Diadynamic Currents in Physical Therapy

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What is the carrier frequency of Diadynamic currents?

50Hz

What is the origin of the name 'Diadynamic'?

Greek, meaning 'through force'

What type of current are Diadynamic currents?

Monophasic sinusoidal currents

When were Diadynamic currents first described and used in clinical practice?

1950

What is the frequency of the carrier wave of Diadynamic currents?

Sine wave at 50Hz

What is responsible for erythema of the skin and itching or burning sensation felt under the negative electrode during therapy?

Sodium hydroxide accumulation

What may lead over time to skin damage and burn if used as a cathode?

Monophasic nature of diadynamic current

What is considered sclerotic and tends to harden tissues through protein coagulation?

HCl agtic node reaction

What is responsible for acid accumulation under the positive (anode) electrode?

Chloride ions (Cl- from NaCl)

What is the composition of human tissues that leads to electrolysis when continuous DC flows through them?

Approximately 70% sodium chloride (Na+Cl−) and water (H2O)

Which diadynamic mode involves alternating delivery of equal pauses, increasing blood supply in a traumatic area to reduce pain?

Short Period (CP)

What is the frequency of the monophasic pulsed current produced by Half-Wave Rectification (Monophase Fixe)?

50Hz

What is the therapeutic effect of Diadynamic currents related to sensory nerves stimulation?

Pain relief

Which Diadynamic mode is suitable for neuralgia, myalgia, arthralgia, and chronic pain conditions?

Long Period (LP)

What is the main difference between Half-Wave Rectification (Monophase Fixe) and Full-Wave Rectification (Diphasé Fixe)?

Frequency of the pulsed current

What is the result of the continuous DC flow through human tissues during Diadynamic current therapy?

ACID accumulation under the POSITIVE (anode) electrode

What is the primary contraindication for using Diadynamic currents?

Over neoplastic lesion

What is the danger associated with using Diadynamic currents as a cathode?

Skin breakdown and burn

What is responsible for ALKALINE accumulation under the NEGATIVE (cathode) electrode during Diadynamic current therapy?

Positively charged sodium ions (Na+ from NaCl) moving towards the cathode

What is the result of the continuous DC flow through human tissues during Diadynamic current therapy over time?

Redistribution of sodium and chloride

What is the carrier frequency of Diadynamic currents?

50Hz

What is the origin of the name 'Diadynamic'?

From the Greek, dia means through and Dynamis means force

What is the therapeutic effect of Diadynamic currents related to?

Sensory nerves stimulation

Which Diadynamic mode is suitable for neuralgia, myalgia, arthralgia, and chronic pain conditions?

Bernard current

What is the composition of human tissues that leads to electrolysis when continuous DC flows through them?

Water and salts

What is the frequency of the Full-Wave Rectification (Diphasé Fixe) current?

100Hz

Which diadynamic mode is used for pain treatment without muscle spasm?

Fixed Monophase (MF)

What is the primary therapeutic effect of Fixed Diphasé (DF) diadynamic mode?

Improving circulation

Which diadynamic mode involves alternating delivery of equal pauses to increase blood supply in a traumatic area?

Short Period (CP)

What is the main concern regarding the amplitude of Diadynamic currents?

Increased risk of skin damage

Match the following terms with their correct descriptions:

Symmetrical sinusoidal current (AC) = A type of alternating current with equal positive and negative half-cycles Diadynamic current = A low-frequency current named after the Greek words for 'through' and 'force' Pulsed DC current = A type of direct current that is delivered in pulses Full-Wave Rectification (Diphasé Fixe) = A diadynamic mode suitable for neuralgia, myalgia, arthralgia, and chronic pain conditions

Match the following terms with their correct descriptions:

Symmetrical rectangular (AC) current = A type of alternating current with equal positive and negative voltage levels Bernard current = Another name for Diadynamic current, named after the French dental surgeon who first described and used it in clinical practice Monophasic sinusoidal current = A type of Diadynamic current that is a variation of sinusoidal current Half-Wave Rectification (Monophase Fixe) = A diadynamic mode involving alternating delivery of equal pauses to increase blood supply in a traumatic area

Match the following terms with their correct descriptions:

Asymmetrical current = A type of current with unequal positive and negative half-cycles Carrier frequency = The frequency of the sine wave used in Diadynamic currents, operating at 50Hz Symmetrical current = A type of current with equal positive and negative half-cycles Fixed Diphasé (DF) = A diadynamic mode with primary therapeutic effect related to sensory nerves stimulation

Match the following terms with their correct descriptions:

Polyphasic (AC) current = A type of alternating current with multiple phases Rectified alternating current = Another term for Diadynamic current, which is a variation of sinusoidal current DC rectangular current = A type of direct current with constant voltage levels ALTERNATING current = A type of current that periodically reverses direction

Match the following terms with their correct descriptions:

Erythema and burning sensation = The result of continuous DC flow through human tissues during Diadynamic current therapy over time Electrolysis = The composition of human tissues that leads to electrolysis when continuous DC flows through them Sclerotic effect = The primary concern regarding the amplitude of Diadynamic currents Skin damage and burn = What may lead over time to skin damage and burn if used as a cathode during Diadynamic current therapy

Match the following terms with their correct descriptions:

Sclerotic = Tends to harden tissues through protein coagulation Sclerolytic = Tends to soften the skin, exposing it to potential irritation and burn Neoplastic lesion = Contraindication for applying Diadynamic currents Electrolysis of salted water medium = Result of continuous DC flow through human tissues

Diadynamic currents can be safely applied over neoplastic lesions

False

Continuous DC flow through human tissues during Diadynamic current therapy leads to redistribution of sodium and chloride

True

Acid accumulation occurs under the negative (anode) electrode during Diadynamic current therapy

