Catheter system
First Claim
1. A medical device for opening strictures in mammalian gastrointestinal and genitourinary passages, comprising a tube with an external helical thread disposed thereon, said thread having a thread height of at least one fifth (1/5) of the outside diameter of said tube and a thread pitch not greater than the circumference of the helix formed by said thread.
2 Assignments
0 Petitions
Accused Products
Abstract
Apparatus and methods using rotational advancement and emplacement of various devices for catheterization, dilation and occlusion of mammalian genito-urinary and gastro-intestinal passages and organs, where devices and assemblies have an external helical element present near the distal end which provides a longitudinal pull on the wall of the passage when rotational force is applied to the proximal end of the device.
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Citations
12 Claims
- 1. A medical device for opening strictures in mammalian gastrointestinal and genitourinary passages, comprising a tube with an external helical thread disposed thereon, said thread having a thread height of at least one fifth (1/5) of the outside diameter of said tube and a thread pitch not greater than the circumference of the helix formed by said thread.
- 9. A system for implanting a medical device for opening strictures in mammalian gastrointestinal and genitourinary passages, comprising a device follower and a medical device, said device follower comprising an elongate member with an external helical thread disposed thereon, said thread having a thread height of at least one fifth (1/5) of the outside diameter of said member and a thread pitch not greater than the circumference of the helix formed by said thread, said medical device comprising a tube with an external helical thread disposed thereon, said thread having a thread height of at least one fifth (1/5) of the outside diameter of said tube and a thread pitch not greater than the circumference of the helix formed by said thread, one end of said tube configured for self-centering alignment with the proximal end of said device follower.
Specification