Final answer:
Pneumothorax as a complication of PN presents with chest pain, dyspnea, and decreased urine output.
Step-by-step explanation:
Pneumothorax, also known as a collapsed lung, can occur as a complication in a patient receiving parenteral nutrition (PN). The signs and symptoms of pneumothorax include chest pain, dyspnea (shortness of breath), and decreased urine output. It is important to note that pneumothorax can be life-threatening and requires immediate medical attention.