US5330482A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Endoscopic extraction devices, wire basket stone extractors, stent retrievers, snares and method of constructing the same
Assignee: Cook Medical Technologies LLC
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Filing: 1993-09-27
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Granted: 1994-07-19
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Expires: 2013-09-27
Abstract
Abstract Disclosed herein is an endoscopic extraction device which retains its operative usefulness for longer periods of time, and therefore need to be replaced less frequently. This extended instrument life is accomplished through the use of a composite wire construction, which includes, an inner monofilament wire of nitinol material surrounded by six stranded stainless steel wires. A wire construction in which a nitinol wire is surrounded by five stranded stainless steel wires is also disclosed. After constructing a wire basket in the normal manner using this material, heat is applied to the formed basket in its pre-formed shape to set the memory characteristics of the inner nitinol core.
Inventors
- 👤 Rebecca C. Gibbs
- 👤 Mark C. Martel
- 👤 Zdenek A. Fremund
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 21:57
CPC Classifications
A; A61; A61B; A61B17/00; A61B17/22; A61B17/221; D; D07; D07B; D07B1/00; D07B1/06; D07B1/0693; D07B5/00; A61B2017/2212; A61F; A61F2/00; A61F2/02; A61F2/30; A61F2002/30001; A61F2002/30003; A61F2002/3006; A61F2002/30092; A61F2210/00; A61F2210/0014; A61F2210/0019; D07B2201/00; D07B2201/20; D07B2201/2001; D07B2201/2006; D07B2201/2015; D07B2201/2023; D07B2201/2024; D07B2201/2029; D07B2201/2047; D07B2201/2051; D07B2201/2052; D07B2201/2059; D07B2201/2066; D07B2201/2067; D07B2205/00; D07B2205/30; D07B2205/3021; D07B2205/3085; Y; Y10; Y10T; Y10T428/00; Y10T428/12; Y10T428/12493; Y10T428/12771; Y10T428/12806; Y10T428/12861; Y10T428/12951; Y10T428/12972; Y10T428/12979
Claims Analysis
Total Claims: 26
Claim 1
Independent Claim
136 words
In a medical extraction device, said device including a retaining cannula and an extraction assembly including at least one extraction wire extendable from said retaining cannula into a pre-formed configuration for removing a foreign body from within a patient, the improvement comprising said extraction wire being constructed out of a composite construction which includes an inner monofilament wire of shape memory material surrounded by a plurality of at least five outer stranded wires stranded together about said inner monofilament wire of shape memory material, said outer stranded wires being made of material which is readily solderable as compared to said shape memory material, and wherein said extraction wire is attached to the rest of said extraction assembly by the soldering of said outer stranded wires to each other and to the rest of said extraction assembly.
Claim 2
Dependent Claim
136 words
In a medical extraction device, said device including a retaining cannula and an extraction assembly including at least one extraction wire extendable from said retaining cannula into a pre-formed configuration for removing a foreign body from within a patient, the improvement comprising said extraction wire being constructed out of a composite construction which includes an inner monofilament wire of shape memory material surrounded by a plurality of at least five outer stranded wires stranded together about said inner monofilament wire of shape memory material, said outer stranded wires being made of material which is readily solderable as compared to said shape memory material, and wherein said extraction wire is attached to the rest of said extraction assembly by the soldering of said outer stranded wires to each other and to the rest of said extraction assembly.
Claim 3
Dependent Claim
21 words
The improvement in a medical extraction device according to claim 1 in which said stranded wires are made of stainless steel.
Claim 4
Dependent Claim
21 words
The improvement in a medical extraction device according to claim 2 in which said stranded stainless steel wires includes five wires.
Claim 5
Dependent Claim
21 words
The improvement in a medical extraction device according to claim 2 in which said stranded stainless steel wires includes six wires.
Claim 6
Dependent Claim
19 words
The improvement in a medical extraction device according to claim 1 in which said shape memory material is nitinol.
Claim 7
Dependent Claim
19 words
The improvement in a medical extraction device according to claim 4 in which said shape memory material is nitinol.
Claim 8
Dependent Claim
19 words
The improvement in a medical extraction device according to claim 5 in which said shape memory material is nitinol.
Claim 9
Dependent Claim
33 words
The improvement in a medical extraction device according to claim 6 in which said inner wire has a diameter of about 0.005" and said surrounding wires each have a diameter of about 0.0055".
Claim 10
Dependent Claim
33 words
The improvement in a medical extraction device according to claim 7 in which said inner wire has a diameter of about 0.005" and said surrounding wires each have a diameter of about 0.0004".
Claim 11
Dependent Claim
179 words
An improvement in the method for constructing a medical extraction device, said medical extraction device including a retaining cannula, and an extraction assembly including at least one extraction wire extendable from said retaining cannula into a pre-formed configuration for removing a foreign body from within a patient, the improvement comprising the steps of: constructing said extraction wire out of a composite construction which includes an inner monofilament wire of shape memory material surrounded by a plurality of at least five outer stranded wires stranded together about said inner monofilament wire of shape memory material, said outer stranded wires being made from a material which is readily solderable as compared to said shape memory material; joining said extraction wire to the rest of said extraction assembly by soldering said stranded wires to each other and to the rest of said extraction assembly; forming said extraction wire into a desired configuration for use in said medical extraction device; and applying heat to said formed extraction wire to set the shape memory characteristics of said inner monofilament wire of shape memory material.
