280 results about "Cylindroma" patented technology

An apparatus and method for joining members together using a self-drilling screw apparatus or stapling apparatus are disclosed. The screw apparatus includes a worm drive screw, a spur gear and superior and inferior screws which turn simultaneously in a bi-directional manner. A rotating mechanism drives the first and second screw members in opposite directions and causes the screw members to embed themselves in the members to be joined. The screw apparatus can be used to join members such as bones, portions of the spinal column, vertebral bodies, wood, building materials, metals, masonry, or plastics. A device employing two screws (two-in-one) can be combined with a capping horizontal mini-plate. A device employing three screws can be combined in enclosures (three-in-one). The stapling apparatus includes grip handles, transmission linkages, a drive rod a fulcrum and a cylinder. The staple has superior and inferior segments with serrated interfaces, a teethed unidirectional locking mechanism and four facet piercing elements. The staples can be also be used to join members such as bones, portions of the spinal column, or vertebral bodies.

A human bone substitutional implant comprises a main body and a push body. The main body is a hollow cylinder with a thread portion or a ratchet portion disposed on its outer wall. The thread portion or the ratchet portion has at least a slit dividing it into four equal parts. An inner thread is disposed on the inner wall of the thread portion or the ratchet portion. An outer thread is disposed on the outer surface of the push body and corresponds to the inner thread. The push body and the main body are joined together via screw connection of the outer thread and the inner thread. Because the main body has a conical passage therein, the main body will be held open a certain angle to support and enhance a fractured bone of the human body when the push body is axially pushed into the main body.

An expandable medical device includes a plurality of elongated struts, forming a substantially cylindrical device which is expandable from a cylinder having a first diameter to a cylinder having a second diameter. A plurality of different beneficial agents can be loaded into different openings within the struts for delivery to the tissue. For treatment of conditions such as restenosis, different beneficial agents are loaded into different openings in the device to address different biological processes involved in restenosis and are delivered at different release kinetics matched to the biological process treated. The different beneficial agents may also be used to address different diseases, such as restenosis and acute myocardial infarction from the same drug delivery device.

A covered stent assembly comprising a tubular, expandable stent having a metallic framework covered with a cylinder of biocompatible, non-thrombogenic expandable material, such as heterologous tissue. In a preferred embodiment, the metallic framework is positioned coaxially within a cylinder of bovine pericardial tissue. A catheter may be used to deliver the stent assembly to a desired region in the lumen of a patient. The metallic framework is then expanded to seat the assembly within the lumen.

The invention relates to a multielectrode probe having a silicon substrate which supports multiple conductive electrodes for deep-brain electrical stimulation or recording of neural responses. The substrate has an upper end with multiple conductive portions for bonding to lead wires, and an elongated shank extends from the upper end. The shank supports multiple spaced-apart electrodes, typically ten in number, and conductive traces electrically connect the electrodes and conductive traces. Multiple probes are combined, and supported as an array by a cylindrical alignment cylinder.

In one embodiment, an apparatus for optimizing vision correction procedures comprising: a narrow beam of light directed to a patient's retina; a dynamic defocus and compensation offsetting device configured to offset the defocus of a wavefront from an eye, a wavefront sensor configured to measure the local tilt of a number of subwavefronts sampled around an annular ring (the diameter of which can be dynamically changed) over the wavefront with the defocus offset; and a display device configured to display a two dimensional (2D) data points pattern in real time with each data point location representing a corresponding local tilt of the sampled subwavefronts. A proper defocus offset, not passive compensation, can reveal the predominant feature(s) of other wavefront aberration component(s), thus enabling a refractive surgeon to fine tune the vision correction procedure and minimize the remaining wavefront aberration(s) in real time. Meanwhile, by sampling the wavefront around annular rings and displaying the local tilt of the sampled subwavefronts on a monitor in the form of a 2D data points pattern, a refractive ophthalmic surgeon can easily correlate the measurement result to the two major refractive errors, namely spherical and cylinder refractive errors, including the axis of astigmatism.

A catheter comprising a dual lumen tube with a bolus at its distal end having a bullet nose. A venous port is formed in one side of the bolus adjacent the bullet nose of the bolus. An arterial port is formed in the bolus circumferentially displaced 180° around the catheter from the venous port. The bolus contains a venous passage which transitions from a smaller two-thirds moon shaped cross-section to a larger circular cross-section. The arterial passage has a crescent-moon shaped cross-section. The bullet nose is not as thick as the tube and is inclined on an angle to the axis of the tube so that a portion of its outer periphery is substantially tangent to a hypothetical cylinder containing the trailing edge of the venous port.

