Blood flow control devices, systems, and methods

A blood flow control system comprising:

• a blood flow control device comprising an elongate body, a balloon coupled to an end portion of the elongate body, a first sensor coupled to the elongate body proximal to the balloon, and a second sensor coupled to the elongate body distal to the balloon, wherein the balloon is configured for placement within a blood vessel of a patient;
• a controller communicably coupled to the first and second sensors, wherein the controller comprises a housing;
• a pump in fluid communication with the balloon and releasably coupled to the housing of the controller;
• and
• a motor configured to actuate the pump,
• wherein the pump is configured to be:
• decoupled from the housing of the controller and manually actuated to adjust a volume of the balloon and coupled to the housing of the controller and actuated by the controller to adjust the volume of the balloon, and
• wherein the controller is configured to automatically adjust a volume of the balloon based on:
• a) measurements from one or more of the first sensor and the second sensor and b) a target blood pressure or blood pressure range contained on the controller and to determine a change in the volume of the balloon based on movement of the motor.