What does a PaCO2 level above 45 torr indicate about a patient’s ventilation status?

A PaCO2 level above 45 torr indicates that the carbon dioxide (CO2) is accumulating in the blood, which typically signifies hypoventilation. When ventilation is ineffective, the body is unable to adequately remove CO2, leading to respiratory acidosis. This retention of carbon dioxide suggests that the patient is not ventilating properly, as effective ventilation would lead to lower levels of CO2 in the blood. Elevated PaCO2 levels reflect a problem in the inhalation and exhalation process, confirming respiratory failure or inadequate gas exchange. It is important for healthcare professionals to recognize this condition because it necessitates prompt intervention to restore normal ventilation and gas exchange.