Patent US4878725A successfully refreshed from Google Patents.
US4878725A
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US
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Apparatus for the circumferential irradiation of objects
Assignee: Dornier Medizintechnik GmbH
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Filing: 1988-05-24
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Granted: 1989-11-07
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Expires: 2008-05-24
Abstract
Abstract For the circumferential irradiation of objects, especially of vessels, hollow organs and solid tissue, by optical radiation of high intensity which is conducted via a flexible optical fiber, the optical radiation is coupled into the optical fiber at a predetermined angle (β 1 ,β 2 ) to the surface normal of the end face of the optical fiber such that it leaves the distant end of the optical fiber in the form of a conical surface.
Inventors
- 👤 Stefan Hessel
- 👤 Thomas Ischinger
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 14:00
CPC Classifications
A; A61; A61B; A61B18/00; A61B18/18; A61B18/20; A61B18/22; A61B18/24; A61B18/245; A61B18/28; A61N; A61N5/00; A61N5/06; A61N5/0601; G; G02; G02B; G02B6/00; G02B6/24; G02B6/42; G02B6/4201; G02B6/4204; G02B6/4206; G02B6/4296; A61B17/00; A61B17/22; A61B2017/22051; A61B2017/22057; A61B2017/22059; A61B2018/2255; A61B2018/2261; A61B90/00; A61B90/39; A61M; A61M25/00; A61M25/10; A61M25/104
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
170 words
Apparatus for the circumferential irradiation of objects, especially of vessels, hollow organs and solid tissue by high-intensity optical radiation which is conducted to the irradiation site by a flexible optical fiber having a near end and a distant end, wherein the optical radiation comprises two marginal rays in a cross section defining an illuminated line, the radiation being coupled into an end face of the near end of the optical fiber at a predetermined angle (β 1 , β 2 ) to the surface normal of the end face of the optical fiber such that the optical radiation emanates at the distant end of the optical fiber in the form of a conical surface, said predetermined angle β 1 comprising the angle of a first of said marginal rays with respect to the surface normal and said predetermined angle β 2 comprising the angle of a second of said marginal rays with respect to the surface normal, said predetermined angles β 1 and β 2 each being greater than 0°.
Claim 2
Dependent Claim
170 words
Apparatus for the circumferential irradiation of objects, especially of vessels, hollow organs and solid tissue by high-intensity optical radiation which is conducted to the irradiation site by a flexible optical fiber having a near end and a distant end, wherein the optical radiation comprises two marginal rays in a cross section defining an illuminated line, the radiation being coupled into an end face of the near end of the optical fiber at a predetermined angle (β 1 , β 2 ) to the surface normal of the end face of the optical fiber such that the optical radiation emanates at the distant end of the optical fiber in the form of a conical surface, said predetermined angle β 1 comprising the angle of a first of said marginal rays with respect to the surface normal and said predetermined angle β 2 comprising the angle of a second of said marginal rays with respect to the surface normal, said predetermined angles β 1 and β 2 each being greater than 0°.
Claim 3
Dependent Claim
44 words
The apparatus recited in claim 1, wherein the end face at the near end of the optical fiber is ground at an angle (ε) from the fiber axis, and the coupling of the optical radiation takes place in the direction of the fiber axis.
Claim 4
Dependent Claim
67 words
The apparatus recited in claim 1 where the emaanating radiation has an aperture angle (δ) and for increasing the aperture angle of the emanating radiation cone surface, means are provided for generating around the distant end of the optical fiber a boundary surface of two transparent media with different coefficients of refraction (n 2 , n 1 ) which the conical radiation surface strikes at an angle.
Claim 5
Dependent Claim
44 words
The apparatus recited in claim 1, wherein the distant end of the optical fiber comprises a substantially cylindrical cap with a transparent cylinder wall, a hollow space being provided between the cap and the end face of the distant end of the optical fiber.
Claim 6
Dependent Claim
16 words
The apparatus recited in claim 4, wherein the hollow space is filled with a gaseous medium.
Claim 7
Dependent Claim
23 words
The apparatus recited in claim 4, wherein the cap is extended by a hose up to the near end of the optical fiber.
Claim 8
Dependent Claim
64 words
The apparatus recited in claim 1, wherein the distant end of the optical fiber is arranged in a central cavity of a balloon catheter closed at the distance end which catheter comprises, in the vicinity of the balloon, a transparent material, and wherein the central cavity of the catheter and a cavity of the balloon are filled with transparent media of optically different density.
Claim 9
Dependent Claim
19 words
The apparatus recited in claim 4, wherein the cap has a mirror surface on a part of its circumference.
Claim 10
Dependent Claim
22 words
The apparatus recited in claim 4, wherein the cap is extended at the distant end by a wire tip impervious to X-rays.
Claim 11
Dependent Claim
18 words
The apparatus recited in claim 4, wherein at least one X-ray impervious marking is provided on the cap.
Claim 12
Dependent Claim
19 words
The appratus recited in claim 7, wherein at least one X-ray impervious marking is provided on the balloon catheter.
References Cited (Backward Citations)
US4681093A
Cited
US4747660A
Cited
US4676231A
Cited
US4693556A
Cited
US4762385A
Cited
US4792692A
Cited
US4760840A
Cited
US4784133A
Cited
US4795430A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1992-11-06 | 1993-05-08 | 1993-11-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1996-11-06 | 1997-05-08 | 1997-11-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2000-11-06 | 2001-05-08 | 2001-11-07 | $7700.00 | Window Closed / Lapsed |