352 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 relates to a microwave ablation needle capable of dynamically measuring temperature, and belongs to the technical field of medical instruments. The microwave ablation needle comprises a needle head, a needle rod, a metal outer sleeve and an ablation needle handle, the two ends of the needle rod are fixedly connected with the ablation needle handle and the needle head respectively, and the metal outer sleeve is located on the outer side of the needle rod; the outer side of the metal outer sleeve is provided with a double-layer outer sleeve composed of a first elastic outer sleeve and a second elastic outer sleeve, the double-layer outer sleeve is tightly attached to the metal outer sleeve, and a temperature measuring element is arranged between the first elastic outer sleeve and the second elastic outer sleeve. A movable handle fixedly connected with the double-layer outer sleeve is arranged at the end, close to the ablation needle handle, of the needle rod. According to the invention, real-time temperature monitoring can be carried out on an actual ablation area target spot clinically, and the effectiveness and safety of interventional ablation are confirmed, so that the requirement of precise microwave ablation is met.

The present invention relates to a CT-guided tumor ablation scanning positioning and a device for an external fixator for an ablation needle, which is characterized by comprising a transparent adhesive tape and a fixator, wherein the transparent adhesive tape is rectangular and is provided with nine evenly arranged X-ray development positioning lines parallel to the long side direction thereof; a fixator is provided on at least one of the long sides of the transparent adhesive tape, and the fixator comprises a fixing seat and a support rod, wherein the fixing seat is long and fixedly connected to the long side of the transparent adhesive tape, a slide groove is provided in the fixing seat, a slider is installed in the slide groove, and there is friction resistance between the slider and the slide groove; the lower end of the support rod is connected to the slider, and a caliper for holding and fixing the ablation needle is installed at the upper end of the support rod. The present invention has an ingenious structure, a reasonable design, and is easy to use. It can free the doctor's hands during microwave ablation, and can prevent the displacement of the ablation needle to avoid causing serious complications.

A microwave ablation needle (100) and an ablation assembly. The microwave ablation needle comprises an outer tube (1), an inner tube (2), and a coaxial cable (3) which are coaxially sleeved in sequence, as well as a connection component (4) used for coaxially fixing and connecting the coaxial cable (3) to the outer tube (1), wherein the connection component (4) is connected to the inner wall of the outer tube (1) and the outer wall of the coaxial cable (3) in a sealed mode, so as to form a circulating cooling passage passing through a gap between the outer tube (1) and the inner tube (2), and a gap between the inner tube (2) and the coaxial cable (3); in a plane perpendicular to the length extension direction of the ablation needle, the outer tube (1) and the inner tube (2) define a first flow cross section, the inner tube (2) and the coaxial cable (3) define a second flow cross section, and a difference value between the area of the first flow cross section and the area of the second flow cross section is within a preset threshold range; in a microwave ablation process, a cooling medium carries out cooling by means of the circulating cooling passage, so that the pressure balance of the cooling medium through the first flow cross section and the second flow cross section is achieved. Therefore, the present invention can solve the problem in the prior art of unbalanced pressure of cooling water.

The invention belongs to the technical field of medical instruments, and particularly relates to a prostate microwave ablation device which comprises a handle, an outer catheter is fixed to one end of the handle, an ablation cavity and a flushing cavity are formed in the outer catheter, and a needle outlet is formed in the end, away from the handle, of the outer catheter. The ablation cavity and the needle outlet are communicated with each other, the flushing cavity and the needle outlet are communicated with each other, a coil driving unit is assembled at the end, close to the outer catheter, of the interior of the handle, a needle advancing and retreating button is assembled at the upper end of the handle, and the coil driving unit and the needle advancing and retreating button are electrically connected through a wire. The prostate focus tissue is rapidly heated to about 150 DEG C through microwave energy, thermal coagulation and necrosis of the focus tissue are achieved, the method has the advantages of being rapid in effect taking and low in recurrence rate, meanwhile, water molecules are gasified through high temperature, the ablation process is conveniently monitored in real time through ultrasonic images, and compared with the prior art, the diameter is obviously reduced, and implementation of a soft needle is facilitated.

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.

