Home health monitoring
Device accuracy, fit, test limits and when to seek clinical confirmation.
Pick a guide below. Each one explains what to look for and how to use the product safely. It also says when to ask a doctor or other expert first. Sources are listed at the end of every guide.
Guides in this section
More guides
A1C Home Test: What It Shows, Ranges and Its Limits
A1C home tests explained: what A1C measures, normal, prediabetes and diabetes ranges, why home results are not a…
At-Home Vitamin D Test: Who Needs One and What Levels Mean
At-home vitamin D tests explained: what the 25(OH)D test measures, nmol/L and ng/mL levels, who is at risk of low…
Basal Body Thermometer: How to Track Ovulation by Temperature
Basal body thermometer guide: how BBT shows ovulation, taking your temperature before getting up, charting the small…
COVID and Flu Home Test: When to Test and How to Read Results
COVID and flu home test guide: FDA repeat-testing rules, when to test after exposure, what a negative does and does not…
Cholesterol Test Kit: How Home Tests Work and What Numbers Mean
Home cholesterol test kits explained: total vs lipid panel kits, accuracy and CDC traceability, fasting, healthy levels…
Digital Thermometer: Oral, Rectal or Armpit and Reading a Fever
Digital stick thermometer guide: oral, rectal and armpit use, wait times, how readings compare, what counts as a fever…
Ear Thermometer: How to Use One and How Accurate It Is
Ear thermometer guide: how infrared ear thermometers work, Braun's steps with lens filters, fixing position errors…
Forehead Thermometer: How to Use a No-Touch Thermometer Right
Forehead thermometer guide: how non-contact infrared thermometers work, FDA tips for accurate readings, room and…
Glucose Meter Kit: What to Compare and How to Test at Home
Glucose meter kits explained: what the FDA says to compare, test strips and lancets, accurate fingertip testing…
Home ECG Monitor: What It Can Show and What It Cannot
Home ECG monitors explained: how personal EKG devices compare with clinic EKG, Holter and event monitors, FDA rules for…
Ketone Meter: Blood vs Urine Ketone Testing at Home
Ketone meters explained: how blood ketone meters and urine strips work, who needs ketone checks, DKA warning signs…
Ovulation Test Strips: When to Start Testing and How to Read Them
Ovulation test strips explained: how LH tests work, when to start testing for your cycle length, reading a positive…
Peak Flow Meter: How to Use It, Personal Best and Zones
Peak flow meter guide: the NHLBI steps for an accurate reading, finding your personal best, green, yellow and red…
Pulse Oximeter: How to Read It, Accuracy Limits and When to Call
Pulse oximeter guide: what SpO2 numbers mean, the 92% and 88% thresholds, what affects accuracy, how to take a reading…
Stethoscope Guide: Classic vs Cardiology, Fit, Cleaning and Care
Stethoscope guide for students, nurses and caregivers: Littmann Classic III vs Cardiology IV, pediatric sizes, eartip…
UTI Test Strips: How Home Tests Work and When They Miss
At-home UTI test strips explained: nitrite and leukocyte pads, how to test, why a negative can be wrong, what…
Upper Arm Blood Pressure Monitor: Cuff Size, Accuracy and Use
Upper arm blood pressure monitor guide: why experts prefer upper arm cuffs, how to size the cuff, checking a validated…
Urine Test Strips: What Each Pad Checks and How to Read Them
Urine test strips explained: what protein, blood, nitrite and ketone pads show, collecting a clean sample, false…
Vision Test Chart: How to Check Visual Acuity at Home
Vision test charts explained: how a Snellen eye chart works, what 20/20 and 20/40 mean, 20 vs 10 foot charts, near…
Low-Dose Aspirin (81 mg): USPSTF Advice, Bleeding and Labels
Low-dose aspirin explained: what the USPSTF 2022 recommendation says by age, why bleeding risk matters, the Bayer 81 mg…