False

Study Notes

Diadynamic Currents in Physical Therapy

  • Diadynamic current has two basic forms: Half-Wave Rectification (Monophase Fixe) and Full-Wave Rectification (Diphasé Fixe).
  • Half-Wave Rectification (Monophase Fixe) eliminates the second half of each AC cycle, producing a monophasic pulsed current with a frequency of 50Hz.
  • Full-Wave Rectification (Diphasé Fixe) duplicates the second half of each AC cycle, producing a direct monophasic current with a frequency of 100Hz.
  • Diadynamic modes include Fixed Monophase (MF), Fixed Diphasé (DF), Short Period (CP), Long Period (LP), and Syncopal Rhythem (RS).
  • Fixed Monophase (MF) stimulates muscles, produces muscle contraction, and is used for pain treatment without muscle spasm.
  • Fixed Diphasé (DF) stimulates autonomic nervous system, improves circulation, and has a strong analgesic effect for a short duration.
  • Short Period (CP) involves alternating delivery of equal pauses, increasing blood supply in a traumatic area to reduce pain.
  • Long Period (LP) consists of 10 seconds of MF followed by 5 seconds of DF, suitable for neuralgia, myalgia, arthralgia, and chronic pain conditions.
  • Syncopal Rhythem (RS) involves fixed durations of MF followed by equal rest durations, used for pain relief, inflammation decrease, muscle re-education, and increased local circulation.
  • Diadynamic currents have therapeutic effects including pain relief, improved circulation, decreased inflammation and swelling, muscle re-education, and facilitation of tissue healing.
  • Diadynamic currents stimulate sensory nerves leading to pain relief and also stimulate endorphins and encephalins release for pain suppression.
  • Diadynamic currents have a relative high DC amplitude, which may increase the risk of skin damage, and treatment time should be limited to avoid skin damage, particularly in cases like Raynaud syndrome.

Diadynamic Currents in Physical Therapy

  • Diadynamic current has two basic forms: Half-Wave Rectification (Monophase Fixe) and Full-Wave Rectification (Diphasé Fixe).
  • Half-Wave Rectification (Monophase Fixe) eliminates the second half of each AC cycle, producing a monophasic pulsed current with a frequency of 50Hz.
  • Full-Wave Rectification (Diphasé Fixe) duplicates the second half of each AC cycle, producing a direct monophasic current with a frequency of 100Hz.
  • Diadynamic modes include Fixed Monophase (MF), Fixed Diphasé (DF), Short Period (CP), Long Period (LP), and Syncopal Rhythem (RS).
  • Fixed Monophase (MF) stimulates muscles, produces muscle contraction, and is used for pain treatment without muscle spasm.
  • Fixed Diphasé (DF) stimulates autonomic nervous system, improves circulation, and has a strong analgesic effect for a short duration.
  • Short Period (CP) involves alternating delivery of equal pauses, increasing blood supply in a traumatic area to reduce pain.
  • Long Period (LP) consists of 10 seconds of MF followed by 5 seconds of DF, suitable for neuralgia, myalgia, arthralgia, and chronic pain conditions.
  • Syncopal Rhythem (RS) involves fixed durations of MF followed by equal rest durations, used for pain relief, inflammation decrease, muscle re-education, and increased local circulation.
  • Diadynamic currents have therapeutic effects including pain relief, improved circulation, decreased inflammation and swelling, muscle re-education, and facilitation of tissue healing.
  • Diadynamic currents stimulate sensory nerves leading to pain relief and also stimulate endorphins and encephalins release for pain suppression.
  • Diadynamic currents have a relative high DC amplitude, which may increase the risk of skin damage, and treatment time should be limited to avoid skin damage, particularly in cases like Raynaud syndrome.

Diadynamic Currents in Physical Therapy

  • Diadynamic current has two basic forms: Half-Wave Rectification (Monophase Fixe) and Full-Wave Rectification (Diphasé Fixe).
  • Half-Wave Rectification (Monophase Fixe) eliminates the second half of each AC cycle, producing a monophasic pulsed current with a frequency of 50Hz.
  • Full-Wave Rectification (Diphasé Fixe) duplicates the second half of each AC cycle, producing a direct monophasic current with a frequency of 100Hz.
  • Diadynamic modes include Fixed Monophase (MF), Fixed Diphasé (DF), Short Period (CP), Long Period (LP), and Syncopal Rhythem (RS).
  • Fixed Monophase (MF) stimulates muscles, produces muscle contraction, and is used for pain treatment without muscle spasm.
  • Fixed Diphasé (DF) stimulates autonomic nervous system, improves circulation, and has a strong analgesic effect for a short duration.
  • Short Period (CP) involves alternating delivery of equal pauses, increasing blood supply in a traumatic area to reduce pain.
  • Long Period (LP) consists of 10 seconds of MF followed by 5 seconds of DF, suitable for neuralgia, myalgia, arthralgia, and chronic pain conditions.
  • Syncopal Rhythem (RS) involves fixed durations of MF followed by equal rest durations, used for pain relief, inflammation decrease, muscle re-education, and increased local circulation.
  • Diadynamic currents have therapeutic effects including pain relief, improved circulation, decreased inflammation and swelling, muscle re-education, and facilitation of tissue healing.
  • Diadynamic currents stimulate sensory nerves leading to pain relief and also stimulate endorphins and encephalins release for pain suppression.
  • Diadynamic currents have a relative high DC amplitude, which may increase the risk of skin damage, and treatment time should be limited to avoid skin damage, particularly in cases like Raynaud syndrome.

Test your knowledge of diadynamic currents in physical therapy with this quiz! Explore the different modes of diadynamic current, their therapeutic effects, and safety considerations.

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