Patent US5520650A successfully refreshed from Google Patents.
US5520650A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Self-arresting overpenetration-proof cannula device for body cavities
Assignee: Individual
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Filing: 1994-08-25
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Granted: 1996-05-28
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Expires: 2014-08-25
Abstract
Abstract A self-arrest overpenetration-proof cannula device for the safe insertion of a cannula or a needle with or without a catheter concentric to it into any body cavity or anatomical hollow structure having a wall, said body cavity or hollow structure being either naturally present or pathologically formed, being fluid, air or gas filled. The device has the intrinsic ability of automatically arresting the advancement of a needle or cannula instantly upon occurred body cavity penetration by the tip of said needle or cannula. The device is capable of recognizing penetration of a body cavity by means of a dropping of a vacuum pressure present in the device prior to body cavity penetration, said dropping of vacuum pressure occurring upon body cavity penetration of the needle tip, and is able to automatically respond to said drop of vacuum pressure by arresting the advancement of the needle or cannula.
Inventors
- 👤 Filiberto Zadini
- 👤 Giorgio Zadini
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 14:46
CPC Classifications
A; A61; A61M; A61M25/00; A61M25/01; A61M25/06; A61M25/0612; A61B; A61B17/00; A61B17/34; A61B17/3401; A61B17/3415; A61B17/3472; A61B17/3494; A61B17/3496; A61B90/00; A61B90/03; A61B2090/033; A61B2090/036; A61B5/00; A61B5/48; A61B5/4887; A61B5/4896; A61M5/00; A61M5/178; A61M5/31; A61M5/32; A61M5/3205; A61M5/321; A61M5/3243; A61M5/3269
Claims Analysis
Total Claims: 18
Claim 1
Independent Claim
73 words
A body cavity access device for insertion of a cannula into a body cavity, comprising: a cannula, vacuum means to house a vacuum pressure, said vacuum means being in communication with said cannula, means for arresting an advancement of said cannula through body tissues overlying said body cavity, said arresting means being automatically actuable in response to a change of said vacuum pressure occurring upon penetration of said body cavity by said cannula.
Claim 2
Dependent Claim
73 words
A body cavity access device for insertion of a cannula into a body cavity, comprising: a cannula, vacuum means to house a vacuum pressure, said vacuum means being in communication with said cannula, means for arresting an advancement of said cannula through body tissues overlying said body cavity, said arresting means being automatically actuable in response to a change of said vacuum pressure occurring upon penetration of said body cavity by said cannula.
Claim 3
Dependent Claim
27 words
The device of claim 1 wherein said change of a vacuum pressure within said vacuum means includes a reduction of said vacuum pressure within said vacuum means.
Claim 4
Dependent Claim
27 words
The device of claim 1 wherein said change of a vacuum pressure within said vacuum means includes a vanishing of said vacuum pressure within said vacuum means.
Claim 5
Dependent Claim
31 words
The device of claim 1, further comprising: a catheter concentric to said cannula, said catheter being manually advanceable into said body cavity upon penetration of said body cavity by said cannula.
Claim 6
Dependent Claim
31 words
The device of claim 1, further comprising: a catheter concentric to said cannula, said catheter being automatically advanceable into said body cavity upon penetration of said body cavity by said cannula.
Claim 7
Dependent Claim
82 words
A body cavity access device for placement of a cannula into a body cavity, comprising: a cannula, means for accelerating backflow of content of said body cavity, said accelerating means being in flow communication with said cannula, said backflow occurring upon penetration of said body cavity by said cannula, means for arresting an advancement of said cannula through body tissues overlying said body cavity, said arresting means being automatically actuable in response to said accelerated backflow of content of said body cavity.
Claim 8
Dependent Claim
82 words
A body cavity access device for placement of a cannula into a body cavity, comprising: a cannula, means for accelerating backflow of content of said body cavity, said accelerating means being in flow communication with said cannula, said backflow occurring upon penetration of said body cavity by said cannula, means for arresting an advancement of said cannula through body tissues overlying said body cavity, said arresting means being automatically actuable in response to said accelerated backflow of content of said body cavity.
Claim 9
Dependent Claim
114 words
A body cavity access device for insertion of a catheter into a body cavity, comprising: a catheter, a hollow needle having a tip, said catheter being concentric with said hollow needle, said hollow needle being advanceable toward a body cavity, vacuum means to house a vacuum pressure, said vacuum means being in communication with said hollow needle, means for arresting an advancement of said needle through body tissues overlaying said body cavity, said arresting means being automatically actuable in response to a change of said vacuum pressure occurring upon penetration of said body cavity by said needle tip, said catheter being advanceable into said body cavity upon needle tip penetration of said body cavity.
