304results about "Surgical instruments using microwaves" 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 temperature control, in particular to a multi-dimensional compensation ablation system temperature control system, method and device and a medium. The system calculates a medium texture index representing the structural change of the load medium by synchronously acquiring electrical parameters and ultrasonic image data; constructing an anti-interference control model comprising an extended state observer, and defining energy transmission loss caused by contact thermal resistance as an extended state variable; calculating an adaptive correction factor based on the texture index, dynamically correcting the state updating process of the observer to obtain an energy loss correction estimated value, and constructing a compensation control model to adjust the output power according to the energy loss correction estimated value; according to the invention, the technical problem of incomplete heating caused by false high temperature of the sensor and system misjudgment due to state deterioration of the contact interface is effectively solved; accurate reconstruction and closed-loop compensation of effective heat flow in a non-ideal contact environment are realized, sufficient energy penetration can still be maintained even if contact thermal resistance is sharply increased, and the integrity of an ablation area is guaranteed.

Methods and devices for treating nasal airways are provided. Such devices and methods may improve airflow through an internal and / or external nasal valve, and comprise the use of mechanical re-shaping, energy application and other treatments to modify the shape, structure, and / or air flow characteristics of an internal nasal valve, an external nasal valve or other nasal airways.

An energy delivery device is disclosed that includes an antenna that is operable in a first mode in which the antenna provides microwave energy to tissue and a second mode in which the antenna provides radiofrequency (RF) energy to tissue.

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.

A system (12), comprising: a display device (24); a memory (20) comprising instructions (32); and one or more processors (16) configured by the instructions to: receive an ablation plan comprising plural ablation zones corresponding to plural applicators, the plural ablation zones comprising one or more single ablation zones and one or more composite ablation zones; and provide on the display device a representation of the ablation plan (58) and a visual distinction between sequentially activated applicators and simultaneously activated applicators, the plural applicators comprising the sequentially activated and simultaneously activated applicators.

The invention provides a signal handling unit for handling signals having a first frequency and signals having a second, lower, frequency. The signal handling unit comprises: a signal divider electronically connected to a first port by a common signal line; a first signal branch electronically connecting the signal divider to a second port, wherein the first signal branch comprises a directional interface adapted to: convey only signals at the first frequency from the signal divider to the second port; and a second signal branch electronically connecting the signal divider to a third port, wherein the second signal branch is adapted to convey signals at the first and second frequency from the signal divider to the third port.

The present invention relates to a method (100) for dielectric spectroscopy of a material or a tissue under test, comprising the following steps: measuring (110) the reflection coefficient (11) signal as a function of the frequency of said material or tissue under test, by a vector network analyzer (3), wherein a single applicator (5) is in contact with said material or a tissue under test and wherein the applicator (5) is operatively connected to the vector network analyzer (3); multiplying (120) the reflection coefficient (11) signal with the frequency behavior of an ultra-wide band (UWB) signal as a synthetic applicator excitation; converting (130) the signal of the previous step into the time domain by an Inverse Fourier Transform (IFT); suppressing (140) part of the converted signal of the converting step (130), according to the applicator (5) geometry; converting back (150) the signal of the suppressing step (140) to the frequency domain; and extracting (160) from the frequency signal converted the dielectric properties (162) and / or estimating (170) the dimension of the material or a tissue under test and / or of an ablated area of the material or a tissue under test thereof. The present invention also relates to an apparatus for dielectric spectroscopy (1).

A flexible instrument comprises an antenna having a distal tip portion, a proximal base, and an antenna body therebetween. The antenna body comprises a patterned cylindrical structure having a proximal end coupled to the proximal base and a distal end coupled to the distal tip portion. The flexible instrument is configured to generate a radiation pattern from the antenna to ablate tissue.

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).

An ablation system includes a computing device and an ablation device configured to ablate a target. The computing device is configured to generate a three dimensional model based on functional respiratory imaging data of a patient and to predict an ablation zone based on the functional respiratory imaging data.

