摘要:
An occluding device having variable stiffness for occluding fluid flow through a lumen of a body vessel. The device comprises a wire having a first end and a second end. The wire is formed with a tapered diameter defined by a continuously decreasing diameter from the first end to the second end. The tapered wire is wound into a primary coil having a primary shape. The primary coil may then be wound into a secondary shape or received within a secondary coil which conforms to the primary shape of the primary coil. The tapered diameter provides the device with a continuously decreasing stiffness from a first end to a second end.
摘要:
In at least one embodiment, a device for introducing a bone cement mixture into a damaged bone of a patient is provided. The device comprises a needle including a proximal portion and a distal portion extending therefrom. An aperture is formed through the distal portion and the distal portion is configured for piercing into the damaged bone. A lumen is formed through the proximal and distal portions and is for advancing the bone cement mixture to the aperture to introduce the bone cement mixture into the damaged bone. The proximal and distal portions are configured for detaching the distal portion from the proximal portion to retain the distal portion within the damaged bone.
摘要:
The disclosure relates to frames suitable for prosthetic implantable valves, and methods of treatment with such frames, to regulate blood flow and to be compliant in percutaneous delivery and, upon implantation, configured to conform to the changing shape of the body vessel or vein. The frames include at least one anchoring member attached to a support member at one or more attachments, and a valve member, preferably a monocuspid valve leaflet, attached to the support member. Preferred frames include two anchoring members with the support member in between the anchoring members. The support member preferably has a semielliptical shape and extends diagonally to sealingly contact the wall of the body vessel.
摘要:
A bolster assembly for use in aligning a tubular interventional device along an outer epidermal layer of a patient. A base portion of the assembly has a first surface for contacting the epidermal layer at an exit site of the tubular interventional device from the body of the patient, and has a second surface generally opposite the first surface. An elongated member is engaged with the base portion second surface and extends therefrom at a first angle. The elongated member and the base portion are structured and aligned to define a passageway to enable passage therethrough of the tubular interventional device. The elongated member is capable of flexure relative to the base portion from the first angle to a second angle generally parallel to the epidermal layer. A retaining member is provided for releasably retaining the elongated member at the second angle.
摘要:
Among other things, there are disclosed embodiments of a biopsy device using relative rotational motion to obtain a full-core biopsy sample. Inner and outer tubular members are provided connected to a handle. Each member includes a slit, and the members are rotatable with respect to each other. The device is inserted into a patient to a sampling site, and with the slits co-oriented, is extended into the sampling site. Tissue enters the tubular members through the slits, and one or both members are rotated to cut off and enclose tissue within the inner tubular member.
摘要:
A system includes a generator with a grinder subgenerator and an ultrasonic subgenerator, a grinder handpiece, and an ultrasonic handpiece. The grinder handpiece is connected in electrical communication with the grinder subgenerator. The grinder handpiece includes a motor and a grinding tool connected mechanically to the motor. The rotational speed of the grinding tool is associated with electrical energy provided by the grinder subgenerator to the motor. The ultrasonic handpiece is connected in electrical communication with the ultrasonic subgenerator. The ultrasonic handpiece includes a transducer and a ball tip connected mechanically to the transducer. The amplitude of the vibrations at the ball tip is associated with electrical energy provide by the ultrasonic subgenerator to the transducer.
摘要:
A filter device assembly and a method of using such a device to capture and remove embolic material from a body lumen or blood vessel are provided. The filter device assembly generally includes a structure having a collapsed state and an expanded state with first, second, and optionally N additional filter members circumferentially attached thereto. Each filter member forms an annulus chamber with the first filter member having porosity P1; the second filter member circumferentially having porosity P2; and the N additional filter members each having porosity [P3 . . . P(2+N)]. The magnitude of the porosity for the first, second, and N additional filter members follows the relationship P1>[P3> . . . >P(2+N)]>P2. The first, second, and N additional filter portions are configured in the expanded state to allow blood to flow there through and to capture emboli in the annulus chambers.
摘要:
Various systems for compressing and loading an expandable medical device into a sheath are disclosed. One system comprises an array of moveable blades radially disposed about a central axis and forming a radially contractible aperture. The blade array includes at least a first plurality of blades and a second plurality of blades. The first plurality of blades is independently moveable with respect to the second plurality of blades. Additional aspects of the invention include methods of using the various compressor systems to compress and load an expandable medical device into a sheath.
摘要:
A device and a method for preparing foam are provided. The device includes a first housing having a first chamber therein and a first movable member positioned at least partially within the first housing. The device also includes a second housing having a second chamber therein, the second chamber being selectively and operably connectable to the first chamber. The second housing further includes a biasing member and a second movable member therein, the biasing member biasing the movable member toward a first end portion of the second housing. The device includes a valve operably connected to the first chamber and the second chamber and movably positionable to selectively control the connection between the first chamber and the second chamber and a handle operably connected to the first movable member and movable to bias the first movable member toward a first end portion of the first housing.