EP0409372A1
Expired / Lapsed
EP
⏱️ 0.0 years remaining
Telescopic control unit for an atherectomy device
Assignee: InterVentional Technologies Inc
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Filing: 1990-02-27
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Granted: —
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Expires: 2010-02-27
Abstract
Abstract A telescopic control unit (10) for an atherectomy device to incrementally cut a passageway (52) through obstructive tissue (46) in arteries comprises a cylindrical-shaped hollow housing (12) which has a tube-shaped telescoping insert (16) coaxially aligned within an interior chamber of the housing. The telescoping insert is held in place with respect to the housing by threadably engaging a ring-shaped cap (14) to the housing which causes an O-ring (32) to urge against the insert and hold it securely in place. A tube-shaped sheath or guiding catheter (18) for an atherectomy cutter is connected to the distal end of the insert. A cutter assembly comprised of a torque tube (22) and cutter (50) is slidably carried inside the guiding catheter. The torque tube is operably connected to a handpiece drive unit (66) coupled to the control unit to rotatably drive the cutter. Selective control of telescoping insert incrementally advances the handpiece drive unit, and then the cutter, deeper into the artery. The obstructive tissue cuttings are removed from the artery by a suction system which is attached at the proximal end of the housing. The housing device is also equipped with a port (26) for injecting medicinal fluids therethrough to aid in the operation.
Inventors
- 👤 Gary Gomringer
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-10-23 08:05
CPC Classifications
A; A61; A61B; A61B17/00; A61B17/32; A61B17/3205; A61B17/3207; A61B17/320758; A61M; A61M25/00; A61M25/01; A61M25/0105
Claims Analysis
Total Claims: 17
Claim 1
Independent Claim
54 words
A device for controlling the removal of obstructive tissue comprising a substantially cylindrical-shaped hollow housing; a tube-shaped insert coaxially aligned and slidingly disposed within said housing, said insert having its distal end connectable to said sheath, and a releasable insert holding means mounted on said housing for selectively moving said insert within said housing.
Claim 2
Independent Claim
54 words
A device for controlling the removal of obstructive tissue comprising a substantially cylindrical-shaped hollow housing; a tube-shaped insert coaxially aligned and slidingly disposed within said housing, said insert having its distal end connectable to said sheath, and a releasable insert holding means mounted on said housing for selectively moving said insert within said housing.
Claim 3
Dependent Claim
42 words
A device according to claim 1 wherein said insert holding means comprises a ring-shaped cap threadably engageable with said housing for squeezing an O-ring positioned between said cap and said housing against said insert when said cap is engaged with said housing.
Claim 4
Dependent Claim
27 words
A device according to claim 2 wherein said cap has a concentric hole for slideably holding said insert and for coaxially aligning said insert inside said housing.
Claim 5
Dependent Claim
22 words
A device according to Claim 2 or 3 wherein said cap has a grooved outer surface for enabling manual engagement and disengagement.
Claim 6
Dependent Claim
22 words
A device according to Claim 2, 3 or 4 wherein said housing , said cap and said insert are made of polycarbonate.
Claim 7
Independent Claim
19 words
A device according to any of Claims 2 to 5 wherein said O-ring is made of an elastomeric material.
Claim 8
Independent Claim
27 words
A device according to any preceding claim wherein said insert is flanged at a proximal end thereof for providing longitudinal alignment of said insert with said housing.
Claim 9
Independent Claim
25 words
A device according to any preceding claim wherein said housing has interior threads at a proximal end thereof for threadable engagement with a suction means.
Claim 10
Independent Claim
22 words
A device according to any preceding Claim further comprising a port in said housing for injecting medicinal fluids inside of said housing.
Claim 11
Independent Claim
18 words
A device according to any preceding Claim wherein said insert is connected to said sheath by threadable engagement.
Claim 12
Independent Claim
19 words
A device according to any preceding Claim wherein said insert is connectable to said sheath by a Luer fitting.
Claim 13
Independent Claim
117 words
A method for incrementally cutting through obstructive material in a conduit by selectively displacing a support sheath relative to a cutter with a telescopic control unit which comprises the steps of: (A) Positioning said cutter to come into contact with said obstructive material; (B) Cutting said obstruction by rotating said cutter; (C) Displacing said sheath in a proximal direction relative to said cutter to a predetermined position; (D) Rotating said cutter to drill a passageway through said obstruction proportional to the distance of displacement in step (C); (E) Repeating step (C) and step (D) until a continuous passageway is drilled through said obstruction; and (F) Withdrawing said obstructive material, said cutter, and said sheath from said conduit.
Claim 14
Independent Claim
117 words
A method for incrementally cutting through obstructive material in a conduit by selectively displacing a support sheath relative to a cutter with a telescopic control unit which comprises the steps of: (A) Positioning said cutter to come into contact with said obstructive material; (B) Cutting said obstruction by rotating said cutter; (C) Displacing said sheath in a proximal direction relative to said cutter to a predetermined position; (D) Rotating said cutter to drill a passageway through said obstruction proportional to the distance of displacement in step (C); (E) Repeating step (C) and step (D) until a continuous passageway is drilled through said obstruction; and (F) Withdrawing said obstructive material, said cutter, and said sheath from said conduit.
Claim 15
Dependent Claim
73 words
A method according to Claim 12 wherein positioning said cutter to come into contact with said obstructive material comprises the steps of: (A) inserting a guide wire through a tip of said cutter; (B) sliding said guide wire through and past said obstructive material of said conduit; (C) positioning said cutter inside said sheath; and (D) sliding said sheath and said cutter through said conduit to a position adjacent to said obstructive tissue.
Claim 16
Dependent Claim
90 words
A method according to Claim 12 or 13 wherein displacing of said sheath to a predetermined position by manipulating a cylindrical-shaped hollow housing, a ring-shaped cap and a tube-shaped insert of said telescopic control unit comprises the steps of: (A) disengaging said ring-shaped cap from said cylindrical-shaped hollow housing by counterclockwise rotation; (B) sliding said tube-shaped insert into said housing to a predetermined position; and (C) engaging said cap with said housing by clockwise rotation to prevent movement of said insert relative to said housing along the longitudinal axis thereof.
Claim 17
Dependent Claim
60 words
A method according to Claim 14 further comprising the steps of: (A) Injecting fluids through said housing during operation to enable use of said fluids in said cutting procedure; (B) Attaching a suction means to the proximal end of said housing for removing said obstructive material cuttings; and (C) Withdrawing said guide wire from said conduit after said cutting procedure.
References Cited (Backward Citations)
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