US6666874B2
Expired / Lapsed
US
⏱️ 0.0 years remaining
Rotational atherectomy system with serrated cutting tip
Assignee: Covidien LP
•
Filing: 1999-09-17
•
Granted: 2003-12-23
•
Expires: 2019-09-17
Abstract
Abstract An elongate tubular body extends between a rotatable cutter and a control. The cutter is connected to the control with a rotatable element and has a serrated surface. A vacuum is applied through an annular passage defined between the tubular body and the rotatable element. The control has an indicator that reveals resistance to rotation and/or reduction in flow. Material that has been processed by the cutter is aspirated through the tubular body for disposal. The control enables rotation of the rotatable element only following application of a predetermined level of vacuum.
Inventors
- 👤 Harold A. Heitzmann
- 👤 John S. Honeycutt
- 👤 Paul Taylor
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 21:48
CPC Classifications
A; A61; A61B; A61B17/00; A61B17/32; A61B17/3205; A61B17/3207; A61B17/320758; A61B2017/00017; A61B2017/00022; A61B2017/00681; A61B2017/00685; A61B17/22; A61B2017/22051; A61B2017/22052; A61B2017/320004; A61B2017/320008; A61B90/00; A61B90/06; A61B2090/062; A61B2090/064; A61B2217/00; A61B2217/002; A61B2217/005
Claims Analysis
Total Claims: 36
Claim 1
Independent Claim
67 words
A rotational medical device comprising an elongate, flexible tubular body, the body having a proximal end and a distal end, a rotatable drive shaft extending through the body; and a rotatable cutter at the distal end of the body and connected to the drive shaft, the cutter comprising an inclined cutting thread extending at least part way around the cutter, the thread being at least partially discontinuous.
Claim 2
Dependent Claim
67 words
A rotational medical device comprising an elongate, flexible tubular body, the body having a proximal end and a distal end, a rotatable drive shaft extending through the body; and a rotatable cutter at the distal end of the body and connected to the drive shaft, the cutter comprising an inclined cutting thread extending at least part way around the cutter, the thread being at least partially discontinuous.
Claim 3
Dependent Claim
33 words
A rotational medical device as in claim 1 , wherein the cutter comprises a tubular body having an outer wall and the thread extends along a spiral path extending around the outer wall.
Claim 4
Dependent Claim
21 words
A rotational medical device as in claim 1 , wherein the thread defines at least one helical channel around the cutter.
Claim 5
Dependent Claim
26 words
A rotational medical device as in claim 3 , further comprising an aspiration lumen extending through the tubular body and in communication with the helical channel.
Claim 6
Dependent Claim
18 words
A rotational medical device as in claim 1 , wherein the cutter is positioned within the tubular body.
Claim 7
Dependent Claim
26 words
A rotational medical device as in claim 1 , wherein at least a portion of the cutter extends beyond the distal end of the tubular body.
Claim 8
Dependent Claim
35 words
A rotational medical device as in claim 1 , wherein the discontinuities in the thread are formed by a plurality of faces that slope relative to a plane extending through an axis of cutter rotation.
Claim 9
Dependent Claim
28 words
A rotational medical device as in claim 7 , wherein the faces slope at an angle between about 45 degrees and about 85 degrees relative to the plane.
Claim 10
Dependent Claim
24 words
A rotational medical device as in claim 8 , wherein the faces slope at an angle of about 60 degrees relative to the plane.
Claim 11
Dependent Claim
27 words
A rotational medical device as in claim 7 , wherein the faces have at least one straight wall extending radially outward from the axis of cutter rotation.
Claim 12
Dependent Claim
16 words
A rotational medical device as in claim 1 , wherein the thread is only partially discontinuous.
Claim 13
Dependent Claim
83 words
A rotational medical device comprising an elongate, flexible tubular body, having a proximal end and a distal end, a rotatable drive shaft extending through the body, a rotatable cutter positioned at the distal end of the body and coupled to the drive shaft, a control positioned at the proximal end of the body, and an aspiration channel extending axially through the tubular body, the cutter comprising an outer wall having at least one serrated thread extending along a spiral path on the wall.
Claim 14
Dependent Claim
83 words
A rotational medical device comprising an elongate, flexible tubular body, having a proximal end and a distal end, a rotatable drive shaft extending through the body, a rotatable cutter positioned at the distal end of the body and coupled to the drive shaft, a control positioned at the proximal end of the body, and an aspiration channel extending axially through the tubular body, the cutter comprising an outer wall having at least one serrated thread extending along a spiral path on the wall.
Claim 15
Dependent Claim
30 words
A rotational medical device as in claim 12 , wherein the thread has a length within the range of from about 0.25 turns and about 10 turns around the cutter.