A software controlled user interface and calibration method for an eye gaze controlled device, designed to accommodate angular accuracy versus time averaging tradeoffs for eye gaze direction sensors. The method can scale between displaying a small to large number of different eye gaze target symbols at any given time, yet still transmit a large array of different symbols to outside devices with minimal user training. At least part of the method may be implemented by way of a virtual window onto the surface of a virtual cylinder, with eye gaze sensitive symbols that can be rotated by eye gaze thus bringing various groups of symbols into view, and then selected by continual gazing. Specific examples of use of this interface and method on an eyeglasses-like head-mountable, vision-controlled, device are disclosed, along with various operation examples including sending and receiving text messages, control of robotic devices and control of remote vehicles.

An ocular plug design and method of insertion is described for the treatment of dry eye. This ocular plug is generally a narrow rod-like cylinder of appropriate diameter, which may be tapered at one end, for insertion into an ocular channel, such as the punctum or the canaliculus. The plug is prepared from a hydrophilic polymeric material which forms a hydrogel upon absorption of water, but is rigid in its nonhydrated form. The plug is hydrated, formed into a length and diameter which is appropriate for insertion into an ocular channel (i.e., it is elongated), and dried so as to become frozen in its elongated state prior to insertion into the ocular channel. Once inserted into the ocular channel, the plug absorbs water, thereby becoming a hydrogel which is soft and pliable, and it expands to adapt to the size and shape of the patient's punctum or canaliculus. Once the plug expands to the size of a particular ocular channel, the plug is met with resistance from the surrounding tissue. At that point, expansion of the plug ceases and the plug can effectively block tear drainage through the ocular channel.

A cylindrical body is produced which is composed of a fiber structure with a basis weight of 1-50 g / m2 and having a diameter of 0.5-50 mm and a bellows-shaped section, wherein the crest-to-crest spacing of the bellows-shaped section is no greater than 2 mm and the crest-to-valley depth of the bellows-shaped section is 0.01-1 mm; collagen is added to the cylindrical body to produce a composite comprising the cylindrical body and collagen.

The present invention relates to an intramedullary nail distal targeting device (20) adapted to be installed to an external jig system (A) having a proximal attachment (B) to support an intramedullary nail (C) thereon and an extension arm (D) secured to the proximal attachment (B), the nail distal targeting device including a drill guide (21) being defined by an abbreviated cylindrical body (23) having at least a pair of guide slots (24, 24′) each of the guide slots (24, 24′) having a scalloped inner surface (25), an attaching mechanism (22) being provided at the upper portion of the drill guide (21), the attaching mechanism (22) secured in a rotating and sliding manner to a distal end of the extension arm (D) and at least a pair of guide sleeves (10, 10′) being telescopically fitted correspondingly into the slots (24, 24′) of the drill guide (21), each of the guide sleeves (10, 10′) having a scalloped outer surface to correspondingly fit into the guide slots (24, 24′), each of the guide sleeves (10, 10′) being provided with aligned and spaced apart drill-guiding holes (13, 14, 15) extended between the opposed end portions thereof.

A method of determining the size and / or placement of screws or other instruments in pedicles during surgery in a selected spinal area, comprising generating a dimensionally true three-dimensional image of the bony spine in the selected spinal area; hollowing out the vertebra in the three-dimensional image with cortical wall thicknesses selected by a surgeon performing the surgery; determining the narrowest cross section (isthmus) within each pedicle; generating a straight line starting at the center of the isthmus and extending inwardly to a point centered within the anterior cortex so that it is positioned concentrically within the pedicle without touching the walls thereof, the line terminating inside the vertebral body a predetermined distance from the anterior inner cortical wall and extending outwardly in the opposite direction to penetrate the posterior pedicle cortex; expanding the line concentrically and radially to a cross sectional size that is less than that of the isthmus, the line being expanded into a cylinder that stops growing when any portion thereof contacts the inner cortical wall of the hollowed out vertebral body, with the exception of the posterior pedicle cortex; and calculating the ideal pedicle screw or instrument diameter, length and / or trajectory based on the dimensions and trajectory of the cylinder generated for each pedicle. Also, a new and improved method for providing access to the interior of a pedicle for a desired transpedicular procedure, and a new and improved pedicle cannula construction are disclosed herein.

