Health
Fact-checked

At WiseGEEK, we're committed to delivering accurate, trustworthy information. Our expert-authored content is rigorously fact-checked and sourced from credible authorities. Discover how we uphold the highest standards in providing you with reliable knowledge.

Learn more...

What is Renal Insufficiency?

Mary McMahon
Mary McMahon
Mary McMahon
Mary McMahon

Renal insufficiency is a medical condition characterized by poor kidney function. It is also known as renal failure. When people are diagnosed with renal insufficiency, the condition is usually staged on the basis of how severely kidney function has been impaired for the purpose of developing an appropriate treatment plan. Stage I is the mildest form and Stage V is the most severe. Evaluation and treatment of patients with kidney problems may be supervised by a nephrologist, a doctor who specializes in treatment of the kidneys.

People can develop acute or chronic renal insufficiency. The acute form onsets suddenly, often as a result of an injury to the kidneys such as a physical trauma or an overdose of medication. Chronic renal insufficiency onsets slowly over time and is associated with risk factors like diabetes, cardiovascular disease, high cholesterol, high blood pressure, atherosclerosis, aging, and genetics. Damage to the kidneys puts people at risk of cardiovascular disease, and renal insufficiency can work the other way as well, with previously healthy patients developing high blood pressure and cardiovascular problems because of the kidney condition.

The kidneys and renal veins and arteries.
The kidneys and renal veins and arteries.

Symptoms of renal insufficiency vary, depending on the stage it has reached. Problems such as bloody, foamy, discolored, or strong smelling urine are commonly observed. Patients may feel fatigued, dizzy, and nauseous. Because filtration in the kidneys is slowed down, the patient may develop edema, where water is retained in the extremities and they start to swell. Patients can also become anemic, have difficulty concentrating, lose weight, struggle to urinate, experience memory loss, and develop diarrhea and vomiting.

People with renal insufficiency may experience vomiting.
People with renal insufficiency may experience vomiting.

Renal insufficiency can be diagnosed with blood tests to measure serum creatinine, a key tell-tale sign of kidney problems, and to check levels of other compounds in the blood. When the kidneys are not working properly, the things they are supposed to filter out and express in the urine start to build up in the blood, and this can be seen on a blood panel. The kidneys can also be imaged with ultrasound for signs of swelling and other abnormalities that might suggest problems with kidney function.

Renal insufficiency can cause difficulty concentrating.
Renal insufficiency can cause difficulty concentrating.

In the early stages of renal insufficiency, the condition may be manageable with medications and some dietary changes. If the disease has progressed, the patient may need dialysis, where an external machine filters the blood to assist the failing kidneys. Patients on dialysis may be considered for a kidney transplant. The transplant replaces the damaged kidney with a healthy donor kidney.

Mary McMahon
Mary McMahon

Ever since she began contributing to the site several years ago, Mary has embraced the exciting challenge of being a WiseGEEK researcher and writer. Mary has a liberal arts degree from Goddard College and spends her free time reading, cooking, and exploring the great outdoors.

Learn more...
Mary McMahon
Mary McMahon

Ever since she began contributing to the site several years ago, Mary has embraced the exciting challenge of being a WiseGEEK researcher and writer. Mary has a liberal arts degree from Goddard College and spends her free time reading, cooking, and exploring the great outdoors.

Learn more...

Discuss this Article

Post your comments
Login:
Forgot password?
Register:
    • The kidneys and renal veins and arteries.
      By: satin_111
      The kidneys and renal veins and arteries.
    • People with renal insufficiency may experience vomiting.
      By: Piotr Marcinski
      People with renal insufficiency may experience vomiting.
    • Renal insufficiency can cause difficulty concentrating.
      By: Wojciech Sobiech
      Renal insufficiency can cause difficulty concentrating.
    • Renal insufficiency may lead to edema in the extremities.
      By: Ocskay Bence
      Renal insufficiency may lead to edema in the extremities.
    • A renal ultrasound may be conducted to confirm renal insufficiency.
      By: Klaus Eppele
      A renal ultrasound may be conducted to confirm renal insufficiency.
    • Swelling and other signs of renal insufficiency can be observed during an ultrasound of the kidneys.
      By: jeff gynane
      Swelling and other signs of renal insufficiency can be observed during an ultrasound of the kidneys.
    • Advanced renal insufficiency may require dialysis treatment.
      By: Tyler Olson
      Advanced renal insufficiency may require dialysis treatment.