Comparisons

💡TL;DR: Venturi masks deliver a fixed oxygen level, usually about 24% to 60%, by pairing each color-coded adapter with a set flow rate. Lower settings can create very high total flow, which helps keep FiO₂ steady even when breathing changes. This matters most when oxygen must be controlled

💡TL;DR: Most home pulse oximeters cost about $20 to $60, while FDA-cleared medical-grade options often run $150 or more. For quick home spot checks, a reputable fingertip model is usually enough, but readings can be thrown off by cold hands, motion, nail polish, and low blood flow.

💡TL;DR: Hemoptysis = blood with a cough from the lungs; hematemesis = blood with vomiting from the stomach or esophagus. Look for bright, frothy blood in mucus during a cough versus dark coffee‑ground or bright red blood mixed with food after nausea. Any vomiting of blood warrants emergency care; coughing

💡TL;DR: Epiglottitis is a sudden, bacterial throat infection that can block the airway within hours and needs emergency care, while croup is a common viral illness with a barky cough that usually improves in 3–4 days with calm care and a single steroid dose from your doctor. Look

💡TL;DR: Most sore throats are viral and get better in a few days; only about 5–15% of adults and 20–30% of children have strep (CDC). Strep usually starts suddenly with severe throat pain and fever and no cough, while viral sore throats build more slowly with cough

💡TL;DR: Croup = a barky upper‑airway cough that peaks over 1–2 nights, RSV = a wet cough with wheeze that runs about 1–2 weeks, and whooping cough = long coughing fits with a whoop that can last for weeks. Nearly all children encounter RSV by age 2 (CDC), while

💡TL;DR: Rhonchi are low, snoring-like sounds from mucus in the larger airways and often clear after a cough. Crackles (rales) are brief popping sounds from fluid or stiff air sacs and usually do not clear; wheezes are high, musical whistles from narrowed small airways. Use lung sounds as

💡TL;DR: RSV and whooping cough are different illnesses: RSV is a virus, while whooping cough (pertussis) is a bacterium. Antibiotics treat pertussis (especially early) but not RSV; RSV care is mainly supportive at home or in the hospital if breathing is hard. Protection also differs: DTaP/Tdap prevents pertussis,

What Is Croup? Croup is a viral swelling of the upper airway around the voice box and windpipe. The narrowed airway causes a barking, seal-like cough. Kids can also make a harsh, high-pitched noise on the inhale called stridor. Croup usually starts like a cold, then gets louder