139 results about "Microwave ablation" patented technology

The invention provides a microwave ablation control system and method used based on nuclear magnetic resonance, and belongs to the technical field of ablation control, and the system comprises an MRI rapid temperature measurement module, a temperature prediction module, a microwave ablation power control module, a tissue impedance monitoring module and a data fusion processing module. The microwave ablation instrument, the MRI rapid temperature measurement module and the tissue impedance monitoring module are all connected with the data fusion processing module, the microwave ablation instrument is further connected with a microwave ablation needle inserted in ablation area tissue, and the temperature prediction module and the microwave ablation power control module operate on the data fusion processing module; in combination with the method, the defects that in an existing microwave ablation control method used based on nuclear magnetic resonance, due to the fact that the MRI temperature measurement sequence collection and reconstruction speed is limited, the closed loop control period is too long, the nonlinear change of the heating rate caused by tissue impedance mutation cannot be coped with, and then the overtemperature or undertemperature problem occurs are overcome.

The invention relates to the technical field of minimally invasive ablation, in particular to a liver tumor microwave ablation postoperative contraction deformation prediction method, which comprises the following steps: performing unified standardization processing on different periods of liver MRI images; accurately marking a preoperative liver tumor area, a postoperative ablation area and a postoperative liver tumor ghost area of the liver MRI image to obtain masks of the corresponding areas; designing a distance perception function as an attention parameter of different areas of the liver MRI image; constructing a multi-sequence distance guide complementary network model; selecting a loss function; selecting an elastic registration method to perform pre-operation and post-operation registration; and calculating an ablation safety boundary through the ablation area mask and the adjusted tumor mask. The liver tumor microwave ablation postoperative curative effect evaluation accuracy can be effectively improved, and a foundation is laid for formulating a subsequent treatment plan of a patient.

The invention discloses an AI optimization intelligent diagnosis and treatment system and method with an intelligent puncture mechanical arm combined with a microwave ablation instrument, and relates to the technical field of AI treatment. According to the moving track of the puncture mechanical arm and the appearance characteristics of the puncture needle, simulating the three-dimensional space position of a puncture path in the body of a patient, analyzing the contact condition of the puncture path and the visceral organs, constructing a danger degree evaluation model of the contact condition of the puncture path and the visceral organs, and obtaining an evaluation result of the danger degree of the contact condition of the puncture path and the visceral organs; according to the method, the actual three-dimensional path is obtained according to the operation deviation condition of the mechanical arm, then the danger value is judged according to the contact condition of the mechanical arm and the visceral organs, and therefore the optimal path is screened out, and the treatment safety is improved.

The utility model relates to a microwave ablation device handle and a microwave ablation catheter, comprising a microwave joint assembly configured to couple a microwave host, the microwave joint assembly comprising a pin and a joint body, the pin and the joint body being insulated; the water circulation assembly is configured to be used for cooling a guide pipe connected with the water circulation assembly; the coaxial cable is connected with the microwave connector assembly, penetrates through the water circulation assembly and extends to the far end of the catheter; the inner conductor of the coaxial cable is matched with the pin, and the outer conductor is matched with the joint body; the connecting base is arranged between the microwave connector assembly and the water circulation assembly, a sealing annular groove is formed between the connecting base and the microwave connector assembly, and a sealing ring is arranged in the sealing annular groove and used for preventing cooling water in the water circulation assembly from entering the microwave connector assembly to cause short circuit of the inner conductor and the outer conductor. A sealing ring is installed between the electrical part and the water circulation part of the handle, assembly is completed in an interference fit mode, and water is effectively prevented from entering the electrical part to cause short circuit.

The invention relates to a microwave ablation needle, which comprises an outer tube, an inner tube, an outer tube, an inner tube and an outer tube, the inner pipe is coaxially arranged in the accommodating cavity of the outer pipe; the coaxial cable is arranged in the inner tube, the far end of the coaxial cable is connected with a radiation electrode, and at least part of the radiation electrode is exposed out of the inner tube; a gap between the inner pipe and the coaxial cable forms a water inlet cavity, a gap between the inner pipe and the outer pipe forms a water outlet cavity, and the water inlet cavity is communicated with the water outlet cavity; wherein the inner tube and the outer tube are formed with a radiation region and a reflection region on the outer periphery of the radiation electrode in the circumferential direction. The radiation area can allow microwave energy emitted by the radiation electrode to penetrate through, the reflection area prevents the microwave energy from penetrating through, directional radiation of the microwave ablation needle on target tissue through the radiation area is achieved, heat energy is generated, the target tissue is inactivated, and unnecessary damage to other normal tissue is avoided.

