US5873882A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Catheter for detaching abnormal deposits from blood vessels in humans
Assignee: Straub Medical AG
•
Filing: 1996-03-07
•
Granted: 1999-02-23
•
Expires: 2016-03-07
Abstract
Abstract The catheter connected to a drive unit has, at its front end a cutting tool which consists of a stator and rotor. Cutting edges arranged on the circumference of the rotor and stator interact in a shearing action. The rotor is an external rotor. The detached deposits are conveyed through a tubular sheath and into a collecting container via a discharge chamber. A rotary catheter of this kind is used for carefully removing blood clots and stenoses from narrowed blood vessels such as arteries and veins.
Inventors
- 👤 Immanuel Straub
- 👤 Helmuth Mohr
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 13:43
CPC Classifications
A; A61; A61B; A61B17/00; A61B17/32; A61B17/3205; A61B17/3207; A61B17/320783; A61B2017/00681; A61B2017/00685; A61B17/22; A61B2017/22038
Claims Analysis
Total Claims: 21
Claim 1
Independent Claim
146 words
A catheter for detaching abnormal deposits from blood vessels in humans comprising: a cutting tool comprising a stator and a rotor, said rotor surrounding a portion of said stator, said rotor and said stator configured to allow relative rotational motion between said rotor and said stator, said rotor including a rotor cutting edge arranged in a circumferential surface of said rotor, said stator including a stator cutting edge arranged in a circumferential surface of said stator, wherein said stator cutting edge is configured to oppose said rotor cutting edge so as to produce a shearing action between said stator cutting edge and said rotor cutting edge when said rotor is rotated relative to said stator; a rotary drive mechanism configured to rotate said rotor; and a tubular sheath communicating with said cutting tool, said sheath defining a discharge path for deposits detached by said cutting tool.
Claim 2
Dependent Claim
146 words
A catheter for detaching abnormal deposits from blood vessels in humans comprising: a cutting tool comprising a stator and a rotor, said rotor surrounding a portion of said stator, said rotor and said stator configured to allow relative rotational motion between said rotor and said stator, said rotor including a rotor cutting edge arranged in a circumferential surface of said rotor, said stator including a stator cutting edge arranged in a circumferential surface of said stator, wherein said stator cutting edge is configured to oppose said rotor cutting edge so as to produce a shearing action between said stator cutting edge and said rotor cutting edge when said rotor is rotated relative to said stator; a rotary drive mechanism configured to rotate said rotor; and a tubular sheath communicating with said cutting tool, said sheath defining a discharge path for deposits detached by said cutting tool.
Claim 3
Dependent Claim
34 words
A catheter according to claim 1, wherein said rotor is substantially cylindrical in a portion including said rotor cutting edge and said stator is substantially cylindrical in a portion including said stator cutting edge.
Claim 4
Dependent Claim
56 words
A catheter according to claim 1, wherein said rotor further comprises a first rotor shearing slot provided in said circumferential surface of said rotor and which includes said rotor cutting edge, and wherein said stator further comprises a first stator shearing slot provided in said circumferential surface of said stator which includes said stator cutting edge.
Claim 5
Dependent Claim
57 words
A catheter according to claim 3, wherein said rotor further comprises a second rotor shearing slot provided in said circumferential surface of said rotor 180° from said first rotor shearing slot, and wherein said stator further comprises a second stator shearing slot provided in said circumferential surface of said stator 180° from said first stator shearing slot.
Claim 6
Dependent Claim
28 words
A catheter according to claim 1, wherein said rotor cutting edge and said stator cutting edge extend at least substantially in an axial direction of said cutting tool.
Claim 7
Dependent Claim
33 words
A catheter according to claim 1, wherein at least one of said rotor cutting edge and said stator cutting edge includes at least one undulation along an axial direction of said cutting tool.
Claim 8
Dependent Claim
19 words
A catheter according to claim 1, wherein said rotor cutting edge and said stator cutting edge are knife edges.
Claim 9
Dependent Claim
24 words
A catheter according to claim 1, wherein said rotor is at least partially tapered in a direction of a front end of said rotor.
Claim 10
Dependent Claim
30 words
A catheter according to claim 8, wherein said rotor includes means for breaking up loose and solid deposits, said means for breaking provided on the front end of said rotor.
Claim 11
Dependent Claim
39 words
A catheter according to claim 9, wherein said means for breaking up loose and solid deposits comprises a front face, a first and a second beveled surface adjacent said front face, wherein said front face includes forwardly extending projections.
Claim 12
Dependent Claim
21 words
A catheter according to claim 1, wherein at least one of said stator and said rotor is constructed of a metal.
Claim 13
Dependent Claim
45 words
A catheter according to claim 1, further comprising a flexible drive shaft connecting said rotary drive mechanism with said rotor, and a guide wire, wherein said guide wire is provided within said flexible drive shaft and wherein said guide wire extends through said tubular sheath.
Claim 14
Dependent Claim
24 words
A catheter according to claim 1, wherein said stator is fixed to said tubular sheath, wherein said tubular sheath serves as a catheter tube.
Claim 15
Dependent Claim
34 words
A catheter according to claim 13, wherein said stator includes at least one hole for anchoring said tubular sheath, said sheath being press-fitted into said stator and wherein said sheath is made of plastic.
Claim 16
Dependent Claim
17 words
A catheter according to claim 1, wherein said stator is configured to rotate around its longitudinal axis.
Claim 17
Dependent Claim
35 words
A catheter according to claim 15, wherein said stator is configured to rotate over a range of rotation such that said cutting tool can remove deposits over 360° of a circumference of said cutting tool.
Claim 18
Dependent Claim
38 words
A catheter according to claim 15, wherein said stator or said tubular sheath is connected to a swivel drive mechanism, wherein an output speed of said swivel drive mechanism is substantially below that of said rotary drive mechanism.
Claim 19
Dependent Claim
32 words
A catheter according to claim 1, wherein said rotary drive mechanism is connected to said rotor by a flexible drive shaft, wherein said flexible drive shaft is provided within said tubular sheath.
Claim 20
Dependent Claim
37 words
A catheter according to claim 18, wherein said flexible drive shaft has a helical shape such that when said shaft is rotated relative to said tubular sheath, said shaft conveys broken-up deposits towards said rotary drive mechanism.
Claim 21
Dependent Claim
16 words
A catheter according to claim 19, wherein a guide wire extends through said flexible drive shaft.
References Cited (Backward Citations)
US4857046A
Cited
US5269751A
Cited
WO1991001114A1
Cited
US5112299A
Cited
WO1992007500A2
Cited
EP0582533A1
Cited
US5383884A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 2002-02-22 | 2002-08-24 | 2003-02-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2006-02-22 | 2006-08-24 | 2007-02-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2010-02-22 | 2010-08-24 | 2011-02-23 | $7700.00 | Window Closed / Lapsed |