Dr. Seth Evans

Ear, Nose, Throat, & Allergy Specialist in Central Texas

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Surgery of the Month: Thyroidectomy

June 26, 2014 by Dr. Evans Leave a Comment

I think I may have skipped a month on the “surgery of the month” series, but we’ll get back into it this month!  The topic today is thyroidectomy, or removal of the thyroid gland.  Removal of half of the thyroid gland is called hemithyroidectomy (or thyroid lobectomy sometimes), whereas removal of all of the thyroid is called total thyroidectomy.

You can remind yourself of what the thyroid gland is and where it is located by reading my post on thyroid nodules HERE.

Many thyroid disorders can be treated entirely with medications, especially hypo- and hyperthyroidism (meaning the thyroid makes too little or too much hormone, respectively).  Surgery to remove part or all of the thyroid is most commonly necessary in the case of thyroid cancer or large benign nodules which are causing symptoms such as pressure sensation, difficulty swallowing, or shortness of breath.

For any thyroid cancer, the first order of treatment is total thyroidectomy.  Even if a tumor is only in one side of the gland, it is important to remove the entire thyroid because small areas of tumor are common in other parts of the gland.  For benign nodules limited to one side, hemithyroidectomy is preferred so that the patient will still have a functioning lobe on the other side and thus won’t need to take thyroid replacement medication for the rest of their life.

So, how is the surgery done?  I make a horizontal incision in the lower neck in a skin crease.  The incision is carried down to the muscle layer overlying the larynx and thyroid gland, which is then divided vertically.  At this point, the thyroid isthmus is visible crossing in front of the trachea.  I’ll then dissect around the periphery of the thyroid gland, taking care to divide and cauterize any blood vessels.  On the back side of the gland, there are fibrous attachments to the trachea called Berry’s ligament which must be divided carefully.  After this is done, the entire lobe can be removed.  For total thyroidectomy, the process is repeated on the other side.  I’ll then close the incision after verifying there is no bleeding in the area where the thyroid was sitting.

The two specific risks in thyroid surgery are injury to the parathyroid glands or to the recurrent laryngeal nerve.  There are 4 parathyroid glands which are rice-sized structures which live in the tissue behind the thyroid.  They produce parathyroid hormone which helps regulate calcium levels in the blood.  The recurrent laryngeal nerve provides innervation to the vocal cord on that side, and can cause hoarseness and swallowing problems if injured.  I take care to visually identify and preserve these important structures while dissecting around the thyroid gland.

After surgery, most patients can go home the same day.  For total thyroidectomy patients, I will have a calcium blood level checked in the recovery room after surgery and then again the following morning (the patient goes to a local lab to have the blood drawn).

The recovery after surgery is usually not terrible.   Patients usually have a moderate level of pain for several days after but this mostly resolves within a week.  The scar tends to heal very well and usually blends in nicely with the natural creases in the neck.

Should smokers switch to E-cigarettes?

June 19, 2014 by Dr. Evans Leave a Comment

I read an interesting article (read it HERE) a few months back about E-cigarettes and I wanted to put up some comments about the article and E-cigarettes in general.

E-cigarettes are devices that were invented by a Chinese pharmacist in the early 2000s.  They look very similar to normal cigarettes, but instead of burning tobacco to produce smoke, they use electric energy to vaporize a nicotine-containing fluid that the user will then inhale.  Taking a drag on the E-cigarette triggers the device to vaporize the fluid inside.

Proponents of E-cigarettes claim that they are much safer than regular cigarettes and do not expose users to toxic chemicals and carcinogens.  Other touted benefits include the ability to “smoke” them indoors where smoking is typically banned and also as a potential way to help people quit smoking regular cigarettes.

Opponents are concerned about the true safety of the inhaled vapor, and also are concerned that the E-cigarettes may be a “gateway drug” that will lead people to start smoking regular cigarettes as well.

