Learn what crackles are, why they occur, and how to assess them to better identify respiratory conditions during patient evaluation.
John Landry, BS, RRT
John Landry is a registered respiratory therapist from Memphis, TN, and has a bachelor’s degree in kinesiology. He enjoys using evidence-based research to help others breathe easier, live healthier, and improve their overall quality of life.
Wheezing (Lung Sound): Overview and Practice Questions
Learn what wheezing means, how it’s produced, and what conditions cause it to improve respiratory assessments and clinical decision-making.
Is COVID-19 Making a Comeback in 2026?
Learn why COVID-19 cases are rising again in 2026, what is driving the surge, and how to stay protected during the new seasonal comeback.
Sternum: Overview and Practice Questions (2026)
Learn what the sternum is, how it supports breathing, and why it’s an essential structure for respiratory therapists and patient care.
Pharynx: Overview and Practice Questions (2026)
Learn what the pharynx is, its structure and function, and why it’s important in respiratory care, especially for respiratory therapists.
Laminar vs. Turbulent Flow in the Lungs: An Overview (2026)
Explore the differences between laminar and turbulent flow in the lungs, and their roles in respiratory physiology and airway mechanics.
Where Are the Lungs Located? (2026)
Discover where the lungs are located, how they function, and why their position in the chest is vital for breathing and overall health.
Do Cough Drops Have Alcohol in Them? (2026)
Learn whether cough drops contain alcohol, why it’s sometimes added, and how to choose safe alcohol-free options for soothing throat relief.
How Long Does it Take for Your Lungs to Heal From Vaping?
Learn how long it takes for your lungs to heal after quitting vaping, what improves first, and how to support better lung recovery.
Hemoglobin: Overview and Practice Questions (2026)
Learn what hemoglobin is, how it carries oxygen and carbon dioxide, and why it’s essential in respiratory care.
Laryngoscope: Overview and Practice Questions (2026)
Learn about the laryngoscope, its types, uses in intubation, and why it’s essential for airway management and respiratory therapists.
Respiratory Care Week Ultimate Guide (2026)
Celebrate Respiratory Care Week by honoring respiratory therapists and raising awareness about the importance of healthy lungs.
Cardiac Output: Overview and Practice Questions (2026)
Learn what cardiac output is, how it affects oxygen delivery, and why it matters in respiratory therapy and patient care.
Dyspnea: Overview and Practice Questions (2026)
Learn what dyspnea is, its causes, and why recognizing shortness of breath is vital in respiratory therapy and patient care.
Cricothyrotomy vs. Tracheostomy for Airway Management (2026)
Learn the key differences between cricothyrotomy and tracheostomy, including purpose, procedure, and when each is used.
Cricothyrotomy: Overview and Practice Questions (2026)
Learn what a cricothyrotomy is, when it’s performed, and why it’s vital in emergency airway management and respiratory care.
Diaphoresis: Overview and Practice Questions (2026)
Learn what diaphoresis is, its causes, and why recognizing this sign is vital for respiratory therapists in patient care.
15 Signs of Dying from Esophageal Cancer (2026)
Recognize the signs of dying from esophageal cancer and learn how to provide comfort, care, and support in the final stages.
Cardioversion: Overview and Practice Questions (2026)
Learn how cardioversion restores normal heart rhythm and why it’s important in managing arrhythmias in respiratory care.
Capillaries: Overview and Practice Questions (2026)
Learn how capillaries enable gas exchange, support circulation, and play a vital role in respiratory care and overall health.