Caloric test - checks which ear may be causing vertigo

Before thinking about any test, urgent warning signs must be separated from routine vertigo complaints.

• Dizziness with weakness, slurred speech, facial drooping, confusion or double vision
• Severe new headache, fainting, chest pain, repeated vomiting or dehydration
• Vertigo after head injury or with sudden hearing loss
• Severe imbalance where walking safely is difficult

Early evaluation helps identify serious or fast-changing ENT problems before they become harder to manage.

A caloric test is an inner-ear vertigo test used to compare how the right and left balance organs respond. It helps the doctor understand whether one side may be weaker.

This can be useful when dizziness is repeated, unclear or not explained fully by basic examination alone.

• Compares right and left inner-ear balance response
• Helps identify possible one-sided vestibular weakness
• Often interpreted with VNG and ENT examination
• Used selectively, not for every dizzy patient

The test may be advised when the doctor suspects an inner-ear balance problem and needs more detailed information about side-to-side balance response.

• Repeated vertigo attacks
• Imbalance while walking
• Dizziness with nausea
• Possible one-sided inner-ear weakness
• Unclear vertigo after initial review
• Need for advanced vestibular work-up

Not all dizziness requires caloric testing. It is most useful when the result can guide treatment, follow-up or whether further evaluation is needed.

• Symptoms do not fit simple BPPV clearly
• Vertigo keeps returning despite treatment
• One-sided vestibular weakness is suspected
• The doctor needs objective balance information

The doctor first checks the vertigo history, triggers, hearing symptoms, ear examination and whether positional vertigo is likely. The caloric test is then used only if it answers a useful clinical question.

• ENT consultation and symptom pattern review
• Explanation of why the test is being advised
• Right-left balance response comparison
• Result interpretation along with VNG, hearing or positional findings when relevant

The result helps the ENT doctor decide whether the vertigo pattern supports one-sided inner-ear weakness, whether BPPV treatment is needed, or whether another cause should be considered.

• Targeted vertigo treatment based on the likely cause
• BPPV manoeuvre if positional vertigo is confirmed separately
• Medicines only when symptoms need short-term control
• Balance guidance or follow-up when weakness is identified

The goal is not to do more tests unnecessarily. The goal is to make the treatment path clearer when repeated vertigo is affecting daily life.