Rotate advance catheterization system
AssigneeEssex Technology, Inc.
InventorJames J. Frassica
Life of this patent
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Abstract
A system of rotate-to-advance medical devices including catheters, dilators, occluders, stents, suprapubic catheters and camera introducers configured with external screw threads and depending substantially on rotation for means of advancement and emplacement in mammalian genitouinary and gastrointestinal passages and organs.
Claims6
A threaded stent for supporting mammalian genitourinary and gastrointestinal passages, said stent comprising a flexible tube with an external helical thread disposed thereon for causing a gentle, gradual displacement of the mammalian genitourinary and gastrointestinal passages without incising or rupturing the same, said tube further comprising means for axial engagement in a non-rotational relationship with the distal end of a stylet, said thread having a thread height of at least one fifth (⅕) of the outside diameter of said tube and a thread pitch not greater than the circumference of an imaginary circle enscribing the outer boundary of said thread.
A method for supporting mammalian genitourinary and gastrointestinal passages, said method comprising:
- providing a threaded stent for supporting mammalian genitourinary and gastrointestinal passages, said stent comprising a flexible tube with an external helical thread disposed thereon for causing a gentle, gradual displacement of the mammalian genitourinary and gastrointestinal passages without incising or rupturing the same, said tube further comprising means for axial engagement in a non-rotational relationship with the distal end of a stylet, said thread having a thread height of at least one fifth (⅕) of the outside diameter of said tube and a thread pitch not greater than the the circumference of an imaginary circle enscribing the outer boundary of said thread;
- and
- advancing said threaded stent to a desired portion of one of said mammalian genitourinary and gastrointestinal passages, said advancing being conducted by turning said stent.
Dependencies are inferred from the claim text.