A microwave ablation probe includes a handle configured to operably couple a supply cable to a probe needle, and a gasket positioned in the handle to seal a joint between the handle and the supply cable. The gasket is configured to allow a predetermined amount of rotation of the supply cable relative to the handle and to prevent rotation of the supply cable relative to the handle of more than the predetermined amount.

The invention belongs to the field of medicines, and particularly relates to a nanosheet capable of activating an STING pathway and improving microwave ablation as well as a preparation method and application of the nanosheet. The nanosheet is prepared from MXenes through organic acid treatment, organic alkali dispersion, STING agonist compounding and phospholipid modification, and has good microwave thermal conversion efficiency and an STING pathway activation function. The combined microwave ablation can enhance the immunogenic death of tumor cells, promote the maturation of dendritic cells, doubly activate immune response and effectively inhibit the growth and metastasis of prostatic cancer, provides a new strategy for the treatment of prostatic cancer, and can be used for preparing drugs for treating prostatic cancer.

1.The name of the design product: needle head (bullet head) of microwave ablation needle. 2.The use of the design product: used with microwave ablation equipment, belonging to the field of medical devices. 3.The design points of the design product: in shape. 4.The picture or photo that best indicates the design points: perspective view. 5.Other circumstances that need to be explained: the design product requested to protect does not contain color; the design product is a partial design, the part requested to protect is the yellow part in the view, and other parts are not claimed.

A microwave ablation probe (100), comprising: an applicator (106) having a radiating section (106a) arranged to emit electromagnetic energy to cause heating in tissue; a feed cable (108) having a distal end and a proximal end and being arranged to supply electromagnetic energy to the applicator (106), the applicator (106) being coupled to the distal end of the feed cable (108); a flexible tubular member (110) comprising a shaft portion (111) and a tip portion (112), the tip portion (112) located at a distal end of the tubular member (110) and being adapted for insertion into tissue, wherein the applicator (106) and at least part of the feed cable (108) are located within the tubular member (110); and a restriction means (114) arranged to restrict the separation between the applicator (106) and the tip portion (112) of the tubular member (110). The restriction means (114) comprises a flexible tethering member (116) extending between the applicator (106) and the tip portion (112), the tethering member (116) being arranged to restrict at least proximal movement of the applicator (106) relative to the tip portion (112) of the tubular member (110). Also disclosed is a method (1000) of manufacturing the ablation probe (100).

The invention discloses a bone-like osteoma microwave ablation thermal injury assessment method based on all-optical parameters, which comprises the following steps: respectively considering thermal injury models of cortical bone and cancellous bone under different microwave ablation conditions by constructing a simulation model conforming to bone tissue characteristics; according to the method, construction of an incomplete P5 approximation model is proposed, bone tissue all-optical parameter anti-construction research based on steady-state radiance is carried out, the accuracy is high, calculation is convenient, temperature parameters and biological tissue all-optical parameters are analyzed in a combined mode, a tissue thermal damage model of the temperature and tissue all-optical parameters is established through theoretical research, and due to the characteristics of different bone tissues, the tissue thermal damage model can be used as a tissue thermal damage model of the temperature and tissue all-optical parameters. The tissue types are considered in the thermal damage model, and effective bone tissue thermal damage factors are designed based on different tissues, so that the evaluation accuracy is ensured.

A microwave ablation probe includes an outer shell defining an inner cavity axially extending to a probe tip, a cable extending in the inner cavity and comprising an antenna, and a choke coupled to the cable in the inner cavity. The choke comprising an inner layer mechanically locked to an outer casing.

