Michael G Dumont

US Patent:

6586751, Jul 1, 2003

Filed:

Apr 30, 1999

Appl. No.:

09/303054

Inventors:

Dean M. Pichon - Arlington MA
Michael G. Dumont - Hampton NH
J. Jeffrey Kablik - Tyngsboro MA

Assignee:

Focal, Inc. - Lexington MA

International Classification:

G01N 2300

US Classification:

2504741, 2504731

Abstract:

A device for testing the light power output of an optical system comprises a thermochromic element, a body element optionally providing collimation or other means of reproducible positioning, and optionally filters and attenuation. A preferred device fits onto the end of an optical power delivery system, and the thermochromic element changes color if the system output is above a defined threshold. An alternative device provides a flat target with a The device may be adapted to be sterilizable, and may be disposable. Optional means for ensuring that the light delivery system is operational during the measurement are provided.

US Patent:

20060122619, Jun 8, 2006

Filed:

Dec 3, 2004

Appl. No.:

11/004592

Inventors:

Joseph Kablik - Tyngsborough MA, US
Michael Dumont - Hampton NH, US

International Classification:

A61B 17/58
A61F 2/38

US Classification:

606088000

Abstract:

Disposable, self-contained, hand-held, low power devices for irradiating or illuminating a light sensitive material, such as a sealant, hydrogel, and the like, that has been applied to soft, living mammalian tissue and systems and methods using the devices are disclosed. Preferably, the light sources are low power light emitting diodes that provide a desired power density for a predetermined period of time that are controlled by a control board that limits the current and the time of application of the activating energy. The illumination or irradiation causes the light sensitive material to cure, polymerize, bond, and/or cross-link with the tissue to provide a suitable, sealant (modulus) strength.

US Patent:

57796734, Jul 14, 1998

Filed:

Jun 26, 1995

Appl. No.:

8/494333

Inventors:

Laurence A. Roth - Windham NH
Stephen J. Herman - Andover MA
Farhad Khosravi - San Mateo CA
David Melanson - Hudson NH
Michael Dumont - Stratham NH
Patrick K. Campbell - Georgetown MA
John C. Spiridigliozzi - Dedham MA

Assignee:

Focal, Inc. - Lexington MA

International Classification:

A61M 2500

US Classification:

604101

Abstract:

Devices for providing polymeric layers on the interior surface of body lumens and spaces are disclosed. The devices can include proximal and distal occlusion elements to define the treatment space and an optical emitter to provide light for a photopolymerization procedure. The devices may include a molding member for providing a thick polymeric gel. Alternatively, devices without a molding member may be used to carry out an interfacial polymerization procedure.

US Patent:

56650639, Sep 9, 1997

Filed:

Jun 24, 1994

Appl. No.:

8/265448

Inventors:

Laurence A. Roth - Windham NH
Stephen J. Herman - Andover MA
Farhad Khosravi - Newton MA
David Melanson - Chelmsford MA
Michael Dumont - Stratham NH

Assignee:

Focal, Inc. - Lexington MA

International Classification:

A61M 2500

US Classification:

604 53

Abstract:

Devices for providing polymeric layers on the interior surface of body lumens and spaces are disclosed. The devices can include proximal and distal occlusion elements to define the treatment space and an optical emitter to provide light for a photopolymerization procedure. The devices may include a molding member for providing a thick polymeric gel. Alternatively, devices without a molding member may be used to carry out an interfacial polymerization procedure.

US Patent:

60043156, Dec 21, 1999

Filed:

Sep 16, 1996

Appl. No.:

8/714189

Inventors:

Michael G. Dumont - Hampton NH

Assignee:

Focal, Inc. - Lexington MA

International Classification:

A61B 1736

US Classification:

606 15

Abstract:

An optical fiber device includes a polymeric optical fiber having a proximal end for coupling to a source of light, and a diffusing region. The polymeric optical fiber includes a core and a cladding around the core. The diffusing region includes a length of the polymeric optical fiber in which the cladding is partially removed to expose the core and in which the exposed core and the remaining cladding have a roughened surface for outwardly diffusing light carried through the polymeric optical fiber. The diffusing region is preferably formed by abrasion, for example by directing a particle jet at the optical fiber while rotating and translating the optical fiber with respect to the particle jet. The particle jet may include microscopic glass beads which roughen the optical fiber core. The density of scattering sites may be varied along the length of the diffusing region to produce a desired light output pattern.

US Patent:

52755940, Jan 4, 1994

Filed:

Nov 9, 1990

Appl. No.:

7/611994

Inventors:

Glenn S. Baker - Los Angeles CA
Michael G. Dumont - Stratham NH
Michael Madden - Ashby MA
Norman E. Farr - North Andover MA

Assignee:

C. R. Bard, Inc. - Murray Hill NJ

International Classification:

A61N 506

US Classification:

606 12

Abstract:

An angioplasty system and method for identification and laser ablation of atherosclerotic plaque at a target site in a blood vessel includes fluorescence analysis for identification of noncalcified plaque and calcium photoemission analysis for identification of calcified plaque. Calcified plaque is identified by time domain analysis of calcium photoemission. A high energy pulsed ultraviolet laser can be used for stimulation of fluorescence and for stimulation of calcium photoemission. The system is capable of distinguishing between calcium photoemission and a defective condition of optical fibers that are used to deliver laser energy to the target site. In an another embodiment of the angioplasty system, calcium photoemission is identified during a nonablative initial portion of the laser ablation pulse. When calcium photoemission is not identified, the laser ablation pulse is terminated during the initial nonablative portion thereof.