Patents Assigned to Micro Interventional Systems
  • Patent number: 5817057
    Abstract: The invention provides flow directed catheters and methods which are useful in introducing various fluids to a target site within a body lumen. In one exemplary embodiment, a flow directed catheter is provided which comprises a catheter body having a proximal end, a distal end and at least one axial lumen. At least one jet is in fluid communication with the axial lumen. The jet is angled toward the proximal end of the catheter body so that a fluid which is flowed through the axial lumen exits the jet to distally propel the catheter body.
    Type: Grant
    Filed: September 13, 1996
    Date of Patent: October 6, 1998
    Assignee: Micro Interventional Systems, Inc.
    Inventors: Alejandro Berenstein, Howard E. Preissman
  • Patent number: 5776099
    Abstract: A balloon catheter has a combined balloon inflation and guide wire lumen. A guide wire tube in a distal port of the lumen inhibits loss of inflation medium through the port even when the balloon is inflated at relatively high pressures. The guide wire tube provides sufficient clearance with the guide wire, however, so that the catheter may be axially translated over the guide wire without excessive friction.
    Type: Grant
    Filed: March 10, 1997
    Date of Patent: July 7, 1998
    Assignee: Micro Interventional Systems
    Inventor: William S. Tremulis
  • Patent number: 5759173
    Abstract: A balloon catheter (2) comprises an outer sheath (3) housing an inner catheter (10). The inner catheter comprises an inner tubular member (30), a braided reinforcement layer (32), and a soft outer layer (34). The inner tubular member extends from a proximal end (15) of the inner catheter to a first distal location (22). The braided reinforcement layer extends from the proximal end to a second distal location (18), usually located proximal of the first distal location. The soft outer layer extends from the proximal end of the inner catheter to the tip (44) of the inner catheter. In this way, a catheter having a shaft region (16), a transition region (20), and a distal region (24), each with different strength and flexibility characteristics, can be used with the outer sheath. The balloon (8) is bonded to the distal ends of the outer sheath and the inner catheter and is inflated through the space defined therebetween.
    Type: Grant
    Filed: July 3, 1996
    Date of Patent: June 2, 1998
    Assignee: Micro Interventional Systems
    Inventors: Howard E. Preissman, Richard S. Jaraczewski, Erin McGurk
  • Patent number: 5690671
    Abstract: An embolic element comprises a filament composed of a shape memory material having an unexpanded coil configuration and an expanded random matrix configuration. The embolic element may be delivered to a blood vessel treatment site in its coiled configuration over a delivery wire through a guide catheter. Usually, the coiled embolic element will be disposed over a helical section of the delivery wire prior to release. In that way, proper positioning of the embolic element may be confirmed prior to release. The embolic element is then expanded to its enlarged configuration by heating or otherwise exposing to a temperature over the transition temperature of the shape memory material.
    Type: Grant
    Filed: December 13, 1994
    Date of Patent: November 25, 1997
    Assignee: Micro Interventional Systems, Inc.
    Inventors: Erin McGurk, Ronald Dieck, William S. Tremulis