Final answer:
In patients with cardiopulmonary arrest, a 100% (option C) oxygen concentration is used to maximize tissue oxygenation. This high oxygen concentration is also essential in treating carbon monoxide poisoning as it displaces carbon monoxide from hemoglobin, facilitating its rapid removal from the bloodstream.
Step-by-step explanation:
The oxygen concentration to be used in patients with cardiopulmonary arrest is 100%. This high concentration of oxygen is critical in medical emergencies to ensure the maximum amount of oxygen can be delivered to the tissues of the body.
Administration of 100 percent oxygen is crucial in saving a patient from carbon monoxide poisoning because it helps to displace the carbon monoxide from hemoglobin, allowing for its faster elimination from the bloodstream. Giving carbon dioxide would not work as it competes with oxygen to bind to hemoglobin and would worsen the patient's ability to oxygenate tissues.
In reference to the graph plotting percent oxygen saturation of hemoglobin against oxygen partial pressure, the leveling off of the curve around a partial pressure of 60 mmHg indicates that the hemoglobin is nearly fully saturated with oxygen. Thus, increasing the partial pressure beyond this point does not significantly increase the oxygen saturation, implying the hemoglobin's oxygen-binding sites are almost completely occupied.