Patents by Inventor David F. Profitt

David F. Profitt has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Patent number: 4790310
    Abstract: An improved laser catheter system includes a flexible catheter tube having proximate and distal ends. The distal end, which is intended for inserting into a patient's artery, is axially split into at least two segments. Optical waveguides extend the length of the catheter tube and terminate at the distal end, with at least one waveguide secured to each of the spreadable segments. A mechanism is provided for spreading the segments while the catheter is implaced in the patient. Conveniently, a balloon catheter may be used by inserting it into the lumen of the laser catheter so that the balloon tip lies within the spreadable segments. By then inflating the balloon, the spreadable segments are spread apart as desired.
    Type: Grant
    Filed: February 4, 1987
    Date of Patent: December 13, 1988
    Inventors: Robert Ginsburg, David F. Profitt
  • Patent number: 4769005
    Abstract: A guiding sheath for inserting guidewires or vascular catheters within a blood vessel includes an elongate body having plurality of axial lumens. At least some of the lumens project laterally from the body at preselected angles so that, when inserted therethrough, the guidewire or catheter will exit at said preselected angle to facilitate directing the guidewire or catheter to the proper location within the vascular system. Usually, the insertional sheath will include a primary axial lumen which is used for inserting the sheath on a guidewire to a location where a branching in the vascular system occurs. The sheath is then positioned under fluoroscopic guidance so that one of the lumens is then properly located to direct the guidewire or catheter in the desired direction.
    Type: Grant
    Filed: August 6, 1987
    Date of Patent: September 6, 1988
    Inventors: Robert Ginsburg, David F. Profitt
  • Patent number: 4754752
    Abstract: An improved balloon-tipped catheter includes means for convectively heating the inflation medium within the balloon during dilation. In the preferred embodiment, the convective heat is provided by a radiant heating block which is attached to a laser light source through an optical waveguide extending the length of the catheter. The convectively heated balloon promotes restoration and healing of the arterial wall in the region of stenosis, which region normally suffers from cracking, tearing, and stretching. It has been found that damage to the arterial wall can sometimes result in abrupt closure of the artery and frequent restenosis in the same region.
    Type: Grant
    Filed: July 27, 1987
    Date of Patent: July 5, 1988
    Inventors: Robert Ginsburg, David F. Profitt