Abstract:
One aspect of the invention provides a sheath including: a cylinder defining a central passage; a balloon located along an external surface of a distal end of the cylinder, the balloon lying substantially flush with or recessed from the external surface when deflated, but capable of projecting beyond the external surface when inflated; and an inflation port located at a proximal end of the cylinder, the inflation port in fluid communication with the balloon. Another aspect of the invention provides a kit including: a sheath as described herein and instructions for use.
Abstract:
A catheter is provided, such as for distal neurovascular access or aspiration. The catheter includes an elongate flexible body, having a proximal end, a distal end and a side wall defining a central lumen. A distal zone of the side wall includes a tubular inner liner, a tie layer separated from the lumen by the inner liner, a helical coil surrounding the tie layer, adjacent windings of the coil spaced progressively further apart in the distal direction. An outer jacket surrounds the helical coil. The outer jacket is formed from a plurality of tubular segments positioned end to end, coaxially about the coil. The flexural load profile of the catheter as a function of catheter length is configured to provide enhanced distal flexibility while maintaining high backup support.
Abstract:
A catheter has an expansile tip 901 that can be delivered in a constricted form. The increased tip diameter facilitates the aspiration and removal of large clot volumes by increasing the area of the catheter tip that applies aspiration to the clot. The tip 901 comprises a support frame which can be cut from a metal or polymer tube, covered with a thin polymer sleeve 909 containing highly elastic properties. This construction provides good pushability and high compressive resistance. The cut pattern can contain axial connections of the support frame 908 and ring members 906, which will provide a large level of axial support, lateral flexibility and hoop strength to withstand aspiration. The tip of the device can contain a section 907 proximal of the highly flexible area 905 that can expand to except clot. This potential to increase body diameter facilitates the retrieval of large volume clots while the construction of the catheter provides good column stiffness to avoid axial collapse and still maintain good flexibility.
Abstract:
An aspiration system includes an aspiration catheter including a tubular aspiration member having a proximal end, a distal end, and a lumen, and configured to at least partially extend out of the lumen of an elongate tubular member and into the vasculature of a subject, an elongate support member coupled to the tubular aspiration member and extending between the proximal end of the aspiration catheter and the proximal end of the tubular aspiration member, a high pressure injection lumen extending within the elongate support member and having a distal end including a curved portion configured to change a direction of fluid flow by at least about 90, at least one orifice located at the distal end of the high pressure injection lumen configured to allow liquid to be released into the lumen of the tubular aspiration member, and an annular seal carried by the tubular aspiration member and configured to create a liquid seal against the inner surface of the elongate tubular member.
Abstract:
Methods for collapsing a tubular organ, such as the esophagus, involve inserting a device into the tubular organ, at least partially sealing off a section of the tubular organ, and drawing in the wall of the tubular organ by application of suction. The devices may be used to move the wall of the tubular organ away from an area undergoing treatment or therapy, such as to minimize damage to the tubular organ by application of radiofrequency energy or to limit temperature increase of the tubular organ.
Abstract:
An inflatable blood perfusion and filter balloon for preventing ischaemia is provided. The balloon comprises: a distinctly shaped inflatable chamber with a plurality of wall portions that form a plurality of lumens when inflated, and the lumens cooperatively defining a plurality of outwardly open channels each extending externally lengthwise between the two ends of the inflated balloon for passage of blood, the lumens are formed integrally between the wall portions of the inflated balloon, and the lumens being fitted with a filter which blocks the debris from moving towards the distal vascular bed.
Abstract:
An occlusion apparatus comprises inner and outer sheaths and an expandable flexible tubular sleeve. The occlusion apparatus is advanced to a target site in the blood vessel. A dilator having a soft, compressible tip may be advanced through a lumen of the inner sheath to facilitate the advancement of the occlusion apparatus. The sheaths are translated relative to one another to expand the flexible tubular sleeve to a funnel shape with a distal flush portion contacting the blood vessel inner wall and a proximal tapered portion. The proximal portion is fluid permeable so that blood can pass through to apply pressure on the vessel wall through the distal portion. A capture or traction device can be advanced out of the inner sheath lumen and retracted back therein to capture thrombus. The distal portion of the device may comprise an expandable mesh braid with a memory characteristic to limit expansion.
Abstract:
Some embodiments of devices and methods described herein may, among other uses, favorably cause the activation and/or deactivation vascular baroreceptors in order to achieve a desired impact on physiological condition, including but not limited to baroreflex-regulated conditions, hypertension, hypotension, nervous system disorders, metabolic disorders, cardiovascular disease, heart failure, cardiac arrhythmia, renal disease, respiratory disease, diabetes, and insulin resistance. The devices and methods may be used in concert with each other and/or other treatments, medications, interventions, or behavioral regimens, and they may also be used in concert with devices and methods that perform or assist with any combination of the following: assessing or measuring a mammal's blood pressure; assessing, measuring, or predicting the impact of the described methods and devices on the patient's condition (including blood pressure); and/or protecting the surrounding anatomy from adverse effects.
Abstract:
A mechanical thrombectomy device system is disclosed that is made from a single piece of biocompatible material, including a proximal flow block portion/feature, and/or, a flow block feature in the device body portion, a guidewire like delivery portion and an expandable, treatment portion. The construction of the device from a single piece allows for a seamless transition from the delivery portion to the treatment portion, thus removing any joints or bonding of the two portions together as separate pieces. This improves the strength of the system as a whole and greatly reduces the possibility of the two parts unintentionally detaching from each other. Likewise, the distal treatment portion is cut from a piece of material the same size as the proximal delivery portion, allowing the device to be compacted to a similar size profile giving it delivery advantages including a lower delivery force required and requiring small access systems, and the treatment portion's surface can be altered to enhance embolus affinity by either coating with a substance or changing the texture by mechanical or chemical means.
Abstract:
The disclosure relates to a vascular device (VOD). More specifically, the disclosure relates to vascular occluding devices having distensible sheath capable of obtaining a prolate spheroid shape having a variable polar axis, with an integral performing tip, capable of effectively temporarily and reversibly occluding fluid flow in body vessels of varying diameters and shapes.