Claim 10
Dependent Claim
114 words
A body cavity access device for insertion of a catheter into a body cavity, comprising: a catheter, a hollow needle having a tip, said catheter being concentric with said hollow needle, said hollow needle being advanceable toward a body cavity, vacuum means to house a vacuum pressure, said vacuum means being in communication with said hollow needle, means for arresting an advancement of said needle through body tissues overlaying said body cavity, said arresting means being automatically actuable in response to a change of said vacuum pressure occurring upon penetration of said body cavity by said needle tip, said catheter being advanceable into said body cavity upon needle tip penetration of said body cavity.
Claim 11
Dependent Claim
26 words
The device of claim 7 wherein said catheter is automatically advanced to an advanced position relative to said needle upon body cavity penetration of said needle.
Claim 12
Dependent Claim
26 words
The device of claim 8 wherein said catheter is manually advanced to an advanced position relative to said needle upon body cavity penetration of said needle.
Claim 13
Dependent Claim
122 words
A body cavity access device for placement of a catheter into a body cavity comprising: a catheter, a hollow needle having a tip, said catheter being concentric with said hollow needle, said needle being advanceable toward a body cavity, means for accelerating backflow of content of said body cavity, said accelerating means being in flow communication with said hollow needle, said backflow occurring upon penetration of said body cavity by said needle tip, means for arresting an advancement of said needle through body tissues overlying said body cavity, said arresting means being automatically actuable in response to said accelerated backflow of content of said body cavity, said catheter being advanceable into said body cavity upon needle tip penetration of said body cavity.
Claim 14
Dependent Claim
122 words
A body cavity access device for placement of a catheter into a body cavity comprising: a catheter, a hollow needle having a tip, said catheter being concentric with said hollow needle, said needle being advanceable toward a body cavity, means for accelerating backflow of content of said body cavity, said accelerating means being in flow communication with said hollow needle, said backflow occurring upon penetration of said body cavity by said needle tip, means for arresting an advancement of said needle through body tissues overlying said body cavity, said arresting means being automatically actuable in response to said accelerated backflow of content of said body cavity, said catheter being advanceable into said body cavity upon needle tip penetration of said body cavity.
Claim 15
Dependent Claim
86 words
A body cavity access device for placement of a catheter into a body cavity, comprising: a catheter, a hollow needle having a tip, said catheter being concentric with said hollow needle, said needle being advanceable toward a body cavity, means for arresting an advancement of said needle through body tissues overlaying a body cavity, said arresting means being automatically actuated upon penetration of said body cavity by said needle tip, said catheter being advanceable into said body cavity upon needle tip penetration of said body cavity.
Claim 16
Dependent Claim
86 words
A body cavity access device for placement of a catheter into a body cavity, comprising: a catheter, a hollow needle having a tip, said catheter being concentric with said hollow needle, said needle being advanceable toward a body cavity, means for arresting an advancement of said needle through body tissues overlaying a body cavity, said arresting means being automatically actuated upon penetration of said body cavity by said needle tip, said catheter being advanceable into said body cavity upon needle tip penetration of said body cavity.
Claim 17
Dependent Claim
84 words
A body cavity access device for placement of a catheter into a body cavity, comprising: a catheter, a hollow needle having a tip, said catheter being concentric with said needle, said needle being advanceable toward a body cavity, means for preventing overpenetration of said body cavity by said hollow needle, said means for preventing overpenetration being automatically actuated upon penetration of said body cavity by said needle tip, said catheter being advanceable into said body cavity upon needle tip penetration of said body cavity.
Claim 18
Dependent Claim
84 words
A body cavity access device for placement of a catheter into a body cavity, comprising: a catheter, a hollow needle having a tip, said catheter being concentric with said needle, said needle being advanceable toward a body cavity, means for preventing overpenetration of said body cavity by said hollow needle, said means for preventing overpenetration being automatically actuated upon penetration of said body cavity by said needle tip, said catheter being advanceable into said body cavity upon needle tip penetration of said body cavity.
References Cited (Backward Citations)
US2047010A
Cited
DE1022758B
Cited
SU133559A1
Cited
US3530785A
Cited
US4269192A
Cited
GB2071499A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1999-05-28 | 1999-11-27 | 2000-05-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2003-05-28 | 2003-11-27 | 2004-05-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2007-05-28 | 2007-11-27 | 2008-05-28 | $7700.00 | Window Closed / Lapsed |