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Questions and Answers
What term is sometimes used interchangeably with 'pulsed current'?
What term is sometimes used interchangeably with 'pulsed current'?
Pulsed current flows continuously without interruption.
Pulsed current flows continuously without interruption.
False
What indicates the flow of pulsed current?
What indicates the flow of pulsed current?
The unidirectional or bidirectional flow of ions or electrons.
Pulsed current is characterized by the periodic _____ of electrical flow.
Pulsed current is characterized by the periodic _____ of electrical flow.
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Match the following concepts with their definitions:
Match the following concepts with their definitions:
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What is a biphasic pulse characterized by?
What is a biphasic pulse characterized by?
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Pulsed DC is produced by continuously maintaining a steady state of direct current.
Pulsed DC is produced by continuously maintaining a steady state of direct current.
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What kind of current source is used to produce pulsed DC?
What kind of current source is used to produce pulsed DC?
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A ______ pulse first deviates in one direction, then in the opposite direction.
A ______ pulse first deviates in one direction, then in the opposite direction.
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Match the following terms with their definitions:
Match the following terms with their definitions:
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Study Notes
Pulsed Current
- Pulsed current is a unidirectional or bidirectional flow of ions or electrons that periodically stops.
- It is created by temporarily interrupting a DC current source.
- Pulsed DC is commonly used as a term.
- A biphasic pulse changes direction, first in one direction, then in the other.
Frequency
- Frequency is the number of pulses per second.
- Measured in Hertz (Hz).
- A burst of pulses is a group of pulses occurring together.
- For example, 30 Hz burst frequency means 30 pulses per second.
Symmetrical & Asymmetrical Waveforms
- Symmetrical waveforms have equal phase charges.
Balanced & Unbalanced
- Balanced waveforms have equal phase charges and duration.
- Unbalanced waveforms have unequal phase charges and duration.
Red & Black Electrode and Polarity
- Red and black electrodes are used to identify positive (+) and negative (-) poles in electrical stimulation.
- The positive pole is also known as the anode, and the negative pole is known as the cathode.
- The cathode attracts positive ions, such as white blood cells and immune cells, to the treatment area.
Direct Current
- Direct current (DC) has a constant flow of electrons in one direction.
- Direct current (DC) is used for iontophoresis and wound care.
Polarity Effect
- The polarity of the current matters for direct current (DC), monophasic pulsed, and unbalanced asymmetrical waveforms.
- Cathode is the negative pole, and anode is the positive pole.
Iontophoresis
- Iontophoresis uses a weak electrical current to deliver medications through the skin.
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Description
Test your knowledge on pulsed current, frequency, waveforms, and electrode polarity in electrotherapy. This quiz covers fundamental concepts that are essential for understanding electrical stimulation techniques. Ideal for students and professionals in the field of physical therapy and rehabilitation.
