US2019142539A1PendingUtilityA1

Magnetic system to prevent migration of intra-luminal medical stent and method thereof

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Assignee: UNIV VIRGINIA PATENT FOUNDATIONPriority: May 4, 2016Filed: May 3, 2017Published: May 16, 2019
Est. expiryMay 4, 2036(~9.8 yrs left)· nominal 20-yr term from priority
Inventors:Robert G. SawyerGorav Ailawadi
A61L 2300/44B60W 2556/45A61B 17/50A61L 31/022A61B 17/52B60W 2554/00A61M 25/00A61F 2210/009A61F 2220/0008A61F 2002/043A61F 2002/046A61F 2002/045A61F 2/848B60W 2720/403B60W 10/02A61F 2/82B60W 2710/021B60W 50/0097A61F 2002/044A61B 34/73B60W 30/18172
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Claims

Abstract

Systems and methods for fixing a stent in position in an anatomical lumen. Such systems and methods include an intra-luminal stent and a magnet, implanted, for example, in the subcutaneous layer of the subject. The stent and the magnet are magnetically coupled such that the magnetic forces fix the stent in position. Use of the invention permits fixation of an intra-luminal stent to avoid stent migration while minimizing tissue damage.

Claims

exact text as granted — not AI-modified
We claim: 
     
         1 . A medical system for fixing a stent in position within an anatomical lumen of a subject, the medical system comprising:
 an intra-luminal stent;   a magnet wherein said magnet is configured to be implanted in the subject in one or more of the following locations:
 the subcutaneous layer of the subject, 
 the intra-muscular layer of the subject, or 
 the sub-fascial layer of the subject; and 
   wherein a magnetic force between said intra-luminal stent and said magnet is configured to fix said stent in position.   
     
     
         2 . The medical system of  claim 1 , wherein said stent is composed of a material selected from the group consisting of a magnet, a magnetizable material, and a magnetic metal. 
     
     
         3 . The medical system of  claim 1 , wherein said magnet is composed of a material selected from the group consisting of a magnet, a magnetizable material, and a magnetic metal. 
     
     
         4 . The medical system of  claim 1 , wherein said stent is expandable. 
     
     
         5 . The medical system of  claim 1 , wherein said stent is designed to be flexible to follow the contours of said anatomical lumen. 
     
     
         6 . The medical system of  claim 1 , wherein said stent is located in the respiratory tract. 
     
     
         7 . The medical system of  claim 1 , wherein said stent is located in the gastrointestinal tract. 
     
     
         8 . The medical system of  claim 1 , wherein said stent is inserted endoscopically. 
     
     
         9 . The medical system of  claim 1 , wherein said stent is configured to be advanced by peristaltic contractions. 
     
     
         10 . The medical system of  claim 1 , wherein said stent is removed through open surgery. 
     
     
         11 . The medical system of  claim 1 , wherein said stent is removed endoscopically. 
     
     
         12 . The medical system of  claim 1 , wherein said stent is removed by advancing through the lumen naturally. 
     
     
         13 . The medical system of  claim 12 , wherein said stent is configured to be advanced by peristaltic contractions. 
     
     
         14 . The medical system of  claim 1 , wherein multiple of said magnets are used to fix said stent in position. 
     
     
         15 . The medical system of  claim 1 , wherein said magnetic force is adjusted by the size, strength, and location of said magnet. 
     
     
         16 . A method for fixing a medical stent in position of a subject, said method comprising:
 inserting a stent in an anatomical lumen;   implanting a magnet in the subject in one or more of the following locations:
 the subcutaneous layer of the subject, 
 the intra-muscular layer of the subject, or 
 the sub-fascial layer of the subject; and 
   employing a magnetic force between said stent and said magnet to fix said stent in position.   
     
     
         17 . The method of  claim 16 , wherein said stent is composed of a material selected from the group consisting of a magnet, a magnetizable material, and a magnetic metal. 
     