A method for displaying real-time ablation growth projections is provided. The method includes applying, by a processor, an ablation model to image data of a patient. The ablation model is based on a position of an ablation probe, and the ablation probe is coupled to the processor. The method also includes displaying, on a display coupled to the processor, a projected ablation zone on the image data. The projected ablation zone is based on ablation parameters and the position of the ablation probe. The projected ablation zone includes a margin showing a confidence level. The method further includes ablating by the ablation probe. The ablating is based on an evaluation of the projected ablation zone with respect to a target. A system for performing a microwave ablation procedure is provided. A non-transitory computer-readable storage medium storing instructions is provided.

The invention discloses a three-dimensional microwave ablation instrument control system and method based on medical health big data, and belongs to the field of data processing systems. Cancerous tissue characteristics of a corresponding area and normal tissue characteristics of the corresponding area are obtained for ablation area anomaly analysis; the method comprises the following steps: performing ablation difficulty analysis on the basis of the position overlapping degree of cancerous tissues and normal tissues in a corresponding region, and analyzing the required power of an ablatograph on the basis of an ablation difficulty analysis result, an ablation region anomaly analysis result and the stability of equipment. According to the microwave ablation instrument, in-depth ablation area abnormity analysis and ablation difficulty evaluation are carried out, and power setting required by the ablation instrument in different areas is finally determined in combination with the stability of the equipment, so that the accuracy and the effect of microwave ablation treatment can be improved, the risk of complications can be effectively reduced, and the safety and the treatment effect of a patient can be ensured.

The utility model relates to a full-needle water-cooling microwave ablation needle which comprises a handle, a needle rod and a needle head connected to the front end of the needle rod. The needle rod comprises an outer tube, an inner tube and a coaxial cable which are coaxially arranged from outside to inside, the inner tube comprises a capillary tube and a water conduit which are sequentially arranged along the extension direction of the needle rod, and the capillary tube is hermetically connected with the water conduit through a choke ring; the front end of the water conduit extends into the inner front end of the needle, a microwave antenna is arranged in the needle, an inner conductor of the coaxial cable is connected with the microwave antenna, and the water inlet channel and the water return channel are communicated at the inner front end of the needle. The external water supply mechanism pumps normal saline into the water inlet channel, the normal saline enters the needle from the water inlet channel to cool a radiation area, then the normal saline flows back into the water return channel from the front end in the needle, and then the normal saline is discharged through the external water discharge mechanism. Normal saline flows through the whole needle rod and the needle head, so that the cooling effect is better.

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 provides a numerical simulation method for large tumor treatment of single-needle multi-point microwave ablation, and belongs to the technical field of large liver tumor data simulation. The method comprises the following steps: establishing a finite element simulation model, and solving the finite element simulation model according to the interaction among an electromagnetic field, heat conduction and biological tissues to obtain a simulation result; constructing a single-needle multi-point microwave ablation numerical model; carrying out ablation simulation by utilizing the single-needle multi-point microwave ablation numerical model, outputting multi-point ablation result data, quantifying the size and form of a solidification area, and carrying out space overlapping analysis on a contour surface to obtain the characteristics of the solidification area; ablation simulation is carried out by setting parameter combinations of pull-back distances and ablation time of a plurality of antennas, and an optimal parameter combination is obtained by combining feature analysis of a solidification area, so that numerical simulation of large tumor treatment is completed; according to the invention, the problems of low ablation temperature, long simulation time and difficulty in accurate positioning of the antenna in the existing single-needle multi-point microwave ablation simulation method are solved.

An exemplary microwave ablation system is provided. The system may use a switching antenna for both microwave heating of target tissue and microwave radiometry to monitor the temperature of the heated tissue to ensure that the desired temperatures are delivered to adequately treat the target tissue and achieve therapeutic goals. The system may integrate switching components into the switching antenna, which eliminates error from heating of the reference termination and heating of the electrical cables.

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 apparatus includes a movable cart with a support surface and a portable base unit including at least one microwave generator and at least one coolant flow generator. The portable base unit is removably positioned on the support surface. The at least one ablation probe assembly is configured to couple to the at least one microwave generator and the at least one coolant flow generator.

