Surgery – Body inserted urinary or colonic incontinent device or...
Reexamination Certificate
1999-04-05
2001-06-19
O'Connor, Cary (Department: 3736)
Surgery
Body inserted urinary or colonic incontinent device or...
Reexamination Certificate
active
06248058
ABSTRACT:
This invention pertains to the treatment of tracheo-esophageal fistulas and, more particularly, to the treatment of tracheo-esophageal fistulas by means of stenting the wall of the esophagus.
Tracheo-esophageal fistulas are a serious, end stage complication of cancers arising in the lung, tracheo-bronchial tree and the esophagus. The nature and extent of the disease almost always precludes curative therapy and, therefore, palliative measures are the goals of therapy. Unfortunately, many reported successful procedures fail to improve the patients' conditions to the point that the patient is able to be released from the hospital. The “in-hospital” mortality is often higher than the 30-day mortality.
Increases in the expertise of endoscopists and esophagoscopy have permitted esophageal endoprostheses to be utilized in the treatment of tracheo-esophageal fistulas. Such procedures include stenting or other intubation of the esophagus. Unfortunately, the funnel rim of conventional stents used in this regard is often a poor fit with gaps between the rim and the mucosa of the esophageal wall. As a result, food and saliva are often allowed to pass between the mucosa and the outer surface of the prosthesis, thereby deleating the purpose of the prosthesis. In light of the foregoing, there is a need for a new and improved procedure for treating tracheo-esophageal fistulas which overcomes the disadvantages of the currently provided procedures.
In general, it is an object of the present invention to provide a minimally invasive method for treating tracheo-esophageal fistulas.
Another object of the invention is to provide a method of the above character in which a material is injected into the wall of the esophagus to form one or more implants in the wall for facilitating support of a stent in the esophagus and formation of a seal between the esophageal wall and the stent.
Another object of the invention is to provide a method of the above character in which the injected material is a nonbiodegradable material.
Another object of the invention is to provide a method of the above character in which the material is injected as at least one solution and thereafter forms a solid.
Another object of the invention is to provide a method of the above character in which the at least one solution includes a solution from which a nonbiodegradable solid precipitates.
Another object of the invention is to provide a method of the above character in which the solution includes a biocompatible polymer and a biocompatible solvent.
Another object of the invention is to provide a method of the above character in which a first plurality of implants is formed in the wall above the fistula and a second plurality of implants is formed in the wall below the fistula.
Another object of the invention is to provide a method of the above character in which a stent is placed in the esophagus to isolate the fistula.
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Silverman David E.
Stein Alan
Enteric Medical Technologies, Inc.
Flehr Hohbach Test Albritton & Herbert LLP
O'Connor Cary
Szmal Brian
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