What does the evidence say?  Well, so far, it’s inconclusive.  A recent meta-analysis (a published study that analyzes multiple other studies on the same topic) published in the journal Circulation sheds some light on the issue.  You can read the summary HERE.  Be aware that one of the authors is Dr. Stanton Glantz, who was mentioned as a “pessimist” about E-cigarettes the NY Times article, so the overall tone of the Circulation paper highlights the risks more than potential benefits.

What is my opinion?  First, I agree that more research needs to be done on the subject, and we may still find out that E-cigarettes pose a serious and so far unknown risk to users.

However, regular cigarettes are so terrible for our health.  I think most people would agree that tobacco use is the greatest preventable health problem in the world.  How many heart attacks, strokes, lung problems, and cancers could be prevented, and how many more years of life could be had if every smoker in the world suddenly quit?

For this reason alone, I would say I’m an optimist on E-cigarettes until proven wrong.  Yes, they do emit some harmful chemicals, but those chemicals are at a 100-fold lower level than in conventional cigarettes.  And yes, maybe there are some health risks, but we KNOW that regular cigarettes are possibly the most unhealthy thing anyone can do.

One piece of data from the Circulation article that jumped out at me was when they looked at a group of former smokers who started using E-cigarettes.  After 1 year, only 6% of them had resumed smoking, and 92% continued using only E-cigarettes.  I think that at least 6% (if not quite a bit more) of former smokers would restart smoking anyway in a 1 year time frame, so it seems likely that E-cigarettes are not driving people back to smoking.

In an ideal world, everyone would stop using any cigarettes (electronic or otherwise), but in the real world that we live in, I’d be thrilled if more people smoke E-cigarettes and sales of tobacco keep dropping.

 

How to be an ENT

June 5, 2014 by Dr. Evans Leave a Comment

So you wanna be an ENT?  Or at least you might be interested in how I was trained to be an ENT doctor?  In today’s post, I’ll talk about how a person goes from high school graduate to fully trained otolaryngologist (that’s the official name of my specialty).

Well, from start to finish, it usually takes a minimum of 13 years for Americans to go from high school graduation to completing ENT residency.  That (long) amount of time can be divided into 4 years of college, 4 years of medical school, and 5 years of ENT residency training.  Some folks will further subspecialize by doing fellowships which add an additional year or two after their residencies.

The first step is getting through college and doing well enough to be accepted into medical school.  Premed students can major in whatever they want, but they all must complete at the very minimum 1 year each of biology, general chemistry, organic chemistry, and physics.  People who decide on a career in medicine after graduating from college can complete special premed post-baccalaureate programs where they can complete these required classes in a 12-18 month period before applying to medical school.

Once you are in medical school, you’ll spend 4 years there.  Traditionally, the first two years were spent in the classroom learning the basic science foundations of medicine and then the final two years working and learning on the hospital wards.  Many medical schools are mixing things up more in recent years and getting their students to see patients much earlier than in the past.

At my medical school, Emory University, the curriculum was still fairly traditional when I was there.  The first two years were fairly grueling and required a lot of studying.  The third year was my favorite year of medical school, when I rotated through internal medicine, surgery, OB/Gyn, pediatrics, psychiatry, family medicine, and various other rotations.  The fourth year is actually the easiest year of med school- most of your time is spent applying for residency and doing elective rotations.

In March of their fourth year, all medical students find out where they will be spending the next 3-7 years on residency match day.  I was fortunate to have matched in ENT at VCU medical center in my home state of Virginia.

It is interesting that even though newly-graduated doctors learn a TON of stuff in medical school, they are totally unprepared to practice medicine.  This is why we all have to spend the next few years in residency training.  Residencies are as short as 3 years (internal medicine, pediatrics, among others) and as long as 7 years (neurosurgery).  Most surgical specialties are 5 years, including ENT.

The first year of residency is also known as the internship year.  The main goal of the surgical internship is to learn to manage the common problems of surgical patients in the hospital and to start learning the basics of surgery (suturing and minor procedures).  As an intern, most of your time is spent answering pages from nurses, taking care of routine issues, and doing paperwork.  Although it is a terrifying transition from student to intern, the job gets pretty easy after a few months.  It is mostly grunt work, and there are plenty of people above you in the hierarchy to call when there are more complicated problems.

