Technique for determining signal quality in a physiologic sensing system using high frequency sampling
First Claim
Patent Images
1. A heart monitor comprising:
- an electric signal acquisition and processing stage;
two implantable electrodes configured to pick up myocardial electric signals;
said electric signal acquisition and processing stage connected or being connectable to the two implantable electrodes;
said electric signal acquisition and processing stage comprising a first channel and a second channel that are utilized as signal processing channels;
said first channel comprisinga first sampling stage configured to sample picked-up myocardial electric signals at a first sampling rate, said first channel configured to process the picked-up myocardial electric signals and generate an electrogram signal;
said second channel comprisinga high frequency sampling stage configured to sample at least portions of said picked-up myocardial electric signals at a second sampling rate to detect noise, wherein said second sampling rate is higher than said first sampling rate and wherein said sample picked-up myocardial electric signals at said first sampling rate and said sample at least portions of said picked-up myocardial electric signals at said second sampling rate occur in parallel to effectively sample each of said picked-up myocardial electric signals at a plurality of different time intervals;
a differential stage configured to generate a high frequency sampled output signal that represents a difference between two consecutive high frequency sampled myocardial electric signal values; and
,a comparator that is configured to compare said high frequency sampled output signal with a threshold and to generate a noise detection indicator whenever said threshold is exceeded.
2 Assignments
0 Petitions
Accused Products
Abstract
A medical device for processing physiological signals such as electrocardiograms. The processing includes: sampling a physiologic signal in a first channel with a first sampling rate, simultaneously sampling the physiologic signal in a second channel with a higher sampling rate to thus generate pairs of sampling values, forming the difference between two sampling values of each pair, comparing said difference with a threshold, and generating a noise detection indicator whenever said threshold is exceeded.
4 Citations
17 Claims
-
1. A heart monitor comprising:
-
an electric signal acquisition and processing stage; two implantable electrodes configured to pick up myocardial electric signals; said electric signal acquisition and processing stage connected or being connectable to the two implantable electrodes; said electric signal acquisition and processing stage comprising a first channel and a second channel that are utilized as signal processing channels; said first channel comprising a first sampling stage configured to sample picked-up myocardial electric signals at a first sampling rate, said first channel configured to process the picked-up myocardial electric signals and generate an electrogram signal; said second channel comprising a high frequency sampling stage configured to sample at least portions of said picked-up myocardial electric signals at a second sampling rate to detect noise, wherein said second sampling rate is higher than said first sampling rate and wherein said sample picked-up myocardial electric signals at said first sampling rate and said sample at least portions of said picked-up myocardial electric signals at said second sampling rate occur in parallel to effectively sample each of said picked-up myocardial electric signals at a plurality of different time intervals; a differential stage configured to generate a high frequency sampled output signal that represents a difference between two consecutive high frequency sampled myocardial electric signal values; and
,a comparator that is configured to compare said high frequency sampled output signal with a threshold and to generate a noise detection indicator whenever said threshold is exceeded. - View Dependent Claims (2, 3, 4, 5, 6, 7)
-
-
8. A method for processing electric signals representing a time course of myocardial potentials comprising:
-
sampling a physiologic signal in a first channel with a first sampling rate; simultaneously sampling the physiologic signal in a second channel with a second sampling rate that is higher than said first sampling rate; forming a difference between two sampling values taken from said second channel; comparing said difference with a threshold; generating a noise detection indicator whenever said threshold is exceeded wherein said sampling, simultaneously sampling, forming, comparing and generating are accomplished with a heart monitor comprising an electric signal acquisition and processing stage; two implantable electrodes configured to pick up said physiologic signal comprising myocardial electric signals; said electric signal acquisition and processing stage connected or being connectable to the two implantable electrodes; said electric signal acquisition and processing stage comprising a first channel and a second channel that are utilized as signal processing channels; said first channel comprising a first sampling stage configured to sample picked-up myocardial electric signals at said first sampling rate, said first channel configured to process the picked-up myocardial electric signals and generate an electrogram signal; said second channel comprising a high frequency sampling stage configured to sample at least portions of said picked-up myocardial electric signals at said second sampling rate to detect noise, wherein said second sampling rate is higher than said first sampling rate and wherein said sample picked-up myocardial electric signals at said first sampling rate and said sample at least portions of said picked-up myocardial electric signals at said second sampling rate occur in parallel to effectively sample each of said picked-up myocardial electric signals at a plurality of different time intervals; a differential stage configured to generate a high frequency sampled output signal that represents said difference between two consecutive high frequency sampled myocardial electric signal values; and
,a comparator that is configured to compare said high frequency sampled output signal with said threshold and to generate said noise detection indicator whenever said threshold is exceeded. - View Dependent Claims (9, 10)
-
-
11. A heart monitor comprising:
-
an electric signal acquisition and processing stage; two implantable electrodes configured to pick up myocardial electric signals; said electric signal acquisition and processing stage connected or being connectable to the two implantable electrodes; said electric signal acquisition and processing stage comprising a first channel and a second channel that are utilized as signal processing channels; said first channel comprising a first sampling stage configured to sample picked-up myocardial electric signals at a first sampling rate, said first channel configured to process the picked-up myocardial electric signals and generate an electrogram signal; said second channel comprising a high frequency sampling stage configured to sample at least portions of said picked-up myocardial electric signals at a second sampling rate to detect noise, wherein said second sampling rate is higher than said first sampling rate and wherein a number of samples per second obtained at said second sampling rate is less than the sampling rate per second so that high frequency sampling does not occur continuously at said second sampling rate and wherein said sample picked-up myocardial electric signals at said first sampling rate and said sample at least portions of said picked-up myocardial electric signals at said second sampling rate occur in parallel to effectively sample each of said picked-up myocardial electric signals at a plurality of different time intervals; a differential stage configured to generate a high frequency sampled output signal that represents a difference between two consecutive high frequency sampled myocardial electric signal values; and
,a comparator that is configured to compare said high frequency sampled output signal with a threshold and to generate a noise detection indicator whenever said threshold is exceeded. - View Dependent Claims (12, 13, 14, 15, 16, 17)
-
Specification
-
- Resources
Litigation Campaign Assessment
Thank you for your request. You will receive a custom alert email when the Litigation Campaign Assessment is available.
×
-
Current AssigneeBiotronik SE & Company KG
-
Original AssigneeBiotronik VI Patent AG (Biotronik SE & Company KG)
-
InventorsWhittington, Hollis, Muessig, Dirk, Lang, Volker
-
Primary Examiner(s)Lavert, Nicole F
-
Application NumberUS12/391,208Publication NumberTime in Patent Office1,296 DaysField of Search600509-510, 600/515, 600/523US Class Current600/523CPC Class CodesA61B 5/283 InvasiveA61B 5/30 Input circuits thereforA61B 5/7207 of noise induced by motion ...A61B 5/7221 Determining signal validity...A61N 1/3684 for stimulating the heart a...
