Cardiac diagnosis instrument

• US 4,825,874 A
• Filed: 09/22/1987
• Issued: 05/02/1989
• Est. Priority Date: 10/17/1986
• Status: Expired due to Term

• Current Assignee: Hans J. Uhlemann
• Original Assignee: Hans J. Uhlemann
• Inventors: Uhlemann, Hans J.
• Primary Examiner(s): Jaworski, Francis
• Assistant Examiner(s): Manuel, George
• Application Number:
  US07/099,739
• Time in Patent Office: 588 Days
• Field of Search: 128/696, 128/690, 128/710, 128/706, 128/687, 128/689
• US Class Current: 600/523
• CPC Class Codes: A61B 5/02438 with portable devices, e.g. worn by the patient
• CPC Class Codes: A61B 5/332 Portable devices specially adapted therefor
• CPC Class Codes: A61B 5/339 Displays specially adapted therefor

Abstract

According to the present invention there is provided a cardiac diagnosis instrument including an elongated housing, diagnosis electronics accommodated within the housing and two pick-up electrodes mounted on one long side of the housing close to the front and rear ends of the instrument and electrically connected to the diagnosis electronics, a voltage source within the housing, a flat thin graphic display unit which extends along one side for a substantial part of the length of the housing on the opposite side to that on which the pick-up electrodes are located, an on-off switch, said graphic display unit and said on-off switch being electrically connected to the diagnosis electronics, said diagnosis electronics including evaluation electronics and actuation electronics for the graphic display unit, said housing having a tubular shape somewhat like that of a fountain pen, and by placing the housing on a region of the body of a patient, the pick-up electrodes may be pressed into contact with the skin of the patient and thus the frequency of the heart beat, an electrocardiogram (ECG), the QRS complex of an ECG, an electroencephalogram (EEG) or the like may be investigated through the medium of the pick-up electrodes. Preferably one of the pick-up electrodes is in the form of a holding clip starting from one end of the housing.

Claims

1. Cardiac diagnosis instrument including an elongated housing, diagnosis electronics accommodated within the housing and two pick-up electrodes mounted on one long side of the housing close to the front and rear ends of the instrument and electrically connected to the diagnosis electronics, a voltage source within the housing, a flat thin graphic display unit which extends along one side for a substantial part of the length of the housing on the opposite side so that on which the pick-up electrodes are located, on on-off switch, said graphic display unit and said on-off switch being electrically connected to the diagnosis electronics, said diagnosis electronics including evaluation electronics and actuation electronics for the graphic display unit, said housing having a tubular shape somewhat like that of a fountain pen, and by placing the housing on a region of the body of a patient, the pick-up electrodes may be pressed into contact with the skin of the patient and thus the frequency of the heart beat, an electrocardiogram (ECG), and the QRS complex of an ECG may be investigated through the medium of the pick-up electrodes, and wherein one of the pick-up electrodes is in the form of a holding clip starting from one end of the housing.

2. Cardiac diagnosis instrument in accordance with claim 1, wherein the housing has a length from 100 up to 160 mm, preferably 130 mm, and a diameter--or maximum diameter--from 10 up to 40 mm, preferably 16 mm.

3. Cardiac diagnosis instrument in accordance with claim 1, wherein the resolution of the graphic display unit is adjusted automatically depending upon the maximum amplitude of the heart action.

4. Cardiac diagnosis instrument in accordance with claim 3, wherein there is a reference display, preferably a 1.0 mV-Block, corresponding to a selected or given resolution, provided in the graphic display unit.

5. Cardiac diagnosis instrument in accordance with claim 1, wherein an ECG displayed on the graphic display unit may be selectively retained (freezing of the display), wherein the freezing of the display is effected automatically at the actual time when the pick-up electrodes are removed from contact with the skin of a patient after completion of an observation.

6. Cardiac diagnosis instrument in accordance with claim 5, wherein the replacement of the pick-up electrodes on the skin causes erasure of the retained ECG and initiates the continuation of the observation procedure.

7. Cardiac diagnosis instrument in accordance with claim 6, wherein the path resistance between the pick-up electrodes serves as the criterion for initiation of the procedure so that, in particular, the ECG will be actively displayed at a path resistance of less than 3 kiloohms and the ECG display will be frozen on the screen when the path resistance is greater than 3 kiloohms.

8. Cardiac diagnosis instrument in accordance with claim 7, wherein the path resistance between the pick-up electrodes serves as the criterion for initiation of the procedure so that, in particular, the ECG will be actively displayed at a path resistance of less than 3 kiloohms and the ECG display will be frozen on the screen when the path resistance is greater than 3 kiloohms.

9. Cardiac diagnosis instrument in accordance with claim 1, wherein the on-off switch and any other desired switches are implemented as a sliding switch which is arranged or attached in the longitudinal direction of the housing.

10. Cardiac diagnosis instrument in accordance with claim 1, wherein an examination pen-light is provided at one end of the housing.

11. Cardiac diagnosis instrument including an elongated housing diagnosis electronics accommodated within the housing and two pick-up electrodes mounted on the housing close to the front and rear ends of the instrument and electrically connected to the diagnosis electronics, a voltage source within the housing, a flat thin graphic display unit which extends along one side of the housing, an on-off switch, said graphic display unit and said on-off switch being electrically connected to the diagnosis electronics, said diagnosis electronics including evaluation electronics and actuation electronics for the graphic display unit, said housing having a tubular shape somewhat like that of a fountain pen, and by placing the housing on a region of the body of a patient, the pick-up electrodes may be pressed into contact with the skin of the patient for enabling electrically monitorable physical conditions of the patient to be investigated through the medium of the pick-up electrodes, and wherein an examination pen-light is provided at one end of the housing.