A surgical system is disclosed including a probe and a balloon operatively coupled to the probe. The probe includes a shaft, an antenna extending from the shaft, and a conductor extending through the antenna and operable to deliver energy to tissue of a patient. The balloon is transitionable between an inflated state and a deflated state. In the inflated state, the balloon maintains a position of the antenna relative to the tissue and enhances energy delivery from the conductor to the tissue.

A microwave ablation probe tip includes a post portion configured to be received in an ablation probe needle, the post portion comprising one or more annular grooves, and an insertion portion comprising a shoulder at which the insertion portion is connected to the post portion, wherein the insertion portion tapers in a direction away from the shoulder.

A method for treatment of volume of interest (VOI), for example tumor, comprising a device for application of therapy in multi sites in a pre-defined volumetric array through a single needle insertion into the body. Therapies applied by this method include injection of therapeutic agents, including cytotoxic, immunologic and biologic drugs or drug combinations; radioactive substances; thermal ablation including radiofrequency ablation, microwave ablation, or cryoablation. The method addresses the problem of inadequate distribution of therapy throughout the VOI through a single needle insertion.

1. The name of the design product: microwave ablation instrument (component). 2. The use of the design product: used for coagulation and ablation treatment of pathological tissues in the body. 3. The design points of the design product: in shape. 4. The picture or photo that best indicates the design points: component 1 perspective view 1. 5. Other circumstances that need to be explained: component 1 is a microwave ablation instrument; component 2 and component 3 are ablation needle handles.

The invention relates to a microwave ablation and irreversible electroporation composite ablation system. The system mainly comprises an integrated host platform integrated with a microwave energy generation module, a high-voltage pulse generation module and a main control module. The microwave energy generation module is used for generating high-frequency microwave energy and is connected with the microwave ablation needle; the high-voltage pulse generation module is used for generating high-frequency electric pulses and is connected with the irreversible electroporation needle; the main control module is used for coordinating the output time sequence of the microwave energy generation module and the high-voltage pulse generation module through a preset cooperative control algorithm. According to the invention, system integration is realized, and two different energies can be managed in a unified manner through a set of highly integrated host platform and intelligent control software, so that equipment switching is not needed, the process is simple, the efficiency is improved, data intercommunication can be realized, intelligent control is realized, and space occupation is reduced.

The invention relates to a microwave ablation probe with an integrated temperature sensor. A microwave ablation probe includes a housing extending axially and defining a lumen, a tip positioned at a distal end of the housing, and a plurality of thermocouples integrated in the housing.

The application discloses a microwave ablation needle fixing support, characterized by comprising: hinged left and right bridge arms, a universal ball suitable for being clamped and fixed between the two bridge arms, and a locking mechanism for locking the clamped state of the two bridge arms, wherein the universal ball is provided with a vertical slot, and an elastic rubber gasket for clamping and fixing a microwave ablation needle is arranged in the vertical slot. After the microwave ablation probe completes puncture, the ablation probe has a certain relative position and included angle with the skin plane of a patient. The application can firmly fix the ablation probe on the skin of the patient without increasing the puncture difficulty, increasing the length of the ablation probe, or changing the puncture state of the ablation probe after the puncture is completed, so as to prepare for subsequent ablation operation. After the ablation operation is completed, the gear locking device is opened, and the fixing support can be conveniently removed.

The application discloses a kind of microwave coagulation equipment idle protection method and system, it is related to microwave coagulation equipment technical field, the method includes: through temperature sensor being arranged on the microwave coagulation equipment microwave ablation needle, temperature rise is generated by real-time absorption microwave energy that is leaked to air due to idle, and corresponding temperature is collected;According to the temperature collected at each time point, the temperature change rate on temperature sensor is continuously calculated according to set time interval;Whether the microwave coagulation equipment is idle state is judged by the temperature change rate.The application improves the timeliness of idle state determination, to improve the timeliness of microwave coagulation equipment idle state protection.

A cable assembly (1) for medical radio frequency or microwave ablation. The cable assembly includes a coaxial cable (2) with an inner conductor (3), encompassed by a dielectric layer (4), encompassed by an outer conductor (5). The cable assembly (1) further includes a first cooling line (6) and a thermal conductive layer (7), which in a cross-sectional view encompasses the coaxial cable (2) and the first cooling line (6) in a circumferential manner. The thermal conductive layer (7) is configured to reduce a thermal peak caused by the coaxial cable (2) when transferring energy, by distributing thermal energy around the coaxial cable (2) and the first cooling line (6) in a circumferential manner.

