Hemoglobin (Hb), Free, Qualitative, Urine Test

What is the purpose of this test?

The Hemoglobin (Hb), Free, Qualitative, Urine Test is a diagnostic urine test used to detect the presence of free hemoglobin in the urine. Normally, hemoglobin is contained within red blood cells. However, if red blood cells break apart in the bloodstream (a process called hemolysis), free hemoglobin can be released and eventually pass into the urine. This condition is known as hemoglobinuria and may indicate underlying health issues such as hemolytic anemia, kidney damage, or blood transfusion reactions. By identifying free hemoglobin in the urine, this test helps healthcare providers determine whether there is internal red blood cell destruction and if additional tests or treatments are needed.

This qualitative urine test provides quick, initial results to confirm or rule out the presence of free hemoglobin, aiding in the diagnosis of several blood and kidney-related conditions. It is especially useful in evaluating unexplained dark or reddish-colored urine when red blood cells are not visible under a microscope. It can also be used to monitor individuals with known hemolytic disorders or complications from severe infections, burns, or physical trauma. Detecting free hemoglobin early can help prevent complications such as kidney damage or other systemic issues caused by free hemoglobin toxicity.

Who should get this test?

The Hemoglobin (Hb), Free, Qualitative, Urine Test may benefit:

• Individuals with dark, red, or cola-colored urine without a known cause
• Patients with a history of hemolytic anemia or similar blood disorders
• People who have recently experienced severe infections, burns, or trauma
• Individuals undergoing or recovering from blood transfusions
• People with suspected kidney damage or urinary tract problems
• Those being monitored for complications from autoimmune disorders or toxic exposures
• Athletes who perform intense endurance training and experience urine discoloration

When should I order the Hemoglobin (Hb), Free, Qualitative, Urine Test?

Individuals may consider ordering this test if they have symptoms or exposure concerns related to hemoglobinuria.

Symptoms to consider:

• Dark or reddish-brown urine, especially if not linked to food, medication, or menstruation
• Back or flank pain, often linked to kidney involvement
• Fatigue, dizziness, or paleness due to possible anemia
• Fever, chills, or signs of infection following blood transfusion or trauma
• Muscle soreness and urine color changes after intense physical activity
• Swelling, especially around the face or legs, indicating possible kidney involvement
• Nausea, vomiting, or reduced urine output, which could signal kidney distress

If you experience these symptoms or suspect internal red blood cell breakdown, the Hemoglobin (Hb), Free, Qualitative, Urine Test can provide useful information to guide diagnosis and help protect your kidney and blood health.