Patent WO1998024372A1 successfully refreshed from Google Patents.
US5662673A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Surgical trocar and method for placing a trocar sleeve in a body wall
Assignee: Individual
•
Filing: 1995-04-05
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Granted: 1997-09-02
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Expires: 2015-04-05
Abstract
Abstract A safety incising instrument for helically incising a pathway through a body wall at a controlled rate without exerting longitudinal forces on the instrument. The instrument incorporates a helix assembly with a helically-protruding edge made of two cooperating elements: a tapered blade element with a sharp helical blade edge and a resilient shield element with a dull helical edge. The blade and shield elements mate along helical interfaces and jointly define the helically-protruding edge. A periphery of the helix is transformable between an incising position in which the sharp blade edge is exposed and a non-incising position in which the sharp blade edge is not exposed. The shield element is made of resilient material and tissue counterforce or drag on the shield causes the helix to transform to the incising position to incise a pathway in the body wall. Upon penetration of the body wall, the reduction in tissue counterforce on the resilient shield causes the helically-protruding edge to transform to a dull edge thus protecting organs within an anatomic cavity from contact with any sharp blade edge.
Inventors
- 👤 Maciej J. Kieturakis
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 03:52
CPC Classifications
A; A61; A61B; A61B17/00; A61B17/34; A61B17/3417; A61B17/3494; A61B17/3496; A61B2017/00681; A61B2017/00685; A61B2017/3454; A61B2017/3458; A61B2017/348; A61B2017/3482; A61B2017/349
Claims Analysis
Total Claims: 17
Claim 1
Independent Claim
102 words
An incising assembly for an incising end of a surgical instrument, comprising: an incising assembly having first and second elements mating along helical interfaces and being at least partly moveable relative to one another along said interfaces, thereby transforming said assembly between an incising position providing at least a distal portion of said assembly in a sharp configuration capable of incising tissues and a non-incising position providing said at least distal portion in a dull configuration not capable of incising tissue; and a spring structure coupled to said incising assembly, thereby urging said assembly toward said non-incising position from said incising position.
Claim 2
Dependent Claim
102 words
An incising assembly for an incising end of a surgical instrument, comprising: an incising assembly having first and second elements mating along helical interfaces and being at least partly moveable relative to one another along said interfaces, thereby transforming said assembly between an incising position providing at least a distal portion of said assembly in a sharp configuration capable of incising tissues and a non-incising position providing said at least distal portion in a dull configuration not capable of incising tissue; and a spring structure coupled to said incising assembly, thereby urging said assembly toward said non-incising position from said incising position.
Claim 3
Dependent Claim
32 words
The incising assembly of claim 1, wherein said second element is in part compressible radially inwardly along said interfaces, thereby to transform said assembly to said incising position from said non-incising position.
Claim 4
Dependent Claim
34 words
The incising assembly of claim 1, wherein said incising assembly transforms to said incising position from said non-incising position in response to a counterforce being applied to a distal portion of said second element.
Claim 5
Dependent Claim
14 words
The incising assembly of claim 3, wherein said counterforce is at least partly axial.
Claim 6
Dependent Claim
14 words
The incising assembly of claim 3, wherein said counterforce is at least partly rotational.
Claim 7
Dependent Claim
14 words
The incising assembly of claim 3, wherein said counterforce is caused by anatomic tissue.
Claim 8
Dependent Claim
23 words
The incising assembly of claim 1, wherein said spring structure is of a resilient material and is a portion of said second element.
Claim 9
Dependent Claim
20 words
The incising assembly of claim 1, wherein said spring structure is a spring urging said second element distally and helically.
Claim 10
Dependent Claim
52 words
The incising assembly of claim 1, wherein said second element is of resilient material having a first outer periphery in a response state and having a second outer periphery in a suspense state, said second outer periphery being at least partly radially inward of said first outer periphery in said incising position.