     
         18 . The method of  claim 16 , wherein said magnet is composed of a material selected from the group consisting of a magnet, a magnetizable material, and a magnetic metal. 
     
     
         19 . The method of  claim 16 , wherein said stent is expandable. 
     
     
         20 . The method of  claim 16 , wherein said stent is designed to be flexible to follow the contours of said anatomical lumen. 
     
     
         21 . The method of  claim 16 , wherein said stent is located in the respiratory tract. 
     
     
         22 . The method of  claim 16 , wherein said stent is located in the gastrointestinal tract. 
     
     
         23 . The method of  claim 16 , wherein said stent is inserted endoscopically. 
     
     
         24 . The medical system of  claim 16 , wherein said stent is configured to be advanced by peristaltic contractions. 
     
     
         25 . The method of  claim 16 , wherein said stent is removed by advancing through the lumen naturally. 
     
     
         26 . The method of  claim 25 , wherein said stent is configured to be advanced by peristaltic contractions. 
     
     
         27 . The method of  claim 16 , wherein said stent is removed through open surgery. 
     
     
         28 . The method of  claim 16 , wherein said stent is removed endoscopically. 
     
     
         29 . The method of  claim 16 , wherein multiple of said magnets are used to fix said stent in position. 
     
     
         30 . The method of  claim 16 , wherein said magnetic force is adjusted by the size, strength, and location of said magnet. 
     
     
         31 . A medical system for fixing a stent in position within an anatomical lumen of a subject, the medical system comprising:
 an intra-luminal stent;   a magnet wherein said magnet is configured to be disposed on the subject disposed on a cutaneous location; and   wherein a magnetic force between said intra-luminal stent and said magnet is configured to fix said stent in position.   
     
     
         32 . The medical system of  claim 31 , wherein said stent is composed of a material selected from the group consisting of a magnet, a magnetizable material, and a magnetic metal. 
     
     
         33 . The medical system of  claim 31 , wherein said magnet is composed of a material selected from the group consisting of a magnet, a magnetizable material, and a magnetic metal. 
     
     
         34 . The medical system of  claim 31 , wherein said stent is expandable. 
     
     
         35 . The medical system of  claim 31 , wherein said stent is designed to be flexible to follow the contours of said anatomical lumen. 
     
     
         36 . The medical system of  claim 31 , wherein said stent is located in the respiratory tract. 
     
     
         37 . The medical system of  claim 31 , wherein said stent is located in the gastrointestinal tract. 
     
     
         38 . The medical system of  claim 31 , wherein said stent is inserted endoscopically. 
     
     
         39 . The medical system of  claim 31 , wherein said stent is configured to be advanced by peristaltic contractions. 
     
     
         40 . The medical system of  claim 31 , wherein said stent is removed through open surgery. 
     
     
         41 . The medical system of  claim 31 , wherein said stent is removed endoscopically. 
     
     
         42 . The method of  claim 31 , wherein said stent is removed by advancing through the lumen naturally. 
     
     
         43 . The method of  claim 42 , wherein said stent is configured to be advanced by peristaltic contractions. 
     
     
         44 . The medical system of  claim 31 , wherein multiple of said magnets are used to fix said stent in position. 
     
     
         45 . The medical system of  claim 31 , wherein said magnetic force is adjusted by the size, strength, and location of said magnet. 
     
     
         46 . A method for fixing a medical stent in position of a subject, said method comprising:
 inserting a stent in an anatomical lumen;   configuring a magnet on the subject disposed on a cutaneous location; and   employing a magnetic force between said stent and said magnet to fix said stent in position.   
     
     
         47 . The method of  claim 46 , wherein said stent is composed of a material selected from the group consisting of a magnet, a magnetizable material, and a magnetic metal. 
     
     
         48 . The method of  claim 46 , wherein said magnet is composed of a material selected from the group consisting of a magnet, a magnetizable material, and a magnetic metal. 
     
     
         49 . The method of  claim 46 , wherein said stent is expandable. 
     
