In which position is the patient's head elevated at 45 degrees?

The semi-Fowler position is characterized by the patient's head being elevated at approximately 30 to 45 degrees. This position is commonly used in medical settings to promote comfort and ease of breathing for patients, especially those with respiratory issues, as it allows gravity to assist in lung expansion. Additionally, this position helps reduce the risk of aspiration in patients who may have difficulty swallowing.

In contrast, the sitting position is typically at a more upright angle, usually around 90 degrees, which may not be beneficial or necessary for all patients. The supine position involves lying flat on the back with the head and body aligned horizontally and does not involve elevation. The prone position refers to lying flat on the stomach, which would not elevate the head at all. The semi-Fowler position provides an effective balance of head elevation that supports patient care, making it the appropriate choice in this context.