EKG measurement device

• US 7,899,521 B2
• Filed: 09/24/2008
• Issued: 03/01/2011
• Est. Priority Date: 09/28/2007
• Status: Expired due to Fees

• Current Assignee: Siemens Healthcare GMBH (Siemens AG)
• Original Assignee: Siemens AG
• Inventors: Rössler, Jürgen, Frank, Michael, Heggen, Sven, Demharter, Nikolaus
• Primary Examiner(s): Layno; Carl H
• Assistant Examiner(s): Gedeon; Brian T
• Application Number:
  US12/284,690
• Publication Number:
  US 20090088654A1
• Time in Patent Office: 888 Days
• Field of Search: 600/509, 600/521
• US Class Current: 600/509
• CPC Class Codes: A61B 5/055 involving electronic [EMR] or nuclear [NMR] magnetic resonance, e.g. magnetic resonance imaging
• CPC Class Codes: A61B 5/30 Input circuits therefor
• CPC Class Codes: A61B 5/305 Common mode rejection
• CPC Class Codes: A61B 5/308 for electrocardiography [ECG]
• CPC Class Codes: A61B 5/7285 for synchronising or triggering a physiological measurement or image acquisition with a physiological event or waveform, e.g. an ECG signal A61B6/5205, A61B6/541, A61B8/5207, A61B8/543 take precedence

Abstract

The invention relates to an EKG measurement device. The EKG measurement device comprises a number of EKG electrodes and a common-mode measurement unit connected on its input side to the EKG electrodes. Inventively an EKG trigger unit is connected on its input side to the EKG electrodes and to the common-mode measurement unit.

Claims

1. An EKG measurement device, comprising:

an EKG electrode that generates an EKG signal of a patient;

a common-mode measurement unit with an input side connected to the EKG electrode that generates a common mode signal based on the EKG signal; and

an EKG trigger unit with an input side connected to the EKG electrode and to the common-mode measurement unit that detects the common mode signal and triggers the EKG measurement device based on the detection,

wherein the EKG electrode is connected to the common-mode measurement unit via a lowpass filter.

2. The EKG measurement device as claimed in claim 1, wherein the EKG trigger unit comprises a trigger signal generator unit that generates a trigger signal based on the EKG signal.

3. The EKG measurement device as claimed in claim 2, wherein the EKG trigger unit comprises a control unit that controls the trigger signal generation unit based on the common mode signal.

4. The EKG measurement device as claimed in claim 1,

wherein the common-mode measurement unit is connected to the EKG trigger unit via a subtractor, and

wherein an input side of the subtractor is connected to a further electrode.

5. The EKG measurement device as claimed in claim 1, wherein an output side of the common-mode measurement unit is connected to a further electrode.

6. The EKG measurement device as claimed in claim 1,

wherein the common-mode measurement unit is connected to the EKG trigger unit via a subtractor,

wherein an input side of the subtractor is connected to a further electrode, and

wherein an output side of the common-mode measurement unit is connected to the further electrode.

7. The EKG measurement device as claimed in claim 1, wherein an inverter is inserted between the common-mode measurement unit and a further electrode.

8. The EKG measurement device as claimed in claim 1, wherein the common-mode measurement unit is connected to a further electrode via a further lowpass filter.

9. The EKG measurement device as claimed in claim 1, wherein the common-mode measurement unit comprises an amplifier.

10. The EKG measurement device as claimed in claim 1, wherein the EKG measurement device is configured to be used during a magnetic resonance image of the patient.