Introduction
Summary
- The notes provide an in-depth look at electrotherapy, utilizing various frequencies of electric currents for medical treatments, including muscle stimulation and pain management. It also covers the use of electronic devices such as defibrillators and pacemakers for heart rhythm management, as well as drug electrophoresis for targeted drug delivery. The various frequencies employed range from low to ultra-high, each serving specific therapeutic purposes, from muscle contractions to enhanced blood circulation and metabolic processes.
Electrotherapy
- Definition: Electrotherapy involves using electrical energy as a medical treatment, employing various devices such as brain stimulators and muscle stimulators for conditions ranging from neurological disorders to muscle rehabilitation.
- Low Frequency: Under 800Hz; used primarily for muscle stimulation and pain modulation. Notable techniques include:
- Triangle waves under 100Hz with a pulse duration of 1ms stimulate muscle contraction.
- TENS (Transcutaneous Electrical Nerve Stimulation) utilizes rhythmical teasers with small impulse durations (under 0.5ms and 80-250Hz) for pain modulation.
- Diadynamic currents combine monopolar impulses (50Hz) or doubly rectified bursts (100Hz) to change ion concentrations and cell membrane permeability.
- Mid Frequency: 800-5000Hz; penetrates deeper into tissue without causing pain, mainly enhancing blood circulation and pain suppression.
High and Ultra-Frequency Electrotherapy
- High Frequency: 500-600kHz at voltages up to 15kV, used in electrosurgery for cutting and coagulating tissues with minimal blood loss and thermal sterilization (electrotomy).
- Ultra-High Frequency: Known as inductothermy, uses a magnetic field to induce harmonic vibrations in blood electrolytes. It's most e ffective in body liquids and internal organs, enhancing blood supply, metabolic processes, and serving as a painkiller.
Cardiac Devices
- Pacemakers: Battery-powered devices implanted under the skin, generating impulses (about 10V, 60-70 per minute) to induce heart contractions.
- Defibrillators: Employed to restore heart activity using strong, short-term electric currents (20A amplitude), which can stop and resume heart rhythms effectively.
Electric Muscle Stimulation
- Uses electrical impulses to stimulate muscle contraction, aiding in muscle rehabilitation and pain relief.
Drug Electrophoresis
- Involves the migration and separation of charged particles under an electric field, enhancing the targeted delivery of medications into tissues.