     
         50 . The medical system of  claim 46 , wherein said stent is designed to be flexible to follow the contours of said anatomical lumen. 
     
     
         51 . The method of  claim 46 , wherein said stent is located in the respiratory tract. 
     
     
         52 . The method of  claim 46 , wherein said stent is located in the gastrointestinal tract. 
     
     
         53 . The method of  claim 46 , wherein said stent is inserted endoscopically. 
     
     
         54 . The method of  claim 46 , wherein said stent is configured to be advanced by peristaltic contractions. 
     
     
         55 . The method of  claim 46 , wherein said stent is removed through open surgery. 
     
     
         56 . The method of  claim 46 , wherein said stent is removed endoscopically. 
     
     
         57 . The method of  claim 46 , wherein said stent is removed by advancing through the lumen naturally. 
     
     
         58 . The method of  claim 57 , wherein said stent is removed by advancing through the gastrointestinal tract through peristaltic contractions. 
     
     
         59 . The method of  claim 46 , wherein multiple of said magnets are used to fix said stent in position. 
     
     
         60 . The method of  claim 46 , wherein said magnetic force is adjusted by the size, strength, and location of said magnet. 
     
     
         61 . A medical system for fixing a stent in position within a first anatomical lumen of a subject, the medical system comprising:
 an intra-luminal stent, said intra-luminal stent configured to be disposed in the first anatomical lumen;   a magnet wherein said magnet is configured to be disposed in a second anatomical lumen or remote location of the first anatomical lumen; and   wherein a magnetic force between said intra-luminal stent and said magnet is configured to fix said stent in position with the first anatomical lumen of a subject.   
     
     
         62 . The medical system of  claim 61 , wherein said stent is composed of a material selected from the group consisting of a magnet, a magnetizable material, and a magnetic metal. 
     
     
         63 . The medical system of  claim 61 , wherein said magnet is composed of a material selected from the group consisting of a magnet, a magnetizable material, and a magnetic metal. 
     
     
         64 . The medical system of  claim 61 , wherein said stent and/or said magnet is expandable. 
     
     
         65 . The medical system of  claim 61 , wherein said stent is designed to be flexible to follow the contours of said anatomical lumen. 
     
     
         66 . The medical system of  claim 61 , wherein said stent and/or said magnet is inserted endoscopically. 
     
     
         67 . The medical system of  claim 61 , wherein said stent and/or said magnet is removed endoscopically. 
     
     
         68 . The medical system of  claim 61 , wherein multiple of said magnets are used to fix said stent in position. 
     
     
         69 . The medical system of  claim 61 , wherein said magnetic force is adjusted by the size, strength, and location of said magnet. 
     
     
         70 . A method for fixing a medical stent in position within a first anatomical lumen of a subject, the method comprising:
 disposing a stent in said first anatomical lumen;   disposing a magnet in a second anatomical lumen or a remote location of said first anatomical lumen; and   wherein a magnetic force between said intra-luminal stent and said magnet is configured to fix said stent in position within said first anatomical lumen of said subject.   
     
     
         71 . The method of  claim 70 , wherein said stent is composed of a material selected from the group consisting of a magnet, a magnetizable material, and a magnetic metal. 
     
     
         72 . The method of  claim 70 , wherein said magnet is composed of a material selected from the group consisting of a magnet, a magnetizable material, and a magnetic metal. 
     
     
         73 . The method of  claim 70 , wherein said stent and/or said magnet is expandable. 
     
     
         74 . The method of  claim 70 , wherein said stent is designed to be flexible to follow the contours of said anatomical lumen. 
     
     
         75 . The method of  claim 70 , wherein said stent and/or said magnet is inserted endoscopically. 
     
     
         76 . The method of  claim 70 , wherein said stent is removed endoscopically. 
     
     
         77 . The method of  claim 70 , wherein multiple of said magnets are used to fix said stent in position. 
     
     
         78 . The method of  claim 70 , wherein said magnetic force is adjusted by the size, strength, and location of said magnet.

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