39 results about "Tissue temperature" patented technology

The invention belongs to the technical field of medical equipment, and provides a bipolar electrotome control method and device, electrosurgical equipment and a storage medium, and the method comprises the steps: obtaining an output voltage, an output current and a tissue temperature; determining a feature vector based on the output voltage, the output current and the tissue temperature; inputting a plurality of feature vector values in the feature vectors into a trained full-connection neural network to obtain a closure degree predicted value, a carbonization risk predicted value and a quality score predicted value; determining a dynamic output power based on the closure degree predicted value, the carbonization risk predicted value, a feature vector and a basic output power; based on the dynamic output power and a preset condition, determining a safe output power through a safe output power calculation formula; controlling the closing action of the bipolar electrotome based on the closing degree predicted value, the safe output power and the closing quality score value; the efficiency of controlling the bipolar electrotome to perform the closing action is improved, the problem of excessive carbonization of tissues is reduced, and the operation safety is greatly improved.

The utility model discloses a plasma operation electrode cutting in-vitro tissue temperature test platform, which comprises a plasma host, a plasma operation electrode, a temperature measurement console, a temperature recorder, a time synchronization controller and a computer, and is characterized in that the plasma operation electrode is connected with an operation electrode interface of the plasma host through a lead; according to the test platform, the plasma operation electrode can be conveniently clamped and fixed by arranging the adjusting sliding block, the annular clamping frame and the anti-skid layer, and the spatial position of the plasma operation electrode clamped and fixed by the electrode clamping mechanism can be conveniently and accurately adjusted in the x direction, the y direction and the z direction by arranging the supporting column, the connecting sleeve, the connecting block, the positioning bolt and the connecting rod; the depth of the plasma operation electrode tool bit fixed on the electrode clamping mechanism inserted into the in-vitro tissue and the distance between the plasma operation electrode tool bit and the temperature measuring probe can be conveniently controlled, so that temperature data of different depths in the in-vitro tissue can be conveniently measured, and the temperature of the in-vitro tissue can be conveniently and accurately measured.

The invention discloses a pressure monitoring device and method for evaluating pressure sore risk, and relates to the technical field of medical equipment. The system comprises a pressure sensing unit used for collecting pressure distribution data between the body surface of a patient and a supporting surface; the distance measuring device is used for measuring the distance between the device and the body surface of the patient. According to the method, information of three different dimensions of pressure distribution, body surface image and deep thermal imaging is subjected to fusion analysis, a pressure sensor positions a high-risk pressed area, a high-definition color image is used for identifying macroscopic skin damage and color change, infrared thermal imaging can penetrate through a surface layer, and the image can be used for identifying the skin damage and color change. According to the method, deep tissue temperature abnormity caused by ischemia and inflammation is sensitively captured, and the three types of information are integrated into a quantitative comprehensive risk score through a weighting algorithm, so that an evaluation result does not depend on subjective experience of nursing personnel any more and is converted into objective and quantifiable accurate diagnosis, and the screening accuracy of high-risk patients is remarkably improved.

A system includes an energy-based surgical instrument having an end effector with two electrodes. One of the electrodes has multiple electrode portions. A generator coupled to the surgical instrument supplies radio frequency (RF) energy to the electrode portions for a tissue coagulation process, and further supplies RF energy at a higher voltage or current to the other electrode portion for a tissue transection process. Control elements monitor tissue impedance or tissue temperature. Other embodiments are described and claimed in this invention.

The invention discloses a multi-sensor joint feedback radiofrequency ablation morphology prediction system, and relates to the technical field of radiofrequency ablation minimally invasive therapy, and the system specifically comprises an ablation signal collection module which processes a signal through a distributed temperature sensor and an impedance detection path and through low-pass filtering and moving average processing; reconstructing a continuous and smooth tissue temperature field from the discrete temperature data; the core parameter calculation module is used for calculating core state parameters based on the temperature field and impedance data, setting a dynamic carbonization threshold value and a carbonization risk index, constructing a real-time necrosis degree index, presenting a necrosis area through a thermodynamic diagram and defining an ablation front edge; and the power self-adaptive closed-loop regulation and control module is used for predicting tissue state change, solving optimal test power through a target optimization function, adding carbonization risk constraint and power boundary limitation, dynamically adjusting output power, periodically updating tissue state data and repeating the whole process to form a closed loop so as to realize self-adaptive regulation and control of the ablation process.

