Patent US4219855A successfully refreshed from Google Patents.
US5163933A
Expired / Lapsed
US
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Prosthetic joint replacement procedure using excimer laser
Assignee: Cedars-Sinai Medical Center
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Filing: 1990-10-22
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Granted: 1992-11-17
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Expires: 2010-10-22
Abstract
Abstract What is disclosed is a method of removing bone cement by use of an excimer laser. This method is useful in prosthetic joint replacement surgery. Ablation of the bone cement by means of the excimer laser allows for prosthetic replacement without tearing or damage to the natural tissue, bone or limb to which the prosthesis is attached. Lasers used have an intensity level of at least 50 kilowatts and wavelengths ranging from 157-400 nm.
Inventors
- 👤 Warren S. Grundfest
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 21:59
CPC Classifications
A; A61; A61B; A61B18/00; A61B18/18; A61B18/20; A61B18/22; A61B18/24; A61B17/00; A61B17/56; A61B17/58; A61B17/88; A61B17/8802; A61B17/8847
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
91 words
A method removing bone cement, comprising the steps of: providing an excimer laser device; providing an arthroscope; inserting the arthroscope into a human body; moving the arthroscope to a position in the human body where bone cement is located; and directing laser radiation from the excimer laser through the arthroscope to the bone cement in a pulsed output of approximately 10 nanoseconds duration and at an intensity level of at least 50 kilowatts; wherein the laser radiation so directed photoablates the bone cement without causing damage to surrounding bone or tissue.
Claim 2
Independent Claim
91 words
A method removing bone cement, comprising the steps of: providing an excimer laser device; providing an arthroscope; inserting the arthroscope into a human body; moving the arthroscope to a position in the human body where bone cement is located; and directing laser radiation from the excimer laser through the arthroscope to the bone cement in a pulsed output of approximately 10 nanoseconds duration and at an intensity level of at least 50 kilowatts; wherein the laser radiation so directed photoablates the bone cement without causing damage to surrounding bone or tissue.
Claim 3
Dependent Claim
16 words
The method of claim 1 wherein the step of providing an arthroscope provides a flexible arthroscope.
Claim 4
Dependent Claim
48 words
The method of claim 2 wherein the steps of inserting the arthroscope into a human body and moving the arthroscope to a position in the human body where bone cement is located includes inserting the flexible arthroscope in the human body to a position adjacent the bone cement.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1995-11-17 | 1996-05-18 | 1996-11-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1999-11-17 | 2000-05-18 | 2000-11-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2003-11-17 | 2004-05-18 | 2004-11-17 | $7700.00 | Window Closed / Lapsed |