Abstract:
The invention is a tissue ablation system including an ablation device having an electrode array configured for the ablation of tissue, wherein the electrode array includes a plurality of conductive wires electrically isolated and independent from one another and configured to receive electrical current from a source and emit radiofrequency (RF) energy in response. The ablation system further includes a controller configured to control an emission pattern from the electrode array, either by independently controlling activation of one or more conductive wires or by actively blocking emission of energy from a selected one or more conductive wires or by adjusting flow of a conductive fluid for carrying RF energy emitted in a virtual electrode arrangement. Accordingly, the system provides a user with custom ablation shaping including custom, user-defined ablation geometries or profiles for RF emission in a desired shape or pattern so as to deliver targeted treatment to marginal tissue.
Abstract:
Provided is an apparatus, system, and method for managing radio frequency (RF) and ultrasonic signals output by a generator that includes a surgical instrument comprising an RF energy output and an ultrasonic energy output and a circuit configured to receive a combined RF and ultrasonic signal from the generator, where the circuit may be configured to filter frequency content of the combined signal and is configured to provide a first filtered signal to the RF energy output and a second filtered signal to the ultrasonic energy output or the circuit may be configured to switch between outputs of the surgical instrument.
Abstract:
Disclosed is a cryotherapy device comprising at least one inflow channel, at least one outflow channel, control means for controlling the evacuation of expanded cryo-fluid from a body lumen, wherein the control means receive data from at least one sensor that gathers data regarding at least one parameter of the body lumen and wherein the cryotherapy device is introduced into the body lumen via an endoscope.
Abstract:
A method, system, and device for predicting lesion quality. Specifically, lesion quality may be predicted based on an assessment of pulmonary vein occlusion using saline injection and evaluation of temperature measurements recorded by a thermocouple located distal to the cryoballoon of the treatment device. The quality of the occlusion may be rated based on the time it takes the temperature recorded by the thermocouple to increase from approximately 2 °C to approximately 38 °C, the rate of temperature change over a predetermined time period, and/or the rate of dissipation within the pulmonary vein of the saline with a volume of contrast medium. For example, the quality of the occlusion may be rated as being good, fair, or poor. This assessment may be quickly and easily communicated to an operator.
Abstract:
Système pour l'ablation ou le contrôle d'une zone du coeur par ultrasons comprenant : un moyen de mesure de l'activité électrique du coeur pour l'acquisition d'un électrocardiogramme (ECG); un réseau de phase pour la génération d'un faisceau de signaux ultrasonores focalisé (Fus) sur au moins une zone ciblée (Zc ) du coeur; un système d'imagerie déterminant une image d'une paroi transcostale projetée dans un plan image du réseau de phase (RES_US) en prenant en considération la position et l'orientation du réseau de phase et permettant de désactiver des éléments du réseau de phase en fonction de la position desdits éléments vis-à-vis de la position de l'image projetée de la paroi transcostale; un système de positionnement couplé au réseau de phase (RES_US) de manière à asservir la position d'au moins une zone focalisée d'au moins un faisceau de signaux ultrasonores focalisé (Fus) sur la position de la au moins une zone ciblée (Zc), un système de contrôle capable de mesurer une température et une déformation tissulaire dans la zone ciblée (Zc ); un dispositif de mesure d'un niveau de cavitation dans la zone ciblée.
Abstract:
Système de stimulation cardiaque ultrasonore comprenant : un moyen de mesure de l'activité électrique du coeur pour l'acquisition d'un électrocardiogramme (ECG); un moyen de génération d'un faisceau de signaux ultrasonores focalisé (Fus) sur une zone ciblée (Zc), lesdits signaux étant calibrés pour générer une stimulation électrique dans une zone du coeur, ladite génération du faisceau étant synchrone avec un premier instant choisi de l'électrocardiogramme (ECG), la génération du faisceau correspondant à une impulsion dont la durée est inférieure à 80ms; un moyen de localisation de la zone ciblée (Zc) couplé à un moyen de positionnement du moyen de génération du faisceau focalisé (Fus) de sorte à asservir ledit faisceau de signaux ultrasonores focalisé (Fus) dans la zone ciblée (Zc), ledit moyen de localisation étant synchronisé avec le moyen de génération du faisceau de signaux focalisés (Fus); un même moyen de contrôle capable de suivre en temps réel une température et une déformation tissulaire dans la zone ciblée (Zc), ledit moyen de contrôle relevant des mesures de manière synchrone avec le rythme de l'électrocardiogramme.
Abstract:
Systems and methods for delivering a drug or other therapy over an extended period of time (e.g., several hours, days, weeks, months, years, and so forth) are disclosed herein, as are systems and methods for monitoring various parameters associated with the treatment of a patient. Systems and methods are also disclosed herein that generally involve CED devices with various features for reducing or preventing backflow.
Abstract:
The invention relates to a heat sink parameter determination apparatus for determining a parameter of a heat sink like a blood vessel within an object such as a person(3) by minimizing a deviation between a measured temperature distribution, which has preferentially been measured by ultrasound thermometry, and a modeled temperature distribution, wherein the modeled temperature distribution is modeled based on a provided heat source parameter like the location of an ablation needle (2) and the heat sink parameter to be determined by using a given thermal model. This determination of heat sink parameters, which may be geometric and/or flow parameters, considers the real temperature distribution and is thus based on real heat sink influences on the temperature distribution. This can lead to an improved determination of heat sink parameters and hence to a more accurate temperature distribution which may be determined based on the determined heat sink parameters.
Abstract:
A device, system and method for temperature-based lesion formation assessment and mapping functionality using an accessory usable with an over-the-wire balloon catheter. The device may include a first annular element, a plurality of wires coupled to the first annular element, and a second annular element, the plurality of wires passing from the first annular element through the second annular element and into an elongate wire conduit coupled to the second annular element. At least one of the plurality of wires may include at least one temperature sensor and/or at least one mapping electrode. The first annular element coupled to an outer surface of a sheath. As a balloon catheter is advanced out of the sheath lumen, the distal tip of the catheter engages the second annular element and pushes the wires out of the sheath lumen, everting them over the balloon of the catheter.
Abstract:
Devices, systems, and methods for the selective positioning of an intravascular ultrasound neuromodulation device are disclosed herein. One aspect of the present technology is directed to positioning systems for focused ultrasound devices. Some embodiments, for example, are directed to dual-balloon positioning systems. Such systems can include, for example, an elongated shaft and a therapeutic assembly and a balloon assembly carried by a distal portion of the elongated shaft. The therapeutic assembly is configured for delivery within a blood vessel. The balloon assembly can include a first balloon and a second balloon circumferentially offset from the first balloon about the elongated shaft. The first and second balloons can be selectively inflated to position an ultrasound transducer of the therapeutic assembly at a precise location within the blood vessel.