A flow blocking catheter including an inner tube, a flow blocking member and an outer tube is provided. The flow blocking member is self-expandable and sleeved on an exterior of the inner tube. At least a proximal end of the self-expandable flow blocking member is attached to an outer circumference of the inner tube. The outer tube is movably sleeved on the exterior of the inner tube to restrict an expansion of the flow blocking member. In this way, expansion of the flow blocking member is able to be controlled simply by pushing/retracting the outer or inner tube to offer a fast shifting between different configurations. The flow blocking member is able to occlude blood flow with a controllably expansion to lower stimulation to the wall of the blood vessel and avoid the easy bursting of the balloon.

A flow blocking catheter including an inner tube, an outer tube and a flow blocking member is provided. The flow blocking member has one end attached to an outer circumference of the inner tube and the other end attached to a distal end of the outer tube. The flow blocking member is configured to expand as the outer tube moves toward a distal end of the inner tube and to collapse as the outer tube moves away from the distal end of the inner tube. In this way, expansion of the flow blocking member is able to be controlled simply by pushing/retracting the outer or inner tube to offer a fast shifting between different configurations. The flow blocking member is able to occlude blood flow with a controllably expansion to lower stimulation to the wall of the blood vessel and avoid the easy bursting of the balloon.

A catheter and tissue cutting system percutaneously permits the creation of an anastomosis between a first and second anatomical structure, such as a vein and an artery. The system comprises a catheter having a main body with a lumen and tapered distal tip, configured to be moved distally into the first anatomical structure over a primary guidewire. A cutting electrode is nested in the main body, with a lumen which tracks over a secondary guidewire, and is insertable into the secondary anatomical structure. An energy supply is operative to energize the cutting electrode in order to cut a tissue wall defining the first anatomical structure.

A medical instrument includes first and second knobs. The first knob is fitted on a handle of the medical instrument, and is movable along a longitudinal axis of the medical instrument to control a deflection of a medical device coupled to a distal end of the medical instrument relative to the longitudinal axis. The second knob is fitted on the handle of the medical instrument, and is movable along the longitudinal axis to control a shape of the medical device.

Catheters incorporating a thin film polymeric layer or layers. The thin film may have a wall thickness of about 0.00025″ +/− less than 0.0001″ to about 0.0015″ +/−0.0002″, for example. The thin film may be formed by extruding a sheet and cutting the sheet into elongate ribbons, each having two opposing long edges. The ribbon may be rolled or wrapped to define a tubular shape with a gap between the long edges. Heat and pressure may be applied to close the gap, abut the edges and form a longitudinal joint. The joint may extend along a portion of the length of the tubular shaft or most of the length of the tubular shaft. The tubular-shaped thin film layer may have a uniform wall thickness around the circumference, and the uniform wall thickness may extend across the joint.

A device for intravascular intervention can comprise an intervention element, an elongate manipulation member, and a joining element. The elongate element can comprise a hooked portion extending about a proximal portion of the intervention element. The hooked portion can comprise a bend. The hooked portion can have (i) no substantial surface crack at an interior region of the bend and (ii) a maximum lateral dimension that is less than 0.027 inch. The joining element can substantially permanently attach the hooked portion to the intervention element.

A neurovascular access catheter can comprise an elongate, flexible tubular body. The tubular body can comprise a proximal end, a distal end, and a side wall at least partially defining a central lumen. The central lumen can extend axially through the side wall. The tubular body can include a distal microcatheter segment that extends proximally from the distal end. The tubular body can include a proximal shaft that extends distally from the proximal end. The tubular body can include a tapered dilator segment being positioned in between the distal microcatheter segment and the proximal shaft segment.

An interventional device includes an elongate shaft and a transducer strip. The transducer strip includes a first edge and an opposing second edge. The first edge and the second edge are separated by a width dimension, and the first edge and the second edge each extend along a length direction of the transducer strip. The transducer strip also includes a piezoelectric transducer that extends along a transducer direction that forms an acute angle with respect to the length direction. The transducer strip is wrapped in the form of a spiral around the elongate shaft of the interventional device such that the piezoelectric transducer forms a band around the elongate shaft. The width dimension is defined such that the adjacent first and second edges of consecutive turns of the spiral abut or overlap one another.

Devices described herein include an actuated clot retrieval catheter system. The system includes a catheter having a metallic region positioned at the distal tip of the catheter. The metallic region includes at least two abutting metals in a bimetallic coil configuration. The bimetallic coil expands to form a seal with the inner wall of a vessel. In some examples, the bimetallic coil also captures a clot for removal from the vessel. The bimetallic coil is manufactured from metal-based materials having different thermal expansion coefficients. Conductive wires extend along a longitudinal axis of the catheter from an electrical current controller to at least a portion of the metallic region. Electrical current to the metallic region causes the bimetallic coil to transition from a tight configuration to an expanded configuration and remove the clot.

A low-profile access port for subcutaneous implantation within a patient. The access port can include a set of receiving cups which can be placed in fluid communication with a catheter. The set of receiving cups can provide a greater skin surface with which to access the port to avoid repeated penetrations at a single locus, such as during consecutive dialysis treatments. The access port can alternatively include needle penetrable arms or elongate chambers that also have a slim, low profile. The access port can include a needle guide to direct subsequent needle access to different insertion points to permit healing at the previous insertion points. The access port can be formed of a modular construction with a first conduit, a second conduit, and an outer shell. The outer shell can include a proximal portion and a distal portion. The access port can include a stem assembly and a locking member.