Kidney Function Test | Life Line Screening

Kidney Function Test

The kidneys are critical, life-sustaining organs necessary for the body to effectively eliminate waste, filter out toxins, balance fluids, regulate blood pressure, build strong bones, and create red blood cells.

Kidney disease, left untreated, causes waste, fluid, and toxins to build up in the body, which can lead to serious health problems like heart disease, stroke, anemia, damage to the central nervous system, decreased immune response, and ultimately death.

$60.00
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About Chronic Kidney Disease

Chronic Kidney Disease (CKD) affects approximately 14% of people in the U.S., and the primary causes are diabetes and high blood pressure. Kidney disease will often develop without any symptoms, and may not be detected until kidney function is significantly impaired. When it is detected early, CKD can be slowed through medication or lifestyle changes. There is no cure for kidney disease; treatment focuses on preventing the worsening of kidney damage. End stage kidney disease requires either dialysis or a kidney transplant. Each year, kidney disease kills more people than breast or prostate cancer.2

Chronic Kidney Disease Screening Details

A simple finger-stick blood sample is tested to measure the creatinine level in the blood, as well as the rate blood is being filtered through the kidneys. Creatinine is a waste product that is filtered out by the kidneys and routed to the urine. Elevated levels of creatinine in the blood can sometimes indicate that the kidneys are not functioning as well as they should to filter waste.

Your results letter will provide two pieces of information about your kidney function: one is the creatinine level in your blood, measured in mg/dL (milligrams per deciliter). This result will be classified as low, normal, abnormal, or abnormal critical. The normal range for this measurement is different for men and women, so your gender will be factored into the result expected for normal kidney function. The second result you will receive is the eGFR (Estimated Glomerular Filtration Rate) which measures the rate that blood is passing through the tiny filters in the kidneys (called glomeruli). This data will be classified as normal, abnormal, or abnormal critical. Again, what is considered a normal filtration rate depends on your age, gender, and body size. Filtration rate slows down with age. Your results report will also direct you to follow up with your personal physician, if needed.

Warning Signs of Chronic Kidney Disease

Symptoms of chronic kidney disease may not appear until late in the course of the disease, but there can be warning signs:

  • Difficulty concentrating and sleeping
  • Poor appetite, nausea or vomiting
  • Fatigue/loss of energy
  • Dry, Itchy skin
  • High Blood pressure
  • Blood and/or protein in the urine
  • Decreasing glomerular filtration rate (GFR). GFR is the best measure of kidney function
  • Frequent urination, especially at night and accompanied by pain or difficulty urinating
  • Puffiness around the eyes, especially in the morning; swelling of hands and feet

Risk Factors for Chronic Kidney Disease

  • Diabetes
  • High Blood Pressure
  • Age 60+
  • Family history of Kidney Disease
  • Race and ethnicity: African Americans, Hispanics, Asians, American Indians and Pacific Islanders
  • Hereditary factors such as polycystic kidney disease
  • Abnormally elevated creatinine levels or decreasing glomerular filtration rates (GFR)

Who is kidney function testing for?

  • People with diabetes, pre-diabetes, high blood pressure, or pre-hypertension (borderline high blood pressure) are most at risk for developing kidney disease.
  • All adults age 50+, especially those with a family history of kidney disease, diabetes, and/or high blood pressure
  • Certain ethnic groups: African Americans, Hispanics, Asians, American Indians and Pacific Islanders are at higher risk of developing kidney disease and should consider getting a kidney test

Ages

  • Adults age 60+
  • Adults age 50+ with risk factors (diabetes and high blood pressure)
  • People taking medications that negatively impact the kidneys (talk to your doctor about the medications you are taking) should consider a kidney function test

Frequency

The National Kidney Disease Education Program1 suggests the following people receive a kidney function test:

  • People with diabetes should be checked for kidney function once per year
  • People newly diagnosed with high blood pressure should receive a kidney test every three years if their medication and treatment is keeping their blood pressure in the normal range
  • People who have a family history of kidney failure should receive a kidney function test every three years as long as their test results show normal kidney function

Schedule this Screening

*Screening availability may be limited by location.

Chronic Kidney Disease FAQ

  • How common is Chronic Kidney Disease?

    14% of people in the U.S. have CKD. Half of people with CKD also have diabetes and/or cardiovascular disease.2

  • What causes CKD?

    High blood pressure and diabetes are the main causes of CKD.2

  • Is kidney disease life-threatening?

    Each year, kidney disease kills more people than breast or prostate cancer.2

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1 National Institute of Diabetes and Digestive and Kidney Diseases, National Institutes of Health, 2017, https://www.niddk.nih.gov/health-information/communication-programs/nkdep/identify-manage-patients/evaluate-ckd

2 National Institute of Diabetes and Digestive and Kidney Diseases, National Institutes of Health, Kidney Disease Statistics for the United States, https://www.niddk.nih.gov/health-information/health-statistics/kidney-disease