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Diagnostcis

Electromyoneurography

EMNG pregled

Electromyoneurography examination

Electromyoneurography (EMNG) is a diagnostic method for evaluation of the electrical activities in muscles and nerves in order to define both the level and extent of the respective lesion.

EMNG evaluation is performed on a sophisticated and computerized equipment, usually starting with evaluation of conductivity in peripheral nerves – motor and / or sensitives ones.

The skilled interpretation of parameters obtained through the EMNG provides very useful information. These information, in correlation with clinical findings, are crucial in establishing diagnosis of various impairments of peripheral nervous system and muscles, as well as neuromuscular diseases.

EMNG clinic has the equipment of the newest generation. The evaluation itself is done with percutaneous electrodes, while needle electrodes are used for the evaluation of muscles.

EMNG is performed for patients of all ages. In case of children, it is necessary to have one parent present during the evaluation.

Optimal timing for the EMNG evaluation (in most cases) is three weeks after the onset of symptoms as it takes a while for an electrophysiological picture of the condition or injury to develop.

The EMNG evaluation does not require any preparations, it lasts between 30 and 45 minutes and due to needle electrodes it may cause some discomfort.

The Clinic for electrophysiology evaluation also has the PATHWAY system (Pain & Sensory Evaluation System), used for sensory and pain threshold evaluation. This evaluation is useful in diagnostics of thin nerve fibers which conduct the sensation of pain, warmth and cold, which classic EMNG evaluation cannot do.

Electromyography is indicated in the following confirmed or suspected conditions / diseases:

  • Radiculopathy – EMNG provides the precious information about the level and extent of damage, most commonly of lumbosacral or cervical roots (serves as an inclusive / exclusive criteria for surgical treatment and for the evaluation of it).
  • Focal neuropathies – traumatic injuries of nerves, nerve compression during the longer period of time (sleep paralysis of radial nerve), nerve entrapment in fibrous or osseous channel (e.g., Carpal tunnelsy), infarcts, tumors or infection of the nerve, Bell’s paresis (Blink reflex).
  • Metabolic neuropathies – diabetic, uremic or ethylic.
  • De-myelinating neuropathies – acute idiopathic demyelinating AIDP (Guillain Barré sy).
  • Hereditary polyneuropathies – HSMP (Morbus Charcot – Marie- Tooth).
  • Damage of plexuses – Brachial (birth acquired); post radiation damage, upper thoracic aperturesyndrome etc.), lumbosacral (traumatic, iatrogenic, etc.).
  • Diseases and damage of the motoric neurons – amyotrophic lateral sclerosis (ALS), spinal muscleatrophy (SMA) etc.
  • Myopathies – muscle dystrophies (Duchenne), polymyositis, dermatomyositis, myotonic dystrophies.
  • Myasthenia gravis and myasthenia-alike syndromes – neuromuscular transmission tests.
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