A surgical device includes a handle including at least one user input mechanism and a shaft extending distally from the handle, the shaft including a distal end. In an example, a thermal assembly may be operably coupled to a distal end of a shaft, the thermal assembly including a heating element, where the thermal assembly includes at least one heating element and is electrically coupled to at least one user input mechanism. In an example, a temperature monitoring mechanism may be coupled to a handle, where the temperature monitoring mechanism includes a temperature monitoring technique such that a temperature of at least one of a thermal assembly or a target tissue region of a patient is monitored during a procedure performed with a surgical device, where the temperature monitoring technique includes a fiber Bragg grating technique.

The invention relates to the technical field of thermal therapy, in particular to an MRI imaging-based ultrasonic-assisted thermal therapy system, which is characterized in that the MRI imaging-based ultrasonic-assisted thermal therapy system comprises an MRI imaging module, a heat source module, an ultrasonic monitoring module and a control module, and the control module comprises a data fusion processing unit, a closed-loop power control unit and a mechanical arm trajectory planning unit; by means of multi-source fusion of MRI temperature mapping, ultrasonic real-time imaging and optical fiber temperature sensing, low-delay and high-precision tissue temperature and state monitoring is achieved, prediction-correction closed-loop control based on the Pennes equation is combined, the temperature control precision and the response speed are improved, a multi-focus and track type combined heating strategy is supported, the treatment time is greatly shortened, and the treatment effect is improved. According to the invention, the MRI compatible mechanical arm and the wearable fixing device are matched, high repeated positioning and flexible probe pose optimization are realized, the stability and safety of the treatment process are ensured through a multi-stage safety interlocking and redundancy monitoring mechanism, and efficiency, accuracy and clinical applicability are considered in thermal ablation treatment.

A laser therapy device comprises a pulsed laser light source. Each triggering of tissue irradiation causes application of a first heating laser pulse of a first power and a first pulse duration and at least a second heating laser pulse of a second power and a second pulse duration to the tissue. Changes in volume resulting from the rising and the decreasing power gradient of the first laser pulse are detected. The therapy device, on the basis of the measured values relative to the change in volume and taking into consideration at least the predetermined rises of the power gradients of the first heating laser pulse, determines an estimated value for the temperature increase in the tissue during irradiation of the first heating laser pulse, and generates, from the estimated value, a command that causes adjustment of the second power and / or the second pulse duration of the second laser pulse.

Methods for increasing local blood circulation in soft tissue, treating musculoskeletal tissue, and treating soft tissue of a subject are described. Continuous, non-pulsed ultrasound energy can be applied to a target tissue region, such as with a wearable ultrasound transducer. The ultrasound energy can be delivered at an intensity suitable for sustained application for at least 60 minutes. A statistically significant increase in local blood circulation can be achieved within 10 minutes of initiating application, occurring before a statistically significant increase in tissue temperature. In some embodiments, a topical non-steroidal anti-inflammatory drug (NSAID) is applied to the target region during ultrasound application. In some embodiments, local blood circulation is monitored using laser Doppler flowmetry until a statistically significant increase in perfusion units is detected. The increase in local blood circulation can be effective to alleviate pain and accelerate recovery from a soft tissue injury.