Claim 11
Dependent Claim
69 words
The incising assembly of claim 1, wherein said second element is of resilient material having a first outer periphery in a repose state and having a second outer periphery in a suspense state, a proximal portion of said second outer periphery being radially inward of said first periphery and a distal portion of said second outer periphery being radially outward of said first outer periphery in said incising position.
Claim 12
Dependent Claim
51 words
The incising assembly of claim 1, wherein said second element is of resilient material having a first outer periphery in a repose state and having a second outer periphery in a suspense state, said second outer periphery being radially outward of a periphery of said first element in said non-incising position.
Claim 13
Dependent Claim
17 words
The incising assembly of claim 1, wherein said first element is at least partly of transparent material.
Claim 14
Dependent Claim
17 words
The incising assembly of claim 1, wherein said second element is at least partly of transparent material.
Claim 15
Dependent Claim
14 words
The instrument of claim 1, further including a cannula removably mounted around said instrument.
Claim 16
Dependent Claim
199 words
An incising assembly for an incising end of a trocar-type instrument, comprising: an incising assembly comprising first and second elements mating along helical interfaces and defining a helically-protruding edge for threadably engaging an anatomic structure and movable relative to one another along said interfaces, thereby transforming said assembly between an incising position and a non-incising position, said incising position providing at least a distal portion of said edge in a sharp configuration capable of incising tissue, said non-incising position providing said at least distal portion of said edge in a dull configuration not capable of incising tissue; a spring structure urging said assembly toward said non-incising position from said incising position; a probe element with a distal tip and mating along said helical interfaces of said first and second elements and moveable between a projected position and a retracted position, in said projected position said distal tip being distal of distal ends of said first and second elements, in said retracted position said distal tip being proximal of said distal ends of said first and second elements; and a probe spring coupled to said probe element, thereby urging said probe element toward said projected position from said retracted position.
Claim 17
Dependent Claim
199 words
An incising assembly for an incising end of a trocar-type instrument, comprising: an incising assembly comprising first and second elements mating along helical interfaces and defining a helically-protruding edge for threadably engaging an anatomic structure and movable relative to one another along said interfaces, thereby transforming said assembly between an incising position and a non-incising position, said incising position providing at least a distal portion of said edge in a sharp configuration capable of incising tissue, said non-incising position providing said at least distal portion of said edge in a dull configuration not capable of incising tissue; a spring structure urging said assembly toward said non-incising position from said incising position; a probe element with a distal tip and mating along said helical interfaces of said first and second elements and moveable between a projected position and a retracted position, in said projected position said distal tip being distal of distal ends of said first and second elements, in said retracted position said distal tip being proximal of said distal ends of said first and second elements; and a probe spring coupled to said probe element, thereby urging said probe element toward said projected position from said retracted position.
References Cited (Backward Citations)
US936379A
Cited
US3096962A
Cited
US4191191A
Cited
US4535773A
Cited
US4601710B1
Cited
US4601710A
Cited
EP0149431A2
Cited
US4654030A
Cited
US4836205A
Cited
US4867404A
Cited
US5224952A
Cited
US4881537A
Cited
US5431655A
Cited
US5201325A
Cited
US5232451A
Cited
US5147376A
Cited
US5116353A
Cited
US5116353B1
Cited
US5271380A
Cited
US5147316A
Cited
US5368598A
Cited
US5334185A
Cited
US5209736A
Cited
US5203773A
Cited
US5312357A
Cited
US5226890A
Cited
WO1993020866A1
Cited
US5258003A
Cited
US5284130A
Cited
US5279567A
Cited
US5246425A
Cited
US5346504A
Cited
US5370109A
Cited
US5348541A
Cited
WO1994027513A1
Cited
US5336237A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 2000-09-01 | 2001-03-03 | 2001-09-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2004-09-01 | 2005-03-03 | 2005-09-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2008-09-01 | 2009-03-03 | 2009-09-02 | $7700.00 | Window Closed / Lapsed |