A patient who was admitted in a serious condition with a bilateral fracture of the ribs along the scapular and posterior axillary lines has 4 ribs on the right and 3 ribs on the left, there is a pronounced subcutaneous emphysema. According to clinical and radiological data, there is no pneumothorax or hemothorax. What medical measures should be recommended to the patient? : Select one or more answers: a. dynamic monitoring b. drainage of both pleural cavities c. insertion of needles into the subcutaneous tissue of the anterior surface of the chest d. incisions in the skin of the chest and neck e. implementation of novocaine blockades