365results about How to "Prevent kinking" patented technology

A flow directed microcatheter is formed having a gradually changing flexibility and diameter between a proximal end and a distal end of the microcatheter. The changing properties of the microcatheter according to the present invention provide the flexibility of the distal tip needed to allow the microcatheter to be directed by the flow of blood within the vasculature, and the columnar strength and torquability at the proximal end and along the length of the microcatheter needed to advance and direct the distal tip to the target site. A proximal segment of the microcatheter includes a plurality of strands which vary in diameter to change the flexibility of the microcatheter. A distal segment of the microcatheter includes an inner layer which is compatible with solvents, such as DMSO, and an outer layer which provides strength and flexibility. The proximal segment and the distal segment of the microcatheter are joined by a kink resistant fuse joint.

A system for removing an obstruction from a blood vessel includes an obstruction engaging element and an expandable capture element. The capture element preferably has a flexible cover and an expandable support structure. The engaging element engages the obstruction and moves the obstruction into the capture element. The capture element protects the obstruction when the obstruction is moved into the catheter.

A stent and method of its use, the stent in its expanded configuration, exhibiting varying outward radial force along its length. In use, the expanded stent is of a tapered configuration which provides greater force in vessel regions requiring greater force and less force in regions requiring less. In particular the stent is useful in the ostium regions and at areas of bifurcation in vessels. Varying force over the length of the stent is achieved by varying the number of elements, the density of elements, the thickness of the elements making up the stent body, and maintaining a substantially metal to artery ratio in the expanded stent over its length.

Improved hand assemblies and methods combining a number of the separate known devices used in transseptal catheterization procedures, including sheaths, dilators, and needle assemblies (including a puncture device and a stylet, for example). The hand assemblies provide cooperating members that reduce the overall complexity and increase safety of transseptal catheterization procedures.

A suction device (11) for a hammer drill (6) has a first end (12) with a securing device (14) for securing the suction device (11) to the hammer drill (6) and a second end (13) opposite first end (12) and which has a contact area (15) with which the suction device (11) contacts a constructional component, the suction device (11) further having a receiving space (20) which at least partially encloses a working tool (7) of the pick power tool (6), and being provided with a connection device (18) for a vacuum source. A retaining element (21) having a through-opening (22) for the working tool (7) and a plurality of suction openings (23) is provided in an area (19) of the second end (13).

The present disclosure generally relates to improved water closet flanges and methods for installing such water closet flanges. In one exemplary embodiment, an improved water closet flange apparatus includes an outer flange and a flexible conduit portion (i.e. sleeve) extending downwardly therefrom. The flexible sleeve has a sufficient degree of flexibility to accommodate connection between offset, misaligned, angled, or otherwise incongruous plumbing fixture discharges and waste drain pipe outlets. In one embodiment, the flexible sleeve includes at least one corrugated portion to aid the desired flexibility. An upper portion of the flexible sleeve may include an inwardly extending lip portion to accommodate the desired seal between the plumbing fixture discharge and the flange apparatus. Related methods for installing the disclosed flange apparatus between plumbing fixture discharges and waste drainpipes are also described.

The invention relates to a device for guiding surgical sewing material to a needle, having a shaft on whose distal end the needle can be secured and whose proximal end is configured as a gripping portion equipped with an open guide channel for the sewing material that is to be guided. To create a device that is of simple construction and ensures reliable transport of the sewing material to the needle, the invention proposes that the guide channel can be locked mechanically, at least in sections.

Methods and apparatus are disclosed for inserting flexible, multi-lumen catheters into blood vessels, and in particular, for inserting flexible, split-tip catheters into blood vessels. The invention accomplishes these objects by temporarily stiffening each catheter lumen and tip independently through use of intra-catheter stiffener elements disposed within the catheter lumens. This provides means for advancing the catheter / stiffeners assembly through a subcutaneous tunnel, and over a plurality of guidewires until a distal tip of the catheter is at a desired position within the vessel. The intra-catheter stiffener elements are sufficiently stiffening to allow advancing the catheter over guidewires, but sufficiently flexible to allow bending and looping of the catheter for proper placement within the vessel.