Patent US2181756A successfully refreshed from Google Patents.
Patent US2776096A successfully refreshed from Google Patents.
Patent US3576054A successfully refreshed from Google Patents.
Patent US2438965A successfully refreshed from Google Patents.
Patent US2366358A successfully refreshed from Google Patents.
US5989271A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Flexible tip rheolytic thrombectomy catheter and method of constructing same
Assignee: Bayer Medical Care Inc
•
Filing: 1998-11-09
•
Granted: 1999-11-23
•
Expires: 2018-11-09
Abstract
Abstract A rheolytic thrombectomy catheter and method of using same to remove thrombus from a body vessel or other body cavity. The rheolytic thrombectomy catheter has a first tube with a distal open end and a second tube aligned within the first tube and having a flexible tip assembly. A tapered and flexible tip follows a guidewire within and along tortuous and difficult vasculature paths to the site of thrombus. The flexible tip assembly, includes a soft flexible tip and also includes a hard plastic shell offering structural integrity and rigid alignment between a toroidal loop and an inner body to prevent lever arm distortion and to maintain spray gap alignment for saline jet flow emanating from the toroidal loop. Saline jets dislodge, entrain, and break thrombus into pieces which are evacuated through the dual lumen tube. A construction method is also included for mounting of the toroidal loop within the hard plastic shell and attachment of the soft tapered and flexible tip with sufficient bond strength to function as intended for use.
Inventors
- 👤 Michael J. Bonnette
- 👤 John Edward Morris
- 👤 Steven E. Wiesel
- 👤 Cindy M. Setum
- 👤 Robert C. Dutcher
- 👤 William J. Drasler
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 18:52
CPC Classifications
A; A61; A61B; A61B17/00; A61B17/32; A61B17/3203; A61B17/32037; A61B17/22; A61B2017/22038; A61B2017/22045
Claims Analysis
Total Claims: 20
Claim 1
Independent Claim
185 words
A rheolytic thrombectomy catheter for the removal of thrombus from a body vessel having a high pressure hypo-tube, the end of which is formed into a toroidal loop having a plurality of inwardly directed jets for directing a flow of pressurized fluid to impinge on, and carry, a dislodged thrombus into an exhaust/evacuation tube, the improvement comprising; a. rigid tubular shell positioned adjacent said toroidal loop; b. an aperture in said rigid tubular shell aligned to permit fluid carrying dislodged thrombus to enter a gap proximal to said rigid tubular shell wherein said dislodged thrombus is propelled into the distal end of an axially centered exhaust/evacuation tube; and, c. a flexible tip member at the distal end of said rigid tubular shell, said flexible tip member having a tip of reduced diameter at the distal end thereof and a reduced diameter shoulder portion positioned within said rigid tubular shell and affixed thereto, whereby the distal end of said flexible tip member follows turns in said vessel and said rigid tubular shell prevents distortion of said toroidal loop as said catheter is inserted into said vessel.
Claim 2
Dependent Claim
185 words
A rheolytic thrombectomy catheter for the removal of thrombus from a body vessel having a high pressure hypo-tube, the end of which is formed into a toroidal loop having a plurality of inwardly directed jets for directing a flow of pressurized fluid to impinge on, and carry, a dislodged thrombus into an exhaust/evacuation tube, the improvement comprising; a. rigid tubular shell positioned adjacent said toroidal loop; b. an aperture in said rigid tubular shell aligned to permit fluid carrying dislodged thrombus to enter a gap proximal to said rigid tubular shell wherein said dislodged thrombus is propelled into the distal end of an axially centered exhaust/evacuation tube; and, c. a flexible tip member at the distal end of said rigid tubular shell, said flexible tip member having a tip of reduced diameter at the distal end thereof and a reduced diameter shoulder portion positioned within said rigid tubular shell and affixed thereto, whereby the distal end of said flexible tip member follows turns in said vessel and said rigid tubular shell prevents distortion of said toroidal loop as said catheter is inserted into said vessel.
Claim 3
Dependent Claim
16 words
The catheter of claim 1, wherein said rigid tubular shell is affixed to said toroidal loop.
Claim 4
Dependent Claim
19 words
The catheter of claim 2, wherein said rigid tubular shell is affixed to said toroidal loop with an adhesive.
Claim 5
Dependent Claim
11 words
The catheter of claim 3, wherein said adhesive is an cyanoacrylate.
Claim 6
Dependent Claim
32 words
The catheter of claim 2, wherein said rigid tubular shell includes a stem portion extending proximally and providing support for said high pressure hypo-tube at a point proximal of said toroidal loop.
Claim 7
Dependent Claim
47 words
The catheter of claim 5, wherein said stem portion is axially displaced from the center of said rigid tubular shell and having a diameter less than half the diameter of a remainder of said rigid shell and a centrally located hole to accommodate said high pressure hypo-tube.
Claim 8
Dependent Claim
45 words
The catheter of claim 6, wherein said stem portion supports said high pressure hypo-tube in a region displaced from said toroidal loop thereby preventing distortion of said toroidal loop from a transverse axial alignment with respect to a longitudinal portion of said high pressure hypo-tube.
Claim 9
Dependent Claim
15 words
The catheter of claim 2, wherein said rigid tubular shell is a hard plastic material.
Claim 10
Dependent Claim
12 words
The catheter of claim 8, wherein said hard plastic material is polycarbonate.
Claim 11
Dependent Claim
16 words
The catheter of claim 2, wherein said flexible tip member is a soft polymer plastic material.
Claim 12
Dependent Claim
13 words
The catheter of claim 10, wherein said soft polymer plastic material is polyurethane.
Claim 13
Dependent Claim
24 words
The catheter of claim 1, wherein said aperture in said rigid tubular shell comprises an annular slot extending partially around said rigid tubular shell.
Claim 14
Dependent Claim
17 words
The catheter of claim 1, wherein said flexible tip member includes an axially positioned hole extending therethrough.
Claim 15
Dependent Claim
27 words
The catheter of claim 13, wherein said axially positioned hole has a diameter sufficient to accommodate a guidewire during insertion of said catheter into a body vessel.
Claim 16
Dependent Claim
20 words
The catheter of claim 14, further including a guidewire passing through said axially positioned hole in said flexible tip member.
Claim 17
Dependent Claim
13 words
The catheter of claim 15, wherein said guidewire passes though said exhaust/evacuation tube.
Claim 18
Dependent Claim
20 words
The catheter of claim 1, further including an exhaust/evacuation tube surrounding said high pressure hypo-tube and connected to said catheter.
Claim 19
Dependent Claim
24 words
The catheter of claim 17, further including a cylindrical outer shell affixed to the hypo-tube on a location proximal to said rigid tubular shell.
Claim 20
Dependent Claim
15 words
The catheter of claim 18, wherein said exhaust/evacuation tube is affixed to said outer shell.
References Cited (Backward Citations)
US5320599A
Cited
US5370609A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 2002-11-22 | 2003-05-24 | 2003-11-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2006-11-22 | 2007-05-24 | 2007-11-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2010-11-22 | 2011-05-24 | 2011-11-23 | $7700.00 | Window Closed / Lapsed |