The invention relates to a point cloud data based single tree three-dimensional modeling and morphological parameter extracting method. The point cloud data based single tree three-dimensional modeling and morphological parameter extracting method comprises obtaining three-dimensional surface point cloud data of high density standing trees through a three-dimensional scanner or other live-action measuring modes, calculating the shortest distance from points to root nodes through a k-nearest neighbor graph, performing hierarchical clustering on the data according to distance, enabling centers of clustering hierarchies to be served as framework points of a limb system and meanwhile extracting corresponding semi-diameter of the framework points; connecting the framework points to establish a topological structure of branches and grading the branches; performing three-dimensional geometrical reconstruction on branches through a generalized cylinder body; adding leaf models to the limb system to form into a vivid three-dimensional single tree model; extracting height of trees, diameter of breast height and crown breadth of the standing trees in the point cloud. The point cloud data based single tree three-dimensional modeling and morphological parameter extracting method can rapidly and semi-automatically extract tree important geometrical parameters and topological information to form into the high vivid single tree geometric model and has wide application prospects and values in fields such as agriculture and forestry survey, ecological research and landscape planning.

An arthroeresis-prosthesis (endorthosis) system comprising a sinus tarsi implant for the purpose of blocking abnormal motion between the talus and calcaneus while allowing normal motion and alignment. In a preferred embodiment, the prosthetic device is composed of a non-metallic, specialized medical grade polymer (polyetheretherketone-PEEK) that is a combination of a frustum of a right cine and an axially extending cylinder that is cannulated and partially structured on the exterior surface.

An endovascular prosthesis (100) comprises a structural member (131), which defines, when the prosthesis (100) assumes an expanded state, a substantially tubular structure (111), and two wings (107, 108), which are coupled to a proximal end (118) of the tubular structure (111). If the wings (107, 108) are placed within and in contact with a right circular cylinder (102), which has a diameter of between 2.5 and 3 cm, such that a distal end (119) of the tubular structure (111) is outside the cylinder (102): (a) an axis (116) of the tubular structure (111) defines an angle of between 75 and 90 degrees with an axis (106) of the cylinder (102), (b) the wings (107, 108) at least partially occupy respective arcs (103A, 103B) of the cylinder (102), at least one of which arcs (103A, 103B) has an angle of no more than 180 degrees, and (c) the wings (107, 108) have respective greatest axial lengths (104) along the cylinder axis (106), at least one of which is at least 1.5 times a diameter (122) of the tubular structure (111).

The invention provides a tendon or ligament prosthesis having an undeployed configuration and a deployed configuration. The prosthesis has a resistance to tension in the undeployed configuration that is less than its resistance to tension in the deployed configuration. In the deployed configuration, the prosthesis is capable of twisting and bending. In one embodiment, the prosthesis has a meshwork of filaments woven, knitted or braided into a slender cylinder. In this embodiment, the prosthesis attains the deployed configuration by stretching the prosthesis from its undeployed configuration. The prosthesis may be used, for example, to replace an anterior or posterior cruciate ligament or to treat acromioclavicular joint separation, a rotator cuff tear, lateral collateral ligament tears, medial collateral ligament tears, or medial patello-femoral ligament tears. The invention also provides a method for replacing a tendon or ligament using the prosthesis of the invention.

A method and apparatus are provided for aligning optical elements or microbeads, wherein each microbead has an elongated body with a code embedded therein along a longitudinal axis thereof to be read by a code reading device. The microbeads are aligned with a positioning device so the longitudinal axis of the microbeads is positioned in a fixed orientation relative to the code reading device. The microbeads are typically cylindrically shaped glass beads between 25 and 250 microns (μm) in diameter and between 100 and 500 μm long, and have a holographic code embedded in the central region of the bead, which is used to identify it from the rest of the beads in a batch of beads with many different chemical probes. A cross reference is used to determine which probe is attached to which bead, thus allowing the researcher to correlate the chemical content on each bead with the measured fluorescence signal. Because the code consists of a diffraction grating typically disposed along an axis, there is a particular alignment required between the incident readout laser beam and the readout detector in two of the three rotational axes. The third axis, rotation about the center axis of the cylinder, is azimuthally symmetric and therefore does not require alignment.

