What is Random Blood Sugar (RBS) Test: Procedure, Symptoms & Risks

Keeping track of blood sugar is essential to avoid serious health issues. As you can infer from the name, this test can be done randomly at any time of the day, mainly for diagnosing diabetes. Therefore, it is unnecessary to fast before the procedure if someone wants to check their sugar levels.

Continue reading to find out more about “what is RBS test”.

A random blood sugar (RBS) test is a type of blood sugar test that is done to estimate blood sugar levels. It is also known as a casual blood glucose test (CBG). Sugar levels in a healthy person do not vary much, but in a diabetic patient, it fluctuates throughout the day. Hence, there is no fixed time for getting an RBS test.

An RBS test is generally used for a quick diagnosis of elevated glucose levels. However, it is essential to keep a check on blood sugars because, over time, it can damage your nerves, kidneys, blood vessels and eyes.

The procedure for the RBS test includes this set of elements.

Step 1: Firstly, a phlebotomist will insert a needle into your vein to draw a blood sample. Then store it in a vial or test tube and send it to a lab for further analysis.

Step 2: Followed by an analysis of your blood sample by a certified technician.

Step 3: Within 48 hours, you will get the results via mail or the lab's portal. Sometimes, they even deliver the results to the doorstep.

It requires no specific preparation for a random blood sugar test. Nevertheless, you must know what you will go through before, after and during an RBS test.

Before the Test: There is a need not to follow any specific routine or prepare for a random blood sugar test. You can eat or drink as usual, as there is no requirement for fasting.

During the Test: The technician at the lab will sanitise your arm before drawing the blood sample. It does not cause a lot of pain but a minor sting.

After the Test: Once you get the results from the lab, consult with your doctor to know whether you will need further treatment.

There are bare minimum risks associated with a random blood sugar test. However, you may have the following conditions.

• Slight pain at the sting of the needle
• Light-headedness
• An occasional bruise where the needle is put

A doctor may ask for a random blood sugar test if you have any symptoms of higher or lower glucose levels.

Symptoms of higher blood glucose levels:

• Blurred vision
  
• Fatigue
• Increased in thirst
• More urination
• Wounds or sores that do not heal
• Weight loss
• Numbness in your hands and feet

Symptoms of lower blood glucose levels:

• Feeling jittery
• Hunger
• Fatigue
• Dizziness
• Confusion
• Headache
• Fast heartbeat
• Difficulty in speaking
• Troubled vision
• Seizures

Besides these signs and symptoms, doctors also recommend RBS tests to those at risk of developing type 2 diabetes.

If the results show higher glucose levels than usual, it suggests you are at a higher risk of developing diabetes. Elevated glucose levels can also be a sign of:

• Pancreatic disorder
• Stress
• Hyperthyroidism

In case your lab test comes positive for diabetes, and your glucose levels are lower than normal, it may be due to the following:

• Side effects from some diabetes medicines
• Not maintaining a healthy diet, especially after taking diabetic medicines
• A sudden increase in physical activities

However, if you do not have diabetes, yet your results show lower sugar levels, it may indicate:

• Kidney disease
• Liver disease
• Hypothyroidism
• Alcohol use disorder (AUD)

So far, we talked about "what is the RBS test" and other questions one may have regarding random blood sugar tests. It has very minimal side effects, which reduce the risks of such a test. Thus, you must consult a doctor for a random blood sugar test if you have any of the symptoms. Getting this test will help you avoid sugar fluctuations in your body.

A routine RBC (Red Blood Cell) test is typically done as part of a complete blood count (CBC) to monitor overall health or investigate symptoms like fatigue or weakness. If you have a medical condition like anaemia, chronic kidney disease, or ongoing blood loss, your doctor might advise more frequent testing.

Some health insurance plans include annual preventive checkups as part of their coverage, which can help you stay on track with routine tests like the RBC test, without additional out-of-pocket costs.