104 and into the lumen of one way valve 106 the pressure of the exhaled air separates the sides of the one way valve 106 allowing the air to escape therethrough after the exhaled air is expelled through the distal end of one way valve 106 and the patient inspires the sides of one way valve 106 collapse back against each other thus preventing air environmental contaminants and or blood from returning through one way valve 106 once the pneumothorax and or hemothorax is released device 100 can be affixed to the patient to do so bands 132 for example are unwound from recess 124 to the extent necessary for the adhesive bands 132 to reach the point of desired attachment on the patient the protective film is removed from the adhesive coated tabs 134 or from the adhesive coated disk 136 the adhesive side of adhesive coated bands 132 or the adhesive side of the disk 136 is then affixed to the patient 39 s body so as to stabilize the position of the pneumothorax treatment device on the patient alternatively tabs 132 or disk 136 could be stapled to the skin by methods known to those with skill in the profession device 100 is specially designed to immediately relieve tension pneumothorax and or hemothorax in the chest cavity of animals particularly humans a primary advantage of the present invention is that it can be used by pre hospital personnel such as emergency medical technicians and the like or hospital personnel with minimal training as well as by physicians and more experienced.