Patent
Noninvasive continuous cardiac output monitor
Reads0
Chats0
TLDR
In this paper, the pulsatile thoracic impedance signal is processed to produce signals indicative of the ventricular ejection time and the maximum rate of change of pulsatile impedance which are used in a microprocessor to calculate the volume of blood pumped per stroke according to an improved systolic upstroke equation.Abstract:
The invention provides apparatus and methods for using the electrical bioimpedance measurements to monitor parameters associated with blood flow in a segment of body tissue. The invention eliminates the effect of respiration from the thoracic impedance as a function of time to provide a signal indicative of pulsatile thoracic impedance changes continuously. The pulsatile thoracic impedance signal is processed to produce signals indicative of the ventricular ejection time and the maximum rate of change of pulsatile thoracic impedance which are used in a microprocessor to calculate the volume of blood pumped per stroke according to an improved systolic upstroke equation.read more
Citations
More filters
Patent
Adherent device with multiple physiological sensors
Mark J. Bly,Badri Amurthur,Kristofer J. James,Imad Libbus,Yatheendhar D. Manicka,Scott T. Mazar,Jerry S. Wang +6 more
TL;DR: In this paper, an adherent device to monitor a patient for an extended period comprises a breathable tape, a porous material with an adhesive coating to adhere the tape to a skin of the patient.
Patent
Subcutaneous only implantable cardioverter-defibrillator and optional pacer
Gust H. Bardy,Riccardo Cappato +1 more
TL;DR: In this paper, a subcutaneous implantable cardioverter-defibrillator is described, which has an electrically active canister which houses a source of electrical energy, a capacitor, and operational circuitry that senses the presence of potentially fatal heart rhythms.
Patent
Impedance monitor for discerning edema through evaluation of respiratory rate
TL;DR: An impedance monitor for discerning edema through evaluation of respiratory rate is presented in this paper, which includes edema monitor and trigger to initiate diagnostic reporting or corrective action when activated.
Patent
Impedance monitor for discerning edema through evaluation of respiratory rate
TL;DR: An impedance monitor for discerning edema through evaluation of respiratory rate is presented in this article, which includes edema monitor and trigger to initiate diagnostic reporting or corrective action when activated.
Patent
Implantable medical device for measuring time varying physiologic conditions especially edema and for responding thereto
William J. Combs,Catherine R. Condie,Roy Martin,Dwight H. Warkentin,John D. Wahlstrand,David L. Thompson,Li Wang +6 more
TL;DR: An impedance monitor for discerning edema through evaluation of respiratory rate is described in this article, which includes edema monitor and trigger to initiate diagnostic reporting or corrective action when activated Recording of Long Term Average and Short Term Average values for secondary edema measure based on DC signal level are described as are methods and apparatus for removing unwanted recurring noise
References
More filters
Patent
System for determining characteristics of blood flow
TL;DR: In this article, a method and apparatus for determination and display of hemodynamic characteristic values of a patient in a variety of statistical forms and in relative or absolute terms, the measurement determination being made by non-invasive impedance plethysmography under control of a central processor.
Patent
Impedance measuring system
TL;DR: In this article, a constant magnitude alternating current source is connected to at least one electrical impedance to be measured, and a computer is attached to the first and second voltage detectors for processing the measured voltage to compute desired characteristics of the electrical impedance.
Patent
Impedance plethysmography method and apparatus
TL;DR: In this paper, a system using an impedance plethysmograph to measure the impedance of a body section, and circuitry having the impedance signal as an input for developing an output signal proportional to the volume rate of blood flow was presented.
Patent
Flow rate computer adjunct for use with an impedance plethysmograph and method
TL;DR: In this article, a computer adjunct is used in combination with an impedance plethysmograph to measure the level of the artifact signals once each heart pumping cycle and generate a correction signal related thereto.
Patent
Impedance plethysmograph and flow rate computer adjunct and method for use therewith
TL;DR: In this paper, a computer adjunct for use with an impedance plethysmograph which provides signals related to impedance in a biological segment is presented, and an adjustable amplifier is provided within the computer for interposing a signal having a predetermined value for providing normalized signal related to flow rate per volumetric unit of the biological segment.