104 results about "Cryoablation" patented technology

In an embodiment, a cryoablation probe includes a shaft, where the shaft has a supply tube, a return tube surrounding the supply tube, an insulated portion, wherein a vacuum circuit runs through the insulated portion between the return tube and an insulating shaft, and an expansion chamber extending distally to the insulated portion. The probe further includes a distal tip configured to seal a distal end of the return tube. The distal tip has a tip portion extending distally from the distal end of the return tube and a plug portion configured to be inserted inside of the return tube. The probe includes a compressive element surrounding the return tube and the plug portion of the distal tip, configured to seal the distal tip to the return tube.

A cryoprobe includes a needle defining an internal cavity, a cryogen conduit positioned in the internal cavity, an adjustable insulating sleeve positioned in the inner cavity radially outward of the cryogen conduit, and a heater configured to heat the needle to predetermined temperature.

The invention discloses an adjustable targeting area type cryoablation needle with a heating function and a novel refrigerant hole structure, and belongs to the technical field of interventional medical instruments, the adjustable targeting area type cryoablation needle comprises a needle rod, a vacuum wall, a J-T groove, a J-T groove sleeve and an adjusting device; the vacuum wall is sleeved with the needle rod, the area from the far end of the needle rod to the far end of the vacuum wall is a target area, the area of the vacuum wall is a vacuum heat insulation area, and the vacuum wall comprises a vacuum wall outer pipe and a vacuum wall inner pipe; the J-T groove is formed in the vacuum wall inner tube, the far end of the J-T groove is located in the far end of the needle rod, and a side hole is formed in the side wall of the J-T groove; the J-T groove is sleeved with the J-T groove sleeve; the J-T groove sleeve and the vacuum wall are fixed together through a connecting piece and can move synchronously and axially. And the adjusting device is used for adjusting the length of the target area. By innovatively designing the arrangement of the cooling ablation air holes and the heat conduction isolation layer, more accurate control over the cryoablation range is achieved, and the safety and effectiveness of cryoablation interventional therapy are improved.

A probe for performing a cryoablation treatment that includes a handle with a heater configured to heat a fluid and a needle connected to the handle and extending therefrom to a distal end. The needle includes a pathway configured to move the fluid from the handle toward the distal end to heat the needle.

A method of positioning a cryoprobe includes receiving a cryoprobe repositioning selector indicating a desire to reposition a cryoprobe relative to a target tissue; obtaining cryoprobe operating information from one or more sensors positioned in the cryoprobe, wherein the cryoprobe operating information characterizes one or more operating parameters of the cryoprobe; energizing a heater in the cryoprobe to heat a tip of the cryoprobe to a predetermined cautery temperature threshold; and displaying a cautery indicator when the tip of the cryoprobe is greater than or equal to the cautery temperature threshold.

The invention discloses a cryoablation needle, and relates to the field of medical equipment, the cryoablation needle comprises a handle, a needle rod, a first air inlet pipe assembly, an air return pipe, a connecting sleeve, a sealing head, a clamping sleeve type compression joint and a second air inlet pipe assembly, the interior of the needle rod is arranged to be of a cavity structure with one end open, and one end of the connecting sleeve is fixedly connected with the handle; the sealing head is arranged on the needle rod in a sleeving mode and is in threaded sealing connection with the inserting end of the connecting sleeve, the air inlet end of the air return pipe is arranged in an air return channel of the connecting sleeve, and the cavity of the needle rod, the air return channel of the connecting sleeve and the air return pipe jointly form an air return channel. The air outlet end of the second air inlet pipe assembly is fixedly connected to the open end of the air return channel of the connecting sleeve and used for being in butt joint with the air inlet end of the first air inlet pipe assembly, and the clamping sleeve type compression connector is fixedly connected to the end of the telescopic structure of the connecting sleeve. The length of the needle rod exposed out of the body of a patient can be adjusted according to actual needs, and meanwhile the connection sealing performance of the needle rod is improved.