A device for heating tissue above a prescribed temperature useful in the treatment of emphysema or COPD is provided. [Solution] A heating energy signal generator and one or more electromagnetic energy signal applicators that receive an output signal from the heating energy signal generator and couple electromagnetic energy from the heating energy signal generator to body tissue, the one or more electromagnetic energy signal applicators having one or more signal applicators selected from the group consisting of electrodes, coils, and antennas, and a controller connected to receive temperature signals indicative of the temperature of the tissue at one or more locations within the body, the controller configured to adjust the heating energy delivered to the body from the heating energy signal generator based at least in part on the temperature signal.

The invention provides an electrosurgical measurement device for acquiring measurements from an electrosurgical system comprising at least one treatment signal line for carrying electromagnetic treatment signals from a generator to an instrument for delivery to a target. The device comprises: a measurement unit adapted to generate a measurement signal having a lower power than the treatment signal; and a coupling unit adapted to couple a measurement signal line connected to the measurement unit to the treatment signal line. The coupling unit is adapted to: transmit a measurement signal from the measurement signal line to the treatment signal line; transmitting a reflected measurement signal from the treatment signal line to a measurement signal line; the reflection treatment signal is prevented from being transmitted from the treatment signal line to the measurement unit. The measurement unit is further adapted to extract a measurement value from the reflected measurement signal.

Methods and devices for treating nasal airways are provided. Such devices and methods may improve airflow through an internal and / or external nasal valve, and comprise the use of mechanical re-shaping, energy application and other treatments to modify the shape, structure, and / or air flow characteristics of an internal nasal valve, an external nasal valve or other nasal airways.

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.

The electrosurgical instrument described herein is designed for sealing and cutting tissue using microwave and radiofrequency energy. The electrosurgical instrument features an instrument shaft with a transmission line to convey electromagnetic energy. The electrosurgical instrument further includes a first jaw with a first surface and a second jaw with a second surface, both attached to the shaft. The jaws can move between open and closed positions to allow tissue insertion and clamping. The electrosurgical instrument is further equipped with three electrodes: the first and second electrodes are positioned on the first jaw, with the first electrode protruding from an isolating portion that electrically isolates it from the second electrode. The third electrode is situated on the second jaw. The configuration enables efficient energy emission for tissue treatment during surgical procedures.

A medical device and method are described for creating a biostable shunt in a septal wall between a right atrium and a. left atrium of a heart. The medical device, such as an ablation device that includes an active portion, is advanced toward a septal wall of the heart such that the active portion is at least partially deflected by the septal wall. An electrical current is delivered to the active portion to provide an ablation of the septal wall from a cut, so as to form a single flap comprising the biostable shunt. The biostable shunt may provide variable flow based on the pressure differential between the right and left atrium.

A system includes, first and second circuitries and one or more devices. The first circuitry is configured to generate a stress signal for reducing an impedance of tissue of an organ. The second circuitry is configured to generate an irreversible electroporation (IRE) signal for producing a lesion in the tissue. The one or more devices are configured to apply to the tissue, the stress signal at a first time interval, and the IRE signal at a second time interval, subsequent to the first time interval.

A chronic and / or acute system and methods of minimally invasive ablation with wire structure devices dispensed through a needle without open cut downs or laparoscopy and using energy forms including radiofrequency, microwave and direct current.

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.

At least some embodiments of the present disclosure relate to systems, devices, and methods for creating a shunt in a patient. In some embodiments, a shunt catheter (302) includes a catheter shaft that includes a shaft lumen and a slicing element (306). In some embodiments, the slicing element includes a slicing element shaft, a piercing element (314), and a slicer (316).

A method is disclosed comprising providing a biological sample on a swab, directing a spray of charged droplets onto a surface of the swab in order to generate a plurality of analyte ions, and analysing the analyte ions.

A system is disclosed including an ablation probe that includes an antenna, a controller in communication with the ablation probe, and a holster device. The holster device is configured to removably receive the ablation probe, wherein the holster device further comprises a switch and, when the ablation probe is mounted in the holster device, the controller is operable to activate the ablation probe upon activation of the switch.

