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Showing posts with label vocal cord. Show all posts
Showing posts with label vocal cord. Show all posts

Sunday, November 4, 2012

Breathing or Voice... You Can Only Have One...

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Sounds like a choice taken out of a morbid horror movie...

"You can ONLY have one... Your voice or your breath..."

The victim than loses one or the other after making a choice getting either the tongue or head cut off with a knife.

But patients with vocal cord paralysis on both sides are essentially faced with this very question.

Normally, the vocal cords (TVC in picture below) found in the voicebox move to accommodate talking or breathing.


When the vocal cords are apart, breathing occurs allowing air to pass unimpeded between the vocal cords and down into the lungs. However, with talking, the vocal cords come together tightly and vibrate creating voice. Watch a movie.

However, when both vocal cords become paralyzed, they neither move apart to help with breathing nor come together to assist with talking. Indeed, the voice and breathing BOTH stink.

It is in just this situation that the choice of breathing or voice becomes important because a patient can not have both. Improving one will sacrifice the other.

To explain this connection of voice and breathing further, normally, when the vocal cords are both moving fine, the voice is at 100% and breathing is at 100%. However, with bilateral paralysis, the voice and breathing are now linked to each other and collectively can not exceed 100%. As such, a patient with new onset bilateral vocal cord paralysis may start with a 40% of normal vocal quality and 60% of normal breathing ability for a total of 100%.

Using this scenario as a starting point where vocal quality is at 40% and breathing is at 60% of normal...

If a patient chooses to improve the vocal quality from 40% to 100% (an improvement of 60%), then breathing WILL correspondingly decrease 60% down to 0%... and potentially die given the ability to breathe is lost. Why? Because the vocal cords can be surgically forced together to allow for voice... but given the vocal cords are paralyzed, they can not move back apart to allow for breathing.


If a patient chooses to improve breathing quality from 60% to 100% (an improvement of 40%),  then the vocal quality WILL correspondingly decrease 40% down to 0%... and lose the ability to talk. Why? Because the vocal cords can be surgically forced apart to allow for breathing... but given the vocal cords are paralyzed, they can not move back together to allow for vocal cord vibration.


The total percentage of vocal and breathing quality can never be more than 100%. If a patient wants the best possibly voice and breathing, than a compromise would be to increase the vocal quality 10% from 40% to 50%, but understanding that this 10% improvement in vocal quality WILL mean a corresponding 10% decrease in breathing ability from 60% to 50%. This 10% change means that in the end, the voice and breathing would both end up at 50% of normal.

In most cases of bilateral vocal cord paralysis, it is the reduced breathing and shortness of breath that bothers people the most. The voice isn't good, but when given the choice, most people choose to try and improve their breathing ability understanding their voice may further deteriorate.

To read more about such treatment options, click here.

Saturday, October 13, 2012

Synthetic Vocal Cords [video]

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Synthetic vocal cords being under development at MIT and Harvard... Very good video!

What are some of the vocal cord problems that may benefit from such a synthetic gel? Vocal cord paralysis, vocal cord surgery to address polyps, cysts, nodules, granulomas, etc.

As an FYI... the synthetic vocal cord gel portrayed in the video is still under development and not available for patient use yet...

R&B Singer Maxwell with Vocal Cord Hemorrhage

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At least that's what the Washington Post reported on June 22, 2012. This has resulted in cancellation of his summer tour.

Per media reports, his vocal cords are swollen with hemorrhage.

Some fans may recall that something similar happened to Adele in winter of 2011 which resulted in her also canceling a number of engagements. She ultimately had surgery to correct her problem.

Normally, the vocal cords are pearly white without any vasculature. Watch a video of how this exam is performed.


However, when a blood vessel is present in the vocal cords, they may look something like this:


The issue with a blood vessel within the vocal cord itself is that it fluctuates in size due to whether it is irritated from phono-trauma or even hormones. Such fluctuation in size causes the voice to change in pitch and quality on an hour to hour basis depending on how much swelling occurs. For a singer, it makes the voice unpredictable.

When the blood vessel becomes engorged and traumatized, it may even rupture leading to a vocal cord hemorrhage. Especially in a woman, the blood vessel may be more prone to hemorrhage during her menstrual cycle.

This is a dangerous situation for a singer because of their regular voice use and need to use it forcefully. However with too much force, the blood vessel may suddenly rupture (even in the middle of a performance) resulting in a hemorrhage into the vocal lining itself causing a sudden and complete loss of voice. If a voice is present, it is much deeper than normal due to the additional "weight" of blood and edema (just like a violin string where the thicker the string, the deeper the pitch). There may even be mild pain associated with this occurrence.

To the right is a picture of a vocal cord hemorrhage. Note the entire vocal cord on one side (which is the patient's right side for those in the know) is brilliant red indicative of the presence of blood throughout the cord.

How is this treated?

Initially during an acute vocal cord hemorrhage, STRICT VOICE REST is mandatory. With continued voice use, the patient risks abnormal healing that may result in a vocal cord polyp or vocal cord scarring. Along with strict voice rest, steroids are often prescribed to help reduce the inflammatory swelling that often occurs as well as minimize risk of scarring.

Unfortunately, though such treatment may resolve the hemorrhage, it will typically not get rid of the culprit blood vessel.

For that, surgical intervention is required.

Such surgical intervention is much like trying to get rid of varicose veins in the leg.

One option is to precisely cut it out. Watch a video on this approach (video shows a vocal cord mass removal, but just pretend the mass is a blood vessel as the approach is identical).

The other option is use of a laser which is typically what I recommend. Why? It is relatively non-invasive and I feel the risk of scarring to be less compared with excision (though not zero). Shown below is a video of a vascular polyp being obliterated using a pulsed-dye laser (courtesy of Dr. Chandra Marie-Ivey). Another type of laser that may be used is a KTP laser.

Read more about laser treatment of vocal cord pathology here.


Read the Washington Post story here.
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