Embodiments herein relate to cryoablation systems. In an embodiment, a cryosurgery system includes a closed-loop working fluid circuit configured to contain a working fluid. The system can include a compressor configured to increase the pressure of the working fluid. The system can include a heat exchanger configured to lower the temperature of the working fluid. The system can include a cryoablation probe having a shaft having a supply tube and a return tube surrounding the supply tube. The system is configured so that, after exiting the first heat exchanger, the working fluid will enter the cryoablation probe, travel to the expansion chamber, expand in the expansion chamber at a Joule-Thomson orifice, travel to the cryoablation probe interface via the return tube, exit the cryoablation probe via the working fluid outlet, enter the compressor, and enter the first heat exchanger.

The invention discloses a cryoablation catheter system for pulmonary artery stent internal restenosis, and belongs to the field of medical instruments, the cryoablation catheter system comprises a catheter main body arranged on a guide wire, the catheter main body is provided with a treatment assembly, the treatment assembly is located at the far end of the catheter main body, the catheter main body is provided with a control handle, and the control handle is located at the far end of the catheter main body. The control handle is located at the near end of the catheter body, and the treatment assembly comprises a near-end balloon, a far-end balloon and a freezing balloon. When the near-end balloon and the far-end balloon are simultaneously full, a closed treatment cabin isolated from near-end blood flow and far-end blood flow can be formed in a blood vessel of a target treatment section, the freezing balloon is located in the treatment cabin, the closed treatment cabin thoroughly eliminates the blood flow hot pool effect, cold is prevented from being taken away by the blood flow, and the treatment effect is improved. Freezing energy is intensively acted on a diseased region, so that the ablation efficiency and accuracy are improved; meanwhile, thrombus, tissue debris and whole body blood flow which fall off in the treatment process are isolated, the risk of far-end embolism is reduced from the source, and damage to the blood vessel wall is avoided.

Embodiments herein relate to cryoablation systems. In an embodiment, a cryosurgery system includes a closed-loop working fluid circuit configured to contain a working fluid. The system can include a compressor configured to increase the pressure of the working fluid. The system can include a heat exchanger configured to lower the temperature of the working fluid. The system can include a cryoablation probe having a shaft having a supply tube and a return tube surrounding the supply tube. The system is configured so that, after exiting the first heat exchanger, the working fluid will enter the cryoablation probe, travel to the expansion chamber, expand in the expansion chamber at a Joule-Thomson orifice, travel to the cryoablation probe interface via the return tube, exit the cryoablation probe via the working fluid outlet, enter the compressor, and enter the first heat exchanger.

The application relates to the technical field of medical devices, in particular to a lung tumor treatment device based on irreversible electroporation and cryoablation, which comprises a single needle for generating high-voltage electric pulses, an ice knife for conveying cold gas medium and a CT display module for displaying CT images in real time, comprises a puncture sleeve, the puncture sleeve is provided with a sliding groove, the single needle and the ice knife are in gap cooperation with the sliding groove; a needle head is detachably connected in the sliding groove, the puncture sleeve is communicated with a conveying pipe, and the puncture sleeve is provided with an outlet for discharging the cold gas medium at one end; the sliding groove is also communicated with a collection mechanism for collecting external tissues, and the collection mechanism is used for collecting the external tissues based on the pushing of the needle head, the single needle and the ice knife; the application is convenient for switching surgical tools, reduces the damage to the surrounding tissues in the body during the treatment of lung ground glass nodules, and guarantees the removal effect of the lung ground glass nodules.

Provided in the present invention is a cryoablation system, which comprises a gas source, a rewarming tubing, a freezing tubing, and an output connector. The rewarming tubing is connected in parallel to the freezing tubing, the freezing tubing comprises a heat exchanger, a working medium flows in from an inlet end of the heat exchanger and then flows out from an outlet end of the heat exchanger after being converted into a freezing working medium in the heat exchanger, and the outlet end of the heat exchanger is in communication with the output connector. The cryoablation system further comprises a check valve; an inlet end of the check valve is in communication with the output connector, and an outlet end of the check valve is in communication with the inlet end of the heat exchanger. When the pressure surges, the check valve opens, so that part of the freezing tubing is in communication with part of the rewarming tubing to form a gas-venting circuit, thereby relieving the pressure surge caused by the phase change of the freezing working medium within the tubings.

