What Are Medical Diagnostic Tests?

November 21, 2022 By smith 0

Every time you’ve visited the doctor with symptoms of an injury or illness, there’s a good chance your healthcare practitioner will have asked you to undergo some kind of diagnostic testing. Medical diagnostic tests are a broad category of physical examinations, both invasive and non-invasive, performed by medical experts to determine whether a patient has an ailment or disease. Learn more about the significance of diagnostic testing and the most typical medical tests that doctors request by reading the rest of this article.

Why Is Diagnostic Testing significant?

For doctors to develop successful treatment regimens that enable patients to recover as rapidly as possible with the fewest consequences, accurate and effective diagnostic methods are essential. The World Health Organization (WHO) has identified 113 important diagnostic tests that physicians hope will assist improve diagnosis—and subsequently, treatment—outcomes.

Many of us wait until the symptoms are intolerable before visiting the doctor, which is typically a clue that something strange is happening in our bodies. Even if you might believe such practice is acceptable for something as seemingly unimportant as a damaged ankle or the common cold, not all illnesses will go away on their own, and some illnesses have the capacity to be deadly if not diagnosed early.

What is it utilized for?

As previously discussed, diagnostic testing is typically done to identify the underlying problem that sent a patient to the doctor’s office, to begin with. Diagnostic testing does not, however, only serve the purpose of diagnosis. Even though there are a staggering number of medical tests used to identify an equally staggering number of illnesses, they may generally be categorised as carrying out the following roles:


A test that is done to confirm or rule out a suspected condition


An initial test with a narrow error margin for false-positive results that is rapid to administer


A repeated examination that permits evaluation of a treatment’s effectiveness


An evaluation of the effectiveness of a treatment or the development of an illness


A procedure to identify the existence of illness in asymptomatic individuals

Now that you have a general understanding of the numerous roles that a diagnostic test serves, let’s look at the specific types of diagnostic testing that physicians most frequently employed.

Diagnostic test examples

Complete Blood Count (CBC)

It is frequently the first test used to assess whether a patient has an illness or whether other causes are causing their symptoms. A CBC test is a typical type of blood test that examines fifteen distinct blood test values to provide a comprehensive overview of a person’s health.

Comprehensive Metabolic Panel (CMP)

A CMP is a fourteen14-part blood analysis, similar to a CBC, that reveals details about a patient’s present metabolism, including details about liver and kidney function, blood glucose, protein, electrolyte levels, and alkalinity/acidity.


In order to capture an image that depicts variations in tissue density, X-ray machines use modest doses of high-energy radiation waves that are directed to a particular body part. The most well-known type of diagnostic imaging is the X-ray, which is frequently used to assess problems with the legs, arms, chest, and, infrequently, the abdomen and the spine.

Computer Tomography (CT)

A cross-sectional image of a person’s interior anatomy can be created using a CT scan, a more sophisticated and detailed version of an x-ray. These devices operate by directing focused x-ray beams into an x-ray detector placed directly across from the x-ray source and through the body. The diagnosis of internal wounds, tumour growth and fractures that are otherwise asymptomatic depends heavily on CT scans.

Magnetic Resonance Imaging (MRI)

The highly-advanced imaging technique known as magnetic resonance imaging (MRI) creates images of interior organs, bones,  soft tissues, and other structures in great detail without the utilization of radiation. The best tool for identifying abnormalities in the spinal cord and the brain, particularly the presence of malignancies in these regions, is magnetic resonance imaging (MRI).


In order to present images of internal organs, tissues, and vessels on a computer screen during an ultrasound scan, a transducer [a probe utilised to emit and receive sound waves that reverberate off bodily tissues and cause echoes] is used. Outside of diagnostic uses, ultrasound technology is most frequently utilised in obstetrics to track foetal development. These scans are useful in detecting edema and infection inside the body.

This list comprises the most often used diagnostic procedures used in the initial screening phase to determine an ailment’s root cause, even though it is by no means an entire database of tests offered by physicians to help in the process of identifying and treating different types of diseases.

Going through a diagnostic test might indeed make people anxious for a number of reasons, but one of those reasons shouldn’t be fear of the procedure itself. We hope the aforementioned information has clarified any uncertainties you may have had regarding your impending medical diagnostic test and has eased any anxiety you might have been experiencing. For more info on the diagnostic tests, contact your doctor. He/she will clarify your doubts and also suggest the best places to undergo various diagnostic tests.