During my intern year, I spent most of my time rotating through various surgical rotations including general surgery, trauma, neurosurgery, plastic surgery, and surgical oncology.  I also spent time in the emergency room and on the anesthesia service.

After completing intern year, I had 4 more years of residency training devoted entirely to otolaryngology (ENT).  Throughout the residency, I usually spent about half of each week seeing patients in the office and half in the operating room.

In the office, I would typically see a patient and then present that patient’s story and exam findings as well as my preliminary diagnosis and plan to my boss (the “attending physician”). The attending would then go see the patient as well and determine the final plan.  As I progressed through residency, I would get more and more autonomy.

In surgery, I would typically do procedures that were suitable for my level of training and sometimes assist more senior residents on more complicated surgeries.  We were always supervised by an attending physician, who (depending on our skills and their trust in us) could be scrubbed in next to us or out in the surgeon’s lounge with a coffee.

In the first years of residency, the main surgeries I learned were smaller procedures such as ear tubes, tonsillectomies, adenoidectomies, septoplasties, and laryngoscopies.  As my training progressed, I moved to more advanced procedures such as endoscopic sinus surgery, neck mass excisions, and microlaryngeal excisions.  In my final year, I routinely performed major cancer resections, cochlear implants, thyroidectomy, and parotidectomy, as well as plastic and reconstructive procedures.

The road is long but overall, I enjoyed my time in training.  I continue to learn in practice and I plan to keep on learning for the rest of my career.

 

Ever had a cough that won’t go away?

May 1, 2014 by Dr. Evans Leave a Comment

cough

Everyone gets a cough every now and then, usually during colds and other minor illnesses.  Some people, however, have chronic cough, which is defined as a cough that lasts over 8 weeks in adults, or 4 weeks in children.  Most people with chronic cough have tried the usual over the counter remedies such as Robitussin and have not gotten any relief.

Chronic cough can be caused by a large list of possible problems.  The majority of chronic cough, however, is caused by one or a combination of these 4 problems:

  • Nasal allergies causing postnasal drip into the throat
  • Acid reflux from the stomach into the throat
  • Asthma
  • Smoking

When I evaluate a new patient with chronic cough, I first talk to them and ask about any history of these problems and also ask about common associated symptoms, especially acid reflux symptoms.  On physical exam, I will examine the back of the throat and the voice box using a thin flexible endoscope that I can pass through the patient’s nose.  There are classic signs of acid reflux that can be seen in the throat using the flexible endoscope- typically swelling in the back half of the voice box and “cobblestone” appearance of the back wall of the throat.

Once I’ve made a full evaluation, I will plan to treat any of the underlying problems (allergies, asthma, and/or reflux) with medication and will instruct any smokers to quit.  If people continue smoking, they cannot expect that their cough will ever get better.

I will usually see patients back a few weeks later, and a lot of them get better.  However, some do not.  These patients may need adjustment of their medication doses, but I will usually at this point consider the possibility of more unusual diagnoses such as neurogenic cough or lung disorders.

Neurogenic cough is a chronic cough caused by abnormal nerve activity to the voice box.  Patients will usually complain of a constant tickle in the throat with recurrent spells of dry coughing.  There are medications that can successfully suppress this type of cough.  These include tramadol (a type of pain medication), gabapentin (also used for nerve pain and seizure prevention), and nortriptyline (also used for migraine prevention and as an antidepressant).

If I have suspicion for any lung problem, I will order a chest X-ray and possibly refer the patient to a pulmonary specialist at this point.

Chronic cough can be a very difficult problem to deal with, but fortunately most patients can be treated successfully once their underlying issue is diagnosed and dealt with.

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Contact Info

Email: drevans@texanent.com

Phone: 512-550-0321

Practice Website: texanent.com

Categories of Posts

Ear General Health Miscellaneous Neck Nose/Sinus Personal Updates/About Me Surgery/Procedure Throat/Mouth Uncategorized

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