The application provides an intraoperative real-time optical coherence imaging guided laser ablation treatment system, which comprises an optical guiding module, a laser treatment module and a real-time monitoring and feedback module; high-resolution three-dimensional information and blood vessel function information obtained by the optical coherence imaging guiding module are used to accurately segment the region of a tumor site, and the power and irradiation time of a radiation laser light source are accurately controlled according to the information; meanwhile, a temperature sensor monitors the tissue temperature at any time, and the system pauses laser diagnosis and treatment when the temperature exceeds the set threshold range, so that precise laser ablation treatment is realized; the application aims to overcome the problems that the current laser ablation treatment lacks real-time and accurate segmentation of tumor regions and lacks real-time monitoring and feedback of the tissues around the tumor during the operation, so that real-time and accurate laser ablation treatment of the tumor site during the operation is realized.

The invention discloses a water-cooling radiofrequency ablation needle, which relates to the technical field of medical appliances, and comprises an ablation needle body, an electrode tube is arranged at the front end of the ablation needle body, a radiofrequency electrode is arranged in the electrode tube, the end part of the radiofrequency electrode extends out of the electrode tube, the end part of the radiofrequency electrode is fixedly connected with a temperature probe, and the temperature probe is of a conical structure. The lower bottom face of the temperature probe abuts against the end face of the electrode tube. Through the arrangement, the temperature probe can be closer to a nervous tissue ablation part, the influence of an intermediate medium on temperature conduction is reduced, accurate detection of the temperature of an ablation area is achieved, the temperature probe is of a conical structure, the tip design facilitates the temperature probe to penetrate through the tissue more smoothly and make direct contact with target nervous tissue, and compared with other shapes, the temperature probe is more convenient to use. The conical structure can reduce the tissue resistance, and the real tissue temperature can be obtained faster and more accurately.

A device for studying the relation between tissue temperature and electrical impedance comprises a tissue placing container, a heating and heat preservation subsystem and a tissue temperature and electrical impedance testing subsystem, and has the characteristics that (1) various general instruments are not stacked any more, the subsystems are controlled in a centralized mode, accurate synchronization is facilitated, and (2) the degree of automation is high, temperature adjustment is convenient, and time and labor are saved. The whole temperature adjusting scheme and the whole testing scheme can be set at a computer end at one time, and manual control is not needed in the middle process; (3) the highest heating power is high and can reach 2kW or even higher, and rapid heating is supported; heat transfer modes are various, water bath heating comprises heat radiation and heat conduction modes, and the heat transfer efficiency is high; and (5) due to large specific heat of water, heat preservation and constant temperature of tissues are facilitated, measurement of low-frequency impedance is facilitated, and impedance spectrum measurement of frequencies below 100Hz is successfully covered.

A system comprising: a catheter comprising: a therapy delivery element disposed on a distal portion of an elongate body; a sensor; and a control circuit configured to: cause the therapy delivery element to deliver a first medical therapy to tissue within or adjacent to a vessel wall of a vessel of a patient during a first therapy cycle; determining a first temperature of the tissue at a first location during the first therapy cycle; responsive to determining that the first temperature meets a threshold temperature, causing the therapy delivery element to terminate the delivery of the first medical therapy; determining a second temperature of the tissue at a second location; and responsive to determining that the second temperature meets one or more criteria, causing the therapy delivery element to deliver a second medical therapy to the tissue during a second therapy cycle.

A system includes an energy-based surgical instrument with an end effector having two electrodes. One of the electrodes has multiple electrode portions. A generator coupled to the surgical instrument supplies radio-frequency (RF) energy to an electrode portion for a tissue coagulation process and further supplies RF energy at a higher voltage or current to another electrode portion for a tissue transection process. A control element may monitor tissue impedance or tissue temperature. Other embodiments are described and claimed.

The application is suitable for the technical field of medical devices, and provides a device and a method for long-term in-vivo monitoring of fascia chamber pressure and temperature. The device comprises: an indwelling catheter having a hollow inner cavity constituting a pressure conducting channel; a pressure sensor in sealed communication with the pressure conducting channel, for monitoring the pressure in the fascia chamber; a temperature sensor fixed to the outer wall of the indwining catheter and physically isolated from the pressure conducting channel, for monitoring the tissue temperature in the fascia chamber; a main control module electrically connected with the pressure sensor and the temperature sensor, for receiving and processing pressure signals and temperature signals to generate monitoring data; and a transmission module for transmitting the monitoring data to a terminal device. The application physically isolates the temperature sensor from the pressure conducting channel, thereby ensuring the accuracy of pressure measurement, and improves the evaluation accuracy through joint determination of two parameters, and can realize remote centralized monitoring and improve the monitoring efficiency.

