[KDS-1040] Electrocardiogram sensor (ECG/EKG sensor) User's Manual
Note This product is designed for educational use only. Not recommended for industrial, medical, commercial use. What is Electrocardiogram? The heart functions as a pump for circulating blood to the body by repetition of contraction and enlargement. The cardiac electric potential is produced in the body during heart contraction. Electrocardiogram can be measured by leading this electrical signals to other body position and amplify. Inventory of Items Included with the EKG Sensor Please check the composition of the product. 1 Electrocardiogram sensor (EKG sensor) 2 EKG Electrode patch 100EA (1 Pack) 3 manual Specifications Range of EKG sensor EKG - Range : 0~5mV Pulse - Range : 47 ~ 250bpm Resolution : 5 μv Resolution : 1bpm 2
Using the EKG sensor with computer You can use EKG sensor with Science cube Lite II or Science cube pro interface which we provides. You can use as following. 1 Connect EKG sensor and interface to your computer. 2 Start excel program or simple logger or SC logger program. 3 Set the program. ex) Connect EKG sensor and interface to your computer. Then, start excel program. Check the "input setting" part from "experiment setting" menu.) measurement interval(sec) - 0.02 Time for experiment(sec) - 60 repetition length(n) -20 Reset the value as above. 3
Click "new chart" from science experiment menu. Select chart type by click right button of mouse on the chart. Choose dispersion type for graph. 4
Then, Click "experiment start" from science experiment menu. Electrocardiogram waveform Electrocardiogram wave form is influenced by electrical activation step which is consist of P, Q, R, S, T. P-Wave The P wave is the electrical signature or the current that causes atrial contraction. Both the left and right contract simultaneous may indicate arrhythmia. Its relationship to QRS complexes determines the presence of a heart block. 5
QRS-Complex The QRS complex corresponds to the current that causes contraction of the left and right ventricles, which is much more forceful than that of the atria and involves more muscle mass, thus resulting in a greater EKG deflection. The Q wave, when present, represents the small horizontal(left to right) current as the action potential travels through the interventricular septum. Very wide and deep Q waves do not have a septal origin, but indicate myocardial infarction. The R and S waves indicate contraction of the myocardium. Abnormalities in the QRS complex may indicate bundle branch block(when wide), ventricular origin of tachycardia, ventricular hypertrophy or other ventricular abnormalities. The complexes are often small in pericarditis. T-Wave The T wave represents the repolarization of the ventricles. The QRS complex usually abscures the atrial repolarization wave so that it is not usually seen. Electrically, the cardiac muscle cells are like loaded springs. A small impulse sets them off, they depolarize and contract. Setting the spring up again is repolarization. Connecting the EKG sensor to a person Use three electrode patches per subject. The electrodes can be reused, but they tend to absorb moisture so, reuse is not recommended. Once opened, the electrodes should be kept in refrigerator with air-tight container. But, you can't preserve more than 1 year if you keep the electrodes as above. 1 Because the electrical signal produced by the heart and detected at the body's surface is so small, it is very important that the electrode patch makes good contact with the skin. 2 Peel first electrode from the backing paper. Place it on the inside of the right elbow. 6
3 Place a second electrode on the right wrist. 4 Place a third electrode on the left wrist. 5 Connect the clips from sensor to the tabs on the edges of the electrode patches. 6 Connect white clip to the right elbow electrode patch. 7 Connect red clip to the right wrist electrode patch. 8 Connect blue clip to the left wrist electrode patch. Various experiments can be performed using this sensor. 1 Monitor resting EKG 2 Study the P, Q, R, S and T wave forms 3 Monitor EKG after mild exercise 4 Investigating EKG with different body position. 5 Investigating EKG changes after mild stimulants. Monitor EKG after mild exercise Using the EKG sensor, record an EKG of a person who is initially at rest. Disconnect the sensor wires from the electrode patches, but leave the patches on the person being monitored. Have the person exercise for a few minutes like jogging. Reattach the sensor wires to the electrodes on the person when they have finised exercising and record a new EKG. Compare the resting EKG to the EKG after mild exercise. 7
Investigating EKG with different body position. Record the resting EKG first. Then have the person sit, stand or lie down. Compare your results with your resting EKG. Investigating EKG changes after mild stimulants Record resting EKG. Drink a couple of cups of caffeinated coffee or cola. Compare your results with at rest and following mild exercise. Note: This might show less effect on people who are accustomed to large amounts of caffeine. # 804 Ace Twin Tower 2, 212-30 Guro-3-dong, Guro-gu, Seoul, R.O Korea P.O Box : 152-779 Tel (+82) 2-2109-8878 Fax (+82) 2-2109-8881 sales@koreadigital.com www.sciencecube.com Rev. November, 2012 All other marks not owned by us that appear herein are the property of their respective owners, who may or may not be affiliated with, connected to, or sponsored by us.