Work Issues… Anxiety… Depression…


Snoring Can Be the sign of serious health problems.


Allergy, Asthma, Emphysema, Lung Cancer Detection

There’s really nothing like a breath of fresh air and a good night’s sleep.  Deprived of either, a person’s daily functions, health and quality of life can quickly deteriorate.  At Tennesse Comprehensive Lung and Sleep Center, Dr. Clyde Southwell has made it his mission to help Sumner County rest and breathe easier. As far as we know, we are the only sleep center in this area that has been accredited by the American Academy of Sleep Medicine. We want the public to know that they are getting the very best treatment available when they come to our facility.


“Whether it’s shortness of breath, coughing, or wheezing we can help!” says Dr. Southwell. TCLS is able to diagnose and treat a wide variety of pulmonary disorder such as asthma, emphysema, interstitial lung disease and pulmonary artery hypertension.  Our in-office evaluation includes pulmonary function testing as well as cardiopulmonary exercise testing (CPET).

We are located @ 102 Wessington Place
(The corner of New Shackle Island and Wessington Place)
Hendersonville, TN 37075
615-822-2214 Office • 615-822-6519 Fax


Katherine Stanfill, MSN, FNP-C,


Katherine grew up in Hendersonville, TN. She received her Bachelor of Science in Nursing from Belmont University and Master of Science in Nursing from Tennessee State University.  Katherine is now a Board Certified Family Nurse Practitioner. She is a member of Sigma Theta Tau International Honor Society of Nursing. She began her career in health career by working as a Registered Nurse at Vanderbilt University Medical Center in the Burn Center. She worked there for seven years with a variety of patients including burn, trauma, critical care, and pediatrics. Katherine joined the Tennessee Comprehensive Lung and Sleep Center family in 2017.

Katherine is married to Jacob and they have a son, Luke. Katherine enjoys spending time with her family, being on the lake, and spending time with her dogs, Lady and Tink.

Tennessee Comprehensive Lung and Sleep Center

Contact Us

4 + 8 =

Home Sleep Test Instructions

Alice NightOne – Designed to provide it all – ease, confidence, and reliability