Oil-Free vs Oil-Sealed Vacuum Pumps for Hospital Use In the sterile, high-stakes environment of a modern hospital, every piece of equipment is evaluated through a single lens: patient safety. For medical vacuum systems—the silent infrastructure that powers surgical suction, airway clearance, and anesthesia gas scavenging—the choice of pump technology carries profound implications. This decision affects not only reliability and maintenance costs but also the fundamental safety of the system itself.