Abstract:
Systems and methods for performing, assessing, and adjusting neuromodulation therapy are disclosed herein. One method for assessing the likely efficacy of neuromodulation therapy includes positioning a neuromodulation catheter at a target site within a renal blood vessel of a human patient and obtaining a measurement related to a diameter of the renal blood vessel via the neuromodulation catheter. The method can further include determining a diameter of the renal blood vessel at or near the target site based on the measurement. In some embodiments, (i) one or more parameters of neuromodulation energy to be delivered to the renal blood vessel can be adjusted based on the determined diameter and/or (ii) the neuromodulation catheter may be repositioned within the renal blood vessel.
Abstract:
A method is described, for use with a native valve (10) of a heart (4) of a subject, the valve being disposed between an atrium (6) and a ventricle (8) of the heart. A first radiopaque marker (32) and a second radiopaque marker (34) are percutaneously advanced to the heart. The first radiopaque marker is placed against a tissue site (42) in the ventricle. The second radiopaque marker is placed against a leaflet (12) of the valve. A distance is measured between the first radiopaque marker at the tissue site, and the second radiopaque marker at the leaflet. Responsively to the measured distance, a chord-length is determined. An artificial chord (60), selected based on the chord-length, is implanted in the heart. Other embodiments are also described.
Abstract:
Devices, systems, and methods for pulse wave velocity determination are disclosed. The apparatus includes an intravascular device that can be positioned within a renal artery. The intravascular device includes a flexible elongate member having a proximal portion and a distal portion. A pressure sensor can be coupled to the distal portion of the flexible elongate member. The pressure sensor can monitor a pressure within the renal artery. At least one imaging element can be coupled to the distal portion of the flexible elongate member. The imaging element can monitor a cross-sectional area of the renal artery. A processing system in communication with the intravascular device can control the monitoring of the pressure within the renal artery and the cross-sectional area of the renal artery. The processor can receive pressure data and cross-sectional area data and determine a pulse wave velocity of fluid within the renal artery.
Abstract:
One aspect of the subject matter described in this disclosure can be implemented in a device capable of estimating blood pressure. The device includes two or more sensors capable of performing measurements along an artery. The device also includes at least one processing unit coupled with the two or more sensors. The processing unit is capable of accessing one or more parameters including a stress-strain parameter based on a hydrostatic pressure calibration. The processing unit also is capable of determining a pulse transit time (PTT) based on the measurements, and determining a pulse wave velocity (PWV) based on the PTT. The processing unit is further capable of determining a blood pressure based on the PWV and the stress-strain parameter.
Abstract:
A surgical system used to determine the presence of a vessel within a region (102) proximate to a working end (104) of a surgical instrument (106) includes at least one light emitter (110) disposed at the working end (104) of the surgical instrument (106), and at least one light sensor (112) disposed at the working end (104) of the surgical instrument (106) and configured to receive light emitted from the at least one light emitter (110) and reflected from the region (102), the at least one light sensor (112) adapted to generate a signal comprising a first pulsatile component and a second non-pulsatile component. The system also includes a controller (114) coupled to the at least one light sensor (112), the controller (114) comprising a splitter (116) to separate the first pulsatile component from the second non-pulsatile component and an analyzer (118) to determine the presence of the vessel within the region (102) proximate to the working end (104) of the surgical instrument (106) based on the first pulsatile component.
Abstract:
Die Erfindung betrifft eine Scananordnung mit einem Scankopf und einer dreidimensionalen räumlichen Struktur, die einen Scanbereich bildet, wobei der Scanbereich (14) mindestens teilweise von einem flächigen, oder einem folienartigen, eine Membran (18) bildenden, Material (16) abgedeckt ist, und wobei das Material (16) flächig, an dem Scanbereich anliegend, gehalten ist, sei es durch Spannung zwischen Rahmenelementen (26, 28) eines Rahmens (30) oder durch Adhäsion, und wobei das Material (16) sich zum Scankopf (12) vorgewölbt erstreckt.
Abstract:
Systems and methods are provided herein that generally involve measuring a prostate or other object. In some embodiments, a finger clip having a roller ring or wheel rotatably mounted thereto is disposed within an inflatable membrane. The roller ring can include a measurement pattern positioned opposite to optical fibers configured to receive light reflected from the measurement pattern. A user can put on the finger clip, position the membrane in proximity to a rectal wall overlying a prostate, and inflate the membrane. As the user slides their finger across the inside of the membrane, which is pressed against the rectal wall, the roller ring can rotate with respect to the fibers such that the fibers move relative to the measurement pattern. A controller can sense light reflected through the fibers from the reference pattern and calculate or estimate various attributes of the prostate based on the reflected light.
Abstract:
The disclosure provides apparatus and methods of promoting and assessing cervical dilation during induction of labor including apparatus that utilizes impedance planimetry for assessment of cervical dilation during cervical ripening with balloon, prior to induction of labor.
Abstract translation:本发明提供了促进和评估引产期间宫颈扩张的装置和方法,包括在引产之前利用阻抗计测法评估宫颈扩张期间使用球囊进行宫颈扩张的装置。 p >
Abstract:
Die Erfindung betrifft eine Bildaufnahmevorrichtung (10) mit einer Scankopfführung (18) für die Bewegung des Scankopfs (20) über einen Scanbereich (42) eines Hohlraums hinweg, welcher Scanbereich (42) sich um den Scankopf (20) erstreckt. Ein flächiges oder folienartiges, elastisch dehnbares Material erstreckt sich zwischen dem Scankopf (20) und dem Scanbereich (42), welches Material nach der Art eines Ballons (12) unter Anwendung von Überdruck an den Scanbereich (42) andrückbar ist. Die Scankopfführung (18) erstreckt sich durch den Ballonanschluss (16) des Ballons (12) zum Scankopf (20). Insbesondere eine Steuervorrichtung (32) ermittelt aus der Verformung des Materials beim Vorliegen des Überdrucks die Form des Hohlraums (40), an dem das Material anliegt.
Abstract:
The present invention relates to apparatus for automatic quantification of a part of vascular structure. It is described to provide (12) at least one first image comprising a spatial representation of a region of interest of a vascular structure, wherein the at least one first image comprises image data representative of a location of a part of a medical device. The medical device is configured to be used in a vascular treatment, and the part of the medical device is configured to be in a plurality of states associated with different phases of the vascular treatment. At least one second image comprising a spatial representation of the region of interest of the vascular structure is provided (14), wherein the at least one second image comprises image data representative of at least a part of the vascular structure in a visible and distinct manner. A location of a feature in the spatial representation of the region of interest of the vascular structure of the at least one first image is determined (18), wherein the feature is associated with the part of the medical device in one of the states associated with a phase of the vascular treatment. A transform relating at least one location in the at least one first image to a corresponding at least one location in the at least one second image is determined (20) and applied to the location of the feature in the spatial representation of the region of interest of the vascular structure of the at least one first image to provide a determined location in the spatial representation of the region of interest of the vascular structure of the at least one second image. Data is output (22) representative of the vascular structure at the determined location.