Which of the following correctly matches pressure units with their approximate equivalents?

The correct match of pressure units with their approximate equivalents is accurately represented by the first choice. At sea level, standard atmospheric pressure is defined as 1 atmosphere (atm), which is equivalent to 760 millimeters of mercury (mmHg), 101.3 kilopascals (kPa), and 14.7 pounds per square inch (psi). These conversions are critical in medical settings when administering gases, as understanding pressure measurements ensures that the correct dosage and pressure are applied in various treatments.

The relationship between these units is based on established scientific principles. For example, 1 atm is universally recognized in various fields, including medicine, physics, and engineering, as the baseline for measuring pressure. Knowing the accurate equivalents helps professionals in the medical field communicate effectively and make informed decisions regarding gas delivery and equipment calibration, preventing errors in gas administration that could impact patient safety.