💡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: For adults 60 and older, one RSV vaccine dose protects for at least two RSV seasons, so it is not a yearly shot. In babies, protection is much shorter: the maternal RSV vaccine helps protect a newborn for about 6 months, and the infant antibody shot lasts about

💡TL;DR: Non-rebreather masks are usually set at 10 to 15 L/min and can deliver about 60% to 90% oxygen when the mask fits well and the reservoir bag stays partly inflated. They are short-term emergency devices for people who are still breathing on their own, not

💡 TL;DR: Phlegm color can give clues, but it cannot diagnose an infection on its own. Clear or white mucus is often seen with normal irritation, allergies, or early viral illness, while yellow or green usually means your immune system is active, not that you automatically need antibiotics. Red, pink,

💡 TL;DR: Normal respiratory rate changes a lot by age. Newborns and infants often breathe 30 to 60 times per minute at rest, while teens and adults usually fall around 12 to 20. A number outside the usual range can matter, but breathing effort, color, and alertness often matter even

💡TL;DR: Pink frothy sputum usually means fluid is leaking into the lungs, and it often needs emergency care right away. It is most often linked to pulmonary edema from heart failure, but severe lung injury, pneumonia, or high altitude can also cause it. If it happens with shortness of

💡 TL;DR: For most healthy adults at sea level, a normal pulse oximeter reading is 95% to 100% SpO₂ and a normal resting pulse is 60 to 100 beats per minute. Readings in the low 90s can be worth rechecking, especially if your hands are cold or the clip is

Wheezing that shows up or gets worse when you lie down is a clue, not a diagnosis. It usually means something is narrowing your airways or making it harder for your lungs to work when your body is flat. 💡 TL;DR: Wheezing that gets worse when you lie down is