The application provides a disposable cryoablation catheter, which comprises an internal hollow tube body, a freezing system and a freezing unit, the freezing unit comprises a plurality of split freezing groups which are independently connected with the freezing system, and each split freezing group comprises a split fiber tube, the split fiber tube comprises a treatment section, a connecting section and a straight tube section which are sequentially arranged from a distal end to a proximal end, and the connecting section is a bendable section; an end of the tube body close to the freezing system is externally provided with a handle, and a driving distal end of the handle is connected with the connecting section, the device drives the distal treatment section to be distributed in an outward expansion mode and freely adjusted through axial and circumferential driving of the handle, the bending movement of the distal treatment section is realized in a manually controllable state, the adaptability of the cryoablation catheter to a tumor surface is improved, meanwhile, overflow of the cold source to the parts which do not need to be treated in the action range can be avoided, and the device has better safety protection significance.

A method for providing thermal conductivity data relating to an anatomical structure, comprises: receiving first spectral computed tomography data relating to the anatomical structure; calculating a fat map of the anatomical structure and a water map of the anatomical structure based on the first spectral computed tomography data; calculating the thermal conductivity data relating to the anatomical structure based on the fat map and the water map; and providing the thermal conductivity data.

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: low-temperature surgical system host (RY-300). 2. The use of the design product: for controlling refrigerant and heat medium, real-time display of refrigeration temperature, monitoring the pressure of refrigerant and heat medium, controlling disposable sterile cryoablation needle, realizing the effect of freezing and heating, and then ablating the target tissue. 3. The design points of the design product: in the external shape of the product. 4. The picture or photo that best indicates the design points: perspective view.

The application belongs to the technical field of medical devices, and particularly relates to a kind of cryoablation catheter and ablation system, the cryoablation catheter includes inner catheter and outer catheter, the outer catheter is coaxially sleeved on the outside of inner catheter, the inner catheter is configured as a multi-lumen structure, further comprising: a plurality of sealing components, a plurality of the sealing components are arranged on the outside of inner catheter;Wherein, in the initial state, a plurality of the sealing components and inner catheter are located in the inside of outer catheter, in the working state, a plurality of the sealing components and intestinal wall form an ablation closed space together. The application guides the cryoablation catheter to the target position through the guide wire, forms the ablation closed space through the cooperation of sealing components and lumen wall, inputs the cryogenic medium into the ablation closed space to freeze and ablate the lumen wall, provides a usable treatment plan for type 2 diabetes, obesity or other lumen lesion patients, and has the advantages of small trauma, less pain for patients, low surgical risk, etc.

A cryoprobe assembly includes a needle, a flexible conduit, and a handle portion configured to couple the needle to the flexible conduit to create a cryogen flow path. The flexible conduit includes a counterflow heat exchanger to transfer thermal energy from supply cryogen to return cryogen prior to reaching the needle in order to achieve a predetermined temperature during Joule-Thompson expansion in the needle.

A system for performing cryoablation treatments includes at least one computing device that is configured to obtain cryoablation operating information from one or more sensors coupled to a cryoablation treatment apparatus and to obtain patient information from one or more patient monitoring apparatuses. The computing device also obtains ice formation information characterizing one or more characteristics of an iceball produced by the cryoablation treatment apparatus and compares the ice formation information to an ice formation plan. If the ice formation information differs from the ice formation plan, the computing device adjusts one or more operating parameters of the cryoablation treatment apparatus.

