Respiratory Therapist/Spirometry?


Hi! I'm 25 years old. I was on a spirometry few years ago and my FEV1/FVC was 79% if I remember correctly. I have somewhat big tonsils and I'm going to the surgery as soon as I can. My question is: Can big tonsils somehow affect the result of spirometry? I think the machine said that I have very mild obstruction 'cause the lowest reference value for normal lungs were 80%. My doctor said that I don't have an obstruction even when the machine said that I do, because my other values were good if I remember correctly. Do I have an obstruction or not.. or can this result be do to a bad blowing technique or my big tonsils? I have smoked for maybe 10 years on and off and might have exercise-induced bronchoconstriction.



Very interestging question! The short answer is "No"... the 79% is related to the lungs and  lower airways, and not so much the back of the throat. Large toncils WILL contribute to things like Sleep Apnea, snoring, etc. but should not have any real affect on Spirometry values.  

Respiratory Therapist

All Answers

Answers by Expert:

Ask Experts


Larry W. Wical, BA-RRT


I CAN answer: ALL questions and queries related to the following topics... - Oxygen - Asthma - COPD - Bronchitis - Emphysema - Pneumonia (Viral/Bacterial) - Tuberculosis (TB) - SARS - Influenza (Flu) - Vaccines - Pulmonary Embolism - Pleural Effusion - Atelectasis - Inhalation injuries (burns, chemicals, etc.) - PFTs - Cardiovascular health - Sleep Apnea - BiPap/CPAP - Ventilators ("Respirators") - Aspiration injuries - Thoracic injuries - Lung contusions - Tracheal injuries - Artificial Tracheostomy - Secretions - Prolotherapy/Regenerative Injection Therapy (RIT): A patient's experience/perspective - General health and fitness I CANNOT answer: Questions that vary too far from my primary scope of pulmonary and cardiovascular care and fitness. I promise to be open and honest about my knowledge of submitted topics, and will always openly provide my personal as well as professional feedback as it relates.


Registered Respiratory Therapist (RRT, RCP) since 2005. I have worked primarily in the acute care, critical care, burn care and home care settings.

NBRC - National Board of Respiratory Care AARC - American Association of Respiratory Care

-All About Kids Magazine -The Clermont Sun -Cincy Sports & Fitness Magazine -Many online Fitness and Health blogs and "webazines"

- B.A. in Communication (1997) - A.A.S. in Respiratory Science (2005) - RRT license (state of OH, KY and IN) - Basic Life Saving (BLS) - Advanced Cardiovascular Life Support (ACLS) - Advanced Burn Life Support (ABLS)

Past/Present Clients
Currently work in the city's largest academic/research hospital.

©2017 All rights reserved.