摘要:
The present invention provides a valve configured for insertion on the proximal and distal sides of a heart valve annulus to replace the heart valve of a patient. The valve comprises a first substantially annular portion adapted to be positioned on a proximal side of the annulus of a patient and a second substantially annular portion adapted to be positioned on a distal side of the annulus of a patient, wherein at least one of the first and second substantially annular portions is movable towards the other portion to a clamped position to clamp around the annulus. The second portion has a flow restricting portion extending therefrom and is movable between a first position to permit the flow of blood and a second position to restrict the flow of blood. In one embodiment, the valve has a suture joining the first and second portions to draw the first and second portions into closer proximity and a cinch member to secure the suture to maintain the first and second portions in the clamped position. In another embodiment, the first and second portions are connected by a first segment which biases the first and second portions toward the clamped position.
摘要:
A vessel filter comprising first and second filtering portions and first and second anchoring portions. A transverse dimension of the first filtering portion in an expanded configuration is less than a transverse dimension of the anchoring portion in an expanded configuration, and a transverse dimension of the second filtering portion is less than a transverse dimension of the second anchoring portion. The first and second filtering portions are positioned closer to each other than the first and second anchoring portions, and the anchoring portions are formed on first and second opposite portions of the vessel filter. Preferably a sleeve is positioned between the first and second filter portions.
摘要:
A surgical introducer sheath comprising a first member having a first longitudinally extending lumen dimensioned to receive a surgical instrument therethrough, a second member having a second longitudinally extending lumen dimensioned to receive the first member, and a retainer adjacent a distal portion of the second member movable from a first retracted position to a second extended position to limit proximal movement of the introducer sheath. Rotational movement of the second member in a first direction moves the retainer to the extended position and rotational movement of the second member in a second direction moves the retainer to a retracted position.
摘要:
A vessel filter comprising a first filtering portion and a first anchoring portion with a transverse dimension of the filtering portion in an expanded configuration being less than a transverse dimension of the anchoring portion in an expanded configuration, and a second filtering portion and a second anchoring portion with a transverse dimension of the second filtering portion being less than a transverse dimension of the second anchoring portion. The first and second filtering portions are positioned closer to each other than the first and second anchoring portions, and the anchoring portions are formed on first and second opposite portions of the vessel filter. At least one anchoring member having a sharpened edge for engaging the vessel wall is positioned on the anchoring portions.
摘要:
Apparatus for clearing lumens of thrombolytic material, comprising a motor including a control therefor operable using one hand holding the motor; an elongated wire connected to the motor for rotation by the motor; a catheter for enveloping a length of the wire; and a grip facilitating manual rotation of the catheter by the one hand independently of the wire as the wire is rotated by the motor at a speed sufficient to create a standing wave in a portion of the wire extending from the catheter.
摘要:
A surgical vascular introducer sheath comprising first and second members and a retainer. The first member has a lumen for receiving a surgical instrument therethrough and a first side opening in an outer wall in fluid communication with the first lumen. The second member has a lumen and a side opening in fluid communication with the second lumen, wherein at least a portion of the first member is positioned within the second lumen of the second member. The retainer is positioned at a distal portion of the first member and is movable from a first retracted position to a second extended position to limit proximal movement of the introducer in response to movement of the first member.
摘要:
Atherectomy device for removing plaque from the interior of a lumen comprising a rotatable head having a nose, central portion and tail portion. The nose position is bulbously outwardly curved, the tail portion defines a rear extremity of the head and is rectangular in transverse cross-section and tapered, and the central portion tapers from the circular nose portion to the tail portion.
摘要:
A stationary central dialysis catheter having a planar axially elongated sinuous tubular member having a plurality of axially extending lumens therein and at least a part having a predetermined two-dimensional shape including at least two portions of relative straightness connected by a curved portion region. At least two of said lumens each have at least one aperture for passage of fluid during dialysis, and said apertures are axially displaced from one another along said tubular member. A flexible sheath surrounding at least a part of the tubular member is peelably removable therefrom in situ. Ripcord means is provided in the form of a suture embedded in said flexible sheath and looped around at the distal portion to define a line of weakness separable first adjacent the suture loop for rupturing said sheath in a proximal direction.
摘要:
An irrigating bladder dethrombulator for removing blood clots in the urine. The device includes a housing having an outflow conduit insertable into the bladder through the urethra for transporting bodily fluid from the bladder and a bladder pressurization conduit for transporting fluid into the bladder to increase the internal pressure of the bladder. Connected to the housing is structure for mechanically reducing the size of the blood clots in the urine. The mechanism for driving the reducing structure can be a magnetic drive or a fluid drive.
摘要:
A needle assembly 10 compromising an infusion needle 11 that includes a needle cannula 13 made of a superelastic material such as Nitinol. The needle cannula is cold-worked or heat annealed to produce a preformed bend 16 that can be straightened within passageway 21 of a coaxial outer cannula 12 for introduction into the body of a patient. Upon deployment from the outer cannula, the needle cannula substantially returns to the preformed configuration for the introduction or extraction of materials at areas lateral to the entry path of the needle assembly. The needle assembly can compromise a plurality of needle cannulae than can be variably arranged or configured for attaining a desired infusion pattern.