920 results about "Dissection" patented technology

An ultrasonic surgical instrument for dissection and coaguation of tissue is provided. The surgical instrument includes a vibration coupler supported within a housing and operably connected to an ultrasonic generator. An angled blade member is connected to the distal end of the vibration coupler to conduct high frequency vibration from the ultrasonic generator to the blade member. A clamp member is positioned adjacent to the blade member and is movable from a first position to a second approximated position. The clamp member and angled blade member combine to enhance contact between the tissue and the blade member during operation of the instrument to improve the performance of the instrument.

An ultrasonic clamp coagulator assembly that is configured to permit selective cutting, coagulation, and fine dissection required in fine and delicate surgical procedures. The assembly includes a clamping mechanism, including a clamp arm cam-mounted at the distal portion of the instrument, which is specifically configured to create a desired level of tissue clamping forces. The balanced blade provides a functional asymmetry for improved visibility at the blade tip and a multitude of edges and surfaces, designed to provide a multitude of tissue effects: clamped coagulation, clamped cutting, grasping, back-cutting, dissection, spot coagulation, tip penetration and tip scoring. The assembly also features hand activation configured to provide an ergonomical grip and operation for the surgeon. Hand switches are placed in the range of the natural axial motion of the user's index or middle fingers, whether gripping the surgical instrument right-handed or left handed.

Methods and devices described herein facilitate improved access of locations within the body by providing a variety of dissection modes on a single access device.

An ultrasonic surgical instrument for dissection and coagulation of tissue is provided. The surgical instrument includes a vibration coupler supported within a housing and operably connected to an ultrasonic generator. An angled blade member is connected to the distal end of the vibration coupler to conduct high frequency vibration from the ultrasonic generator to the blade member. A clamp member is positioned adjacent to the blade member and is movable from a first position to a second approximated position. The clamp member and angled blade member combine to enhance contact between the tissue and the blade member during operation of the instrument to improve the performance of the instrument.

A torsional dissection tip and method of use comprising a longitudinal-torsional resonator having a cutting surface at a distal end with cutting teeth of a pitch optimized to the torsional or longitudinal displacement of the distal tip. Utilization of the present art torsional dissection tip allows a surgeon to easily remove hard tissues such as bone without moving the present art instrument to any site except that which is to be dissected.

A ligation device includes a cannula having first and second extendable members and a Doppler wand. The Doppler wand permits an anatomical vessel, such as a blood vessel, to be located in close proximity to the distal end of the cannula. The extendable members are extendable on two opposite sides of the vessel. A length of ligation material, such as suture material, extends through the first extendable member, and is attached to a detachable element mounted to the distalmost end of the extendable member. The second extendable member includes a snare. The first extendable member includes curved portions which, when the member is extended distally, extend the detachable element into position for the snare so that the snare can grab the loop. Once ensnared, the detachable element is released from the first extendable member, which pulls the ligation material around the vessel. The ligation device does not require prior visualization or dissection of the area around the vessel.

A knee prosthesis, methods of implanting the prosthesis, method of treating arthritis of the knee, and a kit therefore are provided. The prosthesis answers many of the limitations of current knee prosthetic devices by providing a two-component (or alternatively, an optional three-component) device, as either a single structure, or as separate pieces. One of the components is constructed of low friction material, while the second is composed of a weight-dissipating cushioning material; the optional third component is constructed of low friction material. The prosthesis is initially attached to surrounding soft tissue in the knee by biodegradable sutures; it is held permanently in place by fibrous ingrowth into a porous collagen rim in the cushioning component. Major improvements provided by the present invention over currently available prostheses include minimal incisions, minimal or no bone cuts, minimal overall dissection (these improvements lead to shorter hospital stays and rapid rehabilitation and fewer potential for side effects), less prosthetic wear, greater longevity, fewer activity restrictions, able to be used on young, large, active patients, ease of revision, ease of conversion into a total knee arthroplasty if needed.

The present invention provides systems, apparatus and methods for selectively applying electrical energy to body tissue in order to incise, dissect, harvest or transect tissues or an organ of a patient. The electrosurgical systems and methods are useful, inter alia, for accessing, dissecting, and transecting a graft blood vessel, such as the internal mammary arteries (IMA) or the saphenous vein, for use in a by-pass procedure. A method of the present invention comprises positioning an electrosurgical probe adjacent the target tissue so that one or more active electrode(s) are brought into at least partial contact or close proximity with a target site in the presence of an electrically conductive fluid. A high frequency voltage is then applied between the active electrode and one or more return electrode(s). During application of the high frequency voltage, the electrosurgical probe may be translated, reciprocated, or otherwise manipulated such that the active electrode is moved with respect to the tissue. The present invention volumetrically removes the tissue at the point of incision, dissection, or transection in a cool ablation process that minimizes thermal damage to surrounding, non-target tissue.

