1671results about "Computer-aided surgery" patented technology

A technique for detecting and indicating an internal anatomical obstacle encountered during insertion of a medical device into the body of a patient, comprising an elongated member such as a tube, catheter, guidewire, or other device, having a location indicating element, such as a permanent magnet, flexibly coupled to its distal end, and an external detector that tracks and displays the location and orientation of the location indicating element. The flexible coupling has sufficient stiffness to maintain the orientation of the location indicating element against the forces from both gravity and flowing blood within a patient's vasculature, but allows the location indicating element to change orientation if it encounters an obstacle during insertion. The medical caregiver monitors the detector's display and determines encounters with obstacles by observing changes in the orientation of the location indicating element.

The invention is a device for application in the sterile area for controlling an electric instrument provided in the non-sterile area, with the sterile area being separated from the non-sterile area substantially by a covering. The invention comprises at least one sensor responsive to the magnetic field which is provided in the non-sterile area and a unit generating a magnetic field is provided in the sterile area. The at least one sensor responsive to the magnetic field and the unit generating a magnetic field are separated from each other at least by the covering. The unit generating the magnetic field is disposed relative to the at least one sensor responsive to a magnetic field so that a variation of the magnetic field in space and / or time, which is induced by the unit generating the magnetic field, is detectable by the at least one sensor responsive to the magnetic field and a sensor signal can be generated. A controller unit is provided that generates a control signal for controlling the electric instrument in response to the sensor signal.

A medical system for finding and displaying the location of electrodes within the body. The electrodes may be used to measure the voltage on the heart wall and display this as an activation map on a geometry representing the heart chamber.

The present invention is directed toward a fiber optic position and shape sensing device and the method of use. The device comprises an optical fiber means. The optical fiber means comprises either at least two single core optical fibers or a multicore optical fiber having at least two fiber cores. In either case, the fiber cores are spaced apart such that mode coupling between the fiber cores is minimized. An array of fiber Bragg gratings are disposed within each fiber core. A broadband reference reflector is positioned in an operable relationship to each fiber Bragg grating wherein an optical path length is established for each reflector / grating relationship. A frequency domain reflectometer is positioned in an operable relationship to the optical fiber means. In use, the device is affixed to an object. Strain on the optical fiber is measured and the strain measurements correlated to local bend measurements. Local bend measurements are integrated to determine position or shape of the object.

Sinusitis and other disorders of the ear, nose and throat are diagnosed and / or treated using minimally invasive approaches with flexible or rigid instruments. Various methods and devices are used for remodeling or changing the shape, size or configuration of a sinus ostium or duct or other anatomical structure in the ear, nose or throat; implanting a device, cells or tissues; removing matter from the ear, nose or throat; delivering diagnostic or therapeutic substances or performing other diagnostic or therapeutic procedures. Introducing devices (e.g., guide catheters, tubes, guidewires, elongate probes, other elongate members) may be used to facilitate insertion of working devices (e.g. catheters e.g. balloon catheters, guidewires, tissue cutting or remodeling devices, devices for implanting elements like stents, electrosurgical devices, energy emitting devices, devices for delivering diagnostic or therapeutic agents, substance delivery implants, scopes etc.) into the paranasal sinuses or other structures in the ear, nose or throat.

Systems and methods employing a small guage steerable catheter (30) including a locatable guide (32) with a sheath (40), particularly as an enhancement to a bronchoscope (14). A typical procedure is as follows. The location of a target in a reference coordinate system is detected or imported. The catheter (30) is navigated to the target which tracking the distal tip (34) of the guide (32) in the reference coordinate system. Insertion of the catheter is typically via a working channel of a convention bronchoscope. Once the tip of the catheter is positioned at the target, the guide (32) is withdrawn, leaving the sheath (40) secured in place. The sheath (40) is then used as a guide channel to direct a medical tool to target.

