Patent EP0817594B1 successfully refreshed from Google Patents.
EP0817594B1
Expired / Lapsed
EP
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Catheter for detaching abnormal deposits in human blood vessels
Assignee: Straub Medical AG
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Filing: 1996-03-07
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Granted: 2002-06-05
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Expires: 2016-03-07
Abstract
Abstract PCT No. PCT/CH96/00085 Sec. 371 Date Sep. 29, 1997 Sec. 102(e) Date Sep. 29, 1997 PCT Filed Mar. 7, 1996 PCT Pub. No. WO96/29941 PCT Pub. Date Oct. 3, 1996The 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
EP
Data Source
google_patents
Last Synchronized
2026-10-23 13:49
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: 20
Claim 1
Independent Claim
101 words
Catheter for detaching abnormal deposits from
blood vessels in humans, with a cutting tool which is
arranged at its front end (12a) and which has a rotor
(16) which can be set in rotation by means of a rotary
drive mechanism (20a) of a drive unit (20), and with a
tubular sheath (22) for discharging the deposits which
have been detached, characterized in that the cutting
tool has a stator (14) with a stator portion (14a), and in that cutting edges (14d, 16d) are arranged on the
stator portion (14a) and on the rotor (16) to interact
in a shearing action.
Claim 2
Dependent Claim
69 words
Catheter according to Claim 1, characterized
in that the stator portion (14a) and the rotor (16) are
at least approximately cylindrical, at least in the
region of the cutting edges (14d, 16d), in that the
rotor (16) surrounds the stator portion (14a) as
external rotor, and in that the cutting edges (14d,
16d) are arranged in the circumferential surfaces of
the rotor (16) and of the stator portion (14a).
Claim 3
Dependent Claim
40 words
Catheter according to Claim 2, characterized
in that shearing slots (14b, 14c; 16b, 16c) are
arranged in the circumferential surfaces of the stator
portion (14a) and of the rotor (16), their margins
being designed as the cutting edges (14d, 16d).
Claim 4
Dependent Claim
39 words
Catheter according to Claim 3, characterized
in that the stator portion (14a) and the rotor (16)
have in each case two shearing slots (14b, 14c; 16b,
16c) which are offset by 180° to each other in the
circumferential direction.
Claim 5
Dependent Claim
24 words
Catheter according to one of the preceding
claims, characterized in that the cutting edges (14d,
16d) extend at least approximately in the axial
direction.
Claim 6
Dependent Claim
33 words
Catheter according to one of the preceding
claims, characterized in that at least one of the
cutting edges (14d) runs in an undulating configuration
in the axial direction, relative to a cylindrical
surface.
Claim 7
Dependent Claim
22 words
Catheter according to one of the preceding
Claims, characterized in that the cutting edges (16d)
of the rotor (16) are knife edges.
Claim 8
Dependent Claim
27 words
Catheter according to one of the preceding
claims, characterized in that the rotor (16) is at
least partially tapered in the direction of its front
end (16a).
Claim 9
Dependent Claim
32 words
Catheter according to Claim 8, characterized
in that the rotor (16) has, at its front, means (16e,
16f, 16g, 16h, 16i) for breaking up loose and solid
deposits, for example blood clots.
Claim 10
Dependent Claim
43 words
Catheter according to Claim 9, characterized
in that the means include one front face (16g) and two
adjoining bevelled surfaces (16e, 16f) lying opposite
each other, and in that the front face (16g) has, on
the circumference, horn-like, forwardly extending projections
(16h, 16i).
Claim 11
Dependent Claim
22 words
Catheter according to one of the preceding
claims, characterized in that the stator (14) and/or
the rotor (16) are made of metal.
Claim 12
Dependent Claim
35 words
Catheter according to one of the preceding
claims, characterized in that , inside the flexible
drive shaft (32), a guide wire (24) which is preferably
independent of the catheter extends through the said
catheter (12).
Claim 13
Dependent Claim
35 words
Catheter according to one of the preceding
claims, characterized in that the stator (14) is
connected, in a manner fixed in terms of rotation and
tensioning, to the tubular sheath (22) serving as
catheter tube.
Claim 14
Dependent Claim
30 words
Catheter according to one of the preceding
claims, characterized in that the stator (14) is
mounted such that it revolves or can swivel to and fro
about its longitudinal axis.
Claim 15
Dependent Claim
35 words
Catheter according to Claim 14, characterized
in that the swivel angle of the stator (14) is so great
that at least an angle of removal of 360° is covered by
the cutting tool (14d, 16d).
Claim 16
Dependent Claim
39 words
Catheter according to Claim 14 or 15, characterized in that the stator (14) or the tubular
sheath (22) is connected to a swivel drive mechanism
(20b) whose output speed is substantially below that of
the rotary drive mechanism (20a).
Claim 17
Dependent Claim
62 words
Catheter according to one of Claims 13 to 16, characterized in that the sleeve-like stator (14) has
in its circumferential surface, at its end adjacent to
the tubular sheath (22), at least one hole (14e) for
anchoring the sheath (22), which is made of plastic and
is press-fitted into the stator (14), in a manner fixed
in terms of rotation and tensioning.
Claim 18
Dependent Claim
50 words
Catheter according to one of the preceding
claims, characterized in that the rotor (16) is
connected to the front end (32a) of a flexible drive
shaft (32) mounted in the tubular sheath (22), the rear
end of which drive shaft (32) can be connected to the
rotary drive mechanism (20a).
Claim 19
Dependent Claim
49 words
Catheter according to Claim 18, characterized
in that the flexible drive shaft (32) is designed as a
conveyor worm or conveyor screw and is wound helically
in such a way that, in the driven state, it conveys the
broken-up deposits in the direction of the rotary drive
mechanism (20a).
Claim 20
Dependent Claim
27 words
Catheter according to Claim 19, characterized
in that a guide wire (24) extends coaxially through the
flexible drive shaft (32) designed as conveyor worm or
conveyor screw.
References Cited (Backward Citations)
No citation records indexed.
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