Available Technologies

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Medical Devices

34 available technologies

Vehicle Mounted Crash Impact Attenuator

System and Method for Measuring of Lung Vascular Injury by Ultrasonic Velocity and Blood Impedance

The present invention is a method for assessing capillary permeability to determine vascular lung injury without requiring the injection of radioactive material or requiring the sampling of blood. The method includes measuring impedance and ultrasonic velocity of blood flow through a lung. A hypertonic bolus is injected into the blood flow, and measurements of the blood flow are taken to determine the ultrasonic velocity and the electrical impedance of the blood. These measurements are used to calculate the capillary transport quantity, which is the product of the reflection coefficient for movement of fluid across the capillary barrier and the filtration coefficient. The measured value of the capillary transport quantity can then be compared to a conventional capillary transport quantity for healthy lungs, and one can determine injury by a significant decrease in the measured capillary transport quantity as compared to the standard measurements. Furthermore, a comparison of the osmotic transient graphs of the plotted indicator curves can serve to acknowledge lung vascular injury. Lung injury can be determined from the measured data when the point of osmotic equilibrium (where the indicator curve crosses the baseline) is significantly delayed as compared to the point of osmotic equilibrium plotted for a healthy lung.

Adjustable Universal Platform for Surgical Navigation, Approach, and Implantation

A surgical platform usable for performing a surgical procedure. In one embodiment, the surgical platform comprises a base portion configured to receive at least one probe; a plurality of adjustable legs configured to support the base portion, each adjustable legs having a first end portion and an opposite, second end potion defining a length therebetween; and at least one movable portion configured to adjust the length of at least one adjustable leg.

Direct Laser and Ultraviolet Lithography of Porous Silicon Photonic Crystal Devices

We have developed a technique to process photolithographically porous silicon heterostructures and photonic crystal architectures, using laser and ultraviolet light exposure and a subsequent alcoholic bath treatment. This technique would be the first method to process directly the optical properties of porous silicon multilayers, heterostructures, and photonic crystal architectures.

Trimodal Handheld Probe Based on Raman Spectroscopy and Confocal Imaging for Cancer Detection

This technology relates to a device and method for non-invasive evaluation of a target of interest of a living subject, and in particular to devices and methods that integrate confocal imaging with confocal Raman spectroscopy, for non-invasive evaluation of the biochemical compositions and morphological details of normal and cancerous skin lesions of a living subject.

Helical Peristaltic Nanopump for BioMEMS Devices

A metering rotary nanopump for driving BioMEMS and microfluidic systems.

Split-Tube Flexure

This application describes the design of the split-tube flexure, a unique precision revolute joint that exhibits a considerably larger range of motion and significantly better multi-axis revolute joint characteristics than a conventional flexure. The development of this joint enables the implementation of spatially-loaded revolute joint-based precision machines with well-behaved kinematic and dynamic characteristics and without the backlash and stick-slip behavior that would otherwise prevent precision machine control.

Method for Determining Bone Surface Points Using A-Mode Ultrasound

An A-mode ultrasound transducer is tracked in three-dimensions by an optical position tracking system as the transducer is scanned over the skin to generate measurements of bone surface distance from the transducer. A processor correlates the ultrasound data with position and orientation data to generate a three-dimensional physical space model of the bone surface which is registered with an image space model of the bone surface generated from a tomographic image to produce an alignment of the two models. The ultrasound transducer is replaced by an instrument which is also optically tracked. The alignment is used to translate instrument position in physical space to a position in image space for generation on a monitor of a composite display of the instrument and the tomographic image. This composite display can be used to guide positioning and orienting the instrument in physical space with respect to sites of interest observed in the tomographic image on the display.

Optical Stimulation of the Auditory Nerve

A cochlear implant placed in a cochlea of a living subject for stimulating the auditory system of the living subject, where the auditory system comprises auditory neurons. In one embodiment, the cochlear implant includes a plurality of light sources, {L.sub.i}, placeable distal to the cochlea, each light source, L.sub.1, being operable independently and adapted for generating an optical energy, E.sub.i, wherein i=1, . . . , N, and N is the number of the light sources, and delivering means placeable in the cochlea and optically coupled to the plurality of light sources, {L.sub.i}, such that in operation, the optical energies {E.sub.i} generated by the plurality of light sources {L.sub.i} are delivered to target sites, {G.sub.i}, of auditory neurons, respectively, wherein the target sites G.sub.1 and G.sub.N of auditory neurons are substantially proximate to the apical end and the basal end of the cochlea, respectively.

Combined Raman Spectroscopy- Optical Coherence Tomography (RS-OCT)

An apparatus for evaluating a target of interest of a living subject. In one embodiment, the apparatus has a first light source for generating a broadband light, a second light source for generating a monochromatic light, a beamsplitter optically coupled to the first light source for receiving the broadband light and splitting it into a reference light and a sample light, a reference arm optically coupled to the beamsplitter for receiving the reference light and returning it into the beamsplitter, and a probe having a working end placed proximal to a target of interest of a living subject, optically coupled to the beamsplitter and the second light source for receiving the sample light and the monochromatic light, delivering them from the working end to the target of interest, collecting from the working end a backscattering light and a Raman scattering light that are obtained from interaction of the sample light and the monochromatic light with the target of interest, respectively, and returning the backscattering light into the beamsplitter so as to generate an interference signal between the returned backscattering light and the returned reference light in the beamsplitter.

Apparatus and Method for Three-Dimensional Imaging Using A Stationary Monochromatic X-Ray Beam

A parallel X-ray beam generated from an X-ray generator is radiated onto a CCD of a CCD camera via a metal mesh disposed in front of the CCD. In order to detect the X-ray, a multi-pitch metal mesh (11) is disposed as the metal mesh. The incident position of the X-ray is determined on the basis of a ratio between a primary electron cloud produced by the X-ray spread over a plurality of pixels and a portion of the cloud existing in each of the plurality of pixels.

System for Producing Pulsed Monochromatic X-Rays

A system for generating tunable pulsed monochromatic X-rays includes a tabletop laser emitting a light beam that is counter-propagated against an electron beam produced by a linear accelerator. X-ray photon pulses are generated by inverse Compton scattering that occurs as a consequence of the "collision" that occurs between the electron beam and IR photons generated by the laser. The system uses a novel pulse structure comprising, for example, a single micropulse. In this way, pulses of very short X-rays are generated that are controllable on an individual basis with respect to their frequency, energy level, "direction," and duration.

Microcatheter with Hemodynamic Guide Structure

A catheter device for therapeutic and diagnostic use within a human vascular system in difficult to access locations such as bifurcating cerebral arteries. The distal end of the catheter body comprises a flexible material so that the catheter tip can deflect laterally towards the vessel wall in response to the hemodynamic lift. An intermediate section of the catheter body between the hub and the tip provides a semi-rigid control connection whereby pushing, pulling, and rotation of the hub produces a corresponding movement of the catheter tip.

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