Apparatus and methods are provided for determining in near realtime the position of a probe placed within a living body. Electric currents are driven between one or more electrodes on the probe and electrodes placed on the body surface. The impedance between the probe and each of the body surface electrodes is measured, and three-dimensional position coordinates of the probe are determined based on the impedance measurements. Dynamic compensation is provided for changing impedance of the body surface and its interface with the electrodes, resulting from such causes as electrode peel-off and changes in moisture and temperature. The compensation improves the accuracy of, inter alia, medical procedures, such as mapping the heart or performing ablation to treat cardiac arrhythmias.

A method includes positioning body-electrodes in galvanic contact with a body of a patient and positioning a mapping-tool, having a mapping-electrode, in a plurality of regions in the body. The method further includes tracking the mapping-tool at different positions in each of the regions using a location-measuring system, and for each region, generating a respective set of calibration-currents between the body-electrodes and the mapping-electrode at the different positions in the region. A respective relation is derived for each region between the respective set of the calibration-currents and the different positions, and is used in determining the location of an investigation-tool in response to the different respective relations and investigation-tool-currents.

A medical probe includes an insertion tube, having a longitudinal axis and having a distal end. A distal tip is disposed at the distal end of the insertion tube and is configured to be brought into contact with a body tissue. A joint couples the distal tip to the distal end of the insertion tube. A joint sensor, contained within the probe, senses a position of the distal tip relative to the distal end of the insertion tube. The joint sensor includes first and second subassemblies, which are disposed within the probe on opposite, respective sides of the joint and each include one or more magnetic transducers.

Methods are disclosed for assessing the condition of a cartilage in a joint and assessing cartilage loss, particularly in a human knee. The methods include converting an image such as an MRI to a three dimensional map of the cartilage. The cartilage map can be correlated to a movement pattern of the joint to assess the affect of movement on cartilage wear. Changes in the thickness of cartilage over time can be determined so that therapies can be provided. The amount of cartilage tissue that has been lost, for example as a result of arthritis, can be estimated.

Described herein are methods and systems for precisely placing and / or manipulating devices within the body by first positioning a guidewire or pullwire through the body from a first location, around a curved pathway, and out of the body through a second location, so that the distal and proximal ends of the guidewire extend from the body, then pulling a device into position using the guidewire. The device to be positioned within the body is coupled to the proximal end of the guidewire, and the device is pulled into the body by pulling on the distal end of the guidewire that extends from the body. The device may be bimanually manipulated by pulling the guidewire distally, and an attachment to the device that extends proximally, allowing control of both the proximal and the distal ends. In this manner devices (and particularly implants such as innerspinous distracters, stimulating leads, and disc slings) may be positioned and / or manipulated within the body. Devices to modify tissue may also be positioned or manipulated so that a target tissue within the body is modified.

Augmented reality apparatus (10) for use during intervention procedures on a trackable intervention site (32) are disclosed herein. The apparatus (10) comprises a data processor (28), a trackable projector (14) and a medium (30) including machine-readable instructions executable by the processor (28). The projector (14) is configured to project an image overlaying the intervention site (32) based on instructions from the data processor (28). The machine readable instructions are configured to cause the processor (28) to determine a spatial relationship between the projector (14) and the intervention site (32) based on a tracked position and orientation of the projector (14) and on a tracked position and orientation of the intervention site (32). The machine readable instructions are also configured to cause the processor to generate data representative of the image projected by the projector based on the determined spatial relationship between the projector and the intervention site.

A method and apparatus of automatically locating in an image of a blood vessel the lumen boundary at a position in the vessel and from that measuring the diameter of the vessel. From the diameter of the vessel and estimated blood flow rate, a number of clinically significant physiological parameters are then determined and various user displays of interest generated. One use of these images and parameters is to aid the clinician in the placement of a stent. The system, in one embodiment, uses these measurements to allow the clinician to simulate the placement of a stent and to determine the effect of the placement. In addition, from these patient parameters various patient treatments are then performed.

