A differential pressure limiter (226) for limiting a differential fluid pressure of cryogenic fluid (228) during a cryoablation procedure includes one or more of a fluid source (216), a pressure regulator (230), one or more proportional valves (232) and a backpressure regulator (234). The fluid source (216) selectively retains cryogenic fluid (228). The pressure regulator (230) receives cryogenic fluid (228) from the fluid source (216) and regulates a fluid pressure of the cryogenic fluid (228). The proportional valve(s) (232) receives cryogenic fluid (228) from the pressure regulator (230) and at least partially controls a flow rate of the cryogenic fluid (228). The backpressure regulator (234) receives cryogenic fluid (228) from the proportional valve(s) (232) and manually and/or automatically changes and/or decreases the differential fluid pressure of the cryogenic fluid (228) across the proportional valve(s) (232) and/or limits the differential fluid pressure across the proportional valve(s) (232) within a predetermined range.
