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Does Ultrasound Use Radiation? The Facts
Ultrasound uses sound waves, not radiation, making it a safe choice for pregnancy and kids. Here’s how it works and what it can and can’t detect.
Is Nuclear Medicine the Same as Radiology?
Nuclear medicine and radiology both use imaging, but they work differently and serve different purposes. Here’s how to tell them apart.
How to Calculate Plasma Volume From Hematocrit
Learn how to calculate plasma volume from hematocrit, including correction factors, body position effects, and when direct measurement is needed.
How to Take a Rapid Flu Test and Read Your Results
Learn how to use a rapid flu test at home, read your results correctly, and understand what those lines actually mean for your health.
How to Test for HPV in Women and What Results Mean
Learn how HPV testing works in women, when to get screened, and what a positive result actually means for your health.
How to Check Body Temperature: Methods by Age
Learn which thermometer method is most accurate for your child’s or your own age, plus what temperature actually counts as a fever.
How to Get Tested for Hypothyroidism: TSH and More
Learn which blood tests check for hypothyroidism, from TSH to antibody panels, and how to talk to your doctor about your symptoms.
What Is Ballottement? Knee, Pregnancy, and Kidney Uses
Ballottement is a hands-on clinical technique used to detect fluid around the knee, check fetal position, and examine the kidneys.
How Long Should You Wait to Read an Ovulation Test?
Reading an ovulation test at the right time matters more than you might think. Learn when to check results and how to avoid common reading mistakes.
Will Melatonin Cause You to Fail a Drug Test?
Melatonin won’t cause a failed drug test, but contaminated supplements might. Here’s what you should know before your next screening.
What Angle for Venipuncture? 15 to 30 Degrees
The standard venipuncture angle is 15 to 30 degrees, but vein depth, needle type, and patient age all influence what works best in practice.
Are Pap Smears Required or Just Recommended?
Pap smears are recommended, not required—but here’s what the guidelines say about when to start, how often to go, and when you can stop.
How Retinal Detachment Is Diagnosed: Exams & Signs
Learn how eye doctors diagnose retinal detachment, from dilated exams and ultrasound to why macula status matters for your outcome.
What Is an Anomaly Scan: Checks, Timing and Results
An anomaly scan checks your baby’s development around 20 weeks. Learn what it looks at, how accurate it is, and what happens if something unusual is found.