Diadynamic Therapy

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Introduction

Diadynamic therapy is an another example for low frequency current rarely used in UK but in mainland Europe has stronger following. it is monophasic sinusoidal current  was developed in the 1950's,by Bernard (a French Dentist). so it is called also Bernard current.The  frequency is operating at 50 Hz with pulse duration 10 msec.[1][2]

There are four different current available for Didynamic current.[3]

  1. Monophase fixe.(MF)
  2. Diphase fixe.(DF)
  3. Courtes periodes.(CP)
  4. Longues periodes.(LP)

Types of Diadynamic current

wave Physiological Effect Indication Feeling
DF Full wave alternating current Has strong analgesic effect for short duration Pain with muscle spasm Itching or prickling sensation
MF Half wave alternating current Stimulate muscle contraction Pain without muscle spasm Strong vibration sensation
CP Equal phase of DF and MF are alternating without interval pauses Stimulate circulation and reduce pain Traumatic pain Rapid alternating feeling between DF and MF
LP 10 sec MF followed by 5 sec DF in which intensity and frequency rise then fall long lasting analgesic effect Myalgesia\Neuralgia Strong vibration to little pricking

Clinical application of Diadynamic current

Pain spot application

The two electrodes are applied as a bipolar technique with the anode applied over pain spot and the cathode adjacent to it.

Nerve Trunk application

The two electrodes are placed along the course of the peripheral nerve where the nerve is superficial.

Para-vertebral application

The electrodes may be applied on both sides of the spine at the level of the nerve root supplying the painful area.

Vasotropic application

The electrodes are applied along the vascular paths affected in the circulatory disorders.

Trans-regional application

to treat a joint, electrodes positioned on opposite side of the joint.

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References

  1. de Carvalho, A. R., E. M. Fungueto, et al. "Bernard's diadynamic currents and iontophoresis in low back pain treatment (2005).
  2. Bolel, K., S. Hizmetli, et al.. "Sympathetic skin responses in reflex sympathetic dystrophy. (2006)
  3. Can, F., R. Tandoğan, et al.. "Rehabilitation of patellofemoral pain syndrome: TENS versus diadynamic current therapy for pain relief." The Pain Clinic (2003)