Section III. The form of imperative contrasting with hypothetical imperatives is the categorical imperative. This type of imperative purports to be true, or as is sometimes said, valid, apart from any presupposed end or purpose to be achieved by acting as it commands.ynthetic a priori. Kant claims that the categorical imperative is a synthetic a priori proposition. This means in part that we can know the categorical imperative that one ought to act only on maxims we can will to become universal laws independently of experience or any sensory observations.
The lung parenchyma is initially abnormal on chest radiographs in about one-half of patients. The percentage is higher on computed tomography which can detect disease when the radiograph is normal.
Pneumothorax is a condition in which air or gas collects in the pleural space or pleural cavity, which is the space between the lungs and the chest cavity. This can cause the lung to collapse. Normally, the lungs sit next to the inner surface of the chest wall. Thin membranes called pleura cover both the lungs and the chest wall. A pneumothorax occurs when air either escapes the lung or leaks in through the chest wall and builds up in the pleural space between them. This build-up of air can result in the collapse of the affected lung. There are different types of pneumothorax, and each one is defined by its cause.