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).

1. The name of the product of this design: Disposable microwave ablation needle (straight handle). 2. Purpose of the product of this design: microwave ablation needle used for targeted tumor treatment. 3. The design key point of this appearance design product lies in the shape. 4. The picture or photo that best illustrates the design points: three-dimensional picture.

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 method of planning a microwave ablation procedure includes uploading a pretreatment scan to a control system of an energy delivery system, displaying the pretreatment scan on a display of the control system, and analyzing the pretreatment scan and identifying a target tissue region that includes a disorder. The method further includes creating and graphically displaying a digital target area on the pretreatment scan, planning and graphically depicting on the pretreatment scan a target path for one or more planned ablation probes, and creating a planned ablation zone for each planned ablation probe based on user-selected parameters. The method further includes placing one or more actual ablation probes in the subject patient, obtaining a probe scan of the subject patient that detects the actual ablation probes, and assigning the planned ablation zone for the planned ablation probes to the actual probes.

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.

Various aspects of the present disclosure are directed toward apparatuses, systems, and methods that may include a microwave ablation probe. The microwave ablation probe may include a feedline having an inner conductor, an outer conductor and a dielectric; and an antenna including a helical arm, the helical arm being electrically connected to the outer conductor of the feedline at a junction point, and a linear arm, the linear arm being electrically connected to the inner conductor of the feedline.

An articulating microwave ablation catheter and methods of use the catheter including a catheter sheathing housing therein a radiating section defining an ablation zone, a first pull wire traversing the catheter sheathing, a pull ring secured in a distal portion of the catheter sheathing and configured to receive the pull wire, and a drive mechanism operably connected to the catheter sheathing and the pull wire, wherein operation of the drive mechanism alters the length of the pull wire and a shape of a distal portion of the catheter sheathing and the location of the ablation zone defined by the radiating section.

The utility model relates to the technical field of medical instruments, and discloses an easy-to-cool microwave ablation needle, which comprises a handle, an ablation needle main body is fixed in the handle, the ablation needle main body comprises a metal shell, a coaxial cable is inserted in the metal shell, the coaxial cable comprises an outer insulating sleeve on the outer layer and a conductor on the inner layer, and the outer insulating sleeve is sleeved on the outer insulating sleeve. A cooling assembly is arranged in the metal shell, the cooling assembly comprises two isolating bars fixed in the metal shell, the two isolating bars are spirally distributed on the inner wall in the metal shell at equal intervals, and one side of each isolating bar is fixed to the outer wall of the coaxial cable. According to the utility model, the two water channels are spirally distributed on the outer wall of the coaxial cable, so that the depth of the water inlet channel and the depth of the water outlet channel reach the maximum, the flow and the flow velocity of cooling water are ensured, the distribution of the water inlet channel and the water outlet channel on the outer wall of the coaxial cable is more uniform, the cooling of the coaxial cable is more uniform, and the service life of the coaxial cable is prolonged. And the cooling effect is better.

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.

The invention relates to a microwave ablation assembly for treating anal fistula, which comprises an outer tube, a cable, a guide head, a PTFE piece and a near-end connecting piece, a first channel, a second channel, a third channel and a fourth channel are formed in the outer tube, and the cable passes through the first channel; a liquid inlet and a liquid outlet are formed in the side wall of the outer pipe, and both the liquid inlet and the liquid outlet are communicated with the second channel; the near end of the outer tube is connected to the near-end connecting piece, a first cavity and a second cavity which are separated from each other are formed in the near-end connecting piece, the near end of the fourth channel penetrates through the near end of the outer tube, so that the fourth channel is communicated with the second cavity, and the far end of the third channel and the far end of the fourth channel are both communicated with a connecting cavity of the outer tube; a liquid return opening is formed in the outer pipe and located in the first cavity. The PTFE piece is inserted into the far end of the outer pipe, and an insertion channel is formed in the PTFE piece; the guide head is inserted into the insertion channel from the far end side, and the far end of the cable is connected with the guide head. Tissues around the fistula are denatured through microwaves, coagulative necrosis is formed, and the purpose of safely treating anal fistula is achieved.