{
  "patent_number": "US 4733665",
  "country": "US",
  "title": "How Doctors Implant a Permanent Stent Using a Balloon",
  "original_title": "Expandable intraluminal graft, and method and apparatus for implanting an expandable intraluminal graft",
  "summary": "This patent describes the method for placing a permanent, expandable wire mesh tube inside a blood vessel or other body tube using a balloon-tipped catheter to widen it and keep it open.",
  "what_it_does": "This patent describes a method for implanting a medical device, called a prosthesis or intraluminal graft, inside a body passageway like a blood vessel. First, the prosthesis is placed onto a catheter (Claim 1). The catheter and prosthesis are then inserted into the body passageway (Claim 1). Once at the desired location, a part of the catheter, specifically an inflatable balloon (Claim 3), is expanded. This expansion forces the prosthesis outward, permanently deforming it beyond its elastic limit (Claim 1) to contact the walls of the passageway. The prosthesis, often a wire mesh tube made of tantalum (Claims 4, 5), then remains in place to prevent the passageway from collapsing (Claim 7). After expansion, the balloon is deflated, and the catheter is removed (Claim 2). For example, this method can be used to open a narrowed artery and keep it wide.",
  "what_it_does_not_cover": [
    "Grafts that expand on their own without needing a balloon or other external force from the catheter.",
    "Grafts that are not permanently deformed when expanded, meaning they would spring back to their original size.",
    "Methods where the graft is expanded by a mechanism other than an inflatable portion of the catheter.",
    "Grafts that are not delivered upon a catheter but are instead injected or deployed differently.",
    "Grafts that are not tubular or made of intersecting elongate members, as described in Claim 13."
  ],
  "filed": "1985-11-07",
  "granted": "1988-03-29",
  "expires": "2005-11-07",
  "status": "expired",
  "holder": "Expandable Grafts Partnership",
  "holder_url": "https://patentbrief.org/company/expandable-grafts-partnership",
  "inventors": [
    {
      "name": "Julio C. Palmaz",
      "url": "https://patentbrief.org/inventor/julio-c-palmaz"
    }
  ],
  "times_cited": 2425,
  "tags": [
    "medical_devices",
    "cardiovascular",
    "biotech"
  ],
  "abstract": "An expandable intraluminal vascular graft is expanded within a blood vessel by an angioplasty balloon associated with a catheter to dilate and expand the lumen of a blood vessel. The graft may be a wire mesh tube.",
  "url": "https://patentbrief.org/patent/us/4733665/palmaz-balloon-expandable-stent",
  "markdown_url": "https://patentbrief.org/patent/us/4733665/palmaz-balloon-expandable-stent/md",
  "google_patents_url": "https://patents.google.com/patent/US4733665",
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}