Anatomy
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What Is the Thoracic Duct?

Malcolm Tatum
Malcolm Tatum
Malcolm Tatum
Malcolm Tatum

The thoracic duct is a vessel that functions as the means of collecting and channeling lymph from parts of the body found below the diaphragm. In addition, this duct also collects lymph from the upper left side of the body. It empties into the venous system, specifically at the point where the left internal jugular vein and the left subclavian meet.

Thoracic duct drainage is key to the proper function of the body. In the event that a problem arises to interfere with the drainage process, a number of health issues can arise. This is because the drainage of lymph through the duct helps to cleanse the cells of the body. When this process is not taking place, the potential for the collection of lymph at the point of obstruction can result in the creation of malignancies at various locations throughout the upper left portion of the body or the area below the diaphragm. Depending on the nature of the growth, the individual may suffer a wide range of symptoms, including fevers, nausea, or difficulty breathing.

The largest lymph vessel in the body,  the thoracic duct is responsible for returning excessive fluids back into the body’s circulation.
The largest lymph vessel in the body, the thoracic duct is responsible for returning excessive fluids back into the body’s circulation.

Damage to the duct usually comes about due to trauma sustained in an accident or as a by-product of a surgical procedure that takes place in the general area of the duct. In both instances, one or more sections of the duct can collapse or become clogged, effectively shutting down the drainage process. When clogging occurs, the condition is often referred to as chylothorax. If not treated in a timely manner, the blockage can and often does cause additional health issues.

If the thoracic duct does not drain properly, it could cause a variety of symptoms, including nausea.
If the thoracic duct does not drain properly, it could cause a variety of symptoms, including nausea.

One means of dealing with blockage of the thoracic duct is by utilizing a treatment known as thoracic duct ligation. This is especially helpful in situations where the blockage came about due to a previous surgical procedure. In recent years, some physicians have recommended utilizing this treatment as a precaution to a possible blockage due to some other surgery. For example, the ligation may take place at the same time the patient undergoes an oesophagectomy, an action that minimizes the chance of blockage occurring in the duct during the recovery period.

The thoracic duct empties into the venous system, specifically at the point where the left internal jugular vein and the left subclavian meet.
The thoracic duct empties into the venous system, specifically at the point where the left internal jugular vein and the left subclavian meet.

Ligation may also be used to drain a clogged thoracic duct in the event of an accident. Many physicians recommend that this procedure be used if the thoracic duct does not respond to other modes of treatment within forty-eight hours of the diagnosis of the injury. When performed as early as possible, the chances of severe health issues up to and including death taking place are significantly lessened.

Malcolm Tatum
Malcolm Tatum

After many years in the teleconferencing industry, Michael decided to embrace his passion for trivia, research, and writing by becoming a full-time freelance writer. Since then, he has contributed articles to a variety of print and online publications, including TheHealthBoard, and his work has also appeared in poetry collections, devotional anthologies, and several newspapers. Malcolm’s other interests include collecting vinyl records, minor league baseball, and cycling.

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Malcolm Tatum
Malcolm Tatum

After many years in the teleconferencing industry, Michael decided to embrace his passion for trivia, research, and writing by becoming a full-time freelance writer. Since then, he has contributed articles to a variety of print and online publications, including TheHealthBoard, and his work has also appeared in poetry collections, devotional anthologies, and several newspapers. Malcolm’s other interests include collecting vinyl records, minor league baseball, and cycling.

Learn more...

Discussion Comments

anon296835

What is the function of a thoracic duct?

anon275077

I'm studying surgery now, and my book is pretty lame as far as technical stuff is concerned. When the thoracic duct is ligated, what happens to those to ends? Are they 'implanted' to drain elsewhere? and where?

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    • The largest lymph vessel in the body,  the thoracic duct is responsible for returning excessive fluids back into the body’s circulation.
      By: designua
      The largest lymph vessel in the body, the thoracic duct is responsible for returning excessive fluids back into the body’s circulation.
    • If the thoracic duct does not drain properly, it could cause a variety of symptoms, including nausea.
      By: Piotr Marcinski
      If the thoracic duct does not drain properly, it could cause a variety of symptoms, including nausea.
    • The thoracic duct empties into the venous system, specifically at the point where the left internal jugular vein and the left subclavian meet.
      By: stockshoppe
      The thoracic duct empties into the venous system, specifically at the point where the left internal jugular vein and the left subclavian meet.