Lyle F Weaver

US Patent:

8320981, Nov 27, 2012

Filed:

Jun 29, 2007

Appl. No.:

11/771547

Inventors:

Carl Mayer - Overland Park KS, US
Craig Seyl - Olathe KS, US
Joseph Lee Hollmann - Kansas City MO, US
Eric Weiss - Sunnyvale CA, US
Lyle Frank Weaver - Woodside CA, US
Timothy A. Fayram - Gilroy CA, US

Assignee:

Pacesetter, Inc. - Sunnyvale CA

International Classification:

A61B 5/1455

US Classification:

600310, 600322, 600323, 600326, 600320

Abstract:

An implantable system includes light sources to transmit toward vascularized tissue, in a time multiplexed manner, light having a first wavelength of approximately 660 nm, light having a second wavelength of approximately 810 nm, light having a third wavelength of approximately 910 nm, and light having a fourth wavelength of approximately 980 nm. The system includes one or more light detector to detect light of the first, second, third and fourth wavelengths scattered by vascularized tissue. Additionally, one or more processor is configured to determine levels of blood oxygen saturation based on the detected scattered light of the first and third wavelengths, determine levels of tissue oxygen saturation based on the detected scattered light of the first and third wavelengths, determine levels of hemoglobin concentration based on the detected scattered light of the second wavelength, and determine levels of tissue hydration based on the detected scattered light of the second and fourth wavelengths.

US Patent:

8554333, Oct 8, 2013

Filed:

Jul 24, 2008

Appl. No.:

12/179336

Inventors:

Yongjian Wu - Sunnyvale CA, US
Benjamin T. Persson - Sunnyvale CA, US
Thanh Tieu - Milpitas CA, US
Dorin Panescu - San Jose CA, US
Devanshi Shah - Santa Clara CA, US
Lyle Frank Weaver - Woodside CA, US

Assignee:

Pacesetter, Inc. - Sunnyvale CA

International Classification:

A61N 1/00
H04L 25/06
H04Q 5/22
G08B 1/08

US Classification:

607 60, 607 29, 607 30, 607 31, 607 32, 375317, 340 1033, 34053912

Abstract:

A wireless communication threshold for an implantable medical device is automatically adapted in an attempt to maintain optimum signal detection sensitivity. In some aspects, a threshold level may be adapted to account for current environmental conditions, implant conditions, device conditions, or other conditions that may affect the reception of wireless signals at the device. In some aspects, the determination of an optimum level for the threshold involves a tradeoff relating to effectively detecting target signals while avoiding detection of noise and/or interference. In some aspects, adaptation of a threshold may be based on maximum energy levels associated with one or more sets of RF energy sample data. In some aspects, adaptation of a threshold may be based on the number of false wakeups that occur during a period of time.

US Patent:

20110245888, Oct 6, 2011

Filed:

Apr 5, 2010

Appl. No.:

12/754491

Inventors:

Steven W. Badelt - Granada Hills CA, US
Gabriel A. Mouchawar - Valencia CA, US
George I. Isaac - Port Hueneme CA, US
Neal Forss - East Palo Alto CA, US
Lyle Frank Weaver - Woodside CA, US

Assignee:

PACESETTER, INC. - Sylmar CA

International Classification:

A61N 1/39

US Classification:

607 6

Abstract:

A medical device (implantable or external) is provided that comprises a power source, a charge storage member, a terminal connector, a switch network, a controller and a leak detection module. The charge storage member is configured to receive and store energy from the power source. The terminal connector is configured to be coupled to a lead to be implanted in a patient proximate to tissue of interest. The switch network is electrically disposed between the charge storage member and the terminal connector. The switch network changes between open and closed states to disconnect and connect the charge storage member and the terminal connector. The controller controls storage of energy in the charge storage member and delivery of stimulating pulses from the charge storage member to the lead coupled to the terminal connector. The leak detection module obtains a leakage measurement by sensing at least one of i) a voltage potential of the charge storage member and ii) current flow from the charge storage member. The leak detection module compares the leakage measurement to a leakage threshold to determine when the leakage measurement satisfies the leakage threshold.

US Patent:

7221977, May 22, 2007

Filed:

Jun 25, 2004

Appl. No.:

10/877215

Inventors:

Lyle Weaver - Woodside CA, US
Charles Neder - Mountain View CA, US
Louis Wong - San Jose CA, US

Assignee:

Pacesetter, Inc. - Sunnyvale CA

International Classification:

A61N 1/00

US Classification:

607 29, 607 34, 607 4, 320136

Abstract:

A method and apparatus for measuring battery depletion in an implantable medical device is presented. The apparatus includes first and second switch pairs disposed in series between the battery and a load, and connected in a parallel arrangement with respect to one another. A capacitor is connected in a first polarity between the battery and the load when only first and fourth switches are closed and in a second polarity when only second and third switches are closed. A comparator circuit causes the switches to reverse the capacitor's polarity based on a comparison of the voltage drop across the capacitor to a threshold value. A counter counts the number of times the capacitor reverses polarity, which is proportional to the amount of charge transferred from the battery during its lifetime in the device and indicative of the battery's level of depletion.