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Latest content about Tests

Bacteria in Urine: What It Means (& Possible Causes)

Bacteria in urine may result from specimen contamination or conditions like urinary tract infections. Urine microscopy helps confirm findings, while culture tests identify bacteria type and antibiotic sensitivity to guide diagnosis and treatment decisions.

Tests

Nitrites in Urine: What It Means & Treatment Options

Nitrites in urine may suggest a urinary tract infection when bacteria convert nitrate to nitrite. Covers type 1 urinalysis sample collection, why urine culture may be needed, common symptoms, who to see, and treatment options, including in pregnancy.

Tests

CPK Test: Why It's Ordered & What Results Mean

CPK test measures creatine phosphokinase, an enzyme released into the blood after muscle, heart, or brain injury. High levels may suggest heart attack, stroke, or muscle damage. Results are interpreted with other tests, and normal ranges vary by lab.

Doctor Says

How can I lower creatinine levels?

How to lower creatinine levels depends on restoring kidney filtration, since no specific medication directly lowers creatinine. Steps vary by cause: treat acute kidney failure triggers, manage diabetes and high blood pressure in chronic kidney failure, and use hemodialysis in severe cases with nephrologist guidance.

Doctor Says

Are high iron levels a sign of cancer?

High iron levels are usually not a sign of cancer, as they are more often linked to inflammation, liver conditions, or hereditary iron overload. This overview explains when high iron may warrant further testing, what common causes look like, and when to seek medical evaluation for persistent abnormalities.

Tests

GGT Blood Test: What It Is & How to Prepare

GGT blood test measures gamma-glutamyl transferase to help assess liver injury or biliary obstruction, which often elevates GGT. Levels can also rise with pancreatitis, heart attack, or cirrhosis and are read with AST, ALT, bilirubin, and ALP. Typical range: 7–50 IU/L; prep: 8-hour fast, no alcohol 24 hours.

Tests

Epithelial Cells in Urine: What It Means

Epithelial cells in urine often reflect normal shedding along the urinary tract and are usually not clinically relevant. Cell type can suggest the source, such as squamous cells from collection contamination. Counts (few/some/many), bacteria or mucus, and abnormal shapes may signal a UTI or kidney issues.

Tests

Hemoglobin A1c (HbA1C) Test: What It Tests & Normal Levels

The HBA1C test measures average blood glucose over three months by analyzing sugar bound to hemoglobin. It is a key tool for diagnosing prediabetes and diabetes, with standard normal levels below 5.7%. Because red blood cells live for 120 days, this test tracks treatment efficacy and health trends without fasting.

Tests

Hemoglobin Electrophoresis: Indications for Testing & How to Interpret Results

Hemoglobin electrophoresis is a blood test that identifies variant hemoglobins to help diagnose sickle cell anemia, hemoglobin C disease, and thalassemia. This overview explains how it’s done, when it’s ordered, and how age-based HbF, HbA1, and HbA2 results are interpreted, including newborn screening patterns.

Tests

Luteinizing Hormone (LH): What It Is, Normal Levels & Low/High

Leuteinizing hormone, also known as LH, plays a critical role in human reproductive health and fertility for both men and women. This comprehensive guide covers normal LH levels, the significance of the LH/FSH ratio in diagnosing PCOS, preparation for blood tests, and how this hormone regulates testosterone.

Tests

Vitamin D Test: Uses & What High or Low Levels Mean

Commonly known as 25(OH)D, the vitamin D test measures blood levels to diagnose deficiency or toxicity essential for bone health. Regular screening is key for risk groups like seniors or those with limited sun exposure. Results assist in managing calcium regulation and preventing skeletal disorders.

Tests

VLDL Cholesterol: Uses, Reference Values & Low or High Levels

VLDL cholesterol helps transport triglycerides and fats in the blood, but high levels can contribute to plaque buildup and increase the risk of heart disease. Learn what affects VLDL cholesterol, the health risks of elevated levels, and lifestyle changes that can help lower it.

Tests

Rubella IgG: Testing & What Results Mean (Reactive & Non-Reactive)

Rubella IgG is a blood test used to confirm immunity or detect past or recent rubella infection. Learn what reactive and non-reactive results mean, how IgG and IgM are interpreted together, and why this test is especially important during pregnancy.

Tests

ALT Blood Test: U.S. Normal Range & What High Levels Mean

The AST blood test measures aspartate aminotransferase levels to evaluate liver health and detect conditions like hepatitis, fatty liver disease, or medication-related damage. Learn what normal and high results mean, when the test is ordered, and how abnormal levels are treated.

Tests

Bilirubin in Urine: 11 Causes, Symptoms & What to Do

Bilirubin in urine is an abnormal finding that often signals liver or bile duct problems, such as hepatitis, cirrhosis, gallstones, or cholestasis. It can cause dark urine, jaundice, and itching, and treatment depends on addressing the underlying condition to restore normal bile flow.