US 8,942,792 B2 · ECG calculation method for use in generating 12 lead ECG measurements from devices that have less than 10 electrodes

Abstract

A method for generating an ECG measurement associated with a point on a patient's body such as one of the precordial points is disclosed for use with an apparatus that cannot make contact with the leg and the point simultaneously. The method includes simultaneously recording a hand signal and a leg signal during a first time period. The hand signal is also measured during a second time period together with a chest signal corresponding to one of the precordial points. A signal representing the leg signal in the second time period is then computed from the first time period data. A reference signal is then generated from the hand signal and computed leg signal during the second time period. The reference signal is then combined with the chest signal to provide the corresponding precordial signal.

Claims13

Dependent claims

A method for generating an ECG measurement that depends on an average signal that includes signals from the left and right hands and one leg of a patient, said method comprising:

simultaneously recording a hand signal and a leg signal during a first time period, said hand signal comprising a difference of said signals from said left and right hands;
recording said hand signal during a second subsequent time period;
computing a signal representing said leg signal in said second time period from said leg signal during said first time period by comparing a function of said hand signals during said second time period with said function of said hand signals during said first time period;
and
generating a computed reference signal representing said leg and hand signals during said second time period.

2 more elements

A method for generating a precordial ECG measurement with a probe having first, second, and third electrodes on an outer surface of a housing, said method comprising:

simultaneously contacting said patient's left hand with said first electrode, said patient's right hand with said second electrode, and one of said patient's legs with said third electrode;
measuring signals between said first, second, and third electrodes during a first time period and generating a hand signal and a leg signal in said first time period;
placing said third electrode against a predetermined point on said patient's chest while contacting said first and second electrodes with said left and right hands, respectively;
measuring signals between said first, second, and third electrodes during a second time period to provide a chest signal and a hand signal during a second time period;
computing an approximate leg signal in said second time period from said measured hand and leg signals during said first time period by comparing said hand signal in said second time period with said hand signal during said first time period;
and
computing the difference between said chest signal and a weighted sum of said approximate leg signal and said hand signal in said second time period to provide said chest measurement.

4 more elements

Dependencies are inferred from the claim text.

ECG calculation method for use in generating 12 lead ECG measurements from devices that have less than 10 electrodes

Life of this patent

ECG calculation method for use in generating 12 lead ECG measurements from devices that have less than 10 electrodes

Life of this patent

Abstract

Claims13