Final answer:
Increasing FiO2 in cardiogenic shock aids in improving blood oxygenation when the heart's pumping ability is reduced. For carbon monoxide poisoning, administering 100 percent oxygen displaces the carbon monoxide from hemoglobin, thus restoring its oxygen-carrying capacity.
Step-by-step explanation:
Cardiogenic shock is a severe condition that arises when the heart cannot maintain adequate cardiac output, often resulting from a myocardial infarction. Increasing the fraction of inspired oxygen (FiO2) is part of the treatment for cardiogenic shock as it can improve oxygenation of the blood when the heart's pumping capacity is compromised. Typically, healthcare providers will increase FiO2 using methods such as oxygen therapy and mechanical ventilation, depending on the patient's needs and the severity of the condition. The goal is to ensure adequate tissue oxygenation and to minimize further damage to the heart and other organs.
In cases of carbon monoxide poisoning, the administration of 100 percent oxygen is vital. Carbon monoxide has a much higher affinity for hemoglobin than oxygen, forming carboxyhemoglobin which prevents oxygen binding and delivery to tissues. Treatment with 100 percent oxygen increases the oxygen concentration in the blood, displacing carbon monoxide from hemoglobin and restoring its function as an oxygen transporter. Carbon dioxide, in contrast, would not aid in displacing carbon monoxide from hemoglobin, nor would it support oxygen transport to body tissues.