The invention discloses an intelligent urinary incontinence control system which comprises a balloon assembly matched with the vagina, a pressure sensing unit, a control unit, a driving unit, an auxiliary unit and the like. The balloon assembly is made of a biocompatible elastic material, urethral closure pressure and pressure change in the abdominal cavity are monitored in real time through the pressure sensing unit, the control unit predicts the urinary incontinence risk based on difference data and a machine learning algorithm, and the driving unit dynamically adjusts the balloon dilatation degree to enhance the urethral closure pressure. The system is further integrated with a temperature sensing module, a state indication module and the like, and tissue temperature monitoring and abnormal alarm are achieved. According to the invention, through double-sensor fusion monitoring, intelligent algorithm adjustment and multi-parameter safety control, a closed loop of'precise monitoring-intelligent decision-dynamic adjustment 'is formed, the problems of extensive pressure control, insufficient comfort and the like of a traditional device are solved, a minimally invasive, intelligent and safe solution is provided for female urinary incontinence, and the urine control efficiency and the patient experience are improved.

This invention discloses a COMSOL-based method and system for dynamic simulation of the three-dimensional temperature field in microwave liposuction. The method comprises: Step 1, constructing a three-dimensional geometric model of the skin tissue-microwave liposuction antenna coupling system; Step 2, establishing a multi-physics coupling model, including bidirectional coupling of the electromagnetic wave-frequency domain physical field and the biological heat transfer physical field; Step 3, setting dynamic coupling boundary conditions, calculating and updating the blood perfusion rate in real time based on the current tissue temperature, and feeding it back to the heat transfer calculation in the next time step, thereby realizing the dynamic feedback coupling of electromagnetic heat generation and the temperature field; Step 4, using a transient fully coupled solver to jointly solve the electromagnetic wave-frequency domain physical field and the biological heat transfer physical field to obtain the spatiotemporal distribution data of the three-dimensional temperature field of the skin tissue during microwave liposuction. This invention achieves accurate simulation of the microwave liposuction process by introducing dynamic physiological parameters and bidirectional multi-physics coupling.

The invention relates to a thermal ablation temperature history reconstruction and three-dimensional damage mapping method based on CT thermal imaging end point temperature constraint, and belongs to the technical field of medical image processing and biothermal modeling. The method comprises the following steps: acquiring CT thermal imaging data at a thermal ablation ending moment, and constructing a three-dimensional terminal temperature field of an ablation area; based on the consistency of tissue temperature evolution forms under a fixed ablation clinical protocol, constructing a normalized temperature history template function; reconstructing the discrete time point temperature history of each spatial position in the ablation area by using the temperature history template function; based on the temperature history obtained through reconstruction, a thermal damage evaluation model is introduced for time integration or mapping calculation, and a thermal damage quantized value of each spatial position is obtained; and generating a three-dimensional tissue damage distribution diagram according to the thermal damage quantized value, and visually displaying the three-dimensional tissue damage distribution diagram. According to the method, the quantitative evaluation of the tissue thermal damage in the thermal ablation process can be realized without a real-time temperature monitoring or invasive temperature measuring device.

A surgical device, comprising a handle including at least one user input mechanism and a shaft extending distally from the handle, the shaft including a distal end. In examples, a thermal assembly can be operably coupled to the distal end of the shaft, including a heating element, wherein the thermal assembly includes at least one heating element and is electrically coupled to the at least one user input mechanism. In examples, a temperature monitoring mechanism can be coupled to the handle, wherein the temperature monitoring mechanism includes temperature monitoring technology such that a temperature of at least one of the thermal assembly or a targeted tissue area of a patient is monitored during a procedure with the surgical device, wherein the temperature monitoring technology includes Fiber Bragg Grating technology.

