US6190394B1
Expired / Lapsed
US
⏱️ 0.0 years remaining
Medical retrieval basket
Assignee: Annex Medical Inc
•
Filing: 1999-11-05
•
Granted: 2001-02-20
•
Expires: 2019-11-05
Abstract
Abstract A medical retrieval basket for removing objects such as urinary and biliary calculi from the body. The basket comprises an elongated flexible tube and a cage which is extendible from the distal end of the tube and can be collapsed by withdrawing into the tube by means of an actuation cable which passes through the tube. The cage consists of a plurality of flexible elements which are outwardly disposed to form a space for entrapping objects. The flexible elements are constructed of a shape memory material, allowing the cage to resume its original configuration when extended from the tube. The configuration of the cage is such that by means of rotating the cage, differing sizes, cross sectional shapes and/or spacing of the flexible elements may be presented to a given portion of the object to be removed. Rotation of the cage is controlled more precisely using an actuation cable constructed of nickel titanium.
Inventors
- 👤 Stuart J. Lind
- 👤 Eugene C. Karels
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 08:17
CPC Classifications
A; A61; A61B; A61B17/00; A61B17/22; A61B17/221; A61B2017/2212
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
192 words
A medical retrieval basket for extracting an object from a body comprising: a cage having a longitudinal axis and an expandable portion consisting of a plurality of flexible elements which are outwardly disposed to form a space for entrapping said object, a tubular means for the collapsing of said flexible elements when withdrawn into said tubular means, an actuation means to enable the movement of said flexible elements into and out of said tubular means and to enable rotation of said cage, the impivement wherein the flexible elements, when outwardly disposed, include a plurality of flexible elements, forming a plural set, which are spaced relatively closely to each other and spaced relatively far from adjacent flexible elements outside of the plural set, the flexible elements, when outwardly disposed, also including a single flexible element spaced relatively far from adjacent flexible elements, wherein there are a plurality of plural sets and at least one single flexible element spaced around said longitudinal axis, whereby rotation of said actuation means will cause rotation of said cage in order to present either a single flexible element or a said plural set to the object being removed.
Claim 2
Dependent Claim
192 words
A medical retrieval basket for extracting an object from a body comprising: a cage having a longitudinal axis and an expandable portion consisting of a plurality of flexible elements which are outwardly disposed to form a space for entrapping said object, a tubular means for the collapsing of said flexible elements when withdrawn into said tubular means, an actuation means to enable the movement of said flexible elements into and out of said tubular means and to enable rotation of said cage, the impivement wherein the flexible elements, when outwardly disposed, include a plurality of flexible elements, forming a plural set, which are spaced relatively closely to each other and spaced relatively far from adjacent flexible elements outside of the plural set, the flexible elements, when outwardly disposed, also including a single flexible element spaced relatively far from adjacent flexible elements, wherein there are a plurality of plural sets and at least one single flexible element spaced around said longitudinal axis, whereby rotation of said actuation means will cause rotation of said cage in order to present either a single flexible element or a said plural set to the object being removed.
Claim 3
Dependent Claim
19 words
The medical retrieval basket of claim 1 wherein the actuation means is a cable containing a shape memory alloy.
Claim 4
Dependent Claim
20 words
The medical retrieval basket of claim 1 further including a substantially cylindrical tip at the distal end of said cage.
Claim 5
Dependent Claim
17 words
The medical retrieval basket of claim 1 wherein said flexible elements are in an approximately helical configuration.
Claim 6
Dependent Claim
30 words
The medical retrieval basket of claim 1 wherein said flexible elements are metallic with the materials being selected from a group consisting of stainless steel and shape memory alloys .
Claim 7
Dependent Claim
141 words
A medical retrieval basket for extracting an object from a body comprising: a cage having a longitudinal axis and an expandable portion consisting of a plurality of flexible elements which are outwardly disposed to form a space for entrapping said object, a tubular means for the collapsing of said flexible elements when withdrawn into said tubular means, an actuation means to enable the movement of said flexible elements into and out of said tubular means and to enable rotation of said cage, the improvement wherein each of said flexible elements has a predetermined cross sectional shape and said cage incorporates a plurality of the flexible element cross sectional shape, whereby rotation of said actuation means about said longitudinal axis will cause rotation of said cage in order to present differing said flexible element cross sectional shape to the object being removed.
Claim 8
Dependent Claim
141 words
A medical retrieval basket for extracting an object from a body comprising: a cage having a longitudinal axis and an expandable portion consisting of a plurality of flexible elements which are outwardly disposed to form a space for entrapping said object, a tubular means for the collapsing of said flexible elements when withdrawn into said tubular means, an actuation means to enable the movement of said flexible elements into and out of said tubular means and to enable rotation of said cage, the improvement wherein each of said flexible elements has a predetermined cross sectional shape and said cage incorporates a plurality of the flexible element cross sectional shape, whereby rotation of said actuation means about said longitudinal axis will cause rotation of said cage in order to present differing said flexible element cross sectional shape to the object being removed.
Claim 9
Dependent Claim
19 words
The medical retrieval basket of claim 6 wherein the actuation means is a cable containing a shape memory alloy.
Claim 10
Dependent Claim
20 words
The medical retrieval basket of claim 6 further including a substantially cylindrical tip at the distal end of said cage.
Claim 11
Dependent Claim
17 words
The medical retrieval basket of claim 6 wherein said flexible elements are in an approximately helical configuration.
Claim 12
Dependent Claim
30 words
The medical retrieval basket of claim 6 wherein said flexible elements are metallic with the materials being selected from a group consisting of stainless steels and other shape memory alloys.
References Cited (Backward Citations)
US2943626A
Cited
US2918919A
Cited
US3008467A
Cited
US4046149A
Cited
US4046150A
Cited
US4198960A
Cited
US4299225A
Cited
US4347846A
Cited
US4611594A
Cited
US4590938A
Cited
US4633871A
Cited
US4612931A
Cited
US4625726A
Cited
US4807626A
Cited
US5057114A
Cited
US5064428A
Cited
US5330482A
Cited
US5176688A
Cited
US5496330A
Cited
US5792145A
Cited
US6093196A
Cited
US5944728A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 2004-02-20 | 2004-08-21 | 2005-02-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2008-02-20 | 2008-08-21 | 2009-02-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2012-02-20 | 2012-08-21 | 2013-02-20 | $7700.00 | Window Closed / Lapsed |