Animation of Botox Injection to Treat Spasmodic Dysphonia

A new animation has been created in cooperation with Intronix Technologies that demonstrates the steps involved to treat spasmodic dysphonia with EMG guided botulinum toxin. Spasmodic dysphonia is a neurologic condition characterized by vocal breaks during speech due to spasms of the vocal cord muscles. The most common type of spasmodic dysphonia is adductor spasmodic dysphonia where the vocal cords suddenly and involuntarily comes together causing the person’s voice to suddenly break off…

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New Paper Published by Dr. Chang on Spasmodic Dysphonia Treatment in the US

In the May 2009 edition of ENT Journal , Dr. Chang has published a paper titled "A Survey of Current Practices of Physicians Who Treat Adductor Spasmodic Dysphonia in the US." The paper was published online instead of the print magazine and can be read here for free after registration. The paper reports on a variety of factors considered when treating patients with adductor spasmodic dysphonia including surgery (what kind), botox type (A or B or both), how much botox, what concen…

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Spasmodic Dysphonia Treatment of Northern Virginia

This posting merely serves to provide notice for folks that our practice has been providing Botox injections for spasmodic dysphonia (both adductor and abductor types) since 2005 by Dr. Christopher Chang . We have patients coming from as far away as Norfolk, VA every 3-5 months to obtain this injection for SD relief. These injections are provided EVERY Friday afternoon (as long as he is not on vacation). If you have been receiving injections elsewhere and would like to start getting them i…

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New ADductor Spasmodic Dysphonia Audio Samples Posted

A patient with a very mild case of ADductor spasmodic dysphonia speaking a variety of phrases has been posted. The nice thing with this case is that only when saying certain "voice-weighted" phrases does the loss of vocal fluency become most apparent. The spasmodic dysphonia can be made less apparent when speaking "voiceless-weighted" phrases. Click here to hear the various audio clips. As an FYI, the voice-weighted phrases which accentuate ADductor spasmodic dysphonia a…

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