A caloric stimulation test is a process used to discover damages to nerves present in the ear. This test makes use of changes in temperature to detect damage to the acoustic nerves in the ear. Know why is caloric stimulation test done and how it is done.
As said above it is a procedure to check for damages in the ear especially the hearing capacities. Through caloric stimulation, warm and cold water are put into the ear canals and the reaction is examined. The other names include caloric reflex test, warm water caloric, and cold water caloric.
A caloric stimulation test is a test used to check damages to the acoustic nerve which is responsible for hearing and balance. The test is also used to check for damages to the brain stem.
It is performed to check the function of the acoustic nerve which is engaged in hearing and balance. It is even done to evaluate the function of brain regions involved in balance.
The other reasons why it is done include;
It is done by injecting cold water followed by warm water into the ear canals. This process is carried in 1 ear at once. The dropped water stimulates the nerves present in the inner ear.
Usually, caloric stimulation follows the below steps;
Before the test, the eardrum is examined to ensure it is healthful and not unhealthy. This is done because pouring water into ears that have damaged eardrums can cause ear infections.
Around the ears, electrodes are placed and linked to a computer. These electrodes are placed to calculate eye movement in the course of the test.
A small quantity of cold water is injected into the ear canal. This modifies the temperature of the interior ear and leads to rapid, side-to-side eye movements known as nystagmus. The cold water makes the eyes move away from the direction of the cold water and again moves them back slowly.
After cold water warm water is inserted into the ear. When this happens eyes should move towards the warm water and then move away back slowly. The same process is also done on the other ear.
The electrodes check the eye movements while the computer records the movements. Sometimes the examiner also monitors the eye movements visually.
Some medicines and foods affect the test results. Before a day of the test, you must avoid having the below;
Normal results connote that you don’t have any damages to your acoustic nerve.
If the eye movements are irregular, it could be a signal of acoustic nerve injury, injury to the balance sensors in the ears, or brain damage.
The reasons for abnormal results comprise;
Ear nerve damage can even be due to a few medicines including;
Results from this test can even be used to validate the below;
The test could lead to a few minor discomforts, particularly when cold water is injected. The test could even cause small moods of vertigo, which may cause nausea in a few people.
Although unusual, it is probable for too much water pressure to hurt an eardrum. For this cause, only a little quantity of water should be used. Damage is more supposed to happen in case the eardrum has damage previously. A doctor will check the eardrum before the process and this test must not be conducted if the eardrum is damaged.
If you feel you are having hearing issues it is better to go for this test after consulting your doctor.
Sudheendra is a passionate blogger for 8 years and holds a Degree in Journalism & Mass Communications. His writings particularly focus on health, medicine, diet & lifestyle. For him, everything that interlinks and relates to health & medical world entices him. His write-ups aim at educating people not by just giving facts but by infusing human touch.
Walking pneumonia, also known as atypical pneumonia, is a milder form of pneumonia that, while…
Internal bleeding is a medical condition where blood escapes from damaged blood vessels and accumulates…
Serotonin, commonly referred to as the "feel-good" neurotransmitter, plays a critical role in regulating mood,…
Autism Spectrum Disorder (ASD) and Attention-Deficit/Hyperactivity Disorder (ADHD) are two neurodevelopmental conditions that, while distinct,…
The year 2024 has seen a significant Listeria outbreak, raising alarms across several countries. Listeria…
Metabolic conditioning (MetCon) has gained significant attention in the fitness world, often hailed as a…