The invention discloses a power control system and method for a semiconductor laser therapeutic instrument, and particularly relates to the technical field of laser equipment control. According to the power control system and method, starting, continuing and ending stages are divided based on treatment time, and the strategies of initial penetration, continuous adaptation and gradual power reduction are correspondingly adopted; in the continuous treatment stage, the skin impedance amplitude and tissue temperature biological parameters of a patient are collected, and in combination with personalized dynamic reference values generated by the age, gender and pre-treatment initial parameters of the patient, a state index is calculated and power is dynamically adjusted, so that individual differences and treatment requirements of different patients are met, the curative effect is considered, and excessive treatment is avoided; the problem that in the prior art, power control lacks individualized and dynamic self-adaptive capacity is solved.

The embodiment of the utility model discloses a fluorescence temperature measurement closed-loop control device and a laser instrument, belongs to the technical field of laser medicine, and can automatically control the transmitting power of a laser according to hyperplasia tissue temperature measurement data. The device comprises: a semiconductor laser module for irradiating the hyperplasia tissue with a first wavelength laser; the fluorescent temperature measurement module is used for collecting a fluorescent afterglow signal of the hyperplasia tissue in a temperature environment through the fluorescent probe; and the main control module is connected with the semiconductor laser module and the fluorescence temperature measurement module, and is used for receiving a feedback signal sent by the fluorescence temperature measurement module and sending a control signal carrying the emission power information of the first wavelength laser to the semiconductor laser module.

In part, the disclosure relates to an electromagnetic radiation (EMR) delivery system for non-invasive surface tissue temperature monitoring. The system includes a first source of EMR having a first wavelength range; a second source of EMR having a second wavelength range; and a tissue contacting material comprising a set of wavelength range specific EMR responsive dopants. In various embodiments, the tissue contacting material is positioned on a surface of a target region of tissue, wherein the tissue contacting material receives EMR from the first source, wherein the tissue contacting material receives EMR from the second source. The first and second sources may be arranged in different orientations or along a common axis or orientation.

A system, the system comprising: a catheter comprising: an elongate body; and a therapy delivery element disposed on a distal portion of the elongate body; a temperature adjusting element; and a control circuit configured to cause the temperature adjusting element to adjust a temperature of a vessel wall at a target location within a vessel, where the temperature adjusting element is configured to adjust the temperature of the vessel wall to an initial temperature away from the vessel wall; comparing the temperature adjustment time with a threshold time; causing the temperature adjustment element to terminate adjustment of the temperature of the vessel wall at the target location based on determining that the temperature adjustment time is greater than or equal to the threshold time; and causing the therapy delivery element to deliver neuromodulation energy to tissue of the vascular wall adjacent the target location.

The invention provides a target region tissue thermal treatment temperature distribution control method and system based on ultrasonic temperature measurement. The method comprises the following steps: acquiring an ultrasonic image sequence of a target region tissue under the condition that the target region tissue is preheated at a first temperature; calculating ultrasonic thermal strain according to the ultrasonic image sequence to obtain a temperature image of the target region tissue at the first temperature; according to the temperature image, the physical property parameters and the biological heat transfer equation of the target region tissue, determining individual parameters representing the thermal treatment sensitivity; determining target thermal treatment power according to the target temperature, the treatment time and the individual parameters of thermal treatment; and determining the temperature distribution of the tissue plane of the target region along with the time change according to the biological heat transfer equation and the individual parameters under the target thermal treatment power. Individual thermal sensitivity evaluation and target tissue temperature closed-loop control can be achieved by combining individual parameter measurement under the non-invasive condition, and the safety and accuracy of the thermal treatment process are improved.