A surgical instrument for the dissection of bone and other tissue includes a spindle, a dissection tool and an coupler disposed between the spindle and the dissection tool. The coupler includes a tool collet and an attachment locking mechanism operable to permit tool collet operation and telescoping movement of an attachment tube with respect to the dissection tool. A method is also provided for convenient coupling of the dissection tool and adjustment of the attachment tube length.

Intraoperative devices are described that assist the surgeon in identifying the location and characteristics of tissues and structures. Devices are also described that have the added capability of marking the location of the identified tissues and structures. This invention also includes devices that can selectively ablate adjacent tissues while avoiding damage and trauma to the identified tissues and structures by combining ablation with sensing, where sensing of either tissue properties, markings made by another device or surgeon, or a reference probe can be used. Devices are also described that protect tissue in the proximity of reference markings or probes by closed loop inhibition of the ablation process. The devices, systems, methods and kits described are adapted and configured to facilitate locating a target structure or target tissue within a body of a mammal, including nerves, peripheral nerves, blood vessels, and tubes such as the ureter. The devices, systems and methods may discriminate between different tissues by exploiting the electrical, mechanical, and physiological properties of the body.

A balloon device useful for dissecting tissue or retracting tissue for the purpose of providing access for laparoscopic surgery, the device comprising a balloon which inflates to a shape specially suitable for the surgical procedure and the anatomical region of deployment. The present device, when configured with a tapered dissection balloon, is particularly useful for subfascial endoscopic perforator surgical procedures.

Techniques for fabricating a device include forming a fabrication layout, such as a mask layout, for a physical design layer, such as a design for an integrated circuit, and identifying evaluation points on an edge of a polygon corresponding to the design layer for correcting proximity effects. Techniques include correcting for proximity effects associated with an edge in a first fabrication layout by determining whether any portion of the edge corresponds to a target edge in a design layer. The first fabrication layout corresponds to the design layer that indicates target edges for a printed features layer. If any portion of the edge corresponds to the target edge, then it is determined whether to establish an evaluation point on the edge. Then it is determined how to correct the edge for proximity effects based on the evaluation point. In case it is determined that no portion of the edge corresponds to the target edge, then no evaluation point is selected on the edge.

A polymer of hydrophobic monomers and hydrophilic monomers is provided. It is also provided a polymer blend that contains the polymer and another biocompatible polymer. The polymer or polymer blend and optionally a biobeneficial material and / or a bioactive agent can form a coating on an implantable device such as a drug delivery stent. The implantable device can be used for treating or preventing a disorder such as atherosclerosis, thrombosis, restenosis, hemorrhage, vascular dissection or perforation, vascular aneurysm, vulnerable plaque, chronic total occlusion, patent foramen ovale, claudication, anastomotic proliferation for vein and artificial grafts, bile duct obstruction, ureter obstruction, tumor obstruction, or combinations thereof.

Tension-slide techniques and reconstruction systems for tendon surgical repairs. The technique improves the biomechanics of the combined fixation and helps overcome surgeons' concerns about rapid return to ADLs. The technique reliably seats the tendon against the distal cortex of the bone socket, maximizing the surface area for bone to tendon healing. The technique takes advantage of cortical fixation, while providing the unique advantage of minimizing gap formation and minimizes surgical dissection by performing the surgery through a single incision technique.

The foregoing application describes a system and method of performing a minimally invasive surgical operation. More specifically, the invention involves the use of disposable cannula and slender dilators of variable lengths, which incorporate a source of illumination to carry light to a surgical site and video capabilities for capturing and displaying images from a CMOS or CCD camera device. According to one embodiment, fiber optics run semi-circumferentially or along walls of the cannula / dilator and terminate at about a centimeter from the distal end of the cannula / dilator, thereby preventing illumination from “bottoming out” at the floor of the incision. According to one alternate embodiment, the light fibers may be fashioned in an annulus around one or more camera chips to provide illumination and video of the surgical site. In still another embodiment, the light fibers may be replaced by light emitting diodes in a more remote light source or alternatively at the distal-tip of the CMOS or CCD camera device.

The Annulus Fibrosus Stent (AFS) is a platform of barriers used in the intervertebral disc. The barrier can be inserted into an intervertebral disc to act to reinforce and / or supplement the disc. The AFS can be inserted at any of the many different stages of disc pathology. The AFS can be inserted to prevent pressure and dissection of disc material which in and of itself can decrease and / or eliminate pain from damaged AF fibers. The AFS can be inserted before disc pathology progresses to a substantial event such as a disc herniation. It can be inserted at any time in the progression of the natural history of disc disease. It can even be inserted when substantially the entire intervertebral disc has been removed. It can be inserted in conjunction with another procedure such as a Nucleus Pulposus Replacement (NPR) or Total Disc Replacement (TDR), etc. The various shapes and material of the AFS in this patent are designed to address particular clinical situations, particular anatomy and particular stages of disc degeneration. The AFS can be inserted directly through the AF, or by a technique of detaching part of the AF with bone without actually cutting a substantial part of AF fibers or layers of fibers or by the Transosseous approach.

