#$%^&*AU2020213362A120200827.pdf#####ABSTRACT The present disclosure provides a medical system, comprising: a catheter shaft configured to be positioned within a vein of a patient； a selectively deployable restrictor coupled to the catheter shaft and configured to be positioned within the vein； at least one inlet opening into the catheter shaft； and a pump comprising an impeller configured to facilitate suction of fluid into the catheter shaft through the at least one inlet opening. 1003128336
