Glomerular Filtration Rate (GFR)

What is glomerular filtration rate (GFR)

Glomerular filtration rate (GFR) is a common blood test that evaluates your overall kidney functioning. Glomeruli are tiny filters in the kidneys that remove excess fluids and waste from the blood. A GFR test lets your provider know how much blood passes through the filters every minute. They calculate GFR using a mathematical formula that estimates filtration efficiency.

Why might I need GFR rate testing?

Your Hypertension Nephrology Associates, PC specialist might suggest a GFR test if you struggle with or are at risk of:

• Kidney disease
• Diabetes
• High blood pressure
• Family history of kidney problems

Some of the symptoms associated with kidney issues include changes in urination patterns, fatigue, itching, muscle cramps, and swelling in your legs, feet, or arms. You might also have nausea, vomiting, or a reduced appetite. 

Diagnosing and treating kidney disease in the early stages is the best way to effectively treat your condition.

Is GFR testing right for me?

Your Hypertension Nephrology Associates, PC provider lets you know if you need a GFR test after reviewing your symptoms, medical history, medication regimen, and lifestyle habits. They also complete a physical exam and check your pulse, blood pressure, and other vital signs. In addition to GFR testing, you may need urine testing, imaging procedures, or a biopsy. 

What should I expect during a GFR test?

Before you undergo GFR testing, you might need to avoid food and drinks (fast) for several hours before your scheduled appointment. 

During a GFR test, your Hypertension Nephrology Associates, PC specialist uses a small needle to take a blood sample from a vein in one of your arms. The procedure often takes less than five minutes. A lab then analyzes the sample, allowing your provider to evaluate the results.

What happens after my test?

There’s no downtime after you undergo a GFR test, so you can resume normal daily activities immediately. You might have some swelling, redness, or tenderness at the treatment site. Your Hypertension Nephrology Associates, PC, provider reviews the results with you, determines if you have kidney disease, and lets you know the next best steps. 

They may suggest you make diet and nutrition changes, take medications, maintain an ideal body weight, and avoid smoking and alcohol. Kidney failure patients may need to undergo dialysis or kidney transplantation. 

To learn more about GFR tests and find out if you need one, call the Hypertension Nephrology Associates, PC office, or book an appointment online today.