March 2021

SpO2 – Normal blood oxygen levels (saturation)

Oxygen saturation, commonly referred to as blood oxygen level and also known as SpO2, measures the amount of oxygen that is in your blood. More precisely, oxygen saturation is the measure of what percentage of hemoglobin is bound to oxygen molecules. The pulse oximeter is the non-invasive instrument that allows to take such measure thanks …

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What causes crackling sound in ear? Eustachian tube dysfunction and other diagnoses

Crackling or popping noises in the ears are a fairly common symptom. When patients report of crackling sounds, these are described as the sound of Rice Krispies often without any pain or discomfort. There are many possible causes of tinnitus, which is the medical term for any sound coming from within the ear and with …

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ear examination otoscope doctor and patient