A clamp, and method, for occluding bodily vessels such as arteries and veins, is provided. The clamp comprises a flexible hollow catheter having a pair of inflatable balloons sealed to the catheter and in fluid communication with its interior. The balloons are separated by a predetermined distance along the catheter such that when the catheter is secured around a vessel, the balloons present substantially parallel, opposed and spaced occluding surfaces at substantially opposite sides of the vess...

A vascular dilating device for performing a coronary angioplasty procedure that includes a tubular barrel defining a reservoir for containing a supply of actuating fluid and having a plunger and connected piston reciprocially disposed within the reservoir. The outlet of the reservoir is connected to a valve assembly having an outlet to which a balloon catheter is connected. The valve assembly includes a control valve and a unidirectional valve which are co-operatively associated for directing fl...

The invention relates to a vascular prosthesis in the form of a flexible tube which can be implanted in animals or human beings, with a regular pattern of blind holes in the external surface of the tube, which are regular with regard to direction, transverse dimensions and depth and are produced by laser treatment. The invention also relates to a method of producing such a vascular prosthesis consisting in that the holes are produced by means of pulsated laser beams along one or more helical lin...

A woven tubular vascular prosthesis having alternating plain/twill weave and two pairs of double leno weave of texturized synthetic fiber of 64 denier/144 filament has sufficiently low porosity that preclotting is unnecessary to avoid hemorrhaging and unravelling is prevented even where the graft is cut at an oblique angle.

A purified vascular permeability protein factor and method of manufacture, wherein the factor has the following characteristics: (a) in an aqueous solution (0.01 M Na.sub.3 PO.sub.4, pH 7) whose concentration of NaCl is varied linearly, the factor is eluted from a heparin-Sepharose chromatography column in a peak centered at 0.4 M NaCl; (b) in an aqueous solution of Na.sub.3 PO.sub.4 (pH 7.0) whose concentration is varied linearly, the factor is eluted from a hydroxylapatite column in a peak cen...

A medical stent for use in an aneurysm constructed with a flexible tubular body formed from a medical thermoplastic in the form of a helix. The flexible tubular body defines a lumen and the body is adapted to assume a substantial linear configuration when mounted on a stylet with the material of the body having a recovery memory which causes it to assume a helical configuration when it is removed from the stylet. The body is provided with strands which are connected to adjacent loops of the heli...

For use in vascular surgery a roll of wound strand having an outer predetermined size diameter corresponding to the inside diameter of an opened blood conduit into which it is temporarily inserted with a pigtail of one end of the roll of strand extending from the blood conduit to be used to pull the strand from the roll until the roll is completely removed from the blood conduit after it has been stitched together.

A vascular access fistula includes a smooth, continuous PTFE tube having a hard sintered tube section integrally joined at its opposing ends with expanded PTFE tube sections. Inlet and outlet access port holes are formed in the hard sintered tube section to provide acute access to the fistula. A port collar surrounds the hard sintered tube section to facilitate the attachment of dual lumen tubing thereto. Following implantation of the access fistula, the dual lumen tubing temporarily extends thr...

A mandrel assembly supports an umbilical cord during the shaping and curing of the cord for use as a vascular graft. The mandrel assembly has a pair of mandrel members adapted to be releasably connected in end-to-end relation. Adjacent end sections of the mandrel members have reduced cross sectional shapes to provide the graft with a Venturi throat. Each mandrel member has a low friction outer surface to facilitate the insertion and withdrawal of the mandrel member from the lumen of the umbilica...

A body-attached device for dilating blood vessels. An elongated, rigid channel-shaped member receives the under side of a body extremity such as the forearm. The inside of the member carries a sleeve which is adapted to be wrapped over the top side of the arm and retained in place by Velcro tabs. The sleeve contains electric resistance heating elements and is in several sections separately wrappable around the arm. The forward end of the elongated member has a handle bar to be gripped by the use...