Claim 16
Dependent Claim
25 words
A rotational medical device as in claim 12 , wherein the thread has a pitch within the range of from about 0.005 to about 0.060.
Claim 17
Dependent Claim
31 words
A rotational medical device as in claim 12 further comprising a regulator on the control for enabling rotation of the drive shaft only while vacuum is applied to the aspiration channel.
Claim 18
Dependent Claim
95 words
A rotational medical device comprising an elongate, flexible tubular body, the body having a proximal end and a distal end, a rotatable drive shaft extending through the body; and a rotatable cutter at the distal end of the body and connected to the drive shaft, the cutter comprising a cutter body having a proximal end and a distal end, a longitudinal axis of rotation extending between the proximal end and the distal end, a helical thread extending around at least a distal portion of the cutter body, and the thread having at least one serration.
Claim 19
Dependent Claim
95 words
A rotational medical device comprising an elongate, flexible tubular body, the body having a proximal end and a distal end, a rotatable drive shaft extending through the body; and a rotatable cutter at the distal end of the body and connected to the drive shaft, the cutter comprising a cutter body having a proximal end and a distal end, a longitudinal axis of rotation extending between the proximal end and the distal end, a helical thread extending around at least a distal portion of the cutter body, and the thread having at least one serration.
Claim 20
Dependent Claim
31 words
A rotational medical device as in claim 16 further comprising at least one radially outwardly extending flange on the cutter body, the flange rotationally connecting the cutter to the tubular body.
Claim 21
Dependent Claim
22 words
A rotational medical device as in claim 17 , wherein the flange is located at the proximal end of the cutter body.
Claim 22
Dependent Claim
18 words
A rotational medical device as in claim 16 further comprising a guidewire lumen extending through the cutter body.
Claim 23
Dependent Claim
22 words
A rotational medical device as in claim 16 , wherein the serration extends in a direction generally normal to the longitudinal axis.
Claim 24
Dependent Claim
19 words
A rotational medical device as in claim 16 , wherein the serration extends radially outward from the longitudinal axis.
Claim 25
Dependent Claim
25 words
A rotational medical device as in claim 16 , wherein the serration comprises a sloped face relative to a plane extending through the longitudinal axis.
Claim 26
Dependent Claim
97 words
A rotational medical device comprising an elongate, flexible tubular body, the body having a proximal end and a distal end, a rotatable drive shaft extending through the body; and a rotatable cutter at the distal end of the body and connected to the drive shaft, the cutter comprising a cutter body having a proximal end and a distal end, a longitudinal axis of rotation extending between the proximal end and the distal end, a helical thread extending around at least a distal portion of the cutter body, and at least one portion of the thread being discontinuous.
Claim 27
Dependent Claim
97 words
A rotational medical device comprising an elongate, flexible tubular body, the body having a proximal end and a distal end, a rotatable drive shaft extending through the body; and a rotatable cutter at the distal end of the body and connected to the drive shaft, the cutter comprising a cutter body having a proximal end and a distal end, a longitudinal axis of rotation extending between the proximal end and the distal end, a helical thread extending around at least a distal portion of the cutter body, and at least one portion of the thread being discontinuous.
Claim 28
Dependent Claim
18 words
A rotational medical device as in claim 23 , wherein a serration causes the thread to be discontinuous.
Claim 29
Dependent Claim
21 words
A rotational medical device as in claim 24 , wherein said serration is disposed at a distal portion of the thread.
Claim 30
Dependent Claim
25 words
A rotational medical device as in claim 23 , wherein a series of teeth define a serrated surface that causes the thread to be discontinuous.
Claim 31
Dependent Claim
23 words
A rotational medical device as in claim 26 , wherein the series of teeth are disposed at a distal portion of the thread.
Claim 32
Dependent Claim
24 words
A rotational medical device as in claim 27 , wherein the series of teeth extend around at least one full turn of the thread.
Claim 33
Dependent Claim
35 words
A rotational medical device as in claim 23 , wherein the discontinuity in the thread is formed by a plurality of faces that slope relative to a plane extending through the longitudinal axis of rotation.
Claim 34
Dependent Claim
28 words
A rotational medical device as in claim 29 , wherein the faces slope at an angle between about 45 degrees and about 85 degrees relative to the plane.
Claim 35
Dependent Claim
24 words
A rotational medical device as in claim 30 , wherein the faces slope at an angle of about 60 degrees relative to the plane.
Claim 36
Dependent Claim
27 words
A rotational medical device as in claim 29 , wherein the faces have at least one straight wall extending radially outward from the longitudinal axis of rotation.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 2006-12-22 | 2007-06-23 | 2007-12-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2010-12-22 | 2011-06-23 | 2011-12-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2014-12-22 | 2015-06-23 | 2015-12-23 | $7700.00 | Window Closed / Lapsed |