The present application relates to the technical field of medical rehabilitation and physical therapy, and particularly relates to a highland closed-loop controlled cervical and lumbar deep tissue precise thermotherapy and temperature monitoring system, comprising the following modules: a physiological signal acquisition module, which is used for acquiring the surface temperature, deep tissue temperature, microcirculation blood flow and muscle group electrophysiological signal of the cervical and lumbar region, and synchronously calibrating each signal to form multi-parameter physiological state data; a highland physiological compensation model construction module, which is used for performing highland environment physiological compensation on the tissue heat transfer coefficient and heat dissipation rate according to the blood oxygen level and blood flow velocity in the physiological state data, and obtaining the tissue heat transfer parameters which are corrected by the highland characteristics. In the present application, the multi-parameter physiological signals are acquired and the highland physiological compensation is performed, the deep temperature is controlled by combining the closed-loop thermotherapy and safety monitoring, and then the individualized dynamic adjustment precise thermotherapy is formed, so that the problem that the deep temperature is difficult to stabilize caused by the fixed power heating of the traditional cervical and lumbar thermotherapy is improved.

Technologies are provided for estimation and monitoring of temperature of tissue of a living subject, while the tissue is being cut m an interventional procedure. Temperature may be estimated by measuring impedance of the tissue directly using a. cutting tool that cuts the tissue. Changes to the operation of the cutting tool can be caused in response to the temperature of the tissue satisfying or exceeding a threshold value.

The invention discloses an emergency treatment tibiofibula fracture nursing device, and relates to the technical field of medical instruments, the emergency treatment tibiofibula fracture nursing device comprises a shield, the side wall of the shield is hinged to a sticky plate, one end of the sticky plate is arranged on the outer side of the shield, locking blocks are symmetrically arranged on the outer side of the shield, a linkage plate is arranged between the locking blocks on the two sides, and a linkage rope is arranged on the two locking blocks; an arc-shaped groove is formed in the outer side of the protective cover, an arc-shaped plate is arranged on the outer side of the arc-shaped groove, a plurality of sets of screws are arranged between the linkage plate and the arc-shaped plate, a protective plate is arranged on the outer side of the arc-shaped plate, and an open groove is formed in the protective plate. The resilience force of the springs can push the nursing plate to be continuously attached to the skin, stable supporting force is kept, the comfort level of a patient is improved, and further development of swelling is inhibited by reducing the temperature of local tissue and reducing local blood exudation and tissue fluid generation.

A system and method are provided for ablating target tissue during ablation, measuring parameters such as the temperature of the target tissue, and predicting the ablation volume based on the measured parameters. The system may include: a switched antenna used both for heating the target tissue and for radiation measurement to monitor the temperature of the heated tissue; and a processor used for calculating the temperature of the target tissue, segmenting medical images, and predicting the ablation volume based on a radiation signal indicating the temperature of the target tissue. The predicted ablation volume may be adapted to take into account tissue boundaries and anatomical structures. The processor may further determine the properties of the target tissue, such as tissue type.

A surgical device comprising: a handle comprising at least one user input mechanism; and a shaft extending distally from the handle, the shaft comprising a distal end. In an example, a thermal assembly is operably couplable to the distal end of the shaft, the thermal assembly comprising a heating element, wherein the thermal assembly comprises at least one heating element and is electrically coupled to the at least one user input mechanism. In an example, a temperature monitoring mechanism is couplable to the handle, wherein the temperature monitoring mechanism comprises a temperature monitoring technology such that a temperature of at least one of the thermal assembly or a target tissue region of a patient is monitored during a procedure utilizing the surgical device, wherein the temperature monitoring technology comprises at least one infrared sensor.

A method of treatment includes modifying and / or killing cells by changing the cell membrane charging time to make the cells more susceptible to the influence of electric fields. The method may further include inserting one or more electrodes into tissue, acquiring a temperature of the tissue, delivering electrical energy to the tissue by electrical pulses, determining a rate of energy delivery of the electrical energy such that the temperature rises above a first critical temperature but remains below a second critical temperature, and delivering the electrical energy until a specific dose is achieved.