coin knock sign

Coinsign is a "coin sign", also known as "coin test", "Trauch metal murmur", "Sekar levy", "Sieer levy". A method of examining pneumothorax or exudative pleurisy. The patient takes the supine position. The examiner lays a coin flat on the side of the side of the chest wall, then slams the coin into another coin, and auscultates the corresponding part of the back. If you hear a clear metallic tone, the drum sound is heard. That is, the coin is slammed positive. Basic Information Specialist Category: Respiratory Examination Category: Other Inspections Applicable gender: whether men and women apply fasting: not fasting Tips: The environment should be quiet, so as not to affect the judgment of the diagnosis. Normal value There is no noise in the chest, no chest pain, and the breathing is even and normal. Clinical significance Abnormal results accumulated more liquid or gas in the pleural cavity, pneumothorax or exudative pleurisy. People who need to be examined have the above symptoms. 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. When you are in the chest, you can take a sitting position or a lying position. 3. Use the wrist joint instead of the elbow joint 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 takes the supine position. The examiner lays a coin flat on the side of the side of the chest wall, then slams the coin into another coin, and auscultates the corresponding part of the back. If you hear a clear metallic tone, the drum sound is heard. That is, the coin is slammed positive. This sign is mainly caused by the accumulation of more liquid or gas in the pleural cavity, which enhances or resonates with the sound transmission, and transmits the metal impact sound of the two coins to the back. Not suitable for the crowd Inappropriate crowd: None.