Claim 12
Dependent Claim
179 words
An improvement in the method for constructing a medical extraction device, said medical extraction device including a retaining cannula, and an extraction assembly including at least one extraction wire extendable from said retaining cannula into a pre-formed configuration for removing a foreign body from within a patient, the improvement comprising the steps of: constructing said extraction wire out of a composite construction which includes an inner monofilament wire of shape memory material surrounded by a plurality of at least five outer stranded wires stranded together about said inner monofilament wire of shape memory material, said outer stranded wires being made from a material which is readily solderable as compared to said shape memory material; joining said extraction wire to the rest of said extraction assembly by soldering said stranded wires to each other and to the rest of said extraction assembly; forming said extraction wire into a desired configuration for use in said medical extraction device; and applying heat to said formed extraction wire to set the shape memory characteristics of said inner monofilament wire of shape memory material.
Claim 13
Dependent Claim
25 words
The improvement in the method for constructing a medical extraction device according to claim 10 in which said stranded wires are made of stainless steel.
Claim 14
Dependent Claim
23 words
The improvement in the method for constructing a medical extraction device according to claim 10 in which said shape memory material is nitinol.
Claim 15
Dependent Claim
25 words
The improvement in the method for constructing a medical extraction device according to claim 11 in which said stranded stainless steel wires includes five wires.
Claim 16
Dependent Claim
25 words
The improvement in the method for constructing a medical extraction device according to claim 11 in which said stranded stainless steel wires includes six wires.
Claim 17
Dependent Claim
23 words
The improvement in the method for constructing a medical extraction device according to claim 13 in which said shape memory material is nitinol.
Claim 18
Dependent Claim
23 words
The improvement in the method for constructing a medical extraction device according to claim 14 in which said shape memory material is nitinol.
Claim 19
Dependent Claim
37 words
The improvement in the method for constructing a medical extraction device according to claim 15 in which said inner wire has a diameter of about 0.005" and said surrounding wires each have a diameter of about 0.0055".
Claim 20
Dependent Claim
37 words
The improvement in the method for constructing a medical extraction device according to claim 16 in which said inner wire has a diameter of about 0.005" and said surrounding wires each have a diameter of about 0.0004".
Claim 21
Dependent Claim
219 words
An improvement in the method for constructing a medical extraction device, said medical extraction device including a retaining cannula and an extraction assembly including a plurality of extraction wires extendable from said retaining cannula into a pre-formed configuration for removing a foreign body from within a patient, the improvement comprising the steps of: constructing a plurality of extraction wires of approximately equal length out of a composite construction which includes an inner monofiliment wire of shape memory material surrounded by a plurality of at least five outer stranded wires stranded together about said inner monofilament wire of shape memory material, said outer stranded wires being made of material which is readily solderable as compared to said shape memory material; joining the ends of said extraction wires by soldering said outer standard wires together at said ends; joining said extraction wires at a set position a set distance from the distal end of said extraction wires by soldering said outer stranded wires together at said set position; forming said extraction wires in the area between said set position and the distal end of said extraction wires into a desired configuration for use in said medical extraction device; and applying heat to said formed extraction wires to set the shape memory characteristics of said inner monofilament wire of shape memory material.
Claim 22
Dependent Claim
219 words
An improvement in the method for constructing a medical extraction device, said medical extraction device including a retaining cannula and an extraction assembly including a plurality of extraction wires extendable from said retaining cannula into a pre-formed configuration for removing a foreign body from within a patient, the improvement comprising the steps of: constructing a plurality of extraction wires of approximately equal length out of a composite construction which includes an inner monofiliment wire of shape memory material surrounded by a plurality of at least five outer stranded wires stranded together about said inner monofilament wire of shape memory material, said outer stranded wires being made of material which is readily solderable as compared to said shape memory material; joining the ends of said extraction wires by soldering said outer standard wires together at said ends; joining said extraction wires at a set position a set distance from the distal end of said extraction wires by soldering said outer stranded wires together at said set position; forming said extraction wires in the area between said set position and the distal end of said extraction wires into a desired configuration for use in said medical extraction device; and applying heat to said formed extraction wires to set the shape memory characteristics of said inner monofilament wire of shape memory material.
Claim 23
Dependent Claim
25 words
The improvement in the method for constructing a medical extraction device according to claim 19 in which said stranded wires are made of stainless steel.
Claim 24
Dependent Claim
25 words
The improvement in the method for constructing a medical extraction device according to claim 20 in which said stranded stainless steel wires includes five wires.
Claim 25
Dependent Claim
25 words
The improvement in the method for constructing a medical extraction device according to claim 20 in which said stranded stainless steel wires includes six wires.
Claim 26
Dependent Claim
23 words
The improvement in the method for constructing a medical extraction device according to claim 19 in which said shape memory material is nitinol.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1997-07-18 | 1998-01-17 | 1998-07-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2001-07-18 | 2002-01-17 | 2002-07-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2005-07-18 | 2006-01-17 | 2006-07-19 | $7700.00 | Window Closed / Lapsed |