Hospital ECG machine is specialized instruments used to record ECGs. There are single-lead ECG machines and multi-lead ECG machines, with the ability to simultaneously record up to 12 leads. The control and lead switching methods vary, with manual analog ECG machines and computer-controlled digital ECG machines available.
The question of who discovered ECG machine is one that many people are curious about.
154 years ago today, on May 21st, 1860 (the first day of the fourth lunar month), the inventor of the ECG machine, Willem Einthoven, was born.
Einthoven (1860-1927) was a Dutch physiologist. He was born in Java to a military doctor, and in 1879 started studying at the University of Utrecht's medical school. He earned his doctorate in medicine in 1885, and the following year was appointed professor of physiology at Leiden University. He later became a member of the Royal Netherlands Academy of Arts and Sciences.
In 1895, Einthoven began researching heart action electrical currents, building on the work of British physiologist A.D. Waller. He improved upon the string galvanometer invented by de Sénarmont using a thin silver-coated quartz thread with a diameter of 0.002 millimeters to record cardiac electrical currents and sounds while overcoming the limitations of prior instruments.
In 1903, Einthoven established the standard unit of measurement for ECGs: one millivolt of electrical potential difference being represented by wave deflection of one centimeter on the vertical axis and movement of 0.4 seconds on the horizontal axis. He also used letters such as P, Q, R, S, and T to label the waves on ECGs and created three standard leads using electrodes placed on both hands and the left foot (which are still used today).
In 1912, Einthoven studied the normal range of variations in ECGs and proposed the theory of "Einthoven's triangle."
In recognition of his research on the mechanisms of ECGs and his invention of the ECG recorder, Einthoven was awarded the Nobel Prize in Physiology or Medicine in 1924.
When using an ECG machine, it is important to be aware of the precautions and instructions for use, and to use the machine correctly.
The operating steps for an ECG machine are as follows:
1. Verify patient information, explain the procedures and precautions to the patient, obtain the patient's cooperation.
2. Properly connect the power cord, turn on the machine, check its performance, ensure that ECG paper is loaded correctly, and enter the patient's information accurately.
3. Expose the patient's inner wrists, ankles, and chest, observe for metal objects or skin conditions, and wipe the upper inner wrist and upper ankle with a cotton swab soaked in saline solution. Pay attention to keeping the patient warm and respecting their privacy.
4. Connect the lead-limb and chest electrodes according to the instructions.
5. Verify the patient information again, wait until the ECG waveform is stable without interference, record the ECG waveform, and press the "START" button to print the ECG graph.
6. After printing is complete, turn off the machine, and verify the patient's information once more.
7. Remove the electrodes from the patient's body, wipe the skin, and pay attention to any skin conditions that may require special attention.
8. After using the machine, turn off the power, clean the equipment, and complete the equipment usage registration forms.
ECG machines are available for home and medical use. Portable home-use machines typically cost around $100-$300, but prices may vary depending on brand. Dynamic ECG machines for medical use require a computer, analysis software, and a recording box, and typically cost between $10,000 and $20,000. These machines record all of a patient's cardiac activity over a 24-hour period, and are used to diagnose angina and arrhythmia, and determine the effectiveness of treatments.