摘要:
A tubular structure having variable support includes a tubular member and a structural support member with a flexible tubular member over the structural support member, such that the flexible tubular member can engage and disengage or squeeze and release the structural support member. The structural support member can be a tubular mesh, stent, framework, skeleton, braid or other flexible framework. A fluid passage can be used to inflate and deflate the flexible tubular member. Methods of assembly and methods of use are also described.
摘要:
Retraction and aspiration devices, systems, and methods are disclosed herein. One aspect of the present technology, for example, is directed toward an apparatus for use with a catheter system configured to enable intravascular delivery of an interventional device to a treatment site in a blood vessel. The apparatus can include a housing configured to be releasably coupled to a proximal portion of the catheter system and an actuation mechanism coupled to the housing. The actuation mechanism can include a lever movably coupled to the housing, a locking portion configured to engage a portion of the catheter system, and a pressure source coupled to the housing and the actuation mechanism. Movement of the lever simultaneously activates the pressure source to generate pressure, and moves the locking portion to engage and retract at least a portion of the catheter system.
摘要:
Described herein are apparatus, compositions, systems and associated methods to occlude structures and malformations of the vasculature with radiopaque hydrogel filaments with delayed controlled rates of expansion. Further described is a device for implantation in an animal comprising a difunctional, low molecular weight ethylenically unsaturated shapeable macromer; an ethylenically unsaturated monomer; and a radiopaque element, wherein said device contains no support members. Methods of forming such devices are also disclosed.
摘要:
In order to provide a catheter which can be operated even when it is deformed inside a bent blood vessel and whose movable part can be easily bent and the movable part thus bent is firmly kept in this shape, a catheter includes: a fluid-driven actuator including: a balloon; a restricting member for restricting inflation of the balloon in a short axis direction of the catheter; and a tube which is less stretchable in a long axis direction of the catheter than the balloon is, according to a cross-sectional view of the fluid-driven actuator taken along the short axis direction of the catheter, the tube being eccentrically provided with respect to the restricting member.
摘要:
Catheter including an inner tubular member having a fluid lumen defined therein and an exterior surface. The exterior surface defining a first distal flow port and a second distal flow port. An outer tubular member is movable relative to the inner tubular member in a proximal direction and having an interior surface. A first pressure chamber is defined between the exterior surface and the interior surface, and between a first distal seal assembly and a first proximal seal assembly. A second pressure chamber is defined between the exterior surface and the interior surface, and between a second distal seal assembly and a second proximal seal assembly. Fluid introduced through the fluid lumen pressurizes the first pressure chamber and the second pressure chamber to generate a respective force at the first proximal seal assembly and to the second proximal seal assembly to urge the outer tubular member in the proximal direction.
摘要:
Retraction and aspiration devices, systems, and methods are disclosed herein. One aspect of the present technology, for example, is directed toward an apparatus for use with a catheter system configured to enable intravascular delivery of an interventional device to a treatment site in a blood vessel. The apparatus can include a housing configured to be releasably coupled to a proximal portion of the catheter system and an actuation mechanism coupled to the housing. The actuation mechanism can include a lever movably coupled to the housing, a locking portion configured to engage a portion of the catheter system, and a pressure source coupled to the housing and the actuation mechanism. Movement of the lever simultaneously activates the pressure source to generate pressure, and moves the locking portion to engage and retract at least a portion of the catheter system.
摘要:
A thrombectomy catheter deployment for operation of a thrombectomy catheter includes a stand alone drive unit and a disposable pump/catheter assembly which is manually placed into a carriage assembly in the drive unit. The pump/catheter assembly has a plurality of preconnected components including tubular structure and a thrombectomy catheter connected thereto and is transported into or out of the interior of the drive unit for automatic high pressure pump piston head engagement or disengagement with a reciprocating linear actuator and for automatic engagement of disengagement of an effluent waste tube with a roller pump. A barcode reader senses specific operational data pertaining to an individual pump and provides an interface for operation of the reciprocating linear actuator.
摘要:
A system for generating a mechanical wave is disclosed. The system comprises a camshaft having plurality of rotatable cams, serially mounted on a shaft along an axis of an elastic tubular shell to form a varying phase angle along the shaft. The system further comprises a plurality of cam followers arranged circumferentially about each cam, such that a rotary motion of the cams generates a linear motion of the cam followers to radially bias in internal wall the shell. The variation of the phase angle is selected to generate a three-dimensional traveling wave along the shell.
摘要:
An endoscopic device capable of autonomous locomotion through a body cavity with a pre-established direction of displacement, comprising a tubular body (1) made of an elastic material extending between two, front (2) and rear (3) end portions respectively comprising pneumatically actuated anchoring means (4) for temporarily and alternately attaching said end portions to the wall of the body cavity in synchronism with corresponding axial extensions and contractions of the tubular body. The tubular body incorporates a reinforcement structure (6, 7) distributed along its length that is substantially rigid in the radial direction and yielding in the axial direction. The tubular body wall is formed by superimposed inner (9) and outer (10) layers, the reinforcement structure being incorporated therebetween. Through openings (11, 12, 13) are formed on the outer layer for allowing air possibly entered between the inner layer and the outer layer from the inside of the tubular body to be discharged to the outside.
摘要:
The present invention provides a self-withdrawing catheter device for injection of material into a body passageway, comprising: a) a highly-flexible elongated shaft including at least one injection channel, attachable to a syringe; b) a canopy attached to the shaft near the distal end, the canopy providing smooth self-withdrawal of the catheter from within a body passageway, due to backward fluid pressure exerted upon said canopy after injection of material through said catheter. The invention also provides a surgical method and kit for fistular repair, comprising the afore-mentioned catheter, an additional balloon catheter for injecting fluids to clear a fistula, a debriding brush, a guide wire for aiding in inserting the components into the fistula, and hooks and ties for connecting these elements and drawing them into the fistula.