This invention discloses a microwave ablation electrode, relating to the field of medical device technology. It mainly includes a main needle body, whose working end can release microwave energy to achieve microwave ablation. The main needle body is equipped with a non-working end circulating cooling structure and a working end liquid injection structure. The non-working end circulating cooling structure allows a cooling medium to reach the non-working end of the main needle body to cool the non-working end and surrounding tissue, and also allows for the return flow of the cooling medium. The working end liquid injection structure allows a cooling medium to reach the working end of the main needle body to cool the working end and surrounding tissue, and also allows the cooling medium to be injected into the lesion tissue, absorbing microwave energy to form steam, achieving steam thermal ablation. This invention achieves dual ablation through steam thermal ablation and microwave ablation, improving the ablation effect, reducing the temperature of the working end of the microwave ablation electrode, and increasing the moisture content of the tissue surrounding the working end, thus reducing carbonization of the lesion tissue.

The embodiment of the invention discloses a transmitting power control method, device and equipment of a microwave ablation needle and a medium, and belongs to the technical field of microwave ablation. The method comprises the steps that the actual transmitting power and the actual reflecting power of the microwave ablation needle are obtained; based on the actual transmitting power and the actual reflecting power, impedance matching is conducted on the microwave ablation needle in combination with the first corresponding relation, and the actual impedance corresponding to the microwave ablation needle is determined; obtaining ideal effective power of the microwave ablation needle; determining target transmitting power corresponding to the ideal effective power based on the actual impedance in combination with a second corresponding relation; and controlling the actual transmitting power of the microwave ablation needle to be adjusted to the target transmitting power. Impedance real-time detection in the microwave ablation process is achieved, manual-independent automatic control over the transmitting power of the microwave ablation needle is achieved, the treatment effect of the microwave ablation needle is improved, application and development of the microwave ablation needle in the medical field are promoted, and manpower resources are effectively saved.

An ablation probe employs a triaxial construction with axial slots in an outer pair of tubular conductors separated by different dielectric materials to provide microwave power concentrated along a plane.

The embodiment of the invention discloses a method, device and equipment for confirming the puncture position of a microwave ablation needle and a medium, and belongs to the technical field of microwave ablation. The method comprises the steps that at least one puncture path of the microwave ablation needle is determined based on a first three-dimensional model constructed by CT image data; acquiring radar point cloud data of a scanning part corresponding to the CT image data; constructing a second three-dimensional model based on the radar point cloud data; and performing model comparison on the first three-dimensional model and the second three-dimensional model, and determining at least one puncture position of the microwave ablation needle from the second three-dimensional model based on the at least one puncture path. The puncture position of the microwave ablation needle is automatically determined, the positioning accuracy of the puncture position of the microwave ablation needle is improved, the treatment precision of microwave ablation is improved, and compared with optical positioning and magnetic positioning in the related technology, the number of needed surgical accessories is small, the time needed for arranging the surgical accessories is short, and the operation efficiency is improved. And the time required by the whole microwave ablation operation is shortened.

A microwave ablation electrode is provided. The microwave ablation electrode mainly comprises a main needle body. A working end of the main needle body can release microwave energy to realize microwave ablation. A non-working end circulation cooling structure and a working end liquid injection structure are arranged on the main needle body, wherein the non-working end circulation cooling structure can allow a refrigerant medium to reach a front end of a non-working end of the main needle body to cool the non-working end of the main needle body and the surrounding tissues, and the non-working end circulation cooling structure can allow the refrigerant medium to flow back. The working end liquid injection structure can allow the refrigerant medium to reach the working end of the main needle body to cool the working end and the surrounding tissues.

