Friedrich's sign

Friedreich's sign is "Friedrich's Acoustic Transformation". The patient's chest is examined. When there is a thin wall in the lung, the deep inhalation percussion shows a high-pitched drum sound, and when exhaled, the percussion tone becomes low. Basic Information Specialist Category: Cardiovascular Examination Category: Other Examinations Applicable gender: whether men and women apply fasting: not fasting Tips: Poor rest before check, improper diet, excessive fatigue. Normal value No high-profile drum sounds. Clinical significance Abnormal result When there is a thin wall in the lung, the deep inhalation percussion shows a high-pitched drum sound, and when exhaled, the percussion tone becomes lower. Found in pericarditis and calcified pericardium and tricuspid regurgitation. People who need to be examined: patients with cardiovascular disease. Precautions Taboo before the examination: poor rest, improper diet, excessive fatigue. Requirements for inspection: 1. The environment should be quiet so as not to affect the judgment of the percussion sound. 2. It is desirable to take a seat or a lying position; 3. Apply wrist movements during percussion. 4. The plate finger should be close to the part to be inspected, and the other fingers should be lifted slightly, and should not be in contact with the body surface. 5. Percussion refers to the direction perpendicular to the direction of the board. 6. Sniper strength is even and stable. 7. Attention should be paid to the comparison and identification of symmetrical parts during percussion. 8. When you are in percussion, you should not only pay attention to the changes in the percussion sound, but also pay attention to the difference in the vibration of different lesions. The two should cooperate with each other. Inspection process The patient's chest is examined. When there is a thin wall in the lung, the deep inhalation percussion shows a high-pitched drum sound, and when exhaled, the percussion tone becomes low. Not suitable for the crowd Inappropriate crowd: None. Adverse reactions and risks Nothing.