeved on the support body according to the traction of the elastic connecting wire. Therefore, the positioning ring and the support body can be simultaneously positioned during the implantation operation. Due to the traction of the connecting wire, the support body can be self-positioned according to the positioning ring, thereby saving the separate positioning operation of the positioning ring and the support body and making the operation more convenient.

The invention relates to the field of medical instruments, in particular to a resectoscope. The resectoscope comprises an inner sheath assembly, an outer sheath assembly and an operation assembly, the side face of the end, away from an outer sheath body, of an outer sheath tube protrudes outwards to form a protruding belly, a plurality of through holes are evenly formed in the protruding belly, and the tail end of the inner sheath tube is connected with a tube head extending to the outer side of the outer sheath tube. Besides, corrugations are arranged on the outer sheath tube, a first connector and a second connector are arranged on the upper side and the lower side of the outer sheath body respectively, the inner sheath body and the outer sheath body are connected through a first quick release assembly, the operation assembly comprises a first grip and a second grip, and quick disassembly and assembly are achieved through the second quick release assembly and a third quick release assembly. The effects of improving surgical operation flexibility, reducing tissue damage and simplifying instrument cleaning and maintenance are achieved.