Creatinine Clearance

Creatinine is a waste product produced by muscle metabolism and filtered by the kidneys into urine. This test measures creatinine in an 8-hour urine collection and reflects kidney filtration function. Creatinine levels help assess kidney health and are often used to calculate glomerular filtration rate (GFR), which indicates how well your kidneys filter waste. Low creatinine output may suggest reduced muscle mass or kidney disease, while the ratio of protein to creatinine helps assess kidney protein loss. This test is frequently ordered in patients with diabetes, high blood pressure, or known kidney disease.

This test identifies specific mutations in the EGFR (epidermal growth factor receptor) gene from blood or tissue samples. EGFR mutations are commonly found in certain lung cancers and can determine which targeted therapies will be most effective. Different mutations respond differently to specific medications called EGFR inhibitors. Testing for EGFR mutations is crucial for cancer patients to guide treatment selection, predict drug response, and optimize outcomes. This genetic information helps oncologists personalize cancer treatment plans.

This test measures creatinine clearance during dialysis by comparing creatinine levels in dialysis fluid versus blood. It assesses how effectively dialysis is removing uremic toxins—a key measure of dialysis adequacy. Adequate creatinine clearance ensures proper removal of metabolic waste products that impaired kidneys cannot eliminate. This test is essential for dialysis patients to prevent toxin accumulation and maintain health.

EGFR (epidermal growth factor receptor) is a gene that, when mutated, can drive certain lung cancers and other malignancies. This test analyzes blood or tissue samples for specific EGFR mutations. Detecting these mutations is critical for patients with non-small cell lung cancer because it determines eligibility for targeted therapy drugs (like erlotinib or gefitinib) that specifically block the mutated EGFR protein. These targeted treatments are often more effective and better tolerated than traditional chemotherapy. This is a molecular diagnostic test that informs personalized cancer treatment strategies.

This panel measures kidney function by comparing creatinine levels in your blood and urine, typically collected over 24 hours. Creatinine is a waste product your muscles produce that healthy kidneys filter into urine. The test calculates glomerular filtration rate (GFR), which indicates how well your kidneys are clearing waste. Low clearance or elevated creatinine suggests kidney disease. This comprehensive panel helps detect early-stage kidney dysfunction before symptoms develop and monitors kidney health in people with diabetes, hypertension, or other risk factors.

This test measures how effectively your kidneys filter waste by calculating creatinine clearance from a 24-hour urine sample and blood test, then adjusting for your body size. Creatinine is a waste product from muscle metabolism that healthy kidneys remove. This calculation (also called GFR estimation) shows kidney function more accurately than blood creatinine alone. Low clearance rates suggest declining kidney function, which requires monitoring and intervention.

GFR measures how efficiently your kidneys filter waste from blood, expressed as milliliters of filtrate per minute. It's calculated using creatinine levels adjusted for age, sex, and body size. GFR is the most accurate indicator of kidney function, with different stages indicating mild, moderate, or severe kidney disease. Even small declines in GFR can signal progressive kidney disease requiring monitoring and lifestyle modifications to slow progression.