Improved methods and apparatuses for treatment of pelvic organ prolapse are provided. A specialized sacral colpopexy mesh having a mesh cylinder attached to a first end of a main mesh is disclosed, and a method for use thereof in abdominal sacral colpopexy. A novel connector that is used to attach a mesh to the needle, including gripping features that improve the grip and allowing for easier connection and disconnection is disclosed, as well as a novel method and apparatus for connecting a mesh to a needle.

The present disclosure is directed to a deep tissue massage device that includes a compliant cylinder formed of compressible material, the cylinder having an external surface with at least one external ridge pattern formed on the exterior surface of the cylinder. The at least one ridge pattern includes a single ridge circumferentially formed on the exterior surface of the cylinder that has a V-shaped branch portion that extends from one end of the single ridge and joins together at a second end of the single ridge to form two opposing Y-shaped ridges.

A stent for implantation in a blood vessel is disclosed, especially in the region of the aortic arch. The stent is comprising rings which are disposed successively in the stent's longitudinal direction and which are made up of meandering circumferential supports. The stent further comprises a prosthesis material which is fixed to the rings and which connects them, thereby forming a hollow cylindrical body with a jacket which is substantially closed on the circumference thereof. At least one connecting support is provided between the last ring and the penultimate ring at the proximal end of the stent and connects these two rings to one another.

The invention relates to a multielectrode probe having a silicon substrate which supports multiple conductive electrodes for deep-brain electrical stimulation or recording of neural responses. The substrate has an upper end with multiple conductive portions for bonding to lead wires, and an elongated shank extends from the upper end. The shank supports multiple spaced-apart electrodes, typically ten in number, and conductive traces electrically connect the electrodes and conductive traces. Multiple probes are combined, and supported as an array by a cylindrical alignment cylinder.

A percutaneous stimulating device 10 comprises a self-contained permanent or long-term unit for neuromodulation in the management of chronic pain and for cosmetic applications in accordance with the invention. It comprises a stimulating zone 12 with one or more electrodes 14, and an integral control unit 16 electrically connected by means of suitable wires 18 to the stimulating zone. The control unit 16 is arranged to supply an electrical stimulating signal to the electrode(s) 14. The device is in the form of a closed cylinder having a diameter of 1.2 to 1.5mm and is no more than 70mm in length so that it can be located and inserted into a patient using a stimulating needle, which is subsequently withdrawn from the patient when the device is in place. The invention extends to a method for long term pain management by means of neuromodulation using the percutaneous device in accordance with the invention to supply a stimulating signal at between 2 and 50Hz.

A punch biopsy apparatus for removing all or a portion of a suspect dermal growth. A punch biopsy apparatus has: a hollow cylinder body; a coring blade at the base of the hollow cylinder body; at least one scooping blade pivotally secured by an axle and a pair of pivot seats within the cylinder body, where each scooping blade is semicircular, a longitudinally-moveable plunger secured within the hollow cylinder, where the plunger has at least one plunger leg for contacting each scooping blade, and each plunger leg transfers longitudinal plunger movement to its respective scooping blade, thereby causing rotational scooping-blade movement. This device helps minimize bleeding and minimize damage to the biopsy sample being retrieved.

Disclosed herein is a stent for connecting adjacent tissues of the organs of a patient. The stent includes a hollow cylindrical body which is formed by weaving a superelastic shape-memory alloy wire in an overlapping manner such that rhombic openings are formed, and wing parts which are provided by expanding respective opposite ends of the hollow cylindrical body outwards and turning the opposite ends inside out on bent portions. The wing parts face each other so that the wing parts are tensed in a longitudinal direction of the cylindrical body. Thereby, the wing parts can elastically move inwards or outwards with respect to the longitudinal direction to automatically adjust a distance between the wing parts in response to the distance between the adjacent tissues of the organs or thicknesses of walls of the organs, so that the wing parts are put into close contact with the adjacent tissues.

There is described a medical examination and / or treatment apparatus with an electromagnet for generating a magnetic field for navigating a medical instrument and an x-ray device having an x-ray source and an x-ray detector attached to a bracket for visual control during the navigation, with the x-ray source and the x-ray detector being arranged on the electromagnet embodied as a hollow cylinder, on the front ends of which are located two ring coils which are arranged in parallel, between which a number of saddle coils arranged in the peripheral direction are arranged, with the hollow cylinder being arranged on a bracket which can be moved about a number of axes.