The invention relates to the technical field of microwave ablation, in particular to a built-in wireless temperature measuring device based on a microwave ablation composite cable and a use method thereof, and the method comprises the following steps: S1, importing a preoperative medical image of a patient into a host system, and marking a tumor volume and a target ablation volume; s2, inserting a microwave ablation needle with a plurality of wireless temperature sensing nodes arranged along the axial direction into a target tissue, and enabling the sensor nodes to cover a tumor area; s3, starting microwave ablation and recording microwave power and a temperature measurement value {yi (t)} of each node in real time; according to the method, micro wireless temperature nodes with dense front ends and sparse rear ends are arranged in an ablation cable, anti-interference multi-access wireless communication is adopted, a prediction model based on simplified Pennes equation + normalized SAR template and assisted by online data assimilation, and closed-loop power control with a safety priority principle as a core are adopted, so that the ablation accuracy is improved; the thermal field space sampling density is remarkably improved while extra puncture wounds are reduced.

The utility model relates to an air-cooled microwave ablation device which comprises an ablation needle and a microwave ablation main machine. A cooling gas control unit is arranged in the microwave ablation host, an air inlet channel and an air outlet channel are arranged in the ablation needle, the air inlet channel is communicated with the air outlet end of the cooling gas control unit through an air inlet pipe, and the air outlet channel is communicated with the air inlet end of the cooling gas control unit through an air outlet pipe. The cooling gas control unit cools the gas medium, then the cooled gas medium is fed into the gas inlet channel in the ablation needle through the gas inlet pipe to be cooled, and the acted gas returns to the cooling gas control unit through the gas outlet channel to be cooled again. Oxidation caused by reaction of water and copper in an ablation needle structural part in a traditional water cooling structure is avoided, the situation of water leakage of a cooling system is eradicated, ablation equipment is effectively protected, disturbance to an energy field emitted by an ablation needle is avoided, and the gas consumption is reduced through a circulating backflow cooling mode.

Examples of a water-cooled microwave ablation probe are disclosed. The probe comprises a feed cable and an antenna with a radiator, a reflector and a dielectric material therein between. An outer sheath with a flexible tubular body encases the feed cable and portion of the antenna. A front-end of the outer sheath is connected to the antenna such that the radiating head extends out of the outer sheath. The outer sheath is bonded to a rear section of the radiator and portion of the reflector defining a coaxial tuning cavity of the antenna. A flexible elongated water tube is coaxially inserted in the outer sheath forming an inlet channel in the water tube and outlet channel in the space between the water tube and the outer sheath. The cooling water circulates in the probe cavity cooling down the feed cable and the reflector.

The utility model discloses a disposable needle for rapid microwave ablation, and relates to the technical field of microwave ablation needle treatment. The rapid microwave ablation disposable needle comprises a needle body shell, a connecting ring is connected to the bottom of the needle body shell, a limiting block is connected to one end of the connecting ring, a handle is arranged at the bottom of the needle body shell, a connecting base is connected to the top of the handle, a groove is formed in one end of the connecting base, the connecting ring is made of ceramic, and the limiting block is connected to the other end of the connecting ring. The limiting block connected with one end of the connecting ring is embedded into the groove, then the connecting ring is rotated, the needle body shell is connected with the handle, and when the needle is assembled and used for the first time, the connecting ring can normally play a connecting role. However, after use, if the needle body shell and the handle are tried to be detached, the connecting ring is made of a fragile ceramic material, so that the connecting ring can be broken when external force is slightly applied, and the requirement of disposable use is met.

The utility model belongs to the technical field of medical instruments, and particularly relates to a multi-channel microwave ablation needle. Aiming at the problems of uneven energy distribution and single thermal field regulation and control in the design of a single coaxial cable in the prior art, the utility model provides a multi-channel microwave ablation needle which comprises an ablation needle handle and a needle rod fixedly connected to the ablation needle handle, and an ablation needle head is arranged at one end, far away from the ablation needle handle, of the needle rod. A plurality of coaxial cables used for transmitting microwave signals are further arranged in the ablation needle handle, one end of each coaxial cable penetrates through the needle rod and extends into the ablation needle head, and the coaxial cables are evenly distributed in the circumferential direction of the axis of the ablation needle head. According to the utility model, the plurality of coaxial cables are uniformly arranged along the circumferential direction of the axis of the ablation needle head, and three coaxial cables are preferably adopted, so that the power, the phase and the working time of each coaxial cable can be independently controlled, and the accurate regulation and control of an energy field can be realized.