Variable displacement inflation devices and methods of use

Abstract

An inflation device that may comprise multiple plungers is disclosed. The inflation device may have multiple configurations wherein certain plungers are locked with respect to a body of the inflation device while others are configured to be displaceable within the body. Each plunger may be configured with a different effective surface area, allowing a practitioner to vary the amount of force required to attain certain pressures.

1 . An inflation device configured to displace fluid within a medical device, the inflation device comprising:
 a body member defining a reservoir;   a first plunger displaceable within the body member, the first plunger configured to automatically transition to a locked configuration wherein the first plunger is coupled to the body member when a fluid disposed within the reservoir is at or above a first pressure;   a second plunger displaceable within the body member; and   a handle operably coupled to the first and second plungers.