Learn cardiopulmonary pathology, including heart and lung diseases that affect airflow, gas exchange, circulation, and breathing.
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.
Fick’s Law of Diffusion and Pulmonary Gas Exchange
Learn Fick’s first law of diffusion and how it explains oxygen and carbon dioxide movement across the alveolar-capillary membrane.
Croup vs. Epiglottitis: Key Signs and Clinical Differences
Learn the key differences between croup and epiglottitis, including symptoms, airway signs, diagnosis, and treatment.
Emphysema vs. Chronic Bronchitis: Key Differences
Learn the key differences between emphysema and chronic bronchitis, including symptoms, lung damage, diagnosis, and COPD treatment.
Treating COPD Patients With Mechanical Ventilation
Learn how COPD is treated with mechanical ventilation, including NIV, ventilator settings, auto-PEEP, oxygenation, and weaning.
Laws and Principles of the Respiratory System
Learn about the laws and principles of the respiratory system, including pressure, flow, compliance, diffusion, and gas exchange.
Antimicrobial Agents: Types, Mechanisms, and Clinical Uses
Learn how antimicrobial agents treat infections, including antibiotics, antivirals, antifungals, resistance, and respiratory care uses.
Tasting Blood When Coughing: Causes and Warning Signs
Learn why you may taste blood when you cough, what causes it, when it may be serious, and which warning signs need medical care.
Sputum Evaluation: Color, Consistency, Odor, and Volume
Learn how to evaluate sputum color, consistency, odor, and volume to assess infection, airway clearance, and respiratory status.
Radiographic Findings: Key Signs in Respiratory Care
Learn radiographic findings, chest x-ray patterns, and key imaging clues used to assess lung conditions and guide respiratory care.
What Is Albuterol Made Of? Ingredients and How It Works
Learn what albuterol is made of, including its active ingredient and the components that help deliver this fast-acting asthma medication.
Bronchiectasis vs. COPD: What’s the Difference?
Learn the key differences between bronchiectasis vs. COPD, including their causes, symptoms, diagnosis, and treatment options.
Bronchiectasis vs. Bronchitis: What’s the Difference?
Learn the differences between bronchiectasis vs. bronchitis, including their causes, symptoms, and how each condition affects the lungs.
Sterilization vs. Disinfection for Medical Equipment Safety
Learn the key differences between sterilization and disinfection and how to safely process medical equipment based on infection risk.
Barotrauma in Mechanical Ventilation: Causes and Management
Learn what barotrauma is, its causes, signs, and how to prevent and manage this serious complication of mechanical ventilation.
Continuous Bubbling in the Water Seal Chamber
Learn what continuous bubbling in the water seal chamber means, including air leaks, chest tube problems, and troubleshooting tips.
Digital Clubbing: Causes, Signs, and Clinical Meaning
Learn what digital clubbing means, how to recognize it, and which chronic lung, heart, and systemic diseases it may suggest.
29 Early Warning Signs of Asthma You Should Never Ignore
Learn the early warning signs of asthma, including wheezing, coughing, chest tightness, shortness of breath, and when to seek care.
27 Early Warning Signs of COPD You Should Never Ignore
Learn the early warning signs of COPD, including shortness of breath, chronic cough, mucus, wheezing, fatigue, and when to seek care.
Top 10 Early Warning Signs of Pneumonia
Learn the early warning signs of pneumonia, including fever, cough, chest pain, shortness of breath, fatigue, and when to seek care.