The application discloses a kind of frozen ablation catheter and its working method, comprising: frozen probe, first channel and second channel being communicated with frozen probe;Wherein, to form the shunt channel of first channel and second channel between first channel and second channel, shunt channel forms shunt inlet at first channel, and shunt channel forms shunt outlet at second channel;When refrigerant enters second channel from first channel through shunt channel, local low pressure is formed at shunt outlet.The application carries out different degrees of shunt in advance to high-speed flowing refrigerant, uses the local low pressure area formed by the entrainment phenomenon generated by high-speed fluid to determine whether the balloon of frozen probe exists breakage leakage by monitoring the pressure change in catheter.

Systems and methods for cryoablation. One example system includes an interior portion, an exterior portion and a treatment element. The system includes a first loop in the interior portion of the system, the first loop having a first controller, at least one valve, and a first sensor; a second loop in the interior portion of the system, the second loop having a second controller, and at least one valve, and a second sensor; a pressurized coolant supply in fluid communication with the first loop and the second loop; and a temperature sensor disposed on the exterior portion of the system, the temperature sensor being configured to monitor the temperature on the exterior portion of the system.

1. Name of the product in this design: Disposable sterile cryoablation needle. 2. Purpose of this product design: To monitor the temperature of ablation needle in real time using a disposable sterile cryoablation needle, and to achieve freezing and heating effects by using the cold and heat media transmitted by the low-temperature surgical system, thereby performing cryoablation treatment on the target tissue. 3. The key design features of this product are its external shape. 4. The image or photograph that best illustrates the design's key points: a 3D model.

The utility model relates to a cryoablation catheter with a supporting device, which comprises a sheath tube, an air inlet tube, an air return tube, a guide wire cavity tube, a bag body, the supporting device and a handle, the far end of the sheath tube is fixedly connected with the near end of the bag body, the near end of the sheath tube is fixedly connected with the handle, the far end of the bag body is fixedly connected with the far end of the guide wire cavity tube, and the bag body is fixedly connected with the handle. The supporting device is composed of an inner supporting piece and an outer supporting piece, the inner supporting piece is arranged in the bag body, the outer supporting piece is arranged outside the bag body, the supporting device is of a self-expanding structure, when the supporting device is converted from a compressed state to an expanded state, the inner supporting piece supports the inner wall of the bag body, and the outer supporting piece supports the outer wall of the bag body. The capsule body is tightly attached to a target area, the outer supporting piece is supported on the inner wall of a blood vessel, and a blood flow channel is established between the outer side of the capsule body and the inner wall of the blood vessel.

The invention discloses a cryogenic radiofrequency ablation needle and system, and belongs to the technical field of cryoablation, the cryogenic radiofrequency ablation needle comprises a needle head part, an adjusting handle part, a delivery pipe part, a quick connector part, a rewarming temperature measurement ablation plug part and a radiofrequency ablation plug part, the needle head part is connected to the adjusting handle part, and the delivery pipe part is connected to the radiofrequency ablation plug part; the adjusting handle part is used for connecting the needle head part and the conveying pipe part, the quick connector part is connected to the conveying pipe part, and the rewarming temperature measurement ablation plug part is connected with the radio frequency ablation plug part. On the basis of a cryoablation probe of a high-pressure nitrogen throttling freezing technology, the rewarming module and the radio frequency ablation module are added, central control switching of the three modules is achieved, the integrated structure design of the freezing module, the rewarming module and the radio frequency module is achieved, the integrated structure can be used in a multi-module combined mode and can also be used independently, and the cost is reduced. The cold ablation function and the thermal ablation function are mutually complemented.

Disclosed are a spray cryoablation catheter, a sealing device, and a catheter, aiming at the problem of high intrapulmonary pressure caused by the existing passive deflation method. The spray cryoablation catheter comprises a catheter connector located at the proximal end of the catheter, a catheter nozzle located at the distal end of a catheter main body, and a path channel arranged in the catheter main body and used for substance, energy, or information transmission. The path channel at least comprises a working medium delivery channel and a pressure acquisition channel. A regulation device is also arranged, and the regulation device controls, on the basis of the pressure in the pressure acquisition channel, the excess flow rate of a working medium in the regulation device, so as to achieve pressure closed-loop control, thereby dynamically and accurately controlling the amount of cryogen sprayed during treatment and preventing high intrapulmonary pressure.

