US3847157A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Medico-surgical tube
Assignee: Individual
•
Filing: 1973-06-18
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Granted: 1974-11-12
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Expires: 1993-06-18
Abstract
Abstract A tube structure is disclosed, for use within living tissue, incorporating a magnetic element whereby the location and length of the tube within tissue may be readily detected. In one disclosed form, the tube is seamless, flexible and is formed of non-fibrous imperforate material containing ferromagnetic material for magnetic detection. In the forms as disclosed, the ferromagnetic material comprises an integral metal strip, particulate or segments of material extending along the length of the tube. A separate grounding strip may also be included in a tube as disclosed, that is radio-opaque for X-ray detection. The tube generally is tapered to define a distal end. A magnetic detector for sensing the tube is also disclosed utilizing a movably supported gapped magnetic toroid.
Inventors
- 👤 J Caillouette
- 👤 P Johnson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 21:02
CPC Classifications
A; A61; A61M; A61M25/00; A61M25/01; A61M25/0105; A61M25/0127; A61B; A61B34/00; A61B34/70; A61B34/73; A61B5/00; A61B5/06; A61B5/061; A61B5/062; A61M25/0108; A61M16/00; A61M16/04; A61M16/0402; A61M16/0411; A61M16/0488; A61M2205/00; A61M2205/02; A61M2205/0233; A61M2205/32
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
78 words
An externally detectable tube structure for use within living tissue, as to establish an access passage comprising: a seamless elongated tube comprising an integral wall of flexible non-fibrous imperforate material for insertion into living tissue; and a quantity of ferromagnetic material disposed within said wall along a substantial length of said tube for magnetic detection at an external location in relation to said living tissue, said material being flexible in said tube, to accommodate flexibility of said tube.
Claim 2
Dependent Claim
78 words
An externally detectable tube structure for use within living tissue, as to establish an access passage comprising: a seamless elongated tube comprising an integral wall of flexible non-fibrous imperforate material for insertion into living tissue; and a quantity of ferromagnetic material disposed within said wall along a substantial length of said tube for magnetic detection at an external location in relation to said living tissue, said material being flexible in said tube, to accommodate flexibility of said tube.
Claim 3
Dependent Claim
33 words
A tube structure according to claim 1 wherein said ferromagnetic material is magnetized by domains of a dominant sense of magnetism along the entire substantial length thereof and aligned with said elongated tube.
Claim 4
Dependent Claim
24 words
A tube structure according to claim 1 wherein said ferromagnetic material comprises a continuous strip that extends substantially the full length of said tube.
Claim 5
Dependent Claim
33 words
A tube structure according to claim 3 wherein said ferromagnetic material is magnetized by domains of a dominant sense of magnetism and wherein said dominant sense of magnetism aligns to the elongate tube.
Claim 6
Dependent Claim
21 words
A tube structure according to claim 1 wherein said ferromagnetic material comprises separate spaced-apart segments of particulate material defining a strip.
Claim 7
Dependent Claim
30 words
A tube structure according to claim 5 wherein said tube material is transparent and said ferromagnetic material is confined to a defined radial segment in the wall of said tube.
Claim 8
Dependent Claim
23 words
A tube structure according to claim 1 wherein said ferromagnetic material comprises an integral wire extending along the elongated dimension of said tube.
Claim 9
Dependent Claim
41 words
A tube structure according to claim 1 wherein said tube material is transparent and further includes an electrically conductive strip extending substantially the full length of said tube and from the interior to the exterior of the wall of said tube.
Claim 10
Dependent Claim
23 words
A tube structure according to claim 1 wherein one end of said tube is of reduced cross section to define a distal end.
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) | 1977-11-11 | 1978-05-13 | 1978-11-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-11-11 | 1982-05-13 | 1982-11-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-11-11 | 1986-05-13 | 1986-11-12 | $7700.00 | Window Closed / Lapsed |