Closure systems for applying a closure motion to an anvil assembly of a surgical instrument. In various embodiments, the surgical instrument includes a cable drive knife assembly and the anvil assembly thereof is moved to a closed position when contacted by a closure tube assembly that has a pushing force applied thereto. Other embodiments include closure systems that may be actuated by rotary motion. Various lockable articulation joints are also disclosed.

An electromechanical surgical system having an instrument housing for connecting with a shaft assembly, a shaft assembly, and an end effector. The end effector is an articulating end effector and the system includes a cable tensioning system for tensioning the articulation cables. The system includes a clutch mechanism for preventing slippage of a drive cable.

Disclosed herein are devices, systems and methods for the automated design and manufacture of patient-specific / patient-matched orthopedic implants. While the embodiments described herein specifically pertain to unicompartmental resurfacing implants for the knee, the principles described are applicable to other types of knee implants (including, without limitation, other resurfacing implants and joint replacement implants) as well as implants for other joints and other patient-specific orthopedic applications.

A surgical instrument is disclosed. The surgical instrument includes a control unit and a staple cartridge including a transponder. The control unit is configured to transmit a first wireless signal to the transponder and to receive a second wireless signal from the transponder to determine one of a first electronic state and a second electronic state of the transponder based on the second wireless signal.

An implantable material for deployment in select locations or select tissue for tissue regeneration is disclosed. The implant comprises collagen, ceramics, and or other bio-resorbable materials or additives, where the implant may also be used for therapy delivery. Additionally, the implant may be “matched” to provide the implant with similar physical and / or chemical properties as the host tissue.

A system comprised of custom radiographically designed tibial and talar cutting guides, a tibial reaming guide and bit, and instrumentalities for use in total ankle replacement surgery and a computer-based system and method for making the custom radiographically designed tibial and talar cutting guides.

The present invention is directed toward a fiber optic position and shape sensing device and the method of use. The device comprises an optical fiber means. The optical fiber means comprises either at least two single core optical fibers or a multicore optical fiber having at least two fiber cores. In either case, the fiber cores are spaced apart such that mode coupling between the fiber cores is minimized. An array of fiber Bragg gratings are disposed within each fiber core and a frequency domain reflectometer is positioned in an operable relationship to the optical fiber means. In use, the device is affixed to an object. Strain on the optical fiber is measured and the strain measurements correlated to local bend measurements. Local bend measurements are integrated to determine position and / or shape of the object.

A method of manufacturing an arthroplasty jig is disclosed herein. The method may include the following: generate two dimensional image data of a patient joint to undergo arthroplasty, identify in the two dimensional image data a first point corresponding to an articular surface of a bone forming the joint, identify a second point corresponding to an articular surface of an implant, identify a location of a resection plane when the first point is correlated with the second point, and create the arthroplasty jig with a resection guide located according to the identified location of the resection plane.

The present invention is directed toward a fiber optic position and shape sensing device and the method of use. The device comprises an optical fiber means. The optical fiber means comprises either at least two single core optical fibers or a multicore optical fiber having at least two fiber cores. In either case, the fiber cores are spaced apart such that mode coupling between the fiber cores is minimized. An array of fiber Bragg gratings are disposed within each fiber core and a frequency domain reflectometer is positioned in an operable relationship to the optical fiber means. In use, the device is affixed to an object. Strain on the optical fiber is measured and the strain measurements correlated to local bend measurements. Local bend measurements are integrated to determine position and / or shape of the object.

A method for position sensing includes inserting a probe comprising at least one electrode into a body of a subject, and passing electrical currents through the body between the at least one electrode and a plurality of locations on a surface of the body. Respective characteristics of the currents passing through the plurality of the locations are measured in order to determine position coordinates of the probe.

A medical probe, consisting of a flexible insertion tube, having a distal end for insertion into a body cavity of a patient, and a distal tip, which is disposed at the distal end of the flexible insertion tube is configured to be brought into contact with tissue in the body cavity. The probe also includes a coupling member, which couples the distal tip to the distal end of the insertion tube and which consists of a tubular piece of an elastic material having a plurality of intertwined helical cuts therethrough along a portion of a length of the piece.