Why is a Tube In My Throat For Surgery?

Why a Ventilator May Be Necessary During Surgery

It's a common question--why do I have to have a tube in my throat and be on a ventilator during surgery?

The answer is pretty simple, general anesthesia paralyzes the body and renders the patient unconscious. When I say paralyze, I mean the vast majority of the muscles in the body are unable to move. The heart is one exception, as it will continue to beat on its own throughout the surgery, but the diaphragm, the muscle that makes it possible to fill the lungs with air, is unable to move.

If the muscles that help fill the lungs can't move, then you are unable to breathe.

In order to perform surgery without feeling the pain, anesthesia must be used.  The patient must also continue to breathe, so the breathing must continue during the procedure.  The ventilator makes that process happen. 

If you have ever gotten the "wind knocked out of you" and have that scary feeling of not being able to take a breath, then you've experience a very brief paralysis of the diaphragm muscles.  

To make surgery possible, the lungs have to be filled with air so they can do their job. This is accomplished by putting a tube, called an endotracheal tube, into the mouth and down into the airway of the patient, a process called intubation. The end of the tube that is left outside of the mouth is connected to a ventilator, which provides breaths to the lungs. The lungs continue to function normally, but the ventilator does the work of the paralyzed muscles and makes the lungs inflate and deflate.


Once the surgery is over and the anesthesia has worn off, the tube is removed and the muscles of the body return to their normal function. In some cases, patients may need more time until they are ready to breathe on their own, but in most cases, you can expect to be breathing on your own before you leave the operating room.

 Heart surgeries are a known exception, for these surgeries anesthesia is allowed to slowly wear off during the hours after surgery.  Once the patient is awake enough to breathe on their own, the breathing tube is removed. 

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