Rotate to advance catheterization system
AssigneeSpirus Medical, Inc.
InventorJames 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 genitourinary and gastrointestinal passages and organs.
Claims20
A threaded catheter for catheterizing mammalian urinary passages, said catheter comprising a flexible catheter tube having a lumen extending from a drainage port at the distal end to the proximal end, said distal end of said tube configured with an external screw thread of uniform pitch, said thread having a thread height of at least one fifth (⅕) of the outside diameter of said catheter tube and a thread pitch not greater than the circumference of the helix formed by said thread, said tube having sufficient torsional strength to transmit rotational force applied at said proximal end of said tube to said thread.
A threaded dilator for dilating mammalian genitourinary and gastrointestinal passages, said dilator comprising a flexible shaft incorporating a tapered bulb near it's distal end with a helical thread of uniform pitch disposed thereon, said thread having a thread height of at least one fifth (⅕) of the outside diameter of said shaft and a thread pitch not greater than the circumference of the helix formed by said thread.
A threaded occluder for occluding mammalian genitourinary passages, said occluder comprising a flexible shaft incorporating a tapered bulb near it's distal end with a first helical thread of uniform pitch disposed distally of the midsection of said bulb and a second helical thread of uniform pitch disposed proximally of said midsection of said bulb.
A threaded stent for supporting mammalian genitourinary and gastrointestinal passages, said stent comprising a flexible tube with an external helical thread disposed thereon, 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 the helix formed by said thread.
A threaded intraurethral valved catheter comprising a flexible tube with an external helical thread disposed thereon, 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 the helix formed by said thread.
A threaded suprapubic catheter for drainage of a genitourinary organ, said catheter comprising a flexible catheter tube having a first axial port at it's distal end and a second axial port at it's proximal end and a lumen communicating there between, said distal end of said tube configured with an external screw thread of uniform pitch, said thread having a thread height of at least one half (½) of the outside diameter of said catheter tube and a thread pitch not greater than the circumference of the helix formed by said thread.
A threaded camera introducer system for accessing the gastrointestinal tract, comprising a flexible catheter tube with a lumen extending from the distal end of said tube to the proximal end of said tube, and further comprising an external thread disposed over said distal end of said tube, 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 the helix formed by said thread.
Dependencies are inferred from the claim text.