Patent
Method and apparatus for position and motion sensing
Dean Andersen,Marc Ryat +1 more
TLDR
In this paper, an apparatus for extracting activity information and position information from a composite signal generated by a motion sensor includes an analog-to-digital converter for converting the composite signal from analog to digital format.Abstract:
An apparatus for extracting activity information and position information from a composite signal generated by a motion sensor includes an analog to digital converter for converting the composite signal from analog to digital format. A wide-band low pass filter having a frequency response of about zero hertz to about ten hertz and a narrow low pass filter having a frequency response of about zero hertz to about 0.5 hertz filter the digitized composite signal. An adder subtracts the output of the narrow-band low pass filter from the output of the wide-band low pass filter. The resulting difference represents information regarding the activity level of the motion sensor, and the output of the narrow-band low pass filter represents information regarding the position of the sensor.read more
Citations
More filters
Patent
Systems and methods for joint replacement
TL;DR: In this paper, a surgical orientation device and orthopedic fixtures can be used to locate the orientation of an axis in the body, adjust an orientation of a cutting plane or planes along a bony surface, to distract a joint, or to assist in an Orthopedic procedure or procedures.
Patent
Methods and apparatuses for detecting medical device acceleration, temperature, and humidity conditions
TL;DR: In this paper, an ambulatory medical device for detecting acceleration, temperature, and/or humidity conditions in or around the medical device is provided, which can alter the operation of the device, provide an alarm or warning to the user, or transmit data about the detected conditions to another device.
Patent
Digital camera with integrated accelerometers
TL;DR: In this article, a digital camera system has integrated accelerometers for determining static and dynamic accelerations of the digital cameral system, which can be used for correcting image data for roll, pitch and vibrations.
Patent
Closed-loop therapy adjustment
Duane Bourget,Keith A. Miesel +1 more
TL;DR: In this article, techniques for detecting a value of a sensed patient parameter, and automatically delivering therapy to a patient according to therapy information previously associated with the detected value, are described.
Patent
Surgical orientation device and method
A. Curt Stone,Joseph F. Russial +1 more
TL;DR: A device for detecting and measuring a change in angular position with respect to a reference plane is used in surgical procedures for orienting various instruments, prosthesis, and implants as mentioned in this paper.
References
More filters
Journal ArticleDOI
An overview of sigma-delta converters
TL;DR: This article describes conventional A/D conversion, as well as its performance modeling, and examines the use of sigma-delta converters to convert narrowband bandpass signals with high resolution.
Patent
Medical service employing multiple DC accelerometers for patient activity and posture sensing and method
TL;DR: In this article, a method of and apparatus for determining the physical posture of a patient's body, having a superior-inferior body axis, an anterior-posterior and a lateral-medial body axis in relation to earth's gravitational field, is presented.
Patent
Leadless implantable sensor assembly and a cardiac emergency warning alarm
TL;DR: A leadless implantable cardiac arrhythmia alarm is disclosed which continuously assesses a patient's heart function to discriminate between normal and abnormal heart functioning and, upon detecting an abnormal condition, generates a patient-warning signal.
Patent
AC/DC multi-axis accelerometer for determining patient activity and body position
Anne Margaret Pianca,Gene A. Bornzin,Euljoon Park,Joseph J. Florio,Alan B. Vogel,Lee Jay Mandell,Junyu Mai +6 more
TL;DR: An implantable cardiac stimulation device which determines stimulation based upon the patient's body position and activity level while eliminating special implantation or calibration procedures was proposed in this paper. But, this method requires the patient to be in a standing position.
Patent
Implantable position and motion sensor
TL;DR: In this article, an implantable medical device for controlling a physiological function includes functional apparatus for controllably duplicating the selected normal physiological function of the patient's body, which is indicative of whether the patient is standing, sitting or reclining.