Learn about theophylline, including its respiratory uses, mechanism of action, side effects, toxicity risks, and monitoring needs.
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.
Volutrauma: Causes and Risks During Mechanical Ventilation
Learn what causes volutrauma, why it occurs during mechanical ventilation, and how lung-protective strategies help reduce injury.
Inverse Ratio Ventilation (IRV): Benefits, Risks, and Uses
Learn how inverse ratio ventilation (IRV) improves oxygenation, when it is used, and why auto-PEEP and hemodynamic risks must be monitored.
Intrapulmonary Shunting: Causes, Effects, and Treatment
Learn about intrapulmonary shunting, how it causes refractory hypoxemia, common causes, assessment clues, and treatment with PEEP.
Intrapulmonary Percussive Ventilation (IPV): Clinical Guide
Learn what intrapulmonary percussive ventilation (IPV) is, how it works, and when it is used for airway clearance and secretion removal.
Intercostal Space: Functions and Clinical Landmarks
Learn what intercostal spaces are, including their anatomy, clinical landmarks, role in breathing, and importance in procedures.
Inspiratory Flow Rate: Clinical Guide for Respiratory Care
Learn what inspiratory flow rate means, how it affects ventilation, I:E ratio, air trapping, patient comfort, and aerosol delivery.
Inhaled Anti-Infective Agents: Types, Mechanisms, and Uses
Learn about inhaled anti-infective agents, including uses, delivery methods, safety concerns, and respiratory care considerations.
Humidification Therapy: Uses, Devices, and Hazards
Learn how humidification therapy protects the airway, supports secretion clearance, and helps prevent complications during oxygen therapy.
Humidity and Bland Aerosol Therapy in Respiratory Care
Learn about humidity and bland aerosol therapy, including indications, devices, secretion management, and the most common hazards.
Cardiogenic Pulmonary Edema: Symptoms and Management
Learn about cardiogenic pulmonary edema, including causes, symptoms, diagnosis, oxygen therapy, CPAP, BiPAP, and treatment.
Cardiopulmonary Pathology: Diseases of the Heart and Lungs
Learn cardiopulmonary pathology, including heart and lung diseases that affect airflow, gas exchange, circulation, and breathing.
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.