The invention discloses an auxiliary puncture device for an ablation needle and an application method of the auxiliary puncture device, and relates to the field of medical instruments.The auxiliary puncture device comprises a fixing base, the ablation needle is fixedly connected to the base, the needle is sleeved with a sleeve in a sliding mode, the length of the sleeve is matched with that of a microwave emission window, and the fixing base is provided with a switching assembly connected with the sleeve so that the position of the sleeve can be switched to change the working state; the sleeve completely wraps the emission window and part of the needle rod, and only the needle tip is exposed or is flush with the needle tip; and in the second state, the sleeve retracts for avoidance, so that the emission window is exposed. The application method comprises the following steps: locking the cannula in a first state to execute puncture, switching to a second state after reaching a target spot, and starting equipment to complete ablation. The cannula is made of medical-grade metal materials, a gap is reserved between the inner wall and the needle body to prevent friction interference, the emission window can be accurately protected, the problem that weak spots are prone to damage when an existing ablation needle is used for puncturing is solved, microwave energy conduction is not affected, and smooth operation is guaranteed.

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.

The present disclosure provides a system for interrogating tissue comprising a light source for illuminating tissue comprising lesions from ablation and a sensor being configured to receive light to detect autofluorescence from the illuminated tissue. The sensor detects light at a first wavelength in a first wavelength range such that the first wavelength range includes a peak intensity of autofluorescence from the illuminated tissue and detecting light at a second wavelength in a second wavelength range such that the second wavelength range is 20 nm-100 nm longer than the first wavelength range. A processor is programmed to generate a first digital representation of the tissue from light detected in the first wavelength range and a second digital representation of the tissue from light detected in the second wavelength range, and generate a final digital representation from the first and second digital representations. The final digital representation distinguishes between ablated and non-ablated tissue.

The application discloses a microwave drilling operation device and method, and relates to the technical field of medical instruments.The microwave drilling operation device comprises a base, a mechanical arm, a microwave drilling module and a control module; the control module is arranged on the base, the first end of the mechanical arm is fixed on the base, the second end of the mechanical arm is provided with the microwave drilling module, and the mechanical arm and the microwave drilling module are connected with the control module; the microwave drilling module is used for connecting the microwave, the microwave is converted into drilling energy in the microwave drilling mode, and drilling is carried out through the drilling energy; disinfectant gas is connected in the disinfection mode, and the disinfectant gas is converted into disinfectant substances and then outputted according to the microwave; and the control module is used for controlling the movement of the mechanical arm.The application can realize the integration of disinfection and drilling, the drilling process is more efficient and safe, and different operation scenes and drilling angle requirements can be adapted.

This invention relates to catheter and handle assemblies for tissue treatment. More specifically, the invention relates to a catheter assembly having an elongated shaft, an ablation component coupled to one end of the shaft, and a handle coupled to the other end of the shaft. The handle facilitates axial and circumferential positioning of the ablation component via the shaft in an airway, tubing, or blood vessel for tissue treatment. Embodiments include using the handle during treatment of lung diseases such as COPD and asthma to facilitate axial and circumferential positioning of the shaft and ablation component through and independently of the working channel of a bronchoscope.

Devices, systems and methods are provided for treating conditions of the heart, particularly the occurrence of arrhythmias. The devices, systems and methods deliver therapeutic energy to portions the heart to provide tissue modification, such as to the entrances to the pulmonary veins in the treatment of atrial fibrillation. Generally, the tissue modification systems include a specialized catheter, a high voltage waveform generator and at least one distinct energy delivery algorithm. Other embodiments include conventional ablation catheters and system components to enable use with a high voltage waveform generator. Example catheter designs include a variety of delivery types including focal delivery, "one-shot" delivery and various possible combinations. In some embodiments, energy is delivered in a monopolar fashion. However, it may be appreciated that a variety of other embodiments are also provided.

An access device for accessing an intervertebral disc having an outer shield comprising an access shield with a larger diameter (˜16-30 mm) that reaches from the skin down to the facet line, with an inner shield having a second smaller diameter (˜5-12 mm) extending past the access shield and reaches down to the disc level. This combines the benefits of the direct visual microsurgical / mini open approaches and the percutaneous, “ultra-MIS” techniques.