This invention relates to a cryoablation probe with an integrated vacuum cannula. The cryoablation probe includes a housing extending axially and forming a needle for positioning at a target tissue, and a tube extending axially and positioned radially inward of the housing. An inner surface of the housing and an outer surface of the tube define an insulating cavity therebetween.

The invention discloses vein closed cryoablation equipment which comprises a low-temperature coolant circulating system, an adjustable cryoablation catheter and a temperature real-time monitoring feedback system, and is an innovative cryoclosure system provided for treatment of great saphenous varicosity. Based on latest clinical research data and an engineering principle, compared with the existing conventional thermal ablation technology, the vein closing cryoablation equipment has the advantages that a better closing effect can be realized, nerve injury is greatly reduced, and intraoperative pain is relieved.

Embodiments herein relate to a cryoablation probe comprising a pre-cooler fluid circuit; a working fluid circuit; a vacuum circuit; and a shaft. The shaft includes a supply tube and a return tube surrounding the supply tube. The return tube comprises a first polymer layer, wherein the first polymer layer is configured to contain fluid from the working fluid circuit; a reinforcing layer; and a second polymer layer. Other embodiments are also included herein.

The invention discloses a cryoradiofrequency ablation catheter and system, and belongs to the technical field of cryoablation, the cryoradiofrequency ablation catheter comprises a needle catheter part, a handle, a catheter extension tube assembly, a plug assembly, a vacuum plug assembly and a cable plug assembly; the needle head catheter part is flexible; a far-end connecting needle catheter part of a near-end connecting catheter extension tube assembly is handheld and used by a user, and the far end of the catheter extension tube assembly is connected with a handle near-end connecting plug assembly; the far end of the plug assembly is connected with the near end of the catheter extension tube assembly; the far end of the vacuum plug assembly is connected with the plug assembly and extends into the vacuum layer of the needle catheter part. The high-pressure nitrogen or argon throttling freezing technology is used as a freezing mode, only the front-end flexible guide pipe section needs to be subjected to vacuum heat insulation, and the pressure resistance characteristic and local heat insulation of the pipeline and the connector are optimized. Meanwhile, a rewarming module and a radiofrequency ablation module are added on the basis of the cryoablation probe, and central control switching of the three modules is achieved.

The invention belongs to the technical field of medical instruments, and particularly relates to an efficient cryoablation needle which comprises a handle, a connecting pipe is fixed to one end of the handle, a needle rod is fixed to the end, away from the handle, of the connecting pipe, a needle head is fixed to the end, away from the connecting pipe, of the needle rod, and an expansion cavity is formed in the needle head. A transmission pipe is fixed to the other end of the handle, a connector is fixed to the end, away from the handle, of the transmission pipe, a fluid pipe and a coaxial cable are assembled in the connector, one end of the fluid pipe and one end of the coaxial cable extend into the expansion cavity, and an antenna is fixed to the position, located in the expansion cavity, of one end of the coaxial cable. A cooling working medium is input into the needle through the fluid pipe, so that the needle can perform cryoablation, microwaves are transmitted to the spiral antenna through the coaxial cable 1, so that the antenna can perform microwave ablation, and the device has the advantages of fast temperature rise, large ablation area, low cost and the like.

Provided herein are catheter devices, systems, and methods to ablate a tissue location. The devices, systems, and methods disclosed herein include ablation systems including a catheter system with inner and outer shafts that deliver an ablation medium (e.g., a cryogenic ablation medium) to a body lumen and evacuate the ablation medium from the body lumen. Devices, systems, and methods disclose herein can include expandable structures that facilitate in positioning of nozzles and / or evacuation of ablation medium from a body lumen. A dehumidification or anti-freezing medium can also be communicated into an internal organ to dehumidify the internal organ before cryoablation.