TY - CHAP M1 - Book, Section TI - Tension Pneumothorax with Needle Thoracentesis A1 - Barlotta, Kevin S. A1 - Stack, Lawrence B. A1 - Knoop, Kevin J. A2 - Knoop, Kevin J. A2 - Stack, Lawrence B. A2 - Storrow, Alan B. A2 - Thurman, R. Jason PY - 2021 T2 - The Atlas of Emergency Medicine, 5e AB - A tension pneumothorax results when air enters but does not exit the pleural space. Air in the pleural space accumulates and compresses the ipsilateral lung and vena cava, with a rapid decrease in cardiac output. The contralateral lung may suffer ventilation/perfusion mismatch. Subcutaneous air, tracheal deviation, jugulovenous distention (JVD), and diminished or hyperresonant ipsilateral breath sounds are clues. Subcutaneous emphysema may be visible on the neck and chest radiographs and is easily diagnosed by palpation. The released air from a tension pneumothorax can be heard escaping during a needle thoracostomy. SN - PB - McGraw-Hill CY - New York, NY Y2 - 2024/04/20 UR - accessemergencymedicine.mhmedical.com/content.aspx?aid=1181488548 ER -