A polymer of fluorinated monomers and hydrophilic monomers is provided. It is also provided a polymer blend that contains a polymer of fluorinated monomers and another biocompatible polymer. The polymer of fluorinated monomers or polymer blend described herein and optionally a bioactive agent can form a coating on an implantable device such as a drug-delivery stent. The implantable device can be used for treating or preventing a disorder such as atherosclerosis, thrombosis, restenosis, hemorrhage, vascular dissection or perforation, vascular aneurysm, vulnerable plaque, chronic total occlusion, patent foramen ovale, claudication, anastomotic proliferation for vein and artificial grafts, bile duct obstruction, ureter obstruction, tumor obstruction, or combinations thereof.

Optical coherence tomography (OCT) is used to map the surface elevation and thickness of the cornea. The OCT maps are used to plan laser procedures for the treatment of an irregular, opacified or weakened cornea, and in the treatment of refractive errors. In the excimer laser phototherapeutic keratectomy (PTK) procedure, the OCT data is used to plan a map of ablation depth needed to restore a smooth optical surface. In the excimer laser photorefractive keratectomy procedure, OCT mapping of epithelial thickness is used to achieve clean laser epithelial removal. In femtosecond laser anterior keratoplasty procedure, OCT data is used to plan the depth of femtosecond laser dissection to remove an anterior layer of the cornea, leaving a smooth recipient bed of uniform thickness to receive a disk of donated corneal tissue. The linkage of an OCT system to a precise laser surgical system enables the performance of new procedures that are safer, less invasive and produce faster visual recovery than conventional surgical procedures.

Balloon cannula systems may be used for accessing and visualizing the spine and related methods of treatment, including a forward-looking balloon system for creating a working space and the balloon system having atraumatic dissection capability to allow visualization in spine. The devices and methods described may be used, for example, to perform annulus repair, herniated disc excision, and denervation of neurological tissue; to dispense pharmacological agents and / or cell or tissue therapy agents; to diagnose disc degeneration and bony degeneration, spinal stenosis, and nucleus decompression, and to perform disc augmentation.

A surgical device including an elongated shaft having a distal end and a proximal end, an arm pivotally connected to the distal end and moveable through a dissection plane, and a cutting element disposed on the arm and adapted to move from an un-deployed configuration to a deployed configuration, wherein the cutting element is generally aligned with the dissection plane when in the un-deployed configuration and at least partially transverse with respect to the dissection plane when in the deployed configuration.

A system and method for treating and repairing complex anatomy characterized by a plurality of vessel portions oriented at various angles relative to each other. The system including a graft device that is capable of being assembled in situ and has associated therewith a method that avoids the cessation of blood flow to vital organs. A delivery catheter system and various graft supporting, mating and anchoring structures are additionally included.

The present invention provides cryotherapy treatment of dissections in a blood vessel of a patient. The present invention further provides cryotherapy treatment of side branch occlusion in a bifurcated blood vessel. One method for treating potential or existing dissections in a blood vessel comprises cooling the blood vessel to a temperature and for a time sufficient to remodel the blood vessel such that dissections of the blood vessel are reduced. Another method for treating side branch occlusion in a bifurcated blood vessel, the bifurcated blood vessel having a side branch and a main branch, the main branch having plaque disposed thereon, comprises cooling an inner surface of the main branch to a temperature and for a time sufficient to inhibit plaque shift from the main branch into the side branch.

Endoluminal prosthetic devices having fluid-absorbable compositions for repair of vascular tissue defects, such as an aneurysm or dissection, are disclosed herein. A prosthesis for repairing an opening or cavity within a target vessel region configured in accordance herewith includes a tubular body sized to substantially cover the opening or cavity, and having channels formed in a wall thereof. The channels can include a fluid-absorbable composition deposited therein and which is configured to absorb fluid (e.g., blood) and swell within the channels, thereby providing radial expansion of the tubular body in situ.

A dermatological skin treatment device is provided. The device comprises a handpiece and a cutting tool, wherein the tool is inserted through the conduit and percutaneously inserted into a tissue disposed within a recessed area of the handpiece. The device and method cut the fibrous structures under the skin that cause cellulite at an angle substantially parallel to the surface of the skin and replace these structures with a non-cellulite forming structure by deploying a highly fibrous mesh through a single needle hole to create a highly fibrous layer directly or through wound healing processes.

A polymer of fluorinated monomers and hydrocarbon monomers is provided. It is also provided a polymer blend that contains a polymer formed of fluorinated monomers and hydrocarbon monomers and another biocompatible polymer. The polymer or polymer blend described herein and optionally a bioactive agent can form an implantable device such as a stent or a coating on an implantable device such as a drug-delivery stent, which can be used for treating or preventing a disorder such as atherosclerosis, thrombosis, restenosis, hemorrhage, vascular dissection or perforation, vascular aneurysm, vulnerable plaque, chronic total occlusion, claudication, anastomotic proliferation for vein and artificial grafts, bile duct obstruction, ureter obstruction, tumor obstruction, or combinations thereof.