**Example percussion:**
History of origin: **Percussion (percussion)** is a diagnostic method that involves tapping the surface of the human body with fingers and studying the sound phenomena that arise. Percussion (Latin percussio - “blow”) is a technique for studying the respiratory system by tapping. If the pressure is lower than atmospheric, that is, normal, when pressed, the percussion sound is better heard in the armpit (since it accumulates in the rarograde compared to the reprisal and crackling ones, but their number increases with hypertension of the right ventricle. The sound will be higher above the pulmonary sound than higher in left hypochondrium. With good filling of the stomach, the sound will be at the level of the attachment of the heart to the sternum. Often percussion is determined by the expansion of the boundaries of relative dullness due to flatulence of the abdominal cavity. Normally, a clear pulmonary sound is heard on the posterior wall of the chest in the lower intercostal spaces, the distance between 4-5 intercostal spaces. In a healthy adult, the chest can be palpated freely, its mobility is not limited **Obraztsova Percussion** - translated from English means - test, percussion is a simple and popular method of studying the lungs. This method is mandatory for any pediatrician and adult patient So how is exemplary percussion performed?The method consists of lightly tapping the surface of the patient's chest with a percussion hammer. The doctor can determine the location of the sound, its height and duration, which makes it possible to distinguish between various pathologies. Trying to break through the hard ribs and get a response touch with a finger or palm. This is how the doctor determines the presence of wet noises on the chest, which may indicate respiratory failure.