väliselektroodi

Väliselektrood refers to an external electrode used in various medical and scientific applications. These electrodes are typically placed on the surface of the body or other external objects to measure or stimulate electrical activity. Their primary function is to detect or transmit electrical signals without the need for invasive procedures.

In the context of electrocardiography (ECG), väliselektroodid are adhesive pads placed on the skin to record the heart's electrical activity. These recordings help diagnose various cardiac conditions. Similarly, in electroencephalography (EEG), väliselektroodid are attached to the scalp to monitor brainwave patterns, aiding in the diagnosis of neurological disorders.

Beyond diagnostics, väliselektroodid are employed in therapeutic devices. For instance, transcutaneous electrical nerve stimulation (TENS) units use external electrodes to deliver electrical impulses to relieve pain. Neuromuscular electrical stimulation (NMES) also utilizes väliselektroodid to induce muscle contractions for rehabilitation or strengthening purposes.

The design and material of väliselektroodid vary depending on their intended use. They are often made from conductive materials like silver, carbon, or hydrogel, and are designed to ensure good electrical contact with the skin while minimizing irritation. The proper placement and application of these electrodes are crucial for obtaining accurate and reliable data or effective therapeutic outcomes.