Margaret E Larson

US Patent:

6776757, Aug 17, 2004

Filed:

Jul 13, 2001

Appl. No.:

09/904683

Inventors:

Margaret J. Larson - Lummi Island WA
John W. Rutter - Bellingham WA
Larry L. Smith - Seattle WA

Assignee:

Sonotech, Inc. - Bellingham WA

International Classification:

A61B 800

US Classification:

600437

Abstract:

A medical ultrasound coupling media and lubricant, in gel or liquid form, comprised of polyethylene oxide (PEO), at least one of polyalkylene glycols and polyhydric alcohols, and the balance water. The inventive coupling media provides long-term biocompatibility (bio-inert, bio-erodable or biodegraded and excreted) in vivo with human tissue and body fluids. The ultrasound coupling and lubricating media is formulated and manufactured in such manner and form that produces higher viscosity gels with decreased amounts of polymer and renders the acoustic media sterile, non-cross-linked, pseudoplastic, and containing acceptably low levels of pyrogens.

US Patent:

6866630, Mar 15, 2005

Filed:

Mar 12, 2001

Appl. No.:

09/804124

Inventors:

Margaret J. Larson - Lummi Island WA, US
John W. Rutter - Bellingham WA, US
Larry L. Smith - Seattle WA, US

Assignee:

Sonotech, Inc. - Bellingham WA

International Classification:

A61B008/00

US Classification:

600437

Abstract:

A medical ultrasound coupling media and lubricant, in gel or liquid form, comprised of polyethylene oxide (PEO), and aqueous solvent solutions. The inventive coupling media provides long term biocompatibility (bio-inert, bio-erodable or biodegraded and excreted) in vivo with human tissue and body fluids. The ultrasound coupling and lubricating media is formulated and manufactured in such manner and form that renders the acoustic media sterile, non-cross-linked, pseudoplastic, and containing acceptably low levels of pyrogens.

US Patent:

20050101854, May 12, 2005

Filed:

Oct 22, 2004

Appl. No.:

10/972103

Inventors:

Eugene Larson - Lummi Island WA, US
Margaret Larson - Lummi Island WA, US

International Classification:

A61B005/05

US Classification:

600407000

Abstract:

An apparatus for delivering a sterilizing dose of ultraviolet wavelength (UV) light to sterilize one or more patient contacting surfaces of a transducer. The dose of ultraviolet light can be delivered to the face and, preferably, also to a portion of the sides of the transducer area, which is the patient contact area, in a short period of time.

US Patent:

60396946, Mar 21, 2000

Filed:

Jun 25, 1998

Appl. No.:

9/104686

Inventors:

Margaret J. Larson - Lummi Island WA
John W. Rutter - Bellingham WA
Larry L. Smith - Seattle WA

Assignee:

Sonotech, Inc. - Bellingham WA

International Classification:

A61B 814

US Classification:

600459

Abstract:

A homogeneous, solid, elastic, biocompatible sheath which is conformal and performs as if integral to the diagnostic and/or therapeutic medical ultrasound transducer, and comprised of 20 to 95% biocompatible liquid, preferably about 70% to about 95% biocompatible liquid, that render properties to the sheath resulting in the desirable level of acoustic coupling, with acceptable low levels of acoustic artifacts, distortion and attenuation and provides a microbial barrier between the transducer and a surgical field or skin. Such sheaths are fabricated from a group of hydrophilic block co-polymers whose chemistry and physical properties provide ability to form products by dipping, casting, molding or extrusion. The device of this invention is a conformal ultrasound acoustic energy coupling and microbial barrier sheath that replaces gel or fluid ultrasound couplants and/or protective latex or synthetic elastomer covers, which require placement of ultrasound coupling fluids or gels between the cover and the transducer as well as between the cover and the body. The invention eliminates biological reactions from latex contact and harmful gel or fluid couplant spills into body orifices, organs, tissue and blood.

US Patent:

63028484, Oct 16, 2001

Filed:

Jul 1, 1999

Appl. No.:

9/346463

Inventors:

Margaret J. Larson - Lummi Island WA
John W. Rutter - Bellingham WA
Larry L. Smith - Seattle WA

Assignee:

Sonotech, Inc. - Bellingham WA

International Classification:

A61B 800

US Classification:

600461

Abstract:

A medical ultrasound coupling media and lubricant, in gel or liquid form, comprised of polyethylene oxide (PEO), and aqueous solvent solutions. The inventive coupling media provides long term biocompatibility (bio-inert, bio-erodable or biodegraded and excreted) in vivo with human tissue and body fluids. The ultrasound coupling and lubricating media is formulated and manufactured in such manner and form that renders the acoustic media sterile, non-cross-linked, pseudoplastic, and containing acceptably low levels of pyrogens.